diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 19:54:53 (GMT) |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:01:40 (GMT) |
commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /drivers/staging/dream/qdsp5/adsp_driver.c | |
parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
download | linux-fsl-qoriq-ae19ffbadc1b2100285a5b5b3d0a4e0a11390904.tar.xz |
Merge branch 'master' into for-linus
Diffstat (limited to 'drivers/staging/dream/qdsp5/adsp_driver.c')
-rw-r--r-- | drivers/staging/dream/qdsp5/adsp_driver.c | 641 |
1 files changed, 641 insertions, 0 deletions
diff --git a/drivers/staging/dream/qdsp5/adsp_driver.c b/drivers/staging/dream/qdsp5/adsp_driver.c new file mode 100644 index 0000000..e55a0db --- /dev/null +++ b/drivers/staging/dream/qdsp5/adsp_driver.c @@ -0,0 +1,641 @@ +/* arch/arm/mach-msm/qdsp5/adsp_driver.c + * + * Copyright (C) 2008 Google, Inc. + * Author: Iliyan Malchev <ibm@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <linux/cdev.h> +#include <linux/fs.h> +#include <linux/list.h> +#include <linux/platform_device.h> +#include <linux/sched.h> +#include <linux/uaccess.h> + +#include "adsp.h" + +#include <linux/msm_adsp.h> +#include <linux/android_pmem.h> + +struct adsp_pmem_region { + struct hlist_node list; + void *vaddr; + unsigned long paddr; + unsigned long kvaddr; + unsigned long len; + struct file *file; +}; + +struct adsp_device { + struct msm_adsp_module *module; + + spinlock_t event_queue_lock; + wait_queue_head_t event_wait; + struct list_head event_queue; + int abort; + + const char *name; + struct device *device; + struct cdev cdev; +}; + +static struct adsp_device *inode_to_device(struct inode *inode); + +#define __CONTAINS(r, v, l) ({ \ + typeof(r) __r = r; \ + typeof(v) __v = v; \ + typeof(v) __e = __v + l; \ + int res = __v >= __r->vaddr && \ + __e <= __r->vaddr + __r->len; \ + res; \ +}) + +#define CONTAINS(r1, r2) ({ \ + typeof(r2) __r2 = r2; \ + __CONTAINS(r1, __r2->vaddr, __r2->len); \ +}) + +#define IN_RANGE(r, v) ({ \ + typeof(r) __r = r; \ + typeof(v) __vv = v; \ + int res = ((__vv >= __r->vaddr) && \ + (__vv < (__r->vaddr + __r->len))); \ + res; \ +}) + +#define OVERLAPS(r1, r2) ({ \ + typeof(r1) __r1 = r1; \ + typeof(r2) __r2 = r2; \ + typeof(__r2->vaddr) __v = __r2->vaddr; \ + typeof(__v) __e = __v + __r2->len - 1; \ + int res = (IN_RANGE(__r1, __v) || IN_RANGE(__r1, __e)); \ + res; \ +}) + +static int adsp_pmem_check(struct msm_adsp_module *module, + void *vaddr, unsigned long len) +{ + struct adsp_pmem_region *region_elt; + struct hlist_node *node; + struct adsp_pmem_region t = { .vaddr = vaddr, .len = len }; + + hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { + if (CONTAINS(region_elt, &t) || CONTAINS(&t, region_elt) || + OVERLAPS(region_elt, &t)) { + printk(KERN_ERR "adsp: module %s:" + " region (vaddr %p len %ld)" + " clashes with registered region" + " (vaddr %p paddr %p len %ld)\n", + module->name, + vaddr, len, + region_elt->vaddr, + (void *)region_elt->paddr, + region_elt->len); + return -EINVAL; + } + } + + return 0; +} + +static int adsp_pmem_add(struct msm_adsp_module *module, + struct adsp_pmem_info *info) +{ + unsigned long paddr, kvaddr, len; + struct file *file; + struct adsp_pmem_region *region; + int rc = -EINVAL; + + mutex_lock(&module->pmem_regions_lock); + region = kmalloc(sizeof(*region), GFP_KERNEL); + if (!region) { + rc = -ENOMEM; + goto end; + } + INIT_HLIST_NODE(®ion->list); + if (get_pmem_file(info->fd, &paddr, &kvaddr, &len, &file)) { + kfree(region); + goto end; + } + + rc = adsp_pmem_check(module, info->vaddr, len); + if (rc < 0) { + put_pmem_file(file); + kfree(region); + goto end; + } + + region->vaddr = info->vaddr; + region->paddr = paddr; + region->kvaddr = kvaddr; + region->len = len; + region->file = file; + + hlist_add_head(®ion->list, &module->pmem_regions); +end: + mutex_unlock(&module->pmem_regions_lock); + return rc; +} + +static int adsp_pmem_lookup_vaddr(struct msm_adsp_module *module, void **addr, + unsigned long len, struct adsp_pmem_region **region) +{ + struct hlist_node *node; + void *vaddr = *addr; + struct adsp_pmem_region *region_elt; + + int match_count = 0; + + *region = NULL; + + /* returns physical address or zero */ + hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { + if (vaddr >= region_elt->vaddr && + vaddr < region_elt->vaddr + region_elt->len && + vaddr + len <= region_elt->vaddr + region_elt->len) { + /* offset since we could pass vaddr inside a registerd + * pmem buffer + */ + + match_count++; + if (!