From c13f7e1a94007c4381814e7daf033e3e8f0663f3 Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Fri, 29 Oct 2010 23:32:01 +0200 Subject: drbd: don't recvmsg with zero length This should fix a performance degradation we observed recently. If we don't expect any subheader, we should not call into the tcp stack, as that may add considerable latency if there is no data available at this point. For a synthetic synchronous write load with single outstanding writes, this additional latency when processing the "unplug remote" packet added up to a performance degradation factor >= 10. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c index 89d8a7c..24487d4 100644 --- a/drivers/block/drbd/drbd_receiver.c +++ b/drivers/block/drbd/drbd_receiver.c @@ -3627,17 +3627,19 @@ static void drbdd(struct drbd_conf *mdev) } shs = drbd_cmd_handler[cmd].pkt_size - sizeof(union p_header); - rv = drbd_recv(mdev, &header->h80.payload, shs); - if (unlikely(rv != shs)) { - dev_err(DEV, "short read while reading sub header: rv=%d\n", rv); - goto err_out; - } - if (packet_size - shs > 0 && !drbd_cmd_handler[cmd].expect_payload) { dev_err(DEV, "No payload expected %s l:%d\n", cmdname(cmd), packet_size); goto err_out; } + if (shs) { + rv = drbd_recv(mdev, &header->h80.payload, shs); + if (unlikely(rv != shs)) { + dev_err(DEV, "short read while reading sub header: rv=%d\n", rv); + goto err_out; + } + } + rv = drbd_cmd_handler[cmd].function(mdev, cmd, packet_size - shs); if (unlikely(!rv)) { -- cgit v0.10.2 From a115413de13ae6beb0cbfc198afe385a261ab284 Mon Sep 17 00:00:00 2001 From: Lars Ellenberg Date: Sat, 13 Nov 2010 20:42:29 +0100 Subject: drbd: fix for spin_lock_irqsave in endio callback In commit 9b7f76dc37919ea36caa9680a3f765e5b19b25fb, Author: Lars Ellenberg Date: Wed Aug 11 23:40:24 2010 +0200 drbd: new configuration parameter c-min-rate a bad chunk slipped through, which is now reverted as well, restoring the correct irqsave for the endio callback. This patch also add comments at both req_mod() and in the endio callback so it should not happen again. Signed-off-by: Philipp Reisner Signed-off-by: Lars Ellenberg diff --git a/drivers/block/drbd/drbd_req.h b/drivers/block/drbd/drbd_req.h index 181ea03..ab2bd09 100644 --- a/drivers/block/drbd/drbd_req.h +++ b/drivers/block/drbd/drbd_req.h @@ -339,7 +339,8 @@ static inline int _req_mod(struct drbd_request *req, enum drbd_req_event what) } /* completion of master bio is outside of spinlock. - * If you need it irqsave, do it your self! */ + * If you need it irqsave, do it your self! + * Which means: don't use from bio endio callback. */ static inline int req_mod(struct drbd_request *req, enum drbd_req_event what) { diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c index 47d223c..34f224b 100644 --- a/drivers/block/drbd/drbd_worker.c +++ b/drivers/block/drbd/drbd_worker.c @@ -193,8 +193,10 @@ void drbd_endio_sec(struct bio *bio, int error) */ void drbd_endio_pri(struct bio *bio, int error) { + unsigned long flags; struct drbd_request *req = bio->bi_private; struct drbd_conf *mdev = req->mdev; + struct bio_and_error m; enum drbd_req_event what; int uptodate = bio_flagged(bio, BIO_UPTODATE); @@ -220,7 +222,13 @@ void drbd_endio_pri(struct bio *bio, int error) bio_put(req->private_bio); req->private_bio = ERR_PTR(error); - req_mod(req, what); + /* not req_mod(), we need irqsave here! */ + spin_lock_irqsave(&mdev->req_lock, flags); + __req_mod(req, what, &m); + spin_unlock_irqrestore(&mdev->req_lock, flags); + + if (m.bio) + complete_master_bio(mdev, &m); } int w_read_retry_remote(struct drbd_conf *mdev, struct drbd_work *w, int cancel) -- cgit v0.10.2 From 5478755616ae2ef1ce144dded589b62b2a50d575 Mon Sep 17 00:00:00 2001 From: Xiaotian Feng Date: Mon, 29 Nov 2010 10:03:55 +0100 Subject: block: check for proper length of iov entries earlier in blk_rq_map_user_iov() commit 9284bcf checks for proper length of iov entries in blk_rq_map_user_iov(). But if the map is unaligned, kernel will break out the loop without checking for the proper length. So we need to check the proper length before the unalign check. Signed-off-by: Xiaotian Feng Cc: stable@kernel.org Signed-off-by: Jens Axboe diff --git a/block/blk-map.c b/block/blk-map.c index 5d5dbe4..e663ac2 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -201,12 +201,13 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, for (i = 0; i < iov_count; i++) { unsigned long uaddr = (unsigned long)iov[i].iov_base; + if (!iov[i].iov_len) + return -EINVAL; + if (uaddr & queue_dma_alignment(q)) { unaligned = 1; break; } - if (!iov[i].iov_len) - return -EINVAL; } if (unaligned || (q->dma_pad_mask & len) || map_data) -- cgit v0.10.2 From 364829b1263b44aa60383824e4c1289d83d78ca7 Mon Sep 17 00:00:00 2001 From: Slava Pestov Date: Wed, 24 Nov 2010 15:13:16 -0800 Subject: tracing: Fix panic when lseek() called on "trace" opened for writing The file_ops struct for the "trace" special file defined llseek as seq_lseek(). However, if the file was opened for writing only, seq_open() was not called, and the seek would dereference a null pointer, file->private_data. This patch introduces a new wrapper for seq_lseek() which checks if the file descriptor is opened for reading first. If not, it does nothing. Cc: Signed-off-by: Slava Pestov LKML-Reference: <1290640396-24179-1-git-send-email-slavapestov@google.com> Signed-off-by: Steven Rostedt diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index ee6a733..21db0de 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -2339,11 +2339,19 @@ tracing_write_stub(struct file *filp, const char __user *ubuf, return count; } +static loff_t tracing_seek(struct file *file, loff_t offset, int origin) +{ + if (file->f_mode & FMODE_READ) + return seq_lseek(file, offset, origin); + else + return 0; +} + static const struct file_operations tracing_fops = { .open = tracing_open, .read = seq_read, .write = tracing_write_stub, - .llseek = seq_lseek, + .llseek = tracing_seek, .release = tracing_release, }; -- cgit v0.10.2 From d1ae8ffdfaa16b2ab2e9346e81cf0ab6eaaae347 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Wed, 1 Dec 2010 19:34:46 +0100 Subject: blk-throttle: Trim/adjust slice_end once a bio has been dispatched o During some testing I did following and noticed throttling stops working. - Put a very low limit on a cgroup, say 1 byte per second. - Start some reads, this will set slice_end to a very high value. - Change the limit to higher value say 1MB/s - Now IO unthrottles and finishes as expected. - Try to do the read again but IO is not limited to 1MB/s as expected. o What is happening. - Initially low value of limit sets slice_end to a very high value. - During updation of limit, slice_end is not being truncated. - Very high value of slice_end leads to keeping the existing slice valid for a very long time and new slice does not start. - tg_may_dispatch() is called in blk_throtle_bio(), and trim_slice() is not called in this path. So slice_start is some old value and practically we are able to do huge amount of IO. o There are many ways it can be fixed. I have fixed it by trying to adjust/cleanup slice_end in trim_slice(). Generally we extend slices if bio is big and can't be dispatched in one slice. After dispatch of bio, readjust the slice_end to make sure we don't end up with huge values. Signed-off-by: Vivek Goyal Signed-off-by: Jens Axboe diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 004be80..2d134b7 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -355,6 +355,12 @@ throtl_start_new_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw) tg->slice_end[rw], jiffies); } +static inline void throtl_set_slice_end(struct throtl_data *td, + struct throtl_grp *tg, bool rw, unsigned long jiffy_end) +{ + tg->slice_end[rw] = roundup(jiffy_end, throtl_slice); +} + static inline void throtl_extend_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw, unsigned long jiffy_end) { @@ -391,6 +397,16 @@ throtl_trim_slice(struct throtl_data *td, struct throtl_grp *tg, bool rw) if (throtl_slice_used(td, tg, rw)) return; + /* + * A bio has been dispatched. Also adjust slice_end. It might happen + * that initially cgroup limit was very low resulting in high + * slice_end, but later limit was bumped up and bio was dispached + * sooner, then we need to reduce slice_end. A high bogus slice_end + * is bad because it does not allow new slice to start. + */ + + throtl_set_slice_end(td, tg, rw, jiffies + throtl_slice); + time_elapsed = jiffies - tg->slice_start[rw]; nr_slices = time_elapsed / throtl_slice; -- cgit v0.10.2 From 04a6b516cdc6efc2500b52a540cf65be8c5aaf9e Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Wed, 1 Dec 2010 19:34:52 +0100 Subject: blk-throttle: Correct the placement of smp_rmb() o I was discussing what are the variable being updated without spin lock and why do we need barriers and Oleg pointed out that location of smp_rmb() should be between read of td->limits_changed and tg->limits_changed. This patch fixes it. o Following is one possible sequence of events. Say cpu0 is executing throtl_update_blkio_group_read_bps() and cpu1 is executing throtl_process_limit_change(). cpu0 cpu1 tg->limits_changed = true; smp_mb__before_atomic_inc(); atomic_inc(&td->limits_changed); if (!atomic_read(&td->limits_changed)) return; if (tg->limits_changed) do_something; If cpu0 has updated tg->limits_changed and td->limits_changed, we want to make sure that if update to td->limits_changed is visible on cpu1, then update to tg->limits_changed should also be visible. Oleg pointed out to ensure that we need to insert an smp_rmb() between td->limits_changed read and tg->limits_changed read. o I had erroneously put smp_rmb() before atomic_read(&td->limits_changed). This patch fixes it. Reported-by: Oleg Nesterov Signed-off-by: Vivek Goyal Signed-off-by: Jens Axboe diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 2d134b7..381b09b 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -725,26 +725,21 @@ static void throtl_process_limit_change(struct throtl_data *td) struct throtl_grp *tg; struct hlist_node *pos, *n; - /* - * Make sure atomic_inc() effects from - * throtl_update_blkio_group_read_bps(), group of functions are - * visible. - * Is this required or smp_mb__after_atomic_inc() was suffcient - * after the atomic_inc(). - */ - smp_rmb(); if (!atomic_read(&td->limits_changed)) return; throtl_log(td, "limit changed =%d", atomic_read(&td->limits_changed)); - hlist_for_each_entry_safe(tg, pos, n, &td->tg_list, tg_node) { - /* - * Do I need an smp_rmb() here to make sure tg->limits_changed - * update is visible. I am relying on smp_rmb() at the - * beginning of function and not putting a new one here. - */ + /* + * Make sure updates from throtl_update_blkio_group_read_bps() group + * of functions to tg->limits_changed are visible. We do not + * want update td->limits_changed to be visible but update to + * tg->limits_changed not being visible yet on this cpu. Hence + * the read barrier. + */ + smp_rmb(); + hlist_for_each_entry_safe(tg, pos, n, &td->tg_list, tg_node) { if (throtl_tg_on_rr(tg) && tg->limits_changed) { throtl_log_tg(td, tg, "limit change rbps=%llu wbps=%llu" " riops=%u wiops=%u", tg->bps[READ], -- cgit v0.10.2 From 32958fdd1663aeaa23b5edbfbb0db684ffd4e20e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 09:36:23 -0300 Subject: [media] BKL: trivial BKL removal from V4L2 radio drivers The patch converts a bunch of V4L2 radio drivers to unlocked_ioctl. These are all simple conversions: most already had a lock and so the ioctl fop could simply be replaced by unlocked_ioctl. radio-miropcm20.c was converted to use the new V4L2 core lock. While doing this work I noticed that many of these drivers initialized some more fields or muted audio or something like that *after* creating the device node. This should be done before the device node is created to prevent problems. Especially hal tends to grab a device node as soon as it is created. In one or two cases the mutex_init was even done after the device creation! Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-aimslab.c b/drivers/media/radio/radio-aimslab.c index 5bf4985..05e832f 100644 --- a/drivers/media/radio/radio-aimslab.c +++ b/drivers/media/radio/radio-aimslab.c @@ -361,7 +361,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations rtrack_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops rtrack_ioctl_ops = { @@ -412,13 +412,6 @@ static int __init rtrack_init(void) rt->vdev.release = video_device_release_empty; video_set_drvdata(&rt->vdev, rt); - if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { - v4l2_device_unregister(&rt->v4l2_dev); - release_region(rt->io, 2); - return -EINVAL; - } - v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n"); - /* Set up the I/O locking */ mutex_init(&rt->lock); @@ -430,6 +423,13 @@ static int __init rtrack_init(void) sleep_delay(2000000); /* make sure it's totally down */ outb(0xc0, rt->io); /* steady volume, mute card */ + if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { + v4l2_device_unregister(&rt->v4l2_dev); + release_region(rt->io, 2); + return -EINVAL; + } + v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n"); + return 0; } diff --git a/drivers/media/radio/radio-aztech.c b/drivers/media/radio/radio-aztech.c index c223113..dd8a6ab 100644 --- a/drivers/media/radio/radio-aztech.c +++ b/drivers/media/radio/radio-aztech.c @@ -324,7 +324,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv, static const struct v4l2_file_operations aztech_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops aztech_ioctl_ops = { @@ -375,6 +375,8 @@ static int __init aztech_init(void) az->vdev.ioctl_ops = &aztech_ioctl_ops; az->vdev.release = video_device_release_empty; video_set_drvdata(&az->vdev, az); + /* mute card - prevents noisy bootups */ + outb(0, az->io); if (video_register_device(&az->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(v4l2_dev); @@ -383,8 +385,6 @@ static int __init aztech_init(void) } v4l2_info(v4l2_dev, "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n"); - /* mute card - prevents noisy bootups */ - outb(0, az->io); return 0; } diff --git a/drivers/media/radio/radio-gemtek-pci.c b/drivers/media/radio/radio-gemtek-pci.c index 7903967..28fa85b 100644 --- a/drivers/media/radio/radio-gemtek-pci.c +++ b/drivers/media/radio/radio-gemtek-pci.c @@ -361,7 +361,7 @@ MODULE_DEVICE_TABLE(pci, gemtek_pci_id); static const struct v4l2_file_operations gemtek_pci_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops gemtek_pci_ioctl_ops = { @@ -422,11 +422,11 @@ static int __devinit gemtek_pci_probe(struct pci_dev *pdev, const struct pci_dev card->vdev.release = video_device_release_empty; video_set_drvdata(&card->vdev, card); + gemtek_pci_mute(card); + if (video_register_device(&card->vdev, VFL_TYPE_RADIO, nr_radio) < 0) goto err_video; - gemtek_pci_mute(card); - v4l2_info(v4l2_dev, "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n", pdev->revision, card->iobase, card->iobase + card->length - 1); diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c index 73985f6..2599364 100644 --- a/drivers/media/radio/radio-gemtek.c +++ b/drivers/media/radio/radio-gemtek.c @@ -378,7 +378,7 @@ static int gemtek_probe(struct gemtek *gt) static const struct v4l2_file_operations gemtek_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static int vidioc_querycap(struct file *file, void *priv, @@ -577,12 +577,6 @@ static int __init gemtek_init(void) gt->vdev.release = video_device_release_empty; video_set_drvdata(>->vdev, gt); - if (video_register_device(>->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { - v4l2_device_unregister(v4l2_dev); - release_region(gt->io, 1); - return -EBUSY; - } - /* Set defaults */ gt->lastfreq = GEMTEK_LOWFREQ; gt->bu2614data = 0; @@ -590,6 +584,12 @@ static int __init gemtek_init(void) if (initmute) gemtek_mute(gt); + if (video_register_device(>->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { + v4l2_device_unregister(v4l2_dev); + release_region(gt->io, 1); + return -EBUSY; + } + return 0; } diff --git a/drivers/media/radio/radio-maestro.c b/drivers/media/radio/radio-maestro.c index 08f1051..6af61bf 100644 --- a/drivers/media/radio/radio-maestro.c +++ b/drivers/media/radio/radio-maestro.c @@ -299,7 +299,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations maestro_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops maestro_ioctl_ops = { @@ -383,22 +383,20 @@ static int __devinit maestro_probe(struct pci_dev *pdev, dev->vdev.release = video_device_release_empty; video_set_drvdata(&dev->vdev, dev); + if (!radio_power_on(dev)) { + retval = -EIO; + goto errfr1; + } + retval = video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr); if (retval) { v4l2_err(v4l2_dev, "can't register video device!\n"); goto errfr1; } - if (!radio_power_on(dev)) { - retval = -EIO; - goto errunr; - } - v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n"); return 0; -errunr: - video_unregister_device(&dev->vdev); errfr1: v4l2_device_unregister(v4l2_dev); errfr: diff --git a/drivers/media/radio/radio-maxiradio.c b/drivers/media/radio/radio-maxiradio.c index 255d40d..6459a22 100644 --- a/drivers/media/radio/radio-maxiradio.c +++ b/drivers/media/radio/radio-maxiradio.c @@ -346,7 +346,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv, static const struct v4l2_file_operations maxiradio_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = { diff --git a/drivers/media/radio/radio-miropcm20.c b/drivers/media/radio/radio-miropcm20.c index 4ff8854..3fb76e3 100644 --- a/drivers/media/radio/radio-miropcm20.c +++ b/drivers/media/radio/radio-miropcm20.c @@ -33,6 +33,7 @@ struct pcm20 { unsigned long freq; int muted; struct snd_miro_aci *aci; + struct mutex lock; }; static struct pcm20 pcm20_card = { @@ -72,7 +73,7 @@ static int pcm20_setfreq(struct pcm20 *dev, unsigned long freq) static const struct v4l2_file_operations pcm20_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static int vidioc_querycap(struct file *file, void *priv, @@ -229,7 +230,7 @@ static int __init pcm20_init(void) return -ENODEV; } strlcpy(v4l2_dev->name, "miropcm20", sizeof(v4l2_dev->name)); - + mutex_init(&dev->lock); res = v4l2_device_register(NULL, v4l2_dev); if (res < 0) { @@ -242,6 +243,7 @@ static int __init pcm20_init(void) dev->vdev.fops = &pcm20_fops; dev->vdev.ioctl_ops = &pcm20_ioctl_ops; dev->vdev.release = video_device_release_empty; + dev->vdev.lock = &dev->lock; video_set_drvdata(&dev->vdev, dev); if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) diff --git a/drivers/media/radio/radio-rtrack2.c b/drivers/media/radio/radio-rtrack2.c index a79296a..8d6ea59 100644 --- a/drivers/media/radio/radio-rtrack2.c +++ b/drivers/media/radio/radio-rtrack2.c @@ -266,7 +266,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations rtrack2_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = { @@ -315,6 +315,10 @@ static int __init rtrack2_init(void) dev->vdev.release = video_device_release_empty; video_set_drvdata(&dev->vdev, dev); + /* mute card - prevents noisy bootups */ + outb(1, dev->io); + dev->muted = 1; + mutex_init(&dev->lock); if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(v4l2_dev); @@ -324,10 +328,6 @@ static int __init rtrack2_init(void) v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n"); - /* mute card - prevents noisy bootups */ - outb(1, dev->io); - dev->muted = 1; - return 0; } diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c index 985359d..b5a5f89 100644 --- a/drivers/media/radio/radio-sf16fmi.c +++ b/drivers/media/radio/radio-sf16fmi.c @@ -260,7 +260,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations fmi_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops fmi_ioctl_ops = { @@ -382,6 +382,9 @@ static int __init fmi_init(void) mutex_init(&fmi->lock); + /* mute card - prevents noisy bootups */ + fmi_mute(fmi); + if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(v4l2_dev); release_region(fmi->io, 2); @@ -391,8 +394,6 @@ static int __init fmi_init(void) } v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io); - /* mute card - prevents noisy bootups */ - fmi_mute(fmi); return 0; } diff --git a/drivers/media/radio/radio-sf16fmr2.c b/drivers/media/radio/radio-sf16fmr2.c index 52c7bbb..dc3f04c 100644 --- a/drivers/media/radio/radio-sf16fmr2.c +++ b/drivers/media/radio/radio-sf16fmr2.c @@ -376,7 +376,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations fmr2_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops fmr2_ioctl_ops = { @@ -424,6 +424,10 @@ static int __init fmr2_init(void) fmr2->vdev.release = video_device_release_empty; video_set_drvdata(&fmr2->vdev, fmr2); + /* mute card - prevents noisy bootups */ + fmr2_mute(fmr2->io); + fmr2_product_info(fmr2); + if (video_register_device(&fmr2->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(v4l2_dev); release_region(fmr2->io, 2); @@ -431,11 +435,6 @@ static int __init fmr2_init(void) } v4l2_info(v4l2_dev, "SF16FMR2 radio card driver at 0x%x.\n", fmr2->io); - /* mute card - prevents noisy bootups */ - mutex_lock(&fmr2->lock); - fmr2_mute(fmr2->io); - fmr2_product_info(fmr2); - mutex_unlock(&fmr2->lock); debug_print((KERN_DEBUG "card_type %d\n", fmr2->card_type)); return 0; } diff --git a/drivers/media/radio/radio-terratec.c b/drivers/media/radio/radio-terratec.c index fc1c860..a326639 100644 --- a/drivers/media/radio/radio-terratec.c +++ b/drivers/media/radio/radio-terratec.c @@ -338,7 +338,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations terratec_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops terratec_ioctl_ops = { @@ -389,6 +389,9 @@ static int __init terratec_init(void) mutex_init(&tt->lock); + /* mute card - prevents noisy bootups */ + tt_write_vol(tt, 0); + if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(&tt->v4l2_dev); release_region(tt->io, 2); @@ -396,9 +399,6 @@ static int __init terratec_init(void) } v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n"); - - /* mute card - prevents noisy bootups */ - tt_write_vol(tt, 0); return 0; } diff --git a/drivers/media/radio/radio-trust.c b/drivers/media/radio/radio-trust.c index 9d6dcf8..22fa9cc 100644 --- a/drivers/media/radio/radio-trust.c +++ b/drivers/media/radio/radio-trust.c @@ -344,7 +344,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations trust_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops trust_ioctl_ops = { @@ -396,14 +396,6 @@ static int __init trust_init(void) tr->vdev.release = video_device_release_empty; video_set_drvdata(&tr->vdev, tr); - if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { - v4l2_device_unregister(v4l2_dev); - release_region(tr->io, 2); - return -EINVAL; - } - - v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n"); - write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ @@ -418,6 +410,14 @@ static int __init trust_init(void) /* mute card - prevents noisy bootups */ tr_setmute(tr, 1); + if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { + v4l2_device_unregister(v4l2_dev); + release_region(tr->io, 2); + return -EINVAL; + } + + v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n"); + return 0; } diff --git a/drivers/media/radio/radio-zoltrix.c b/drivers/media/radio/radio-zoltrix.c index f31eab9..af99c5b 100644 --- a/drivers/media/radio/radio-zoltrix.c +++ b/drivers/media/radio/radio-zoltrix.c @@ -377,7 +377,7 @@ static int vidioc_s_audio(struct file *file, void *priv, static const struct v4l2_file_operations zoltrix_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops zoltrix_ioctl_ops = { @@ -424,20 +424,6 @@ static int __init zoltrix_init(void) return res; } - strlcpy(zol->vdev.name, v4l2_dev->name, sizeof(zol->vdev.name)); - zol->vdev.v4l2_dev = v4l2_dev; - zol->vdev.fops = &zoltrix_fops; - zol->vdev.ioctl_ops = &zoltrix_ioctl_ops; - zol->vdev.release = video_device_release_empty; - video_set_drvdata(&zol->vdev, zol); - - if (video_register_device(&zol->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { - v4l2_device_unregister(v4l2_dev); - release_region(zol->io, 2); - return -EINVAL; - } - v4l2_info(v4l2_dev, "Zoltrix Radio Plus card driver.\n"); - mutex_init(&zol->lock); /* mute card - prevents noisy bootups */ @@ -452,6 +438,20 @@ static int __init zoltrix_init(void) zol->curvol = 0; zol->stereo = 1; + strlcpy(zol->vdev.name, v4l2_dev->name, sizeof(zol->vdev.name)); + zol->vdev.v4l2_dev = v4l2_dev; + zol->vdev.fops = &zoltrix_fops; + zol->vdev.ioctl_ops = &zoltrix_ioctl_ops; + zol->vdev.release = video_device_release_empty; + video_set_drvdata(&zol->vdev, zol); + + if (video_register_device(&zol->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { + v4l2_device_unregister(v4l2_dev); + release_region(zol->io, 2); + return -EINVAL; + } + v4l2_info(v4l2_dev, "Zoltrix Radio Plus card driver.\n"); + return 0; } -- cgit v0.10.2 From 1cccee0b84e3445a142d0e9edcbf66b677b2e7e5 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 09:43:52 -0300 Subject: [media] cadet: use unlocked_ioctl Converted from ioctl to unlocked_ioctl. This driver already used an internal lock, but it was missing in cadet_open and cadet_release and it was not used correctly in cadet_read. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-cadet.c b/drivers/media/radio/radio-cadet.c index b701ea6..bc9ad08 100644 --- a/drivers/media/radio/radio-cadet.c +++ b/drivers/media/radio/radio-cadet.c @@ -328,11 +328,10 @@ static ssize_t cadet_read(struct file *file, char __user *data, size_t count, lo unsigned char readbuf[RDS_BUFFER]; int i = 0; + mutex_lock(&dev->lock); if (dev->rdsstat == 0) { - mutex_lock(&dev->lock); dev->rdsstat = 1; outb(0x80, dev->io); /* Select RDS fifo */ - mutex_unlock(&dev->lock); init_timer(&dev->readtimer); dev->readtimer.function = cadet_handler; dev->readtimer.data = (unsigned long)dev; @@ -340,12 +339,15 @@ static ssize_t cadet_read(struct file *file, char __user *data, size_t count, lo add_timer(&dev->readtimer); } if (dev->rdsin == dev->rdsout) { + mutex_unlock(&dev->lock); if (file->f_flags & O_NONBLOCK) return -EWOULDBLOCK; interruptible_sleep_on(&dev->read_queue); + mutex_lock(&dev->lock); } while (i < count && dev->rdsin != dev->rdsout) readbuf[i++] = dev->rdsbuf[dev->rdsout++]; + mutex_unlock(&dev->lock); if (copy_to_user(data, readbuf, i)) return -EFAULT; @@ -525,9 +527,11 @@ static int cadet_open(struct file *file) { struct cadet *dev = video_drvdata(file); + mutex_lock(&dev->lock); dev->users++; if (1 == dev->users) init_waitqueue_head(&dev->read_queue); + mutex_unlock(&dev->lock); return 0; } @@ -535,11 +539,13 @@ static int cadet_release(struct file *file) { struct cadet *dev = video_drvdata(file); + mutex_lock(&dev->lock); dev->users--; if (0 == dev->users) { del_timer_sync(&dev->readtimer); dev->rdsstat = 0; } + mutex_unlock(&dev->lock); return 0; } @@ -559,7 +565,7 @@ static const struct v4l2_file_operations cadet_fops = { .open = cadet_open, .release = cadet_release, .read = cadet_read, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .poll = cadet_poll, }; -- cgit v0.10.2 From ee71e42321cced11fecb989d743ad9cdb0c384ea Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 09:46:23 -0300 Subject: [media] tea5764: convert to unlocked_ioctl Convert from ioctl to unlocked_ioctl using the v4l2 core lock. Also removed the 'exclusive access' limitation. There was no need for it and it violates the v4l2 spec as well. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-tea5764.c b/drivers/media/radio/radio-tea5764.c index 789d2ec..0e71d81 100644 --- a/drivers/media/radio/radio-tea5764.c +++ b/drivers/media/radio/radio-tea5764.c @@ -142,7 +142,6 @@ struct tea5764_device { struct video_device *videodev; struct tea5764_regs regs; struct mutex mutex; - int users; }; /* I2C code related */ @@ -458,41 +457,10 @@ static int vidioc_s_audio(struct file *file, void *priv, return 0; } -static int tea5764_open(struct file *file) -{ - /* Currently we support only one device */ - struct tea5764_device *radio = video_drvdata(file); - - mutex_lock(&radio->mutex); - /* Only exclusive access */ - if (radio->users) { - mutex_unlock(&radio->mutex); - return -EBUSY; - } - radio->users++; - mutex_unlock(&radio->mutex); - file->private_data = radio; - return 0; -} - -static int tea5764_close(struct file *file) -{ - struct tea5764_device *radio = video_drvdata(file); - - if (!radio) - return -ENODEV; - mutex_lock(&radio->mutex); - radio->users--; - mutex_unlock(&radio->mutex); - return 0; -} - /* File system interface */ static const struct v4l2_file_operations tea5764_fops = { .owner = THIS_MODULE, - .open = tea5764_open, - .release = tea5764_close, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops tea5764_ioctl_ops = { @@ -527,7 +495,7 @@ static int __devinit tea5764_i2c_probe(struct i2c_client *client, int ret; PDEBUG("probe"); - radio = kmalloc(sizeof(struct tea5764_device), GFP_KERNEL); + radio = kzalloc(sizeof(struct tea5764_device), GFP_KERNEL); if (!radio) return -ENOMEM; @@ -555,12 +523,7 @@ static int __devinit tea5764_i2c_probe(struct i2c_client *client, i2c_set_clientdata(client, radio); video_set_drvdata(radio->videodev, radio); - - ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); - if (ret < 0) { - PWARN("Could not register video device!"); - goto errrel; - } + radio->videodev->lock = &radio->mutex; /* initialize and power off the chip */ tea5764_i2c_read(radio); @@ -568,6 +531,12 @@ static int __devinit tea5764_i2c_probe(struct i2c_client *client, tea5764_mute(radio, 1); tea5764_power_down(radio); + ret = video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr); + if (ret < 0) { + PWARN("Could not register video device!"); + goto errrel; + } + PINFO("registered."); return 0; errrel: -- cgit v0.10.2 From 725ea8cf1c1f5ba53177d20d2d2f6dbc139b643e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 09:48:24 -0300 Subject: [media] si4713: convert to unlocked_ioctl Convert ioctl to unlocked_ioctl. Note that for this driver the locking is done inside the sub-device. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-si4713.c b/drivers/media/radio/radio-si4713.c index 6a43578..3a84c3d 100644 --- a/drivers/media/radio/radio-si4713.c +++ b/drivers/media/radio/radio-si4713.c @@ -53,7 +53,8 @@ struct radio_si4713_device { /* radio_si4713_fops - file operations interface */ static const struct v4l2_file_operations radio_si4713_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + /* Note: locking is done at the subdev level in the i2c driver. */ + .unlocked_ioctl = video_ioctl2, }; /* Video4Linux Interface */ -- cgit v0.10.2 From d2c998f7453af7ad416bc38d09ae9d453d2fac5e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 09:49:34 -0300 Subject: [media] typhoon: convert to unlocked_ioctl Convert the typhoon driver from ioctl to unlocked_ioctl. When doing this I noticed a bug where curfreq was not initialized correctly to mutefreq (it wasn't multiplied by 16). The initialization is now also done before the device node is created. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-typhoon.c b/drivers/media/radio/radio-typhoon.c index b1f6305..8dbbf08 100644 --- a/drivers/media/radio/radio-typhoon.c +++ b/drivers/media/radio/radio-typhoon.c @@ -317,7 +317,7 @@ static int vidioc_log_status(struct file *file, void *priv) static const struct v4l2_file_operations typhoon_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops typhoon_ioctl_ops = { @@ -344,18 +344,18 @@ static int __init typhoon_init(void) strlcpy(v4l2_dev->name, "typhoon", sizeof(v4l2_dev->name)); dev->io = io; - dev->curfreq = dev->mutefreq = mutefreq; if (dev->io == -1) { v4l2_err(v4l2_dev, "You must set an I/O address with io=0x316 or io=0x336\n"); return -EINVAL; } - if (dev->mutefreq < 87000 || dev->mutefreq > 108500) { + if (mutefreq < 87000 || mutefreq > 108500) { v4l2_err(v4l2_dev, "You must set a frequency (in kHz) used when muting the card,\n"); v4l2_err(v4l2_dev, "e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n"); return -EINVAL; } + dev->curfreq = dev->mutefreq = mutefreq << 4; mutex_init(&dev->lock); if (!request_region(dev->io, 8, "typhoon")) { @@ -378,17 +378,17 @@ static int __init typhoon_init(void) dev->vdev.ioctl_ops = &typhoon_ioctl_ops; dev->vdev.release = video_device_release_empty; video_set_drvdata(&dev->vdev, dev); + + /* mute card - prevents noisy bootups */ + typhoon_mute(dev); + if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { v4l2_device_unregister(&dev->v4l2_dev); release_region(dev->io, 8); return -EINVAL; } v4l2_info(v4l2_dev, "port 0x%x.\n", dev->io); - v4l2_info(v4l2_dev, "mute frequency is %lu kHz.\n", dev->mutefreq); - dev->mutefreq <<= 4; - - /* mute card - prevents noisy bootups */ - typhoon_mute(dev); + v4l2_info(v4l2_dev, "mute frequency is %lu kHz.\n", mutefreq); return 0; } -- cgit v0.10.2 From 61df3c9b3fe6a7e47d25b27ae4df0ecdb07b8fbd Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 10:09:38 -0300 Subject: [media] BKL: trivial ioctl -> unlocked_ioctl video driver conversions These drivers could be trivially converted to unlocked_ioctl since they already did locking. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/arv.c b/drivers/media/video/arv.c index 31e7a12..f989f28 100644 --- a/drivers/media/video/arv.c +++ b/drivers/media/video/arv.c @@ -712,7 +712,7 @@ static int ar_initialize(struct ar *ar) static const struct v4l2_file_operations ar_fops = { .owner = THIS_MODULE, .read = ar_read, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops ar_ioctl_ops = { diff --git a/drivers/media/video/bw-qcam.c b/drivers/media/video/bw-qcam.c index 935e0c9..c119350 100644 --- a/drivers/media/video/bw-qcam.c +++ b/drivers/media/video/bw-qcam.c @@ -860,7 +860,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf, static const struct v4l2_file_operations qcam_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = qcam_read, }; diff --git a/drivers/media/video/c-qcam.c b/drivers/media/video/c-qcam.c index 6e4b196..24fc009 100644 --- a/drivers/media/video/c-qcam.c +++ b/drivers/media/video/c-qcam.c @@ -718,7 +718,7 @@ static ssize_t qcam_read(struct file *file, char __user *buf, static const struct v4l2_file_operations qcam_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = qcam_read, }; diff --git a/drivers/media/video/meye.c b/drivers/media/video/meye.c index 2be23bc..48d2c24 100644 --- a/drivers/media/video/meye.c +++ b/drivers/media/video/meye.c @@ -1659,7 +1659,7 @@ static const struct v4l2_file_operations meye_fops = { .open = meye_open, .release = meye_release, .mmap = meye_mmap, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .poll = meye_poll, }; @@ -1831,12 +1831,6 @@ static int __devinit meye_probe(struct pci_dev *pcidev, msleep(1); mchip_set(MCHIP_MM_INTA, MCHIP_MM_INTA_HIC_1_MASK); - if (video_register_device(meye.vdev, VFL_TYPE_GRABBER, - video_nr) < 0) { - v4l2_err(v4l2_dev, "video_register_device failed\n"); - goto outvideoreg; - } - mutex_init(&meye.lock); init_waitqueue_head(&meye.proc_list); meye.brightness = 32 << 10; @@ -1858,6 +1852,12 @@ static int __devinit meye_probe(struct pci_dev *pcidev, sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAPICTURE, 0); sony_pic_camera_command(SONY_PIC_COMMAND_SETCAMERAAGC, 48); + if (video_register_device(meye.vdev, VFL_TYPE_GRABBER, + video_nr) < 0) { + v4l2_err(v4l2_dev, "video_register_device failed\n"); + goto outvideoreg; + } + v4l2_info(v4l2_dev, "Motion Eye Camera Driver v%s.\n", MEYE_DRIVER_VERSION); v4l2_info(v4l2_dev, "mchip KL5A72002 rev. %d, base %lx, irq %d\n", diff --git a/drivers/media/video/pms.c b/drivers/media/video/pms.c index 7129b50..7551907 100644 --- a/drivers/media/video/pms.c +++ b/drivers/media/video/pms.c @@ -932,7 +932,7 @@ static ssize_t pms_read(struct file *file, char __user *buf, static const struct v4l2_file_operations pms_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = pms_read, }; diff --git a/drivers/media/video/w9966.c b/drivers/media/video/w9966.c index 635420d..019ee20 100644 --- a/drivers/media/video/w9966.c +++ b/drivers/media/video/w9966.c @@ -815,7 +815,7 @@ out: static const struct v4l2_file_operations w9966_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .read = w9966_v4l_read, }; -- cgit v0.10.2 From feecf93d6b16887bf7e12fcc604bfba9048b2fa5 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 11:13:39 -0300 Subject: [media] sn9c102: convert to unlocked_ioctl Trivial conversion, this driver used a mutex already. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/sn9c102/sn9c102_core.c b/drivers/media/video/sn9c102/sn9c102_core.c index 28e19da..f49fbfb 100644 --- a/drivers/media/video/sn9c102/sn9c102_core.c +++ b/drivers/media/video/sn9c102/sn9c102_core.c @@ -3238,7 +3238,7 @@ static const struct v4l2_file_operations sn9c102_fops = { .owner = THIS_MODULE, .open = sn9c102_open, .release = sn9c102_release, - .ioctl = sn9c102_ioctl, + .unlocked_ioctl = sn9c102_ioctl, .read = sn9c102_read, .poll = sn9c102_poll, .mmap = sn9c102_mmap, -- cgit v0.10.2 From ca2621963de3934613f8aa63e19c03b1751707ae Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 11:17:00 -0300 Subject: [media] et61x251_core: trivial conversion to unlocked_ioctl Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/et61x251/et61x251_core.c b/drivers/media/video/et61x251/et61x251_core.c index a5cfc76..bb16409 100644 --- a/drivers/media/video/et61x251/et61x251_core.c +++ b/drivers/media/video/et61x251/et61x251_core.c @@ -2530,7 +2530,7 @@ static const struct v4l2_file_operations et61x251_fops = { .owner = THIS_MODULE, .open = et61x251_open, .release = et61x251_release, - .ioctl = et61x251_ioctl, + .unlocked_ioctl = et61x251_ioctl, .read = et61x251_read, .poll = et61x251_poll, .mmap = et61x251_mmap, -- cgit v0.10.2 From 20aa5bb9dc4b5aba1b4d0f15aa92c4e83721a343 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sun, 14 Nov 2010 13:09:21 -0300 Subject: [media] cafe_ccic: replace ioctl by unlocked_ioctl Trivial change, approved by Jonathan Corbet . Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/cafe_ccic.c b/drivers/media/video/cafe_ccic.c index 7bc3667..8e6634c 100644 --- a/drivers/media/video/cafe_ccic.c +++ b/drivers/media/video/cafe_ccic.c @@ -1775,7 +1775,7 @@ static const struct v4l2_file_operations cafe_v4l_fops = { .read = cafe_v4l_read, .poll = cafe_v4l_poll, .mmap = cafe_v4l_mmap, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static const struct v4l2_ioctl_ops cafe_v4l_ioctl_ops = { -- cgit v0.10.2 From 697566939dc60048fca6e6dd69c7e089aaeb7ff8 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 16 Nov 2010 18:12:16 -0300 Subject: [media] sh_vou: convert to unlocked_ioctl Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/sh_vou.c b/drivers/media/video/sh_vou.c index 0f49061..858b2f8 100644 --- a/drivers/media/video/sh_vou.c +++ b/drivers/media/video/sh_vou.c @@ -75,6 +75,7 @@ struct sh_vou_device { int pix_idx; struct videobuf_buffer *active; enum sh_vou_status status; + struct mutex fop_lock; }; struct sh_vou_file { @@ -235,7 +236,7 @@ static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb) vb->state = VIDEOBUF_NEEDS_INIT; } -/* Locking: caller holds vq->vb_lock mutex */ +/* Locking: caller holds fop_lock mutex */ static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) { @@ -257,7 +258,7 @@ static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count, return 0; } -/* Locking: caller holds vq->vb_lock mutex */ +/* Locking: caller holds fop_lock mutex */ static int sh_vou_buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, enum v4l2_field field) @@ -306,7 +307,7 @@ static int sh_vou_buf_prepare(struct videobuf_queue *vq, return 0; } -/* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */ +/* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */ static void sh_vou_buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) { @@ -1190,7 +1191,7 @@ static int sh_vou_open(struct file *file) V4L2_BUF_TYPE_VIDEO_OUTPUT, V4L2_FIELD_NONE, sizeof(struct videobuf_buffer), vdev, - NULL); + &vou_dev->fop_lock); return 0; } @@ -1292,7 +1293,7 @@ static const struct v4l2_file_operations sh_vou_fops = { .owner = THIS_MODULE, .open = sh_vou_open, .release = sh_vou_release, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .mmap = sh_vou_mmap, .poll = sh_vou_poll, }; @@ -1331,6 +1332,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev) INIT_LIST_HEAD(&vou_dev->queue); spin_lock_init(&vou_dev->lock); + mutex_init(&vou_dev->fop_lock); atomic_set(&vou_dev->use_count, 0); vou_dev->pdata = vou_pdata; vou_dev->status = SH_VOU_IDLE; @@ -1388,6 +1390,7 @@ static int __devinit sh_vou_probe(struct platform_device *pdev) vdev->tvnorms |= V4L2_STD_PAL; vdev->v4l2_dev = &vou_dev->v4l2_dev; vdev->release = video_device_release; + vdev->lock = &vou_dev->fop_lock; vou_dev->vdev = vdev; video_set_drvdata(vdev, vou_dev); -- cgit v0.10.2 From 4f68775b7dfc6115169f689a42535486bf10977e Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 16 Nov 2010 18:13:06 -0300 Subject: [media] radio-timb: convert to unlocked_ioctl MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Hans Verkuil Acked-by: Richard Röjfors Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/radio/radio-timb.c b/drivers/media/radio/radio-timb.c index b8bb3ef..a185610 100644 --- a/drivers/media/radio/radio-timb.c +++ b/drivers/media/radio/radio-timb.c @@ -34,6 +34,7 @@ struct timbradio { struct v4l2_subdev *sd_dsp; struct video_device video_dev; struct v4l2_device v4l2_dev; + struct mutex lock; }; @@ -142,7 +143,7 @@ static const struct v4l2_ioctl_ops timbradio_ioctl_ops = { static const struct v4l2_file_operations timbradio_fops = { .owner = THIS_MODULE, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, }; static int __devinit timbradio_probe(struct platform_device *pdev) @@ -164,6 +165,7 @@ static int __devinit timbradio_probe(struct platform_device *pdev) } tr->pdata = *pdata; + mutex_init(&tr->lock); strlcpy(tr->video_dev.name, "Timberdale Radio", sizeof(tr->video_dev.name)); @@ -171,6 +173,7 @@ static int __devinit timbradio_probe(struct platform_device *pdev) tr->video_dev.ioctl_ops = &timbradio_ioctl_ops; tr->video_dev.release = video_device_release_empty; tr->video_dev.minor = -1; + tr->video_dev.lock = &tr->lock; strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name)); err = v4l2_device_register(NULL, &tr->v4l2_dev); -- cgit v0.10.2 From 78b055be2710b63cb196fc37669f3b662fecc9e4 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 19 Nov 2010 17:04:31 -0300 Subject: [media] cx18: convert to unlocked_ioctl Also added locking around snd_cx18_pcm_ioctl as a precaution as requested by Andy Walls. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/cx18/cx18-alsa-pcm.c b/drivers/media/video/cx18/cx18-alsa-pcm.c index 8f55692..82d195b 100644 --- a/drivers/media/video/cx18/cx18-alsa-pcm.c +++ b/drivers/media/video/cx18/cx18-alsa-pcm.c @@ -218,7 +218,13 @@ static int snd_cx18_pcm_capture_close(struct snd_pcm_substream *substream) static int snd_cx18_pcm_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg) { - return snd_pcm_lib_ioctl(substream, cmd, arg); + struct snd_cx18_card *cxsc = snd_pcm_substream_chip(substream); + int ret; + + snd_cx18_lock(cxsc); + ret = snd_pcm_lib_ioctl(substream, cmd, arg); + snd_cx18_unlock(cxsc); + return ret; } diff --git a/drivers/media/video/cx18/cx18-streams.c b/drivers/media/video/cx18/cx18-streams.c index 9045f1e..ab461e2 100644 --- a/drivers/media/video/cx18/cx18-streams.c +++ b/drivers/media/video/cx18/cx18-streams.c @@ -41,7 +41,7 @@ static struct v4l2_file_operations cx18_v4l2_enc_fops = { .read = cx18_v4l2_read, .open = cx18_v4l2_open, /* FIXME change to video_ioctl2 if serialization lock can be removed */ - .ioctl = cx18_v4l2_ioctl, + .unlocked_ioctl = cx18_v4l2_ioctl, .release = cx18_v4l2_close, .poll = cx18_v4l2_enc_poll, }; -- cgit v0.10.2 From 2877842de8cbf6272b0a851cb12587b7dd8c2afb Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 26 Nov 2010 06:43:51 -0300 Subject: [media] v4l2-dev: use mutex_lock_interruptible instead of plain mutex_lock Where reasonable use mutex_lock_interruptible instead of mutex_lock. Also fix the poll, read and write error codes when called with an unregistered device (e.g. after a USB device was disconnected). Poll must return POLLERR|POLLHUP and read/write must return -ENODEV. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 03f7f46..bfd392e 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -186,12 +186,12 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf, size_t sz, loff_t *off) { struct video_device *vdev = video_devdata(filp); - int ret = -EIO; + int ret = -ENODEV; if (!vdev->fops->read) return -EINVAL; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->read(filp, buf, sz, off); if (vdev->lock) @@ -203,12 +203,12 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf, size_t sz, loff_t *off) { struct video_device *vdev = video_devdata(filp); - int ret = -EIO; + int ret = -ENODEV; if (!vdev->fops->write) return -EINVAL; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->write(filp, buf, sz, off); if (vdev->lock) @@ -219,10 +219,10 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf, static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll) { struct video_device *vdev = video_devdata(filp); - int ret = DEFAULT_POLLMASK; + int ret = POLLERR | POLLHUP; if (!vdev->fops->poll) - return ret; + return DEFAULT_POLLMASK; if (vdev->lock) mutex_lock(vdev->lock); if (video_is_registered(vdev)) @@ -238,8 +238,8 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) int ret = -ENODEV; if (vdev->fops->unlocked_ioctl) { - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->unlocked_ioctl(filp, cmd, arg); if (vdev->lock) @@ -265,8 +265,8 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm) if (!vdev->fops->mmap) return ret; - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->mmap(filp, vm); if (vdev->lock) @@ -292,8 +292,10 @@ static int v4l2_open(struct inode *inode, struct file *filp) video_get(vdev); mutex_unlock(&videodev_lock); if (vdev->fops->open) { - if (vdev->lock) - mutex_lock(vdev->lock); + if (vdev->lock && mutex_lock_interruptible(vdev->lock)) { + ret = -ERESTARTSYS; + goto err; + } if (video_is_registered(vdev)) ret = vdev->fops->open(filp); else @@ -302,6 +304,7 @@ static int v4l2_open(struct inode *inode, struct file *filp) mutex_unlock(vdev->lock); } +err: /* decrease the refcount in case of an error */ if (ret) video_put(vdev); -- cgit v0.10.2 From 879aa24d6394aa04b690a600a41ff500441ad384 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 26 Nov 2010 06:47:28 -0300 Subject: [media] V4L: improve the BKL replacement heuristic The BKL replacement mutex had some serious performance side-effects on V4L drivers. It is replaced by a better heuristic that works around the worst of the side-effects. Read the v4l2-dev.c comments for the whole sorry story. This is a temporary measure only until we can convert all v4l drivers to use unlocked_ioctl. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index bfd392e..6b64fd6 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -245,13 +245,38 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) if (vdev->lock) mutex_unlock(vdev->lock); } else if (vdev->fops->ioctl) { - /* TODO: convert all drivers to unlocked_ioctl */ + /* This code path is a replacement for the BKL. It is a major + * hack but it will have to do for those drivers that are not + * yet converted to use unlocked_ioctl. + * + * There are two options: if the driver implements struct + * v4l2_device, then the lock defined there is used to + * serialize the ioctls. Otherwise the v4l2 core lock defined + * below is used. This lock is really bad since it serializes + * completely independent devices. + * + * Both variants suffer from the same problem: if the driver + * sleeps, then it blocks all ioctls since the lock is still + * held. This is very common for VIDIOC_DQBUF since that + * normally waits for a frame to arrive. As a result any other + * ioctl calls will proceed very, very slowly since each call + * will have to wait for the VIDIOC_QBUF to finish. Things that + * should take 0.01s may now take 10-20 seconds. + * + * The workaround is to *not* take the lock for VIDIOC_DQBUF. + * This actually works OK for videobuf-based drivers, since + * videobuf will take its own internal lock. + */ static DEFINE_MUTEX(v4l2_ioctl_mutex); + struct mutex *m = vdev->v4l2_dev ? + &vdev->v4l2_dev->ioctl_lock : &v4l2_ioctl_mutex; - mutex_lock(&v4l2_ioctl_mutex); + if (cmd != VIDIOC_DQBUF && mutex_lock_interruptible(m)) + return -ERESTARTSYS; if (video_is_registered(vdev)) ret = vdev->fops->ioctl(filp, cmd, arg); - mutex_unlock(&v4l2_ioctl_mutex); + if (cmd != VIDIOC_DQBUF) + mutex_unlock(m); } else ret = -ENOTTY; diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c index 0b08f96..7fe6f92 100644 --- a/drivers/media/video/v4l2-device.c +++ b/drivers/media/video/v4l2-device.c @@ -35,6 +35,7 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev) INIT_LIST_HEAD(&v4l2_dev->subdevs); spin_lock_init(&v4l2_dev->lock); + mutex_init(&v4l2_dev->ioctl_lock); v4l2_dev->dev = dev; if (dev == NULL) { /* If dev == NULL, then name must be filled in by the caller */ diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h index 6648036..b16f307 100644 --- a/include/media/v4l2-device.h +++ b/include/media/v4l2-device.h @@ -51,6 +51,8 @@ struct v4l2_device { unsigned int notification, void *arg); /* The control handler. May be NULL. */ struct v4l2_ctrl_handler *ctrl_handler; + /* BKL replacement mutex. Temporary solution only. */ + struct mutex ioctl_lock; }; /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev. -- cgit v0.10.2 From ca9afe6f87b569cdf8e797395381f18ae23a2905 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Fri, 26 Nov 2010 06:54:53 -0300 Subject: [media] v4l2-dev: fix race condition The unregister function had a race condition with the v4l2_open function. Ensure that both functions test and clear the REGISTER flag from within a critical section. Thanks to Laurent Pinchart for finding this race. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index 6b64fd6..359e232 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -309,7 +309,7 @@ static int v4l2_open(struct inode *inode, struct file *filp) mutex_lock(&videodev_lock); vdev = video_devdata(filp); /* return ENODEV if the video device has already been removed. */ - if (vdev == NULL) { + if (vdev == NULL || !video_is_registered(vdev)) { mutex_unlock(&videodev_lock); return -ENODEV; } @@ -624,7 +624,12 @@ void video_unregister_device(struct video_device *vdev) if (!vdev || !video_is_registered(vdev)) return; + mutex_lock(&videodev_lock); + /* This must be in a critical section to prevent a race with v4l2_open. + * Once this bit has been cleared video_get may never be called again. + */ clear_bit(V4L2_FL_REGISTERED, &vdev->flags); + mutex_unlock(&videodev_lock); device_unregister(&vdev->dev); } EXPORT_SYMBOL(video_unregister_device); -- cgit v0.10.2 From 23d9f3ef23f0dc4bb20ccd5540b9a91ff08da08f Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 21 Nov 2010 07:58:54 -0300 Subject: [media] uvcvideo: Lock controls mutex when querying menus uvc_find_control() must be called with the controls mutex locked. Fix uvc_query_v4l2_menu() accordingly. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/uvc/uvc_ctrl.c b/drivers/media/video/uvc/uvc_ctrl.c index f169f77..59f8a9a 100644 --- a/drivers/media/video/uvc/uvc_ctrl.c +++ b/drivers/media/video/uvc/uvc_ctrl.c @@ -785,7 +785,7 @@ static void __uvc_find_control(struct uvc_entity *entity, __u32 v4l2_id, } } -struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, +static struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, __u32 v4l2_id, struct uvc_control_mapping **mapping) { struct uvc_control *ctrl = NULL; @@ -944,6 +944,52 @@ done: return ret; } +/* + * Mapping V4L2 controls to UVC controls can be straighforward if done well. + * Most of the UVC controls exist in V4L2, and can be mapped directly. Some + * must be grouped (for instance the Red Balance, Blue Balance and Do White + * Balance V4L2 controls use the White Balance Component UVC control) or + * otherwise translated. The approach we take here is to use a translation + * table for the controls that can be mapped directly, and handle the others + * manually. + */ +int uvc_query_v4l2_menu(struct uvc_video_chain *chain, + struct v4l2_querymenu *query_menu) +{ + struct uvc_menu_info *menu_info; + struct uvc_control_mapping *mapping; + struct uvc_control *ctrl; + u32 index = query_menu->index; + u32 id = query_menu->id; + int ret; + + memset(query_menu, 0, sizeof(*query_menu)); + query_menu->id = id; + query_menu->index = index; + + ret = mutex_lock_interruptible(&chain->ctrl_mutex); + if (ret < 0) + return -ERESTARTSYS; + + ctrl = uvc_find_control(chain, query_menu->id, &mapping); + if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) { + ret = -EINVAL; + goto done; + } + + if (query_menu->index >= mapping->menu_count) { + ret = -EINVAL; + goto done; + } + + menu_info = &mapping->menu_info[query_menu->index]; + strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); + +done: + mutex_unlock(&chain->ctrl_mutex); + return ret; +} + /* -------------------------------------------------------------------------- * Control transactions diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 6d15de9..0f865e9 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -101,40 +101,6 @@ done: */ /* - * Mapping V4L2 controls to UVC controls can be straighforward if done well. - * Most of the UVC controls exist in V4L2, and can be mapped directly. Some - * must be grouped (for instance the Red Balance, Blue Balance and Do White - * Balance V4L2 controls use the White Balance Component UVC control) or - * otherwise translated. The approach we take here is to use a translation - * table for the controls that can be mapped directly, and handle the others - * manually. - */ -static int uvc_v4l2_query_menu(struct uvc_video_chain *chain, - struct v4l2_querymenu *query_menu) -{ - struct uvc_menu_info *menu_info; - struct uvc_control_mapping *mapping; - struct uvc_control *ctrl; - u32 index = query_menu->index; - u32 id = query_menu->id; - - ctrl = uvc_find_control(chain, query_menu->id, &mapping); - if (ctrl == NULL || mapping->v4l2_type != V4L2_CTRL_TYPE_MENU) - return -EINVAL; - - if (query_menu->index >= mapping->menu_count) - return -EINVAL; - - memset(query_menu, 0, sizeof(*query_menu)); - query_menu->id = id; - query_menu->index = index; - - menu_info = &mapping->menu_info[query_menu->index]; - strlcpy(query_menu->name, menu_info->name, sizeof query_menu->name); - return 0; -} - -/* * Find the frame interval closest to the requested frame interval for the * given frame format and size. This should be done by the device as part of * the Video Probe and Commit negotiation, but some hardware don't implement @@ -624,7 +590,7 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) } case VIDIOC_QUERYMENU: - return uvc_v4l2_query_menu(chain, arg); + return uvc_query_v4l2_menu(chain, arg); case VIDIOC_G_EXT_CTRLS: { diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index d97cf6d..4520924 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -606,10 +606,10 @@ extern int uvc_status_suspend(struct uvc_device *dev); extern int uvc_status_resume(struct uvc_device *dev); /* Controls */ -extern struct uvc_control *uvc_find_control(struct uvc_video_chain *chain, - __u32 v4l2_id, struct uvc_control_mapping **mapping); extern int uvc_query_v4l2_ctrl(struct uvc_video_chain *chain, struct v4l2_queryctrl *v4l2_ctrl); +extern int uvc_query_v4l2_menu(struct uvc_video_chain *chain, + struct v4l2_querymenu *query_menu); extern int uvc_ctrl_add_mapping(struct uvc_video_chain *chain, const struct uvc_control_mapping *mapping); -- cgit v0.10.2 From 8e815e1763b8d4e5adf0dc14bde8c55329cf95a8 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 21 Nov 2010 14:46:44 -0300 Subject: [media] uvcvideo: Move mutex lock/unlock inside uvc_free_buffers Callers outside uvc_queue.c should not be forced to lock/unlock the queue mutex manually. Move the mutex operations inside uvc_free_buffers(). Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index ed6d544..32c1822 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -90,6 +90,39 @@ void uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type, } /* + * Free the video buffers. + * + * This function must be called with the queue lock held. + */ +static int __uvc_free_buffers(struct uvc_video_queue *queue) +{ + unsigned int i; + + for (i = 0; i < queue->count; ++i) { + if (queue->buffer[i].vma_use_count != 0) + return -EBUSY; + } + + if (queue->count) { + vfree(queue->mem); + queue->count = 0; + } + + return 0; +} + +int uvc_free_buffers(struct uvc_video_queue *queue) +{ + int ret; + + mutex_lock(&queue->mutex); + ret = __uvc_free_buffers(queue); + mutex_unlock(&queue->mutex); + + return ret; +} + +/* * Allocate the video buffers. * * Pages are reserved to make sure they will not be swapped, as they will be @@ -110,7 +143,7 @@ int uvc_alloc_buffers(struct uvc_video_queue *queue, unsigned int nbuffers, mutex_lock(&queue->mutex); - if ((ret = uvc_free_buffers(queue)) < 0) + if ((ret = __uvc_free_buffers(queue)) < 0) goto done; /* Bail out if no buffers should be allocated. */ @@ -152,28 +185,6 @@ done: } /* - * Free the video buffers. - * - * This function must be called with the queue lock held. - */ -int uvc_free_buffers(struct uvc_video_queue *queue) -{ - unsigned int i; - - for (i = 0; i < queue->count; ++i) { - if (queue->buffer[i].vma_use_count != 0) - return -EBUSY; - } - - if (queue->count) { - vfree(queue->mem); - queue->count = 0; - } - - return 0; -} - -/* * Check if buffers have been allocated. */ int uvc_queue_allocated(struct uvc_video_queue *queue) diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 0f865e9..0fd9848b 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -494,11 +494,9 @@ static int uvc_v4l2_release(struct file *file) if (uvc_has_privileges(handle)) { uvc_video_enable(stream, 0); - mutex_lock(&stream->queue.mutex); if (uvc_free_buffers(&stream->queue) < 0) uvc_printk(KERN_ERR, "uvc_v4l2_release: Unable to " "free buffers.\n"); - mutex_unlock(&stream->queue.mutex); } /* Release the file handle. */ -- cgit v0.10.2 From 4aa275975beee41fd542a0f6df8cd0fee06089bf Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 21 Nov 2010 15:18:08 -0300 Subject: [media] uvcvideo: Move mmap() handler to uvc_queue.c The mmap() implementation belongs to the video buffers queue, move it there. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/uvc/uvc_queue.c b/drivers/media/video/uvc/uvc_queue.c index 32c1822..f14581b 100644 --- a/drivers/media/video/uvc/uvc_queue.c +++ b/drivers/media/video/uvc/uvc_queue.c @@ -380,6 +380,82 @@ done: } /* + * VMA operations. + */ +static void uvc_vm_open(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count++; +} + +static void uvc_vm_close(struct vm_area_struct *vma) +{ + struct uvc_buffer *buffer = vma->vm_private_data; + buffer->vma_use_count--; +} + +static const struct vm_operations_struct uvc_vm_ops = { + .open = uvc_vm_open, + .close = uvc_vm_close, +}; + +/* + * Memory-map a video buffer. + * + * This function implements video buffers memory mapping and is intended to be + * used by the device mmap handler. + */ +int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *vma) +{ + struct uvc_buffer *uninitialized_var(buffer); + struct page *page; + unsigned long addr, start, size; + unsigned int i; + int ret = 0; + + start = vma->vm_start; + size = vma->vm_end - vma->vm_start; + + mutex_lock(&queue->mutex); + + for (i = 0; i < queue->count; ++i) { + buffer = &queue->buffer[i]; + if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) + break; + } + + if (i == queue->count || size != queue->buf_size) { + ret = -EINVAL; + goto done; + } + + /* + * VM_IO marks the area as being an mmaped region for I/O to a + * device. It also prevents the region from being core dumped. + */ + vma->vm_flags |= VM_IO; + + addr = (unsigned long)queue->mem + buffer->buf.m.offset; + while (size > 0) { + page = vmalloc_to_page((void *)addr); + if ((ret = vm_insert_page(vma, start, page)) < 0) + goto done; + + start += PAGE_SIZE; + addr += PAGE_SIZE; + size -= PAGE_SIZE; + } + + vma->vm_ops = &uvc_vm_ops; + vma->vm_private_data = buffer; + uvc_vm_open(vma); + +done: + mutex_unlock(&queue->mutex); + return ret; +} + +/* * Poll the video queue. * * This function implements video queue polling and is intended to be used by diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 0fd9848b..07dd235 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -1032,79 +1032,14 @@ static ssize_t uvc_v4l2_read(struct file *file, char __user *data, return -EINVAL; } -/* - * VMA operations. - */ -static void uvc_vm_open(struct vm_area_struct *vma) -{ - struct uvc_buffer *buffer = vma->vm_private_data; - buffer->vma_use_count++; -} - -static void uvc_vm_close(struct vm_area_struct *vma) -{ - struct uvc_buffer *buffer = vma->vm_private_data; - buffer->vma_use_count--; -} - -static const struct vm_operations_struct uvc_vm_ops = { - .open = uvc_vm_open, - .close = uvc_vm_close, -}; - static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) { struct uvc_fh *handle = file->private_data; struct uvc_streaming *stream = handle->stream; - struct uvc_video_queue *queue = &stream->queue; - struct uvc_buffer *uninitialized_var(buffer); - struct page *page; - unsigned long addr, start, size; - unsigned int i; - int ret = 0; uvc_trace(UVC_TRACE_CALLS, "uvc_v4l2_mmap\n"); - start = vma->vm_start; - size = vma->vm_end - vma->vm_start; - - mutex_lock(&queue->mutex); - - for (i = 0; i < queue->count; ++i) { - buffer = &queue->buffer[i]; - if ((buffer->buf.m.offset >> PAGE_SHIFT) == vma->vm_pgoff) - break; - } - - if (i == queue->count || size != queue->buf_size) { - ret = -EINVAL; - goto done; - } - - /* - * VM_IO marks the area as being an mmaped region for I/O to a - * device. It also prevents the region from being core dumped. - */ - vma->vm_flags |= VM_IO; - - addr = (unsigned long)queue->mem + buffer->buf.m.offset; - while (size > 0) { - page = vmalloc_to_page((void *)addr); - if ((ret = vm_insert_page(vma, start, page)) < 0) - goto done; - - start += PAGE_SIZE; - addr += PAGE_SIZE; - size -= PAGE_SIZE; - } - - vma->vm_ops = &uvc_vm_ops; - vma->vm_private_data = buffer; - uvc_vm_open(vma); - -done: - mutex_unlock(&queue->mutex); - return ret; + return uvc_queue_mmap(&stream->queue, vma); } static unsigned int uvc_v4l2_poll(struct file *file, poll_table *wait) diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index 4520924..ea893bc 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -574,6 +574,8 @@ extern int uvc_queue_enable(struct uvc_video_queue *queue, int enable); extern void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); extern struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf); +extern int uvc_queue_mmap(struct uvc_video_queue *queue, + struct vm_area_struct *vma); extern unsigned int uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, poll_table *wait); extern int uvc_queue_allocated(struct uvc_video_queue *queue); -- cgit v0.10.2 From 6947756dfcecc493062a46e77f6bf51dddb5be75 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 21 Nov 2010 13:36:34 -0300 Subject: [media] uvcvideo: Lock stream mutex when accessing format-related information The stream mutex protects access to the struct uvc_streaming ctrl, cur_format and cur_frame fields as well as to the hardware probe control. Lock it appropriately. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 07dd235..2f6dc6b 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -226,12 +226,14 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, * developers test their webcams with the Linux driver as well as with * the Windows driver). */ + mutex_lock(&stream->mutex); if (stream->dev->quirks & UVC_QUIRK_PROBE_EXTRAFIELDS) probe->dwMaxVideoFrameSize = stream->ctrl.dwMaxVideoFrameSize; /* Probe the device. */ ret = uvc_probe_video(stream, probe); + mutex_unlock(&stream->mutex); if (ret < 0) goto done; @@ -255,14 +257,21 @@ done: static int uvc_v4l2_get_format(struct uvc_streaming *stream, struct v4l2_format *fmt) { - struct uvc_format *format = stream->cur_format; - struct uvc_frame *frame = stream->cur_frame; + struct uvc_format *format; + struct uvc_frame *frame; + int ret = 0; if (fmt->type != stream->type) return -EINVAL; - if (format == NULL || frame == NULL) - return -EINVAL; + mutex_lock(&stream->mutex); + format = stream->cur_format; + frame = stream->cur_frame; + + if (format == NULL || frame == NULL) { + ret = -EINVAL; + goto done; + } fmt->fmt.pix.pixelformat = format->fcc; fmt->fmt.pix.width = frame->wWidth; @@ -273,7 +282,9 @@ static int uvc_v4l2_get_format(struct uvc_streaming *stream, fmt->fmt.pix.colorspace = format->colorspace; fmt->fmt.pix.priv = 0; - return 0; +done: + mutex_unlock(&stream->mutex); + return ret; } static int uvc_v4l2_set_format(struct uvc_streaming *stream, @@ -287,18 +298,24 @@ static int uvc_v4l2_set_format(struct uvc_streaming *stream, if (fmt->type != stream->type) return -EINVAL; - if (uvc_queue_allocated(&stream->queue)) - return -EBUSY; - ret = uvc_v4l2_try_format(stream, fmt, &probe, &format, &frame); if (ret < 0) return ret; + mutex_lock(&stream->mutex); + + if (uvc_queue_allocated(&stream->queue)) { + ret = -EBUSY; + goto done; + } + memcpy(&stream->ctrl, &probe, sizeof probe); stream->cur_format = format; stream->cur_frame = frame; - return 0; +done: + mutex_unlock(&stream->mutex); + return ret; } static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, @@ -309,7 +326,10 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, if (parm->type != stream->type) return -EINVAL; + mutex_lock(&stream->mutex); numerator = stream->ctrl.dwFrameInterval; + mutex_unlock(&stream->mutex); + denominator = 10000000; uvc_simplify_fraction(&numerator, &denominator, 8, 333); @@ -336,7 +356,6 @@ static int uvc_v4l2_get_streamparm(struct uvc_streaming *stream, static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, struct v4l2_streamparm *parm) { - struct uvc_frame *frame = stream->cur_frame; struct uvc_streaming_control probe; struct v4l2_fract timeperframe; uint32_t interval; @@ -345,28 +364,36 @@ static int uvc_v4l2_set_streamparm(struct uvc_streaming *stream, if (parm->type != stream->type) return -EINVAL; - if (uvc_queue_streaming(&stream->queue)) - return -EBUSY; - if (parm->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) timeperframe = parm->parm.capture.timeperframe; else timeperframe = parm->parm.output.timeperframe; - memcpy(&probe, &stream->ctrl, sizeof probe); interval = uvc_fraction_to_interval(timeperframe.numerator, timeperframe.denominator); - uvc_trace(UVC_TRACE_FORMAT, "Setting frame interval to %u/%u (%u).\n", timeperframe.numerator, timeperframe.denominator, interval); - probe.dwFrameInterval = uvc_try_frame_interval(frame, interval); + + mutex_lock(&stream->mutex); + + if (uvc_queue_streaming(&stream->queue)) { + mutex_unlock(&stream->mutex); + return -EBUSY; + } + + memcpy(&probe, &stream->ctrl, sizeof probe); + probe.dwFrameInterval = + uvc_try_frame_interval(stream->cur_frame, interval); /* Probe the device with the new settings. */ ret = uvc_probe_video(stream, &probe); - if (ret < 0) + if (ret < 0) { + mutex_unlock(&stream->mutex); return ret; + } memcpy(&stream->ctrl, &probe, sizeof probe); + mutex_unlock(&stream->mutex); /* Return the actual frame period. */ timeperframe.numerator = probe.dwFrameInterval; @@ -869,15 +896,17 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_CROPCAP: { struct v4l2_cropcap *ccap = arg; - struct uvc_frame *frame = stream->cur_frame; if (ccap->type != stream->type) return -EINVAL; ccap->bounds.left = 0; ccap->bounds.top = 0; - ccap->bounds.width = frame->wWidth; - ccap->bounds.height = frame->wHeight; + + mutex_lock(&stream->mutex); + ccap->bounds.width = stream->cur_frame->wWidth; + ccap->bounds.height = stream->cur_frame->wHeight; + mutex_unlock(&stream->mutex); ccap->defrect = ccap->bounds; @@ -894,8 +923,6 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) case VIDIOC_REQBUFS: { struct v4l2_requestbuffers *rb = arg; - unsigned int bufsize = - stream->ctrl.dwMaxVideoFrameSize; if (rb->type != stream->type || rb->memory != V4L2_MEMORY_MMAP) @@ -904,7 +931,10 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if ((ret = uvc_acquire_privileges(handle)) < 0) return ret; - ret = uvc_alloc_buffers(&stream->queue, rb->count, bufsize); + mutex_lock(&stream->mutex); + ret = uvc_alloc_buffers(&stream->queue, rb->count, + stream->ctrl.dwMaxVideoFrameSize); + mutex_unlock(&stream->mutex); if (ret < 0) return ret; @@ -952,7 +982,9 @@ static long uvc_v4l2_do_ioctl(struct file *file, unsigned int cmd, void *arg) if (!uvc_has_privileges(handle)) return -EBUSY; + mutex_lock(&stream->mutex); ret = uvc_video_enable(stream, 1); + mutex_unlock(&stream->mutex); if (ret < 0) return ret; break; diff --git a/drivers/media/video/uvc/uvc_video.c b/drivers/media/video/uvc/uvc_video.c index 5555f01..5673d67 100644 --- a/drivers/media/video/uvc/uvc_video.c +++ b/drivers/media/video/uvc/uvc_video.c @@ -293,8 +293,6 @@ int uvc_probe_video(struct uvc_streaming *stream, unsigned int i; int ret; - mutex_lock(&stream->mutex); - /* Perform probing. The device should adjust the requested values * according to its capabilities. However, some devices, namely the * first generation UVC Logitech webcams, don't implement the Video @@ -346,7 +344,6 @@ int uvc_probe_video(struct uvc_streaming *stream, } done: - mutex_unlock(&stream->mutex); return ret; } diff --git a/drivers/media/video/uvc/uvcvideo.h b/drivers/media/video/uvc/uvcvideo.h index ea893bc..45f01e7 100644 --- a/drivers/media/video/uvc/uvcvideo.h +++ b/drivers/media/video/uvc/uvcvideo.h @@ -436,7 +436,9 @@ struct uvc_streaming { struct uvc_streaming_control ctrl; struct uvc_format *cur_format; struct uvc_frame *cur_frame; - + /* Protect access to ctrl, cur_format, cur_frame and hardware video + * probe control. + */ struct mutex mutex; unsigned int frozen : 1; -- cgit v0.10.2 From 673eb9ff33e26ee6f4278cdab06749aef1bbef5b Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sun, 21 Nov 2010 16:54:56 -0300 Subject: [media] uvcvideo: Convert to unlocked_ioctl The uvcvideo driver now locks all ioctls correctly on its own, the BKL isn't needed anymore. Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/uvc/uvc_v4l2.c b/drivers/media/video/uvc/uvc_v4l2.c index 2f6dc6b..8cf61e8 100644 --- a/drivers/media/video/uvc/uvc_v4l2.c +++ b/drivers/media/video/uvc/uvc_v4l2.c @@ -1088,7 +1088,7 @@ const struct v4l2_file_operations uvc_fops = { .owner = THIS_MODULE, .open = uvc_v4l2_open, .release = uvc_v4l2_release, - .ioctl = uvc_v4l2_ioctl, + .unlocked_ioctl = uvc_v4l2_ioctl, .read = uvc_v4l2_read, .mmap = uvc_v4l2_mmap, .poll = uvc_v4l2_poll, -- cgit v0.10.2 From a757ee2216211278680dd8ac869aabe7b4a9970d Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Thu, 2 Dec 2010 01:57:03 -0200 Subject: [media] Don't export format_by_forcc on two different drivers Drivers should append their name on exported symbols, to avoid conflicts with allyesconfig: drivers/staging/built-in.o: In function `format_by_fourcc': /home/v4l/work_trees/linus/drivers/staging/cx25821/cx25821-video.c:96: multiple definition of `format_by_fourcc' drivers/media/built-in.o:/home/v4l/work_trees/linus/drivers/media/common/saa7146_video.c:88: first defined here Let's rename both occurences with a small shellscript: for i in drivers/staging/cx25821/*.[ch]; do sed s,format_by_fourcc,cx25821_format_by_fourcc,g <$i >a && mv a $i; done for i in drivers/media/common/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done for i in include/media/saa7146*.[ch]; do sed s,format_by_fourcc,saa7146_format_by_fourcc,g <$i >a && mv a $i; done Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/common/saa7146_hlp.c b/drivers/media/common/saa7146_hlp.c index 05bde9c..1d1d8d2 100644 --- a/drivers/media/common/saa7146_hlp.c +++ b/drivers/media/common/saa7146_hlp.c @@ -558,7 +558,7 @@ static void saa7146_set_window(struct saa7146_dev *dev, int width, int height, e static void saa7146_set_position(struct saa7146_dev *dev, int w_x, int w_y, int w_height, enum v4l2_field field, u32 pixelformat) { struct saa7146_vv *vv = dev->vv_data; - struct saa7146_format *sfmt = format_by_fourcc(dev, pixelformat); + struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev, pixelformat); int b_depth = vv->ov_fmt->depth; int b_bpl = vv->ov_fb.fmt.bytesperline; @@ -702,7 +702,7 @@ static int calculate_video_dma_grab_packed(struct saa7146_dev* dev, struct saa71 struct saa7146_vv *vv = dev->vv_data; struct saa7146_video_dma vdma1; - struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); + struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); int width = buf->fmt->width; int height = buf->fmt->height; @@ -827,7 +827,7 @@ static int calculate_video_dma_grab_planar(struct saa7146_dev* dev, struct saa71 struct saa7146_video_dma vdma2; struct saa7146_video_dma vdma3; - struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); + struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); int width = buf->fmt->width; int height = buf->fmt->height; @@ -994,7 +994,7 @@ static void program_capture_engine(struct saa7146_dev *dev, int planar) void saa7146_set_capture(struct saa7146_dev *dev, struct saa7146_buf *buf, struct saa7146_buf *next) { - struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); + struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); struct saa7146_vv *vv = dev->vv_data; u32 vdma1_prot_addr; diff --git a/drivers/media/common/saa7146_video.c b/drivers/media/common/saa7146_video.c index 741c573..d246910 100644 --- a/drivers/media/common/saa7146_video.c +++ b/drivers/media/common/saa7146_video.c @@ -84,7 +84,7 @@ static struct saa7146_format formats[] = { static int NUM_FORMATS = sizeof(formats)/sizeof(struct saa7146_format); -struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc) +struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc) { int i, j = NUM_FORMATS; @@ -266,7 +266,7 @@ static int saa7146_pgtable_build(struct saa7146_dev *dev, struct saa7146_buf *bu struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb); struct scatterlist *list = dma->sglist; int length = dma->sglen; - struct saa7146_format *sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); + struct saa7146_format *sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); DEB_EE(("dev:%p, buf:%p, sg_len:%d\n",dev,buf,length)); @@ -408,7 +408,7 @@ static int video_begin(struct saa7146_fh *fh) } } - fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); + fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat); /* we need to have a valid format set here */ BUG_ON(NULL == fmt); @@ -460,7 +460,7 @@ static int video_end(struct saa7146_fh *fh, struct file *file) return -EBUSY; } - fmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); + fmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat); /* we need to have a valid format set here */ BUG_ON(NULL == fmt); @@ -536,7 +536,7 @@ static int vidioc_s_fbuf(struct file *file, void *fh, struct v4l2_framebuffer *f return -EPERM; /* check args */ - fmt = format_by_fourcc(dev, fb->fmt.pixelformat); + fmt = saa7146_format_by_fourcc(dev, fb->fmt.pixelformat); if (NULL == fmt) return -EINVAL; @@ -760,7 +760,7 @@ static int vidioc_try_fmt_vid_cap(struct file *file, void *fh, struct v4l2_forma DEB_EE(("V4L2_BUF_TYPE_VIDEO_CAPTURE: dev:%p, fh:%p\n", dev, fh)); - fmt = format_by_fourcc(dev, f->fmt.pix.pixelformat); + fmt = saa7146_format_by_fourcc(dev, f->fmt.pix.pixelformat); if (NULL == fmt) return -EINVAL; @@ -1264,7 +1264,7 @@ static int buffer_prepare(struct videobuf_queue *q, buf->fmt = &fh->video_fmt; buf->vb.field = fh->video_fmt.field; - sfmt = format_by_fourcc(dev,buf->fmt->pixelformat); + sfmt = saa7146_format_by_fourcc(dev,buf->fmt->pixelformat); release_all_pagetables(dev, buf); if( 0 != IS_PLANAR(sfmt->trans)) { @@ -1378,7 +1378,7 @@ static int video_open(struct saa7146_dev *dev, struct file *file) fh->video_fmt.pixelformat = V4L2_PIX_FMT_BGR24; fh->video_fmt.bytesperline = 0; fh->video_fmt.field = V4L2_FIELD_ANY; - sfmt = format_by_fourcc(dev,fh->video_fmt.pixelformat); + sfmt = saa7146_format_by_fourcc(dev,fh->video_fmt.pixelformat); fh->video_fmt.sizeimage = (fh->video_fmt.width * fh->video_fmt.height * sfmt->depth)/8; videobuf_queue_sg_init(&fh->video_q, &video_qops, diff --git a/drivers/staging/cx25821/cx25821-video.c b/drivers/staging/cx25821/cx25821-video.c index e7f1d57..5238930 100644 --- a/drivers/staging/cx25821/cx25821-video.c +++ b/drivers/staging/cx25821/cx25821-video.c @@ -92,7 +92,7 @@ int cx25821_get_format_size(void) return ARRAY_SIZE(formats); } -struct cx25821_fmt *format_by_fourcc(unsigned int fourcc) +struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc) { unsigned int i; @@ -848,7 +848,7 @@ static int video_open(struct file *file) pix_format = (dev->channels[ch_id].pixel_formats == PIXEL_FRMT_411) ? V4L2_PIX_FMT_Y41P : V4L2_PIX_FMT_YUYV; - fh->fmt = format_by_fourcc(pix_format); + fh->fmt = cx25821_format_by_fourcc(pix_format); v4l2_prio_open(&dev->channels[ch_id].prio, &fh->prio); @@ -1010,7 +1010,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, if (0 != err) return err; - fh->fmt = format_by_fourcc(f->fmt.pix.pixelformat); + fh->fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat); fh->vidq.field = f->fmt.pix.field; /* check if width and height is valid based on set standard */ @@ -1119,7 +1119,7 @@ int cx25821_vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_fo enum v4l2_field field; unsigned int maxw, maxh; - fmt = format_by_fourcc(f->fmt.pix.pixelformat); + fmt = cx25821_format_by_fourcc(f->fmt.pix.pixelformat); if (NULL == fmt) return -EINVAL; diff --git a/drivers/staging/cx25821/cx25821-video.h b/drivers/staging/cx25821/cx25821-video.h index cc6034b..a2415d3 100644 --- a/drivers/staging/cx25821/cx25821-video.h +++ b/drivers/staging/cx25821/cx25821-video.h @@ -87,7 +87,7 @@ extern unsigned int vid_limit; #define FORMAT_FLAGS_PACKED 0x01 extern struct cx25821_fmt formats[]; -extern struct cx25821_fmt *format_by_fourcc(unsigned int fourcc); +extern struct cx25821_fmt *cx25821_format_by_fourcc(unsigned int fourcc); extern struct cx25821_data timeout_data[MAX_VID_CHANNEL_NUM]; extern void cx25821_dump_video_queue(struct cx25821_dev *dev, diff --git a/include/media/saa7146.h b/include/media/saa7146.h index 7a9f76e..ac7ce00 100644 --- a/include/media/saa7146.h +++ b/include/media/saa7146.h @@ -161,7 +161,7 @@ extern struct list_head saa7146_devices; extern struct mutex saa7146_devices_lock; int saa7146_register_extension(struct saa7146_extension*); int saa7146_unregister_extension(struct saa7146_extension*); -struct saa7146_format* format_by_fourcc(struct saa7146_dev *dev, int fourcc); +struct saa7146_format* saa7146_format_by_fourcc(struct saa7146_dev *dev, int fourcc); int saa7146_pgtable_alloc(struct pci_dev *pci, struct saa7146_pgtable *pt); void saa7146_pgtable_free(struct pci_dev *pci, struct saa7146_pgtable *pt); int saa7146_pgtable_build_single(struct pci_dev *pci, struct saa7146_pgtable *pt, struct scatterlist *list, int length ); -- cgit v0.10.2 From 15664125f7cadcb6d725cb2d9b90f9715397848d Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 24 Nov 2010 10:43:55 +0100 Subject: scripts/tags.sh: Add magic for trace-events Make tags find the trace-event definitions Acked-by: WANG Cong Signed-off-by: Peter Zijlstra LKML-Reference: <1290591835.2072.438.camel@laptop> Signed-off-by: Steven Rostedt diff --git a/scripts/tags.sh b/scripts/tags.sh index 8509bb5..bbbe584 100755 --- a/scripts/tags.sh +++ b/scripts/tags.sh @@ -125,7 +125,9 @@ exuberant() -I DEFINE_TRACE,EXPORT_TRACEPOINT_SYMBOL,EXPORT_TRACEPOINT_SYMBOL_GPL \ --extra=+f --c-kinds=-px \ --regex-asm='/^ENTRY\(([^)]*)\).*/\1/' \ - --regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' + --regex-c='/^SYSCALL_DEFINE[[:digit:]]?\(([^,)]*).*/sys_\1/' \ + --regex-c++='/^TRACE_EVENT\(([^,)]*).*/trace_\1/' \ + --regex-c++='/^DEFINE_EVENT\(([^,)]*).*/trace_\1/' all_kconfigs | xargs $1 -a \ --langdef=kconfig --language-force=kconfig \ -- cgit v0.10.2 From e63233f75a1a6bfa97ffb52a20cc6801a4c63fb2 Mon Sep 17 00:00:00 2001 From: John Reiser Date: Mon, 22 Nov 2010 19:41:44 -0800 Subject: ftrace: Have recordmcount honor endianness in fn_ELF_R_INFO It looks to me like the change which introduced "virtual functions" forgot about cross-platform endianness. Thank you to Arnaud for supplying before+after data files do_mounts*.o. This fixes a MIPS build failure triggered by recordmcount. Reported-by: Arnaud Lacombe Tested-by: Arnaud Lacombe Acked-by: Wu Zhangjin Acked-by: Ralf Baechle Signed-off-by: John Reiser Signed-off-by: Steven Rostedt diff --git a/scripts/recordmcount.h b/scripts/recordmcount.h index 58e933a..3966717 100644 --- a/scripts/recordmcount.h +++ b/scripts/recordmcount.h @@ -119,7 +119,7 @@ static uint_t (*Elf_r_sym)(Elf_Rel const *rp) = fn_ELF_R_SYM; static void fn_ELF_R_INFO(Elf_Rel *const rp, unsigned sym, unsigned type) { - rp->r_info = ELF_R_INFO(sym, type); + rp->r_info = _w(ELF_R_INFO(sym, type)); } static void (*Elf_r_info)(Elf_Rel *const rp, unsigned sym, unsigned type) = fn_ELF_R_INFO; -- cgit v0.10.2 From ecf6f5e7d68471b08603f7c20143ac236602364f Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Mon, 8 Nov 2010 18:08:14 -0500 Subject: fanotify: deny permissions when no event was sent If no event was sent to userspace we cannot expect userspace to respond to permissions requests. Today such requests just hang forever. This patch will deny any permissions event which was unable to be sent to userspace. Reported-by: Tvrtko Ursulin Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 0632248..045c079 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -106,7 +106,7 @@ static int create_fd(struct fsnotify_group *group, struct fsnotify_event *event) return client_fd; } -static ssize_t fill_event_metadata(struct fsnotify_group *group, +static int fill_event_metadata(struct fsnotify_group *group, struct fanotify_event_metadata *metadata, struct fsnotify_event *event) { @@ -257,10 +257,11 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, pr_debug("%s: group=%p event=%p\n", __func__, group, event); - fd = fill_event_metadata(group, &fanotify_event_metadata, event); - if (fd < 0) - return fd; + ret = fill_event_metadata(group, &fanotify_event_metadata, event); + if (ret < 0) + goto out; + fd = ret; ret = prepare_for_access_response(group, event, fd); if (ret) goto out_close_fd; @@ -275,6 +276,13 @@ out_kill_access_response: remove_access_response(group, event, fd); out_close_fd: sys_close(fd); +out: +#ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS + if (event->mask & FAN_ALL_PERM_EVENTS) { + event->response = FAN_DENY; + wake_up(&group->fanotify_data.access_waitq); + } +#endif return ret; } -- cgit v0.10.2 From 88d60c32765716289abeb362c44adf6c35c6824c Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Mon, 8 Nov 2010 18:19:22 -0500 Subject: fanotify: remove packed from access response message Since fanotify has decided to be careful about alignment and packing rather than rely on __attribute__((packed)) for multiarch support. Since this attribute isn't doing anything on fanotify_response we just drop it. This does not break API/ABI. Suggested-by: Tvrtko Ursulin Signed-off-by: Eric Paris diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h index 0f01214..bdbf9bb 100644 --- a/include/linux/fanotify.h +++ b/include/linux/fanotify.h @@ -96,7 +96,7 @@ struct fanotify_event_metadata { struct fanotify_response { __s32 fd; __u32 response; -} __attribute__ ((packed)); +}; /* Legit userspace responses to a _PERM event */ #define FAN_ALLOW 0x01 -- cgit v0.10.2 From b1085ba80cd2784400a7beec3fda5099198ed01c Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Fri, 5 Nov 2010 17:05:27 +0100 Subject: fanotify: if set by user unset FMODE_NONOTIFY before fsnotify_perm() is called Unsetting FMODE_NONOTIFY in fsnotify_open() is too late, since fsnotify_perm() is called before. If FMODE_NONOTIFY is set fsnotify_perm() will skip permission checks, so a user can still disable permission checks by setting this flag in an open() call. This patch corrects this by unsetting the flag before fsnotify_perm is called. Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/fs/namei.c b/fs/namei.c index 5362af9..4ff7ca5 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -1748,6 +1748,9 @@ struct file *do_filp_open(int dfd, const char *pathname, if (!(open_flag & O_CREAT)) mode = 0; + /* Must never be set by userspace */ + open_flag &= ~FMODE_NONOTIFY; + /* * O_SYNC is implemented as __O_SYNC|O_DSYNC. As many places only * check for O_DSYNC if the need any syncing at all we enforce it's diff --git a/include/linux/fsnotify.h b/include/linux/fsnotify.h index 5c185fa..b10bcde 100644 --- a/include/linux/fsnotify.h +++ b/include/linux/fsnotify.h @@ -235,9 +235,6 @@ static inline void fsnotify_open(struct file *file) if (S_ISDIR(inode->i_mode)) mask |= FS_ISDIR; - /* FMODE_NONOTIFY must never be set from user */ - file->f_mode &= ~FMODE_NONOTIFY; - fsnotify_parent(path, NULL, mask); fsnotify(inode, mask, path, FSNOTIFY_EVENT_PATH, NULL, 0); } -- cgit v0.10.2 From fa218ab98c31eeacd12b89501e6b99d146ea56cc Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Tue, 9 Nov 2010 18:18:16 +0100 Subject: fanotify: correct broken ref counting in case adding a mark failed If adding a mount or inode mark failed fanotify_free_mark() is called explicitly. But at this time the mark has already been put into the destroy list of the fsnotify_mark kernel thread. If the thread is too slow it will try to decrease the reference of a mark, that has already been freed by fanotify_free_mark(). (If its fast enough it will only decrease the marks ref counter from 2 to 1 - note that the counter has been increased to 2 in add_mark() - which has practically no effect.) This patch fixes the ref counting by not calling free_mark() explicitly, but decreasing the ref counter and rely on the fsnotify_mark thread to cleanup in case adding the mark has failed. Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 045c079..c0ca1fa 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -594,11 +594,10 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark; __u32 added; + int ret = 0; fsn_mark = fsnotify_find_vfsmount_mark(group, mnt); if (!fsn_mark) { - int ret; - if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) return -ENOSPC; @@ -608,17 +607,16 @@ static int fanotify_add_vfsmount_mark(struct fsnotify_group *group, fsnotify_init_mark(fsn_mark, fanotify_free_mark); ret = fsnotify_add_mark(fsn_mark, group, NULL, mnt, 0); - if (ret) { - fanotify_free_mark(fsn_mark); - return ret; - } + if (ret) + goto err; } added = fanotify_mark_add_to_mask(fsn_mark, mask, flags); - fsnotify_put_mark(fsn_mark); + if (added & ~mnt->mnt_fsnotify_mask) fsnotify_recalc_vfsmount_mask(mnt); - - return 0; +err: + fsnotify_put_mark(fsn_mark); + return ret; } static int fanotify_add_inode_mark(struct fsnotify_group *group, @@ -627,6 +625,7 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, { struct fsnotify_mark *fsn_mark; __u32 added; + int ret = 0; pr_debug("%s: group=%p inode=%p\n", __func__, group, inode); @@ -642,8 +641,6 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, fsn_mark = fsnotify_find_inode_mark(group, inode); if (!fsn_mark) { - int ret; - if (atomic_read(&group->num_marks) > group->fanotify_data.max_marks) return -ENOSPC; @@ -653,16 +650,16 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group, fsnotify_init_mark(fsn_mark, fanotify_free_mark); ret = fsnotify_add_mark(fsn_mark, group, inode, NULL, 0); - if (ret) { - fanotify_free_mark(fsn_mark); - return ret; - } + if (ret) + goto err; } added = fanotify_mark_add_to_mask(fsn_mark, mask, flags); - fsnotify_put_mark(fsn_mark); + if (added & ~inode->i_fsnotify_mask) fsnotify_recalc_inode_mask(inode); - return 0; +err: + fsnotify_put_mark(fsn_mark); + return ret; } /* fanotify syscalls */ -- cgit v0.10.2 From 1734dee4e3a296cb72b4819fc2e7ef2440737dff Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Mon, 22 Nov 2010 18:46:33 +0100 Subject: fanotify: Dont allow a mask of 0 if setting or removing a mark In mark_remove_from_mask() we destroy marks that have their event mask cleared. Thus we should not allow the creation of those marks in the first place. With this patch we check if the mask given from user is 0 in case of FAN_MARK_ADD. If so we return an error. Same for FAN_MARK_REMOVE since this does not have any effect. Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index c0ca1fa..480434c 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -769,8 +769,10 @@ SYSCALL_DEFINE(fanotify_mark)(int fanotify_fd, unsigned int flags, if (flags & ~FAN_ALL_MARK_FLAGS) return -EINVAL; switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) { - case FAN_MARK_ADD: + case FAN_MARK_ADD: /* fallthrough */ case FAN_MARK_REMOVE: + if (!mask) + return -EINVAL; case FAN_MARK_FLUSH: break; default: -- cgit v0.10.2 From 09e5f14e57c70f9d357862bb56e57026c51092a1 Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Fri, 19 Nov 2010 10:58:07 +0100 Subject: fanotify: on group destroy allow all waiters to bypass permission check When fanotify_release() is called, there may still be processes waiting for access permission. Currently only processes for which an event has already been queued into the groups access list will be woken up. Processes for which no event has been queued will continue to sleep and thus cause a deadlock when fsnotify_put_group() is called. Furthermore there is a race allowing further processes to be waiting on the access wait queue after wake_up (if they arrive before clear_marks_by_group() is called). This patch corrects this by setting a flag to inform processes that the group is about to be destroyed and thus not to wait for access permission. [additional changelog from eparis] Lets think about the 4 relevant code paths from the PoV of the 'operator' 'listener' 'responder' and 'closer'. Where operator is the process doing an action (like open/read) which could require permission. Listener is the task (or in this case thread) slated with reading from the fanotify file descriptor. The 'responder' is the thread responsible for responding to access requests. 'Closer' is the thread attempting to close the fanotify file descriptor. The 'operator' is going to end up in: fanotify_handle_event() get_response_from_access() (THIS BLOCKS WAITING ON USERSPACE) The 'listener' interesting code path fanotify_read() copy_event_to_user() prepare_for_access_response() (THIS CREATES AN fanotify_response_event) The 'responder' code path: fanotify_write() process_access_response() (REMOVE A fanotify_response_event, SET RESPONSE, WAKE UP 'operator') The 'closer': fanotify_release() (SUPPOSED TO CLEAN UP THE REST OF THIS MESS) What we have today is that in the closer we remove all of the fanotify_response_events and set a bit so no more response events are ever created in prepare_for_access_response(). The bug is that we never wake all of the operators up and tell them to move along. You fix that in fanotify_get_response_from_access(). You also fix other operators which haven't gotten there yet. So I agree that's a good fix. [/additional changelog from eparis] [remove additional changes to minimize patch size] [move initialization so it was inside CONFIG_FANOTIFY_PERMISSION] Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c index b04f88e..f35794b 100644 --- a/fs/notify/fanotify/fanotify.c +++ b/fs/notify/fanotify/fanotify.c @@ -92,7 +92,11 @@ static int fanotify_get_response_from_access(struct fsnotify_group *group, pr_debug("%s: group=%p event=%p\n", __func__, group, event); - wait_event(group->fanotify_data.access_waitq, event->response); + wait_event(group->fanotify_data.access_waitq, event->response || + atomic_read(&group->fanotify_data.bypass_perm)); + + if (!event->response) /* bypass_perm set */ + return 0; /* userspace responded, convert to something usable */ spin_lock(&event->lock); diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 480434c..01fffe6 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -200,7 +200,7 @@ static int prepare_for_access_response(struct fsnotify_group *group, mutex_lock(&group->fanotify_data.access_mutex); - if (group->fanotify_data.bypass_perm) { + if (atomic_read(&group->fanotify_data.bypass_perm)) { mutex_unlock(&group->fanotify_data.access_mutex); kmem_cache_free(fanotify_response_event_cache, re); event->response = FAN_ALLOW; @@ -390,7 +390,7 @@ static int fanotify_release(struct inode *ignored, struct file *file) mutex_lock(&group->fanotify_data.access_mutex); - group->fanotify_data.bypass_perm = true; + atomic_inc(&group->fanotify_data.bypass_perm); list_for_each_entry_safe(re, lre, &group->fanotify_data.access_list, list) { pr_debug("%s: found group=%p re=%p event=%p\n", __func__, group, @@ -703,6 +703,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) mutex_init(&group->fanotify_data.access_mutex); init_waitqueue_head(&group->fanotify_data.access_waitq); INIT_LIST_HEAD(&group->fanotify_data.access_list); + atomic_set(&group->fanotify_data.bypass_perm, 0); #endif switch (flags & FAN_ALL_CLASS_BITS) { case FAN_CLASS_NOTIF: diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h index 0a68f92..7380763 100644 --- a/include/linux/fsnotify_backend.h +++ b/include/linux/fsnotify_backend.h @@ -166,7 +166,7 @@ struct fsnotify_group { struct mutex access_mutex; struct list_head access_list; wait_queue_head_t access_waitq; - bool bypass_perm; /* protected by access_mutex */ + atomic_t bypass_perm; #endif /* CONFIG_FANOTIFY_ACCESS_PERMISSIONS */ int f_flags; unsigned int max_marks; -- cgit v0.10.2 From a2ae4cc9a16e211c8a128ba10d22a85431f093ab Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Tue, 23 Nov 2010 18:18:37 -0500 Subject: inotify: stop kernel memory leak on file creation failure If inotify_init is unable to allocate a new file for the new inotify group we leak the new group. This patch drops the reference on the group on file allocation failure. Reported-by: Vegard Nossum cc: stable@kernel.org Signed-off-by: Eric Paris diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c index 444c305..4cd5d5d 100644 --- a/fs/notify/inotify/inotify_user.c +++ b/fs/notify/inotify/inotify_user.c @@ -752,6 +752,7 @@ SYSCALL_DEFINE1(inotify_init1, int, flags) if (ret >= 0) return ret; + fsnotify_put_group(group); atomic_dec(&user->inotify_devs); out_free_uid: free_uid(user); -- cgit v0.10.2 From 26379198937fcc9bbe7be76be695d06df8334eaa Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Tue, 23 Nov 2010 23:48:26 -0500 Subject: fanotify: do not leak user reference on allocation failure If fanotify_init is unable to allocate a new fsnotify group it will return but will not drop its reference on the associated user struct. Drop that reference on error. Reported-by: Vegard Nossum Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index 01fffe6..ca54957 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -692,8 +692,10 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags) /* fsnotify_alloc_group takes a ref. Dropped in fanotify_release */ group = fsnotify_alloc_group(&fanotify_fsnotify_ops); - if (IS_ERR(group)) + if (IS_ERR(group)) { + free_uid(user); return PTR_ERR(group); + } group->fanotify_data.user = user; atomic_inc(&user->fanotify_listeners); -- cgit v0.10.2 From e9a3854fd4ff3907e6c200a3980e19365ee695e9 Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Wed, 24 Nov 2010 18:22:09 +0100 Subject: fanotify: Introduce FAN_NOFD FAN_NOFD is used in fanotify events that do not provide an open file descriptor (like the overflow_event). Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h index bdbf9bb..c732243 100644 --- a/include/linux/fanotify.h +++ b/include/linux/fanotify.h @@ -101,6 +101,8 @@ struct fanotify_response { /* Legit userspace responses to a _PERM event */ #define FAN_ALLOW 0x01 #define FAN_DENY 0x02 +/* No fd set in event */ +#define FAN_NOFD -1 /* Helper functions to deal with fanotify_event_metadata buffers */ #define FAN_EVENT_METADATA_LEN (sizeof(struct fanotify_event_metadata)) -- cgit v0.10.2 From fdbf3ceeb659f0b3c0e8dd79b331b7ac05910f1e Mon Sep 17 00:00:00 2001 From: Lino Sanfilippo Date: Wed, 24 Nov 2010 18:26:04 +0100 Subject: fanotify: Dont try to open a file descriptor for the overflow event We should not try to open a file descriptor for the overflow event since this will always fail. Signed-off-by: Lino Sanfilippo Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index ca54957..dccd798 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -110,6 +110,8 @@ static int fill_event_metadata(struct fsnotify_group *group, struct fanotify_event_metadata *metadata, struct fsnotify_event *event) { + int ret = 0; + pr_debug("%s: group=%p metadata=%p event=%p\n", __func__, group, metadata, event); @@ -117,9 +119,15 @@ static int fill_event_metadata(struct fsnotify_group *group, metadata->vers = FANOTIFY_METADATA_VERSION; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); - metadata->fd = create_fd(group, event); + if (unlikely(event->mask & FAN_Q_OVERFLOW)) + metadata->fd = FAN_NOFD; + else { + metadata->fd = create_fd(group, event); + if (metadata->fd < 0) + ret = metadata->fd; + } - return metadata->fd; + return ret; } #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS @@ -261,7 +269,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, if (ret < 0) goto out; - fd = ret; + fd = fanotify_event_metadata.fd; ret = prepare_for_access_response(group, event, fd); if (ret) goto out_close_fd; @@ -275,7 +283,8 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, out_kill_access_response: remove_access_response(group, event, fd); out_close_fd: - sys_close(fd); + if (fd != FAN_NOFD) + sys_close(fd); out: #ifdef CONFIG_FANOTIFY_ACCESS_PERMISSIONS if (event->mask & FAN_ALL_PERM_EVENTS) { -- cgit v0.10.2 From 3ea3aa8cf67d3bbe00a19b6a4013d19efa7d0f41 Mon Sep 17 00:00:00 2001 From: Sheng Yang Date: Wed, 8 Dec 2010 10:49:43 +0800 Subject: KVM: Fix OSXSAVE after migration CPUID's OSXSAVE is a mirror of CR4.OSXSAVE bit. We need to update the CPUID after migration. KVM-Stable-Tag. Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index cdac9e5..eb5c834 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -5522,6 +5522,8 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, mmu_reset_needed |= kvm_read_cr4(vcpu) != sregs->cr4; kvm_x86_ops->set_cr4(vcpu, sregs->cr4); + if (sregs->cr4 & X86_CR4_OSXSAVE) + update_cpuid(vcpu); if (!is_long_mode(vcpu) && is_pae(vcpu)) { load_pdptrs(vcpu, vcpu->arch.walk_mmu, vcpu->arch.cr3); mmu_reset_needed = 1; -- cgit v0.10.2 From 24d1b15f72abe3465e871d11cfc9dc34d1aab8b2 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 7 Dec 2010 17:15:05 +0100 Subject: KVM: SVM: Do not report xsave in supported cpuid To support xsave properly for the guest the SVM module need software support for it. As long as this is not present do not report the xsave as supported feature in cpuid. As a side-effect this patch moves the bit() helper function into the x86.h file so that it can be used in svm.c too. KVM-Stable-Tag. Signed-off-by: Joerg Roedel Signed-off-by: Avi Kivity diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 1ca1229..b81a9b7 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -3494,6 +3494,10 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu) static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) { switch (func) { + case 0x00000001: + /* Mask out xsave bit as long as it is not supported by SVM */ + entry->ecx &= ~(bit(X86_FEATURE_XSAVE)); + break; case 0x80000001: if (nested) entry->ecx |= (1 << 2); /* Set SVM bit */ diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index ff21fdd..81fcbe9 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -4227,11 +4227,6 @@ static int vmx_get_lpage_level(void) return PT_PDPE_LEVEL; } -static inline u32 bit(int bitno) -{ - return 1 << (bitno & 31); -} - static void vmx_cpuid_update(struct kvm_vcpu *vcpu) { struct kvm_cpuid_entry2 *best; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index eb5c834..e3abd84 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -155,11 +155,6 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { u64 __read_mostly host_xcr0; -static inline u32 bit(int bitno) -{ - return 1 << (bitno & 31); -} - static void kvm_on_user_return(struct user_return_notifier *urn) { unsigned slot; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 2cea414..c600da8 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -70,6 +70,11 @@ static inline int is_paging(struct kvm_vcpu *vcpu) return kvm_read_cr0_bits(vcpu, X86_CR0_PG); } +static inline u32 bit(int bitno) +{ + return 1 << (bitno & 31); +} + void kvm_before_handle_nmi(struct kvm_vcpu *vcpu); void kvm_after_handle_nmi(struct kvm_vcpu *vcpu); int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq); -- cgit v0.10.2 From 73c1160ce377d8fc6d84cb630ebf9658808bec49 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Wed, 1 Dec 2010 12:17:44 +0100 Subject: KVM: enlarge number of possible CPUID leaves Currently the number of CPUID leaves KVM handles is limited to 40. My desktop machine (AthlonII) already has 35 and future CPUs will expand this well beyond the limit. Extend the limit to 80 to make room for future processors. KVM-Stable-Tag. Signed-off-by: Andre Przywara Signed-off-by: Avi Kivity diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 9e6fe39..f702f82 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -79,7 +79,7 @@ #define KVM_NUM_MMU_PAGES (1 << KVM_MMU_HASH_SHIFT) #define KVM_MIN_FREE_MMU_PAGES 5 #define KVM_REFILL_PAGES 25 -#define KVM_MAX_CPUID_ENTRIES 40 +#define KVM_MAX_CPUID_ENTRIES 80 #define KVM_NR_FIXED_MTRR_REGION 88 #define KVM_NR_VAR_MTRR 8 -- cgit v0.10.2 From 5167695753c63444a9e6cbbef136200a16c7a225 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 7 Dec 2010 14:18:20 +0100 Subject: perf: Fix duplicate events with multiple-pmu vs software events Because the multi-pmu bits can share contexts between struct pmu instances we could get duplicate events by iterating the pmu list. Signed-off-by: Peter Zijlstra Signed-off-by: Thomas Gleixner LKML-Reference: Signed-off-by: Ingo Molnar diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index de2c417..4f1279e 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -887,6 +887,7 @@ struct perf_cpu_context { int exclusive; struct list_head rotation_list; int jiffies_interval; + struct pmu *active_pmu; }; struct perf_output_handle { diff --git a/kernel/perf_event.c b/kernel/perf_event.c index eac7e33..7b87017 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3824,6 +3824,8 @@ static void perf_event_task_event(struct perf_task_event *task_event) rcu_read_lock(); list_for_each_entry_rcu(pmu, &pmus, entry) { cpuctx = get_cpu_ptr(pmu->pmu_cpu_context); + if (cpuctx->active_pmu != pmu) + goto next; perf_event_task_ctx(&cpuctx->ctx, task_event); ctx = task_event->task_ctx; @@ -3959,6 +3961,8 @@ static void perf_event_comm_event(struct perf_comm_event *comm_event) rcu_read_lock(); list_for_each_entry_rcu(pmu, &pmus, entry) { cpuctx = get_cpu_ptr(pmu->pmu_cpu_context); + if (cpuctx->active_pmu != pmu) + goto next; perf_event_comm_ctx(&cpuctx->ctx, comm_event); ctxn = pmu->task_ctx_nr; @@ -4144,6 +4148,8 @@ got_name: rcu_read_lock(); list_for_each_entry_rcu(pmu, &pmus, entry) { cpuctx = get_cpu_ptr(pmu->pmu_cpu_context); + if (cpuctx->active_pmu != pmu) + goto next; perf_event_mmap_ctx(&cpuctx->ctx, mmap_event, vma->vm_flags & VM_EXEC); @@ -5145,20 +5151,36 @@ static void *find_pmu_context(int ctxn) return NULL; } -static void free_pmu_context(void * __percpu cpu_context) +static void update_pmu_context(struct pmu *pmu, struct pmu *old_pmu) { - struct pmu *pmu; + int cpu; + + for_each_possible_cpu(cpu) { + struct perf_cpu_context *cpuctx; + + cpuctx = per_cpu_ptr(pmu->pmu_cpu_context, cpu); + + if (cpuctx->active_pmu == old_pmu) + cpuctx->active_pmu = pmu; + } +} + +static void free_pmu_context(struct pmu *pmu) +{ + struct pmu *i; mutex_lock(&pmus_lock); /* * Like a real lame refcount. */ - list_for_each_entry(pmu, &pmus, entry) { - if (pmu->pmu_cpu_context == cpu_context) + list_for_each_entry(i, &pmus, entry) { + if (i->pmu_cpu_context == pmu->pmu_cpu_context) { + update_pmu_context(i, pmu); goto out; + } } - free_percpu(cpu_context); + free_percpu(pmu->pmu_cpu_context); out: mutex_unlock(&pmus_lock); } @@ -5190,6 +5212,7 @@ int perf_pmu_register(struct pmu *pmu) cpuctx->ctx.pmu = pmu; cpuctx->jiffies_interval = 1; INIT_LIST_HEAD(&cpuctx->rotation_list); + cpuctx->active_pmu = pmu; } got_cpu_context: @@ -5241,7 +5264,7 @@ void perf_pmu_unregister(struct pmu *pmu) synchronize_rcu(); free_percpu(pmu->pmu_disable_count); - free_pmu_context(pmu->pmu_cpu_context); + free_pmu_context(pmu); } struct pmu *perf_init_event(struct perf_event *event) -- cgit v0.10.2 From 0f004f5a696a9434b7214d0d3cbd0525ee77d428 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 30 Nov 2010 19:48:45 +0100 Subject: sched: Cure more NO_HZ load average woes There's a long-running regression that proved difficult to fix and which is hitting certain people and is rather annoying in its effects. Damien reported that after 74f5187ac8 (sched: Cure load average vs NO_HZ woes) his load average is unnaturally high, he also noted that even with that patch reverted the load avgerage numbers are not correct. The problem is that the previous patch only solved half the NO_HZ problem, it addressed the part of going into NO_HZ mode, not of comming out of NO_HZ mode. This patch implements that missing half. When comming out of NO_HZ mode there are two important things to take care of: - Folding the pending idle delta into the global active count. - Correctly aging the averages for the idle-duration. So with this patch the NO_HZ interaction should be complete and behaviour between CONFIG_NO_HZ=[yn] should be equivalent. Furthermore, this patch slightly changes the load average computation by adding a rounding term to the fixed point multiplication. Reported-by: Damien Wyart Reported-by: Tim McGrath Tested-by: Damien Wyart Tested-by: Orion Poplawski Tested-by: Kyle McMartin Signed-off-by: Peter Zijlstra Cc: stable@kernel.org Cc: Chase Douglas LKML-Reference: <1291129145.32004.874.camel@laptop> Signed-off-by: Ingo Molnar diff --git a/include/linux/sched.h b/include/linux/sched.h index 2c79e92..2238745 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -143,7 +143,7 @@ extern unsigned long nr_iowait_cpu(int cpu); extern unsigned long this_cpu_load(void); -extern void calc_global_load(void); +extern void calc_global_load(unsigned long ticks); extern unsigned long get_parent_ip(unsigned long addr); diff --git a/kernel/sched.c b/kernel/sched.c index dc91a4d..6b7c26a 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3119,6 +3119,15 @@ static long calc_load_fold_active(struct rq *this_rq) return delta; } +static unsigned long +calc_load(unsigned long load, unsigned long exp, unsigned long active) +{ + load *= exp; + load += active * (FIXED_1 - exp); + load += 1UL << (FSHIFT - 1); + return load >> FSHIFT; +} + #ifdef CONFIG_NO_HZ /* * For NO_HZ we delay the active fold to the next LOAD_FREQ update. @@ -3148,6 +3157,128 @@ static long calc_load_fold_idle(void) return delta; } + +/** + * fixed_power_int - compute: x^n, in O(log n) time + * + * @x: base of the power + * @frac_bits: fractional bits of @x + * @n: power to raise @x to. + * + * By exploiting the relation between the definition of the natural power + * function: x^n := x*x*...*x (x multiplied by itself for n times), and + * the binary encoding of numbers used by computers: n := \Sum n_i * 2^i, + * (where: n_i \elem {0, 1}, the binary vector representing n), + * we find: x^n := x^(\Sum n_i * 2^i) := \Prod x^(n_i * 2^i), which is + * of course trivially computable in O(log_2 n), the length of our binary + * vector. + */ +static unsigned long +fixed_power_int(unsigned long x, unsigned int frac_bits, unsigned int n) +{ + unsigned long result = 1UL << frac_bits; + + if (n) for (;;) { + if (n & 1) { + result *= x; + result += 1UL << (frac_bits - 1); + result >>= frac_bits; + } + n >>= 1; + if (!n) + break; + x *= x; + x += 1UL << (frac_bits - 1); + x >>= frac_bits; + } + + return result; +} + +/* + * a1 = a0 * e + a * (1 - e) + * + * a2 = a1 * e + a * (1 - e) + * = (a0 * e + a * (1 - e)) * e + a * (1 - e) + * = a0 * e^2 + a * (1 - e) * (1 + e) + * + * a3 = a2 * e + a * (1 - e) + * = (a0 * e^2 + a * (1 - e) * (1 + e)) * e + a * (1 - e) + * = a0 * e^3 + a * (1 - e) * (1 + e + e^2) + * + * ... + * + * an = a0 * e^n + a * (1 - e) * (1 + e + ... + e^n-1) [1] + * = a0 * e^n + a * (1 - e) * (1 - e^n)/(1 - e) + * = a0 * e^n + a * (1 - e^n) + * + * [1] application of the geometric series: + * + * n 1 - x^(n+1) + * S_n := \Sum x^i = ------------- + * i=0 1 - x + */ +static unsigned long +calc_load_n(unsigned long load, unsigned long exp, + unsigned long active, unsigned int n) +{ + + return calc_load(load, fixed_power_int(exp, FSHIFT, n), active); +} + +/* + * NO_HZ can leave us missing all per-cpu ticks calling + * calc_load_account_active(), but since an idle CPU folds its delta into + * calc_load_tasks_idle per calc_load_account_idle(), all we need to do is fold + * in the pending idle delta if our idle period crossed a load cycle boundary. + * + * Once we've updated the global active value, we need to apply the exponential + * weights adjusted to the number of cycles missed. + */ +static void calc_global_nohz(unsigned long ticks) +{ + long delta, active, n; + + if (time_before(jiffies, calc_load_update)) + return; + + /* + * If we crossed a calc_load_update boundary, make sure to fold + * any pending idle changes, the respective CPUs might have + * missed the tick driven calc_load_account_active() update + * due to NO_HZ. + */ + delta = calc_load_fold_idle(); + if (delta) + atomic_long_add(delta, &calc_load_tasks); + + /* + * If we were idle for multiple load cycles, apply them. + */ + if (ticks >= LOAD_FREQ) { + n = ticks / LOAD_FREQ; + + active = atomic_long_read(&calc_load_tasks); + active = active > 0 ? active * FIXED_1 : 0; + + avenrun[0] = calc_load_n(avenrun[0], EXP_1, active, n); + avenrun[1] = calc_load_n(avenrun[1], EXP_5, active, n); + avenrun[2] = calc_load_n(avenrun[2], EXP_15, active, n); + + calc_load_update += n * LOAD_FREQ; + } + + /* + * Its possible the remainder of the above division also crosses + * a LOAD_FREQ period, the regular check in calc_global_load() + * which comes after this will take care of that. + * + * Consider us being 11 ticks before a cycle completion, and us + * sleeping for 4*LOAD_FREQ + 22 ticks, then the above code will + * age us 4 cycles, and the test in calc_global_load() will + * pick up the final one. + */ +} #else static void calc_load_account_idle(struct rq *this_rq) { @@ -3157,6 +3288,10 @@ static inline long calc_load_fold_idle(void) { return 0; } + +static void calc_global_nohz(unsigned long ticks) +{ +} #endif /** @@ -3174,24 +3309,17 @@ void get_avenrun(unsigned long *loads, unsigned long offset, int shift) loads[2] = (avenrun[2] + offset) << shift; } -static unsigned long -calc_load(unsigned long load, unsigned long exp, unsigned long active) -{ - load *= exp; - load += active * (FIXED_1 - exp); - return load >> FSHIFT; -} - /* * calc_load - update the avenrun load estimates 10 ticks after the * CPUs have updated calc_load_tasks. */ -void calc_global_load(void) +void calc_global_load(unsigned long ticks) { - unsigned long upd = calc_load_update + 10; long active; - if (time_before(jiffies, upd)) + calc_global_nohz(ticks); + + if (time_before(jiffies, calc_load_update + 10)) return; active = atomic_long_read(&calc_load_tasks); diff --git a/kernel/timer.c b/kernel/timer.c index 68a9ae7..7bd715f 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1319,7 +1319,7 @@ void do_timer(unsigned long ticks) { jiffies_64 += ticks; update_wall_time(); - calc_global_load(); + calc_global_load(ticks); } #ifdef __ARCH_WANT_SYS_ALARM -- cgit v0.10.2 From f26f9aff6aaf67e9a430d16c266f91b13a5bff64 Mon Sep 17 00:00:00 2001 From: Mike Galbraith Date: Wed, 8 Dec 2010 11:05:42 +0100 Subject: Sched: fix skip_clock_update optimization idle_balance() drops/retakes rq->lock, leaving the previous task vulnerable to set_tsk_need_resched(). Clear it after we return from balancing instead, and in setup_thread_stack() as well, so no successfully descheduled or never scheduled task has it set. Need resched confused the skip_clock_update logic, which assumes that the next call to update_rq_clock() will come nearly immediately after being set. Make the optimization robust against the waking a sleeper before it sucessfully deschedules case by checking that the current task has not been dequeued before setting the flag, since it is that useless clock update we're trying to save, and clear unconditionally in schedule() proper instead of conditionally in put_prev_task(). Signed-off-by: Mike Galbraith Reported-by: Bjoern B. Brandenburg Tested-by: Yong Zhang Signed-off-by: Peter Zijlstra Cc: stable@kernel.org LKML-Reference: <1291802742.1417.9.camel@marge.simson.net> Signed-off-by: Ingo Molnar diff --git a/kernel/fork.c b/kernel/fork.c index 3b159c5..5447dc7 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -273,6 +273,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig) setup_thread_stack(tsk, orig); clear_user_return_notifier(tsk); + clear_tsk_need_resched(tsk); stackend = end_of_stack(tsk); *stackend = STACK_END_MAGIC; /* for overflow detection */ diff --git a/kernel/sched.c b/kernel/sched.c index 6b7c26a..da14302 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -641,17 +641,18 @@ static void sched_irq_time_avg_update(struct rq *rq, u64 irq_time); inline void update_rq_clock(struct rq *rq) { - if (!rq->skip_clock_update) { - int cpu = cpu_of(rq); - u64 irq_time; + int cpu = cpu_of(rq); + u64 irq_time; - rq->clock = sched_clock_cpu(cpu); - irq_time = irq_time_cpu(cpu); - if (rq->clock - irq_time > rq->clock_task) - rq->clock_task = rq->clock - irq_time; + if (rq->skip_clock_update) + return; - sched_irq_time_avg_update(rq, irq_time); - } + rq->clock = sched_clock_cpu(cpu); + irq_time = irq_time_cpu(cpu); + if (rq->clock - irq_time > rq->clock_task) + rq->clock_task = rq->clock - irq_time; + + sched_irq_time_avg_update(rq, irq_time); } /* @@ -2129,7 +2130,7 @@ static void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags) * A queue event has occurred, and we're going to schedule. In * this case, we can save a useless back to back clock update. */ - if (test_tsk_need_resched(rq->curr)) + if (rq->curr->se.on_rq && test_tsk_need_resched(rq->curr)) rq->skip_clock_update = 1; } @@ -3973,7 +3974,6 @@ static void put_prev_task(struct rq *rq, struct task_struct *prev) { if (prev->se.on_rq) update_rq_clock(rq); - rq->skip_clock_update = 0; prev->sched_class->put_prev_task(rq, prev); } @@ -4031,7 +4031,6 @@ need_resched_nonpreemptible: hrtick_clear(rq); raw_spin_lock_irq(&rq->lock); - clear_tsk_need_resched(prev); switch_count = &prev->nivcsw; if (prev->state && !(preempt_count() & PREEMPT_ACTIVE)) { @@ -4063,6 +4062,8 @@ need_resched_nonpreemptible: put_prev_task(rq, prev); next = pick_next_task(rq); + clear_tsk_need_resched(prev); + rq->skip_clock_update = 0; if (likely(prev != next)) { sched_info_switch(prev, next); @@ -4071,6 +4072,7 @@ need_resched_nonpreemptible: rq->nr_switches++; rq->curr = next; ++*switch_count; + WARN_ON_ONCE(test_tsk_need_resched(next)); context_switch(rq, prev, next); /* unlocks the rq */ /* -- cgit v0.10.2 From dbd87b5af055a0cc9bba17795c9a2b0d17795389 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Wed, 1 Dec 2010 10:11:09 +0100 Subject: nohz: Fix get_next_timer_interrupt() vs cpu hotplug This fixes a bug as seen on 2.6.32 based kernels where timers got enqueued on offline cpus. If a cpu goes offline it might still have pending timers. These will be migrated during CPU_DEAD handling after the cpu is offline. However while the cpu is going offline it will schedule the idle task which will then call tick_nohz_stop_sched_tick(). That function in turn will call get_next_timer_intterupt() to figure out if the tick of the cpu can be stopped or not. If it turns out that the next tick is just one jiffy off (delta_jiffies == 1) tick_nohz_stop_sched_tick() incorrectly assumes that the tick should not stop and takes an early exit and thus it won't update the load balancer cpu. Just afterwards the cpu will be killed and the load balancer cpu could be the offline cpu. On 2.6.32 based kernel get_nohz_load_balancer() gets called to decide on which cpu a timer should be enqueued (see __mod_timer()). Which leads to the possibility that timers get enqueued on an offline cpu. These will never expire and can cause a system hang. This has been observed 2.6.32 kernels. On current kernels __mod_timer() uses get_nohz_timer_target() which doesn't have that problem. However there might be other problems because of the too early exit tick_nohz_stop_sched_tick() in case a cpu goes offline. The easiest and probably safest fix seems to be to let get_next_timer_interrupt() just lie and let it say there isn't any pending timer if the current cpu is offline. I also thought of moving migrate_[hr]timers() from CPU_DEAD to CPU_DYING, but seeing that there already have been fixes at least in the hrtimer code in this area I'm afraid that this could add new subtle bugs. Signed-off-by: Heiko Carstens Signed-off-by: Peter Zijlstra LKML-Reference: <20101201091109.GA8984@osiris.boeblingen.de.ibm.com> Cc: stable@kernel.org Signed-off-by: Ingo Molnar diff --git a/kernel/timer.c b/kernel/timer.c index 7bd715f..353b922 100644 --- a/kernel/timer.c +++ b/kernel/timer.c @@ -1252,6 +1252,12 @@ unsigned long get_next_timer_interrupt(unsigned long now) struct tvec_base *base = __get_cpu_var(tvec_bases); unsigned long expires; + /* + * Pretend that there is no timer pending if the cpu is offline. + * Possible pending timers will be migrated later to an active cpu. + */ + if (cpu_is_offline(smp_processor_id())) + return now + NEXT_TIMER_MAX_DELTA; spin_lock(&base->lock); if (time_before_eq(base->next_timer, base->timer_jiffies)) base->next_timer = __next_timer_interrupt(base); -- cgit v0.10.2 From 3f343f8512c7882a3637d9aea4ec6b3801cbcdc5 Mon Sep 17 00:00:00 2001 From: Dmitry Artamonow Date: Wed, 8 Dec 2010 23:36:17 +0300 Subject: ASoC: fix deemphasis control in wm8904/55/60 codecs Deemphasis control's .get callback should update control's value instead of returning it - return value of callback function is used for indicating error or success of operation. Signed-off-by: Dmitry Artamonow Acked-by: Liam Girdwood Signed-off-by: Mark Brown Cc: stable@kernel.org diff --git a/sound/soc/codecs/wm8904.c b/sound/soc/codecs/wm8904.c index fca60a0..9001cc4 100644 --- a/sound/soc/codecs/wm8904.c +++ b/sound/soc/codecs/wm8904.c @@ -818,7 +818,8 @@ static int wm8904_get_deemph(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8904_priv *wm8904 = snd_soc_codec_get_drvdata(codec); - return wm8904->deemph; + ucontrol->value.enumerated.item[0] = wm8904->deemph; + return 0; } static int wm8904_put_deemph(struct snd_kcontrol *kcontrol, diff --git a/sound/soc/codecs/wm8955.c b/sound/soc/codecs/wm8955.c index f89ad6c..9cbab8e 100644 --- a/sound/soc/codecs/wm8955.c +++ b/sound/soc/codecs/wm8955.c @@ -380,7 +380,8 @@ static int wm8955_get_deemph(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec); - return wm8955->deemph; + ucontrol->value.enumerated.item[0] = wm8955->deemph; + return 0; } static int wm8955_put_deemph(struct snd_kcontrol *kcontrol, diff --git a/sound/soc/codecs/wm8960.c b/sound/soc/codecs/wm8960.c index 8d5efb3..21986c4 100644 --- a/sound/soc/codecs/wm8960.c +++ b/sound/soc/codecs/wm8960.c @@ -138,7 +138,8 @@ static int wm8960_get_deemph(struct snd_kcontrol *kcontrol, struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); struct wm8960_priv *wm8960 = snd_soc_codec_get_drvdata(codec); - return wm8960->deemph; + ucontrol->value.enumerated.item[0] = wm8960->deemph; + return 0; } static int wm8960_put_deemph(struct snd_kcontrol *kcontrol, -- cgit v0.10.2 From a0968628097380be52db8b4664da98fc425546a5 Mon Sep 17 00:00:00 2001 From: Seungwhan Youn Date: Thu, 9 Dec 2010 18:07:52 +0900 Subject: ASoC: WM8580: Fix R8 initial value Acc to WM8580 manual, the default value for R8 is 0x10, not 0x1c. Signed-off-by: Seungwhan Youn Acked-by: Liam Girdwood Signed-off-by: Mark Brown Cc: stable@kernel.org diff --git a/sound/soc/codecs/wm8580.c b/sound/soc/codecs/wm8580.c index 879dff2..8725d4e 100644 --- a/sound/soc/codecs/wm8580.c +++ b/sound/soc/codecs/wm8580.c @@ -161,7 +161,7 @@ static const u16 wm8580_reg[] = { 0x0121, 0x017e, 0x007d, 0x0014, /*R3*/ 0x0121, 0x017e, 0x007d, 0x0194, /*R7*/ - 0x001c, 0x0002, 0x0002, 0x00c2, /*R11*/ + 0x0010, 0x0002, 0x0002, 0x00c2, /*R11*/ 0x0182, 0x0082, 0x000a, 0x0024, /*R15*/ 0x0009, 0x0000, 0x00ff, 0x0000, /*R19*/ 0x00ff, 0x00ff, 0x00ff, 0x00ff, /*R23*/ -- cgit v0.10.2 From 4720dd1b3858f0da2593188cb1e57eb0d3bc4af2 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 9 Dec 2010 17:43:21 +0100 Subject: x86: io_apic: Avoid unused variable warning when CONFIG_GENERIC_PENDING_IRQ=n arch/x86/kernel/apic/io_apic.c: In function 'ack_apic_level': arch/x86/kernel/apic/io_apic.c:2433: warning: unused variable 'desc' Signed-off-by: Andrew Morton LKML-Reference: <201010272107.o9RL7rse018212@imap1.linux-foundation.org> Signed-off-by: Thomas Gleixner diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 7cc0a72..226060e 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -2430,13 +2430,12 @@ static void ack_apic_level(struct irq_data *data) { struct irq_cfg *cfg = data->chip_data; int i, do_unmask_irq = 0, irq = data->irq; - struct irq_desc *desc = irq_to_desc(irq); unsigned long v; irq_complete_move(cfg); #ifdef CONFIG_GENERIC_PENDING_IRQ /* If we are moving the irq we need to mask it */ - if (unlikely(desc->status & IRQ_MOVE_PENDING)) { + if (unlikely(irq_to_desc(irq)->status & IRQ_MOVE_PENDING)) { do_unmask_irq = 1; mask_ioapic(cfg); } -- cgit v0.10.2 From f8bbeabc34aa945ab4275abc9a4dfde0aea798ca Mon Sep 17 00:00:00 2001 From: Sarah Sharp Date: Thu, 9 Dec 2010 10:29:00 -0800 Subject: xhci: Fix issue with port array setup and buggy hosts. Fix two bugs with the port array setup. The first bug will only show up with broken xHCI hosts with Extended Capabilities registers that have duplicate port speed entries for the same port. The idea with the original code was to set the port_array entry to -1 if the duplicate port speed entry said the port was a different speed than the original port speed entry. That would mean that later, the port would not be exposed to the USB core. Unfortunately, I forgot a continue statement, and the port_array entry would just be overwritten in the next line. The second bug would happen if there are conflicting port speed registers (so that some entry in port_array is -1), or one of the hardware port registers was not described in the port speed registers (so that some entry in port_array is 0). The code that sets up the usb2_ports array would accidentally claim those ports. That wouldn't really cause any user-visible issues, but it is a bug. This patch should go into the stable trees that have the port array and USB 3.0 port disabling prevention patches. Signed-off-by: Sarah Sharp Cc: stable@kernel.org diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c index 0fae58e..1d0f45f 100644 --- a/drivers/usb/host/xhci-mem.c +++ b/drivers/usb/host/xhci-mem.c @@ -1680,6 +1680,7 @@ static void xhci_add_in_port(struct xhci_hcd *xhci, unsigned int num_ports, xhci->port_array[i] = (u8) -1; } /* FIXME: Should we disable the port? */ + continue; } xhci->port_array[i] = major_revision; if (major_revision == 0x03) @@ -1758,16 +1759,20 @@ static int xhci_setup_port_arrays(struct xhci_hcd *xhci, gfp_t flags) return -ENOMEM; port_index = 0; - for (i = 0; i < num_ports; i++) - if (xhci->port_array[i] != 0x03) { - xhci->usb2_ports[port_index] = - &xhci->op_regs->port_status_base + - NUM_PORT_REGS*i; - xhci_dbg(xhci, "USB 2.0 port at index %u, " - "addr = %p\n", i, - xhci->usb2_ports[port_index]); - port_index++; - } + for (i = 0; i < num_ports; i++) { + if (xhci->port_array[i] == 0x03 || + xhci->port_array[i] == 0 || + xhci->port_array[i] == -1) + continue; + + xhci->usb2_ports[port_index] = + &xhci->op_regs->port_status_base + + NUM_PORT_REGS*i; + xhci_dbg(xhci, "USB 2.0 port at index %u, " + "addr = %p\n", i, + xhci->usb2_ports[port_index]); + port_index++; + } } if (xhci->num_usb3_ports) { xhci->usb3_ports = kmalloc(sizeof(*xhci->usb3_ports)* -- cgit v0.10.2 From 5363cdc3c5da9bd431552cf5989ab481596f0c6d Mon Sep 17 00:00:00 2001 From: Florian Faber Date: Wed, 1 Dec 2010 10:11:08 +0100 Subject: USB: ftdi_sio: Add D.O.Tec PID Add FTDI PID to identify D.O.Tec devices correctly. Signed-off-by: Florian Faber Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index 6a50965..2dec500 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -796,6 +796,7 @@ static struct usb_device_id id_table_combined [] = { { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_LOGBOOKML_PID) }, { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_LS_LOGBOOK_PID) }, { USB_DEVICE(FTDI_VID, FTDI_SCIENCESCOPE_HS_LOGBOOK_PID) }, + { USB_DEVICE(FTDI_VID, FTDI_DOTEC_PID) }, { USB_DEVICE(QIHARDWARE_VID, MILKYMISTONE_JTAGSERIAL_PID), .driver_info = (kernel_ulong_t)&ftdi_jtag_quirk }, { }, /* Optional parameter entry */ diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h index 1286f1e2..bf08672 100644 --- a/drivers/usb/serial/ftdi_sio_ids.h +++ b/drivers/usb/serial/ftdi_sio_ids.h @@ -1081,6 +1081,11 @@ #define MJSG_HD_RADIO_PID 0x937C /* + * D.O.Tec products (http://www.directout.eu) + */ +#define FTDI_DOTEC_PID 0x9868 + +/* * Xverve Signalyzer tools (http://www.signalyzer.com/) */ #define XVERVE_SIGNALYZER_ST_PID 0xBCA0 -- cgit v0.10.2 From 57a7872fa0f03e90be0fa224b9ea533f5b03ee4f Mon Sep 17 00:00:00 2001 From: Kevin Granade Date: Fri, 10 Dec 2010 23:04:02 -0800 Subject: Input: wacom - add another Bamboo Pen ID (0xd4) Add the features struct and device table entry to enable yet another version of Wacom Bamboo Pen (CTL460, Product ID 0xD4). Signed-off-by: Kevin Granade Acked-by: Ping Cheng Signed-off-by: Dmitry Torokhov diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c index 4852b44..435b0af 100644 --- a/drivers/input/tablet/wacom_wac.c +++ b/drivers/input/tablet/wacom_wac.c @@ -1436,6 +1436,8 @@ static struct wacom_features wacom_features_0xD2 = { "Wacom Bamboo Craft", WACOM_PKGLEN_BBFUN, 14720, 9200, 1023, 63, BAMBOO_PT }; static struct wacom_features wacom_features_0xD3 = { "Wacom Bamboo 2FG 6x8", WACOM_PKGLEN_BBFUN, 21648, 13530, 1023, 63, BAMBOO_PT }; +static const struct wacom_features wacom_features_0xD4 = + { "Wacom Bamboo Pen", WACOM_PKGLEN_BBFUN, 14720, 9200, 255, 63, BAMBOO_PT }; static struct wacom_features wacom_features_0xD8 = { "Wacom Bamboo Comic 2FG", WACOM_PKGLEN_BBFUN, 21648, 13530, 1023, 63, BAMBOO_PT }; static struct wacom_features wacom_features_0xDA = @@ -1510,6 +1512,7 @@ const struct usb_device_id wacom_ids[] = { { USB_DEVICE_WACOM(0xD1) }, { USB_DEVICE_WACOM(0xD2) }, { USB_DEVICE_WACOM(0xD3) }, + { USB_DEVICE_WACOM(0xD4) }, { USB_DEVICE_WACOM(0xD8) }, { USB_DEVICE_WACOM(0xDA) }, { USB_DEVICE_WACOM(0xDB) }, -- cgit v0.10.2 From f1c18071ad70e2a78ab31fc26a18fcfa954a05c6 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 13 Dec 2010 12:43:23 +0100 Subject: x86: HPET: Chose a paranoid safe value for the ETIME check commit 995bd3bb5 (x86: Hpet: Avoid the comparator readback penalty) chose 8 HPET cycles as a safe value for the ETIME check, as we had the confirmation that the posted write to the comparator register is delayed by two HPET clock cycles on Intel chipsets which showed readback problems. After that patch hit mainline we got reports from machines with newer AMD chipsets which seem to have an even longer delay. See http://thread.gmane.org/gmane.linux.kernel/1054283 and http://thread.gmane.org/gmane.linux.kernel/1069458 for further information. Boris tried to come up with an ACPI based selection of the minimum HPET cycles, but this failed on a couple of test machines. And of course we did not get any useful information from the hardware folks. For now our only option is to chose a paranoid high and safe value for the minimum HPET cycles used by the ETIME check. Adjust the minimum ns value for the HPET clockevent accordingly. Reported-Bistected-and-Tested-by: Markus Trippelsdorf Signed-off-by: Thomas Gleixner LKML-Reference: Cc: Simon Kirby Cc: Borislav Petkov Cc: Andreas Herrmann Cc: John Stultz diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index ae03cab..4ff5968 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -27,6 +27,9 @@ #define HPET_DEV_FSB_CAP 0x1000 #define HPET_DEV_PERI_CAP 0x2000 +#define HPET_MIN_CYCLES 128 +#define HPET_MIN_PROG_DELTA (HPET_MIN_CYCLES + (HPET_MIN_CYCLES >> 1)) + #define EVT_TO_HPET_DEV(evt) container_of(evt, struct hpet_dev, evt) /* @@ -299,8 +302,9 @@ static void hpet_legacy_clockevent_register(void) /* Calculate the min / max delta */ hpet_clockevent.max_delta_ns = clockevent_delta2ns(0x7FFFFFFF, &hpet_clockevent); - /* 5 usec minimum reprogramming delta. */ - hpet_clockevent.min_delta_ns = 5000; + /* Setup minimum reprogramming delta. */ + hpet_clockevent.min_delta_ns = clockevent_delta2ns(HPET_MIN_PROG_DELTA, + &hpet_clockevent); /* * Start hpet with the boot cpu mask and make it @@ -393,22 +397,24 @@ static int hpet_next_event(unsigned long delta, * the wraparound into account) nor a simple count down event * mode. Further the write to the comparator register is * delayed internally up to two HPET clock cycles in certain - * chipsets (ATI, ICH9,10). We worked around that by reading - * back the compare register, but that required another - * workaround for ICH9,10 chips where the first readout after - * write can return the old stale value. We already have a - * minimum delta of 5us enforced, but a NMI or SMI hitting + * chipsets (ATI, ICH9,10). Some newer AMD chipsets have even + * longer delays. We worked around that by reading back the + * compare register, but that required another workaround for + * ICH9,10 chips where the first readout after write can + * return the old stale value. We already had a minimum + * programming delta of 5us enforced, but a NMI or SMI hitting * between the counter readout and the comparator write can * move us behind that point easily. Now instead of reading * the compare register back several times, we make the ETIME * decision based on the following: Return ETIME if the - * counter value after the write is less than 8 HPET cycles + * counter value after the write is less than HPET_MIN_CYCLES * away from the event or if the counter is already ahead of - * the event. + * the event. The minimum programming delta for the generic + * clockevents code is set to 1.5 * HPET_MIN_CYCLES. */ res = (s32)(cnt - hpet_readl(HPET_COUNTER)); - return res < 8 ? -ETIME : 0; + return res < HPET_MIN_CYCLES ? -ETIME : 0; } static void hpet_legacy_set_mode(enum clock_event_mode mode, -- cgit v0.10.2 From 862af8adbe6b9ccb7c00c13717b1f92465f79aa2 Mon Sep 17 00:00:00 2001 From: Jarkko Nikula Date: Fri, 10 Dec 2010 20:53:55 +0200 Subject: ASoC: Fix bias power down of non-DAPM codec Currently bias of non-DAPM codec will be powered down (standby/off) whenever there is a stream stop. This is wrong in simultaneous playback/capture since the bias is put down immediately after stopping the first stream. Fix this by using the codec->active count when figuring out the needed bias level after stream stop. Signed-off-by: Jarkko Nikula Acked-by: Liam Girdwood Signed-off-by: Mark Brown diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c index 75ed649..c721502 100644 --- a/sound/soc/soc-dapm.c +++ b/sound/soc/soc-dapm.c @@ -944,6 +944,9 @@ static int dapm_power_widgets(struct snd_soc_codec *codec, int event) case SND_SOC_DAPM_STREAM_RESUME: sys_power = 1; break; + case SND_SOC_DAPM_STREAM_STOP: + sys_power = !!codec->active; + break; case SND_SOC_DAPM_STREAM_SUSPEND: sys_power = 0; break; -- cgit v0.10.2 From de2a8cf98ecdde25231d6c5e7901e2cffaf32af9 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Mon, 13 Dec 2010 16:01:38 -0800 Subject: x86, gcc-4.6: Use gcc -m options when building vdso The vdso Makefile passes linker-style -m options not to the linker but to gcc. This happens to work with earlier gcc, but fails with gcc 4.6. Pass gcc-style -m options, instead. Note: all currently supported versions of gcc supports -m32, so there is no reason to conditionalize it any more. Reported-by: H. J. Lu Signed-off-by: H. Peter Anvin LKML-Reference: Cc: diff --git a/arch/x86/vdso/Makefile b/arch/x86/vdso/Makefile index 4a2afa1..b6552b1 100644 --- a/arch/x86/vdso/Makefile +++ b/arch/x86/vdso/Makefile @@ -25,7 +25,7 @@ targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y) export CPPFLAGS_vdso.lds += -P -C -VDSO_LDFLAGS_vdso.lds = -m elf_x86_64 -Wl,-soname=linux-vdso.so.1 \ +VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \ -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so @@ -69,7 +69,7 @@ vdso32.so-$(VDSO32-y) += sysenter vdso32-images = $(vdso32.so-y:%=vdso32-%.so) CPPFLAGS_vdso32.lds = $(CPPFLAGS_vdso.lds) -VDSO_LDFLAGS_vdso32.lds = -m elf_i386 -Wl,-soname=linux-gate.so.1 +VDSO_LDFLAGS_vdso32.lds = -m32 -Wl,-soname=linux-gate.so.1 # This makes sure the $(obj) subdirectory exists even though vdso32/ # is not a kbuild sub-make subdirectory. -- cgit v0.10.2 From 53dde5f385bc56e312f78b7cb25ffaf8efd4735d Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Tue, 16 Nov 2010 13:23:50 -0800 Subject: bootmem: Add alloc_bootmem_align() Add an alloc_bootmem_align() interface to allocate bootmem with specified alignment. This is necessary to be able to allocate the xsave area in a subsequent patch. Signed-off-by: Suresh Siddha LKML-Reference: <20101116212441.977574826@sbsiddha-MOBL3.sc.intel.com> Acked-by: H. Peter Anvin Signed-off-by: H. Peter Anvin Cc: diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 266ab92..499dfe9 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -105,6 +105,8 @@ extern void *__alloc_bootmem_low_node(pg_data_t *pgdat, #define alloc_bootmem(x) \ __alloc_bootmem(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) +#define alloc_bootmem_align(x, align) \ + __alloc_bootmem(x, align, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_nopanic(x) \ __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, __pa(MAX_DMA_ADDRESS)) #define alloc_bootmem_pages(x) \ -- cgit v0.10.2 From 10340ae130fb70352eae1ae8a00b7906d91bf166 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Tue, 16 Nov 2010 13:23:51 -0800 Subject: x86, xsave: Use alloc_bootmem_align() instead of alloc_bootmem() Alignment of alloc_bootmem() depends on the value of L1_CACHE_SHIFT. What we need here, however, is 64 byte alignment. Use alloc_bootmem_align() and explicitly specify the alignment instead. This fixes a kernel boot crash reported by Jody when the cpu in .config is set to MPENTIUMII but the kernel is booted on a xsave-capable CPU. Reported-by: Jody Bruchon Signed-off-by: Suresh Siddha LKML-Reference: <20101116212442.059967454@sbsiddha-MOBL3.sc.intel.com> Signed-off-by: H. Peter Anvin Cc: diff --git a/arch/x86/kernel/xsave.c b/arch/x86/kernel/xsave.c index 9c253bd..5471285 100644 --- a/arch/x86/kernel/xsave.c +++ b/arch/x86/kernel/xsave.c @@ -394,7 +394,8 @@ static void __init setup_xstate_init(void) * Setup init_xstate_buf to represent the init state of * all the features managed by the xsave */ - init_xstate_buf = alloc_bootmem(xstate_size); + init_xstate_buf = alloc_bootmem_align(xstate_size, + __alignof__(struct xsave_struct)); init_xstate_buf->i387.mxcsr = MXCSR_DEFAULT; clts(); -- cgit v0.10.2 From 254e42006c893f45bca48f313536fcba12206418 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Mon, 6 Dec 2010 12:26:30 -0800 Subject: x86, vt-d: Quirk for masking vtd spec errors to platform error handling logic On platforms with Intel 7500 chipset, there were some reports of system hang/NMI's during kexec/kdump in the presence of interrupt-remapping enabled. During kdump, there is a window where the devices might be still using old kernel's interrupt information, while the kdump kernel is coming up. This can cause vt-d faults as the interrupt configuration from the old kernel map to null IRTE entries in the new kernel etc. (with out interrupt-remapping enabled, we still have the same issue but in this case we will see benign spurious interrupt hit the new kernel). Based on platform config settings, these platforms seem to generate NMI/SMI when a vt-d fault happens and there were reports that the resulting SMI causes the system to hang. Fix it by masking vt-d spec defined errors to platform error reporting logic. VT-d spec related errors are already handled by the VT-d OS code, so need to report the same error through other channels. Signed-off-by: Suresh Siddha LKML-Reference: <1291667190.2675.8.camel@sbsiddha-MOBL3.sc.intel.com> Cc: stable@kernel.org [v2.6.32+] Reported-by: Max Asbock Reported-and-tested-by: Takao Indoh Acked-by: Chris Wright Acked-by: Kenji Kaneshige Signed-off-by: H. Peter Anvin diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 6f9350c..36191ed 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2764,6 +2764,29 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_m DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832); #endif /*CONFIG_MMC_RICOH_MMC*/ +#if defined(CONFIG_DMAR) || defined(CONFIG_INTR_REMAP) +#define VTUNCERRMSK_REG 0x1ac +#define VTD_MSK_SPEC_ERRORS (1 << 31) +/* + * This is a quirk for masking vt-d spec defined errors to platform error + * handling logic. With out this, platforms using Intel 7500, 5500 chipsets + * (and the derivative chipsets like X58 etc) seem to generate NMI/SMI (based + * on the RAS config settings of the platform) when a vt-d fault happens. + * The resulting SMI caused the system to hang. + * + * VT-d spec related errors are already handled by the VT-d OS code, so no + * need to report the same error through other channels. + */ +static void vtd_mask_spec_errors(struct pci_dev *dev) +{ + u32 word; + + pci_read_config_dword(dev, VTUNCERRMSK_REG, &word); + pci_write_config_dword(dev, VTUNCERRMSK_REG, word | VTD_MSK_SPEC_ERRORS); +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x342e, vtd_mask_spec_errors); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x3c28, vtd_mask_spec_errors); +#endif static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f, struct pci_fixup *end) -- cgit v0.10.2 From 086e8ced65d9bcc4a8e8f1cd39b09640f2883f90 Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Wed, 1 Dec 2010 09:40:32 -0800 Subject: x86, vt-d: Fix the vt-d fault handling irq migration in the x2apic mode In x2apic mode, we need to set the upper address register of the fault handling interrupt register of the vt-d hardware. Without this irq migration of the vt-d fault handling interrupt is broken. Signed-off-by: Kenji Kaneshige LKML-Reference: <1291225233.2648.39.camel@sbsiddha-MOBL3> Signed-off-by: Suresh Siddha Cc: stable@kernel.org [v2.6.32+] Acked-by: Chris Wright Tested-by: Takao Indoh Signed-off-by: H. Peter Anvin diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 226060e..fadcd74 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -3412,6 +3412,7 @@ dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, msg.data |= MSI_DATA_VECTOR(cfg->vector); msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; msg.address_lo |= MSI_ADDR_DEST_ID(dest); + msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest); dmar_msi_write(irq, &msg); -- cgit v0.10.2 From 7f7fbf45c6b748074546f7f16b9488ca71de99c1 Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Tue, 30 Nov 2010 22:22:28 -0800 Subject: x86: Enable the intr-remap fault handling after local APIC setup Interrupt-remapping gets enabled very early in the boot, as it determines the apic mode that the processor can use. And the current code enables the vt-d fault handling before the setup_local_APIC(). And hence the APIC LDR registers and data structure in the memory may not be initialized. So the vt-d fault handling in logical xapic/x2apic modes were broken. Fix this by enabling the vt-d fault handling in the end_local_APIC_setup() A cleaner fix of enabling fault handling while enabling intr-remapping will be addressed for v2.6.38. [ Enabling intr-remapping determines the usage of x2apic mode and the apic mode determines the fault-handling configuration. ] Signed-off-by: Kenji Kaneshige LKML-Reference: <20101201062244.541996375@intel.com> Signed-off-by: Suresh Siddha Cc: stable@kernel.org [v2.6.32+] Acked-by: Chris Wright Signed-off-by: H. Peter Anvin diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 3f838d5..7821813 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1389,6 +1389,14 @@ void __cpuinit end_local_APIC_setup(void) setup_apic_nmi_watchdog(NULL); apic_pm_activate(); + + /* + * Now that local APIC setup is completed for BP, configure the fault + * handling for interrupt remapping. + */ + if (!smp_processor_id() && intr_remapping_enabled) + enable_drhd_fault_handling(); + } #ifdef CONFIG_X86_X2APIC diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c index f9e4e6a..d8c4a6f 100644 --- a/arch/x86/kernel/apic/probe_64.c +++ b/arch/x86/kernel/apic/probe_64.c @@ -79,13 +79,6 @@ void __init default_setup_apic_routing(void) /* need to update phys_pkg_id */ apic->phys_pkg_id = apicid_phys_pkg_id; } - - /* - * Now that apic routing model is selected, configure the - * fault handling for intr remapping. - */ - if (intr_remapping_enabled) - enable_drhd_fault_handling(); } /* Same for both flat and physical. */ -- cgit v0.10.2 From 7f99d946e71e71d484b7543b49e990508e70d0c0 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Tue, 30 Nov 2010 22:22:29 -0800 Subject: x86, vt-d: Handle previous faults after enabling fault handling Fault handling is getting enabled after enabling the interrupt-remapping (as the success of interrupt-remapping can affect the apic mode and hence the fault handling mode). Hence there can potentially be some faults between the window of enabling interrupt-remapping in the vt-d and the fault-handling of the vt-d units. Handle any previous faults after enabling the vt-d fault handling. For v2.6.38 cleanup, need to check if we can remove the dmar_fault() in the enable_intr_remapping() and see if we can enable fault handling along with enabling intr-remapping. Signed-off-by: Suresh Siddha LKML-Reference: <20101201062244.630417138@intel.com> Cc: stable@kernel.org [v2.6.32+] Acked-by: Chris Wright Signed-off-by: H. Peter Anvin diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index 0157708..09933eb 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -1417,6 +1417,11 @@ int __init enable_drhd_fault_handling(void) (unsigned long long)drhd->reg_base_addr, ret); return -1; } + + /* + * Clear any previous faults. + */ + dmar_fault(iommu->irq, iommu); } return 0; -- cgit v0.10.2 From d96c9043d1588f04c7f467167f653c07d83232d5 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Mon, 13 Dec 2010 20:30:28 -0800 Subject: ceph: fix msgr_init error path create_workqueue() returns NULL on failure. Signed-off-by: Sage Weil diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 1c7a2ec..b6ff4a1 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -97,11 +97,9 @@ struct workqueue_struct *ceph_msgr_wq; int ceph_msgr_init(void) { ceph_msgr_wq = create_workqueue("ceph-msgr"); - if (IS_ERR(ceph_msgr_wq)) { - int ret = PTR_ERR(ceph_msgr_wq); - pr_err("msgr_init failed to create workqueue: %d\n", ret); - ceph_msgr_wq = NULL; - return ret; + if (!ceph_msgr_wq) { + pr_err("msgr_init failed to create workqueue\n"); + return -ENOMEM; } return 0; } -- cgit v0.10.2 From fe67b24010c66a14d84117ac67d23ed1bcb18a71 Mon Sep 17 00:00:00 2001 From: David Henningsson Date: Wed, 15 Dec 2010 08:01:46 +0100 Subject: ALSA: HDA: Fix auto-mute on Lenovo Edge 14 BugLink: http://launchpad.net/bugs/690530 The SKU value of this machine dictates that auto-mute should be disabled. Since the SKU value is similar to the PCI SSID, the most likely conclusion is that the SKU value should be ignored. Signed-off-by: David Henningsson Signed-off-by: Takashi Iwai diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 2d7d7de..e5fbd00 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -14800,6 +14800,7 @@ static int alc269_resume(struct hda_codec *codec) enum { ALC269_FIXUP_SONY_VAIO, ALC269_FIXUP_DELL_M101Z, + ALC269_FIXUP_LENOVO_EDGE14, }; static const struct alc_fixup alc269_fixups[] = { @@ -14817,11 +14818,15 @@ static const struct alc_fixup alc269_fixups[] = { {} } }, + [ALC269_FIXUP_LENOVO_EDGE14] = { + .sku = ALC_FIXUP_SKU_IGNORE, + }, }; static struct snd_pci_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK_VENDOR(0x104d, "Sony VAIO", ALC269_FIXUP_SONY_VAIO), SND_PCI_QUIRK(0x1028, 0x0470, "Dell M101z", ALC269_FIXUP_DELL_M101Z), + SND_PCI_QUIRK(0x17aa, 0x21b8, "Thinkpad Edge 14", ALC269_FIXUP_LENOVO_EDGE14), {} }; -- cgit v0.10.2 From ab4e0192196b8d4e43a3945742d4996da934a86f Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 14 Dec 2010 23:53:21 -0800 Subject: Input: define separate EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2 The desire to keep old names for the EVIOCGKEYCODE/EVIOCSKEYCODE while extending them to support large scancodes was a mistake. While we tried to keep ABI intact (and we succeeded in doing that, programs compiled on older kernels will work on newer ones) there is still a problem with recompiling existing software with newer kernel headers. New kernel headers will supply updated ioctl numbers and kernel will expect that userspace will use struct input_keymap_entry to set and retrieve keymap data. But since the names of ioctls are still the same userspace will happily compile even if not adjusted to make use of the new structure and will start miraculously fail in the field. To avoid this issue let's revert EVIOCGKEYCODE/EVIOCSKEYCODE definitions and add EVIOCGKEYCODE_V2/EVIOCSKEYCODE_V2 so that userspace can explicitly select the style of ioctls it wants to employ. Reviewed-by: Henrik Rydberg Acked-by: Jarod Wilson Acked-by: Mauro Carvalho Chehab Signed-off-by: Dmitry Torokhov diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index e3f7fc6..68f09a8 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -534,76 +534,73 @@ static int handle_eviocgbit(struct input_dev *dev, } #undef OLD_KEY_MAX -static int evdev_handle_get_keycode(struct input_dev *dev, - void __user *p, size_t size) +static int evdev_handle_get_keycode(struct input_dev *dev, void __user *p) { - struct input_keymap_entry ke; + struct input_keymap_entry ke = { + .len = sizeof(unsigned int), + .flags = 0, + }; + int __user *ip = (int __user *)p; int error; - memset(&ke, 0, sizeof(ke)); - - if (size == sizeof(unsigned int[2])) { - /* legacy case */ - int __user *ip = (int __user *)p; + /* legacy case */ + if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) + return -EFAULT; - if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) - return -EFAULT; + error = input_get_keycode(dev, &ke); + if (error) + return error; - ke.len = sizeof(unsigned int); - ke.flags = 0; + if (put_user(ke.keycode, ip + 1)) + return -EFAULT; - error = input_get_keycode(dev, &ke); - if (error) - return error; + return 0; +} - if (put_user(ke.keycode, ip + 1)) - return -EFAULT; +static int evdev_handle_get_keycode_v2(struct input_dev *dev, void __user *p) +{ + struct input_keymap_entry ke; + int error; - } else { - size = min(size, sizeof(ke)); + if (copy_from_user(&ke, p, sizeof(ke))) + return -EFAULT; - if (copy_from_user(&ke, p, size)) - return -EFAULT; + error = input_get_keycode(dev, &ke); + if (error) + return error; - error = input_get_keycode(dev, &ke); - if (error) - return error; + if (copy_to_user(p, &ke, sizeof(ke))) + return -EFAULT; - if (copy_to_user(p, &ke, size)) - return -EFAULT; - } return 0; } -static int evdev_handle_set_keycode(struct input_dev *dev, - void __user *p, size_t size) +static int evdev_handle_set_keycode(struct input_dev *dev, void __user *p) { - struct input_keymap_entry ke; - - memset(&ke, 0, sizeof(ke)); + struct input_keymap_entry ke = { + .len = sizeof(unsigned int), + .flags = 0, + }; + int __user *ip = (int __user *)p; - if (size == sizeof(unsigned int[2])) { - /* legacy case */ - int __user *ip = (int __user *)p; + if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) + return -EFAULT; - if (copy_from_user(ke.scancode, p, sizeof(unsigned int))) - return -EFAULT; + if (get_user(ke.keycode, ip + 1)) + return -EFAULT; - if (get_user(ke.keycode, ip + 1)) - return -EFAULT; + return input_set_keycode(dev, &ke); +} - ke.len = sizeof(unsigned int); - ke.flags = 0; +static int evdev_handle_set_keycode_v2(struct input_dev *dev, void __user *p) +{ + struct input_keymap_entry ke; - } else { - size = min(size, sizeof(ke)); + if (copy_from_user(&ke, p, sizeof(ke))) + return -EFAULT; - if (copy_from_user(&ke, p, size)) - return -EFAULT; - - if (ke.len > sizeof(ke.scancode)) - return -EINVAL; - } + if (ke.len > sizeof(ke.scancode)) + return -EINVAL; return input_set_keycode(dev, &ke); } @@ -669,6 +666,18 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, return evdev_grab(evdev, client); else return evdev_ungrab(evdev, client); + + case EVIOCGKEYCODE: + return evdev_handle_get_keycode(dev, p); + + case EVIOCSKEYCODE: + return evdev_handle_set_keycode(dev, p); + + case EVIOCGKEYCODE_V2: + return evdev_handle_get_keycode_v2(dev, p); + + case EVIOCSKEYCODE_V2: + return evdev_handle_set_keycode_v2(dev, p); } size = _IOC_SIZE(cmd); @@ -708,12 +717,6 @@ static long evdev_do_ioctl(struct file *file, unsigned int cmd, return -EFAULT; return error; - - case EVIOC_MASK_SIZE(EVIOCGKEYCODE): - return evdev_handle_get_keycode(dev, p, size); - - case EVIOC_MASK_SIZE(EVIOCSKEYCODE): - return evdev_handle_set_keycode(dev, p, size); } /* Multi-number variable-length handlers */ diff --git a/include/linux/input.h b/include/linux/input.h index a8af21d..9777668 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -104,8 +104,10 @@ struct input_keymap_entry { #define EVIOCGREP _IOR('E', 0x03, unsigned int[2]) /* get repeat settings */ #define EVIOCSREP _IOW('E', 0x03, unsigned int[2]) /* set repeat settings */ -#define EVIOCGKEYCODE _IOR('E', 0x04, struct input_keymap_entry) /* get keycode */ -#define EVIOCSKEYCODE _IOW('E', 0x04, struct input_keymap_entry) /* set keycode */ +#define EVIOCGKEYCODE _IOR('E', 0x04, unsigned int[2]) /* get keycode */ +#define EVIOCGKEYCODE_V2 _IOR('E', 0x04, struct input_keymap_entry) +#define EVIOCSKEYCODE _IOW('E', 0x04, unsigned int[2]) /* set keycode */ +#define EVIOCSKEYCODE_V2 _IOW('E', 0x04, struct input_keymap_entry) #define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */ #define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */ -- cgit v0.10.2 From ac612407932be18697b5ae9da0a80f138b8bea8e Mon Sep 17 00:00:00 2001 From: David Henningsson Date: Wed, 15 Dec 2010 09:18:18 +0100 Subject: ALSA: HDA: Enable subwoofer on Asus G73Jw Set default association/sequence right on pin 0x17 in order for the automatic parser to recognize the subwoofer correctly. Signed-off-by: David Henningsson Signed-off-by: Takashi Iwai diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index e5fbd00..8e7948f 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -14801,6 +14801,7 @@ enum { ALC269_FIXUP_SONY_VAIO, ALC269_FIXUP_DELL_M101Z, ALC269_FIXUP_LENOVO_EDGE14, + ALC269_FIXUP_ASUS_G73JW, }; static const struct alc_fixup alc269_fixups[] = { @@ -14821,12 +14822,19 @@ static const struct alc_fixup alc269_fixups[] = { [ALC269_FIXUP_LENOVO_EDGE14] = { .sku = ALC_FIXUP_SKU_IGNORE, }, + [ALC269_FIXUP_ASUS_G73JW] = { + .pins = (const struct alc_pincfg[]) { + { 0x17, 0x99130111 }, /* subwoofer */ + { } + } + }, }; static struct snd_pci_quirk alc269_fixup_tbl[] = { SND_PCI_QUIRK_VENDOR(0x104d, "Sony VAIO", ALC269_FIXUP_SONY_VAIO), SND_PCI_QUIRK(0x1028, 0x0470, "Dell M101z", ALC269_FIXUP_DELL_M101Z), SND_PCI_QUIRK(0x17aa, 0x21b8, "Thinkpad Edge 14", ALC269_FIXUP_LENOVO_EDGE14), + SND_PCI_QUIRK(0x1043, 0x1a13, "Asus G73Jw", ALC269_FIXUP_ASUS_G73JW), {} }; -- cgit v0.10.2 From 4422c04bbb09f1864e2ce27296457f86d4167fe2 Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Tue, 14 Dec 2010 14:16:59 +0200 Subject: OMAP: DSS: VRAM: Align start & size of vram to 2M Align the start address and size of VRAM area to 2M as per comments from Russell King: > > So, why SZ_2M? > > Firstly, that's the granularity which we allocate page tables - one > Linux page table covers 2MB of memory. We want to avoid creating page > tables for the main memory mapping as that increases TLB pressure through > the use of additional TLB entries, and more page table walks. > > Plus, we never used to allow the kernel's direct memory mapping to be > mapped at anything less than section size - this restriction has since > been lifted due to OMAP SRAM problems, but I'd rather we stuck with it > to ensure that we have proper behaviour from all parts of the system. > > Secondly, we don't want to end up with lots of fragmentation at the end > of the memory mapping as that'll reduce performance, not only by making > the pfn_valid() search more expensive. > > Emsuring a minimum allocation size and alignment makes sure that the > regions can be coalesced together into one block, and minimises run-time > expenses. > > So please, 2MB, or if you object, at the _very_ _least_ 1MB. But > definitely not PAGE_SIZE. Signed-off-by: Tomi Valkeinen Acked-by: Tony Lindgren diff --git a/drivers/video/omap2/vram.c b/drivers/video/omap2/vram.c index 2fd7e52..9441e2e 100644 --- a/drivers/video/omap2/vram.c +++ b/drivers/video/omap2/vram.c @@ -551,7 +551,7 @@ void __init omap_vram_reserve_sdram_memblock(void) if (!size) return; - size = PAGE_ALIGN(size); + size = ALIGN(size, SZ_2M); if (paddr) { if (paddr & ~PAGE_MASK) { @@ -576,7 +576,7 @@ void __init omap_vram_reserve_sdram_memblock(void) return; } } else { - paddr = memblock_alloc(size, PAGE_SIZE); + paddr = memblock_alloc(size, SZ_2M); } memblock_free(paddr, size); -- cgit v0.10.2 From b99ddbf83c064382b145d2156cc819d1eb4fc54d Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Tue, 14 Dec 2010 14:39:06 +0200 Subject: OMAP: OMAPFB: disable old omapfb for OMAP4 builds Build fails when OMAP4 and FB_OMAP are defined: drivers/built-in.o: In function `omapfb_do_probe': drivers/video/omap/omapfb_main.c:1773: undefined reference to `omap2_int_ctrl' Old omapfb does not work on OMAP4, and never will. Change the omapfb build dependency so that old omapfb depends on OMAP1/2/3, fixing the build for plain OMAP4 builds. Reported-by: Russell King Signed-off-by: Tomi Valkeinen diff --git a/drivers/video/omap/Kconfig b/drivers/video/omap/Kconfig index 455c605..083c8fe 100644 --- a/drivers/video/omap/Kconfig +++ b/drivers/video/omap/Kconfig @@ -1,7 +1,7 @@ config FB_OMAP tristate "OMAP frame buffer support (EXPERIMENTAL)" - depends on FB && ARCH_OMAP && (OMAP2_DSS = "n") - + depends on FB && (OMAP2_DSS = "n") + depends on ARCH_OMAP1 || ARCH_OMAP2 || ARCH_OMAP3 select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT -- cgit v0.10.2 From 62731fa0c893515dc6cbc3e0a2879a92793c735f Mon Sep 17 00:00:00 2001 From: Alexey Zaytsev Date: Mon, 22 Nov 2010 00:33:03 +0000 Subject: fanotify: split version into version and metadata_len To implement per event type optional headers we are interested in knowing how long the metadata structure is. This patch slits the __u32 version field into a __u8 version and a __u16 metadata_len field (with __u8 left over). This should allow for backwards compat ABI. Signed-off-by: Alexey Zaytsev [rewrote descrtion and changed object sizes and ordering - eparis] Signed-off-by: Eric Paris diff --git a/include/linux/fanotify.h b/include/linux/fanotify.h index c732243..6c6133f 100644 --- a/include/linux/fanotify.h +++ b/include/linux/fanotify.h @@ -83,11 +83,13 @@ FAN_ALL_PERM_EVENTS |\ FAN_Q_OVERFLOW) -#define FANOTIFY_METADATA_VERSION 2 +#define FANOTIFY_METADATA_VERSION 3 struct fanotify_event_metadata { __u32 event_len; - __u32 vers; + __u8 vers; + __u8 reserved; + __u16 metadata_len; __aligned_u64 mask; __s32 fd; __s32 pid; -- cgit v0.10.2 From 7d13162332f2b67a941d18cee20f1c0413e020de Mon Sep 17 00:00:00 2001 From: Eric Paris Date: Tue, 7 Dec 2010 15:27:57 -0500 Subject: fanotify: fill in the metadata_len field on struct fanotify_event_metadata The fanotify_event_metadata now has a field which is supposed to indicate the length of the metadata portion of the event. Fill in that field as well. Based-in-part-on-patch-by: Alexey Zaytsev Signed-off-by: Eric Paris diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c index dccd798..8b61220 100644 --- a/fs/notify/fanotify/fanotify_user.c +++ b/fs/notify/fanotify/fanotify_user.c @@ -116,6 +116,7 @@ static int fill_event_metadata(struct fsnotify_group *group, group, metadata, event); metadata->event_len = FAN_EVENT_METADATA_LEN; + metadata->metadata_len = FAN_EVENT_METADATA_LEN; metadata->vers = FANOTIFY_METADATA_VERSION; metadata->mask = event->mask & FAN_ALL_OUTGOING_EVENTS; metadata->pid = pid_vnr(event->tgid); @@ -275,10 +276,11 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group, goto out_close_fd; ret = -EFAULT; - if (copy_to_user(buf, &fanotify_event_metadata, FAN_EVENT_METADATA_LEN)) + if (copy_to_user(buf, &fanotify_event_metadata, + fanotify_event_metadata.event_len)) goto out_kill_access_response; - return FAN_EVENT_METADATA_LEN; + return fanotify_event_metadata.event_len; out_kill_access_response: remove_access_response(group, event, fd); -- cgit v0.10.2 From ab226e21ad34f6ef52e00d2ab399d2364b4cdfee Mon Sep 17 00:00:00 2001 From: Henry C Chang Date: Wed, 15 Dec 2010 20:41:54 -0800 Subject: ceph: fix direct-io on non-page-aligned buffers The user buffer may be 512-byte aligned, not page-aligned. We were assuming the buffer was page-aligned and only accounting for non-page-aligned io offsets. Signed-off-by: Henry C Chang Signed-off-by: Sage Weil diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 8d79b89..e860d8f 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -282,7 +282,8 @@ int ceph_release(struct inode *inode, struct file *file) static int striped_read(struct inode *inode, u64 off, u64 len, struct page **pages, int num_pages, - int *checkeof, bool align_to_pages) + int *checkeof, bool align_to_pages, + unsigned long buf_align) { struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_inode_info *ci = ceph_inode(inode); @@ -307,7 +308,7 @@ static int striped_read(struct inode *inode, more: if (align_to_pages) - page_align = (pos - io_align) & ~PAGE_MASK; + page_align = (pos - io_align + buf_align) & ~PAGE_MASK; else page_align = pos & ~PAGE_MASK; this_len = left; @@ -376,16 +377,18 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, struct inode *inode = file->f_dentry->d_inode; struct page **pages; u64 off = *poff; - int num_pages = calc_pages_for(off, len); - int ret; + int num_pages, ret; dout("sync_read on file %p %llu~%u %s\n", file, off, len, (file->f_flags & O_DIRECT) ? "O_DIRECT" : ""); - if (file->f_flags & O_DIRECT) + if (file->f_flags & O_DIRECT) { + num_pages = calc_pages_for((unsigned long)data, len); pages = ceph_get_direct_page_vector(data, num_pages); - else + } else { + num_pages = calc_pages_for(off, len); pages = ceph_alloc_page_vector(num_pages, GFP_NOFS); + } if (IS_ERR(pages)) return PTR_ERR(pages); @@ -400,7 +403,8 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, goto done; ret = striped_read(inode, off, len, pages, num_pages, checkeof, - file->f_flags & O_DIRECT); + file->f_flags & O_DIRECT, + (unsigned long)data & ~PAGE_MASK); if (ret >= 0 && (file->f_flags & O_DIRECT) == 0) ret = ceph_copy_page_vector_to_user(pages, data, off, ret); @@ -456,6 +460,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, int do_sync = 0; int check_caps = 0; int page_align, io_align; + unsigned long buf_align; int ret; struct timespec mtime = CURRENT_TIME; @@ -471,6 +476,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, pos = *offset; io_align = pos & ~PAGE_MASK; + buf_align = (unsigned long)data & ~PAGE_MASK; ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left); if (ret < 0) @@ -496,12 +502,15 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data, */ more: len = left; - if (file->f_flags & O_DIRECT) + if (file->f_flags & O_DIRECT) { /* write from beginning of first page, regardless of io alignment */ - page_align = (pos - io_align) & ~PAGE_MASK; - else + page_align = (pos - io_align + buf_align) & ~PAGE_MASK; + num_pages = calc_pages_for((unsigned long)data, len); + } else { page_align = pos & ~PAGE_MASK; + num_pages = calc_pages_for(pos, len); + } req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout, ceph_vino(inode), pos, &len, CEPH_OSD_OP_WRITE, flags, @@ -512,8 +521,6 @@ more: if (!req) return -ENOMEM; - num_pages = calc_pages_for(pos, len); - if (file->f_flags & O_DIRECT) { pages = ceph_get_direct_page_vector(data, num_pages); if (IS_ERR(pages)) { -- cgit v0.10.2 From 947b10ae0aeda89fc066a7470fdba55f72b0b8fc Mon Sep 17 00:00:00 2001 From: Ryusuke Konishi Date: Thu, 16 Dec 2010 09:57:57 +0900 Subject: nilfs2: fix regression of garbage collection ioctl On 2.6.37-rc1, garbage collection ioctl of nilfs was broken due to the commit 263d90cefc7d82a0 ("nilfs2: remove own inode hash used for GC"), and leading to filesystem corruption. The patch doesn't queue gc-inodes for log writer if they are reused through the vfs inode cache. Here, gc-inode is the inode which buffers blocks to be relocated on GC. That patch queues gc-inodes in nilfs_init_gcinode() function, but this function is not called when they don't have I_NEW flag. Thus, some of live blocks are wrongly overrode without being moved to new logs. This resolves the problem by moving the gc-inode queueing to an outer function to ensure it's done right. Signed-off-by: Ryusuke Konishi diff --git a/fs/nilfs2/gcinode.c b/fs/nilfs2/gcinode.c index 33ad25d..caf9a6a 100644 --- a/fs/nilfs2/gcinode.c +++ b/fs/nilfs2/gcinode.c @@ -176,7 +176,6 @@ int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *bh) int nilfs_init_gcinode(struct inode *inode) { struct nilfs_inode_info *ii = NILFS_I(inode); - struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; inode->i_mode = S_IFREG; mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); @@ -186,14 +185,6 @@ int nilfs_init_gcinode(struct inode *inode) ii->i_flags = 0; nilfs_bmap_init_gc(ii->i_bmap); - /* - * Add the inode to GC inode list. Garbage Collection - * is serialized and no two processes manipulate the - * list simultaneously. - */ - igrab(inode); - list_add(&NILFS_I(inode)->i_dirty, &nilfs->ns_gc_inodes); - return 0; } diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c index e00d945..b185e93 100644 --- a/fs/nilfs2/ioctl.c +++ b/fs/nilfs2/ioctl.c @@ -337,6 +337,7 @@ static int nilfs_ioctl_move_blocks(struct super_block *sb, struct nilfs_argv *argv, void *buf) { size_t nmembs = argv->v_nmembs; + struct the_nilfs *nilfs = NILFS_SB(sb)->s_nilfs; struct inode *inode; struct nilfs_vdesc *vdesc; struct buffer_head *bh, *n; @@ -353,6 +354,17 @@ static int nilfs_ioctl_move_blocks(struct super_block *sb, ret = PTR_ERR(inode); goto failed; } + if (list_empty(&NILFS_I(inode)->i_dirty)) { + /* + * Add the inode to GC inode list. Garbage Collection + * is serialized and no two processes manipulate the + * list simultaneously. + */ + igrab(inode); + list_add(&NILFS_I(inode)->i_dirty, + &nilfs->ns_gc_inodes); + } + do { ret = nilfs_ioctl_move_inode_block(inode, vdesc, &buffers); -- cgit v0.10.2 From bb6f1d9a99f1947d91693de62ed54ac3bf1e2dfe Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 16 Dec 2010 17:03:13 -0600 Subject: lguest: fix crash lguest_time_init fe25c7fc2e "x86: lguest: Convert to new irq chip functions" converted enable_lguest_irq() to take a struct irq_data *, but didn't fix the one internal caller. Signed-off-by: Rusty Russell To: x86@kernel.org diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 73b1e1a..45e64b3 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -1002,7 +1002,7 @@ static void lguest_time_init(void) clockevents_register_device(&lguest_clockevent); /* Finally, we unblock the timer interrupt. */ - enable_lguest_irq(0); + clear_bit(0, lguest_data.blocked_interrupts); } /* -- cgit v0.10.2 From bb4093deb259ea9c92415796a6a139e35272f8a8 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 16 Dec 2010 17:03:15 -0600 Subject: lguest: restore boot speed lguest is dumb and drops *all* the pagetables for set_pte (which is only used for kernel mapping manipulation, so it's OK without highmem). But it's used a lot in boot, too. As a guest optimization, we suppressed this flushing until the first page switch. Now we have initial_page_table, that happens much earlier, so extend the heuristic to wait until we switch to something other than the swapper_pg_dir or initial_page_table. As measured on my laptop under kvm, this dropped the time-to-mount-root from 48 seconds to 4.3 seconds. Signed-off-by: Rusty Russell diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 45e64b3..24e4973 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -531,7 +531,10 @@ static void lguest_write_cr3(unsigned long cr3) { lguest_data.pgdir = cr3; lazy_hcall1(LHCALL_NEW_PGTABLE, cr3); - cr3_changed = true; + + /* These two page tables are simple, linear, and used during boot */ + if (cr3 != __pa(swapper_pg_dir) && cr3 != __pa(initial_page_table)) + cr3_changed = true; } static unsigned long lguest_read_cr3(void) @@ -703,9 +706,9 @@ static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval) * to forget all of them. Fortunately, this is very rare. * * ... except in early boot when the kernel sets up the initial pagetables, - * which makes booting astonishingly slow: 1.83 seconds! So we don't even tell - * the Host anything changed until we've done the first page table switch, - * which brings boot back to 0.25 seconds. + * which makes booting astonishingly slow: 48 seconds! So we don't even tell + * the Host anything changed until we've done the first real page table switch, + * which brings boot back to 4.3 seconds. */ static void lguest_set_pte(pte_t *ptep, pte_t pteval) { -- cgit v0.10.2 From da32dac101263fb5b155407507c548e3ac2a6a2a Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 16 Dec 2010 17:03:15 -0600 Subject: lguest: populate initial_page_table Two x86 patches broke lguest: 1) v2.6.35-492-g72d7c3b, which changed x86 to use the memblock allocator. In lguest, the host places linear page tables at the top of mem, which used to be enough to get us up to the swapper_pg_dir page tables. With the first patch, the direct mapping tables used that memory: Before: kernel direct mapping tables up to 4000000 @ 7000-1a000 After: kernel direct mapping tables up to 4000000 @ 3fed000-4000000 I initially fixed this by lying about the amount of memory we had, so the kernel wouldn't blatt the lguest boot pagetables (yuk!), but then... 2) v2.6.36-rc8-54-gb40827f, which made x86 boot use initial_page_table. This was initialized in a part of head_32.S which isn't executed by lguest; it is then copied into swapper_pg_dir. So we have to initialize it; and anyway we switch to it before we blatt the old tables, so that fixes the previous damage as well. For the moment, I cut & pasted the code into lguest's boot code, but next merge window I will merge them. Signed-off-by: Rusty Russell Cc: Jeremy Fitzhardinge Cc: Konrad Rzeszutek Wilk To: x86@kernel.org diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index bcece91..f0bea76 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -620,13 +620,13 @@ ENTRY(initial_code) __PAGE_ALIGNED_BSS .align PAGE_SIZE_asm #ifdef CONFIG_X86_PAE -initial_pg_pmd: +ENTRY(initial_pg_pmd) .fill 1024*KPMDS,4,0 #else ENTRY(initial_page_table) .fill 1024,4,0 #endif -initial_pg_fixmap: +ENTRY(initial_pg_fixmap) .fill 1024,4,0 ENTRY(empty_zero_page) .fill 4096,1,0 diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index 24e4973..4996cf5 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -1352,9 +1352,6 @@ __init void lguest_init(void) */ switch_to_new_gdt(0); - /* We actually boot with all memory mapped, but let's say 128MB. */ - max_pfn_mapped = (128*1024*1024) >> PAGE_SHIFT; - /* * The Host<->Guest Switcher lives at the top of our address space, and * the Host told us how big it is when we made LGUEST_INIT hypercall: diff --git a/arch/x86/lguest/i386_head.S b/arch/x86/lguest/i386_head.S index 4f420c2f..e7d5382 100644 --- a/arch/x86/lguest/i386_head.S +++ b/arch/x86/lguest/i386_head.S @@ -4,6 +4,7 @@ #include #include #include +#include /*G:020 * Our story starts with the kernel booting into startup_32 in @@ -37,9 +38,113 @@ ENTRY(lguest_entry) /* Set up the initial stack so we can run C code. */ movl $(init_thread_union+THREAD_SIZE),%esp + call init_pagetables + /* Jumps are relative: we're running __PAGE_OFFSET too low. */ jmp lguest_init+__PAGE_OFFSET +/* + * Initialize page tables. This creates a PDE and a set of page + * tables, which are located immediately beyond __brk_base. The variable + * _brk_end is set up to point to the first "safe" location. + * Mappings are created both at virtual address 0 (identity mapping) + * and PAGE_OFFSET for up to _end. + * + * FIXME: This code is taken verbatim from arch/x86/kernel/head_32.S: they + * don't have a stack at this point, so we can't just use call and ret. + */ +init_pagetables: +#if PTRS_PER_PMD > 1 +#define PAGE_TABLE_SIZE(pages) (((pages) / PTRS_PER_PMD) + PTRS_PER_PGD) +#else +#define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD) +#endif +#define pa(X) ((X) - __PAGE_OFFSET) + +/* Enough space to fit pagetables for the low memory linear map */ +MAPPING_BEYOND_END = \ + PAGE_TABLE_SIZE(((1<<32) - __PAGE_OFFSET) >> PAGE_SHIFT) << PAGE_SHIFT +#ifdef CONFIG_X86_PAE + + /* + * In PAE mode initial_page_table is statically defined to contain + * enough entries to cover the VMSPLIT option (that is the top 1, 2 or 3 + * entries). The identity mapping is handled by pointing two PGD entries + * to the first kernel PMD. + * + * Note the upper half of each PMD or PTE are always zero at this stage. + */ + +#define KPMDS (((-__PAGE_OFFSET) >> 30) & 3) /* Number of kernel PMDs */ + + xorl %ebx,%ebx /* %ebx is kept at zero */ + + movl $pa(__brk_base), %edi + movl $pa(initial_pg_pmd), %edx + movl $PTE_IDENT_ATTR, %eax +10: + leal PDE_IDENT_ATTR(%edi),%ecx /* Create PMD entry */ + movl %ecx,(%edx) /* Store PMD entry */ + /* Upper half already zero */ + addl $8,%edx + movl $512,%ecx +11: + stosl + xchgl %eax,%ebx + stosl + xchgl %eax,%ebx + addl $0x1000,%eax + loop 11b + + /* + * End condition: we must map up to the end + MAPPING_BEYOND_END. + */ + movl $pa(_end) + MAPPING_BEYOND_END + PTE_IDENT_ATTR, %ebp + cmpl %ebp,%eax + jb 10b +1: + addl $__PAGE_OFFSET, %edi + movl %edi, pa(_brk_end) + shrl $12, %eax + movl %eax, pa(max_pfn_mapped) + + /* Do early initialization of the fixmap area */ + movl $pa(initial_pg_fixmap)+PDE_IDENT_ATTR,%eax + movl %eax,pa(initial_pg_pmd+0x1000*KPMDS-8) +#else /* Not PAE */ + +page_pde_offset = (__PAGE_OFFSET >> 20); + + movl $pa(__brk_base), %edi + movl $pa(initial_page_table), %edx + movl $PTE_IDENT_ATTR, %eax +10: + leal PDE_IDENT_ATTR(%edi),%ecx /* Create PDE entry */ + movl %ecx,(%edx) /* Store identity PDE entry */ + movl %ecx,page_pde_offset(%edx) /* Store kernel PDE entry */ + addl $4,%edx + movl $1024, %ecx +11: + stosl + addl $0x1000,%eax + loop 11b + /* + * End condition: we must map up to the end + MAPPING_BEYOND_END. + */ + movl $pa(_end) + MAPPING_BEYOND_END + PTE_IDENT_ATTR, %ebp + cmpl %ebp,%eax + jb 10b + addl $__PAGE_OFFSET, %edi + movl %edi, pa(_brk_end) + shrl $12, %eax + movl %eax, pa(max_pfn_mapped) + + /* Do early initialization of the fixmap area */ + movl $pa(initial_pg_fixmap)+PDE_IDENT_ATTR,%eax + movl %eax,pa(initial_page_table+0xffc) +#endif + ret + /*G:055 * We create a macro which puts the assembler code between lgstart_ and lgend_ * markers. These templates are put in the .text section: they can't be -- cgit v0.10.2 From ce677831a4abd0f9f957c90ac6f6a0d0472bafb4 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Sun, 24 Oct 2010 21:50:42 +0200 Subject: perf: Fix off by one in perf_swevent_init() The perf_swevent_enabled[] array has PERF_COUNT_SW_MAX elements. Signed-off-by: Dan Carpenter Signed-off-by: Peter Zijlstra LKML-Reference: <20101024195041.GT5985@bicker> Signed-off-by: Ingo Molnar diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 7b87017..2870fee 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -4719,7 +4719,7 @@ static int perf_swevent_init(struct perf_event *event) break; } - if (event_id > PERF_COUNT_SW_MAX) + if (event_id >= PERF_COUNT_SW_MAX) return -ENOENT; if (!event->parent) { -- cgit v0.10.2 From fe44d62122829959e960bc699318d58966922a69 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 9 Dec 2010 14:15:34 +0100 Subject: sched: Fix the irqtime code to deal with u64 wraps Some ARM systems have a short sched_clock() [ which needs to be fixed too ], but this exposed a bug in the irq_time code as well, it doesn't deal with wraps at all. Fix the irq_time code to deal with u64 wraps by re-writing the code to only use delta increments, which avoids the whole issue. Reviewed-by: Venkatesh Pallipadi Reported-by: Mikael Pettersson Tested-by: Mikael Pettersson Signed-off-by: Peter Zijlstra LKML-Reference: <1292242433.6803.199.camel@twins> Signed-off-by: Ingo Molnar diff --git a/kernel/sched.c b/kernel/sched.c index da14302..79b557c 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -636,23 +636,18 @@ static inline struct task_group *task_group(struct task_struct *p) #endif /* CONFIG_CGROUP_SCHED */ -static u64 irq_time_cpu(int cpu); -static void sched_irq_time_avg_update(struct rq *rq, u64 irq_time); +static void update_rq_clock_task(struct rq *rq, s64 delta); -inline void update_rq_clock(struct rq *rq) +static void update_rq_clock(struct rq *rq) { - int cpu = cpu_of(rq); - u64 irq_time; + s64 delta; if (rq->skip_clock_update) return; - rq->clock = sched_clock_cpu(cpu); - irq_time = irq_time_cpu(cpu); - if (rq->clock - irq_time > rq->clock_task) - rq->clock_task = rq->clock - irq_time; - - sched_irq_time_avg_update(rq, irq_time); + delta = sched_clock_cpu(cpu_of(rq)) - rq->clock; + rq->clock += delta; + update_rq_clock_task(rq, delta); } /* @@ -1946,19 +1941,20 @@ void disable_sched_clock_irqtime(void) sched_clock_irqtime = 0; } -static u64 irq_time_cpu(int cpu) +static inline u64 irq_time_cpu(int cpu) { - if (!sched_clock_irqtime) - return 0; - return per_cpu(cpu_softirq_time, cpu) + per_cpu(cpu_hardirq_time, cpu); } +/* + * Called before incrementing preempt_count on {soft,}irq_enter + * and before decrementing preempt_count on {soft,}irq_exit. + */ void account_system_vtime(struct task_struct *curr) { unsigned long flags; + s64 delta; int cpu; - u64 now, delta; if (!sched_clock_irqtime) return; @@ -1966,9 +1962,9 @@ void account_system_vtime(struct task_struct *curr) local_irq_save(flags); cpu = smp_processor_id(); - now = sched_clock_cpu(cpu); - delta = now - per_cpu(irq_start_time, cpu); - per_cpu(irq_start_time, cpu) = now; + delta = sched_clock_cpu(cpu) - __this_cpu_read(irq_start_time); + __this_cpu_add(irq_start_time, delta); + /* * We do not account for softirq time from ksoftirqd here. * We want to continue accounting softirq time to ksoftirqd thread @@ -1976,33 +1972,54 @@ void account_system_vtime(struct task_struct *curr) * that do not consume any time, but still wants to run. */ if (hardirq_count()) - per_cpu(cpu_hardirq_time, cpu) += delta; + __this_cpu_add(cpu_hardirq_time, delta); else if (in_serving_softirq() && !(curr->flags & PF_KSOFTIRQD)) - per_cpu(cpu_softirq_time, cpu) += delta; + __this_cpu_add(cpu_softirq_time, delta); local_irq_restore(flags); } EXPORT_SYMBOL_GPL(account_system_vtime); -static void sched_irq_time_avg_update(struct rq *rq, u64 curr_irq_time) +static void update_rq_clock_task(struct rq *rq, s64 delta) { - if (sched_clock_irqtime && sched_feat(NONIRQ_POWER)) { - u64 delta_irq = curr_irq_time - rq->prev_irq_time; - rq->prev_irq_time = curr_irq_time; - sched_rt_avg_update(rq, delta_irq); - } + s64 irq_delta; + + irq_delta = irq_time_cpu(cpu_of(rq)) - rq->prev_irq_time; + + /* + * Since irq_time is only updated on {soft,}irq_exit, we might run into + * this case when a previous update_rq_clock() happened inside a + * {soft,}irq region. + * + * When this happens, we stop ->clock_task and only update the + * prev_irq_time stamp to account for the part that fit, so that a next + * update will consume the rest. This ensures ->clock_task is + * monotonic. + * + * It does however cause some slight miss-attribution of {soft,}irq + * time, a more accurate solution would be to update the irq_time using + * the current rq->clock timestamp, except that would require using + * atomic ops. + */ + if (irq_delta > delta) + irq_delta = delta; + + rq->prev_irq_time += irq_delta; + delta -= irq_delta; + rq->clock_task += delta; + + if (irq_delta && sched_feat(NONIRQ_POWER)) + sched_rt_avg_update(rq, irq_delta); } -#else +#else /* CONFIG_IRQ_TIME_ACCOUNTING */ -static u64 irq_time_cpu(int cpu) +static void update_rq_clock_task(struct rq *rq, s64 delta) { - return 0; + rq->clock_task += delta; } -static void sched_irq_time_avg_update(struct rq *rq, u64 curr_irq_time) { } - -#endif +#endif /* CONFIG_IRQ_TIME_ACCOUNTING */ #include "sched_idletask.c" #include "sched_fair.c" -- cgit v0.10.2 From 8e92c20183ed0579d94501311b81c42b65cb2129 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Thu, 9 Dec 2010 14:15:34 +0100 Subject: sched: Fix the irqtime code for 32bit Since the irqtime accounting is using non-atomic u64 and can be read from remote cpus (writes are strictly cpu local, reads are not) we have to deal with observing partial updates. When we do observe partial updates the clock movement (in particular, ->clock_task movement) will go funny (in either direction), a subsequent clock update (observing the full update) will make it go funny in the oposite direction. Since we rely on these clocks to be strictly monotonic we cannot suffer backwards motion. One possible solution would be to simply ignore all backwards deltas, but that will lead to accounting artefacts, most notable: clock_task + irq_time != clock, this inaccuracy would end up in user visible stats. Therefore serialize the reads using a seqcount. Reviewed-by: Venkatesh Pallipadi Reported-by: Mikael Pettersson Tested-by: Mikael Pettersson Signed-off-by: Peter Zijlstra LKML-Reference: <1292242434.6803.200.camel@twins> Signed-off-by: Ingo Molnar diff --git a/kernel/sched.c b/kernel/sched.c index 79b557c..456c990 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -1920,10 +1920,9 @@ static void deactivate_task(struct rq *rq, struct task_struct *p, int flags) * They are read and saved off onto struct rq in update_rq_clock(). * This may result in other CPU reading this CPU's irq time and can * race with irq/account_system_vtime on this CPU. We would either get old - * or new value (or semi updated value on 32 bit) with a side effect of - * accounting a slice of irq time to wrong task when irq is in progress - * while we read rq->clock. That is a worthy compromise in place of having - * locks on each irq in account_system_time. + * or new value with a side effect of accounting a slice of irq time to wrong + * task when irq is in progress while we read rq->clock. That is a worthy + * compromise in place of having locks on each irq in account_system_time. */ static DEFINE_PER_CPU(u64, cpu_hardirq_time); static DEFINE_PER_CPU(u64, cpu_softirq_time); @@ -1941,10 +1940,48 @@ void disable_sched_clock_irqtime(void) sched_clock_irqtime = 0; } -static inline u64 irq_time_cpu(int cpu) +#ifndef CONFIG_64BIT +static DEFINE_PER_CPU(seqcount_t, irq_time_seq); + +static inline void irq_time_write_begin(void) +{ + __this_cpu_inc(irq_time_seq.sequence); + smp_wmb(); +} + +static inline void irq_time_write_end(void) +{ + smp_wmb(); + __this_cpu_inc(irq_time_seq.sequence); +} + +static inline u64 irq_time_read(int cpu) +{ + u64 irq_time; + unsigned seq; + + do { + seq = read_seqcount_begin(&per_cpu(irq_time_seq, cpu)); + irq_time = per_cpu(cpu_softirq_time, cpu) + + per_cpu(cpu_hardirq_time, cpu); + } while (read_seqcount_retry(&per_cpu(irq_time_seq, cpu), seq)); + + return irq_time; +} +#else /* CONFIG_64BIT */ +static inline void irq_time_write_begin(void) +{ +} + +static inline void irq_time_write_end(void) +{ +} + +static inline u64 irq_time_read(int cpu) { return per_cpu(cpu_softirq_time, cpu) + per_cpu(cpu_hardirq_time, cpu); } +#endif /* CONFIG_64BIT */ /* * Called before incrementing preempt_count on {soft,}irq_enter @@ -1965,6 +2002,7 @@ void account_system_vtime(struct task_struct *curr) delta = sched_clock_cpu(cpu) - __this_cpu_read(irq_start_time); __this_cpu_add(irq_start_time, delta); + irq_time_write_begin(); /* * We do not account for softirq time from ksoftirqd here. * We want to continue accounting softirq time to ksoftirqd thread @@ -1976,6 +2014,7 @@ void account_system_vtime(struct task_struct *curr) else if (in_serving_softirq() && !(curr->flags & PF_KSOFTIRQD)) __this_cpu_add(cpu_softirq_time, delta); + irq_time_write_end(); local_irq_restore(flags); } EXPORT_SYMBOL_GPL(account_system_vtime); @@ -1984,7 +2023,7 @@ static void update_rq_clock_task(struct rq *rq, s64 delta) { s64 irq_delta; - irq_delta = irq_time_cpu(cpu_of(rq)) - rq->prev_irq_time; + irq_delta = irq_time_read(cpu_of(rq)) - rq->prev_irq_time; /* * Since irq_time is only updated on {soft,}irq_exit, we might run into -- cgit v0.10.2 From 3e26f23091da06d02fa62da14c95f3688d27857c Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Thu, 16 Dec 2010 12:16:34 +0200 Subject: KVM: Fix preemption counter leak in kvm_timer_init() Based on a patch from Thomas Meyer. Signed-off-by: Avi Kivity diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e3abd84..b989e1f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4564,9 +4564,11 @@ static void kvm_timer_init(void) #ifdef CONFIG_CPU_FREQ struct cpufreq_policy policy; memset(&policy, 0, sizeof(policy)); - cpufreq_get_policy(&policy, get_cpu()); + cpu = get_cpu(); + cpufreq_get_policy(&policy, cpu); if (policy.cpuinfo.max_freq) max_tsc_khz = policy.cpuinfo.max_freq; + put_cpu(); #endif cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, CPUFREQ_TRANSITION_NOTIFIER); -- cgit v0.10.2 From 1497dd1d29c6a53fcd3c80f7ac8d0e0239e7389e Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 10 Dec 2010 00:16:39 +0100 Subject: PM / Hibernate: Fix PM_POST_* notification with user-space suspend The user-space hibernation sends a wrong notification after the image restoration because of thinko for the file flag check. RDONLY corresponds to hibernation and WRONLY to restoration, confusingly. Signed-off-by: Takashi Iwai Signed-off-by: Rafael J. Wysocki Cc: stable@kernel.org diff --git a/kernel/power/user.c b/kernel/power/user.c index 1b2ea31..c36c3b9 100644 --- a/kernel/power/user.c +++ b/kernel/power/user.c @@ -137,7 +137,7 @@ static int snapshot_release(struct inode *inode, struct file *filp) free_all_swap_pages(data->swap); if (data->frozen) thaw_processes(); - pm_notifier_call_chain(data->mode == O_WRONLY ? + pm_notifier_call_chain(data->mode == O_RDONLY ? PM_POST_HIBERNATION : PM_POST_RESTORE); atomic_inc(&snapshot_device_available); -- cgit v0.10.2 From be8cd644c49dca4212e975455c8e7119b848ebe8 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sat, 11 Dec 2010 21:46:44 +0100 Subject: PM / Hibernate: Restore old swap signature to avoid user space breakage Commit 3624eb0 (PM / Hibernate: Modify signature used to mark swap) attempted to modify hibernate signature used to mark swap partitions containing hibernation images, so that old kernels don't try to handle compressed images. However, this change broke resume from hibernation on Fedora 14 that apparently doesn't pass the resume= argument to the kernel and tries to trigger resume from early user space. This doesn't work, because the signature is now different, so the old signature has to be restored to avoid the problem. Addresses https://bugzilla.kernel.org/show_bug.cgi?id=22732 . Reported-by: Dr. David Alan Gilbert Reported-by: Zhang Rui Reported-by: Pascal Chapperon Signed-off-by: Rafael J. Wysocki diff --git a/kernel/power/swap.c b/kernel/power/swap.c index baf667b..8c7e483 100644 --- a/kernel/power/swap.c +++ b/kernel/power/swap.c @@ -30,7 +30,7 @@ #include "power.h" -#define HIBERNATE_SIG "LINHIB0001" +#define HIBERNATE_SIG "S1SUSPEND" /* * The swap map is a data structure used for keeping track of each page -- cgit v0.10.2 From f08f5a0add20834d3f3d876dfe08005a5df656db Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Thu, 16 Dec 2010 17:11:58 +0100 Subject: PM / Runtime: Fix pm_runtime_suspended() There are some situations (e.g. in __pm_generic_call()), where pm_runtime_suspended() is used to decide whether or not to execute a device's (system) ->suspend() callback. The callback is not executed if pm_runtime_suspended() returns true, but it does so for devices that don't even support runtime PM, because the power.disable_depth device field is ignored by it. This leads to problems (i.e. devices are not suspened when they should), so rework pm_runtime_suspended() so that it returns false if the device's power.disable_depth field is different from zero. Signed-off-by: Rafael J. Wysocki Cc: stable@kernel.org diff --git a/Documentation/power/runtime_pm.txt b/Documentation/power/runtime_pm.txt index 489e9ba..41cc7b3 100644 --- a/Documentation/power/runtime_pm.txt +++ b/Documentation/power/runtime_pm.txt @@ -379,8 +379,8 @@ drivers/base/power/runtime.c and include/linux/pm_runtime.h: zero) bool pm_runtime_suspended(struct device *dev); - - return true if the device's runtime PM status is 'suspended', or false - otherwise + - return true if the device's runtime PM status is 'suspended' and its + 'power.disable_depth' field is equal to zero, or false otherwise void pm_runtime_allow(struct device *dev); - set the power.runtime_auto flag for the device and decrease its usage diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index 3ec2358..d19f1cc 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -77,7 +77,8 @@ static inline void device_set_run_wake(struct device *dev, bool enable) static inline bool pm_runtime_suspended(struct device *dev) { - return dev->power.runtime_status == RPM_SUSPENDED; + return dev->power.runtime_status == RPM_SUSPENDED + && !dev->power.disable_depth; } static inline void pm_runtime_mark_last_busy(struct device *dev) -- cgit v0.10.2 From 2b3e50234eafc40a04f5f4a2b7bb24b506fd7e87 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 2 Nov 2010 19:38:53 +0000 Subject: MIPS: Swarm: Fix typo in symbol name: RTC_M4LT81 -> RTC_M41T81 Signed-off-by: Ralf Baechle diff --git a/arch/mips/sibyte/swarm/setup.c b/arch/mips/sibyte/swarm/setup.c index c308989..41707a2 100644 --- a/arch/mips/sibyte/swarm/setup.c +++ b/arch/mips/sibyte/swarm/setup.c @@ -82,7 +82,7 @@ int swarm_be_handler(struct pt_regs *regs, int is_fixup) enum swarm_rtc_type { RTC_NONE, RTC_XICOR, - RTC_M4LT81 + RTC_M41T81, }; enum swarm_rtc_type swarm_rtc_type; @@ -96,7 +96,7 @@ void read_persistent_clock(struct timespec *ts) sec = xicor_get_time(); break; - case RTC_M4LT81: + case RTC_M41T81: sec = m41t81_get_time(); break; @@ -115,7 +115,7 @@ int rtc_mips_set_time(unsigned long sec) case RTC_XICOR: return xicor_set_time(sec); - case RTC_M4LT81: + case RTC_M41T81: return m41t81_set_time(sec); case RTC_NONE: @@ -141,7 +141,7 @@ void __init plat_mem_setup(void) if (xicor_probe()) swarm_rtc_type = RTC_XICOR; if (m41t81_probe()) - swarm_rtc_type = RTC_M4LT81; + swarm_rtc_type = RTC_M41T81; #ifdef CONFIG_VT screen_info = (struct screen_info) { -- cgit v0.10.2 From a989ff898f9740651d00388c33bdf4f2a7914920 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 4 Nov 2010 11:13:59 +0000 Subject: MIPS: Don't stomp on caller's ->regs[2] in copy_thread() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We never needed that (->regs[2] is overwritten on return from syscall paths with return value of syscall, so storing it there early made no sense) and with new restart logics since d27240bf7e61d2656de18e158ec910a902030847 it has become really bad - we lose the original syscall number before the place where we decide that we might need a syscall restart. Note that for child we do need the assignment to regs[2] - it won't go through the normal return from syscall path. [Ralf: Issue found and reported by Lluís; initial investigations by me; bug finally found and patch by Al; testing by me and Lluís.] Signed-off-by: Al Viro Tested-by: Lluís Batlle i Rossell Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index 9996094..ae167df 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -142,7 +142,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, childregs->regs[7] = 0; /* Clear error flag */ childregs->regs[2] = 0; /* Child gets zero as return value */ - regs->regs[2] = p->pid; if (childregs->cp0_status & ST0_CU0) { childregs->regs[28] = (unsigned long) ti; -- cgit v0.10.2 From fe749aab1d21cbb4d87527a7df8799583c233496 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 4 Nov 2010 23:25:56 +0100 Subject: MIPS: jz4740: qi_lb60: Fix gpio for the 6th row of the keyboard matrix This patch fixes the gpio number for the 6th row of the keyboard matrix. (And fixes a typo in my name...) Signed-off-by: Lars-Peter Clausen Cc: linux-mips@linux-mips.org Cc: stable@kernel.org Signed-off-by: https://patchwork.linux-mips.org/patch/1754/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/jz4740/board-qi_lb60.c b/arch/mips/jz4740/board-qi_lb60.c index 5742bb4..5c0a357 100644 --- a/arch/mips/jz4740/board-qi_lb60.c +++ b/arch/mips/jz4740/board-qi_lb60.c @@ -5,7 +5,7 @@ * * Copyright (c) 2009 Qi Hardware inc., * Author: Xiangfu Liu - * Copyright 2010, Lars-Petrer Clausen + * Copyright 2010, Lars-Peter Clausen * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 or later @@ -235,7 +235,7 @@ static const unsigned int qi_lb60_keypad_rows[] = { QI_LB60_GPIO_KEYIN(3), QI_LB60_GPIO_KEYIN(4), QI_LB60_GPIO_KEYIN(5), - QI_LB60_GPIO_KEYIN(7), + QI_LB60_GPIO_KEYIN(6), QI_LB60_GPIO_KEYIN8, }; -- cgit v0.10.2 From 1d210386f6ef9000b1cd723cf453c5eb0377e722 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 4 Nov 2010 23:25:57 +0100 Subject: MIPS: jz4740: Fix section mismatch in prom.c This patch fixes the following section mismatch: WARNING: arch/mips/built-in.o(.text+0xc): Section mismatch in reference from the function jz4740_init_cmdline() to the variable .init.data:arcs_cmdline While were at it, make jz4740_init_cmdline static as well. Signed-off-by: Lars-Peter Clausen Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1755/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/jz4740/prom.c b/arch/mips/jz4740/prom.c index cfeac15..4a70407 100644 --- a/arch/mips/jz4740/prom.c +++ b/arch/mips/jz4740/prom.c @@ -23,7 +23,7 @@ #include #include -void jz4740_init_cmdline(int argc, char *argv[]) +static __init void jz4740_init_cmdline(int argc, char *argv[]) { unsigned int count = COMMAND_LINE_SIZE - 1; int i; -- cgit v0.10.2 From 1c0d52b9b5e6ca277c13d6fece9c34ed3159423d Mon Sep 17 00:00:00 2001 From: David Daney Date: Mon, 1 Nov 2010 17:43:07 -0700 Subject: MIPS: Don't clobber personality high bits. The high bits of current->personality carry settings that we don't want to clobber on each exec. Only clobber them if the lower bits that indicate either PER_LINUX or PER_LINUX32 are invalid. The clobbering prevents us from using useful bits like ADDR_NO_RANDOMIZE. Reported-by: Camm Maguire Signed-off-by: David Daney Cc: Camm Maguire Patchwork: https://patchwork.linux-mips.org/patch/1750/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h index fd1d39e..455c0ac 100644 --- a/arch/mips/include/asm/elf.h +++ b/arch/mips/include/asm/elf.h @@ -249,7 +249,8 @@ extern struct mips_abi mips_abi_n32; #define SET_PERSONALITY(ex) \ do { \ - set_personality(PER_LINUX); \ + if (personality(current->personality) != PER_LINUX) \ + set_personality(PER_LINUX); \ \ current->thread.abi = &mips_abi; \ } while (0) @@ -296,6 +297,8 @@ do { \ #define SET_PERSONALITY(ex) \ do { \ + unsigned int p; \ + \ clear_thread_flag(TIF_32BIT_REGS); \ clear_thread_flag(TIF_32BIT_ADDR); \ \ @@ -304,7 +307,8 @@ do { \ else \ current->thread.abi = &mips_abi; \ \ - if (current->personality != PER_LINUX32) \ + p = personality(current->personality); \ + if (p != PER_LINUX32 && p != PER_LINUX) \ set_personality(PER_LINUX); \ } while (0) -- cgit v0.10.2 From d62c9ced7ca783e64ff4d9d3d1340cfe2284d47b Mon Sep 17 00:00:00 2001 From: David Daney Date: Mon, 1 Nov 2010 17:43:08 -0700 Subject: MIPS: compat: Don't clobber personality bits in 32-bit sys_personality(). If PER_LINUX32 has been set on a 32-bit kernel, only twiddle with the low-order personality bits, let the upper bits pass through. Signed-off-by: David Daney To: linux-mips@linux-mips.org Cc: Camm Maguire Patchwork: https://patchwork.linux-mips.org/patch/1751/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index 6343b4a..876a75c 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -251,14 +251,15 @@ SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, SYSCALL_DEFINE1(32_personality, unsigned long, personality) { + unsigned int p = personality & 0xffffffff; int ret; - personality &= 0xffffffff; + if (personality(current->personality) == PER_LINUX32 && - personality == PER_LINUX) - personality = PER_LINUX32; - ret = sys_personality(personality); - if (ret == PER_LINUX32) - ret = PER_LINUX; + personality(p) == PER_LINUX) + p = (p & ~PER_MASK) | PER_LINUX32; + ret = sys_personality(p); + if (ret != -1 && personality(ret) == PER_LINUX32) + ret = (ret & ~PER_MASK) | PER_LINUX; return ret; } -- cgit v0.10.2 From 863abad4f644b6c12bc8176206b35fa7e7cfe1a9 Mon Sep 17 00:00:00 2001 From: Jesper Juhl Date: Sat, 30 Oct 2010 18:37:16 +0200 Subject: MIPS: VPE loader: Check vmalloc return value in vpe_open The return value of the vmalloc() call in arch/mips/kernel/vpe.c::vpe_open() is not checked, so we potentially store a null pointer in v->pbuffer. Add a check for a null return and then return -ENOMEM in that case. [Ralf: The check added by Jesper's original patch is where it logically should be. Adding it eleminated the need for the checks in a few other places, so I removed them. There still is a zillion of other things that need to be fixed in this file / API.] Signed-off-by: Jesper Juhl Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1747/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c index 3eb3cde..6a1fdfe 100644 --- a/arch/mips/kernel/vpe.c +++ b/arch/mips/kernel/vpe.c @@ -1092,6 +1092,10 @@ static int vpe_open(struct inode *inode, struct file *filp) /* this of-course trashes what was there before... */ v->pbuffer = vmalloc(P_SIZE); + if (!v->pbuffer) { + pr_warning("VPE loader: unable to allocate memory\n"); + return -ENOMEM; + } v->plen = P_SIZE; v->load_addr = NULL; v->len = 0; @@ -1149,10 +1153,9 @@ static int vpe_release(struct inode *inode, struct file *filp) if (ret < 0) v->shared_ptr = NULL; - // cleanup any temp buffers - if (v->pbuffer) - vfree(v->pbuffer); + vfree(v->pbuffer); v->plen = 0; + return ret; } @@ -1169,11 +1172,6 @@ static ssize_t vpe_write(struct file *file, const char __user * buffer, if (v == NULL) return -ENODEV; - if (v->pbuffer == NULL) { - printk(KERN_ERR "VPE loader: no buffer for program\n"); - return -ENOMEM; - } - if ((count + v->len) > v->plen) { printk(KERN_WARNING "VPE loader: elf size too big. Perhaps strip uneeded symbols\n"); -- cgit v0.10.2 From ec79812580e360081b58c3e2e8b5b69b8080b5a0 Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Mon, 8 Nov 2010 21:25:24 +0800 Subject: MIPS: Loongson: Add return value check for strict_strtoul() cc1: warnings being treated as errors arch/mips/loongson/common/env.c: In function 'prom_init_env': arch/mips/loongson/common/env.c:49: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result arch/mips/loongson/common/env.c:50: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result arch/mips/loongson/common/env.c:51: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result arch/mips/loongson/common/env.c:52: error: ignoring return value of 'strict_strtol', declared with attribute warn_unused_result Signed-off-by: Wu Zhangjin Cc: linux-mips Patchwork: https://patchwork.linux-mips.org/patch/1762/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c index ae4cff9..11b193f 100644 --- a/arch/mips/loongson/common/env.c +++ b/arch/mips/loongson/common/env.c @@ -29,9 +29,9 @@ unsigned long memsize, highmemsize; #define parse_even_earlier(res, option, p) \ do { \ + int ret; \ if (strncmp(option, (char *)p, strlen(option)) == 0) \ - strict_strtol((char *)p + strlen(option"="), \ - 10, &res); \ + ret = strict_strtol((char *)p + strlen(option"="), 10, &res); \ } while (0) void __init prom_init_env(void) -- cgit v0.10.2 From 690ca2ce0c824e8d3da7b2e273c2c873ab96d1e6 Mon Sep 17 00:00:00 2001 From: Yoichi Yuasa Date: Mon, 8 Nov 2010 17:23:52 +0900 Subject: MIPS: Alchemy: Add return value check for strict_strtoul() arch/mips/alchemy/devboards/prom.c: In function 'prom_init': arch/mips/alchemy/devboards/prom.c:60: error: ignoring return value of 'strict_strtoul', declared with attribute warn_unused_result Signed-off-by: Yoichi Yuasa Cc: linux-mips Patchwork: https://patchwork.linux-mips.org/patch/1761/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/alchemy/devboards/prom.c b/arch/mips/alchemy/devboards/prom.c index b30df5c..baeb213 100644 --- a/arch/mips/alchemy/devboards/prom.c +++ b/arch/mips/alchemy/devboards/prom.c @@ -54,10 +54,9 @@ void __init prom_init(void) prom_init_cmdline(); memsize_str = prom_getenv("memsize"); - if (!memsize_str) + if (!memsize_str || strict_strtoul(memsize_str, 0, &memsize)) memsize = ALCHEMY_BOARD_DEFAULT_MEMSIZE; - else - strict_strtoul(memsize_str, 0, &memsize); + add_memory_region(0, memsize, BOOT_MEM_RAM); } -- cgit v0.10.2 From 3bd27e329ca80f4946efdd12bf1f5a9bf0886e76 Mon Sep 17 00:00:00 2001 From: David Daney Date: Fri, 5 Nov 2010 15:12:48 -0700 Subject: MIPS: Rework GENERIC_HARDIRQS Kconfig. Recent changes to CONFIG_GENERIC_HARDIRQS have caused us to start getting: warning: (SMP && SYS_SUPPORTS_SMP) selects IRQ_PER_CPU which has unmet direct dependencies (HAVE_GENERIC_HARDIRQS) Rearranging our Kconfig quiets the message. Signed-off-by: David Daney To: linux-mips@linux-mips.org Cc: Thomas Gleixner Patchwork: https://patchwork.linux-mips.org/patch/1757/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 67a2fa2..7fc6bd1 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -19,6 +19,8 @@ config MIPS select GENERIC_ATOMIC64 if !64BIT select HAVE_DMA_ATTRS select HAVE_DMA_API_DEBUG + select HAVE_GENERIC_HARDIRQS + select GENERIC_IRQ_PROBE menu "Machine selection" @@ -1922,20 +1924,6 @@ config CPU_R4400_WORKAROUNDS bool # -# Use the generic interrupt handling code in kernel/irq/: -# -config GENERIC_HARDIRQS - bool - default y - -config GENERIC_IRQ_PROBE - bool - default y - -config IRQ_PER_CPU - bool - -# # - Highmem only makes sense for the 32-bit kernel. # - The current highmem code will only work properly on physically indexed # caches such as R3000, SB1, R7000 or those that look like they're virtually -- cgit v0.10.2 From ff42d62047e45075c54a5543bd4f110dfd032d11 Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sun, 31 Oct 2010 23:49:57 +0100 Subject: MIPS: AR7: Fix double ar7_gpio_init declaration Signed-off-by: Florian Fainelli To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1748/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/include/asm/mach-ar7/ar7.h b/arch/mips/include/asm/mach-ar7/ar7.h index 7919d76..31c7ff5 100644 --- a/arch/mips/include/asm/mach-ar7/ar7.h +++ b/arch/mips/include/asm/mach-ar7/ar7.h @@ -202,6 +202,4 @@ static inline void ar7_device_off(u32 bit) int __init ar7_gpio_init(void); -int __init ar7_gpio_init(void); - #endif /* __AR7_H__ */ -- cgit v0.10.2 From 0bc6791707694c77b3543de39f77972a65de917a Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Sun, 31 Oct 2010 23:49:58 +0100 Subject: MIPS: AR7: Fix loops per jiffies on TNETD7200 devices TNETD7200 run their CPU clock faster than the default CPU clock we assume. In order to have the correct loops per jiffies settings, initialize clocks right before setting mips_hpt_frequency. As a side effect, we can no longer use msleep in clocks.c which requires other parts of the kernel to be initialized, so replace these with mdelay. Signed-off-by: Florian Fainelli To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1749/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/ar7/clock.c b/arch/mips/ar7/clock.c index fc0e715..2ca4ada 100644 --- a/arch/mips/ar7/clock.c +++ b/arch/mips/ar7/clock.c @@ -239,12 +239,12 @@ static void tnetd7300_set_clock(u32 shift, struct tnetd7300_clock *clock, calculate(base_clock, frequency, &prediv, &postdiv, &mul); writel(((prediv - 1) << PREDIV_SHIFT) | (postdiv - 1), &clock->ctrl); - msleep(1); + mdelay(1); writel(4, &clock->pll); while (readl(&clock->pll) & PLL_STATUS) ; writel(((mul - 1) << MUL_SHIFT) | (0xff << 3) | 0x0e, &clock->pll); - msleep(75); + mdelay(75); } static void __init tnetd7300_init_clocks(void) @@ -456,7 +456,7 @@ void clk_put(struct clk *clk) } EXPORT_SYMBOL(clk_put); -int __init ar7_init_clocks(void) +void __init ar7_init_clocks(void) { switch (ar7_chip_id()) { case AR7_CHIP_7100: @@ -472,7 +472,4 @@ int __init ar7_init_clocks(void) } /* adjust vbus clock rate */ vbus_clk.rate = bus_clk.rate / 2; - - return 0; } -arch_initcall(ar7_init_clocks); diff --git a/arch/mips/ar7/time.c b/arch/mips/ar7/time.c index 5fb8a01..22c9321 100644 --- a/arch/mips/ar7/time.c +++ b/arch/mips/ar7/time.c @@ -30,6 +30,9 @@ void __init plat_time_init(void) { struct clk *cpu_clk; + /* Initialize ar7 clocks so the CPU clock frequency is correct */ + ar7_init_clocks(); + cpu_clk = clk_get(NULL, "cpu"); if (IS_ERR(cpu_clk)) { printk(KERN_ERR "unable to get cpu clock\n"); diff --git a/arch/mips/include/asm/mach-ar7/ar7.h b/arch/mips/include/asm/mach-ar7/ar7.h index 31c7ff5..07d3fad 100644 --- a/arch/mips/include/asm/mach-ar7/ar7.h +++ b/arch/mips/include/asm/mach-ar7/ar7.h @@ -201,5 +201,6 @@ static inline void ar7_device_off(u32 bit) } int __init ar7_gpio_init(void); +void __init ar7_init_clocks(void); #endif /* __AR7_H__ */ -- cgit v0.10.2 From 515b029d005b5694cf612a0a5ca6f861a7e45362 Mon Sep 17 00:00:00 2001 From: David Daney Date: Thu, 21 Oct 2010 16:32:26 -0700 Subject: MIPS: Send proper signal and siginfo on FP emulator faults. We were unconditionally sending SIGBUS with an empty siginfo on FP emulator faults. This differs from what happens when real floating point hardware would get a fault. For most faults we need to send SIGSEGV with the faulting address filled in in the struct siginfo. Reported-by: Camm Maguire Signed-off-by: David Daney To: linux-mips@linux-mips.org Cc: Camm Maguire Patchwork: https://patchwork.linux-mips.org/patch/1727/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 8e9fbe7..e971043 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -83,7 +83,8 @@ extern asmlinkage void handle_mcheck(void); extern asmlinkage void handle_reserved(void); extern int fpu_emulator_cop1Handler(struct pt_regs *xcp, - struct mips_fpu_struct *ctx, int has_fpu); + struct mips_fpu_struct *ctx, int has_fpu, + void *__user *fault_addr); void (*board_be_init)(void); int (*board_be_handler)(struct pt_regs *regs, int is_fixup); @@ -661,12 +662,36 @@ asmlinkage void do_ov(struct pt_regs *regs) force_sig_info(SIGFPE, &info, current); } +static int process_fpemu_return(int sig, void __user *fault_addr) +{ + if (sig == SIGSEGV || sig == SIGBUS) { + struct siginfo si = {0}; + si.si_addr = fault_addr; + si.si_signo = sig; + if (sig == SIGSEGV) { + if (find_vma(current->mm, (unsigned long)fault_addr)) + si.si_code = SEGV_ACCERR; + else + si.si_code = SEGV_MAPERR; + } else { + si.si_code = BUS_ADRERR; + } + force_sig_info(sig, &si, current); + return 1; + } else if (sig) { + force_sig(sig, current); + return 1; + } else { + return 0; + } +} + /* * XXX Delayed fp exceptions when doing a lazy ctx switch XXX */ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) { - siginfo_t info; + siginfo_t info = {0}; if (notify_die(DIE_FP, "FP exception", regs, 0, regs_to_trapnr(regs), SIGFPE) == NOTIFY_STOP) @@ -675,6 +700,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) if (fcr31 & FPU_CSR_UNI_X) { int sig; + void __user *fault_addr = NULL; /* * Unimplemented operation exception. If we've got the full @@ -690,7 +716,8 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) lose_fpu(1); /* Run the emulator */ - sig = fpu_emulator_cop1Handler(regs, ¤t->thread.fpu, 1); + sig = fpu_emulator_cop1Handler(regs, ¤t->thread.fpu, 1, + &fault_addr); /* * We can't allow the emulated instruction to leave any of @@ -702,8 +729,7 @@ asmlinkage void do_fpe(struct pt_regs *regs, unsigned long fcr31) own_fpu(1); /* Using the FPU again. */ /* If something went wrong, signal */ - if (sig) - force_sig(sig, current); + process_fpemu_return(sig, fault_addr); return; } else if (fcr31 & FPU_CSR_INV_X) @@ -996,11 +1022,11 @@ asmlinkage void do_cpu(struct pt_regs *regs) if (!raw_cpu_has_fpu) { int sig; + void __user *fault_addr = NULL; sig = fpu_emulator_cop1Handler(regs, - ¤t->thread.fpu, 0); - if (sig) - force_sig(sig, current); - else + ¤t->thread.fpu, + 0, &fault_addr); + if (!process_fpemu_return(sig, fault_addr)) mt_ase_fp_affinity(); } diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index b2ad1b0..d32cb05 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -64,7 +64,7 @@ static int fpu_emu(struct pt_regs *, struct mips_fpu_struct *, #if __mips >= 4 && __mips != 32 static int fpux_emu(struct pt_regs *, - struct mips_fpu_struct *, mips_instruction); + struct mips_fpu_struct *, mips_instruction, void *__user *); #endif /* Further private data for which no space exists in mips_fpu_struct */ @@ -208,16 +208,23 @@ static inline int cop1_64bit(struct pt_regs *xcp) * Two instructions if the instruction is in a branch delay slot. */ -static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) +static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx, + void *__user *fault_addr) { mips_instruction ir; unsigned long emulpc, contpc; unsigned int cond; - if (get_user(ir, (mips_instruction __user *) xcp->cp0_epc)) { + if (!access_ok(VERIFY_READ, xcp->cp0_epc, sizeof(mips_instruction))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; return SIGBUS; } + if (__get_user(ir, (mips_instruction __user *) xcp->cp0_epc)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; + return SIGSEGV; + } /* XXX NEC Vr54xx bug workaround */ if ((xcp->cp0_cause & CAUSEF_BD) && !isBranchInstr(&ir)) @@ -245,10 +252,16 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) #endif return SIGILL; } - if (get_user(ir, (mips_instruction __user *) emulpc)) { + if (!access_ok(VERIFY_READ, emulpc, sizeof(mips_instruction))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)emulpc; return SIGBUS; } + if (__get_user(ir, (mips_instruction __user *) emulpc)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)emulpc; + return SIGSEGV; + } /* __compute_return_epc() will have updated cp0_epc */ contpc = xcp->cp0_epc; /* In order not to confuse ptrace() et al, tweak context */ @@ -269,10 +282,17 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) u64 val; MIPS_FPU_EMU_INC_STATS(loads); - if (get_user(val, va)) { + + if (!access_ok(VERIFY_READ, va, sizeof(u64))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__get_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } DITOREG(val, MIPSInst_RT(ir)); break; } @@ -284,10 +304,16 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) MIPS_FPU_EMU_INC_STATS(stores); DIFROMREG(val, MIPSInst_RT(ir)); - if (put_user(val, va)) { + if (!access_ok(VERIFY_WRITE, va, sizeof(u64))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__put_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } break; } @@ -297,10 +323,16 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) u32 val; MIPS_FPU_EMU_INC_STATS(loads); - if (get_user(val, va)) { + if (!access_ok(VERIFY_READ, va, sizeof(u32))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__get_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } SITOREG(val, MIPSInst_RT(ir)); break; } @@ -312,10 +344,16 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) MIPS_FPU_EMU_INC_STATS(stores); SIFROMREG(val, MIPSInst_RT(ir)); - if (put_user(val, va)) { + if (!access_ok(VERIFY_WRITE, va, sizeof(u32))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__put_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } break; } @@ -440,11 +478,18 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) contpc = (xcp->cp0_epc + (MIPSInst_SIMM(ir) << 2)); - if (get_user(ir, - (mips_instruction __user *) xcp->cp0_epc)) { + if (!access_ok(VERIFY_READ, xcp->cp0_epc, + sizeof(mips_instruction))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; return SIGBUS; } + if (__get_user(ir, + (mips_instruction __user *) xcp->cp0_epc)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; + return SIGSEGV; + } switch (MIPSInst_OPCODE(ir)) { case lwc1_op: @@ -506,9 +551,8 @@ static int cop1Emulate(struct pt_regs *xcp, struct mips_fpu_struct *ctx) #if __mips >= 4 && __mips != 32 case cop1x_op:{ - int sig; - - if ((sig = fpux_emu(xcp, ctx, ir))) + int sig = fpux_emu(xcp, ctx, ir, fault_addr); + if (sig) return sig; break; } @@ -604,7 +648,7 @@ DEF3OP(nmadd, dp, ieee754dp_mul, ieee754dp_add, ieee754dp_neg); DEF3OP(nmsub, dp, ieee754dp_mul, ieee754dp_sub, ieee754dp_neg); static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, - mips_instruction ir) + mips_instruction ir, void *__user *fault_addr) { unsigned rcsr = 0; /* resulting csr */ @@ -624,10 +668,16 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, xcp->regs[MIPSInst_FT(ir)]); MIPS_FPU_EMU_INC_STATS(loads); - if (get_user(val, va)) { + if (!access_ok(VERIFY_READ, va, sizeof(u32))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__get_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } SITOREG(val, MIPSInst_FD(ir)); break; @@ -638,10 +688,16 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, MIPS_FPU_EMU_INC_STATS(stores); SIFROMREG(val, MIPSInst_FS(ir)); - if (put_user(val, va)) { + if (!access_ok(VERIFY_WRITE, va, sizeof(u32))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (put_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } break; case madd_s_op: @@ -701,10 +757,16 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, xcp->regs[MIPSInst_FT(ir)]); MIPS_FPU_EMU_INC_STATS(loads); - if (get_user(val, va)) { + if (!access_ok(VERIFY_READ, va, sizeof(u64))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__get_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } DITOREG(val, MIPSInst_FD(ir)); break; @@ -714,10 +776,16 @@ static int fpux_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, MIPS_FPU_EMU_INC_STATS(stores); DIFROMREG(val, MIPSInst_FS(ir)); - if (put_user(val, va)) { + if (!access_ok(VERIFY_WRITE, va, sizeof(u64))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; return SIGBUS; } + if (__put_user(val, va)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = va; + return SIGSEGV; + } break; case madd_d_op: @@ -1242,7 +1310,7 @@ static int fpu_emu(struct pt_regs *xcp, struct mips_fpu_struct *ctx, } int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx, - int has_fpu) + int has_fpu, void *__user *fault_addr) { unsigned long oldepc, prevepc; mips_instruction insn; @@ -1252,10 +1320,16 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx, do { prevepc = xcp->cp0_epc; - if (get_user(insn, (mips_instruction __user *) xcp->cp0_epc)) { + if (!access_ok(VERIFY_READ, xcp->cp0_epc, sizeof(mips_instruction))) { MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; return SIGBUS; } + if (__get_user(insn, (mips_instruction __user *) xcp->cp0_epc)) { + MIPS_FPU_EMU_INC_STATS(errors); + *fault_addr = (mips_instruction __user *)xcp->cp0_epc; + return SIGSEGV; + } if (insn == 0) xcp->cp0_epc += 4; /* skip nops */ else { @@ -1267,7 +1341,7 @@ int fpu_emulator_cop1Handler(struct pt_regs *xcp, struct mips_fpu_struct *ctx, */ /* convert to ieee library modes */ ieee754_csr.rm = ieee_rm[ieee754_csr.rm]; - sig = cop1Emulate(xcp, ctx); + sig = cop1Emulate(xcp, ctx, fault_addr); /* revert to mips rounding mode */ ieee754_csr.rm = mips_rm[ieee754_csr.rm]; } -- cgit v0.10.2 From e5674ad6ca9f1020c2bcc009a55becba3c30d8a3 Mon Sep 17 00:00:00 2001 From: Tony Wu Date: Wed, 10 Nov 2010 21:48:15 +0800 Subject: MIPS: Separate two consecutive loads in memset.S partial_fixup is used in noreorder block. Separating two consecutive loads can save one cycle on processors with GPR intrelock and can fix load-use on processors that need a load delay slot. Also do so for fwd_fixup. [Ralf: Only R2000/R3000 class processors are lacking the the load-user interlock and even some of those got it retrofitted. With R2000/R3000 being fairly uncommon these days the impact of this bug should be minor.] Signed-off-by: Tony Wu To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1768/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/lib/memset.S b/arch/mips/lib/memset.S index 77dc3b2..606c8a9 100644 --- a/arch/mips/lib/memset.S +++ b/arch/mips/lib/memset.S @@ -161,16 +161,16 @@ FEXPORT(__bzero) .Lfwd_fixup: PTR_L t0, TI_TASK($28) - LONG_L t0, THREAD_BUADDR(t0) andi a2, 0x3f + LONG_L t0, THREAD_BUADDR(t0) LONG_ADDU a2, t1 jr ra LONG_SUBU a2, t0 .Lpartial_fixup: PTR_L t0, TI_TASK($28) - LONG_L t0, THREAD_BUADDR(t0) andi a2, LONGMASK + LONG_L t0, THREAD_BUADDR(t0) LONG_ADDU a2, t1 jr ra LONG_SUBU a2, t0 -- cgit v0.10.2 From 4afdea81821880d0fc35e6c7ff54eeed9ec0614d Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Thu, 11 Nov 2010 19:08:52 +0100 Subject: MIPS: JZ4740: Fix pcm device name As part the ASoC multi-component patch (commit f0fba2ad) the jz4740 pcm driver was renamed to 'jz4740-pcm-audio'. Adjust the device name accordingly. Signed-off-by: Lars-Peter Clausen Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1770/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/jz4740/platform.c b/arch/mips/jz4740/platform.c index 95bc2b5..1cc9e54 100644 --- a/arch/mips/jz4740/platform.c +++ b/arch/mips/jz4740/platform.c @@ -208,7 +208,7 @@ struct platform_device jz4740_i2s_device = { /* PCM */ struct platform_device jz4740_pcm_device = { - .name = "jz4740-pcm", + .name = "jz4740-pcm-audio", .id = -1, }; -- cgit v0.10.2 From 190fca3e40a65303eac35ac4fbae4f1f1342431c Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Tue, 23 Nov 2010 10:26:45 -0800 Subject: MIPS: Fix regression on BCM4710 processor detection BCM4710 uses the BMIPS32 core (like BCM6345), not the MIPS 4Kc core as was previously believed. Signed-off-by: Kevin Cernekee Tested-by: Alexandros C. Couloumbis Patchwork: https://patchwork.linux-mips.org/patch/1837/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 06d59dc..8687753 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -111,8 +111,8 @@ * These are the PRID's for when 23:16 == PRID_COMP_BROADCOM */ -#define PRID_IMP_BMIPS4KC 0x4000 -#define PRID_IMP_BMIPS32 0x8000 +#define PRID_IMP_BMIPS32_REV4 0x4000 +#define PRID_IMP_BMIPS32_REV8 0x8000 #define PRID_IMP_BMIPS3300 0x9000 #define PRID_IMP_BMIPS3300_ALT 0x9100 #define PRID_IMP_BMIPS3300_BUG 0x0000 diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 71620e1..68dae7b 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -905,7 +905,8 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu) { decode_configs(c); switch (c->processor_id & 0xff00) { - case PRID_IMP_BMIPS32: + case PRID_IMP_BMIPS32_REV4: + case PRID_IMP_BMIPS32_REV8: c->cputype = CPU_BMIPS32; __cpu_name[cpu] = "Broadcom BMIPS32"; break; @@ -933,10 +934,6 @@ static inline void cpu_probe_broadcom(struct cpuinfo_mips *c, unsigned int cpu) __cpu_name[cpu] = "Broadcom BMIPS5000"; c->options |= MIPS_CPU_ULRI; break; - case PRID_IMP_BMIPS4KC: - c->cputype = CPU_4KC; - __cpu_name[cpu] = "MIPS 4Kc"; - break; } } -- cgit v0.10.2 From 5878fc936aebf592cca418ca50773cd578f7daf4 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Tue, 23 Nov 2010 10:26:44 -0800 Subject: MIPS: Fix CP0 COUNTER clockevent race Consider the following test case: write_c0_compare(read_c0_count()); Even if the counter doesn't increment during execution, this might not generate an interrupt until the counter wraps around. The CPU may perform the comparison each time CP0 COUNT increments, not when CP0 COMPARE is written. If mips_next_event() is called with a very small delta, and CP0 COUNT increments during the calculation of "cnt += delta", it is possible that CP0 COMPARE will be written with the current value of CP0 COUNT. If this is detected, the function should return -ETIME, to indicate that the interrupt might not have actually gotten scheduled. Signed-off-by: Kevin Cernekee Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/1836/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c index 2f4d7a9..98c5a97 100644 --- a/arch/mips/kernel/cevt-r4k.c +++ b/arch/mips/kernel/cevt-r4k.c @@ -32,7 +32,7 @@ static int mips_next_event(unsigned long delta, cnt = read_c0_count(); cnt += delta; write_c0_compare(cnt); - res = ((int)(read_c0_count() - cnt) > 0) ? -ETIME : 0; + res = ((int)(read_c0_count() - cnt) >= 0) ? -ETIME : 0; return res; } -- cgit v0.10.2 From e31fee7c3a197d88d1d0ced0e8600386da27fec4 Mon Sep 17 00:00:00 2001 From: Thomas Chou Date: Wed, 24 Nov 2010 15:35:48 +0800 Subject: MIPS: FDT size is a be32 The totalsize field was be32. And the reserve bootmem would cause failure. Signed-off-by: Thomas Chou To: devicetree-discuss@lists.ozlabs.org Cc: linux-kernel@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: grant.likely@secretlab.ca Cc: David Daney Cc: Dezhong Diao Patchwork: https://patchwork.linux-mips.org/patch/1838/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c index e000b27..9dbe583 100644 --- a/arch/mips/kernel/prom.c +++ b/arch/mips/kernel/prom.c @@ -100,7 +100,7 @@ void __init device_tree_init(void) return; base = virt_to_phys((void *)initial_boot_params); - size = initial_boot_params->totalsize; + size = be32_to_cpu(initial_boot_params->totalsize); /* Before we do anything, lets reserve the dt blob */ reserve_mem_mach(base, size); -- cgit v0.10.2 From 825710843640dd173bc4b2ea99f1296923e4aa06 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 27 Nov 2010 17:45:58 +0100 Subject: MIPS: BCM47xx: Do not read config from CFE The config options read out here are not stored in CFE but only in NVRAM on the devices. Remove reading from CFE and only access the NVRAM. Reading out CFE does not harm but is useless here. Signed-off-by: Hauke Mehrtens To: linux-mips@linux-mips.org Cc: Hauke Mehrtens Patchwork: https://patchwork.linux-mips.org/patch/1845/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index b1aee33..2c6bdad 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -32,7 +32,6 @@ #include #include #include -#include #include struct ssb_bus ssb_bcm47xx; @@ -82,42 +81,33 @@ static int bcm47xx_get_invariants(struct ssb_bus *bus, /* Fill boardinfo structure */ memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); - if (cfe_getenv("boardvendor", buf, sizeof(buf)) >= 0 || - nvram_getenv("boardvendor", buf, sizeof(buf)) >= 0) + if (nvram_getenv("boardvendor", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardtype", buf, sizeof(buf)) >= 0 || - nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) + if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); - if (cfe_getenv("boardrev", buf, sizeof(buf)) >= 0 || - nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) + if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) iv->boardinfo.rev = (u16)simple_strtoul(buf, NULL, 0); /* Fill sprom structure */ memset(&(iv->sprom), 0, sizeof(struct ssb_sprom)); iv->sprom.revision = 3; - if (cfe_getenv("et0macaddr", buf, sizeof(buf)) >= 0 || - nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et0mac); - if (cfe_getenv("et1macaddr", buf, sizeof(buf)) >= 0 || - nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) str2eaddr(buf, iv->sprom.et1mac); - if (cfe_getenv("et0phyaddr", buf, sizeof(buf)) >= 0 || - nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 0); - if (cfe_getenv("et1phyaddr", buf, sizeof(buf)) >= 0 || - nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 0); - if (cfe_getenv("et0mdcport", buf, sizeof(buf)) >= 0 || - nvram_getenv("et0mdcport", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et0mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et0mdcport = simple_strtoul(buf, NULL, 10); - if (cfe_getenv("et1mdcport", buf, sizeof(buf)) >= 0 || - nvram_getenv("et1mdcport", buf, sizeof(buf)) >= 0) + if (nvram_getenv("et1mdcport", buf, sizeof(buf)) >= 0) iv->sprom.et1mdcport = simple_strtoul(buf, NULL, 10); return 0; -- cgit v0.10.2 From 2aa088d6fd8a6c6e6020ea46b70141f0b7ccf5d2 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 27 Nov 2010 17:45:59 +0100 Subject: MIPS: BCM47xx: Fill values for b43 into SSB sprom Fill the sprom with all available values from the nvram. Most of these new values are needed for the b43 or b43legacy driver. Parts of this patch have been in OpenWRT for a long time and were written by Michael Buesch. Signed-off-by: Hauke Mehrtens To: linux-mips@linux-mips.org Cc: Hauke Mehrtens Patchwork: https://patchwork.linux-mips.org/patch/1846/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index 2c6bdad..1f61dfd 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -73,42 +73,112 @@ static void str2eaddr(char *str, char *dest) } } +#define READ_FROM_NVRAM(_outvar, name, buf) \ + if (nvram_getenv(name, buf, sizeof(buf)) >= 0)\ + sprom->_outvar = simple_strtoul(buf, NULL, 0); + +static void bcm47xx_fill_sprom(struct ssb_sprom *sprom) +{ + char buf[100]; + u32 boardflags; + + memset(sprom, 0, sizeof(struct ssb_sprom)); + + sprom->revision = 1; /* Fallback: Old hardware does not define this. */ + READ_FROM_NVRAM(revision, "sromrev", buf); + if (nvram_getenv("il0macaddr", buf, sizeof(buf)) >= 0) + str2eaddr(buf, sprom->il0mac); + if (nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) + str2eaddr(buf, sprom->et0mac); + if (nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) + str2eaddr(buf, sprom->et1mac); + READ_FROM_NVRAM(et0phyaddr, "et0phyaddr", buf); + READ_FROM_NVRAM(et1phyaddr, "et1phyaddr", buf); + READ_FROM_NVRAM(et0mdcport, "et0mdcport", buf); + READ_FROM_NVRAM(et1mdcport, "et1mdcport", buf); + READ_FROM_NVRAM(board_rev, "boardrev", buf); + READ_FROM_NVRAM(country_code, "ccode", buf); + READ_FROM_NVRAM(ant_available_a, "aa5g", buf); + READ_FROM_NVRAM(ant_available_bg, "aa2g", buf); + READ_FROM_NVRAM(pa0b0, "pa0b0", buf); + READ_FROM_NVRAM(pa0b1, "pa0b1", buf); + READ_FROM_NVRAM(pa0b2, "pa0b2", buf); + READ_FROM_NVRAM(pa1b0, "pa1b0", buf); + READ_FROM_NVRAM(pa1b1, "pa1b1", buf); + READ_FROM_NVRAM(pa1b2, "pa1b2", buf); + READ_FROM_NVRAM(pa1lob0, "pa1lob0", buf); + READ_FROM_NVRAM(pa1lob2, "pa1lob1", buf); + READ_FROM_NVRAM(pa1lob1, "pa1lob2", buf); + READ_FROM_NVRAM(pa1hib0, "pa1hib0", buf); + READ_FROM_NVRAM(pa1hib2, "pa1hib1", buf); + READ_FROM_NVRAM(pa1hib1, "pa1hib2", buf); + READ_FROM_NVRAM(gpio0, "wl0gpio0", buf); + READ_FROM_NVRAM(gpio1, "wl0gpio1", buf); + READ_FROM_NVRAM(gpio2, "wl0gpio2", buf); + READ_FROM_NVRAM(gpio3, "wl0gpio3", buf); + READ_FROM_NVRAM(maxpwr_bg, "pa0maxpwr", buf); + READ_FROM_NVRAM(maxpwr_al, "pa1lomaxpwr", buf); + READ_FROM_NVRAM(maxpwr_a, "pa1maxpwr", buf); + READ_FROM_NVRAM(maxpwr_ah, "pa1himaxpwr", buf); + READ_FROM_NVRAM(itssi_a, "pa1itssit", buf); + READ_FROM_NVRAM(itssi_bg, "pa0itssit", buf); + READ_FROM_NVRAM(tri2g, "tri2g", buf); + READ_FROM_NVRAM(tri5gl, "tri5gl", buf); + READ_FROM_NVRAM(tri5g, "tri5g", buf); + READ_FROM_NVRAM(tri5gh, "tri5gh", buf); + READ_FROM_NVRAM(rxpo2g, "rxpo2g", buf); + READ_FROM_NVRAM(rxpo5g, "rxpo5g", buf); + READ_FROM_NVRAM(rssisav2g, "rssisav2g", buf); + READ_FROM_NVRAM(rssismc2g, "rssismc2g", buf); + READ_FROM_NVRAM(rssismf2g, "rssismf2g", buf); + READ_FROM_NVRAM(bxa2g, "bxa2g", buf); + READ_FROM_NVRAM(rssisav5g, "rssisav5g", buf); + READ_FROM_NVRAM(rssismc5g, "rssismc5g", buf); + READ_FROM_NVRAM(rssismf5g, "rssismf5g", buf); + READ_FROM_NVRAM(bxa5g, "bxa5g", buf); + READ_FROM_NVRAM(cck2gpo, "cck2gpo", buf); + READ_FROM_NVRAM(ofdm2gpo, "ofdm2gpo", buf); + READ_FROM_NVRAM(ofdm5glpo, "ofdm5glpo", buf); + READ_FROM_NVRAM(ofdm5gpo, "ofdm5gpo", buf); + READ_FROM_NVRAM(ofdm5ghpo, "ofdm5ghpo", buf); + + if (nvram_getenv("boardflags", buf, sizeof(buf)) >= 0) { + boardflags = simple_strtoul(buf, NULL, 0); + if (boardflags) { + sprom->boardflags_lo = (boardflags & 0x0000FFFFU); + sprom->boardflags_hi = (boardflags & 0xFFFF0000U) >> 16; + } + } + if (nvram_getenv("boardflags2", buf, sizeof(buf)) >= 0) { + boardflags = simple_strtoul(buf, NULL, 0); + if (boardflags) { + sprom->boardflags2_lo = (boardflags & 0x0000FFFFU); + sprom->boardflags2_hi = (boardflags & 0xFFFF0000U) >> 16; + } + } +} + static int bcm47xx_get_invariants(struct ssb_bus *bus, struct ssb_init_invariants *iv) { - char buf[100]; + char buf[20]; /* Fill boardinfo structure */ memset(&(iv->boardinfo), 0 , sizeof(struct ssb_boardinfo)); if (nvram_getenv("boardvendor", buf, sizeof(buf)) >= 0) - iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); + iv->boardinfo.vendor = (u16)simple_strtoul(buf, NULL, 0); + else + iv->boardinfo.vendor = SSB_BOARDVENDOR_BCM; if (nvram_getenv("boardtype", buf, sizeof(buf)) >= 0) iv->boardinfo.type = (u16)simple_strtoul(buf, NULL, 0); if (nvram_getenv("boardrev", buf, sizeof(buf)) >= 0) iv->boardinfo.rev = (u16)simple_strtoul(buf, NULL, 0); - /* Fill sprom structure */ - memset(&(iv->sprom), 0, sizeof(struct ssb_sprom)); - iv->sprom.revision = 3; - - if (nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) - str2eaddr(buf, iv->sprom.et0mac); - - if (nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) - str2eaddr(buf, iv->sprom.et1mac); - - if (nvram_getenv("et0phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et0phyaddr = simple_strtoul(buf, NULL, 0); - - if (nvram_getenv("et1phyaddr", buf, sizeof(buf)) >= 0) - iv->sprom.et1phyaddr = simple_strtoul(buf, NULL, 0); - - if (nvram_getenv("et0mdcport", buf, sizeof(buf)) >= 0) - iv->sprom.et0mdcport = simple_strtoul(buf, NULL, 10); + bcm47xx_fill_sprom(&iv->sprom); - if (nvram_getenv("et1mdcport", buf, sizeof(buf)) >= 0) - iv->sprom.et1mdcport = simple_strtoul(buf, NULL, 10); + if (nvram_getenv("cardbus", buf, sizeof(buf)) >= 0) + iv->has_cardbus_slot = !!simple_strtoul(buf, NULL, 10); return 0; } -- cgit v0.10.2 From 59833fcf48ee7b7c8a01e590aa7b7212305c3077 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 27 Nov 2010 17:46:00 +0100 Subject: MIPS: BCM47xx: Use sscanf for parsing mac address Instead of writing own function for parsing the mac address we now use sscanf. Signed-off-by: Hauke Mehrtens To: linux-mips@linux-mips.org Cc: Hauke Mehrtens Patchwork: https://patchwork.linux-mips.org/patch/1847/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index 1f61dfd..87a3055 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -56,23 +56,6 @@ static void bcm47xx_machine_halt(void) cpu_relax(); } -static void str2eaddr(char *str, char *dest) -{ - int i = 0; - - if (str == NULL) { - memset(dest, 0, 6); - return; - } - - for (;;) { - dest[i++] = (char) simple_strtoul(str, NULL, 16); - str += 2; - if (!*str++ || i == 6) - break; - } -} - #define READ_FROM_NVRAM(_outvar, name, buf) \ if (nvram_getenv(name, buf, sizeof(buf)) >= 0)\ sprom->_outvar = simple_strtoul(buf, NULL, 0); @@ -87,11 +70,11 @@ static void bcm47xx_fill_sprom(struct ssb_sprom *sprom) sprom->revision = 1; /* Fallback: Old hardware does not define this. */ READ_FROM_NVRAM(revision, "sromrev", buf); if (nvram_getenv("il0macaddr", buf, sizeof(buf)) >= 0) - str2eaddr(buf, sprom->il0mac); + nvram_parse_macaddr(buf, sprom->il0mac); if (nvram_getenv("et0macaddr", buf, sizeof(buf)) >= 0) - str2eaddr(buf, sprom->et0mac); + nvram_parse_macaddr(buf, sprom->et0mac); if (nvram_getenv("et1macaddr", buf, sizeof(buf)) >= 0) - str2eaddr(buf, sprom->et1mac); + nvram_parse_macaddr(buf, sprom->et1mac); READ_FROM_NVRAM(et0phyaddr, "et0phyaddr", buf); READ_FROM_NVRAM(et1phyaddr, "et1phyaddr", buf); READ_FROM_NVRAM(et0mdcport, "et0mdcport", buf); diff --git a/arch/mips/include/asm/mach-bcm47xx/nvram.h b/arch/mips/include/asm/mach-bcm47xx/nvram.h index c58ebd8..9759588 100644 --- a/arch/mips/include/asm/mach-bcm47xx/nvram.h +++ b/arch/mips/include/asm/mach-bcm47xx/nvram.h @@ -12,6 +12,7 @@ #define __NVRAM_H #include +#include struct nvram_header { u32 magic; @@ -36,4 +37,10 @@ struct nvram_header { extern int nvram_getenv(char *name, char *val, size_t val_len); +static inline void nvram_parse_macaddr(char *buf, u8 *macaddr) +{ + sscanf(buf, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &macaddr[0], &macaddr[1], + &macaddr[2], &macaddr[3], &macaddr[4], &macaddr[5]); +} + #endif -- cgit v0.10.2 From 1690a7f9ab83f5c823f3044275a4a771a059d5bb Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 27 Nov 2010 17:46:01 +0100 Subject: MIPS: BCM47xx: Swap serial console if ttyS1 was specified. Some devices like the Netgear WGT634U are using ttyS1 for default console output. We should switch to that console if it was given in the kernel_args parameters. Signed-off-by: Hauke Mehrtens To: linux-mips@linux-mips.org Cc: Hauke Mehrtens Patchwork: https://patchwork.linux-mips.org/patch/1848/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/bcm47xx/setup.c b/arch/mips/bcm47xx/setup.c index 87a3055..c95f90b 100644 --- a/arch/mips/bcm47xx/setup.c +++ b/arch/mips/bcm47xx/setup.c @@ -169,12 +169,28 @@ static int bcm47xx_get_invariants(struct ssb_bus *bus, void __init plat_mem_setup(void) { int err; + char buf[100]; + struct ssb_mipscore *mcore; err = ssb_bus_ssbbus_register(&ssb_bcm47xx, SSB_ENUM_BASE, bcm47xx_get_invariants); if (err) panic("Failed to initialize SSB bus (err %d)\n", err); + mcore = &ssb_bcm47xx.mipscore; + if (nvram_getenv("kernel_args", buf, sizeof(buf)) >= 0) { + if (strstr(buf, "console=ttyS1")) { + struct ssb_serial_port port; + + printk(KERN_DEBUG "Swapping serial ports!\n"); + /* swap serial ports */ + memcpy(&port, &mcore->serial_ports[0], sizeof(port)); + memcpy(&mcore->serial_ports[0], &mcore->serial_ports[1], + sizeof(port)); + memcpy(&mcore->serial_ports[1], &port, sizeof(port)); + } + } + _machine_restart = bcm47xx_machine_restart; _machine_halt = bcm47xx_machine_halt; pm_power_off = bcm47xx_machine_halt; -- cgit v0.10.2 From 3f84622d7c7818077f5e6cf4b8a0d1b10dc65147 Mon Sep 17 00:00:00 2001 From: Hauke Mehrtens Date: Sat, 27 Nov 2010 19:26:32 +0100 Subject: SSB: Fix nvram_get on BCM47xx platform The nvram_get function was never in the mainline kernel, it only existed in an external OpenWrt patch. Use nvram_getenv function, which is in mainline and use an include instead of an extra function declaration. et0macaddr contains the mac address in text from like 00:11:22:33:44:55. We have to parse it before adding it into macaddr. nvram_parse_macaddr will be merged into asm/mach-bcm47xx/nvram.h through the MIPS git tree and will be available soon. It will not build now without nvram_parse_macaddr, but it hasn't before either. Signed-off-by: Hauke Mehrtens To: linux-mips@linux-mips.org Cc: mb@bu3sch.de Cc: netdev@vger.kernel.org Cc: Hauke Mehrtens Acked-by: Michael Buesch Patchwork: https://patchwork.linux-mips.org/patch/1849/ Signed-off-by: Ralf Baechle diff --git a/include/linux/ssb/ssb_driver_gige.h b/include/linux/ssb/ssb_driver_gige.h index 942e387..eba52a1 100644 --- a/include/linux/ssb/ssb_driver_gige.h +++ b/include/linux/ssb/ssb_driver_gige.h @@ -96,16 +96,21 @@ static inline bool ssb_gige_must_flush_posted_writes(struct pci_dev *pdev) return 0; } -extern char * nvram_get(const char *name); +#ifdef CONFIG_BCM47XX +#include /* Get the device MAC address */ static inline void ssb_gige_get_macaddr(struct pci_dev *pdev, u8 *macaddr) { -#ifdef CONFIG_BCM47XX - char *res = nvram_get("et0macaddr"); - if (res) - memcpy(macaddr, res, 6); -#endif + char buf[20]; + if (nvram_getenv("et0macaddr", buf, sizeof(buf)) < 0) + return; + nvram_parse_macaddr(buf, macaddr); } +#else +static inline void ssb_gige_get_macaddr(struct pci_dev *pdev, u8 *macaddr) +{ +} +#endif extern int ssb_gige_pcibios_plat_dev_init(struct ssb_device *sdev, struct pci_dev *pdev); -- cgit v0.10.2 From d002aaadf84c081623a0a8502c122d1492fbd47c Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 1 Dec 2010 17:33:17 +0000 Subject: MIPS: MT: Fix typo in comment. Signed-off-by: Ralf Baechle diff --git a/arch/mips/kernel/smp-mt.c b/arch/mips/kernel/smp-mt.c index 43e7cdc5..c0e8141 100644 --- a/arch/mips/kernel/smp-mt.c +++ b/arch/mips/kernel/smp-mt.c @@ -153,7 +153,7 @@ static void __cpuinit vsmp_init_secondary(void) { extern int gic_present; - /* This is Malta specific: IPI,performance and timer inetrrupts */ + /* This is Malta specific: IPI,performance and timer interrupts */ if (gic_present) change_c0_status(ST0_IM, STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP6 | STATUSF_IP7); -- cgit v0.10.2 From a3aad4aaf871045ab1dd9c99be6c1ace881d8eb0 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 9 Dec 2010 19:14:09 +0000 Subject: MIPS: Rename mips_dma_cache_sync back to dma_cache_sync This fixes IP22 and IP28 build errors. Signed-off-by: Ralf Baechle diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c index 4fc1a0f..21ea14e 100644 --- a/arch/mips/mm/dma-default.c +++ b/arch/mips/mm/dma-default.c @@ -288,7 +288,7 @@ int mips_dma_supported(struct device *dev, u64 mask) return plat_dma_supported(dev, mask); } -void mips_dma_cache_sync(struct device *dev, void *vaddr, size_t size, +void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction direction) { BUG_ON(direction == DMA_NONE); @@ -298,6 +298,8 @@ void mips_dma_cache_sync(struct device *dev, void *vaddr, size_t size, __dma_sync((unsigned long)vaddr, size, direction); } +EXPORT_SYMBOL(dma_cache_sync); + static struct dma_map_ops mips_default_dma_map_ops = { .alloc_coherent = mips_dma_alloc_coherent, .free_coherent = mips_dma_free_coherent, -- cgit v0.10.2 From cf745a39dcb10ef80c4a2ff38448f57b69d4c4eb Mon Sep 17 00:00:00 2001 From: Manuel Lauss Date: Mon, 25 Oct 2010 18:44:11 +0200 Subject: MIPS: Alchemy: fix build with SERIAL_8250=n In commit 7d172bfe ("Alchemy: Add UART PM methods") I introduced platform PM methods which call a function of the 8250 driver; this patch works around link failures when the kernel is built without 8250 support. Signed-off-by: Manuel Lauss To: Linux-MIPS Patchwork: https://patchwork.linux-mips.org/patch/1737/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/alchemy/common/platform.c b/arch/mips/alchemy/common/platform.c index 3691630..9e7814d 100644 --- a/arch/mips/alchemy/common/platform.c +++ b/arch/mips/alchemy/common/platform.c @@ -27,6 +27,7 @@ static void alchemy_8250_pm(struct uart_port *port, unsigned int state, unsigned int old_state) { +#ifdef CONFIG_SERIAL_8250 switch (state) { case 0: if ((__raw_readl(port->membase + UART_MOD_CNTRL) & 3) != 3) { @@ -49,6 +50,7 @@ static void alchemy_8250_pm(struct uart_port *port, unsigned int state, serial8250_do_pm(port, state, old_state); break; } +#endif } #define PORT(_base, _irq) \ -- cgit v0.10.2 From 82b89152f00f7ad17844d5614d5011e8d7944ac9 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Sun, 10 Oct 2010 10:42:12 +0100 Subject: MIPS: LD/SD o32 macro GAS fix update I am about to commit: http://sourceware.org/ml/binutils/2010-10/msg00033.html that fixes a problem with the LD/SD macro currently implemented by GAS for the o32 ABI in an inconsistent way. This is best illustrated with a simple program, which I'm copying here from the message above for easier reference: $ cat ld.s ld $5,32767($4) ld $5,32768($4) This gets assebled into the following output: $ mips-linux-as -32 -mips3 -o ld.o ld.s $ mips-linux-objdump -d ld.o ld.o: file format elf32-tradbigmips Disassembly of section .text: 00000000 <.text>: 0: dc857fff ld a1,32767(a0) 4: 3c010001 lui at,0x1 8: 00810821 addu at,a0,at c: 8c258000 lw a1,-32768(at) 10: 8c268004 lw a2,-32764(at) ... Oops! The GAS fix makes the macro behave in a consistent way and pairs of LW/SW instructions to be output as appropriate regardless of the size of the offset associated with the address used. The machine instruction is still available, but to reach it macros have to be disabled first. This has a side effect of requiring the use of a machine-addressable memory operand. As some platforms require 64-bit operations for accesses to some I/O registers LD/SD instructions are used in a couple of places in Linux regardless of the ABI selected. Here's a fix for some pieces of code affected I've been able to track down. The fix should be backwards compatible with all supported binutils releases in existence and can be used as a reference for any other places or off-tree code. The use of the "R" constraint guarantees a machine-addressable operand. Signed-off-by: Maciej W. Rozycki Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1680/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h index c98bf51..5b017f2 100644 --- a/arch/mips/include/asm/io.h +++ b/arch/mips/include/asm/io.h @@ -329,10 +329,14 @@ static inline void pfx##write##bwlq(type val, \ "dsrl32 %L0, %L0, 0" "\n\t" \ "dsll32 %M0, %M0, 0" "\n\t" \ "or %L0, %L0, %M0" "\n\t" \ + ".set push" "\n\t" \ + ".set noreorder" "\n\t" \ + ".set nomacro" "\n\t" \ "sd %L0, %2" "\n\t" \ + ".set pop" "\n\t" \ ".set mips0" "\n" \ : "=r" (__tmp) \ - : "0" (__val), "m" (*__mem)); \ + : "0" (__val), "R" (*__mem)); \ if (irq) \ local_irq_restore(__flags); \ } else \ @@ -355,12 +359,16 @@ static inline type pfx##read##bwlq(const volatile void __iomem *mem) \ local_irq_save(__flags); \ __asm__ __volatile__( \ ".set mips3" "\t\t# __readq" "\n\t" \ + ".set push" "\n\t" \ + ".set noreorder" "\n\t" \ + ".set nomacro" "\n\t" \ "ld %L0, %1" "\n\t" \ + ".set pop" "\n\t" \ "dsra32 %M0, %L0, 0" "\n\t" \ "sll %L0, %L0, 0" "\n\t" \ ".set mips0" "\n" \ : "=r" (__val) \ - : "m" (*__mem)); \ + : "R" (*__mem)); \ if (irq) \ local_irq_restore(__flags); \ } else { \ diff --git a/arch/mips/pmc-sierra/yosemite/py-console.c b/arch/mips/pmc-sierra/yosemite/py-console.c index b7f1d9c..434d7b1 100644 --- a/arch/mips/pmc-sierra/yosemite/py-console.c +++ b/arch/mips/pmc-sierra/yosemite/py-console.c @@ -65,11 +65,15 @@ static unsigned char readb_outer_space(unsigned long long phys) __asm__ __volatile__ ( " .set mips3 \n" + " .set push \n" + " .set noreorder \n" + " .set nomacro \n" " ld %0, %1 \n" + " .set pop \n" " lbu %0, (%0) \n" " .set mips0 \n" : "=r" (res) - : "m" (vaddr)); + : "R" (vaddr)); write_c0_status(sr); ssnop_4(); @@ -89,11 +93,15 @@ static void writeb_outer_space(unsigned long long phys, unsigned char c) __asm__ __volatile__ ( " .set mips3 \n" + " .set push \n" + " .set noreorder \n" + " .set nomacro \n" " ld %0, %1 \n" + " .set pop \n" " sb %2, (%0) \n" " .set mips0 \n" : "=&r" (tmp) - : "m" (vaddr), "r" (c)); + : "R" (vaddr), "r" (c)); write_c0_status(sr); ssnop_4(); -- cgit v0.10.2 From c9bace7ca1e2aeb95754ebc92c8f88a9f215691d Mon Sep 17 00:00:00 2001 From: David Daney Date: Mon, 11 Oct 2010 14:52:45 -0700 Subject: MIPS: Add a CONFIG_FORCE_MAX_ZONEORDER Kconfig option. For huge page support with base page size of 16K or 32K, we have to increase the MAX_ORDER so that huge pages can be allocated. [Ralf: I don't think a user should have to configure obscure constants like this but for the time being this will have to suffice.] Signed-off-by: David Daney To: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/1685/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 7fc6bd1..0a9b5b8 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1666,6 +1666,28 @@ config PAGE_SIZE_64KB endchoice +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + range 13 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB + default "13" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_32KB + range 12 64 if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB + default "12" if SYS_SUPPORTS_HUGETLBFS && PAGE_SIZE_16KB + range 11 64 + default "11" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + This config option is actually maximum order plus one. For example, + a value of 11 means that the largest free memory block is 2^10 pages. + + The page size is not necessarily 4KB. Keep this in mind + when choosing a value for this option. + config BOARD_SCACHE bool -- cgit v0.10.2 From be7a7411d63ccad165d66fe8e0b11b2ee336159b Mon Sep 17 00:00:00 2001 From: Ken Mills Date: Mon, 13 Dec 2010 15:27:27 +0000 Subject: n_gsm: Fix message length handling when building header Fix message length handling when building header When the message length is greater than 127, the length field in the header is built incorrectly. According to the spec, when the length is less than 128 the length field is a single byte formatted as: bbbbbbb1. When it is greater than 127 then the field is two bytes of the format: bbbbbbb0 bbbbbbbb. Signed-off-by: Ken Mills Signed-off-by: Alan Cox Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 81b4658..2fc5cf2 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -716,8 +716,8 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) if (msg->len < 128) *--dp = (msg->len << 1) | EA; else { - *--dp = ((msg->len & 127) << 1) | EA; - *--dp = (msg->len >> 6) & 0xfe; + *--dp = (msg->len >> 7); /* bits 7 - 15 */ + *--dp = (msg->len & 127) << 1; /* bits 0 - 6 */ } } -- cgit v0.10.2 From 093d804611b9a38fe59753b37c29f840518406a9 Mon Sep 17 00:00:00 2001 From: Ken Mills Date: Mon, 13 Dec 2010 15:28:03 +0000 Subject: n_gsm: gsm_data_alloc buffer allocation could fail and it is not being checked gsm_data_alloc buffer allocation could fail and it is not being checked. Add check for allocated buffer and return if the buffer allocation fails. Signed-off-by: Ken Mills Signed-off-by: Alan Cox Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 2fc5cf2..c5f8e5b 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -968,6 +968,8 @@ static void gsm_control_reply(struct gsm_mux *gsm, int cmd, u8 *data, { struct gsm_msg *msg; msg = gsm_data_alloc(gsm, 0, dlen + 2, gsm->ftype); + if (msg == NULL) + return; msg->data[0] = (cmd & 0xFE) << 1 | EA; /* Clear C/R */ msg->data[1] = (dlen << 1) | EA; memcpy(msg->data + 2, data, dlen); -- cgit v0.10.2 From 49c2fa08a77a7eefa4cbc73601f64984aceacfa7 Mon Sep 17 00:00:00 2001 From: Neil Horman Date: Wed, 8 Dec 2010 09:47:48 -0500 Subject: PCI: Update MCP55 quirk to not affect non HyperTransport variants MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit I wrote this quirk awhile ago to properly setup MCP55 chips on hypertransport busses so that interrupts reached whatever cpu happend to boot the kdump kernel. while that works well, it was recently shown to me that a a non-hypertransport variant of the MCP55 exists, and on those system the register that this quirk manipulates causes hangs if you write to it. Since the quirk was only meant to handle errors found on MCP55 chips that have a HT interface, this patch adds a filter to make sure the chip is an HT capable before making the needed register adjustment. This lets the broken MCP55s work with kdump while not breaking the non-HT variants. Resolves https://bugzilla.kernel.org/show_bug.cgi?id=23952 Tested successfully by the reporter and myself. Cc: stable@kernel.org Reported-by: Mathieu Bérard Acked-by: Vivek Goyal Signed-off-by: Neil Horman Signed-off-by: Jesse Barnes diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 6f9350c..313c0bd 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -2329,6 +2329,9 @@ static void __devinit nvbridge_check_legacy_irq_routing(struct pci_dev *dev) { u32 cfg; + if (!pci_find_capability(dev, PCI_CAP_ID_HT)) + return; + pci_read_config_dword(dev, 0x74, &cfg); if (cfg & ((1 << 2) | (1 << 15))) { -- cgit v0.10.2 From f4ce9084476dc518bfd0f35f62f4bd0a130893e0 Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Thu, 16 Dec 2010 14:32:24 +0530 Subject: USB: core: Add input prompt and help text for USB_OTG config bd6882 commit (usb: gadget: fix Kconfig warning) removes the duplicate USB_OTG config from gadget/Kconfig. But does not copy the input prompt and help text to the original config defined in core/Kconfig. Add them now. Signed-off-by: Pavankumar Kondeti Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig index 9eed5b5..bcc2477 100644 --- a/drivers/usb/core/Kconfig +++ b/drivers/usb/core/Kconfig @@ -107,11 +107,19 @@ config USB_SUSPEND If you are unsure about this, say N here. config USB_OTG - bool + bool "OTG support" depends on USB && EXPERIMENTAL depends on USB_SUSPEND default n - + help + The most notable feature of USB OTG is support for a + "Dual-Role" device, which can act as either a device + or a host. The initial role is decided by the type of + plug inserted and can be changed later when two dual + role devices talk to each other. + + Select this only if your board has Mini-AB/Micro-AB + connector. config USB_OTG_WHITELIST bool "Rely on OTG Targeted Peripherals List" -- cgit v0.10.2 From daba58035a044cae75488175a96cc18362a64518 Mon Sep 17 00:00:00 2001 From: Pavankumar Kondeti Date: Thu, 16 Dec 2010 14:32:25 +0530 Subject: USB: gadget: Remove suspended sysfs file before freeing cdev cdev struct is accessed in suspended sysfs show function. So remove sysfs file before freeing the cdev in composite_unbind. Signed-off-by: Pavankumar Kondeti Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 7b5cc16..96413a2 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -1047,9 +1047,9 @@ composite_unbind(struct usb_gadget *gadget) kfree(cdev->req->buf); usb_ep_free_request(gadget->ep0, cdev->req); } + device_remove_file(&gadget->dev, &dev_attr_suspended); kfree(cdev); set_gadget_data(gadget, NULL); - device_remove_file(&gadget->dev, &dev_attr_suspended); composite = NULL; } -- cgit v0.10.2 From d73a9b3001f29271c2e9f2a806b05a431c5d9591 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Tue, 14 Dec 2010 10:16:49 -0500 Subject: USB: usb-storage: unusual_devs entry for the Samsung YP-CP3 Add an unusual_devs entry for the Samsung YP-CP3 MP4 player. User was getting the following errors in dmesg: usb 2-6: reset high speed USB device using ehci_hcd and address 2 usb 2-6: reset high speed USB device using ehci_hcd and address 2 usb 2-6: reset high speed USB device using ehci_hcd and address 2 usb 2-6: USB disconnect, address 2 sd 3:0:0:0: [sdb] Assuming drive cache: write through sdb:<2>ldm_validate_partition_table(): Disk read failed. Dev sdb: unable to read RDB block 0 unable to read partition table Signed-off-by: Vitaly Kuznetsov Acked-by: Alan Stern CC: Matthew Dharm CC: stable@kernel.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h index 6ccdd3d..fcc1e32 100644 --- a/drivers/usb/storage/unusual_devs.h +++ b/drivers/usb/storage/unusual_devs.h @@ -481,6 +481,13 @@ UNUSUAL_DEV( 0x04e8, 0x507c, 0x0220, 0x0220, USB_SC_DEVICE, USB_PR_DEVICE, NULL, US_FL_MAX_SECTORS_64), +/* Reported by Vitaly Kuznetsov */ +UNUSUAL_DEV( 0x04e8, 0x5122, 0x0000, 0x9999, + "Samsung", + "YP-CP3", + USB_SC_DEVICE, USB_PR_DEVICE, NULL, + US_FL_MAX_SECTORS_64 | US_FL_BULK_IGNORE_TAG), + /* Entry and supporting patch by Theodore Kilgore . * Device uses standards-violating 32-byte Bulk Command Block Wrappers and * reports itself as "Proprietary SCSI Bulk." Cf. device entry 0x084d:0x0011. -- cgit v0.10.2 From ecc1624a2fff45780959efbcb73ace18fdb3c58d Mon Sep 17 00:00:00 2001 From: Thomas Sailer Date: Tue, 14 Dec 2010 16:04:05 +0100 Subject: USB: misc: uss720.c: add another vendor/product ID Fabio Battaglia report that he has another cable that works with this driver, so this patch adds its vendor/product ID. Signed-off-by: Thomas Sailer Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/misc/uss720.c b/drivers/usb/misc/uss720.c index 796e2f6..4ff2158 100644 --- a/drivers/usb/misc/uss720.c +++ b/drivers/usb/misc/uss720.c @@ -3,7 +3,7 @@ /* * uss720.c -- USS720 USB Parport Cable. * - * Copyright (C) 1999, 2005 + * Copyright (C) 1999, 2005, 2010 * Thomas Sailer (t.sailer@alumni.ethz.ch) * * This program is free software; you can redistribute it and/or modify @@ -776,6 +776,8 @@ static const struct usb_device_id uss720_table[] = { { USB_DEVICE(0x0557, 0x2001) }, { USB_DEVICE(0x0729, 0x1284) }, { USB_DEVICE(0x1293, 0x0002) }, + { USB_DEVICE(0x1293, 0x0002) }, + { USB_DEVICE(0x050d, 0x0002) }, { } /* Terminating entry */ }; -- cgit v0.10.2 From dbb442b85a1d82f91cfe0524c4f9b3a5196a10ca Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Thu, 16 Dec 2010 15:52:30 -0800 Subject: Revert "USB: gadget: Allow function access to device ID data during bind()" This reverts commit 1ab83238740ff1e1773d5c13ecac43c60cf4aec4. Turns out this doesn't allow for the device ids to be overridden properly, so we need to revert the thing. Reported-by: Jef Driesen Cc: Robert Lukassen Cc: stable Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 96413a2..8572dad 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -1107,14 +1107,6 @@ static int composite_bind(struct usb_gadget *gadget) */ usb_ep_autoconfig_reset(cdev->gadget); - /* standardized runtime overrides for device ID data */ - if (idVendor) - cdev->desc.idVendor = cpu_to_le16(idVendor); - if (idProduct) - cdev->desc.idProduct = cpu_to_le16(idProduct); - if (bcdDevice) - cdev->desc.bcdDevice = cpu_to_le16(bcdDevice); - /* composite gadget needs to assign strings for whole device (like * serial number), register function drivers, potentially update * power state and consumption, etc @@ -1126,6 +1118,14 @@ static int composite_bind(struct usb_gadget *gadget) cdev->desc = *composite->dev; cdev->desc.bMaxPacketSize0 = gadget->ep0->maxpacket; + /* standardized runtime overrides for device ID data */ + if (idVendor) + cdev->desc.idVendor = cpu_to_le16(idVendor); + if (idProduct) + cdev->desc.idProduct = cpu_to_le16(idProduct); + if (bcdDevice) + cdev->desc.bcdDevice = cpu_to_le16(bcdDevice); + /* stirng overrides */ if (iManufacturer || !cdev->desc.iManufacturer) { if (!iManufacturer && !composite->iManufacturer && -- cgit v0.10.2 From 147dd5610c8d1bacb88a6c1dfdaceaf257946ed0 Mon Sep 17 00:00:00 2001 From: "H. Peter Anvin" Date: Thu, 16 Dec 2010 19:11:09 -0800 Subject: x86-32: Make sure we can map all of lowmem if we need to A relocatable kernel can be anywhere in lowmem -- and in the case of a kdump kernel, is likely to be fairly high. Since the early page tables map everything from address zero up we need to make sure we allocate enough brk that we can map all of lowmem if we need to. Reported-by: Stanislaw Gruszka Signed-off-by: H. Peter Anvin Tested-by: Yinghai Lu LKML-Reference: <4D0AD3ED.8070607@kernel.org> diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 23f315c..325c052 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -355,7 +355,7 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap, if (heap > 0x3fffffffffffUL) error("Destination address too large"); #else - if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff)) + if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff)) error("Destination address too large"); #endif #ifndef CONFIG_RELOCATABLE diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S index bcece91..d7cdf5b 100644 --- a/arch/x86/kernel/head_32.S +++ b/arch/x86/kernel/head_32.S @@ -60,16 +60,18 @@ #define PAGE_TABLE_SIZE(pages) ((pages) / PTRS_PER_PGD) #endif +/* Number of possible pages in the lowmem region */ +LOWMEM_PAGES = (((1<<32) - __PAGE_OFFSET) >> PAGE_SHIFT) + /* Enough space to fit pagetables for the low memory linear map */ -MAPPING_BEYOND_END = \ - PAGE_TABLE_SIZE(((1<<32) - __PAGE_OFFSET) >> PAGE_SHIFT) << PAGE_SHIFT +MAPPING_BEYOND_END = PAGE_TABLE_SIZE(LOWMEM_PAGES) << PAGE_SHIFT /* * Worst-case size of the kernel mapping we need to make: - * the worst-case size of the kernel itself, plus the extra we need - * to map for the linear map. + * a relocatable kernel can live anywhere in lowmem, so we need to be able + * to map all of lowmem. */ -KERNEL_PAGES = (KERNEL_IMAGE_SIZE + MAPPING_BEYOND_END)>>PAGE_SHIFT +KERNEL_PAGES = LOWMEM_PAGES INIT_MAP_SIZE = PAGE_TABLE_SIZE(KERNEL_PAGES) * PAGE_SIZE_asm RESERVE_BRK(pagetables, INIT_MAP_SIZE) -- cgit v0.10.2 From 258b78c364b9d3f730b5e3187fc500d472b5c237 Mon Sep 17 00:00:00 2001 From: Kukjin Kim Date: Fri, 3 Dec 2010 21:22:42 +0900 Subject: ARM: S3C24XX: Fix CONFIG_S3C_DEV_NAND Kconfig entry Should be CONFIG_S3C_DEV_NAND instead of CONFIG_S3C_DEVICE_NAND. Cc: Ben Dooks Signed-off-by: Kukjin Kim diff --git a/arch/arm/plat-s3c24xx/Kconfig b/arch/arm/plat-s3c24xx/Kconfig index 5a27b1b..eb105e6 100644 --- a/arch/arm/plat-s3c24xx/Kconfig +++ b/arch/arm/plat-s3c24xx/Kconfig @@ -8,7 +8,7 @@ config PLAT_S3C24XX default y select NO_IOPORT select ARCH_REQUIRE_GPIOLIB - select S3C_DEVICE_NAND + select S3C_DEV_NAND select S3C_GPIO_CFG_S3C24XX help Base platform code for any Samsung S3C24XX device -- cgit v0.10.2 From 0f8f9c2b6c1326e99e51729a5d4aeb9c3ce164e1 Mon Sep 17 00:00:00 2001 From: Yauhen Kharuzhy Date: Fri, 17 Dec 2010 14:45:01 +0900 Subject: ARM S3C24XX: Fix compilation of PM code for S3C2416 S3C2416 PM code uses low-level sleep routines from S3C2412 code, but these routines are compiled only for S3C2412 SoC. Split S3C2412_PM to two parts: S3C2412_PM, S3C2412_PM_SLEEP and select last in S3C2416's Kconfig. Signed-off-by: Yauhen Kharuzhy Signed-off-by: Kukjin Kim diff --git a/arch/arm/mach-s3c2412/Kconfig b/arch/arm/mach-s3c2412/Kconfig index fa2e5bf..6983cb4 100644 --- a/arch/arm/mach-s3c2412/Kconfig +++ b/arch/arm/mach-s3c2412/Kconfig @@ -28,9 +28,16 @@ config S3C2412_DMA config S3C2412_PM bool + select S3C2412_PM_SLEEP help Internal config node to apply S3C2412 power management +config S3C2412_PM_SLEEP + bool + help + Internal config node to apply sleep for S3C2412 power management. + Can be selected by another SoCs with similar sleep procedure. + # Note, the S3C2412 IOtiming support is in plat-s3c24xx config S3C2412_CPUFREQ diff --git a/arch/arm/mach-s3c2412/Makefile b/arch/arm/mach-s3c2412/Makefile index 530ec46..6c48a91 100644 --- a/arch/arm/mach-s3c2412/Makefile +++ b/arch/arm/mach-s3c2412/Makefile @@ -14,7 +14,8 @@ obj-$(CONFIG_CPU_S3C2412) += irq.o obj-$(CONFIG_CPU_S3C2412) += clock.o obj-$(CONFIG_CPU_S3C2412) += gpio.o obj-$(CONFIG_S3C2412_DMA) += dma.o -obj-$(CONFIG_S3C2412_PM) += pm.o sleep.o +obj-$(CONFIG_S3C2412_PM) += pm.o +obj-$(CONFIG_S3C2412_PM_SLEEP) += sleep.o obj-$(CONFIG_S3C2412_CPUFREQ) += cpu-freq.o # Machine support diff --git a/arch/arm/mach-s3c2416/Kconfig b/arch/arm/mach-s3c2416/Kconfig index 27b3e7c..df8d149 100644 --- a/arch/arm/mach-s3c2416/Kconfig +++ b/arch/arm/mach-s3c2416/Kconfig @@ -27,6 +27,7 @@ config S3C2416_DMA config S3C2416_PM bool + select S3C2412_PM_SLEEP help Internal config node to apply S3C2416 power management -- cgit v0.10.2 From cb1868869dce7b751b670aadfc1f1360bc224b29 Mon Sep 17 00:00:00 2001 From: Marek Szyprowski Date: Fri, 17 Dec 2010 14:47:42 +0900 Subject: ARM: S5PV210: update MAX8998 platform data to get rid of WARN() This patch adds new entries required by the new version of MAX8998 driver. Without them, the driver fails to init. See commit 50f19a4596 Signed-off-by: Marek Szyprowski Signed-off-by: Kyungmin Park Signed-off-by: Kukjin Kim diff --git a/arch/arm/mach-s5pv210/mach-aquila.c b/arch/arm/mach-s5pv210/mach-aquila.c index 28677ca..461aa035 100644 --- a/arch/arm/mach-s5pv210/mach-aquila.c +++ b/arch/arm/mach-s5pv210/mach-aquila.c @@ -378,6 +378,12 @@ static struct max8998_regulator_data aquila_regulators[] = { static struct max8998_platform_data aquila_max8998_pdata = { .num_regulators = ARRAY_SIZE(aquila_regulators), .regulators = aquila_regulators, + .buck1_set1 = S5PV210_GPH0(3), + .buck1_set2 = S5PV210_GPH0(4), + .buck2_set3 = S5PV210_GPH0(5), + .buck1_max_voltage1 = 1200000, + .buck1_max_voltage2 = 1200000, + .buck2_max_voltage = 1200000, }; #endif diff --git a/arch/arm/mach-s5pv210/mach-goni.c b/arch/arm/mach-s5pv210/mach-goni.c index b1dcf96..e22d511 100644 --- a/arch/arm/mach-s5pv210/mach-goni.c +++ b/arch/arm/mach-s5pv210/mach-goni.c @@ -518,6 +518,12 @@ static struct max8998_regulator_data goni_regulators[] = { static struct max8998_platform_data goni_max8998_pdata = { .num_regulators = ARRAY_SIZE(goni_regulators), .regulators = goni_regulators, + .buck1_set1 = S5PV210_GPH0(3), + .buck1_set2 = S5PV210_GPH0(4), + .buck2_set3 = S5PV210_GPH0(5), + .buck1_max_voltage1 = 1200000, + .buck1_max_voltage2 = 1200000, + .buck2_max_voltage = 1200000, }; #endif -- cgit v0.10.2 From e692cb668fdd5a712c6ed2a2d6f2a36ee83997b4 Mon Sep 17 00:00:00 2001 From: "Martin K. Petersen" Date: Wed, 1 Dec 2010 19:41:49 +0100 Subject: block: Deprecate QUEUE_FLAG_CLUSTER and use queue_limits instead When stacking devices, a request_queue is not always available. This forced us to have a no_cluster flag in the queue_limits that could be used as a carrier until the request_queue had been set up for a metadevice. There were several problems with that approach. First of all it was up to the stacking device to remember to set queue flag after stacking had completed. Also, the queue flag and the queue limits had to be kept in sync at all times. We got that wrong, which could lead to us issuing commands that went beyond the max scatterlist limit set by the driver. The proper fix is to avoid having two flags for tracking the same thing. We deprecate QUEUE_FLAG_CLUSTER and use the queue limit directly in the block layer merging functions. The queue_limit 'no_cluster' is turned into 'cluster' to avoid double negatives and to ease stacking. Clustering defaults to being enabled as before. The queue flag logic is removed from the stacking function, and explicitly setting the cluster flag is no longer necessary in DM and MD. Reported-by: Ed Lin Signed-off-by: Martin K. Petersen Acked-by: Mike Snitzer Cc: stable@kernel.org Signed-off-by: Jens Axboe diff --git a/block/blk-merge.c b/block/blk-merge.c index 77b7c26..74bc4a7 100644 --- a/block/blk-merge.c +++ b/block/blk-merge.c @@ -21,7 +21,7 @@ static unsigned int __blk_recalc_rq_segments(struct request_queue *q, return 0; fbio = bio; - cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags); + cluster = blk_queue_cluster(q); seg_size = 0; nr_phys_segs = 0; for_each_bio(bio) { @@ -87,7 +87,7 @@ EXPORT_SYMBOL(blk_recount_segments); static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio, struct bio *nxt) { - if (!test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags)) + if (!blk_queue_cluster(q)) return 0; if (bio->bi_seg_back_size + nxt->bi_seg_front_size > @@ -123,7 +123,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq, int nsegs, cluster; nsegs = 0; - cluster = test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags); + cluster = blk_queue_cluster(q); /* * for each bio in rq diff --git a/block/blk-settings.c b/block/blk-settings.c index 701859f..e55f5fc 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -126,7 +126,7 @@ void blk_set_default_limits(struct queue_limits *lim) lim->alignment_offset = 0; lim->io_opt = 0; lim->misaligned = 0; - lim->no_cluster = 0; + lim->cluster = 1; } EXPORT_SYMBOL(blk_set_default_limits); @@ -464,15 +464,6 @@ EXPORT_SYMBOL(blk_queue_io_opt); void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b) { blk_stack_limits(&t->limits, &b->limits, 0); - - if (!t->queue_lock) - WARN_ON_ONCE(1); - else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) { - unsigned long flags; - spin_lock_irqsave(t->queue_lock, flags); - queue_flag_clear(QUEUE_FLAG_CLUSTER, t); - spin_unlock_irqrestore(t->queue_lock, flags); - } } EXPORT_SYMBOL(blk_queue_stack_limits); @@ -545,7 +536,7 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->io_min = max(t->io_min, b->io_min); t->io_opt = lcm(t->io_opt, b->io_opt); - t->no_cluster |= b->no_cluster; + t->cluster &= b->cluster; t->discard_zeroes_data &= b->discard_zeroes_data; /* Physical block size a multiple of the logical block size? */ @@ -641,7 +632,6 @@ void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, sector_t offset) { struct request_queue *t = disk->queue; - struct request_queue *b = bdev_get_queue(bdev); if (bdev_stack_limits(&t->limits, bdev, offset >> 9) < 0) { char top[BDEVNAME_SIZE], bottom[BDEVNAME_SIZE]; @@ -652,17 +642,6 @@ void disk_stack_limits(struct gendisk *disk, struct block_device *bdev, printk(KERN_NOTICE "%s: Warning: Device %s is misaligned\n", top, bottom); } - - if (!t->queue_lock) - WARN_ON_ONCE(1); - else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) { - unsigned long flags; - - spin_lock_irqsave(t->queue_lock, flags); - if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) - queue_flag_clear(QUEUE_FLAG_CLUSTER, t); - spin_unlock_irqrestore(t->queue_lock, flags); - } } EXPORT_SYMBOL(disk_stack_limits); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 013457f..41fb691 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -119,7 +119,7 @@ static ssize_t queue_max_integrity_segments_show(struct request_queue *q, char * static ssize_t queue_max_segment_size_show(struct request_queue *q, char *page) { - if (test_bit(QUEUE_FLAG_CLUSTER, &q->queue_flags)) + if (blk_queue_cluster(q)) return queue_var_show(queue_max_segment_size(q), (page)); return queue_var_show(PAGE_CACHE_SIZE, (page)); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 90267f8..e2da191 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -1131,11 +1131,6 @@ void dm_table_set_restrictions(struct dm_table *t, struct request_queue *q, */ q->limits = *limits; - if (limits->no_cluster) - queue_flag_clear_unlocked(QUEUE_FLAG_CLUSTER, q); - else - queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, q); - if (!dm_table_supports_discards(t)) queue_flag_clear_unlocked(QUEUE_FLAG_DISCARD, q); else diff --git a/drivers/md/md.c b/drivers/md/md.c index 84c46a1..52694d2 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -4296,9 +4296,6 @@ static int md_alloc(dev_t dev, char *name) goto abort; mddev->queue->queuedata = mddev; - /* Can be unlocked because the queue is new: no concurrency */ - queue_flag_set_unlocked(QUEUE_FLAG_CLUSTER, mddev->queue); - blk_queue_make_request(mddev->queue, md_make_request); disk = alloc_disk(1 << shift); diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index eafeeda..9d7ba07 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1642,9 +1642,8 @@ struct request_queue *__scsi_alloc_queue(struct Scsi_Host *shost, blk_queue_max_segment_size(q, dma_get_max_seg_size(dev)); - /* New queue, no concurrency on queue_flags */ if (!shost->use_clustering) - queue_flag_clear_unlocked(QUEUE_FLAG_CLUSTER, q); + q->limits.cluster = 0; /* * set a reasonable default alignment on word boundaries: the diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index aae86fd..95aeeeb 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -250,7 +250,7 @@ struct queue_limits { unsigned char misaligned; unsigned char discard_misaligned; - unsigned char no_cluster; + unsigned char cluster; signed char discard_zeroes_data; }; @@ -380,7 +380,6 @@ struct request_queue #endif }; -#define QUEUE_FLAG_CLUSTER 0 /* cluster several segments into 1 */ #define QUEUE_FLAG_QUEUED 1 /* uses generic tag queueing */ #define QUEUE_FLAG_STOPPED 2 /* queue is stopped */ #define QUEUE_FLAG_SYNCFULL 3 /* read queue has been filled */ @@ -403,7 +402,6 @@ struct request_queue #define QUEUE_FLAG_SECDISCARD 19 /* supports SECDISCARD */ #define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \ - (1 << QUEUE_FLAG_CLUSTER) | \ (1 << QUEUE_FLAG_STACKABLE) | \ (1 << QUEUE_FLAG_SAME_COMP) | \ (1 << QUEUE_FLAG_ADD_RANDOM)) @@ -510,6 +508,11 @@ static inline void queue_flag_clear(unsigned int flag, struct request_queue *q) #define rq_data_dir(rq) ((rq)->cmd_flags & 1) +static inline unsigned int blk_queue_cluster(struct request_queue *q) +{ + return q->limits.cluster; +} + /* * We regard a request as sync, if either a read or a sync write */ -- cgit v0.10.2 From 72d4cd9f38b5ed96b75df4c622be25e1c2648dd3 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Fri, 17 Dec 2010 08:34:20 +0100 Subject: block: max hardware sectors limit wrapper Implement blk_limits_max_hw_sectors() and make blk_queue_max_hw_sectors() a wrapper around it. DM needs this to avoid setting queue_limits' max_hw_sectors and max_sectors directly. dm_set_device_limits() now leverages blk_limits_max_hw_sectors() logic to establish the appropriate max_hw_sectors minimum (PAGE_SIZE). Fixes issue where DM was incorrectly setting max_sectors rather than max_hw_sectors (which caused dm_merge_bvec()'s max_hw_sectors check to be ineffective). Signed-off-by: Mike Snitzer Cc: stable@kernel.org Acked-by: Martin K. Petersen Signed-off-by: Jens Axboe diff --git a/block/blk-settings.c b/block/blk-settings.c index e55f5fc..36c8c1f 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -229,8 +229,8 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_mask) EXPORT_SYMBOL(blk_queue_bounce_limit); /** - * blk_queue_max_hw_sectors - set max sectors for a request for this queue - * @q: the request queue for the device + * blk_limits_max_hw_sectors - set hard and soft limit of max sectors for request + * @limits: the queue limits * @max_hw_sectors: max hardware sectors in the usual 512b unit * * Description: @@ -244,7 +244,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit); * per-device basis in /sys/block//queue/max_sectors_kb. * The soft limit can not exceed max_hw_sectors. **/ -void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_sectors) +void blk_limits_max_hw_sectors(struct queue_limits *limits, unsigned int max_hw_sectors) { if ((max_hw_sectors << 9) < PAGE_CACHE_SIZE) { max_hw_sectors = 1 << (PAGE_CACHE_SHIFT - 9); @@ -252,9 +252,23 @@ void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_secto __func__, max_hw_sectors); } - q->limits.max_hw_sectors = max_hw_sectors; - q->limits.max_sectors = min_t(unsigned int, max_hw_sectors, - BLK_DEF_MAX_SECTORS); + limits->max_hw_sectors = max_hw_sectors; + limits->max_sectors = min_t(unsigned int, max_hw_sectors, + BLK_DEF_MAX_SECTORS); +} +EXPORT_SYMBOL(blk_limits_max_hw_sectors); + +/** + * blk_queue_max_hw_sectors - set max sectors for a request for this queue + * @q: the request queue for the device + * @max_hw_sectors: max hardware sectors in the usual 512b unit + * + * Description: + * See description for blk_limits_max_hw_sectors(). + **/ +void blk_queue_max_hw_sectors(struct request_queue *q, unsigned int max_hw_sectors) +{ + blk_limits_max_hw_sectors(&q->limits, max_hw_sectors); } EXPORT_SYMBOL(blk_queue_max_hw_sectors); diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index e2da191..4d705ce 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -517,9 +517,8 @@ int dm_set_device_limits(struct dm_target *ti, struct dm_dev *dev, */ if (q->merge_bvec_fn && !ti->type->merge) - limits->max_sectors = - min_not_zero(limits->max_sectors, - (unsigned int) (PAGE_SIZE >> 9)); + blk_limits_max_hw_sectors(limits, + (unsigned int) (PAGE_SIZE >> 9)); return 0; } EXPORT_SYMBOL_GPL(dm_set_device_limits); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 95aeeeb..36ab42c 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -808,6 +808,7 @@ extern struct request_queue *blk_init_allocated_queue(struct request_queue *, extern void blk_cleanup_queue(struct request_queue *); extern void blk_queue_make_request(struct request_queue *, make_request_fn *); extern void blk_queue_bounce_limit(struct request_queue *, u64); +extern void blk_limits_max_hw_sectors(struct queue_limits *, unsigned int); extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); extern void blk_queue_max_segments(struct request_queue *, unsigned short); extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); -- cgit v0.10.2 From 0fc13c8995cd96f4123de400c71c223d80400ed9 Mon Sep 17 00:00:00 2001 From: "Stephen M. Cameron" Date: Fri, 17 Dec 2010 09:01:37 +0100 Subject: cciss: fix cciss_revalidate panic If you delete a logical drive, and then run BLKRRPART (e.g. via fdisk) on a logical drive which is "after" the deleted logical drive in the h->drv[] array, then cciss_revalidate panics because it will access the null pointer h->drv[x] when x hits the deleted drive. Signed-off-by: Stephen M. Cameron Cc: stable@kernel.org Signed-off-by: Jens Axboe diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index f291587..233e06c 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -2834,6 +2834,8 @@ static int cciss_revalidate(struct gendisk *disk) InquiryData_struct *inq_buff = NULL; for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { + if (!h->drv[logvol]) + continue if (memcmp(h->drv[logvol]->LunID, drv->LunID, sizeof(drv->LunID)) == 0) { FOUND = 1; -- cgit v0.10.2 From 65ada547d68dc075aa06df92fe325bff07cbc606 Mon Sep 17 00:00:00 2001 From: Takashi YOSHII Date: Fri, 17 Dec 2010 07:25:09 +0000 Subject: clocksource: sh_cmt: Remove nested spinlock fix There are control flow that sh_cmt_set_next() does double spin-lock. The callers sh_cmt_{start,stop}() already have lock. But another callers sh_cmt_clock_event_{start,next}() does not. Now sh_cmt_set_next() does not lock by itself. All the callers should hold spin-lock before calling it. [damm@opensource.se: use __sh_cmt_set_next() to simplify code] [damm@opensource.se: added stable, suitable for v2.6.35 + v2.6.36] Cc: stable@kernel.org Signed-off-by: Takashi YOSHII Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index d68d3aa..f975d24 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -283,16 +283,21 @@ static void sh_cmt_clock_event_program_verify(struct sh_cmt_priv *p, } while (delay); } -static void sh_cmt_set_next(struct sh_cmt_priv *p, unsigned long delta) +static void __sh_cmt_set_next(struct sh_cmt_priv *p, unsigned long delta) { - unsigned long flags; - if (delta > p->max_match_value) dev_warn(&p->pdev->dev, "delta out of range\n"); - spin_lock_irqsave(&p->lock, flags); p->next_match_value = delta; sh_cmt_clock_event_program_verify(p, 0); +} + +static void sh_cmt_set_next(struct sh_cmt_priv *p, unsigned long delta) +{ + unsigned long flags; + + spin_lock_irqsave(&p->lock, flags); + __sh_cmt_set_next(p, delta); spin_unlock_irqrestore(&p->lock, flags); } @@ -359,7 +364,7 @@ static int sh_cmt_start(struct sh_cmt_priv *p, unsigned long flag) /* setup timeout if no clockevent */ if ((flag == FLAG_CLOCKSOURCE) && (!(p->flags & FLAG_CLOCKEVENT))) - sh_cmt_set_next(p, p->max_match_value); + __sh_cmt_set_next(p, p->max_match_value); out: spin_unlock_irqrestore(&p->lock, flags); @@ -381,7 +386,7 @@ static void sh_cmt_stop(struct sh_cmt_priv *p, unsigned long flag) /* adjust the timeout to maximum if only clocksource left */ if ((flag == FLAG_CLOCKEVENT) && (p->flags & FLAG_CLOCKSOURCE)) - sh_cmt_set_next(p, p->max_match_value); + __sh_cmt_set_next(p, p->max_match_value); spin_unlock_irqrestore(&p->lock, flags); } -- cgit v0.10.2 From 676b14c36de5bea83f7666e5f5965188426b97a7 Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Wed, 15 Dec 2010 10:59:24 +0000 Subject: ARM: mach-shmobile: fix compile warning in mm/init.c Turn down the warning noise from the compiler, basically a SH-Mobile specific version of the patch located in the RMK patch tracker: 6484/1: "fix compile warning in mm/init.c", Without this patch the following warning triggers: CC arch/arm/kernel/sys_arm.o arch/arm/mm/init.c: In function 'mem_init': arch/arm/mm/init.c:606: warning: format '%08lx' expects type 'long unsigned int', but argument 12 has type 'unsigned int' CC arch/arm/kernel/traps.o Signed-off-by: Magnus Damm Signed-off-by: Paul Mundt diff --git a/arch/arm/mach-shmobile/include/mach/vmalloc.h b/arch/arm/mach-shmobile/include/mach/vmalloc.h index 4aecf6e..2b8fd8b 100644 --- a/arch/arm/mach-shmobile/include/mach/vmalloc.h +++ b/arch/arm/mach-shmobile/include/mach/vmalloc.h @@ -2,6 +2,6 @@ #define __ASM_MACH_VMALLOC_H /* Vmalloc at ... - 0xe5ffffff */ -#define VMALLOC_END 0xe6000000 +#define VMALLOC_END 0xe6000000UL #endif /* __ASM_MACH_VMALLOC_H */ -- cgit v0.10.2 From 1cf215a5b43950d1a304373037828158057ff9fc Mon Sep 17 00:00:00 2001 From: Magnus Damm Date: Fri, 17 Dec 2010 15:15:48 +0900 Subject: ARM: mach-shmobile: INTC interrupt priority level demux fix Fix interrupt priority level handling on SH-Mobile ARM. SH-Mobile ARM platforms using multiple interrupt priority levels need this patch to fix a potential dead lock that may occur if multiple interrupts with different levels are pending simultaneously. The default INTC configuration is to use the same priority level for all interrupts, so this issue does not trigger by default. It is however common for board code to override the interrupt priority for certain interrupt sources depending on the application. Without this fix such boards may lock up. In detail, this patch updates the INTC code in entry-macro.S to make sure that the INTLVLA register gets set as expected. To trigger this bug modify the board specific code to adjust the interrupt priority level for the ethernet chip. After changing the priority level simply use flood ping to drown the board with interrupts. This patch applies to INTCA-based processors such as sh7372, sh7377 and sh7372. GIC-based processors are not affected. Suitable for v2.6.37-rc and stable from v2.6.34 to v2.6.36. Cc: stable@kernel.org Signed-off-by: Magnus Damm Tested-by: Kuninori Morimoto Signed-off-by: Paul Mundt diff --git a/arch/arm/mach-shmobile/include/mach/entry-macro.S b/arch/arm/mach-shmobile/include/mach/entry-macro.S index a285d13..f428c4d 100644 --- a/arch/arm/mach-shmobile/include/mach/entry-macro.S +++ b/arch/arm/mach-shmobile/include/mach/entry-macro.S @@ -1,4 +1,5 @@ /* + * Copyright (C) 2010 Magnus Damm * Copyright (C) 2008 Renesas Solutions Corp. * * This program is free software; you can redistribute it and/or modify @@ -14,24 +15,45 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include #include +#define INTCA_BASE 0xe6980000 +#define INTFLGA_OFFS 0x00000018 /* accept pending interrupt */ +#define INTEVTA_OFFS 0x00000020 /* vector number of accepted interrupt */ +#define INTLVLA_OFFS 0x00000030 /* priority level of accepted interrupt */ +#define INTLVLB_OFFS 0x00000034 /* previous priority level */ + .macro disable_fiq .endm .macro get_irqnr_preamble, base, tmp - ldr \base, =INTFLGA + ldr \base, =INTCA_BASE .endm .macro arch_ret_to_user, tmp1, tmp2 .endm .macro get_irqnr_and_base, irqnr, irqstat, base, tmp - ldr \irqnr, [\base] + /* The single INTFLGA read access below results in the following: + * + * 1. INTLVLB is updated with old priority value from INTLVLA + * 2. Highest priority interrupt is accepted + * 3. INTLVLA is updated to contain priority of accepted interrupt + * 4. Accepted interrupt vector is stored in INTFLGA and INTEVTA + */ + ldr \irqnr, [\base, #INTFLGA_OFFS] + + /* Restore INTLVLA with the value saved in INTLVLB. + * This is required to support interrupt priorities properly. + */ + ldrb \tmp, [\base, #INTLVLB_OFFS] + strb \tmp, [\base, #INTLVLA_OFFS] + + /* Handle invalid vector number case */ cmp \irqnr, #0 beq 1000f - /* intevt to irq number */ + + /* Convert vector to irq number, same as the evt2irq() macro */ lsr \irqnr, \irqnr, #0x5 subs \irqnr, \irqnr, #16 -- cgit v0.10.2 From 8251544f9e28058e54c4f35b7cd13b0d191d7555 Mon Sep 17 00:00:00 2001 From: Ryan Mallon Date: Wed, 2 Jun 2010 12:55:36 +1200 Subject: at91: Fix uhpck clock rate in upll case The uhpck clock should be divided from the utmi clock, not its parent (main). This change is mostly cosmetic as the uhpck rate value is not used anywhere except for the debugfs clock output. Signed-off-by: Ryan Mallon Signed-off-by: Nicolas Ferre diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c index 7525cee..9113da6 100644 --- a/arch/arm/mach-at91/clock.c +++ b/arch/arm/mach-at91/clock.c @@ -658,7 +658,7 @@ static void __init at91_upll_usbfs_clock_init(unsigned long main_clock) /* Now set uhpck values */ uhpck.parent = &utmi_clk; uhpck.pmc_mask = AT91SAM926x_PMC_UHP; - uhpck.rate_hz = utmi_clk.parent->rate_hz; + uhpck.rate_hz = utmi_clk.rate_hz; uhpck.rate_hz /= 1 + ((at91_sys_read(AT91_PMC_USB) & AT91_PMC_OHCIUSBDIV) >> 8); } -- cgit v0.10.2 From c20b4dd31820a551d0fb60bf27b99345905c2eb6 Mon Sep 17 00:00:00 2001 From: Christian Glindkamp Date: Thu, 9 Dec 2010 11:15:59 +0100 Subject: at91: Refactor Stamp9G20 and PControl G20 board file As PControl G20 is a carrier board for the Stamp9G20 SoM, some code can be shared. Therefore board-stamp9g20.c is refactored to allow reusing the SoM initialization and board-pcontrol-g20.c is modified to use it. Signed-off-by: Christian Glindkamp Signed-off-by: Nicolas Ferre diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile index 62d686f..d13add7 100644 --- a/arch/arm/mach-at91/Makefile +++ b/arch/arm/mach-at91/Makefile @@ -65,7 +65,7 @@ obj-$(CONFIG_MACH_AT91SAM9G20EK) += board-sam9g20ek.o obj-$(CONFIG_MACH_CPU9G20) += board-cpu9krea.o obj-$(CONFIG_MACH_STAMP9G20) += board-stamp9g20.o obj-$(CONFIG_MACH_PORTUXG20) += board-stamp9g20.o -obj-$(CONFIG_MACH_PCONTROL_G20) += board-pcontrol-g20.o +obj-$(CONFIG_MACH_PCONTROL_G20) += board-pcontrol-g20.o board-stamp9g20.o # AT91SAM9260/AT91SAM9G20 board-specific support obj-$(CONFIG_MACH_SNAPPER_9260) += board-snapper9260.o diff --git a/arch/arm/mach-at91/board-pcontrol-g20.c b/arch/arm/mach-at91/board-pcontrol-g20.c index bba5a56..feb6578 100644 --- a/arch/arm/mach-at91/board-pcontrol-g20.c +++ b/arch/arm/mach-at91/board-pcontrol-g20.c @@ -31,6 +31,7 @@ #include #include +#include #include "sam9_smc.h" #include "generic.h" @@ -38,11 +39,7 @@ static void __init pcontrol_g20_map_io(void) { - /* Initialize processor: 18.432 MHz crystal */ - at91sam9260_initialize(18432000); - - /* DGBU on ttyS0. (Rx, Tx) only TTL -> JTAG connector X7 17,19 ) */ - at91_register_uart(0, 0, 0); + stamp9g20_map_io(); /* USART0 on ttyS1. (Rx, Tx, CTS, RTS) piggyback A2 */ at91_register_uart(AT91SAM9260_ID_US0, 1, ATMEL_UART_CTS @@ -54,9 +51,6 @@ static void __init pcontrol_g20_map_io(void) /* USART2 on ttyS3. (Rx, Tx) 9bit-Bus Multidrop-mode X4 */ at91_register_uart(AT91SAM9260_ID_US4, 3, 0); - - /* set serial console to ttyS0 (ie, DBGU) */ - at91_set_serial_console(0); } @@ -66,38 +60,6 @@ static void __init init_irq(void) } -/* - * NAND flash 512MiB 1,8V 8-bit, sector size 128 KiB - */ -static struct atmel_nand_data __initdata nand_data = { - .ale = 21, - .cle = 22, - .rdy_pin = AT91_PIN_PC13, - .enable_pin = AT91_PIN_PC14, -}; - -/* - * Bus timings; unit = 7.57ns - */ -static struct sam9_smc_config __initdata nand_smc_config = { - .ncs_read_setup = 0, - .nrd_setup = 2, - .ncs_write_setup = 0, - .nwe_setup = 2, - - .ncs_read_pulse = 4, - .nrd_pulse = 4, - .ncs_write_pulse = 4, - .nwe_pulse = 4, - - .read_cycle = 7, - .write_cycle = 7, - - .mode = AT91_SMC_READMODE | AT91_SMC_WRITEMODE - | AT91_SMC_EXNWMODE_DISABLE | AT91_SMC_DBW_8, - .tdf_cycles = 3, -}; - static struct sam9_smc_config __initdata pcontrol_smc_config[2] = { { .ncs_read_setup = 16, .nrd_setup = 18, @@ -138,14 +100,6 @@ static struct sam9_smc_config __initdata pcontrol_smc_config[2] = { { .tdf_cycles = 1, } }; -static void __init add_device_nand(void) -{ - /* configure chip-select 3 (NAND) */ - sam9_smc_configure(3, &nand_smc_config); - at91_add_device_nand(&nand_data); -} - - static void __init add_device_pcontrol(void) { /* configure chip-select 4 (IO compatible to 8051 X4 ) */ @@ -156,23 +110,6 @@ static void __init add_device_pcontrol(void) /* - * MCI (SD/MMC) - * det_pin, wp_pin and vcc_pin are not connected - */ -#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE) -static struct mci_platform_data __initdata mmc_data = { - .slot[0] = { - .bus_width = 4, - }, -}; -#else -static struct at91_mmc_data __initdata mmc_data = { - .wire4 = 1, -}; -#endif - - -/* * USB Host port */ static struct at91_usbh_data __initdata usbh_data = { @@ -265,42 +202,13 @@ static struct spi_board_info pcontrol_g20_spi_devices[] = { }; -/* - * Dallas 1-Wire DS2431 - */ -static struct w1_gpio_platform_data w1_gpio_pdata = { - .pin = AT91_PIN_PA29, - .is_open_drain = 1, -}; - -static struct platform_device w1_device = { - .name = "w1-gpio", - .id = -1, - .dev.platform_data = &w1_gpio_pdata, -}; - -static void add_wire1(void) -{ - at91_set_GPIO_periph(w1_gpio_pdata.pin, 1); - at91_set_multi_drive(w1_gpio_pdata.pin, 1); - platform_device_register(&w1_device); -} - - static void __init pcontrol_g20_board_init(void) { - at91_add_device_serial(); - add_device_nand(); -#if defined(CONFIG_MMC_ATMELMCI) || defined(CONFIG_MMC_ATMELMCI_MODULE) - at91_add_device_mci(0, &mmc_data); -#else - at91_add_device_mmc(0, &mmc_data); -#endif + stamp9g20_board_init(); at91_add_device_usbh(&usbh_data); at91_add_device_eth(&macb_data); at91_add_device_i2c(pcontrol_g20_i2c_devices, ARRAY_SIZE(pcontrol_g20_i2c_devices)); - add_wire1(); add_device_pcontrol(); at91_add_device_spi(pcontrol_g20_spi_devices, ARRAY_SIZE(pcontrol_g20_spi_devices)); diff --git a/arch/arm/mach-at91/board-stamp9g20.c b/arch/arm/mach-at91/board-stamp9g20.c index 5206eef..f8902b1 100644 --- a/arch/arm/mach-at91/board-stamp9g20.c +++ b/arch/arm/mach-at91/board-stamp9g20.c @@ -32,7 +32,7 @@ #include "generic.h" -static void __init portuxg20_map_io(void) +void __init stamp9g20_map_io(void) { /* Initialize processor: 18.432 MHz crystal */ at91sam9260_initialize(18432000); @@ -40,6 +40,24 @@ static void __init portuxg20_map_io(void) /* DGBU on ttyS0. (Rx & Tx only) */ at91_register_uart(0, 0, 0); + /* set serial console to ttyS0 (ie, DBGU) */ + at91_set_serial_console(0); +} + +static void __init stamp9g20evb_map_io(void) +{ + stamp9g20_map_io(); + + /* USART0 on ttyS1. (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI) */ + at91_register_uart(AT91SAM9260_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS + | ATMEL_UART_DTR | ATMEL_UART_DSR + | ATMEL_UART_DCD | ATMEL_UART_RI); +} + +static void __init portuxg20_map_io(void) +{ + stamp9g20_map_io(); + /* USART0 on ttyS1. (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI) */ at91_register_uart(AT91SAM9260_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS | ATMEL_UART_DTR | ATMEL_UART_DSR @@ -56,26 +74,6 @@ static void __init portuxg20_map_io(void) /* USART5 on ttyS6. (Rx, Tx only) */ at91_register_uart(AT91SAM9260_ID_US5, 6, 0); - - /* set serial console to ttyS0 (ie, DBGU) */ - at91_set_serial_console(0); -} - -static void __init stamp9g20_map_io(void) -{ - /* Initialize processor: 18.432 MHz crystal */ - at91sam9260_initialize(18432000); - - /* DGBU on ttyS0. (Rx & Tx only) */ - at91_register_uart(0, 0, 0); - - /* USART0 on ttyS1. (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI) */ - at91_register_uart(AT91SAM9260_ID_US0, 1, ATMEL_UART_CTS | ATMEL_UART_RTS - | ATMEL_UART_DTR | ATMEL_UART_DSR - | ATMEL_UART_DCD | ATMEL_UART_RI); - - /* set serial console to ttyS0 (ie, DBGU) */ - at91_set_serial_console(0); } static void __init init_irq(void) @@ -156,7 +154,7 @@ static struct at91_udc_data __initdata portuxg20_udc_data = { .pullup_pin = 0, /* pull-up driven by UDC */ }; -static struct at91_udc_data __initdata stamp9g20_udc_data = { +static struct at91_udc_data __initdata stamp9g20evb_udc_data = { .vbus_pin = AT91_PIN_PA22, .pullup_pin = 0, /* pull-up driven by UDC */ }; @@ -190,7 +188,7 @@ static struct gpio_led portuxg20_leds[] = { } }; -static struct gpio_led stamp9g20_leds[] = { +static struct gpio_led stamp9g20evb_leds[] = { { .name = "D8", .gpio = AT91_PIN_PB18, @@ -250,7 +248,7 @@ void add_w1(void) } -static void __init generic_board_init(void) +void __init stamp9g20_board_init(void) { /* Serial */ at91_add_device_serial(); @@ -262,34 +260,40 @@ static void __init generic_board_init(void) #else at91_add_device_mmc(0, &mmc_data); #endif - /* USB Host */ - at91_add_device_usbh(&usbh_data); - /* Ethernet */ - at91_add_device_eth(&macb_data); - /* I2C */ - at91_add_device_i2c(NULL, 0); /* W1 */ add_w1(); } static void __init portuxg20_board_init(void) { - generic_board_init(); - /* SPI */ - at91_add_device_spi(portuxg20_spi_devices, ARRAY_SIZE(portuxg20_spi_devices)); + stamp9g20_board_init(); + /* USB Host */ + at91_add_device_usbh(&usbh_data); /* USB Device */ at91_add_device_udc(&portuxg20_udc_data); + /* Ethernet */ + at91_add_device_eth(&macb_data); + /* I2C */ + at91_add_device_i2c(NULL, 0); + /* SPI */ + at91_add_device_spi(portuxg20_spi_devices, ARRAY_SIZE(portuxg20_spi_devices)); /* LEDs */ at91_gpio_leds(portuxg20_leds, ARRAY_SIZE(portuxg20_leds)); } -static void __init stamp9g20_board_init(void) +static void __init stamp9g20evb_board_init(void) { - generic_board_init(); + stamp9g20_board_init(); + /* USB Host */ + at91_add_device_usbh(&usbh_data); /* USB Device */ - at91_add_device_udc(&stamp9g20_udc_data); + at91_add_device_udc(&stamp9g20evb_udc_data); + /* Ethernet */ + at91_add_device_eth(&macb_data); + /* I2C */ + at91_add_device_i2c(NULL, 0); /* LEDs */ - at91_gpio_leds(stamp9g20_leds, ARRAY_SIZE(stamp9g20_leds)); + at91_gpio_leds(stamp9g20evb_leds, ARRAY_SIZE(stamp9g20evb_leds)); } MACHINE_START(PORTUXG20, "taskit PortuxG20") @@ -305,7 +309,7 @@ MACHINE_START(STAMP9G20, "taskit Stamp9G20") /* Maintainer: taskit GmbH */ .boot_params = AT91_SDRAM_BASE + 0x100, .timer = &at91sam926x_timer, - .map_io = stamp9g20_map_io, + .map_io = stamp9g20evb_map_io, .init_irq = init_irq, - .init_machine = stamp9g20_board_init, + .init_machine = stamp9g20evb_board_init, MACHINE_END diff --git a/arch/arm/mach-at91/include/mach/stamp9g20.h b/arch/arm/mach-at91/include/mach/stamp9g20.h new file mode 100644 index 0000000..6120f9c --- /dev/null +++ b/arch/arm/mach-at91/include/mach/stamp9g20.h @@ -0,0 +1,7 @@ +#ifndef __MACH_STAMP9G20_H +#define __MACH_STAMP9G20_H + +void stamp9g20_map_io(void); +void stamp9g20_board_init(void); + +#endif -- cgit v0.10.2 From 53e8c3239bcc7b89c76179fd33fb6faa3413c00d Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 17 Dec 2010 15:23:41 +0100 Subject: ALSA: hda - Fix conflict of Mic Boot controls Due to the recent change for multiple mics assignment, we need to handle the index of each Mic Boost control respectively. Otherwise the driver gets the control element conflicts, and gives the unsable state. Reference: kernel bug 25002 https://bugzilla.kernel.org/show_bug.cgi?id=25002 Reported-and-tested-by: Adam Williamson Signed-off-by: Takashi Iwai diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c index 8e7948f..427da45 100644 --- a/sound/pci/hda/patch_realtek.c +++ b/sound/pci/hda/patch_realtek.c @@ -10830,7 +10830,8 @@ static int alc_auto_add_mic_boost(struct hda_codec *codec) { struct alc_spec *spec = codec->spec; struct auto_pin_cfg *cfg = &spec->autocfg; - int i, err; + int i, err, type; + int type_idx = 0; hda_nid_t nid; for (i = 0; i < cfg->num_inputs; i++) { @@ -10839,9 +10840,15 @@ static int alc_auto_add_mic_boost(struct hda_codec *codec) nid = cfg->inputs[i].pin; if (get_wcaps(codec, nid) & AC_WCAP_IN_AMP) { char label[32]; + type = cfg->inputs[i].type; + if (i > 0 && type == cfg->inputs[i - 1].type) + type_idx++; + else + type_idx = 0; snprintf(label, sizeof(label), "%s Boost", hda_get_autocfg_input_label(codec, cfg, i)); - err = add_control(spec, ALC_CTL_WIDGET_VOL, label, 0, + err = add_control(spec, ALC_CTL_WIDGET_VOL, label, + type_idx, HDA_COMPOSE_AMP_VAL(nid, 3, 0, HDA_INPUT)); if (err < 0) return err; -- cgit v0.10.2 From 92cf765237e2787eb168096305c448caf25ac7f8 Mon Sep 17 00:00:00 2001 From: Sage Weil Date: Fri, 17 Dec 2010 09:53:41 -0800 Subject: ceph: fix null pointer dereference in ceph_init_dentry for nfs reexport The fh_to_dentry etc. methods use ceph_init_dentry(), which assumes that d_parent is defined. It isn't for those callers, so check! Signed-off-by: Sage Weil diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 158c700..d902948 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -40,7 +40,8 @@ int ceph_init_dentry(struct dentry *dentry) if (dentry->d_fsdata) return 0; - if (ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) + if (dentry->d_parent == NULL || /* nfs fh_to_dentry */ + ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) dentry->d_op = &ceph_dentry_ops; else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR) dentry->d_op = &ceph_snapdir_dentry_ops; -- cgit v0.10.2 From b6aa5901c7a2bd90d0b6b9866300d2648b2568f3 Mon Sep 17 00:00:00 2001 From: Henry C Chang Date: Wed, 15 Dec 2010 20:45:41 -0800 Subject: ceph: mark user pages dirty on direct-io reads For read operation, we have to set the argument _write_ of get_user_pages to 1 since we will write data to pages. Also, we need to SetPageDirty before releasing these pages. Signed-off-by: Henry C Chang Signed-off-by: Sage Weil diff --git a/fs/ceph/file.c b/fs/ceph/file.c index e860d8f..7d0e4a8 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -384,7 +384,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, if (file->f_flags & O_DIRECT) { num_pages = calc_pages_for((unsigned long)data, len); - pages = ceph_get_direct_page_vector(data, num_pages); + pages = ceph_get_direct_page_vector(data, num_pages, true); } else { num_pages = calc_pages_for(off, len); pages = ceph_alloc_page_vector(num_pages, GFP_NOFS); @@ -413,7 +413,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data, done: if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, true); else ceph_release_page_vector(pages, num_pages); dout("sync_read result %d\n", ret); @@ -522,7 +522,7 @@ more: return -ENOMEM; if (file->f_flags & O_DIRECT) { - pages = ceph_get_direct_page_vector(data, num_pages); + pages = ceph_get_direct_page_vector(data, num_pages, false); if (IS_ERR(pages)) { ret = PTR_ERR(pages); goto out; @@ -572,7 +572,7 @@ more: } if (file->f_flags & O_DIRECT) - ceph_put_page_vector(pages, num_pages); + ceph_put_page_vector(pages, num_pages, false); else if (file->f_flags & O_SYNC) ceph_release_page_vector(pages, num_pages); diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h index 9e76d35..72c72bf 100644 --- a/include/linux/ceph/libceph.h +++ b/include/linux/ceph/libceph.h @@ -227,8 +227,10 @@ extern int ceph_open_session(struct ceph_client *client); extern void ceph_release_page_vector(struct page **pages, int num_pages); extern struct page **ceph_get_direct_page_vector(const char __user *data, - int num_pages); -extern void ceph_put_page_vector(struct page **pages, int num_pages); + int num_pages, + bool write_page); +extern void ceph_put_page_vector(struct page **pages, int num_pages, + bool dirty); extern void ceph_release_page_vector(struct page **pages, int num_pages); extern struct page **ceph_alloc_page_vector(int num_pages, gfp_t flags); extern int ceph_copy_user_to_page_vector(struct page **pages, diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index ac34fee..01947a5 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -13,7 +13,7 @@ * build a vector of user pages */ struct page **ceph_get_direct_page_vector(const char __user *data, - int num_pages) + int num_pages, bool write_page) { struct page **pages; int rc; @@ -24,7 +24,7 @@ struct page **ceph_get_direct_page_vector(const char __user *data, down_read(¤t->mm->mmap_sem); rc = get_user_pages(current, current->mm, (unsigned long)data, - num_pages, 0, 0, pages, NULL); + num_pages, write_page, 0, pages, NULL); up_read(¤t->mm->mmap_sem); if (rc < 0) goto fail; @@ -36,12 +36,15 @@ fail: } EXPORT_SYMBOL(ceph_get_direct_page_vector); -void ceph_put_page_vector(struct page **pages, int num_pages) +void ceph_put_page_vector(struct page **pages, int num_pages, bool dirty) { int i; - for (i = 0; i < num_pages; i++) + for (i = 0; i < num_pages; i++) { + if (dirty) + set_page_dirty_lock(pages[i]); put_page(pages[i]); + } kfree(pages); } EXPORT_SYMBOL(ceph_put_page_vector); -- cgit v0.10.2 From 361cf40519a491f68b28ad90225e4611c4bf8e12 Mon Sep 17 00:00:00 2001 From: Henry C Chang Date: Fri, 17 Dec 2010 09:55:59 -0800 Subject: ceph: handle partial result from get_user_pages The get_user_pages() helper can return fewer than the requested pages. Error out in that case, and clean up the partial result. Signed-off-by: Henry C Chang Signed-off-by: Sage Weil diff --git a/net/ceph/pagevec.c b/net/ceph/pagevec.c index 01947a5..1a040e6 100644 --- a/net/ceph/pagevec.c +++ b/net/ceph/pagevec.c @@ -26,12 +26,12 @@ struct page **ceph_get_direct_page_vector(const char __user *data, rc = get_user_pages(current, current->mm, (unsigned long)data, num_pages, write_page, 0, pages, NULL); up_read(¤t->mm->mmap_sem); - if (rc < 0) + if (rc < num_pages) goto fail; return pages; fail: - kfree(pages); + ceph_put_page_vector(pages, rc > 0 ? rc : 0, false); return ERR_PTR(rc); } EXPORT_SYMBOL(ceph_get_direct_page_vector); -- cgit v0.10.2 From ac57cd5ee1935d1e60de86d75f13f377775f1c96 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:20 -0700 Subject: Revert "PCI: fix pci_bus_alloc_resource() hang, prefer positive decode" This reverts commit 82e3e767c21fef2b1b38868e20eb4e470a1e38e3. We're going back to considering bus resources in the order we found them (in _CRS order, when we're using _CRS), so we don't need to define any ordering. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 003170e..5624db8 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -64,57 +64,17 @@ void pci_bus_remove_resources(struct pci_bus *bus) } } -static bool pci_bus_resource_better(struct resource *res1, bool pos1, - struct resource *res2, bool pos2) -{ - /* If exactly one is positive decode, always prefer that one */ - if (pos1 != pos2) - return pos1 ? true : false; - - /* Prefer the one that contains the highest address */ - if (res1->end != res2->end) - return (res1->end > res2->end) ? true : false; - - /* Otherwise, prefer the one with highest "center of gravity" */ - if (res1->start != res2->start) - return (res1->start > res2->start) ? true : false; - - /* Otherwise, choose one arbitrarily (but consistently) */ - return (res1 > res2) ? true : false; -} - -static bool pci_bus_resource_positive(struct pci_bus *bus, struct resource *res) -{ - struct pci_bus_resource *bus_res; - - /* - * This relies on the fact that pci_bus.resource[] refers to P2P or - * CardBus bridge base/limit registers, which are always positively - * decoded. The pci_bus.resources list contains host bridge or - * subtractively decoded resources. - */ - list_for_each_entry(bus_res, &bus->resources, list) { - if (bus_res->res == res) - return (bus_res->flags & PCI_SUBTRACTIVE_DECODE) ? - false : true; - } - return true; -} - /* - * Find the next-best bus resource after the cursor "res". If the cursor is - * NULL, return the best resource. "Best" means that we prefer positive - * decode regions over subtractive decode, then those at higher addresses. + * Find the highest-address bus resource below the cursor "res". If the + * cursor is NULL, return the highest resource. */ static struct resource *pci_bus_find_resource_prev(struct pci_bus *bus, unsigned int type, struct resource *res) { - bool res_pos, r_pos, prev_pos = false; struct resource *r, *prev = NULL; int i; - res_pos = pci_bus_resource_positive(bus, res); pci_bus_for_each_resource(bus, r, i) { if (!r) continue; @@ -122,14 +82,26 @@ static struct resource *pci_bus_find_resource_prev(struct pci_bus *bus, if ((r->flags & IORESOURCE_TYPE_BITS) != type) continue; - r_pos = pci_bus_resource_positive(bus, r); - if (!res || pci_bus_resource_better(res, res_pos, r, r_pos)) { - if (!prev || pci_bus_resource_better(r, r_pos, - prev, prev_pos)) { - prev = r; - prev_pos = r_pos; - } + /* If this resource is at or past the cursor, skip it */ + if (res) { + if (r == res) + continue; + if (r->end > res->end) + continue; + if (r->end == res->end && r->start > res->start) + continue; } + + if (!prev) + prev = r; + + /* + * A small resource is higher than a large one that ends at + * the same address. + */ + if (r->end > prev->end || + (r->end == prev->end && r->start > prev->start)) + prev = r; } return prev; -- cgit v0.10.2 From 5e52f1c5e85fdc3831eeae8b546577e94a586f81 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:25 -0700 Subject: Revert "x86: allocate space within a region top-down" This reverts commit 1af3c2e45e7a641e774bbb84fa428f2f0bf2d9c9. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 21c6746..85268f8 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -769,7 +769,6 @@ void __init setup_arch(char **cmdline_p) x86_init.oem.arch_setup(); - resource_alloc_from_bottom = 0; iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; setup_memory_map(); parse_setup_data(); -- cgit v0.10.2 From d14125ecfee05473de46f06d992db109308c57a3 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:31 -0700 Subject: Revert "x86/PCI: allocate space from the end of a region, not the beginning" This reverts commit dc9887dc02e37bcf83f4e792aa14b07782ef54cf. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index c4bb261..8379c2c 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -65,21 +65,16 @@ pcibios_align_resource(void *data, const struct resource *res, resource_size_t size, resource_size_t align) { struct pci_dev *dev = data; - resource_size_t start = round_down(res->end - size + 1, align); + resource_size_t start = res->start; if (res->flags & IORESOURCE_IO) { - - /* - * If we're avoiding ISA aliases, the largest contiguous I/O - * port space is 256 bytes. Clearing bits 9 and 10 preserves - * all 256-byte and smaller alignments, so the result will - * still be correctly aligned. - */ - if (!skip_isa_ioresource_align(dev)) - start &= ~0x300; + if (skip_isa_ioresource_align(dev)) + return start; + if (start & 0x300) + start = (start + 0x3ff) & ~0x3ff; } else if (res->flags & IORESOURCE_MEM) { if (start < BIOS_END) - start = res->end; /* fail; no space */ + start = BIOS_END; } return start; } -- cgit v0.10.2 From 6db45b76eaa08133187f2cb44d496de7e9503aa8 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:36 -0700 Subject: Revert "PCI: allocate bus resources from the top down" This reverts commit b126b4703afa4010b161784a43650337676dd03b. We're going back to the old behavior of allocating from bus resources in _CRS order. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 5624db8..69546e9 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -64,49 +64,6 @@ void pci_bus_remove_resources(struct pci_bus *bus) } } -/* - * Find the highest-address bus resource below the cursor "res". If the - * cursor is NULL, return the highest resource. - */ -static struct resource *pci_bus_find_resource_prev(struct pci_bus *bus, - unsigned int type, - struct resource *res) -{ - struct resource *r, *prev = NULL; - int i; - - pci_bus_for_each_resource(bus, r, i) { - if (!r) - continue; - - if ((r->flags & IORESOURCE_TYPE_BITS) != type) - continue; - - /* If this resource is at or past the cursor, skip it */ - if (res) { - if (r == res) - continue; - if (r->end > res->end) - continue; - if (r->end == res->end && r->start > res->start) - continue; - } - - if (!prev) - prev = r; - - /* - * A small resource is higher than a large one that ends at - * the same address. - */ - if (r->end > prev->end || - (r->end == prev->end && r->start > prev->start)) - prev = r; - } - - return prev; -} - /** * pci_bus_alloc_resource - allocate a resource from a parent bus * @bus: PCI bus @@ -132,10 +89,9 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, resource_size_t), void *alignf_data) { - int ret = -ENOMEM; + int i, ret = -ENOMEM; struct resource *r; resource_size_t max = -1; - unsigned int type = res->flags & IORESOURCE_TYPE_BITS; type_mask |= IORESOURCE_IO | IORESOURCE_MEM; @@ -143,9 +99,10 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, if (!(res->flags & IORESOURCE_MEM_64)) max = PCIBIOS_MAX_MEM_32; - /* Look for space at highest addresses first */ - r = pci_bus_find_resource_prev(bus, type, NULL); - for ( ; r; r = pci_bus_find_resource_prev(bus, type, r)) { + pci_bus_for_each_resource(bus, r, i) { + if (!r) + continue; + /* type_mask must match */ if ((res->flags ^ r->flags) & type_mask) continue; -- cgit v0.10.2 From c0f5ac5426f7fd82b23dd5c6a1e633b290294a08 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:41 -0700 Subject: Revert "resources: support allocating space within a region from the top down" This reverts commit e7f8567db9a7f6b3151b0b275e245c1cef0d9c70. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index cdd2a6e..8b61c93 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2175,11 +2175,6 @@ and is between 256 and 4096 characters. It is defined in the file reset_devices [KNL] Force drivers to reset the underlying device during initialization. - resource_alloc_from_bottom - Allocate new resources from the beginning of available - space, not the end. If you need to use this, please - report a bug. - resume= [SWSUSP] Specify the partition device for software suspend diff --git a/include/linux/ioport.h b/include/linux/ioport.h index d377ea8..b227902 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -112,7 +112,6 @@ struct resource_list { /* PC/ISA/whatever - the normal PC address spaces: IO and memory */ extern struct resource ioport_resource; extern struct resource iomem_resource; -extern int resource_alloc_from_bottom; extern struct resource *request_resource_conflict(struct resource *root, struct resource *new); extern int request_resource(struct resource *root, struct resource *new); diff --git a/kernel/resource.c b/kernel/resource.c index 9fad33e..560659f 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -40,23 +40,6 @@ EXPORT_SYMBOL(iomem_resource); static DEFINE_RWLOCK(resource_lock); -/* - * By default, we allocate free space bottom-up. The architecture can request - * top-down by clearing this flag. The user can override the architecture's - * choice with the "resource_alloc_from_bottom" kernel boot option, but that - * should only be a debugging tool. - */ -int resource_alloc_from_bottom = 1; - -static __init int setup_alloc_from_bottom(char *s) -{ - printk(KERN_INFO - "resource: allocating from bottom-up; please report a bug\n"); - resource_alloc_from_bottom = 1; - return 0; -} -early_param("resource_alloc_from_bottom", setup_alloc_from_bottom); - static void *r_next(struct seq_file *m, void *v, loff_t *pos) { struct resource *p = v; @@ -397,74 +380,7 @@ static bool resource_contains(struct resource *res1, struct resource *res2) } /* - * Find the resource before "child" in the sibling list of "root" children. - */ -static struct resource *find_sibling_prev(struct resource *root, struct resource *child) -{ - struct resource *this; - - for (this = root->child; this; this = this->sibling) - if (this->sibling == child) - return this; - - return NULL; -} - -/* - * Find empty slot in the resource tree given range and alignment. - * This version allocates from the end of the root resource first. - */ -static int find_resource_from_top(struct resource *root, struct resource *new, - resource_size_t size, resource_size_t min, - resource_size_t max, resource_size_t align, - resource_size_t (*alignf)(void *, - const struct resource *, - resource_size_t, - resource_size_t), - void *alignf_data) -{ - struct resource *this; - struct resource tmp, avail, alloc; - - tmp.start = root->end; - tmp.end = root->end; - - this = find_sibling_prev(root, NULL); - for (;;) { - if (this) { - if (this->end < root->end) - tmp.start = this->end + 1; - } else - tmp.start = root->start; - - resource_clip(&tmp, min, max); - - /* Check for overflow after ALIGN() */ - avail = *new; - avail.start = ALIGN(tmp.start, align); - avail.end = tmp.end; - if (avail.start >= tmp.start) { - alloc.start = alignf(alignf_data, &avail, size, align); - alloc.end = alloc.start + size - 1; - if (resource_contains(&avail, &alloc)) { - new->start = alloc.start; - new->end = alloc.end; - return 0; - } - } - - if (!this || this->start == root->start) - break; - - tmp.end = this->start - 1; - this = find_sibling_prev(root, this); - } - return -EBUSY; -} - -/* * Find empty slot in the resource tree given range and alignment. - * This version allocates from the beginning of the root resource first. */ static int find_resource(struct resource *root, struct resource *new, resource_size_t size, resource_size_t min, @@ -480,15 +396,14 @@ static int find_resource(struct resource *root, struct resource *new, tmp.start = root->start; /* - * Skip past an allocated resource that starts at 0, since the - * assignment of this->start - 1 to tmp->end below would cause an - * underflow. + * Skip past an allocated resource that starts at 0, since the assignment + * of this->start - 1 to tmp->end below would cause an underflow. */ if (this && this->start == 0) { tmp.start = this->end + 1; this = this->sibling; } - for (;;) { + for(;;) { if (this) tmp.end = this->start - 1; else @@ -509,10 +424,8 @@ static int find_resource(struct resource *root, struct resource *new, return 0; } } - if (!this) break; - tmp.start = this->end + 1; this = this->sibling; } @@ -545,10 +458,7 @@ int allocate_resource(struct resource *root, struct resource *new, alignf = simple_align_resource; write_lock(&resource_lock); - if (resource_alloc_from_bottom) - err = find_resource(root, new, size, min, max, align, alignf, alignf_data); - else - err = find_resource_from_top(root, new, size, min, max, align, alignf, alignf_data); + err = find_resource(root, new, size, min, max, align, alignf, alignf_data); if (err >= 0 && __request_resource(root, new)) err = -EBUSY; write_unlock(&resource_lock); -- cgit v0.10.2 From fcb119183c73bf0781009713f303e28b1fb13d3e Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:46 -0700 Subject: resources: add arch hook for preventing allocation in reserved areas This adds arch_remove_reservations(), which an arch can implement if it needs to protect part of the address space from allocation. Sometimes that can be done by just putting a region in the resource tree, but there are cases where that doesn't work well. For example, x86 BIOS E820 reservations are not related to devices, so they may overlap part of, all of, or more than a device resource, so they may not end up at the correct spot in the resource tree. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/include/linux/ioport.h b/include/linux/ioport.h index b227902..e9bb22c 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -123,6 +123,7 @@ extern void reserve_region_with_split(struct resource *root, extern struct resource *insert_resource_conflict(struct resource *parent, struct resource *new); extern int insert_resource(struct resource *parent, struct resource *new); extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); +extern void arch_remove_reservations(struct resource *avail); extern int allocate_resource(struct resource *root, struct resource *new, resource_size_t size, resource_size_t min, resource_size_t max, resource_size_t align, diff --git a/kernel/resource.c b/kernel/resource.c index 560659f..798e2fa 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -357,6 +357,10 @@ int __weak page_is_ram(unsigned long pfn) return walk_system_ram_range(pfn, 1, NULL, __is_ram) == 1; } +void __weak arch_remove_reservations(struct resource *avail) +{ +} + static resource_size_t simple_align_resource(void *data, const struct resource *avail, resource_size_t size, @@ -394,6 +398,7 @@ static int find_resource(struct resource *root, struct resource *new, struct resource *this = root->child; struct resource tmp = *new, avail, alloc; + tmp.flags = new->flags; tmp.start = root->start; /* * Skip past an allocated resource that starts at 0, since the assignment @@ -410,6 +415,7 @@ static int find_resource(struct resource *root, struct resource *new, tmp.end = root->end; resource_clip(&tmp, min, max); + arch_remove_reservations(&tmp); /* Check for overflow after ALIGN() */ avail = *new; -- cgit v0.10.2 From 30919b0bf356a8ee0ef4f7d38ca8ad99b96820b2 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:51 -0700 Subject: x86: avoid low BIOS area when allocating address space This implements arch_remove_reservations() so allocate_resource() can avoid any arch-specific reserved areas. This currently just avoids the BIOS area (the first 1MB), but could be used for E820 reserved areas if that turns out to be necessary. We previously avoided this area in pcibios_align_resource(). This patch moves the test from that PCI-specific path to a generic path, so *all* resource allocations will avoid this area. Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile index 9e13763..1e99475 100644 --- a/arch/x86/kernel/Makefile +++ b/arch/x86/kernel/Makefile @@ -45,6 +45,7 @@ obj-y += pci-dma.o quirks.o i8237.o topology.o kdebugfs.o obj-y += alternative.o i8253.o pci-nommu.o hw_breakpoint.o obj-y += tsc.o io_delay.o rtc.o obj-y += pci-iommu_table.o +obj-y += resource.o obj-$(CONFIG_X86_TRAMPOLINE) += trampoline.o obj-y += process.o diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c new file mode 100644 index 0000000..407a900 --- /dev/null +++ b/arch/x86/kernel/resource.c @@ -0,0 +1,11 @@ +#include +#include + +void arch_remove_reservations(struct resource *avail) +{ + /* Trim out BIOS area (low 1MB) */ + if (avail->flags & IORESOURCE_MEM) { + if (avail->start < BIOS_END) + avail->start = BIOS_END; + } +} diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 8379c2c..b1805b7 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -72,9 +72,6 @@ pcibios_align_resource(void *data, const struct resource *res, return start; if (start & 0x300) start = (start + 0x3ff) & ~0x3ff; - } else if (res->flags & IORESOURCE_MEM) { - if (start < BIOS_END) - start = BIOS_END; } return start; } -- cgit v0.10.2 From 4dc2287c1805e7fe8a7cb90bbcd44abee8cdb914 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:38:56 -0700 Subject: x86: avoid E820 regions when allocating address space When we allocate address space, e.g., to assign it to a PCI device, don't allocate anything mentioned in the BIOS E820 memory map. On recent machines (2008 and newer), we assign PCI resources from the windows described by the ACPI PCI host bridge _CRS. On many Dell machines, these windows overlap some E820 reserved areas, e.g., BIOS-e820: 00000000bfe4dc00 - 00000000c0000000 (reserved) pci_root PNP0A03:00: host bridge window [mem 0xbff00000-0xdfffffff] If we put devices at 0xbff00000, they don't work, probably because that's really RAM, not I/O memory. This patch prevents that by removing the 0xbfe4dc00-0xbfffffff area from the "available" resource. I'm not very happy with this solution because Windows solves the problem differently (it seems to ignore E820 reserved areas and it allocates top-down instead of bottom-up; details at comment 45 of the bugzilla below). That means we're vulnerable to BIOS defects that Windows would not trip over. For example, if BIOS described a device in ACPI but didn't mention it in E820, Windows would work fine but Linux would fail. Reference: https://bugzilla.kernel.org/show_bug.cgi?id=16228 Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c index 407a900..89638af 100644 --- a/arch/x86/kernel/resource.c +++ b/arch/x86/kernel/resource.c @@ -1,11 +1,47 @@ #include #include +static void resource_clip(struct resource *res, resource_size_t start, + resource_size_t end) +{ + resource_size_t low = 0, high = 0; + + if (res->end < start || res->start > end) + return; /* no conflict */ + + if (res->start < start) + low = start - res->start; + + if (res->end > end) + high = res->end - end; + + /* Keep the area above or below the conflict, whichever is larger */ + if (low > high) + res->end = start - 1; + else + res->start = end + 1; +} + +static void remove_e820_regions(struct resource *avail) +{ + int i; + struct e820entry *entry; + + for (i = 0; i < e820.nr_map; i++) { + entry = &e820.map[i]; + + resource_clip(avail, entry->addr, + entry->addr + entry->size - 1); + } +} + void arch_remove_reservations(struct resource *avail) { - /* Trim out BIOS area (low 1MB) */ + /* Trim out BIOS area (low 1MB) and E820 regions */ if (avail->flags & IORESOURCE_MEM) { if (avail->start < BIOS_END) avail->start = BIOS_END; + + remove_e820_regions(avail); } } -- cgit v0.10.2 From a2c606d53ab71dee6410f10ef0adf67321d60e06 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Thu, 16 Dec 2010 10:39:02 -0700 Subject: x86: avoid high BIOS area when allocating address space This prevents allocation of the last 2MB before 4GB. The experiment described here shows Windows 7 ignoring the last 1MB: https://bugzilla.kernel.org/show_bug.cgi?id=23542#c27 This patch ignores the top 2MB instead of just 1MB because H. Peter Anvin says "There will be ROM at the top of the 32-bit address space; it's a fact of the architecture, and on at least older systems it was common to have a shadow 1 MiB below." Acked-by: H. Peter Anvin Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes diff --git a/arch/x86/include/asm/e820.h b/arch/x86/include/asm/e820.h index 5be1542..e99d55d 100644 --- a/arch/x86/include/asm/e820.h +++ b/arch/x86/include/asm/e820.h @@ -72,6 +72,9 @@ struct e820map { #define BIOS_BEGIN 0x000a0000 #define BIOS_END 0x00100000 +#define BIOS_ROM_BASE 0xffe00000 +#define BIOS_ROM_END 0xffffffff + #ifdef __KERNEL__ /* see comment in arch/x86/kernel/e820.c */ extern struct e820map e820; diff --git a/arch/x86/kernel/resource.c b/arch/x86/kernel/resource.c index 89638af..2a26819 100644 --- a/arch/x86/kernel/resource.c +++ b/arch/x86/kernel/resource.c @@ -37,10 +37,11 @@ static void remove_e820_regions(struct resource *avail) void arch_remove_reservations(struct resource *avail) { - /* Trim out BIOS area (low 1MB) and E820 regions */ + /* Trim out BIOS areas (low 1MB and high 2MB) and E820 regions */ if (avail->flags & IORESOURCE_MEM) { if (avail->start < BIOS_END) avail->start = BIOS_END; + resource_clip(avail, BIOS_ROM_BASE, BIOS_ROM_END); remove_e820_regions(avail); } -- cgit v0.10.2 From 081d835fa4ce70ad1e42ac76de850a49e23a1557 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Tue, 2 Nov 2010 22:28:01 -0700 Subject: MIPS: Fix build errors in sc-mips.c Seen with malta_defconfig on Linus' tree: CC arch/mips/mm/sc-mips.o arch/mips/mm/sc-mips.c: In function 'mips_sc_is_activated': arch/mips/mm/sc-mips.c:77: error: 'config2' undeclared (first use in this function) arch/mips/mm/sc-mips.c:77: error: (Each undeclared identifier is reported only once arch/mips/mm/sc-mips.c:77: error: for each function it appears in.) arch/mips/mm/sc-mips.c:81: error: 'tmp' undeclared (first use in this function) make[2]: *** [arch/mips/mm/sc-mips.o] Error 1 make[1]: *** [arch/mips/mm] Error 2 make: *** [arch/mips] Error 2 [Ralf: Cosmetic changes to minimize the number of arguments passed to mips_sc_is_activated] Signed-off-by: Kevin Cernekee Patchwork: https://patchwork.linux-mips.org/patch/1752/ Signed-off-by: Ralf Baechle diff --git a/arch/mips/mm/sc-mips.c b/arch/mips/mm/sc-mips.c index 505feca..9cca8de 100644 --- a/arch/mips/mm/sc-mips.c +++ b/arch/mips/mm/sc-mips.c @@ -68,6 +68,9 @@ static struct bcache_ops mips_sc_ops = { */ static inline int mips_sc_is_activated(struct cpuinfo_mips *c) { + unsigned int config2 = read_c0_config2(); + unsigned int tmp; + /* Check the bypass bit (L2B) */ switch (c->cputype) { case CPU_34K: @@ -83,6 +86,7 @@ static inline int mips_sc_is_activated(struct cpuinfo_mips *c) c->scache.linesz = 2 << tmp; else return 0; + return 1; } static inline int __init mips_sc_probe(void) -- cgit v0.10.2 From 587f0d5d6d44e3529028bf197d424f866fb2411d Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Wed, 15 Dec 2010 18:45:42 -0300 Subject: [media] bttv: fix mutex use before init (BZ#24602) Fix a regression where bttv driver causes oopses when loading, since it were using some non-initialized mutexes. While it would be possible to fix the issue, there are some other lock troubles, like to the presence of lock code at free_btres_lock(). It is possible to fix, but the better is to just use the core-assisted locking schema. This way, V4L2 core will serialize access to all ioctl's/open/close/mmap/read/poll operations, avoiding to have two processes accessing the hardware at the same time. Also, as there's just one lock, instead of 3, there's no risk of dead locks. The net result is a cleaner code, with just one lock. Reported-by: Dan Carpenter Reported-by: Brandon Philips Reported-by: Chris Clayton Reported-by: Torsten Kaiser Tested-by: Chris Clayton Tested-by: Torsten Kaiser Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c index 3da6e80..c14b819 100644 --- a/drivers/media/video/bt8xx/bttv-driver.c +++ b/drivers/media/video/bt8xx/bttv-driver.c @@ -855,7 +855,6 @@ int check_alloc_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bit) xbits |= RESOURCE_VIDEO_READ | RESOURCE_VIDEO_STREAM; /* is it free? */ - mutex_lock(&btv->lock); if (btv->resources & xbits) { /* no, someone else uses it */ goto fail; @@ -885,11 +884,9 @@ int check_alloc_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bit) /* it's free, grab it */ fh->resources |= bit; btv->resources |= bit; - mutex_unlock(&btv->lock); return 1; fail: - mutex_unlock(&btv->lock); return 0; } @@ -941,7 +938,6 @@ void free_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bits) /* trying to free ressources not allocated by us ... */ printk("bttv: BUG! (btres)\n"); } - mutex_lock(&btv->lock); fh->resources &= ~bits; btv->resources &= ~bits; @@ -952,8 +948,6 @@ void free_btres_lock(struct bttv *btv, struct bttv_fh *fh, int bits) if (0 == (bits & VBI_RESOURCES)) disclaim_vbi_lines(btv); - - mutex_unlock(&btv->lock); } /* ----------------------------------------------------------------------- */ @@ -1714,28 +1708,20 @@ static int bttv_prepare_buffer(struct videobuf_queue *q,struct bttv *btv, /* Make sure tvnorm and vbi_end remain consistent until we're done. */ - mutex_lock(&btv->lock); norm = btv->tvnorm; /* In this mode capturing always starts at defrect.top (default VDELAY), ignoring cropping parameters. */ if (btv->vbi_end > bttv_tvnorms[norm].cropcap.defrect.top) { - mutex_unlock(&btv->lock); return -EINVAL; } - mutex_unlock(&btv->lock); - c.rect = bttv_tvnorms[norm].cropcap.defrect; } else { - mutex_lock(&btv->lock); - norm = btv->tvnorm; c = btv->crop[!!fh->do_crop]; - mutex_unlock(&btv->lock); - if (width < c.min_scaled_width || width > c.max_scaled_width || height < c.min_scaled_height) @@ -1859,7 +1845,6 @@ static int bttv_s_std(struct file *file, void *priv, v4l2_std_id *id) unsigned int i; int err; - mutex_lock(&btv->lock); err = v4l2_prio_check(&btv->prio, fh->prio); if (err) goto err; @@ -1875,7 +1860,6 @@ static int bttv_s_std(struct file *file, void *priv, v4l2_std_id *id) set_tvnorm(btv, i); err: - mutex_unlock(&btv->lock); return err; } @@ -1899,7 +1883,6 @@ static int bttv_enum_input(struct file *file, void *priv, struct bttv *btv = fh->btv; int rc = 0; - mutex_lock(&btv->lock); if (i->index >= bttv_tvcards[btv->c.type].video_inputs) { rc = -EINVAL; goto err; @@ -1929,7 +1912,6 @@ static int bttv_enum_input(struct file *file, void *priv, i->std = BTTV_NORMS; err: - mutex_unlock(&btv->lock); return rc; } @@ -1939,9 +1921,7 @@ static int bttv_g_input(struct file *file, void *priv, unsigned int *i) struct bttv_fh *fh = priv; struct bttv *btv = fh->btv; - mutex_lock(&btv->lock); *i = btv->input; - mutex_unlock(&btv->lock); return 0; } @@ -1953,7 +1933,6 @@ static int bttv_s_input(struct file *file, void *priv, unsigned int i) int err; - mutex_lock(&btv->lock); err = v4l2_prio_check(&btv->prio, fh->prio); if (unlikely(err)) goto err; @@ -1966,7 +1945,6 @@ static int bttv_s_input(struct file *file, void *priv, unsigned int i) set_input(btv, i, btv->tvnorm); err: - mutex_unlock(&btv->lock); return 0; } @@ -1980,7 +1958,6 @@ static int bttv_s_tuner(struct file *file, void *priv, if (unlikely(0 != t->index)) return -EINVAL; - mutex_lock(&btv->lock); if (unlikely(btv->tuner_type == TUNER_ABSENT)) { err = -EINVAL; goto err; @@ -1996,7 +1973,6 @@ static int bttv_s_tuner(struct file *file, void *priv, btv->audio_mode_gpio(btv, t, 1); err: - mutex_unlock(&btv->lock); return 0; } @@ -2007,10 +1983,8 @@ static int bttv_g_frequency(struct file *file, void *priv, struct bttv_fh *fh = priv; struct bttv *btv = fh->btv; - mutex_lock(&btv->lock); f->type = btv->radio_user ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; f->frequency = btv->freq; - mutex_unlock(&btv->lock); return 0; } @@ -2025,7 +1999,6 @@ static int bttv_s_frequency(struct file *file, void *priv, if (unlikely(f->tuner != 0)) return -EINVAL; - mutex_lock(&btv->lock); err = v4l2_prio_check(&btv->prio, fh->prio); if (unlikely(err)) goto err; @@ -2040,7 +2013,6 @@ static int bttv_s_frequency(struct file *file, void *priv, if (btv->has_matchbox && btv->radio_user) tea5757_set_freq(btv, btv->freq); err: - mutex_unlock(&btv->lock); return 0; } @@ -2173,7 +2145,6 @@ limit_scaled_size_lock (struct bttv_fh * fh, /* Make sure tvnorm, vbi_end and the current cropping parameters remain consistent until we're done. */ - mutex_lock(&btv->lock); b = &bttv_tvnorms[btv->tvnorm].cropcap.bounds; @@ -2251,7 +2222,6 @@ limit_scaled_size_lock (struct bttv_fh * fh, rc = 0; /* success */ fail: - mutex_unlock(&btv->lock); return rc; } @@ -2283,9 +2253,7 @@ verify_window_lock (struct bttv_fh * fh, if (V4L2_FIELD_ANY == field) { __s32 height2; - mutex_lock(&fh->btv->lock); height2 = fh->btv->crop[!!fh->do_crop].rect.height >> 1; - mutex_unlock(&fh->btv->lock); field = (win->w.height > height2) ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP; @@ -2361,7 +2329,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv, } } - mutex_lock(&fh->cap.vb_lock); /* clip against screen */ if (NULL != btv->fbuf.base) n = btcx_screen_clips(btv->fbuf.fmt.width, btv->fbuf.fmt.height, @@ -2413,7 +2380,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv, bttv_overlay_risc(btv, &fh->ov, fh->ovfmt, new); retval = bttv_switch_overlay(btv,fh,new); } - mutex_unlock(&fh->cap.vb_lock); return retval; } @@ -2527,9 +2493,7 @@ static int bttv_try_fmt_vid_cap(struct file *file, void *priv, if (V4L2_FIELD_ANY == field) { __s32 height2; - mutex_lock(&btv->lock); height2 = btv->crop[!!fh->do_crop].rect.height >> 1; - mutex_unlock(&btv->lock); field = (f->fmt.pix.height > height2) ? V4L2_FIELD_INTERLACED : V4L2_FIELD_BOTTOM; @@ -2615,7 +2579,6 @@ static int bttv_s_fmt_vid_cap(struct file *file, void *priv, fmt = format_by_fourcc(f->fmt.pix.pixelformat); /* update our state informations */ - mutex_lock(&fh->cap.vb_lock); fh->fmt = fmt; fh->cap.field = f->fmt.pix.field; fh->cap.last = V4L2_FIELD_NONE; @@ -2624,7 +2587,6 @@ static int bttv_s_fmt_vid_cap(struct file *file, void *priv, btv->init.fmt = fmt; btv->init.width = f->fmt.pix.width; btv->init.height = f->fmt.pix.height; - mutex_unlock(&fh->cap.vb_lock); return 0; } @@ -2650,11 +2612,9 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) unsigned int i; struct bttv_fh *fh = priv; - mutex_lock(&fh->cap.vb_lock); retval = __videobuf_mmap_setup(&fh->cap, gbuffers, gbufsize, V4L2_MEMORY_MMAP); if (retval < 0) { - mutex_unlock(&fh->cap.vb_lock); return retval; } @@ -2666,7 +2626,6 @@ static int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf) for (i = 0; i < gbuffers; i++) mbuf->offsets[i] = i * gbufsize; - mutex_unlock(&fh->cap.vb_lock); return 0; } #endif @@ -2776,10 +2735,8 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on) int retval = 0; if (on) { - mutex_lock(&fh->cap.vb_lock); /* verify args */ if (unlikely(!btv->fbuf.base)) { - mutex_unlock(&fh->cap.vb_lock); return -EINVAL; } if (unlikely(!fh->ov.setup_ok)) { @@ -2788,13 +2745,11 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on) } if (retval) return retval; - mutex_unlock(&fh->cap.vb_lock); } if (!check_alloc_btres_lock(btv, fh, RESOURCE_OVERLAY)) return -EBUSY; - mutex_lock(&fh->cap.vb_lock); if (on) { fh->ov.tvnorm = btv->tvnorm; new = videobuf_sg_alloc(sizeof(*new)); @@ -2806,7 +2761,6 @@ static int bttv_overlay(struct file *file, void *f, unsigned int on) /* switch over */ retval = bttv_switch_overlay(btv, fh, new); - mutex_unlock(&fh->cap.vb_lock); return retval; } @@ -2845,7 +2799,6 @@ static int bttv_s_fbuf(struct file *file, void *f, } /* ok, accept it */ - mutex_lock(&fh->cap.vb_lock); btv->fbuf.base = fb->base; btv->fbuf.fmt.width = fb->fmt.width; btv->fbuf.fmt.height = fb->fmt.height; @@ -2877,7 +2830,6 @@ static int bttv_s_fbuf(struct file *file, void *f, retval = bttv_switch_overlay(btv, fh, new); } } - mutex_unlock(&fh->cap.vb_lock); return retval; } @@ -2956,7 +2908,6 @@ static int bttv_queryctrl(struct file *file, void *priv, c->id >= V4L2_CID_PRIVATE_LASTP1)) return -EINVAL; - mutex_lock(&btv->lock); if (!btv->volume_gpio && (c->id == V4L2_CID_AUDIO_VOLUME)) *c = no_ctl; else { @@ -2964,7 +2915,6 @@ static int bttv_queryctrl(struct file *file, void *priv, *c = (NULL != ctrl) ? *ctrl : no_ctl; } - mutex_unlock(&btv->lock); return 0; } @@ -2975,10 +2925,8 @@ static int bttv_g_parm(struct file *file, void *f, struct bttv_fh *fh = f; struct bttv *btv = fh->btv; - mutex_lock(&btv->lock); v4l2_video_std_frame_period(bttv_tvnorms[btv->tvnorm].v4l2_id, &parm->parm.capture.timeperframe); - mutex_unlock(&btv->lock); return 0; } @@ -2994,7 +2942,6 @@ static int bttv_g_tuner(struct file *file, void *priv, if (0 != t->index) return -EINVAL; - mutex_lock(&btv->lock); t->rxsubchans = V4L2_TUNER_SUB_MONO; bttv_call_all(btv, tuner, g_tuner, t); strcpy(t->name, "Television"); @@ -3006,7 +2953,6 @@ static int bttv_g_tuner(struct file *file, void *priv, if (btv->audio_mode_gpio) btv->audio_mode_gpio(btv, t, 0); - mutex_unlock(&btv->lock); return 0; } @@ -3015,9 +2961,7 @@ static int bttv_g_priority(struct file *file, void *f, enum v4l2_priority *p) struct bttv_fh *fh = f; struct bttv *btv = fh->btv; - mutex_lock(&btv->lock); *p = v4l2_prio_max(&btv->prio); - mutex_unlock(&btv->lock); return 0; } @@ -3029,9 +2973,7 @@ static int bttv_s_priority(struct file *file, void *f, struct bttv *btv = fh->btv; int rc; - mutex_lock(&btv->lock); rc = v4l2_prio_change(&btv->prio, &fh->prio, prio); - mutex_unlock(&btv->lock); return rc; } @@ -3046,9 +2988,7 @@ static int bttv_cropcap(struct file *file, void *priv, cap->type != V4L2_BUF_TYPE_VIDEO_OVERLAY) return -EINVAL; - mutex_lock(&btv->lock); *cap = bttv_tvnorms[btv->tvnorm].cropcap; - mutex_unlock(&btv->lock); return 0; } @@ -3066,9 +3006,7 @@ static int bttv_g_crop(struct file *file, void *f, struct v4l2_crop *crop) inconsistent with fh->width or fh->height and apps do not expect a change here. */ - mutex_lock(&btv->lock); crop->c = btv->crop[!!fh->do_crop].rect; - mutex_unlock(&btv->lock); return 0; } @@ -3092,17 +3030,14 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop) /* Make sure tvnorm, vbi_end and the current cropping parameters remain consistent until we're done. Note read() may change vbi_end in check_alloc_btres_lock(). */ - mutex_lock(&btv->lock); retval = v4l2_prio_check(&btv->prio, fh->prio); if (0 != retval) { - mutex_unlock(&btv->lock); return retval; } retval = -EBUSY; if (locked_btres(fh->btv, VIDEO_RESOURCES)) { - mutex_unlock(&btv->lock); return retval; } @@ -3114,7 +3049,6 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop) b_top = max(b->top, btv->vbi_end); if (b_top + 32 >= b_bottom) { - mutex_unlock(&btv->lock); return retval; } @@ -3137,12 +3071,8 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop) btv->crop[1] = c; - mutex_unlock(&btv->lock); - fh->do_crop = 1; - mutex_lock(&fh->cap.vb_lock); - if (fh->width < c.min_scaled_width) { fh->width = c.min_scaled_width; btv->init.width = c.min_scaled_width; @@ -3159,8 +3089,6 @@ static int bttv_s_crop(struct file *file, void *f, struct v4l2_crop *crop) btv->init.height = c.max_scaled_height; } - mutex_unlock(&fh->cap.vb_lock); - return 0; } @@ -3228,7 +3156,6 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait) return videobuf_poll_stream(file, &fh->vbi, wait); } - mutex_lock(&fh->cap.vb_lock); if (check_btres(fh,RESOURCE_VIDEO_STREAM)) { /* streaming capture */ if (list_empty(&fh->cap.stream)) @@ -3263,7 +3190,6 @@ static unsigned int bttv_poll(struct file *file, poll_table *wait) else rc = 0; err: - mutex_unlock(&fh->cap.vb_lock); return rc; } @@ -3303,14 +3229,11 @@ static int bttv_open(struct file *file) * Let's first copy btv->init at fh, holding cap.vb_lock, and then work * with the rest of init, holding btv->lock. */ - mutex_lock(&fh->cap.vb_lock); *fh = btv->init; - mutex_unlock(&fh->cap.vb_lock); fh->type = type; fh->ov.setup_ok = 0; - mutex_lock(&btv->lock); v4l2_prio_open(&btv->prio, &fh->prio); videobuf_queue_sg_init(&fh->cap, &bttv_video_qops, @@ -3318,13 +3241,13 @@ static int bttv_open(struct file *file) V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_FIELD_INTERLACED, sizeof(struct bttv_buffer), - fh, NULL); + fh, &btv->lock); videobuf_queue_sg_init(&fh->vbi, &bttv_vbi_qops, &btv->c.pci->dev, &btv->s_lock, V4L2_BUF_TYPE_VBI_CAPTURE, V4L2_FIELD_SEQ_TB, sizeof(struct bttv_buffer), - fh, NULL); + fh, &btv->lock); set_tvnorm(btv,btv->tvnorm); set_input(btv, btv->input, btv->tvnorm); @@ -3347,7 +3270,6 @@ static int bttv_open(struct file *file) bttv_vbi_fmt_reset(&fh->vbi_fmt, btv->tvnorm); bttv_field_count(btv); - mutex_unlock(&btv->lock); return 0; } @@ -3356,7 +3278,6 @@ static int bttv_release(struct file *file) struct bttv_fh *fh = file->private_data; struct bttv *btv = fh->btv; - mutex_lock(&btv->lock); /* turn off overlay */ if (check_btres(fh, RESOURCE_OVERLAY)) bttv_switch_overlay(btv,fh,NULL); @@ -3386,10 +3307,8 @@ static int bttv_release(struct file *file) * videobuf uses cap.vb_lock - we should avoid holding btv->lock, * otherwise we may have dead lock conditions */ - mutex_unlock(&btv->lock); videobuf_mmap_free(&fh->cap); videobuf_mmap_free(&fh->vbi); - mutex_lock(&btv->lock); v4l2_prio_close(&btv->prio, fh->prio); file->private_data = NULL; kfree(fh); @@ -3399,7 +3318,6 @@ static int bttv_release(struct file *file) if (!btv->users) audio_mute(btv, 1); - mutex_unlock(&btv->lock); return 0; } @@ -3503,11 +3421,8 @@ static int radio_open(struct file *file) if (unlikely(!fh)) return -ENOMEM; file->private_data = fh; - mutex_lock(&fh->cap.vb_lock); *fh = btv->init; - mutex_unlock(&fh->cap.vb_lock); - mutex_lock(&btv->lock); v4l2_prio_open(&btv->prio, &fh->prio); btv->radio_user++; @@ -3515,7 +3430,6 @@ static int radio_open(struct file *file) bttv_call_all(btv, tuner, s_radio); audio_input(btv,TVAUDIO_INPUT_RADIO); - mutex_unlock(&btv->lock); return 0; } @@ -3525,7 +3439,6 @@ static int radio_release(struct file *file) struct bttv *btv = fh->btv; struct rds_command cmd; - mutex_lock(&btv->lock); v4l2_prio_close(&btv->prio, fh->prio); file->private_data = NULL; kfree(fh); @@ -3533,7 +3446,6 @@ static int radio_release(struct file *file) btv->radio_user--; bttv_call_all(btv, core, ioctl, RDS_CMD_CLOSE, &cmd); - mutex_unlock(&btv->lock); return 0; } @@ -3562,7 +3474,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t) return -EINVAL; if (0 != t->index) return -EINVAL; - mutex_lock(&btv->lock); strcpy(t->name, "Radio"); t->type = V4L2_TUNER_RADIO; @@ -3571,8 +3482,6 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t) if (btv->audio_mode_gpio) btv->audio_mode_gpio(btv, t, 0); - mutex_unlock(&btv->lock); - return 0; } @@ -3693,7 +3602,7 @@ static const struct v4l2_file_operations radio_fops = .open = radio_open, .read = radio_read, .release = radio_release, - .ioctl = video_ioctl2, + .unlocked_ioctl = video_ioctl2, .poll = radio_poll, }; -- cgit v0.10.2 From 692e42df12e8427219958468301f3d03ca5f0f0d Mon Sep 17 00:00:00 2001 From: Brandon Philips Date: Fri, 17 Dec 2010 12:58:22 -0300 Subject: [media] bttv: remove unneeded locking comments After Mauro's "bttv: Fix locking issues due to BKL removal code" there are a number of comments that are no longer needed about lock ordering. Remove them. Signed-off-by: Brandon Philips Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/bt8xx/bttv-driver.c b/drivers/media/video/bt8xx/bttv-driver.c index c14b819..e071b62 100644 --- a/drivers/media/video/bt8xx/bttv-driver.c +++ b/drivers/media/video/bt8xx/bttv-driver.c @@ -2359,13 +2359,6 @@ static int setup_window_lock(struct bttv_fh *fh, struct bttv *btv, fh->ov.field = win->field; fh->ov.setup_ok = 1; - /* - * FIXME: btv is protected by btv->lock mutex, while btv->init - * is protected by fh->cap.vb_lock. This seems to open the - * possibility for some race situations. Maybe the better would - * be to unify those locks or to use another way to store the - * init values that will be consumed by videobuf callbacks - */ btv->init.ov.w.width = win->w.width; btv->init.ov.w.height = win->w.height; btv->init.ov.field = win->field; @@ -3220,15 +3213,6 @@ static int bttv_open(struct file *file) return -ENOMEM; file->private_data = fh; - /* - * btv is protected by btv->lock mutex, while btv->init and other - * streaming vars are protected by fh->cap.vb_lock. We need to take - * care of both locks to avoid troubles. However, vb_lock is used also - * inside videobuf, without calling buf->lock. So, it is a very bad - * idea to hold both locks at the same time. - * Let's first copy btv->init at fh, holding cap.vb_lock, and then work - * with the rest of init, holding btv->lock. - */ *fh = btv->init; fh->type = type; @@ -3303,10 +3287,6 @@ static int bttv_release(struct file *file) /* free stuff */ - /* - * videobuf uses cap.vb_lock - we should avoid holding btv->lock, - * otherwise we may have dead lock conditions - */ videobuf_mmap_free(&fh->cap); videobuf_mmap_free(&fh->vbi); v4l2_prio_close(&btv->prio, fh->prio); -- cgit v0.10.2 From 5e68f400aad4e2c29e2531cc4413c459fa88cb62 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:14:10 -0300 Subject: [media] gspca - sonixj: Move bridge init to sd start MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 330dadc..5d56989 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -1755,141 +1755,6 @@ static void po2030n_probe(struct gspca_dev *gspca_dev) } } -static void bridge_init(struct gspca_dev *gspca_dev, - const u8 *sn9c1xx) -{ - struct sd *sd = (struct sd *) gspca_dev; - u8 reg0102[2]; - const u8 *reg9a; - static const u8 reg9a_def[] = - {0x00, 0x40, 0x20, 0x00, 0x00, 0x00}; - static const u8 reg9a_spec[] = - {0x00, 0x40, 0x38, 0x30, 0x00, 0x20}; - static const u8 regd4[] = {0x60, 0x00, 0x00}; - - /* sensor clock already enabled in sd_init */ - /* reg_w1(gspca_dev, 0xf1, 0x00); */ - reg_w1(gspca_dev, 0x01, sn9c1xx[1]); - - /* configure gpio */ - reg0102[0] = sn9c1xx[1]; - reg0102[1] = sn9c1xx[2]; - if (gspca_dev->audio) - reg0102[1] |= 0x04; /* keep the audio connection */ - reg_w(gspca_dev, 0x01, reg0102, 2); - reg_w(gspca_dev, 0x08, &sn9c1xx[8], 2); - reg_w(gspca_dev, 0x17, &sn9c1xx[0x17], 5); - switch (sd->sensor) { - case SENSOR_GC0307: - case SENSOR_OV7660: - case SENSOR_PO1030: - case SENSOR_PO2030N: - case SENSOR_SOI768: - case SENSOR_SP80708: - reg9a = reg9a_spec; - break; - default: - reg9a = reg9a_def; - break; - } - reg_w(gspca_dev, 0x9a, reg9a, 6); - - reg_w(gspca_dev, 0xd4, regd4, sizeof regd4); - - reg_w(gspca_dev, 0x03, &sn9c1xx[3], 0x0f); - - switch (sd->sensor) { - case SENSOR_ADCM1700: - reg_w1(gspca_dev, 0x01, 0x43); - reg_w1(gspca_dev, 0x17, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - reg_w1(gspca_dev, 0x01, 0x42); - break; - case SENSOR_GC0307: - msleep(50); - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x22); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - msleep(50); - break; - case SENSOR_MI0360B: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x60); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_MT9V111: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x61); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_OM6802: - msleep(10); - reg_w1(gspca_dev, 0x02, 0x73); - reg_w1(gspca_dev, 0x17, 0x60); - reg_w1(gspca_dev, 0x01, 0x22); - msleep(100); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x17, 0x64); - reg_w1(gspca_dev, 0x17, 0x64); - reg_w1(gspca_dev, 0x01, 0x42); - msleep(10); - reg_w1(gspca_dev, 0x01, 0x42); - i2c_w8(gspca_dev, om6802_init0[0]); - i2c_w8(gspca_dev, om6802_init0[1]); - msleep(15); - reg_w1(gspca_dev, 0x02, 0x71); - msleep(150); - break; - case SENSOR_OV7630: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0xe2); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_OV7648: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - break; - case SENSOR_PO1030: - case SENSOR_SOI768: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_PO2030N: - case SENSOR_OV7660: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - break; - case SENSOR_SP80708: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - msleep(100); - reg_w1(gspca_dev, 0x02, 0x62); - break; - default: -/* case SENSOR_HV7131R: */ -/* case SENSOR_MI0360: */ -/* case SENSOR_MO4000: */ - reg_w1(gspca_dev, 0x01, 0x43); - reg_w1(gspca_dev, 0x17, 0x61); - reg_w1(gspca_dev, 0x01, 0x42); - if (sd->sensor == SENSOR_HV7131R) - hv7131r_probe(gspca_dev); - break; - } -} - /* this function is called at probe time */ static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) @@ -2423,10 +2288,17 @@ static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int i; + u8 reg0102[2]; + const u8 *reg9a; u8 reg1, reg17; const u8 *sn9c1xx; const u8 (*init)[8]; int mode; + static const u8 reg9a_def[] = + {0x00, 0x40, 0x20, 0x00, 0x00, 0x00}; + static const u8 reg9a_spec[] = + {0x00, 0x40, 0x38, 0x30, 0x00, 0x20}; + static const u8 regd4[] = {0x60, 0x00, 0x00}; static const u8 C0[] = { 0x2d, 0x2d, 0x3a, 0x05, 0x04, 0x3f }; static const u8 CA[] = { 0x28, 0xd8, 0x14, 0xec }; static const u8 CA_adcm1700[] = @@ -2448,7 +2320,128 @@ static int sd_start(struct gspca_dev *gspca_dev) /* initialize the bridge */ sn9c1xx = sn_tb[sd->sensor]; - bridge_init(gspca_dev, sn9c1xx); + + /* sensor clock already enabled in sd_init */ + /* reg_w1(gspca_dev, 0xf1, 0x00); */ + reg_w1(gspca_dev, 0x01, sn9c1xx[1]); + + /* configure gpio */ + reg0102[0] = sn9c1xx[1]; + reg0102[1] = sn9c1xx[2]; + if (gspca_dev->audio) + reg0102[1] |= 0x04; /* keep the audio connection */ + reg_w(gspca_dev, 0x01, reg0102, 2); + reg_w(gspca_dev, 0x08, &sn9c1xx[8], 2); + reg_w(gspca_dev, 0x17, &sn9c1xx[0x17], 5); + switch (sd->sensor) { + case SENSOR_GC0307: + case SENSOR_OV7660: + case SENSOR_PO1030: + case SENSOR_PO2030N: + case SENSOR_SOI768: + case SENSOR_SP80708: + reg9a = reg9a_spec; + break; + default: + reg9a = reg9a_def; + break; + } + reg_w(gspca_dev, 0x9a, reg9a, 6); + + reg_w(gspca_dev, 0xd4, regd4, sizeof regd4); + + reg_w(gspca_dev, 0x03, &sn9c1xx[3], 0x0f); + + switch (sd->sensor) { + case SENSOR_ADCM1700: + reg_w1(gspca_dev, 0x01, 0x43); + reg_w1(gspca_dev, 0x17, 0x62); + reg_w1(gspca_dev, 0x01, 0x42); + reg_w1(gspca_dev, 0x01, 0x42); + break; + case SENSOR_GC0307: + msleep(50); + reg_w1(gspca_dev, 0x01, 0x61); + reg_w1(gspca_dev, 0x17, 0x22); + reg_w1(gspca_dev, 0x01, 0x60); + reg_w1(gspca_dev, 0x01, 0x40); + msleep(50); + break; + case SENSOR_MI0360B: + reg_w1(gspca_dev, 0x01, 0x61); + reg_w1(gspca_dev, 0x17, 0x60); + reg_w1(gspca_dev, 0x01, 0x60); + reg_w1(gspca_dev, 0x01, 0x40); + break; + case SENSOR_MT9V111: + reg_w1(gspca_dev, 0x01, 0x61); + reg_w1(gspca_dev, 0x17, 0x61); + reg_w1(gspca_dev, 0x01, 0x60); + reg_w1(gspca_dev, 0x01, 0x40); + break; + case SENSOR_OM6802: + msleep(10); + reg_w1(gspca_dev, 0x02, 0x73); + reg_w1(gspca_dev, 0x17, 0x60); + reg_w1(gspca_dev, 0x01, 0x22); + msleep(100); + reg_w1(gspca_dev, 0x01, 0x62); + reg_w1(gspca_dev, 0x17, 0x64); + reg_w1(gspca_dev, 0x17, 0x64); + reg_w1(gspca_dev, 0x01, 0x42); + msleep(10); + reg_w1(gspca_dev, 0x01, 0x42); + i2c_w8(gspca_dev, om6802_init0[0]); + i2c_w8(gspca_dev, om6802_init0[1]); + msleep(15); + reg_w1(gspca_dev, 0x02, 0x71); + msleep(150); + break; + case SENSOR_OV7630: + reg_w1(gspca_dev, 0x01, 0x61); + reg_w1(gspca_dev, 0x17, 0xe2); + reg_w1(gspca_dev, 0x01, 0x60); + reg_w1(gspca_dev, 0x01, 0x40); + break; + case SENSOR_OV7648: + reg_w1(gspca_dev, 0x01, 0x63); + reg_w1(gspca_dev, 0x17, 0x20); + reg_w1(gspca_dev, 0x01, 0x62); + reg_w1(gspca_dev, 0x01, 0x42); + break; + case SENSOR_PO1030: + case SENSOR_SOI768: + reg_w1(gspca_dev, 0x01, 0x61); + reg_w1(gspca_dev, 0x17, 0x20); + reg_w1(gspca_dev, 0x01, 0x60); + reg_w1(gspca_dev, 0x01, 0x40); + break; + case SENSOR_PO2030N: + case SENSOR_OV7660: + reg_w1(gspca_dev, 0x01, 0x63); + reg_w1(gspca_dev, 0x17, 0x20); + reg_w1(gspca_dev, 0x01, 0x62); + reg_w1(gspca_dev, 0x01, 0x42); + break; + case SENSOR_SP80708: + reg_w1(gspca_dev, 0x01, 0x63); + reg_w1(gspca_dev, 0x17, 0x20); + reg_w1(gspca_dev, 0x01, 0x62); + reg_w1(gspca_dev, 0x01, 0x42); + msleep(100); + reg_w1(gspca_dev, 0x02, 0x62); + break; + default: +/* case SENSOR_HV7131R: */ +/* case SENSOR_MI0360: */ +/* case SENSOR_MO4000: */ + reg_w1(gspca_dev, 0x01, 0x43); + reg_w1(gspca_dev, 0x17, 0x61); + reg_w1(gspca_dev, 0x01, 0x42); + if (sd->sensor == SENSOR_HV7131R) + hv7131r_probe(gspca_dev); + break; + } /* initialize the sensor */ i2c_w_seq(gspca_dev, sensor_init[sd->sensor]); -- cgit v0.10.2 From 4f67f3adefadbb056c1ce2c228916701b566e6fc Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:15:00 -0300 Subject: [media] gspca - sonixj: Fix a bad probe exchange MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 5d56989..6f3ec2e 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -1794,7 +1794,7 @@ static int sd_init(struct gspca_dev *gspca_dev) /* setup a selector by bridge */ reg_w1(gspca_dev, 0xf1, 0x01); reg_r(gspca_dev, 0x00, 1); - reg_w1(gspca_dev, 0xf1, gspca_dev->usb_buf[0]); + reg_w1(gspca_dev, 0xf1, 0x00); reg_r(gspca_dev, 0x00, 1); /* get sonix chip id */ regF1 = gspca_dev->usb_buf[0]; if (gspca_dev->usb_err < 0) @@ -2289,10 +2289,10 @@ static int sd_start(struct gspca_dev *gspca_dev) struct sd *sd = (struct sd *) gspca_dev; int i; u8 reg0102[2]; - const u8 *reg9a; u8 reg1, reg17; const u8 *sn9c1xx; const u8 (*init)[8]; + const u8 *reg9a; int mode; static const u8 reg9a_def[] = {0x00, 0x40, 0x20, 0x00, 0x00, 0x00}; -- cgit v0.10.2 From c6c14330717f9850b4b4c054b81424b9979cd07d Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:15:37 -0300 Subject: [media] gspca - sonixj: Add a flag in the driver_info table MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 6f3ec2e..1b91573 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -64,6 +64,7 @@ struct sd { u8 jpegqual; /* webcam quality */ u8 reg18; + u8 flags; s8 ag_cnt; #define AG_CNT_START 13 @@ -1763,7 +1764,8 @@ static int sd_config(struct gspca_dev *gspca_dev, struct cam *cam; sd->bridge = id->driver_info >> 16; - sd->sensor = id->driver_info; + sd->sensor = id->driver_info >> 8; + sd->flags = id->driver_info; cam = &gspca_dev->cam; if (sd->sensor == SENSOR_ADCM1700) { @@ -2947,7 +2949,11 @@ static const struct sd_desc sd_desc = { /* -- module initialisation -- */ #define BS(bridge, sensor) \ .driver_info = (BRIDGE_ ## bridge << 16) \ - | SENSOR_ ## sensor + | (SENSOR_ ## sensor << 8) +#define BSF(bridge, sensor, flags) \ + .driver_info = (BRIDGE_ ## bridge << 16) \ + | (SENSOR_ ## sensor << 8) \ + | (flags) static const __devinitdata struct usb_device_id device_table[] = { #if !defined CONFIG_USB_SN9C102 && !defined CONFIG_USB_SN9C102_MODULE {USB_DEVICE(0x0458, 0x7025), BS(SN9C120, MI0360)}, -- cgit v0.10.2 From b2272a49e7df37732d73988f00468ce31e1ebc92 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:16:16 -0300 Subject: [media] gspca - sonixj: Set the flag for some devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The flag PDN_INV indicates that the sensor pin S_PWR_DN has not the same value as other webcams with the same sensor. For now, only two webcams have been so detected: the Microsoft's VX1000 and VX3000. Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 1b91573..9c5a2aa 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -97,6 +97,9 @@ enum sensors { SENSOR_SP80708, }; +/* device flags */ +#define PDN_INV 1 /* inverse pin S_PWR_DN / sn_xxx tables */ + /* V4L2 controls supported by the driver */ static void setbrightness(struct gspca_dev *gspca_dev); static void setcontrast(struct gspca_dev *gspca_dev); @@ -2959,8 +2962,8 @@ static const __devinitdata struct usb_device_id device_table[] = { {USB_DEVICE(0x0458, 0x7025), BS(SN9C120, MI0360)}, {USB_DEVICE(0x0458, 0x702e), BS(SN9C120, OV7660)}, #endif - {USB_DEVICE(0x045e, 0x00f5), BS(SN9C105, OV7660)}, - {USB_DEVICE(0x045e, 0x00f7), BS(SN9C105, OV7660)}, + {USB_DEVICE(0x045e, 0x00f5), BSF(SN9C105, OV7660, PDN_INV)}, + {USB_DEVICE(0x045e, 0x00f7), BSF(SN9C105, OV7660, PDN_INV)}, {USB_DEVICE(0x0471, 0x0327), BS(SN9C105, MI0360)}, {USB_DEVICE(0x0471, 0x0328), BS(SN9C105, MI0360)}, {USB_DEVICE(0x0471, 0x0330), BS(SN9C105, MI0360)}, -- cgit v0.10.2 From 4fd350ee2bf129acb933ad5104bc4754b2c7c9ef Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:16:58 -0300 Subject: [media] gspca - sonixj: Add the bit definitions of the bridge reg 0x01 and 0x17 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 9c5a2aa..8ff4c89 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -100,6 +100,19 @@ enum sensors { /* device flags */ #define PDN_INV 1 /* inverse pin S_PWR_DN / sn_xxx tables */ +/* sn9c1xx definitions */ +/* register 0x01 */ +#define S_PWR_DN 0x01 /* sensor power down */ +#define S_PDN_INV 0x02 /* inverse pin S_PWR_DN */ +#define V_TX_EN 0x04 /* video transfer enable */ +#define LED 0x08 /* output to pin LED */ +#define SCL_SEL_OD 0x20 /* open-drain mode */ +#define SYS_SEL_48M 0x40 /* system clock 0: 24MHz, 1: 48MHz */ +/* register 0x17 */ +#define MCK_SIZE_MASK 0x1f /* sensor master clock */ +#define SEN_CLK_EN 0x20 /* enable sensor clock */ +#define DEF_EN 0x80 /* defect pixel by 0: soft, 1: hard */ + /* V4L2 controls supported by the driver */ static void setbrightness(struct gspca_dev *gspca_dev); static void setcontrast(struct gspca_dev *gspca_dev); -- cgit v0.10.2 From 0e4d413af1a9ddd12f82617734eb535007e186a8 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Tue, 14 Dec 2010 16:17:40 -0300 Subject: [media] gspca - sonixj: Better handling of the bridge registers 0x01 and 0x17 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The initial values of the registers 0x01 and 0x17 are taken from the sensor table at capture start and updated according to the flag PDN_INV. Their values are updated at each step of the capture initialization and memorized for reuse in capture stop. This patch also fixed automatically some bad hardcoded values of these registers. Signed-off-by: Jean-François Moine Signed-off-by: Mauro Carvalho Chehab diff --git a/drivers/media/video/gspca/sonixj.c b/drivers/media/video/gspca/sonixj.c index 8ff4c89..e23de57 100644 --- a/drivers/media/video/gspca/sonixj.c +++ b/drivers/media/video/gspca/sonixj.c @@ -63,6 +63,8 @@ struct sd { #define QUALITY_DEF 80 u8 jpegqual; /* webcam quality */ + u8 reg01; + u8 reg17; u8 reg18; u8 flags; @@ -2306,8 +2308,8 @@ static int sd_start(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; int i; + u8 reg01, reg17; u8 reg0102[2]; - u8 reg1, reg17; const u8 *sn9c1xx; const u8 (*init)[8]; const u8 *reg9a; @@ -2341,10 +2343,13 @@ static int sd_start(struct gspca_dev *gspca_dev) /* sensor clock already enabled in sd_init */ /* reg_w1(gspca_dev, 0xf1, 0x00); */ - reg_w1(gspca_dev, 0x01, sn9c1xx[1]); + reg01 = sn9c1xx[1]; + if (sd->flags & PDN_INV) + reg01 ^= S_PDN_INV; /* power down inverted */ + reg_w1(gspca_dev, 0x01, reg01); /* configure gpio */ - reg0102[0] = sn9c1xx[1]; + reg0102[0] = reg01; reg0102[1] = sn9c1xx[2]; if (gspca_dev->audio) reg0102[1] |= 0x04; /* keep the audio connection */ @@ -2370,95 +2375,49 @@ static int sd_start(struct gspca_dev *gspca_dev) reg_w(gspca_dev, 0x03, &sn9c1xx[3], 0x0f); + reg17 = sn9c1xx[0x17]; switch (sd->sensor) { - case SENSOR_ADCM1700: - reg_w1(gspca_dev, 0x01, 0x43); - reg_w1(gspca_dev, 0x17, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - reg_w1(gspca_dev, 0x01, 0x42); - break; case SENSOR_GC0307: - msleep(50); - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x22); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - msleep(50); - break; - case SENSOR_MI0360B: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x60); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_MT9V111: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x61); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); + msleep(50); /*fixme: is it useful? */ break; case SENSOR_OM6802: msleep(10); reg_w1(gspca_dev, 0x02, 0x73); - reg_w1(gspca_dev, 0x17, 0x60); + reg17 |= SEN_CLK_EN; + reg_w1(gspca_dev, 0x17, reg17); reg_w1(gspca_dev, 0x01, 0x22); msleep(100); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x17, 0x64); - reg_w1(gspca_dev, 0x17, 0x64); - reg_w1(gspca_dev, 0x01, 0x42); + reg01 = SCL_SEL_OD | S_PDN_INV; + reg17 &= MCK_SIZE_MASK; + reg17 |= 0x04; /* clock / 4 */ + break; + } + reg01 |= SYS_SEL_48M; + reg_w1(gspca_dev, 0x01, reg01); + reg17 |= SEN_CLK_EN; + reg_w1(gspca_dev, 0x17, reg17); + reg01 &= ~S_PWR_DN; /* sensor power on */ + reg_w1(gspca_dev, 0x01, reg01); + reg01 &= ~SYS_SEL_48M; + reg_w1(gspca_dev, 0x01, reg01); + + switch (sd->sensor) { + case SENSOR_HV7131R: + hv7131r_probe(gspca_dev); /*fixme: is it useful? */ + break; + case SENSOR_OM6802: msleep(10); - reg_w1(gspca_dev, 0x01, 0x42); + reg_w1(gspca_dev, 0x01, reg01); i2c_w8(gspca_dev, om6802_init0[0]); i2c_w8(gspca_dev, om6802_init0[1]); msleep(15); reg_w1(gspca_dev, 0x02, 0x71); msleep(150); break; - case SENSOR_OV7630: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0xe2); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_OV7648: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - break; - case SENSOR_PO1030: - case SENSOR_SOI768: - reg_w1(gspca_dev, 0x01, 0x61); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x60); - reg_w1(gspca_dev, 0x01, 0x40); - break; - case SENSOR_PO2030N: - case SENSOR_OV7660: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); - break; case SENSOR_SP80708: - reg_w1(gspca_dev, 0x01, 0x63); - reg_w1(gspca_dev, 0x17, 0x20); - reg_w1(gspca_dev, 0x01, 0x62); - reg_w1(gspca_dev, 0x01, 0x42); msleep(100); reg_w1(gspca_dev, 0x02, 0x62); break; - default: -/* case SENSOR_HV7131R: */ -/* case SENSOR_MI0360: */ -/* case SENSOR_MO4000: */ - reg_w1(gspca_dev, 0x01, 0x43); - reg_w1(gspca_dev, 0x17, 0x61); - reg_w1(gspca_dev, 0x01, 0x42); - if (sd->sensor == SENSOR_HV7131R) - hv7131r_probe(gspca_dev); - break; } /* initialize the sensor */ @@ -2487,30 +2446,11 @@ static int sd_start(struct gspca_dev *gspca_dev) } reg_w1(gspca_dev, 0x18, sn9c1xx[0x18]); switch (sd->sensor) { - case SENSOR_GC0307: - reg17 = 0xa2; - break; - case SENSOR_MT9V111: - case SENSOR_MI0360B: - reg17 = 0xe0; - break; - case SENSOR_ADCM1700: - case SENSOR_OV7630: - reg17 = 0xe2; - break; - case SENSOR_OV7648: - reg17 = 0x20; - break; - case SENSOR_OV7660: - case SENSOR_SOI768: - reg17 = 0xa0; - break; - case SENSOR_PO1030: - case SENSOR_PO2030N: - reg17 = 0xa0; + case SENSOR_OM6802: +/* case SENSOR_OV7648: * fixme: sometimes */ break; default: - reg17 = 0x60; + reg17 |= DEF_EN; break; } reg_w1(gspca_dev, 0x17, reg17); @@ -2557,95 +2497,67 @@ static int sd_start(struct gspca_dev *gspca_dev) init = NULL; mode = gspca_dev->cam.cam_mode[gspca_dev->curr_mode].priv; - if (mode) - reg1 = 0x46; /* 320x240: clk 48Mhz, video trf enable */ - else - reg1 = 0x06; /* 640x480: clk 24Mhz, video trf enable */ - reg17 = 0x61; /* 0x:20: enable sensor clock */ + reg01 |= SYS_SEL_48M | V_TX_EN; + reg17 &= ~MCK_SIZE_MASK; + reg17 |= 0x02; /* clock / 2 */ switch (sd->sensor) { case SENSOR_ADCM1700: init = adcm1700_sensor_param1; - reg1 = 0x46; - reg17 = 0xe2; break; case SENSOR_GC0307: init = gc0307_sensor_param1; - reg17 = 0xa2; - reg1 = 0x44; + break; + case SENSOR_HV7131R: + case SENSOR_MI0360: + if (mode) + reg01 |= SYS_SEL_48M; /* 320x240: clk 48Mhz */ + else + reg01 &= ~SYS_SEL_48M; /* 640x480: clk 24Mhz */ + reg17 &= ~MCK_SIZE_MASK; + reg17 |= 0x01; /* clock / 1 */ break; case SENSOR_MI0360B: init = mi0360b_sensor_param1; - reg1 &= ~0x02; /* don't inverse pin S_PWR_DN */ - reg17 = 0xe2; break; case SENSOR_MO4000: - if (mode) { -/* reg1 = 0x46; * 320 clk 48Mhz 60fp/s */ - reg1 = 0x06; /* clk 24Mz */ - } else { - reg17 = 0x22; /* 640 MCKSIZE */ -/* reg1 = 0x06; * 640 clk 24Mz (done) */ + if (mode) { /* if 320x240 */ + reg01 &= ~SYS_SEL_48M; /* clk 24Mz */ + reg17 &= ~MCK_SIZE_MASK; + reg17 |= 0x01; /* clock / 1 */ } break; case SENSOR_MT9V111: init = mt9v111_sensor_param1; - if (mode) { - reg1 = 0x04; /* 320 clk 48Mhz */ - } else { -/* reg1 = 0x06; * 640 clk 24Mz (done) */ - reg17 = 0xc2; - } break; case SENSOR_OM6802: init = om6802_sensor_param1; - reg17 = 0x64; /* 640 MCKSIZE */ + if (!mode) { /* if 640x480 */ + reg17 &= ~MCK_SIZE_MASK; + reg17 |= 0x01; /* clock / 4 */ + } break; case SENSOR_OV7630: init = ov7630_sensor_param1; - reg17 = 0xe2; - reg1 = 0x44; break; case SENSOR_OV7648: init = ov7648_sensor_param1; - reg17 = 0x21; -/* reg1 = 0x42; * 42 - 46? */ + reg17 &= ~MCK_SIZE_MASK; + reg17 |= 0x01; /* clock / 1 */ break; case SENSOR_OV7660: init = ov7660_sensor_param1; - if (sd->bridge == BRIDGE_SN9C120) { - if (mode) { /* 320x240 - 160x120 */ - reg17 = 0xa2; - reg1 = 0x44; /* 48 Mhz, video trf eneble */ - } - } else { - reg17 = 0x22; - reg1 = 0x06; /* 24 Mhz, video trf eneble - * inverse power down */ - } break; case SENSOR_PO1030: init = po1030_sensor_param1; - reg17 = 0xa2; - reg1 = 0x44; break; case SENSOR_PO2030N: init = po2030n_sensor_param1; - reg1 = 0x46; - reg17 = 0xa2; break; case SENSOR_SOI768: init = soi768_sensor_param1; - reg1 = 0x44; - reg17 = 0xa2; break; case SENSOR_SP80708: init = sp80708_sensor_param1; - if (mode) { -/*?? reg1 = 0x04; * 320 clk 48Mhz */ - } else { - reg1 = 0x46; /* 640 clk 48Mz */ - reg17 = 0xa2; - } break; } @@ -2695,7 +2607,9 @@ static int sd_start(struct gspca_dev *gspca_dev) setjpegqual(gspca_dev); reg_w1(gspca_dev, 0x17, reg17); - reg_w1(gspca_dev, 0x01, reg1); + reg_w1(gspca_dev, 0x01, reg01); + sd->reg01 = reg01; + sd->reg17 = reg17; sethvflip(gspca_dev); setbrightness(gspca_dev); @@ -2717,41 +2631,64 @@ static void sd_stopN(struct gspca_dev *gspca_dev) { 0xa1, 0x21, 0x76, 0x20, 0x00, 0x00, 0x00, 0x10 }; static const u8 stopsoi768[] = { 0xa1, 0x21, 0x12, 0x80, 0x00, 0x00, 0x00, 0x10 }; - u8 data; - const u8 *sn9c1xx; + u8 reg01; + u8 reg17; - data = 0x0b; + reg01 = sd->reg01; + reg17 = sd->reg17 & ~SEN_CLK_EN; switch (sd->sensor) { + case SENSOR_ADCM1700: case SENSOR_GC0307: - data = 0x29; + case SENSOR_PO2030N: + case SENSOR_SP80708: + reg01 |= LED; + reg_w1(gspca_dev, 0x01, reg01); + reg01 &= ~(LED | V_TX_EN); + reg_w1(gspca_dev, 0x01, reg01); +/* reg_w1(gspca_dev, 0x02, 0x??); * LED off ? */ break; case SENSOR_HV7131R: + reg01 &= ~V_TX_EN; + reg_w1(gspca_dev, 0x01, reg01); i2c_w8(gspca_dev, stophv7131); - data = 0x2b; break; case SENSOR_MI0360: case SENSOR_MI0360B: + reg01 &= ~V_TX_EN; + reg_w1(gspca_dev, 0x01, reg01); +/* reg_w1(gspca_dev, 0x02, 0x40); * LED off ? */ i2c_w8(gspca_dev, stopmi0360); - data = 0x29; break; - case SENSOR_OV7648: - i2c_w8(gspca_dev, stopov7648); - /* fall thru */ case SENSOR_MT9V111: - case SENSOR_OV7630: + case SENSOR_OM6802: case SENSOR_PO1030: - data = 0x29; + reg01 &= ~V_TX_EN; + reg_w1(gspca_dev, 0x01, reg01); + break; + case SENSOR_OV7630: + case SENSOR_OV7648: + reg01 &= ~V_TX_EN; + reg_w1(gspca_dev, 0x01, reg01); + i2c_w8(gspca_dev, stopov7648); + break; + case SENSOR_OV7660: + reg01 &= ~V_TX_EN; + reg_w1(gspca_dev, 0x01, reg01); break; case SENSOR_SOI768: i2c_w8(gspca_dev, stopsoi768); - data = 0x29; break; } - sn9c1xx = sn_tb[sd->sensor]; - reg_w1(gspca_dev, 0x01, sn9c1xx[1]); - reg_w1(gspca_dev, 0x17, sn9c1xx[0x17]); - reg_w1(gspca_dev, 0x01, sn9c1xx[1]); - reg_w1(gspca_dev, 0x01, data); + + reg01 |= SCL_SEL_OD; + reg_w1(gspca_dev, 0x01, reg01); + reg01 |= S_PWR_DN; /* sensor power down */ + reg_w1(gspca_dev, 0x01, reg01); + reg_w1(gspca_dev, 0x17, reg17); + reg01 &= ~SYS_SEL_48M; /* clock 24MHz */ + reg_w1(gspca_dev, 0x01, reg01); + reg01 |= LED; + reg_w1(gspca_dev, 0x01, reg01); /* Don't disable sensor clock as that disables the button on the cam */ /* reg_w1(gspca_dev, 0xf1, 0x01); */ } -- cgit v0.10.2 From bc4cf2bb271b2d557fc510426755da786fc985be Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Tue, 14 Dec 2010 15:57:49 -0500 Subject: arch/tile: handle CLONE_SETTLS in copy_thread(), not user space Previously we were just setting up the "tp" register in the new task as started by clone() in libc. However, this is not quite right, since in principle a signal might be delivered to the new task before it had its TLS set up. (Of course, this race window still exists for resetting the libc getpid() cached value in the new task, in principle. But in any case, we are now doing this exactly the way all other architectures do it.) This change is important for 2.6.37 since the tile glibc we will be submitting upstream will not set TLS in user space any more, so it will only work on a kernel that has this fix. It should also be taken for 2.6.36.x in the stable tree if possible. Signed-off-by: Chris Metcalf Cc: stable diff --git a/arch/tile/kernel/process.c b/arch/tile/kernel/process.c index 8430f45..e90eb53 100644 --- a/arch/tile/kernel/process.c +++ b/arch/tile/kernel/process.c @@ -212,6 +212,13 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, childregs->sp = sp; /* override with new user stack pointer */ /* + * If CLONE_SETTLS is set, set "tp" in the new task to "r4", + * which is passed in as arg #5 to sys_clone(). + */ + if (clone_flags & CLONE_SETTLS) + childregs->tp = regs->regs[4]; + + /* * Copy the callee-saved registers from the passed pt_regs struct * into the context-switch callee-saved registers area. * This way when we start the interrupt-return sequence, the @@ -539,6 +546,7 @@ struct task_struct *__sched _switch_to(struct task_struct *prev, return __switch_to(prev, next, next_current_ksp0(next)); } +/* Note there is an implicit fifth argument if (clone_flags & CLONE_SETTLS). */ SYSCALL_DEFINE5(clone, unsigned long, clone_flags, unsigned long, newsp, void __user *, parent_tidptr, void __user *, child_tidptr, struct pt_regs *, regs) -- cgit v0.10.2 From 81711cee933599fa114abb0d258d8bbabef8adfb Mon Sep 17 00:00:00 2001 From: Chris Metcalf Date: Tue, 14 Dec 2010 16:07:25 -0500 Subject: arch/tile: handle rt_sigreturn() more cleanly The current tile rt_sigreturn() syscall pattern uses the common idiom of loading up pt_regs with all the saved registers from the time of the signal, then anticipating the fact that we will clobber the ABI "return value" register (r0) as we return from the syscall by setting the rt_sigreturn return value to whatever random value was in the pt_regs for r0. However, this breaks in our 64-bit kernel when running "compat" tasks, since we always sign-extend the "return value" register to properly handle returned pointers that are in the upper 2GB of the 32-bit compat address space. Doing this to the sigreturn path then causes occasional random corruption of the 64-bit r0 register. Instead, we stop doing the crazy "load the return-value register" hack in sigreturn. We already have some sigreturn-specific assembly code that we use to pass the pt_regs pointer to C code. We extend that code to also set the link register to point to a spot a few instructions after the usual syscall return address so we don't clobber the saved r0. Now it no longer matters what the rt_sigreturn syscall returns, and the pt_regs structure can be cleanly and completely reloaded. Signed-off-by: Chris Metcalf diff --git a/arch/tile/include/asm/signal.h b/arch/tile/include/asm/signal.h index c1ee1d6..81d92a4 100644 --- a/arch/tile/include/asm/signal.h +++ b/arch/tile/include/asm/signal.h @@ -25,7 +25,7 @@ #if defined(__KERNEL__) && !defined(__ASSEMBLY__) struct pt_regs; -int restore_sigcontext(struct pt_regs *, struct sigcontext __user *, long *); +int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); int setup_sigcontext(struct sigcontext __user *, struct pt_regs *); void do_signal(struct pt_regs *regs); #endif diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index 543d6a3..dbb0dfc 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -290,12 +290,12 @@ long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, return ret; } +/* The assembly shim for this function arranges to ignore the return value. */ long compat_sys_rt_sigreturn(struct pt_regs *regs) { struct compat_rt_sigframe __user *frame = (struct compat_rt_sigframe __user *) compat_ptr(regs->sp); sigset_t set; - long r0; if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) goto badframe; @@ -308,13 +308,13 @@ long compat_sys_rt_sigreturn(struct pt_regs *regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0)) + if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0) goto badframe; - return r0; + return 0; badframe: force_sig(SIGSEGV, current); diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index f5821626..5eed4a0 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S @@ -1342,8 +1342,8 @@ handle_syscall: lw r20, r20 /* Jump to syscall handler. */ - jalr r20; .Lhandle_syscall_link: - FEEDBACK_REENTER(handle_syscall) + jalr r20 +.Lhandle_syscall_link: /* value of "lr" after "jalr r20" above */ /* * Write our r0 onto the stack so it gets restored instead @@ -1352,6 +1352,9 @@ handle_syscall: PTREGS_PTR(r29, PTREGS_OFFSET_REG(0)) sw r29, r0 +.Lsyscall_sigreturn_skip: + FEEDBACK_REENTER(handle_syscall) + /* Do syscall trace again, if requested. */ lw r30, r31 andi r30, r30, _TIF_SYSCALL_TRACE @@ -1536,9 +1539,24 @@ STD_ENTRY_LOCAL(bad_intr) }; \ STD_ENDPROC(_##x) +/* + * Special-case sigreturn to not write r0 to the stack on return. + * This is technically more efficient, but it also avoids difficulties + * in the 64-bit OS when handling 32-bit compat code, since we must not + * sign-extend r0 for the sigreturn return-value case. + */ +#define PTREGS_SYSCALL_SIGRETURN(x, reg) \ + STD_ENTRY(_##x); \ + addli lr, lr, .Lsyscall_sigreturn_skip - .Lhandle_syscall_link; \ + { \ + PTREGS_PTR(reg, PTREGS_OFFSET_BASE); \ + j x \ + }; \ + STD_ENDPROC(_##x) + PTREGS_SYSCALL(sys_execve, r3) PTREGS_SYSCALL(sys_sigaltstack, r2) -PTREGS_SYSCALL(sys_rt_sigreturn, r0) +PTREGS_SYSCALL_SIGRETURN(sys_rt_sigreturn, r0) PTREGS_SYSCALL(sys_cmpxchg_badaddr, r1) /* Save additional callee-saves to pt_regs, put address in r4 and jump. */ diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index 757407e..1260321 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -52,7 +52,7 @@ SYSCALL_DEFINE3(sigaltstack, const stack_t __user *, uss, */ int restore_sigcontext(struct pt_regs *regs, - struct sigcontext __user *sc, long *pr0) + struct sigcontext __user *sc) { int err = 0; int i; @@ -75,17 +75,15 @@ int restore_sigcontext(struct pt_regs *regs, regs->faultnum = INT_SWINT_1_SIGRETURN; - err |= __get_user(*pr0, &sc->gregs[0]); return err; } -/* sigreturn() returns long since it restores r0 in the interrupted code. */ +/* The assembly shim for this function arranges to ignore the return value. */ SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs) { struct rt_sigframe __user *frame = (struct rt_sigframe __user *)(regs->sp); sigset_t set; - long r0; if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) goto badframe; @@ -98,13 +96,13 @@ SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0)) + if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT) goto badframe; - return r0; + return 0; badframe: force_sig(SIGSEGV, current); -- cgit v0.10.2 From 050c6c9b896625d9fa498265be17b82c5fc65257 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Sun, 19 Dec 2010 23:24:27 +0100 Subject: sched: Remove debugging check Linus reported that the new warning introduced by commit f26f9aff6aaf "Sched: fix skip_clock_update optimization" triggers. The need_resched flag can be set by other CPUs asynchronously so this debug check is bogus - remove it. Reported-by: Linus Torvalds Cc: Peter Zijlstra Cc: Mike Galbraith LKML-Reference: Signed-off-by: Ingo Molnar diff --git a/kernel/sched.c b/kernel/sched.c index 456c990..297d1a0 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4128,7 +4128,6 @@ need_resched_nonpreemptible: rq->nr_switches++; rq->curr = next; ++*switch_count; - WARN_ON_ONCE(test_tsk_need_resched(next)); context_switch(rq, prev, next); /* unlocks the rq */ /* -- cgit v0.10.2 From b8da46d3d55807037b58f14621a0949f18053bde Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Mon, 20 Dec 2010 00:29:32 -0500 Subject: clarify a usage constraint for cnt32_to_63() The cnt32_to_63 algorithm relies on proper counter data evaluation ordering to work properly. This was missing from the provided documentation. Let's augment the documentation with the missing usage constraint and fix the only instance that got it wrong. Signed-off-by: Nicolas Pitre Acked-by: David Howells Signed-off-by: Linus Torvalds diff --git a/arch/mn10300/kernel/time.c b/arch/mn10300/kernel/time.c index f860a34..75da468 100644 --- a/arch/mn10300/kernel/time.c +++ b/arch/mn10300/kernel/time.c @@ -40,21 +40,17 @@ unsigned long long sched_clock(void) unsigned long long ll; unsigned l[2]; } tsc64, result; - unsigned long tsc, tmp; + unsigned long tmp; unsigned product[3]; /* 96-bit intermediate value */ /* cnt32_to_63() is not safe with preemption */ preempt_disable(); - /* read the TSC value - */ - tsc = get_cycles(); - - /* expand to 64-bits. + /* expand the tsc to 64-bits. * - sched_clock() must be called once a minute or better or the * following will go horribly wrong - see cnt32_to_63() */ - tsc64.ll = cnt32_to_63(tsc) & 0x7fffffffffffffffULL; + tsc64.ll = cnt32_to_63(get_cycles()) & 0x7fffffffffffffffULL; preempt_enable(); diff --git a/include/linux/cnt32_to_63.h b/include/linux/cnt32_to_63.h index 7605fdd..e3d8bf2 100644 --- a/include/linux/cnt32_to_63.h +++ b/include/linux/cnt32_to_63.h @@ -61,13 +61,31 @@ union cnt32_to_63 { * * 2) this code must not be preempted for a duration longer than the * 32-bit counter half period minus the longest period between two - * calls to this code. + * calls to this code; * * Those requirements ensure proper update to the state bit in memory. * This is usually not a problem in practice, but if it is then a kernel * timer should be scheduled to manage for this code to be executed often * enough. * + * And finally: + * + * 3) the cnt_lo argument must be seen as a globally incrementing value, + * meaning that it should be a direct reference to the counter data which + * can be evaluated according to a specific ordering within the macro, + * and not the result of a previous evaluation stored in a variable. + * + * For example, this is wrong: + * + * u32 partial = get_hw_count(); + * u64 full = cnt32_to_63(partial); + * return full; + * + * This is fine: + * + * u64 full = cnt32_to_63(get_hw_count()); + * return full; + * * Note that the top bit (bit 63) in the returned value should be considered * as garbage. It is not cleared here because callers are likely to use a * multiplier on the returned value which can get rid of the top bit -- cgit v0.10.2 From 3cb50ddf97a0a1ca4c68bc12fa1e727a6b45fbf2 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 20 Dec 2010 15:53:18 +0000 Subject: Fix btrfs b0rkage Buggered-in: 76dda93c6ae2 ("Btrfs: add snapshot/subvolume destroy ioctl") Signed-off-by: Al Viro Acked-by: Chris Mason Signed-off-by: Linus Torvalds diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c index 6f04444..659f532 100644 --- a/fs/btrfs/export.c +++ b/fs/btrfs/export.c @@ -166,7 +166,7 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh, static struct dentry *btrfs_get_parent(struct dentry *child) { struct inode *dir = child->d_inode; - static struct dentry *dentry; + struct dentry *dentry; struct btrfs_root *root = BTRFS_I(dir)->root; struct btrfs_path *path; struct extent_buffer *leaf; -- cgit v0.10.2 From 453434cf3fdcd3954bb52460e37d4945a0913d3e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 20 Dec 2010 21:21:49 -0800 Subject: Fix build error in drivers/block/cciss.c .. caused by a missing semi-colon, introduced in commit 0fc13c8995cd ("cciss: fix cciss_revalidate panic"). Reported-by: Stephen Rothwell Reported-by: Thiago Farina Cc: Jens Axboe Signed-off-by: Linus Torvalds diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 233e06c..8e0f925 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -2835,7 +2835,7 @@ static int cciss_revalidate(struct gendisk *disk) for (logvol = 0; logvol < CISS_MAX_LUN; logvol++) { if (!h->drv[logvol]) - continue + continue; if (memcmp(h->drv[logvol]->LunID, drv->LunID, sizeof(drv->LunID)) == 0) { FOUND = 1; -- cgit v0.10.2 From 90a8a73c06cc32b609a880d48449d7083327e11a Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Dec 2010 11:26:40 -0800 Subject: Linux 2.6.37-rc7 diff --git a/Makefile b/Makefile index 5aa4427..77044b7 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ VERSION = 2 PATCHLEVEL = 6 SUBLEVEL = 37 -EXTRAVERSION = -rc6 +EXTRAVERSION = -rc7 NAME = Flesh-Eating Bats with Fangs # *DOCUMENTATION* -- cgit v0.10.2 From c166381d4013fd32512f124c237f4213ae9888e9 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Thu, 9 Dec 2010 18:39:58 +0100 Subject: OMAP2+: disable idle early in the suspend sequence Some bad interaction between the idle and the suspend paths has been identified: the idle code is called during the suspend enter and exit sequences. This could cause corruption or lock-up of resources. The solution is to move the calls to disable_hlt at the very beginning of the suspend sequence (ex. in omap3_pm_begin instead of omap3_pm_prepare), and the call to enable_hlt at the very end of the suspend sequence (ex. in omap3_pm_end instead of omap3_pm_finish). Tested with RET and OFF on Beagle and OMAP3EVM. Signed-off-by: Jean Pihet Cc: Kevin Hilman Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm24xx.c b/arch/arm/mach-omap2/pm24xx.c index aaeea49..aea7ced 100644 --- a/arch/arm/mach-omap2/pm24xx.c +++ b/arch/arm/mach-omap2/pm24xx.c @@ -301,14 +301,8 @@ out: static int omap2_pm_begin(suspend_state_t state) { - suspend_state = state; - return 0; -} - -static int omap2_pm_prepare(void) -{ - /* We cannot sleep in idle until we have resumed */ disable_hlt(); + suspend_state = state; return 0; } @@ -349,21 +343,15 @@ static int omap2_pm_enter(suspend_state_t state) return ret; } -static void omap2_pm_finish(void) -{ - enable_hlt(); -} - static void omap2_pm_end(void) { suspend_state = PM_SUSPEND_ON; + enable_hlt(); } static struct platform_suspend_ops omap_pm_ops = { .begin = omap2_pm_begin, - .prepare = omap2_pm_prepare, .enter = omap2_pm_enter, - .finish = omap2_pm_finish, .end = omap2_pm_end, .valid = suspend_valid_only_mem, }; diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 648b8c5..5bf344a 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -529,12 +529,6 @@ out: } #ifdef CONFIG_SUSPEND -static int omap3_pm_prepare(void) -{ - disable_hlt(); - return 0; -} - static int omap3_pm_suspend(void) { struct power_state *pwrst; @@ -597,14 +591,10 @@ static int omap3_pm_enter(suspend_state_t unused) return ret; } -static void omap3_pm_finish(void) -{ - enable_hlt(); -} - /* Hooks to enable / disable UART interrupts during suspend */ static int omap3_pm_begin(suspend_state_t state) { + disable_hlt(); suspend_state = state; omap_uart_enable_irqs(0); return 0; @@ -614,15 +604,14 @@ static void omap3_pm_end(void) { suspend_state = PM_SUSPEND_ON; omap_uart_enable_irqs(1); + enable_hlt(); return; } static struct platform_suspend_ops omap_pm_ops = { .begin = omap3_pm_begin, .end = omap3_pm_end, - .prepare = omap3_pm_prepare, .enter = omap3_pm_enter, - .finish = omap3_pm_finish, .valid = suspend_valid_only_mem, }; #endif /* CONFIG_SUSPEND */ diff --git a/arch/arm/mach-omap2/pm44xx.c b/arch/arm/mach-omap2/pm44xx.c index 54544b4..6aff996 100644 --- a/arch/arm/mach-omap2/pm44xx.c +++ b/arch/arm/mach-omap2/pm44xx.c @@ -31,12 +31,6 @@ struct power_state { static LIST_HEAD(pwrst_list); #ifdef CONFIG_SUSPEND -static int omap4_pm_prepare(void) -{ - disable_hlt(); - return 0; -} - static int omap4_pm_suspend(void) { do_wfi(); @@ -59,28 +53,22 @@ static int omap4_pm_enter(suspend_state_t suspend_state) return ret; } -static void omap4_pm_finish(void) -{ - enable_hlt(); - return; -} - static int omap4_pm_begin(suspend_state_t state) { + disable_hlt(); return 0; } static void omap4_pm_end(void) { + enable_hlt(); return; } static struct platform_suspend_ops omap_pm_ops = { .begin = omap4_pm_begin, .end = omap4_pm_end, - .prepare = omap4_pm_prepare, .enter = omap4_pm_enter, - .finish = omap4_pm_finish, .valid = suspend_valid_only_mem, }; #endif /* CONFIG_SUSPEND */ -- cgit v0.10.2 From 1cbbe37ac5c78fb59ce02f639d6c4f69b610cf5e Mon Sep 17 00:00:00 2001 From: Thara Gopinath Date: Mon, 20 Dec 2010 21:17:21 +0530 Subject: OMAP: pm.c correct the initcall for an early init. omap2_common_pm_init is the API where generic system devices like mpu, l3 etc get initialized. This has to happen really early on during the boot and not at a later time. This is especially important with the new opp changes as these devices need to be built before the opp tables init happen. Today both are device initcalls and it works just because of the order of compilation. Making this postcore_initcall is ideal because the omap device layer init happens as a core_initcall and typically rest of the driver/device inits are arch_initcall or something lower. Signed-off-by: Thara Gopinath Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm.c b/arch/arm/mach-omap2/pm.c index 59ca03b..6ec2ee1 100644 --- a/arch/arm/mach-omap2/pm.c +++ b/arch/arm/mach-omap2/pm.c @@ -143,5 +143,5 @@ static int __init omap2_common_pm_init(void) return 0; } -device_initcall(omap2_common_pm_init); +postcore_initcall(omap2_common_pm_init); -- cgit v0.10.2 From 0bd40535365c318e331f5e872030a710d5746167 Mon Sep 17 00:00:00 2001 From: Richard Woodruff Date: Mon, 20 Dec 2010 14:05:03 -0600 Subject: OMAP3: PM: Update clean_l2 to use v7_flush_dcache_all Analysis in TI kernel with ETM showed that using cache mapped flush in kernel instead of SO mapped flush cost drops by 65% (3.39mS down to 1.17mS) for clean_l2 which is used during sleep sequences. Overall: - speed up - unfortunately there isn't a good alternative flush method today - code reduction and less maintenance and potential bug in unmaintained code This also fixes the bug with the clean_l2 function usage. Reported-by: Tony Lindgren Cc: Kevin Hilman Cc: Tony Lindgren Acked-by: Santosh Shilimkar Acked-by: Jean Pihet [nm@ti.com: ported rkw's proposal to 2.6.37-rc2] Signed-off-by: Nishanth Menon Signed-off-by: Richard Woodruff Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 2fb205a..aa43da5 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -520,72 +520,18 @@ clean_caches: cmp r9, #1 /* Check whether L2 inval is required or not*/ bne skip_l2_inval clean_l2: - /* read clidr */ - mrc p15, 1, r0, c0, c0, 1 - /* extract loc from clidr */ - ands r3, r0, #0x7000000 - /* left align loc bit field */ - mov r3, r3, lsr #23 - /* if loc is 0, then no need to clean */ - beq finished - /* start clean at cache level 0 */ - mov r10, #0 -loop1: - /* work out 3x current cache level */ - add r2, r10, r10, lsr #1 - /* extract cache type bits from clidr*/ - mov r1, r0, lsr r2 - /* mask of the bits for current cache only */ - and r1, r1, #7 - /* see what cache we have at this level */ - cmp r1, #2 - /* skip if no cache, or just i-cache */ - blt skip - /* select current cache level in cssr */ - mcr p15, 2, r10, c0, c0, 0 - /* isb to sych the new cssr&csidr */ - isb - /* read the new csidr */ - mrc p15, 1, r1, c0, c0, 0 - /* extract the length of the cache lines */ - and r2, r1, #7 - /* add 4 (line length offset) */ - add r2, r2, #4 - ldr r4, assoc_mask - /* find maximum number on the way size */ - ands r4, r4, r1, lsr #3 - /* find bit position of way size increment */ - clz r5, r4 - ldr r7, numset_mask - /* extract max number of the index size*/ - ands r7, r7, r1, lsr #13 -loop2: - mov r9, r4 - /* create working copy of max way size*/ -loop3: - /* factor way and cache number into r11 */ - orr r11, r10, r9, lsl r5 - /* factor index number into r11 */ - orr r11, r11, r7, lsl r2 - /*clean & invalidate by set/way */ - mcr p15, 0, r11, c7, c10, 2 - /* decrement the way*/ - subs r9, r9, #1 - bge loop3 - /*decrement the index */ - subs r7, r7, #1 - bge loop2 -skip: - add r10, r10, #2 - /* increment cache number */ - cmp r3, r10 - bgt loop1 -finished: - /*swith back to cache level 0 */ - mov r10, #0 - /* select current cache level in cssr */ - mcr p15, 2, r10, c0, c0, 0 - isb + /* + * Jump out to kernel flush routine + * - reuse that code is better + * - it executes in a cached space so is faster than refetch per-block + * - should be faster and will change with kernel + * - 'might' have to copy address, load and jump to it + * - lr is used since we are running in SRAM currently. + */ + ldr r1, kernel_flush + mov lr, pc + bx r1 + skip_l2_inval: /* Data memory barrier and Data sync barrier */ mov r1, #0 @@ -668,5 +614,7 @@ cache_pred_disable_mask: .word 0xFFFFE7FB control_stat: .word CONTROL_STAT +kernel_flush: + .word v7_flush_dcache_all ENTRY(omap34xx_cpu_suspend_sz) .word . - omap34xx_cpu_suspend -- cgit v0.10.2 From 9d93b8a2c8c78972f0a3d15a820288dbb3968bf2 Mon Sep 17 00:00:00 2001 From: Peter 'p2' De Schrijver Date: Mon, 20 Dec 2010 14:05:04 -0600 Subject: OMAP3: PM: Erratum i581 support: dll kick strategy Erratum i581 impacts OMAP3 platforms. PRCM DPLL control FSM removes SDRC_IDLEREQ before DPLL3 locks causing the DPLL not to be locked at times. IMPORTANT: *) This is not a complete workaround implementation as recommended by the silicon erratum. This is a support logic for detecting lockups and attempting to recover where possible and is known to provide stability in multiple platforms. *) This code is mostly important for inactive and retention. The ROM code waits for the maximum DLL lock time when resuming from off mode. So for off mode this code isn't really needed. *) counters are introduced here for eventual export to userspace once the cleanups are completed. This should eventually get refactored as part of cleanups to sleep34xx.S Cc: Kevin Hilman Cc: Tony Lindgren Signed-off-by: Peter 'p2' De Schrijver Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index aa43da5..24ecb0a 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -42,6 +42,7 @@ OMAP3430_PM_PREPWSTST) #define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL #define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1) +#define CM_IDLEST_CKGEN_V OMAP34XX_CM_REGADDR(PLL_MOD, CM_IDLEST) #define SRAM_BASE_P 0x40200000 #define CONTROL_STAT 0x480022F0 #define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is @@ -555,31 +556,67 @@ skip_l2_inval: /* Make sure SDRC accesses are ok */ wait_sdrc_ok: + +/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this. */ + ldr r4, cm_idlest_ckgen +wait_dpll3_lock: + ldr r5, [r4] + tst r5, #1 + beq wait_dpll3_lock + ldr r4, cm_idlest1_core +wait_sdrc_ready: ldr r5, [r4] - and r5, r5, #0x2 - cmp r5, #0 - bne wait_sdrc_ok + tst r5, #0x2 + bne wait_sdrc_ready + /* allow DLL powerdown upon hw idle req */ ldr r4, sdrc_power ldr r5, [r4] bic r5, r5, #0x40 str r5, [r4] -wait_dll_lock: +is_dll_in_lock_mode: + /* Is dll in lock mode? */ ldr r4, sdrc_dlla_ctrl ldr r5, [r4] tst r5, #0x4 bxne lr /* wait till dll locks */ - ldr r4, sdrc_dlla_status +wait_dll_lock_timed: + ldr r4, wait_dll_lock_counter + add r4, r4, #1 + str r4, wait_dll_lock_counter + ldr r4, sdrc_dlla_status + mov r6, #8 /* Wait 20uS for lock */ +wait_dll_lock: + subs r6, r6, #0x1 + beq kick_dll ldr r5, [r4] and r5, r5, #0x4 cmp r5, #0x4 bne wait_dll_lock bx lr + /* disable/reenable DLL if not locked */ +kick_dll: + ldr r4, sdrc_dlla_ctrl + ldr r5, [r4] + mov r6, r5 + bic r6, #(1<<3) /* disable dll */ + str r6, [r4] + dsb + orr r6, r6, #(1<<3) /* enable dll */ + str r6, [r4] + dsb + ldr r4, kick_counter + add r4, r4, #1 + str r4, kick_counter + b wait_dll_lock_timed + cm_idlest1_core: .word CM_IDLEST1_CORE_V +cm_idlest_ckgen: + .word CM_IDLEST_CKGEN_V sdrc_dlla_status: .word SDRC_DLLA_STATUS_V sdrc_dlla_ctrl: @@ -616,5 +653,13 @@ control_stat: .word CONTROL_STAT kernel_flush: .word v7_flush_dcache_all + /* + * When exporting to userspace while the counters are in SRAM, + * these 2 words need to be at the end to facilitate retrival! + */ +kick_counter: + .word 0 +wait_dll_lock_counter: + .word 0 ENTRY(omap34xx_cpu_suspend_sz) .word . - omap34xx_cpu_suspend -- cgit v0.10.2 From 8cdfd83473d9b408b924b5d32777ac3fddd251ff Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Mon, 20 Dec 2010 14:05:05 -0600 Subject: OMAP3: pm: introduce errata handling Introduce errata handling for OMAP3. This patch introduces errata variable and stub for initialization which will be filled up by follow-on patches. Signed-off-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 0d75bfd..0348fd7 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -85,4 +85,11 @@ extern unsigned int save_secure_ram_context_sz; extern unsigned int omap24xx_cpu_suspend_sz; extern unsigned int omap34xx_cpu_suspend_sz; +#if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) +extern u16 pm34xx_errata; +#define IS_PM34XX_ERRATUM(id) (pm34xx_errata & (id)) +#else +#define IS_PM34XX_ERRATUM(id) 0 +#endif /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */ + #endif diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 5bf344a..288bee3 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -68,6 +68,9 @@ static inline bool is_suspending(void) #define OMAP343X_TABLE_VALUE_OFFSET 0xc0 #define OMAP343X_CONTROL_REG_VALUE_OFFSET 0xc8 +/* pm34xx errata defined in pm.h */ +u16 pm34xx_errata; + struct power_state { struct powerdomain *pwrdm; u32 next_state; @@ -991,6 +994,10 @@ void omap_push_sram_idle(void) save_secure_ram_context_sz); } +static void __init pm_errata_configure(void) +{ +} + static int __init omap3_pm_init(void) { struct power_state *pwrst, *tmp; @@ -1000,6 +1007,8 @@ static int __init omap3_pm_init(void) if (!cpu_is_omap34xx()) return -ENODEV; + pm_errata_configure(); + printk(KERN_ERR "Power Management for TI OMAP3.\n"); /* XXX prcm_setup_regs needs to be before enabling hw -- cgit v0.10.2 From 458e999eb14a301d4176783c8fcb277f5d009b4e Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Mon, 20 Dec 2010 14:05:06 -0600 Subject: OMAP3630: PM: Erratum i608: disable RTA Erratum id: i608 RTA (Retention Till Access) feature is not supported and leads to device stability issues when enabled. This impacts modules with embedded memories on OMAP3630 Workaround is to disable RTA on boot and coming out of core off. For disabling RTA coming out of off mode, we do this by overriding the restore pointer for 3630 as the first point of entry before caches are touched and is common for GP and HS devices. To disable earlier than this could be possible by modifying the PPA for HS devices, but not for GP devices. Cc: Kevin Hilman Cc: Tony Lindgren Acked-by: Jean Pihet Acked-by: Santosh Shilimkar [ambresh@ti.com: co-developer] Signed-off-by: Ambresh K Signed-off-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 1fa3294..27ed558 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -241,7 +241,10 @@ void omap3_save_scratchpad_contents(void) /* Populate the Scratchpad contents */ scratchpad_contents.boot_config_ptr = 0x0; - if (omap_rev() != OMAP3430_REV_ES3_0 && + if (cpu_is_omap3630()) + scratchpad_contents.public_restore_ptr = + virt_to_phys(get_omap3630_restore_pointer()); + else if (omap_rev() != OMAP3430_REV_ES3_0 && omap_rev() != OMAP3430_REV_ES3_1) scratchpad_contents.public_restore_ptr = virt_to_phys(get_restore_pointer()); @@ -474,4 +477,12 @@ void omap3_control_restore_context(void) omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI); return; } + +void omap3630_ctrl_disable_rta(void) +{ + if (!cpu_is_omap3630()) + return; + omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL); +} + #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h index b6c6b7c..ec98dd7 100644 --- a/arch/arm/mach-omap2/control.h +++ b/arch/arm/mach-omap2/control.h @@ -204,6 +204,10 @@ #define OMAP343X_CONTROL_WKUP_DEBOBS3 (OMAP343X_CONTROL_GENERAL_WKUP + 0x014) #define OMAP343X_CONTROL_WKUP_DEBOBS4 (OMAP343X_CONTROL_GENERAL_WKUP + 0x018) +/* 36xx-only RTA - Retention till Accesss control registers and bits */ +#define OMAP36XX_CONTROL_MEM_RTA_CTRL 0x40C +#define OMAP36XX_RTA_DISABLE 0x0 + /* 34xx D2D idle-related pins, handled by PM core */ #define OMAP3_PADCONF_SAD2D_MSTANDBY 0x250 #define OMAP3_PADCONF_SAD2D_IDLEACK 0x254 @@ -347,10 +351,11 @@ extern void omap3_save_scratchpad_contents(void); extern void omap3_clear_scratchpad_contents(void); extern u32 *get_restore_pointer(void); extern u32 *get_es3_restore_pointer(void); +extern u32 *get_omap3630_restore_pointer(void); extern u32 omap3_arm_context[128]; extern void omap3_control_save_context(void); extern void omap3_control_restore_context(void); - +extern void omap3630_ctrl_disable_rta(void); #else #define omap_ctrl_base_get() 0 #define omap_ctrl_readb(x) 0 diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 0348fd7..8d9aa3e 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -85,6 +85,8 @@ extern unsigned int save_secure_ram_context_sz; extern unsigned int omap24xx_cpu_suspend_sz; extern unsigned int omap34xx_cpu_suspend_sz; +#define PM_RTA_ERRATUM_i608 (1 << 0) + #if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) extern u16 pm34xx_errata; #define IS_PM34XX_ERRATUM(id) (pm34xx_errata & (id)) diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 288bee3..7dbc000 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -996,6 +996,8 @@ void omap_push_sram_idle(void) static void __init pm_errata_configure(void) { + if (cpu_is_omap3630()) + pm34xx_errata |= PM_RTA_ERRATUM_i608; } static int __init omap3_pm_init(void) @@ -1056,6 +1058,14 @@ static int __init omap3_pm_init(void) pm_idle = omap3_pm_idle; omap3_idle_init(); + /* + * RTA is disabled during initialization as per erratum i608 + * it is safer to disable RTA by the bootloader, but we would like + * to be doubly sure here and prevent any mishaps. + */ + if (IS_PM34XX_ERRATUM(PM_RTA_ERRATUM_i608)) + omap3630_ctrl_disable_rta(); + clkdm_add_wkdep(neon_clkdm, mpu_clkdm); if (omap_type() != OMAP2_DEVICE_TYPE_GP) { omap3_secure_ram_storage = diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 24ecb0a..4abf447 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -45,6 +45,8 @@ #define CM_IDLEST_CKGEN_V OMAP34XX_CM_REGADDR(PLL_MOD, CM_IDLEST) #define SRAM_BASE_P 0x40200000 #define CONTROL_STAT 0x480022F0 +#define CONTROL_MEM_RTA_CTRL (OMAP343X_CTRL_BASE\ + + OMAP36XX_CONTROL_MEM_RTA_CTRL) #define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is * available */ #define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\ @@ -99,6 +101,14 @@ ENTRY(get_restore_pointer) ldmfd sp!, {pc} @ restore regs and return ENTRY(get_restore_pointer_sz) .word . - get_restore_pointer + .text +/* Function call to get the restore pointer for 3630 resume from OFF */ +ENTRY(get_omap3630_restore_pointer) + stmfd sp!, {lr} @ save registers on stack + adr r0, restore_3630 + ldmfd sp!, {pc} @ restore regs and return +ENTRY(get_omap3630_restore_pointer_sz) + .word . - get_omap3630_restore_pointer .text /* Function call to get the restore pointer for for ES3 to resume from OFF */ @@ -246,6 +256,20 @@ copy_to_sram: bne copy_to_sram ldr r1, sram_base blx r1 + b restore + +restore_3630: + /*b restore_es3630*/ @ Enable to debug restore code + ldr r1, pm_prepwstst_core_p + ldr r2, [r1] + and r2, r2, #0x3 + cmp r2, #0x0 @ Check if previous power state of CORE is OFF + bne restore + /* Disable RTA before giving control */ + ldr r1, control_mem_rta + mov r2, #OMAP36XX_RTA_DISABLE + str r2, [r1] + /* Fall thru for the remaining logic */ restore: /* b restore*/ @ Enable to debug restore code /* Check what was the reason for mpu reset and store the reason in r9*/ @@ -651,6 +675,8 @@ cache_pred_disable_mask: .word 0xFFFFE7FB control_stat: .word CONTROL_STAT +control_mem_rta: + .word CONTROL_MEM_RTA_CTRL kernel_flush: .word v7_flush_dcache_all /* -- cgit v0.10.2 From c4236d2e7913d18d058a018f0d19473eb6a11a3c Mon Sep 17 00:00:00 2001 From: Peter 'p2' De Schrijver Date: Mon, 20 Dec 2010 14:05:07 -0600 Subject: OMAP3630: PM: Disable L2 cache while invalidating L2 cache While coming out of MPU OSWR/OFF states, L2 controller is reseted. The reset behavior is implementation specific as per ARMv7 TRM and hence $L2 needs to be invalidated before it's use. Since the AUXCTRL register is also reconfigured, disable L2 cache before invalidating it and re-enables it afterwards. This is as per Cortex-A8 ARM documentation. Currently this is identified as being needed on OMAP3630 as the disable/enable is done from "public side" while, on OMAP3430, this is done in the "secure side". Cc: Kevin Hilman Cc: Tony Lindgren Acked-by: Jean Pihet Acked-by: Santosh Shilimkar [nm@ti.com: ported to 2.6.37-rc2, added hooks to enable the logic only on 3630] Signed-off-by: Nishanth Menon Signed-off-by: Eduardo Valentin Signed-off-by: Peter 'p2' De Schrijver Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 8d9aa3e..5e0bee9 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -90,8 +90,10 @@ extern unsigned int omap34xx_cpu_suspend_sz; #if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) extern u16 pm34xx_errata; #define IS_PM34XX_ERRATUM(id) (pm34xx_errata & (id)) +extern void enable_omap3630_toggle_l2_on_restore(void); #else #define IS_PM34XX_ERRATUM(id) 0 +static inline void enable_omap3630_toggle_l2_on_restore(void) { } #endif /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */ #endif diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 7dbc000..96e309d 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -996,8 +996,11 @@ void omap_push_sram_idle(void) static void __init pm_errata_configure(void) { - if (cpu_is_omap3630()) + if (cpu_is_omap3630()) { pm34xx_errata |= PM_RTA_ERRATUM_i608; + /* Enable the l2 cache toggling in sleep logic */ + enable_omap3630_toggle_l2_on_restore(); + } } static int __init omap3_pm_init(void) diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 4abf447..50887c7 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -111,6 +111,19 @@ ENTRY(get_omap3630_restore_pointer_sz) .word . - get_omap3630_restore_pointer .text +/* + * L2 cache needs to be toggled for stable OFF mode functionality on 3630. + * This function sets up a fflag that will allow for this toggling to take + * place on 3630. Hopefully some version in the future maynot need this + */ +ENTRY(enable_omap3630_toggle_l2_on_restore) + stmfd sp!, {lr} @ save registers on stack + /* Setup so that we will disable and enable l2 */ + mov r1, #0x1 + str r1, l2dis_3630 + ldmfd sp!, {pc} @ restore regs and return + + .text /* Function call to get the restore pointer for for ES3 to resume from OFF */ ENTRY(get_es3_restore_pointer) stmfd sp!, {lr} @ save registers on stack @@ -283,6 +296,14 @@ restore: moveq r9, #0x3 @ MPU OFF => L1 and L2 lost movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation bne logic_l1_restore + + ldr r0, l2dis_3630 + cmp r0, #0x1 @ should we disable L2 on 3630? + bne skipl2dis + mrc p15, 0, r0, c1, c0, 1 + bic r0, r0, #2 @ disable L2 cache + mcr p15, 0, r0, c1, c0, 1 +skipl2dis: ldr r0, control_stat ldr r1, [r0] and r1, #0x700 @@ -343,6 +364,13 @@ smi: .word 0xE1600070 @ Call SMI monitor (smieq) mov r12, #0x2 .word 0xE1600070 @ Call SMI monitor (smieq) logic_l1_restore: + ldr r1, l2dis_3630 + cmp r1, #0x1 @ Do we need to re-enable L2 on 3630? + bne skipl2reen + mrc p15, 0, r1, c1, c0, 1 + orr r1, r1, #2 @ re-enable L2 cache + mcr p15, 0, r1, c1, c0, 1 +skipl2reen: mov r1, #0 /* Invalidate all instruction caches to PoU * and flush branch target cache */ @@ -679,6 +707,8 @@ control_mem_rta: .word CONTROL_MEM_RTA_CTRL kernel_flush: .word v7_flush_dcache_all +l2dis_3630: + .word 0 /* * When exporting to userspace while the counters are in SRAM, * these 2 words need to be at the end to facilitate retrival! -- cgit v0.10.2 From 80723c3fe457a5d29c178da4ac72983f47b37ed7 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Mon, 20 Dec 2010 14:05:08 -0600 Subject: OMAP3: PM: make omap3_cpuidle_update_states independent of enable_off_mode Currently omap3_cpuidle_update_states makes whole sale decision on which C states to update based on enable_off_mode variable Instead, achieve the same functionality by independently providing mpu and core deepest states the system is allowed to achieve and update the idle states accordingly. Acked-by: Santosh Shilimkar Acked-by: Jean Pihet Signed-off-by: Nishanth Menon [khilman: fixed additional user of this API in OMAP CPUidle driver] Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c index 0d50b45..f290e48 100644 --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -293,25 +293,26 @@ select_state: DEFINE_PER_CPU(struct cpuidle_device, omap3_idle_dev); /** - * omap3_cpuidle_update_states - Update the cpuidle states. + * omap3_cpuidle_update_states() - Update the cpuidle states + * @mpu_deepest_state: Enable states upto and including this for mpu domain + * @core_deepest_state: Enable states upto and including this for core domain * - * Currently, this function toggles the validity of idle states based upon - * the flag 'enable_off_mode'. When the flag is set all states are valid. - * Else, states leading to OFF state set to be invalid. + * This goes through the list of states available and enables and disables the + * validity of C states based on deepest state that can be achieved for the + * variable domain */ -void omap3_cpuidle_update_states(void) +void omap3_cpuidle_update_states(u32 mpu_deepest_state, u32 core_deepest_state) { int i; for (i = OMAP3_STATE_C1; i < OMAP3_MAX_STATES; i++) { struct omap3_processor_cx *cx = &omap3_power_states[i]; - if (enable_off_mode) { + if ((cx->mpu_state >= mpu_deepest_state) && + (cx->core_state >= core_deepest_state)) { cx->valid = 1; } else { - if ((cx->mpu_state == PWRDM_POWER_OFF) || - (cx->core_state == PWRDM_POWER_OFF)) - cx->valid = 0; + cx->valid = 0; } } } @@ -504,7 +505,10 @@ int __init omap3_idle_init(void) return -EINVAL; dev->state_count = count; - omap3_cpuidle_update_states(); + if (enable_off_mode) + omap3_cpuidle_update_states(PWRDM_POWER_OFF, PWRDM_POWER_OFF); + else + omap3_cpuidle_update_states(PWRDM_POWER_RET, PWRDM_POWER_RET); if (cpuidle_register_device(dev)) { printk(KERN_ERR "%s: CPUidle register device failed\n", diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 5e0bee9..29663cc 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -58,7 +58,7 @@ extern u32 sleep_while_idle; #endif #if defined(CONFIG_CPU_IDLE) -extern void omap3_cpuidle_update_states(void); +extern void omap3_cpuidle_update_states(u32, u32); #endif #if defined(CONFIG_PM_DEBUG) && defined(CONFIG_DEBUG_FS) diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 96e309d..74bc15e 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -917,7 +917,7 @@ void omap3_pm_off_mode_enable(int enable) state = PWRDM_POWER_RET; #ifdef CONFIG_CPU_IDLE - omap3_cpuidle_update_states(); + omap3_cpuidle_update_states(state, state); #endif list_for_each_entry(pwrst, &pwrst_list, node) { -- cgit v0.10.2 From cc1b6028878646a2419b27e5f590b5e9fe01dc3d Mon Sep 17 00:00:00 2001 From: Eduardo Valentin Date: Mon, 20 Dec 2010 14:05:09 -0600 Subject: OMAP3630: PM: Erratum i583: disable coreoff if < ES1.2 Limitation i583: Self_Refresh Exit issue after OFF mode Issue: When device is waking up from OFF mode, then SDRC state machine sends inappropriate sequence violating JEDEC standards. Impact: OMAP3630 < ES1.2 is impacted as follows depending on the platform: CS0: for 38.4MHz as internal sysclk, DDR content seen to be stable, while for all other sysclk frequencies, varied levels of instability seen based on varied parameters. CS1: impacted This patch takes option #3 as recommended by the Silicon erratum: Avoid core power domain transitioning to OFF mode. Power consumption impact is expected in this case. To do this, we route core OFF requests to RET request on the impacted revisions of silicon. Acked-by: Jean Pihet [nm@ti.com: rebased the code to 2.6.37-rc2- short circuit code changed a bit] Signed-off-by: Nishanth Menon Signed-off-by: Eduardo Valentin Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/cpuidle34xx.c b/arch/arm/mach-omap2/cpuidle34xx.c index f290e48..0fb619c 100644 --- a/arch/arm/mach-omap2/cpuidle34xx.c +++ b/arch/arm/mach-omap2/cpuidle34xx.c @@ -453,6 +453,18 @@ void omap_init_power_states(void) omap3_power_states[OMAP3_STATE_C7].core_state = PWRDM_POWER_OFF; omap3_power_states[OMAP3_STATE_C7].flags = CPUIDLE_FLAG_TIME_VALID | CPUIDLE_FLAG_CHECK_BM; + + /* + * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot + * enable OFF mode in a stable form for previous revisions. + * we disable C7 state as a result. + */ + if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) { + omap3_power_states[OMAP3_STATE_C7].valid = 0; + cpuidle_params_table[OMAP3_STATE_C7].valid = 0; + WARN_ONCE(1, "%s: core off state C7 disabled due to i583\n", + __func__); + } } struct cpuidle_driver omap3_idle_driver = { diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index 29663cc..b4e66f9 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -86,6 +86,7 @@ extern unsigned int omap24xx_cpu_suspend_sz; extern unsigned int omap34xx_cpu_suspend_sz; #define PM_RTA_ERRATUM_i608 (1 << 0) +#define PM_SDRC_WAKEUP_ERRATUM_i583 (1 << 1) #if defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) extern u16 pm34xx_errata; diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index 74bc15e..a81ed25 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -917,12 +917,29 @@ void omap3_pm_off_mode_enable(int enable) state = PWRDM_POWER_RET; #ifdef CONFIG_CPU_IDLE - omap3_cpuidle_update_states(state, state); + /* + * Erratum i583: implementation for ES rev < Es1.2 on 3630. We cannot + * enable OFF mode in a stable form for previous revisions, restrict + * instead to RET + */ + if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583)) + omap3_cpuidle_update_states(state, PWRDM_POWER_RET); + else + omap3_cpuidle_update_states(state, state); #endif list_for_each_entry(pwrst, &pwrst_list, node) { - pwrst->next_state = state; - omap_set_pwrdm_state(pwrst->pwrdm, state); + if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583) && + pwrst->pwrdm == core_pwrdm && + state == PWRDM_POWER_OFF) { + pwrst->next_state = PWRDM_POWER_RET; + WARN_ONCE(1, + "%s: Core OFF disabled due to errata i583\n", + __func__); + } else { + pwrst->next_state = state; + } + omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state); } } @@ -1000,6 +1017,8 @@ static void __init pm_errata_configure(void) pm34xx_errata |= PM_RTA_ERRATUM_i608; /* Enable the l2 cache toggling in sleep logic */ enable_omap3630_toggle_l2_on_restore(); + if (omap_rev() < OMAP3630_REV_ES1_2) + pm34xx_errata |= PM_SDRC_WAKEUP_ERRATUM_i583; } } -- cgit v0.10.2 From d3cdfd2a15d87d040a5f553231b979fbc28b98e7 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:41 +0100 Subject: OMAP3: remove unused code from the ASM sleep code Remove unused code: - macros, - variables, - unused semaphore locking API. This API shall be added back when needed, - infinite loops for debug. Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Reviewed-by: Nishanth Menon Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm.h b/arch/arm/mach-omap2/pm.h index b4e66f9..c04f7b5 100644 --- a/arch/arm/mach-omap2/pm.h +++ b/arch/arm/mach-omap2/pm.h @@ -80,7 +80,6 @@ extern void save_secure_ram_context(u32 *addr); extern void omap3_save_scratchpad_contents(void); extern unsigned int omap24xx_idle_loop_suspend_sz; -extern unsigned int omap34xx_suspend_sz; extern unsigned int save_secure_ram_context_sz; extern unsigned int omap24xx_cpu_suspend_sz; extern unsigned int omap34xx_cpu_suspend_sz; diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 50887c7..8fa9dfe 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -35,11 +35,7 @@ #define SDRC_SCRATCHPAD_SEM_V 0xfa00291c -#define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \ - OMAP3430_PM_PREPWSTST) #define PM_PREPWSTST_CORE_P 0x48306AE8 -#define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \ - OMAP3430_PM_PREPWSTST) #define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL #define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1) #define CM_IDLEST_CKGEN_V OMAP34XX_CM_REGADDR(PLL_MOD, CM_IDLEST) @@ -62,36 +58,10 @@ #define SDRC_DLLA_STATUS_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_STATUS) #define SDRC_DLLA_CTRL_V OMAP34XX_SDRC_REGADDR(SDRC_DLLA_CTRL) - .text -/* Function to acquire the semaphore in scratchpad */ -ENTRY(lock_scratchpad_sem) - stmfd sp!, {lr} @ save registers on stack -wait_sem: - mov r0,#1 - ldr r1, sdrc_scratchpad_sem -wait_loop: - ldr r2, [r1] @ load the lock value - cmp r2, r0 @ is the lock free ? - beq wait_loop @ not free... - swp r2, r0, [r1] @ semaphore free so lock it and proceed - cmp r2, r0 @ did we succeed ? - beq wait_sem @ no - try again - ldmfd sp!, {pc} @ restore regs and return -sdrc_scratchpad_sem: - .word SDRC_SCRATCHPAD_SEM_V -ENTRY(lock_scratchpad_sem_sz) - .word . - lock_scratchpad_sem - - .text -/* Function to release the scratchpad semaphore */ -ENTRY(unlock_scratchpad_sem) - stmfd sp!, {lr} @ save registers on stack - ldr r3, sdrc_scratchpad_sem - mov r2,#0 - str r2,[r3] - ldmfd sp!, {pc} @ restore regs and return -ENTRY(unlock_scratchpad_sem_sz) - .word . - unlock_scratchpad_sem + +/* + * API functions + */ .text /* Function call to get the restore pointer for resume from OFF */ @@ -178,8 +148,7 @@ ENTRY(es3_sdrc_fix_sz) /* Function to call rom code to save secure ram context */ ENTRY(save_secure_ram_context) stmfd sp!, {r1-r12, lr} @ save registers on stack -save_secure_ram_debug: - /* b save_secure_ram_debug */ @ enable to debug save code + adr r3, api_params @ r3 points to parameters str r0, [r3,#0x4] @ r0 has sdram address ldr r12, high_mask @@ -219,8 +188,7 @@ ENTRY(save_secure_ram_context_sz) */ ENTRY(omap34xx_cpu_suspend) stmfd sp!, {r0-r12, lr} @ save registers on stack -loop: - /*b loop*/ @Enable to debug by stepping through code + /* r0 contains restore pointer in sdram */ /* r1 contains information about saving context */ ldr r4, sdrc_power @ read the SDRC_POWER register @@ -252,7 +220,6 @@ loop: ldmfd sp!, {r0-r12, pc} @ restore regs and return restore_es3: - /*b restore_es3*/ @ Enable to debug restore code ldr r5, pm_prepwstst_core_p ldr r4, [r5] and r4, r4, #0x3 @@ -272,7 +239,6 @@ copy_to_sram: b restore restore_3630: - /*b restore_es3630*/ @ Enable to debug restore code ldr r1, pm_prepwstst_core_p ldr r2, [r1] and r2, r2, #0x3 @@ -284,7 +250,6 @@ restore_3630: str r2, [r1] /* Fall thru for the remaining logic */ restore: - /* b restore*/ @ Enable to debug restore code /* Check what was the reason for mpu reset and store the reason in r9*/ /* 1 - Only L1 and logic lost */ /* 2 - Only L2 lost - In this case, we wont be here */ @@ -493,7 +458,6 @@ usettbr0: ldmfd sp!, {r0-r12, pc} @ restore regs and return save_context_wfi: - /*b save_context_wfi*/ @ enable to debug save code mov r8, r0 /* Store SDRAM address in r8 */ mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register mov r4, #0x1 @ Number of parameters for restore call @@ -673,12 +637,8 @@ sdrc_dlla_status: .word SDRC_DLLA_STATUS_V sdrc_dlla_ctrl: .word SDRC_DLLA_CTRL_V -pm_prepwstst_core: - .word PM_PREPWSTST_CORE_V pm_prepwstst_core_p: .word PM_PREPWSTST_CORE_P -pm_prepwstst_mpu: - .word PM_PREPWSTST_MPU_V pm_pwstctrl_mpu: .word PM_PWSTCTRL_MPU_P scratchpad_base: @@ -687,12 +647,6 @@ sram_base: .word SRAM_BASE_P + 0x8000 sdrc_power: .word SDRC_POWER_V -clk_stabilize_delay: - .word 0x000001FF -assoc_mask: - .word 0x3ff -numset_mask: - .word 0x7fff ttbrbit_mask: .word 0xFFFFC000 table_index_mask: -- cgit v0.10.2 From b4b36fd94e4ca99b3258ff24c2c58cdde67085e0 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:42 +0100 Subject: OMAP2+: use global values for the SRAM PA addresses The SRAM PA addresses are locally defined and used at different places, i.e. SRAM management code and idle sleep code. The macros are now defined at a centralized place, for easier maintenance. Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/sdrc.h b/arch/arm/mach-omap2/sdrc.h index 68f57bb..b3f8379 100644 --- a/arch/arm/mach-omap2/sdrc.h +++ b/arch/arm/mach-omap2/sdrc.h @@ -74,5 +74,4 @@ static inline u32 sms_read_reg(u16 reg) */ #define SDRC_MPURATE_LOOPS 96 - #endif diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 8fa9dfe..fb98111 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -26,6 +26,7 @@ */ #include #include +#include #include #include "cm.h" diff --git a/arch/arm/plat-omap/include/plat/sram.h b/arch/arm/plat-omap/include/plat/sram.h index 5905100..9967d5e 100644 --- a/arch/arm/plat-omap/include/plat/sram.h +++ b/arch/arm/plat-omap/include/plat/sram.h @@ -11,6 +11,7 @@ #ifndef __ARCH_ARM_OMAP_SRAM_H #define __ARCH_ARM_OMAP_SRAM_H +#ifndef __ASSEMBLY__ extern void * omap_sram_push(void * start, unsigned long size); extern void omap_sram_reprogram_clock(u32 dpllctl, u32 ckctl); @@ -74,4 +75,14 @@ extern void omap_push_sram_idle(void); static inline void omap_push_sram_idle(void) {} #endif /* CONFIG_PM */ +#endif /* __ASSEMBLY__ */ + +/* + * OMAP2+: define the SRAM PA addresses. + * Used by the SRAM management code and the idle sleep code. + */ +#define OMAP2_SRAM_PA 0x40200000 +#define OMAP3_SRAM_PA 0x40200000 +#define OMAP4_SRAM_PA 0x40300000 + #endif diff --git a/arch/arm/plat-omap/sram.c b/arch/arm/plat-omap/sram.c index 74dac41..86f3eb7 100644 --- a/arch/arm/plat-omap/sram.c +++ b/arch/arm/plat-omap/sram.c @@ -41,15 +41,12 @@ #define OMAP1_SRAM_PA 0x20000000 #define OMAP1_SRAM_VA VMALLOC_END -#define OMAP2_SRAM_PA 0x40200000 -#define OMAP2_SRAM_PUB_PA 0x4020f800 +#define OMAP2_SRAM_PUB_PA (OMAP2_SRAM_PA + 0xf800) #define OMAP2_SRAM_VA 0xfe400000 #define OMAP2_SRAM_PUB_VA (OMAP2_SRAM_VA + 0x800) -#define OMAP3_SRAM_PA 0x40200000 #define OMAP3_SRAM_VA 0xfe400000 -#define OMAP3_SRAM_PUB_PA 0x40208000 +#define OMAP3_SRAM_PUB_PA (OMAP3_SRAM_PA + 0x8000) #define OMAP3_SRAM_PUB_VA (OMAP3_SRAM_VA + 0x8000) -#define OMAP4_SRAM_PA 0x40300000 #define OMAP4_SRAM_VA 0xfe400000 #define OMAP4_SRAM_PUB_PA (OMAP4_SRAM_PA + 0x4000) #define OMAP4_SRAM_PUB_VA (OMAP4_SRAM_VA + 0x4000) -- cgit v0.10.2 From fe360e1c8693bca175338da4c53078b0be807c52 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:43 +0100 Subject: OMAP3: remove hardcoded values from the ASM sleep code Using macros from existing include files for registers addresses. Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Based on original patch from Vishwa. Signed-off-by: Jean Pihet Cc: Vishwanath BS Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/control.h b/arch/arm/mach-omap2/control.h index ec98dd7..6e5f7e5 100644 --- a/arch/arm/mach-omap2/control.h +++ b/arch/arm/mach-omap2/control.h @@ -274,6 +274,8 @@ #define OMAP343X_SCRATCHPAD_ROM (OMAP343X_CTRL_BASE + 0x860) #define OMAP343X_SCRATCHPAD (OMAP343X_CTRL_BASE + 0x910) #define OMAP343X_SCRATCHPAD_ROM_OFFSET 0x19C +#define OMAP343X_SCRATCHPAD_REGADDR(reg) OMAP2_L4_IO_ADDRESS(\ + OMAP343X_SCRATCHPAD + reg) /* AM35XX_CONTROL_IPSS_CLK_CTRL bits */ #define AM35XX_USBOTG_VBUSP_CLK_SHIFT 0 diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index fb98111..39b9322 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -34,20 +34,27 @@ #include "sdrc.h" #include "control.h" -#define SDRC_SCRATCHPAD_SEM_V 0xfa00291c - -#define PM_PREPWSTST_CORE_P 0x48306AE8 +/* + * Registers access definitions + */ +#define SDRC_SCRATCHPAD_SEM_OFFS 0xc +#define SDRC_SCRATCHPAD_SEM_V OMAP343X_SCRATCHPAD_REGADDR\ + (SDRC_SCRATCHPAD_SEM_OFFS) +#define PM_PREPWSTST_CORE_P OMAP3430_PRM_BASE + CORE_MOD +\ + OMAP3430_PM_PREPWSTST #define PM_PWSTCTRL_MPU_P OMAP3430_PRM_BASE + MPU_MOD + OMAP2_PM_PWSTCTRL #define CM_IDLEST1_CORE_V OMAP34XX_CM_REGADDR(CORE_MOD, CM_IDLEST1) #define CM_IDLEST_CKGEN_V OMAP34XX_CM_REGADDR(PLL_MOD, CM_IDLEST) -#define SRAM_BASE_P 0x40200000 -#define CONTROL_STAT 0x480022F0 -#define CONTROL_MEM_RTA_CTRL (OMAP343X_CTRL_BASE\ - + OMAP36XX_CONTROL_MEM_RTA_CTRL) -#define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is - * available */ -#define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE + OMAP343X_CONTROL_MEM_WKUP\ - + SCRATCHPAD_MEM_OFFS) +#define SRAM_BASE_P OMAP3_SRAM_PA +#define CONTROL_STAT OMAP343X_CTRL_BASE + OMAP343X_CONTROL_STATUS +#define CONTROL_MEM_RTA_CTRL (OMAP343X_CTRL_BASE +\ + OMAP36XX_CONTROL_MEM_RTA_CTRL) + +/* Move this as correct place is available */ +#define SCRATCHPAD_MEM_OFFS 0x310 +#define SCRATCHPAD_BASE_P (OMAP343X_CTRL_BASE +\ + OMAP343X_CONTROL_MEM_WKUP +\ + SCRATCHPAD_MEM_OFFS) #define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER) #define SDRC_SYSCONFIG_P (OMAP343X_SDRC_BASE + SDRC_SYSCONFIG) #define SDRC_MR_0_P (OMAP343X_SDRC_BASE + SDRC_MR_0) -- cgit v0.10.2 From 1e81bc015a444e0f908451642b0197199d0c6fa4 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:44 +0100 Subject: OMAP3: re-organize the ASM sleep code Organize the code in the following sections: - register access macros, - API functions, - internal functions. Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 39b9322..5b978b8 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -79,6 +79,7 @@ ENTRY(get_restore_pointer) ldmfd sp!, {pc} @ restore regs and return ENTRY(get_restore_pointer_sz) .word . - get_restore_pointer + .text /* Function call to get the restore pointer for 3630 resume from OFF */ ENTRY(get_omap3630_restore_pointer) @@ -89,9 +90,18 @@ ENTRY(get_omap3630_restore_pointer_sz) .word . - get_omap3630_restore_pointer .text +/* Function call to get the restore pointer for ES3 to resume from OFF */ +ENTRY(get_es3_restore_pointer) + stmfd sp!, {lr} @ save registers on stack + adr r0, restore_es3 + ldmfd sp!, {pc} @ restore regs and return +ENTRY(get_es3_restore_pointer_sz) + .word . - get_es3_restore_pointer + + .text /* * L2 cache needs to be toggled for stable OFF mode functionality on 3630. - * This function sets up a fflag that will allow for this toggling to take + * This function sets up a flag that will allow for this toggling to take * place on 3630. Hopefully some version in the future maynot need this */ ENTRY(enable_omap3630_toggle_l2_on_restore) @@ -101,58 +111,6 @@ ENTRY(enable_omap3630_toggle_l2_on_restore) str r1, l2dis_3630 ldmfd sp!, {pc} @ restore regs and return - .text -/* Function call to get the restore pointer for for ES3 to resume from OFF */ -ENTRY(get_es3_restore_pointer) - stmfd sp!, {lr} @ save registers on stack - adr r0, restore_es3 - ldmfd sp!, {pc} @ restore regs and return -ENTRY(get_es3_restore_pointer_sz) - .word . - get_es3_restore_pointer - -ENTRY(es3_sdrc_fix) - ldr r4, sdrc_syscfg @ get config addr - ldr r5, [r4] @ get value - tst r5, #0x100 @ is part access blocked - it eq - biceq r5, r5, #0x100 @ clear bit if set - str r5, [r4] @ write back change - ldr r4, sdrc_mr_0 @ get config addr - ldr r5, [r4] @ get value - str r5, [r4] @ write back change - ldr r4, sdrc_emr2_0 @ get config addr - ldr r5, [r4] @ get value - str r5, [r4] @ write back change - ldr r4, sdrc_manual_0 @ get config addr - mov r5, #0x2 @ autorefresh command - str r5, [r4] @ kick off refreshes - ldr r4, sdrc_mr_1 @ get config addr - ldr r5, [r4] @ get value - str r5, [r4] @ write back change - ldr r4, sdrc_emr2_1 @ get config addr - ldr r5, [r4] @ get value - str r5, [r4] @ write back change - ldr r4, sdrc_manual_1 @ get config addr - mov r5, #0x2 @ autorefresh command - str r5, [r4] @ kick off refreshes - bx lr -sdrc_syscfg: - .word SDRC_SYSCONFIG_P -sdrc_mr_0: - .word SDRC_MR_0_P -sdrc_emr2_0: - .word SDRC_EMR2_0_P -sdrc_manual_0: - .word SDRC_MANUAL_0_P -sdrc_mr_1: - .word SDRC_MR_1_P -sdrc_emr2_1: - .word SDRC_EMR2_1_P -sdrc_manual_1: - .word SDRC_MANUAL_1_P -ENTRY(es3_sdrc_fix_sz) - .word . - es3_sdrc_fix - /* Function to call rom code to save secure ram context */ ENTRY(save_secure_ram_context) stmfd sp!, {r1-r12, lr} @ save registers on stack @@ -578,6 +536,56 @@ skip_l2_inval: /* restore regs and return */ ldmfd sp!, {r0-r12, pc} + +/* + * Internal functions + */ + + .text +ENTRY(es3_sdrc_fix) + ldr r4, sdrc_syscfg @ get config addr + ldr r5, [r4] @ get value + tst r5, #0x100 @ is part access blocked + it eq + biceq r5, r5, #0x100 @ clear bit if set + str r5, [r4] @ write back change + ldr r4, sdrc_mr_0 @ get config addr + ldr r5, [r4] @ get value + str r5, [r4] @ write back change + ldr r4, sdrc_emr2_0 @ get config addr + ldr r5, [r4] @ get value + str r5, [r4] @ write back change + ldr r4, sdrc_manual_0 @ get config addr + mov r5, #0x2 @ autorefresh command + str r5, [r4] @ kick off refreshes + ldr r4, sdrc_mr_1 @ get config addr + ldr r5, [r4] @ get value + str r5, [r4] @ write back change + ldr r4, sdrc_emr2_1 @ get config addr + ldr r5, [r4] @ get value + str r5, [r4] @ write back change + ldr r4, sdrc_manual_1 @ get config addr + mov r5, #0x2 @ autorefresh command + str r5, [r4] @ kick off refreshes + bx lr + +sdrc_syscfg: + .word SDRC_SYSCONFIG_P +sdrc_mr_0: + .word SDRC_MR_0_P +sdrc_emr2_0: + .word SDRC_EMR2_0_P +sdrc_manual_0: + .word SDRC_MANUAL_0_P +sdrc_mr_1: + .word SDRC_MR_1_P +sdrc_emr2_1: + .word SDRC_EMR2_1_P +sdrc_manual_1: + .word SDRC_MANUAL_1_P +ENTRY(es3_sdrc_fix_sz) + .word . - es3_sdrc_fix + /* Make sure SDRC accesses are ok */ wait_sdrc_ok: -- cgit v0.10.2 From f7dfe3d8a98b7c4869c09826e3a65663cb9c71be Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:45 +0100 Subject: OMAP3: rework of the ASM sleep code execution paths - Reworked and simplified the execution paths for better readability and to avoid duplication of code, - Added comments on the entry and exit points and the interaction with the ROM code for OFF mode restore, - Reworked the existing comments for better readability. Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 27ed558..0269bb0 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -239,7 +239,14 @@ void omap3_save_scratchpad_contents(void) struct omap3_scratchpad_prcm_block prcm_block_contents; struct omap3_scratchpad_sdrc_block sdrc_block_contents; - /* Populate the Scratchpad contents */ + /* + * Populate the Scratchpad contents + * + * The "get_*restore_pointer" functions are used to provide a + * physical restore address where the ROM code jumps while waking + * up from MPU OFF/OSWR state. + * The restore pointer is stored into the scratchpad. + */ scratchpad_contents.boot_config_ptr = 0x0; if (cpu_is_omap3630()) scratchpad_contents.public_restore_ptr = diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 5b978b8..06e4732 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -71,6 +71,13 @@ * API functions */ +/* + * The "get_*restore_pointer" functions are used to provide a + * physical restore address where the ROM code jumps while waking + * up from MPU OFF/OSWR state. + * The restore pointer is stored into the scratchpad. + */ + .text /* Function call to get the restore pointer for resume from OFF */ ENTRY(get_restore_pointer) @@ -102,7 +109,7 @@ ENTRY(get_es3_restore_pointer_sz) /* * L2 cache needs to be toggled for stable OFF mode functionality on 3630. * This function sets up a flag that will allow for this toggling to take - * place on 3630. Hopefully some version in the future maynot need this + * place on 3630. Hopefully some version in the future may not need this. */ ENTRY(enable_omap3630_toggle_l2_on_restore) stmfd sp!, {lr} @ save registers on stack @@ -144,34 +151,162 @@ ENTRY(save_secure_ram_context_sz) .word . - save_secure_ram_context /* + * ====================== + * == Idle entry point == + * ====================== + */ + +/* * Forces OMAP into idle state * - * omap34xx_suspend() - This bit of code just executes the WFI - * for normal idles. + * omap34xx_cpu_suspend() - This bit of code saves the CPU context if needed + * and executes the WFI instruction. Calling WFI effectively changes the + * power domains states to the desired target power states. + * * - * Note: This code get's copied to internal SRAM at boot. When the OMAP - * wakes up it continues execution at the point it went to sleep. + * Notes: + * - this code gets copied to internal SRAM at boot. The execution pointer + * in SRAM is _omap_sram_idle. + * - when the OMAP wakes up it continues at different execution points + * depending on the low power mode (non-OFF vs OFF modes), + * cf. 'Resume path for xxx mode' comments. */ ENTRY(omap34xx_cpu_suspend) stmfd sp!, {r0-r12, lr} @ save registers on stack - /* r0 contains restore pointer in sdram */ - /* r1 contains information about saving context */ - ldr r4, sdrc_power @ read the SDRC_POWER register - ldr r5, [r4] @ read the contents of SDRC_POWER - orr r5, r5, #0x40 @ enable self refresh on idle req - str r5, [r4] @ write back to SDRC_POWER register + /* + * r0 contains restore pointer in sdram + * r1 contains information about saving context: + * 0 - No context lost + * 1 - Only L1 and logic lost + * 2 - Only L2 lost + * 3 - Both L1 and L2 lost + */ + /* Directly jump to WFI is the context save is not required */ cmp r1, #0x0 - /* If context save is required, do that and execute wfi */ - bne save_context_wfi + beq omap3_do_wfi + + /* Otherwise fall through to the save context code */ +save_context_wfi: + mov r8, r0 @ Store SDRAM address in r8 + mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register + mov r4, #0x1 @ Number of parameters for restore call + stmia r8!, {r4-r5} @ Push parameters for restore call + mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register + stmia r8!, {r4-r5} @ Push parameters for restore call + + /* Check what that target sleep state is from r1 */ + cmp r1, #0x2 @ Only L2 lost, no need to save context + beq clean_caches + +l1_logic_lost: + /* Store sp and spsr to SDRAM */ + mov r4, sp + mrs r5, spsr + mov r6, lr + stmia r8!, {r4-r6} + /* Save all ARM registers */ + /* Coprocessor access control register */ + mrc p15, 0, r6, c1, c0, 2 + stmia r8!, {r6} + /* TTBR0, TTBR1 and Translation table base control */ + mrc p15, 0, r4, c2, c0, 0 + mrc p15, 0, r5, c2, c0, 1 + mrc p15, 0, r6, c2, c0, 2 + stmia r8!, {r4-r6} + /* + * Domain access control register, data fault status register, + * and instruction fault status register + */ + mrc p15, 0, r4, c3, c0, 0 + mrc p15, 0, r5, c5, c0, 0 + mrc p15, 0, r6, c5, c0, 1 + stmia r8!, {r4-r6} + /* + * Data aux fault status register, instruction aux fault status, + * data fault address register and instruction fault address register + */ + mrc p15, 0, r4, c5, c1, 0 + mrc p15, 0, r5, c5, c1, 1 + mrc p15, 0, r6, c6, c0, 0 + mrc p15, 0, r7, c6, c0, 2 + stmia r8!, {r4-r7} + /* + * user r/w thread and process ID, user r/o thread and process ID, + * priv only thread and process ID, cache size selection + */ + mrc p15, 0, r4, c13, c0, 2 + mrc p15, 0, r5, c13, c0, 3 + mrc p15, 0, r6, c13, c0, 4 + mrc p15, 2, r7, c0, c0, 0 + stmia r8!, {r4-r7} + /* Data TLB lockdown, instruction TLB lockdown registers */ + mrc p15, 0, r5, c10, c0, 0 + mrc p15, 0, r6, c10, c0, 1 + stmia r8!, {r5-r6} + /* Secure or non secure vector base address, FCSE PID, Context PID*/ + mrc p15, 0, r4, c12, c0, 0 + mrc p15, 0, r5, c13, c0, 0 + mrc p15, 0, r6, c13, c0, 1 + stmia r8!, {r4-r6} + /* Primary remap, normal remap registers */ + mrc p15, 0, r4, c10, c2, 0 + mrc p15, 0, r5, c10, c2, 1 + stmia r8!,{r4-r5} + + /* Store current cpsr*/ + mrs r2, cpsr + stmia r8!, {r2} + + mrc p15, 0, r4, c1, c0, 0 + /* save control register */ + stmia r8!, {r4} + +clean_caches: + /* + * Clean Data or unified cache to POU + * How to invalidate only L1 cache???? - #FIX_ME# + * mcr p15, 0, r11, c7, c11, 1 + */ + cmp r1, #0x1 @ Check whether L2 inval is required + beq omap3_do_wfi + +clean_l2: + /* + * jump out to kernel flush routine + * - reuse that code is better + * - it executes in a cached space so is faster than refetch per-block + * - should be faster and will change with kernel + * - 'might' have to copy address, load and jump to it + */ + ldr r1, kernel_flush + mov lr, pc + bx r1 + +omap3_do_wfi: + ldr r4, sdrc_power @ read the SDRC_POWER register + ldr r5, [r4] @ read the contents of SDRC_POWER + orr r5, r5, #0x40 @ enable self refresh on idle req + str r5, [r4] @ write back to SDRC_POWER register + /* Data memory barrier and Data sync barrier */ mov r1, #0 mcr p15, 0, r1, c7, c10, 4 mcr p15, 0, r1, c7, c10, 5 +/* + * =================================== + * == WFI instruction => Enter idle == + * =================================== + */ wfi @ wait for interrupt +/* + * =================================== + * == Resume path for non-OFF modes == + * =================================== + */ nop nop nop @@ -184,7 +319,29 @@ ENTRY(omap34xx_cpu_suspend) nop bl wait_sdrc_ok - ldmfd sp!, {r0-r12, pc} @ restore regs and return +/* + * =================================== + * == Exit point from non-OFF modes == + * =================================== + */ + ldmfd sp!, {r0-r12, pc} @ restore regs and return + + +/* + * ============================== + * == Resume path for OFF mode == + * ============================== + */ + +/* + * The restore_* functions are called by the ROM code + * when back from WFI in OFF mode. + * Cf. the get_*restore_pointer functions. + * + * restore_es3: applies to 34xx >= ES3.0 + * restore_3630: applies to 36xx + * restore: common code for 3xxx + */ restore_es3: ldr r5, pm_prepwstst_core_p ldr r4, [r5] @@ -214,12 +371,17 @@ restore_3630: ldr r1, control_mem_rta mov r2, #OMAP36XX_RTA_DISABLE str r2, [r1] - /* Fall thru for the remaining logic */ + + /* Fall through to common code for the remaining logic */ + restore: - /* Check what was the reason for mpu reset and store the reason in r9*/ - /* 1 - Only L1 and logic lost */ - /* 2 - Only L2 lost - In this case, we wont be here */ - /* 3 - Both L1 and L2 lost */ + /* + * Check what was the reason for mpu reset and store the reason in r9: + * 0 - No context lost + * 1 - Only L1 and logic lost + * 2 - Only L2 lost - In this case, we wont be here + * 3 - Both L1 and L2 lost + */ ldr r1, pm_pwstctrl_mpu ldr r2, [r1] and r2, r2, #0x3 @@ -422,119 +584,12 @@ usettbr0: and r4, r2 mcr p15, 0, r4, c1, c0, 0 +/* + * ============================== + * == Exit point from OFF mode == + * ============================== + */ ldmfd sp!, {r0-r12, pc} @ restore regs and return -save_context_wfi: - mov r8, r0 /* Store SDRAM address in r8 */ - mrc p15, 0, r5, c1, c0, 1 @ Read Auxiliary Control Register - mov r4, #0x1 @ Number of parameters for restore call - stmia r8!, {r4-r5} @ Push parameters for restore call - mrc p15, 1, r5, c9, c0, 2 @ Read L2 AUX ctrl register - stmia r8!, {r4-r5} @ Push parameters for restore call - /* Check what that target sleep state is:stored in r1*/ - /* 1 - Only L1 and logic lost */ - /* 2 - Only L2 lost */ - /* 3 - Both L1 and L2 lost */ - cmp r1, #0x2 /* Only L2 lost */ - beq clean_l2 - cmp r1, #0x1 /* L2 retained */ - /* r9 stores whether to clean L2 or not*/ - moveq r9, #0x0 /* Dont Clean L2 */ - movne r9, #0x1 /* Clean L2 */ -l1_logic_lost: - /* Store sp and spsr to SDRAM */ - mov r4, sp - mrs r5, spsr - mov r6, lr - stmia r8!, {r4-r6} - /* Save all ARM registers */ - /* Coprocessor access control register */ - mrc p15, 0, r6, c1, c0, 2 - stmia r8!, {r6} - /* TTBR0, TTBR1 and Translation table base control */ - mrc p15, 0, r4, c2, c0, 0 - mrc p15, 0, r5, c2, c0, 1 - mrc p15, 0, r6, c2, c0, 2 - stmia r8!, {r4-r6} - /* Domain access control register, data fault status register, - and instruction fault status register */ - mrc p15, 0, r4, c3, c0, 0 - mrc p15, 0, r5, c5, c0, 0 - mrc p15, 0, r6, c5, c0, 1 - stmia r8!, {r4-r6} - /* Data aux fault status register, instruction aux fault status, - datat fault address register and instruction fault address register*/ - mrc p15, 0, r4, c5, c1, 0 - mrc p15, 0, r5, c5, c1, 1 - mrc p15, 0, r6, c6, c0, 0 - mrc p15, 0, r7, c6, c0, 2 - stmia r8!, {r4-r7} - /* user r/w thread and process ID, user r/o thread and process ID, - priv only thread and process ID, cache size selection */ - mrc p15, 0, r4, c13, c0, 2 - mrc p15, 0, r5, c13, c0, 3 - mrc p15, 0, r6, c13, c0, 4 - mrc p15, 2, r7, c0, c0, 0 - stmia r8!, {r4-r7} - /* Data TLB lockdown, instruction TLB lockdown registers */ - mrc p15, 0, r5, c10, c0, 0 - mrc p15, 0, r6, c10, c0, 1 - stmia r8!, {r5-r6} - /* Secure or non secure vector base address, FCSE PID, Context PID*/ - mrc p15, 0, r4, c12, c0, 0 - mrc p15, 0, r5, c13, c0, 0 - mrc p15, 0, r6, c13, c0, 1 - stmia r8!, {r4-r6} - /* Primary remap, normal remap registers */ - mrc p15, 0, r4, c10, c2, 0 - mrc p15, 0, r5, c10, c2, 1 - stmia r8!,{r4-r5} - - /* Store current cpsr*/ - mrs r2, cpsr - stmia r8!, {r2} - - mrc p15, 0, r4, c1, c0, 0 - /* save control register */ - stmia r8!, {r4} -clean_caches: - /* Clean Data or unified cache to POU*/ - /* How to invalidate only L1 cache???? - #FIX_ME# */ - /* mcr p15, 0, r11, c7, c11, 1 */ - cmp r9, #1 /* Check whether L2 inval is required or not*/ - bne skip_l2_inval -clean_l2: - /* - * Jump out to kernel flush routine - * - reuse that code is better - * - it executes in a cached space so is faster than refetch per-block - * - should be faster and will change with kernel - * - 'might' have to copy address, load and jump to it - * - lr is used since we are running in SRAM currently. - */ - ldr r1, kernel_flush - mov lr, pc - bx r1 - -skip_l2_inval: - /* Data memory barrier and Data sync barrier */ - mov r1, #0 - mcr p15, 0, r1, c7, c10, 4 - mcr p15, 0, r1, c7, c10, 5 - - wfi @ wait for interrupt - nop - nop - nop - nop - nop - nop - nop - nop - nop - nop - bl wait_sdrc_ok - /* restore regs and return */ - ldmfd sp!, {r0-r12, pc} /* @@ -687,5 +742,6 @@ kick_counter: .word 0 wait_dll_lock_counter: .word 0 + ENTRY(omap34xx_cpu_suspend_sz) .word . - omap34xx_cpu_suspend -- cgit v0.10.2 From 8352129166b8270253a746f336a4429b349b023d Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:44:46 +0100 Subject: OMAP3: add comments for low power code errata Errata covered: - 1.157 & 1.185 - i443 - i581 Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index a81ed25..c45b4fa 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -146,7 +146,7 @@ static void omap3_core_save_context(void) /* * Force write last pad into memory, as this can fail in some - * cases according to erratas 1.157, 1.185 + * cases according to errata 1.157, 1.185 */ omap_ctrl_writel(omap_ctrl_readl(OMAP343X_PADCONF_ETK_D14), OMAP343X_CONTROL_MEM_WKUP + 0x2a0); @@ -433,7 +433,7 @@ void omap_sram_idle(void) /* * On EMU/HS devices ROM code restores a SRDC value * from scratchpad which has automatic self refresh on timeout - * of AUTO_CNT = 1 enabled. This takes care of errata 1.142. + * of AUTO_CNT = 1 enabled. This takes care of erratum ID i443. * Hence store/restore the SDRC_POWER register here. */ if (omap_rev() >= OMAP3430_REV_ES3_0 && diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 06e4732..17dfe30 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -596,6 +596,7 @@ usettbr0: * Internal functions */ +/* This function implements the erratum ID i443 WA, applies to 34xx >= ES3.0 */ .text ENTRY(es3_sdrc_fix) ldr r4, sdrc_syscfg @ get config addr @@ -641,6 +642,16 @@ sdrc_manual_1: ENTRY(es3_sdrc_fix_sz) .word . - es3_sdrc_fix +/* + * This function implements the erratum ID i581 WA: + * SDRC state restore before accessing the SDRAM + * + * Only used at return from non-OFF mode. For OFF + * mode the ROM code configures the SDRC and + * the DPLL before calling the restore code directly + * from DDR. + */ + /* Make sure SDRC accesses are ok */ wait_sdrc_ok: -- cgit v0.10.2 From bb1c9034b3ce7f29d3d178a87b42b767611d6574 Mon Sep 17 00:00:00 2001 From: Jean Pihet Date: Sat, 18 Dec 2010 16:49:57 +0100 Subject: OMAP3: ASM sleep code format rework Cosmetic fixes to the code: - white spaces and tabs, - alignement, - comments rephrase and typos, - multi-line comments Tested on N900 and Beagleboard with full RET and OFF modes, using cpuidle and suspend. Signed-off-by: Jean Pihet Acked-by: Santosh Shilimkar Tested-by: Nishanth Menon Signed-off-by: Kevin Hilman diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index 17dfe30..e3b5cd7 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -1,6 +1,4 @@ /* - * linux/arch/arm/mach-omap2/sleep.S - * * (C) Copyright 2007 * Texas Instruments * Karthik Dasu @@ -81,20 +79,20 @@ .text /* Function call to get the restore pointer for resume from OFF */ ENTRY(get_restore_pointer) - stmfd sp!, {lr} @ save registers on stack + stmfd sp!, {lr} @ save registers on stack adr r0, restore - ldmfd sp!, {pc} @ restore regs and return + ldmfd sp!, {pc} @ restore regs and return ENTRY(get_restore_pointer_sz) - .word . - get_restore_pointer + .word . - get_restore_pointer .text /* Function call to get the restore pointer for 3630 resume from OFF */ ENTRY(get_omap3630_restore_pointer) - stmfd sp!, {lr} @ save registers on stack + stmfd sp!, {lr} @ save registers on stack adr r0, restore_3630 - ldmfd sp!, {pc} @ restore regs and return + ldmfd sp!, {pc} @ restore regs and return ENTRY(get_omap3630_restore_pointer_sz) - .word . - get_omap3630_restore_pointer + .word . - get_omap3630_restore_pointer .text /* Function call to get the restore pointer for ES3 to resume from OFF */ @@ -112,16 +110,16 @@ ENTRY(get_es3_restore_pointer_sz) * place on 3630. Hopefully some version in the future may not need this. */ ENTRY(enable_omap3630_toggle_l2_on_restore) - stmfd sp!, {lr} @ save registers on stack + stmfd sp!, {lr} @ save registers on stack /* Setup so that we will disable and enable l2 */ mov r1, #0x1 str r1, l2dis_3630 - ldmfd sp!, {pc} @ restore regs and return + ldmfd sp!, {pc} @ restore regs and return + .text /* Function to call rom code to save secure ram context */ ENTRY(save_secure_ram_context) stmfd sp!, {r1-r12, lr} @ save registers on stack - adr r3, api_params @ r3 points to parameters str r0, [r3,#0x4] @ r0 has sdram address ldr r12, high_mask @@ -165,14 +163,14 @@ ENTRY(save_secure_ram_context_sz) * * * Notes: - * - this code gets copied to internal SRAM at boot. The execution pointer - * in SRAM is _omap_sram_idle. + * - this code gets copied to internal SRAM at boot and after wake-up + * from OFF mode. The execution pointer in SRAM is _omap_sram_idle. * - when the OMAP wakes up it continues at different execution points * depending on the low power mode (non-OFF vs OFF modes), * cf. 'Resume path for xxx mode' comments. */ ENTRY(omap34xx_cpu_suspend) - stmfd sp!, {r0-r12, lr} @ save registers on stack + stmfd sp!, {r0-r12, lr} @ save registers on stack /* * r0 contains restore pointer in sdram @@ -280,9 +278,9 @@ clean_l2: * - should be faster and will change with kernel * - 'might' have to copy address, load and jump to it */ - ldr r1, kernel_flush - mov lr, pc - bx r1 + ldr r1, kernel_flush + mov lr, pc + bx r1 omap3_do_wfi: ldr r4, sdrc_power @ read the SDRC_POWER register @@ -375,18 +373,18 @@ restore_3630: /* Fall through to common code for the remaining logic */ restore: - /* + /* * Check what was the reason for mpu reset and store the reason in r9: * 0 - No context lost - * 1 - Only L1 and logic lost - * 2 - Only L2 lost - In this case, we wont be here - * 3 - Both L1 and L2 lost + * 1 - Only L1 and logic lost + * 2 - Only L2 lost - In this case, we wont be here + * 3 - Both L1 and L2 lost */ - ldr r1, pm_pwstctrl_mpu + ldr r1, pm_pwstctrl_mpu ldr r2, [r1] - and r2, r2, #0x3 - cmp r2, #0x0 @ Check if target power state was OFF or RET - moveq r9, #0x3 @ MPU OFF => L1 and L2 lost + and r2, r2, #0x3 + cmp r2, #0x0 @ Check if target power state was OFF or RET + moveq r9, #0x3 @ MPU OFF => L1 and L2 lost movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation bne logic_l1_restore @@ -402,71 +400,74 @@ skipl2dis: and r1, #0x700 cmp r1, #0x300 beq l2_inv_gp - mov r0, #40 @ set service ID for PPA - mov r12, r0 @ copy secure Service ID in r12 - mov r1, #0 @ set task id for ROM code in r1 - mov r2, #4 @ set some flags in r2, r6 + mov r0, #40 @ set service ID for PPA + mov r12, r0 @ copy secure Service ID in r12 + mov r1, #0 @ set task id for ROM code in r1 + mov r2, #4 @ set some flags in r2, r6 mov r6, #0xff adr r3, l2_inv_api_params @ r3 points to dummy parameters mcr p15, 0, r0, c7, c10, 4 @ data write barrier mcr p15, 0, r0, c7, c10, 5 @ data memory barrier .word 0xE1600071 @ call SMI monitor (smi #1) /* Write to Aux control register to set some bits */ - mov r0, #42 @ set service ID for PPA - mov r12, r0 @ copy secure Service ID in r12 - mov r1, #0 @ set task id for ROM code in r1 - mov r2, #4 @ set some flags in r2, r6 + mov r0, #42 @ set service ID for PPA + mov r12, r0 @ copy secure Service ID in r12 + mov r1, #0 @ set task id for ROM code in r1 + mov r2, #4 @ set some flags in r2, r6 mov r6, #0xff ldr r4, scratchpad_base - ldr r3, [r4, #0xBC] @ r3 points to parameters + ldr r3, [r4, #0xBC] @ r3 points to parameters mcr p15, 0, r0, c7, c10, 4 @ data write barrier mcr p15, 0, r0, c7, c10, 5 @ data memory barrier .word 0xE1600071 @ call SMI monitor (smi #1) #ifdef CONFIG_OMAP3_L2_AUX_SECURE_SAVE_RESTORE /* Restore L2 aux control register */ - @ set service ID for PPA + @ set service ID for PPA mov r0, #CONFIG_OMAP3_L2_AUX_SECURE_SERVICE_SET_ID - mov r12, r0 @ copy service ID in r12 - mov r1, #0 @ set task ID for ROM code in r1 - mov r2, #4 @ set some flags in r2, r6 + mov r12, r0 @ copy service ID in r12 + mov r1, #0 @ set task ID for ROM code in r1 + mov r2, #4 @ set some flags in r2, r6 mov r6, #0xff ldr r4, scratchpad_base ldr r3, [r4, #0xBC] - adds r3, r3, #8 @ r3 points to parameters + adds r3, r3, #8 @ r3 points to parameters mcr p15, 0, r0, c7, c10, 4 @ data write barrier mcr p15, 0, r0, c7, c10, 5 @ data memory barrier .word 0xE1600071 @ call SMI monitor (smi #1) #endif b logic_l1_restore + l2_inv_api_params: - .word 0x1, 0x00 + .word 0x1, 0x00 l2_inv_gp: /* Execute smi to invalidate L2 cache */ - mov r12, #0x1 @ set up to invalide L2 -smi: .word 0xE1600070 @ Call SMI monitor (smieq) + mov r12, #0x1 @ set up to invalidate L2 + .word 0xE1600070 @ Call SMI monitor (smieq) /* Write to Aux control register to set some bits */ ldr r4, scratchpad_base ldr r3, [r4,#0xBC] ldr r0, [r3,#4] mov r12, #0x3 - .word 0xE1600070 @ Call SMI monitor (smieq) + .word 0xE1600070 @ Call SMI monitor (smieq) ldr r4, scratchpad_base ldr r3, [r4,#0xBC] ldr r0, [r3,#12] mov r12, #0x2 - .word 0xE1600070 @ Call SMI monitor (smieq) + .word 0xE1600070 @ Call SMI monitor (smieq) logic_l1_restore: ldr r1, l2dis_3630 - cmp r1, #0x1 @ Do we need to re-enable L2 on 3630? + cmp r1, #0x1 @ Test if L2 re-enable needed on 3630 bne skipl2reen mrc p15, 0, r1, c1, c0, 1 - orr r1, r1, #2 @ re-enable L2 cache + orr r1, r1, #2 @ re-enable L2 cache mcr p15, 0, r1, c1, c0, 1 skipl2reen: mov r1, #0 - /* Invalidate all instruction caches to PoU - * and flush branch target cache */ + /* + * Invalidate all instruction caches to PoU + * and flush branch target cache + */ mcr p15, 0, r1, c7, c5, 0 ldr r4, scratchpad_base @@ -487,33 +488,33 @@ skipl2reen: MCR p15, 0, r6, c2, c0, 1 /* Translation table base control register */ MCR p15, 0, r7, c2, c0, 2 - /*domain access Control Register */ + /* Domain access Control Register */ MCR p15, 0, r8, c3, c0, 0 - /* data fault status Register */ + /* Data fault status Register */ MCR p15, 0, r9, c5, c0, 0 - ldmia r3!,{r4-r8} - /* instruction fault status Register */ + ldmia r3!,{r4-r8} + /* Instruction fault status Register */ MCR p15, 0, r4, c5, c0, 1 - /*Data Auxiliary Fault Status Register */ + /* Data Auxiliary Fault Status Register */ MCR p15, 0, r5, c5, c1, 0 - /*Instruction Auxiliary Fault Status Register*/ + /* Instruction Auxiliary Fault Status Register*/ MCR p15, 0, r6, c5, c1, 1 - /*Data Fault Address Register */ + /* Data Fault Address Register */ MCR p15, 0, r7, c6, c0, 0 - /*Instruction Fault Address Register*/ + /* Instruction Fault Address Register*/ MCR p15, 0, r8, c6, c0, 2 - ldmia r3!,{r4-r7} + ldmia r3!,{r4-r7} - /* user r/w thread and process ID */ + /* User r/w thread and process ID */ MCR p15, 0, r4, c13, c0, 2 - /* user ro thread and process ID */ + /* User ro thread and process ID */ MCR p15, 0, r5, c13, c0, 3 - /*Privileged only thread and process ID */ + /* Privileged only thread and process ID */ MCR p15, 0, r6, c13, c0, 4 - /* cache size selection */ + /* Cache size selection */ MCR p15, 2, r7, c0, c0, 0 - ldmia r3!,{r4-r8} + ldmia r3!,{r4-r8} /* Data TLB lockdown registers */ MCR p15, 0, r4, c10, c0, 0 /* Instruction TLB lockdown registers */ @@ -525,26 +526,27 @@ skipl2reen: /* Context PID */ MCR p15, 0, r8, c13, c0, 1 - ldmia r3!,{r4-r5} - /* primary memory remap register */ + ldmia r3!,{r4-r5} + /* Primary memory remap register */ MCR p15, 0, r4, c10, c2, 0 - /*normal memory remap register */ + /* Normal memory remap register */ MCR p15, 0, r5, c10, c2, 1 /* Restore cpsr */ - ldmia r3!,{r4} /*load CPSR from SDRAM*/ - msr cpsr, r4 /*store cpsr */ + ldmia r3!,{r4} @ load CPSR from SDRAM + msr cpsr, r4 @ store cpsr /* Enabling MMU here */ - mrc p15, 0, r7, c2, c0, 2 /* Read TTBRControl */ - /* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1*/ + mrc p15, 0, r7, c2, c0, 2 @ Read TTBRControl + /* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1 */ and r7, #0x7 cmp r7, #0x0 beq usettbr0 ttbr_error: - /* More work needs to be done to support N[0:2] value other than 0 - * So looping here so that the error can be detected - */ + /* + * More work needs to be done to support N[0:2] value other than 0 + * So looping here so that the error can be detected + */ b ttbr_error usettbr0: mrc p15, 0, r2, c2, c0, 0 @@ -552,21 +554,25 @@ usettbr0: and r2, r5 mov r4, pc ldr r5, table_index_mask - and r4, r5 /* r4 = 31 to 20 bits of pc */ + and r4, r5 @ r4 = 31 to 20 bits of pc /* Extract the value to be written to table entry */ ldr r1, table_entry - add r1, r1, r4 /* r1 has value to be written to table entry*/ + /* r1 has the value to be written to table entry*/ + add r1, r1, r4 /* Getting the address of table entry to modify */ lsr r4, #18 - add r2, r4 /* r2 has the location which needs to be modified */ + /* r2 has the location which needs to be modified */ + add r2, r4 /* Storing previous entry of location being modified */ ldr r5, scratchpad_base ldr r4, [r2] str r4, [r5, #0xC0] /* Modify the table entry */ str r1, [r2] - /* Storing address of entry being modified - * - will be restored after enabling MMU */ + /* + * Storing address of entry being modified + * - will be restored after enabling MMU + */ ldr r5, scratchpad_base str r2, [r5, #0xC4] @@ -575,8 +581,11 @@ usettbr0: mcr p15, 0, r0, c7, c5, 6 @ Invalidate branch predictor array mcr p15, 0, r0, c8, c5, 0 @ Invalidate instruction TLB mcr p15, 0, r0, c8, c6, 0 @ Invalidate data TLB - /* Restore control register but dont enable caches here*/ - /* Caches will be enabled after restoring MMU table entry */ + /* + * Restore control register. This enables the MMU. + * The caches and prediction are not enabled here, they + * will be enabled after restoring the MMU table entry. + */ ldmia r3!, {r4} /* Store previous value of control register in scratchpad */ str r4, [r5, #0xC8] @@ -589,7 +598,7 @@ usettbr0: * == Exit point from OFF mode == * ============================== */ - ldmfd sp!, {r0-r12, pc} @ restore regs and return + ldmfd sp!, {r0-r12, pc} @ restore regs and return /* @@ -655,55 +664,56 @@ ENTRY(es3_sdrc_fix_sz) /* Make sure SDRC accesses are ok */ wait_sdrc_ok: -/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this. */ +/* DPLL3 must be locked before accessing the SDRC. Maybe the HW ensures this */ ldr r4, cm_idlest_ckgen wait_dpll3_lock: ldr r5, [r4] tst r5, #1 beq wait_dpll3_lock - ldr r4, cm_idlest1_core + ldr r4, cm_idlest1_core wait_sdrc_ready: - ldr r5, [r4] - tst r5, #0x2 - bne wait_sdrc_ready + ldr r5, [r4] + tst r5, #0x2 + bne wait_sdrc_ready /* allow DLL powerdown upon hw idle req */ - ldr r4, sdrc_power - ldr r5, [r4] - bic r5, r5, #0x40 - str r5, [r4] -is_dll_in_lock_mode: + ldr r4, sdrc_power + ldr r5, [r4] + bic r5, r5, #0x40 + str r5, [r4] - /* Is dll in lock mode? */ - ldr r4, sdrc_dlla_ctrl - ldr r5, [r4] - tst r5, #0x4 - bxne lr - /* wait till dll locks */ +is_dll_in_lock_mode: + /* Is dll in lock mode? */ + ldr r4, sdrc_dlla_ctrl + ldr r5, [r4] + tst r5, #0x4 + bxne lr @ Return if locked + /* wait till dll locks */ wait_dll_lock_timed: ldr r4, wait_dll_lock_counter add r4, r4, #1 str r4, wait_dll_lock_counter ldr r4, sdrc_dlla_status - mov r6, #8 /* Wait 20uS for lock */ + /* Wait 20uS for lock */ + mov r6, #8 wait_dll_lock: subs r6, r6, #0x1 beq kick_dll - ldr r5, [r4] - and r5, r5, #0x4 - cmp r5, #0x4 - bne wait_dll_lock - bx lr + ldr r5, [r4] + and r5, r5, #0x4 + cmp r5, #0x4 + bne wait_dll_lock + bx lr @ Return when locked /* disable/reenable DLL if not locked */ kick_dll: ldr r4, sdrc_dlla_ctrl ldr r5, [r4] mov r6, r5 - bic r6, #(1<<3) /* disable dll */ + bic r6, #(1<<3) @ disable dll str r6, [r4] dsb - orr r6, r6, #(1<<3) /* enable dll */ + orr r6, r6, #(1<<3) @ enable dll str r6, [r4] dsb ldr r4, kick_counter @@ -728,7 +738,7 @@ scratchpad_base: sram_base: .word SRAM_BASE_P + 0x8000 sdrc_power: - .word SDRC_POWER_V + .word SDRC_POWER_V ttbrbit_mask: .word 0xFFFFC000 table_index_mask: @@ -742,9 +752,9 @@ control_stat: control_mem_rta: .word CONTROL_MEM_RTA_CTRL kernel_flush: - .word v7_flush_dcache_all + .word v7_flush_dcache_all l2dis_3630: - .word 0 + .word 0 /* * When exporting to userspace while the counters are in SRAM, * these 2 words need to be at the end to facilitate retrival! -- cgit v0.10.2