*region) + *region = region_elt; + } + } + + if (match_count > 1) { + printk(KERN_ERR "adsp: module %s: " + "multiple hits for vaddr %p, len %ld\n", + module->name, vaddr, len); + hlist_for_each_entry(region_elt, node, + &module->pmem_regions, list) { + if (vaddr >= region_elt->vaddr && + vaddr < region_elt->vaddr + region_elt->len && + vaddr + len <= region_elt->vaddr + region_elt->len) + printk(KERN_ERR "\t%p, %ld --> %p\n", + region_elt->vaddr, + region_elt->len, + (void *)region_elt->paddr); + } + } + + return *region ? 0 : -1; +} + +int adsp_pmem_fixup_kvaddr(struct msm_adsp_module *module, void **addr, + unsigned long *kvaddr, unsigned long len) +{ + struct adsp_pmem_region *region; + void *vaddr = *addr; + unsigned long *paddr = (unsigned long *)addr; + int ret; + + ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); + if (ret) { + printk(KERN_ERR "adsp: not patching %s (paddr & kvaddr)," + " lookup (%p, %ld) failed\n", + module->name, vaddr, len); + return ret; + } + *paddr = region->paddr + (vaddr - region->vaddr); + *kvaddr = region->kvaddr + (vaddr - region->vaddr); + return 0; +} + +int adsp_pmem_fixup(struct msm_adsp_module *module, void **addr, + unsigned long len) +{ + struct adsp_pmem_region *region; + void *vaddr = *addr; + unsigned long *paddr = (unsigned long *)addr; + int ret; + + ret = adsp_pmem_lookup_vaddr(module, addr, len, ®ion); + if (ret) { + printk(KERN_ERR "adsp: not patching %s, lookup (%p, %ld) failed\n", + module->name, vaddr, len); + return ret; + } + + *paddr = region->paddr + (vaddr - region->vaddr); + return 0; +} + +static int adsp_verify_cmd(struct msm_adsp_module *module, + unsigned int queue_id, void *cmd_data, + size_t cmd_size) +{ + /* call the per module verifier */ + if (module->verify_cmd) + return module->verify_cmd(module, queue_id, cmd_data, + cmd_size); + else + printk(KERN_INFO "adsp: no packet verifying function " + "for task %s\n", module->name); + return 0; +} + +static long adsp_write_cmd(struct adsp_device *adev, void __user *arg) +{ + struct adsp_command_t cmd; + unsigned char buf[256]; + void *cmd_data; + long rc; + + if (copy_from_user(&cmd, (void __user *)arg, sizeof(cmd))) + return -EFAULT; + + if (cmd.len > 256) { + cmd_data = kmalloc(cmd.len, GFP_USER); + if (!cmd_data) + return -ENOMEM; + } else { + cmd_data = buf; + } + + if (copy_from_user(cmd_data, (void __user *)(cmd.data), cmd.len)) { + rc = -EFAULT; + goto end; + } + + mutex_lock(&adev->module->pmem_regions_lock); + if (adsp_verify_cmd(adev->module, cmd.queue, cmd_data, cmd.len)) { + printk(KERN_ERR "module %s: verify failed.\n", + adev->module->name); + rc = -EINVAL; + goto end; + } + rc = msm_adsp_write(adev->module, cmd.queue, cmd_data, cmd.len); +end: + mutex_unlock(&adev->module->pmem_regions_lock); + + if (cmd.len > 256) + kfree(cmd_data); + + return rc; +} + +static int adsp_events_pending(struct adsp_device *adev) +{ + unsigned long flags; + int yes; + spin_lock_irqsave(&adev->event_queue_lock, flags); + yes = !list_empty(&adev->event_queue); + spin_unlock_irqrestore(&adev->event_queue_lock, flags); + return yes || adev->abort; +} + +static int adsp_pmem_lookup_paddr(struct msm_adsp_module *module, void **addr, + struct adsp_pmem_region **region) +{ + struct hlist_node *node; + unsigned long paddr = (unsigned long)(*addr); + struct adsp_pmem_region *region_elt; + + hlist_for_each_entry(region_elt, node, &module->pmem_regions, list) { + if (paddr >= region_elt->paddr && + paddr < region_elt->paddr + region_elt->len) { + *region = region_elt; + return 0; + } + } + return -1; +} + +int adsp_pmem_paddr_fixup(struct msm_adsp_module *module, void **addr) +{ + struct adsp_pmem_region *region; + unsigned long paddr = (unsigned long)(*addr); + unsigned long *vaddr = (unsigned long *)addr; + int ret; + + ret = adsp_pmem_lookup_paddr(module, addr, ®ion); + if (ret) { + printk(KERN_ERR "adsp: not patching %s, paddr %p lookup failed\n", + module->name, vaddr); + return ret; + } + + *vaddr = (unsigned long)region->vaddr + (paddr - region->paddr); + return 0; +} + +static int adsp_patch_event(struct msm_adsp_module *module, + struct adsp_event *event) +{ + /* call the per-module msg verifier */ + if (module->patch_event) + return module->patch_event(module, event); + return 0; +} + +static long adsp_get_event(struct adsp_device *adev, void __user *arg) +{ + unsigned long flags; + struct adsp_event *data = NULL; + struct adsp_event_t evt; + int timeout; + long rc = 0; + + if (copy_from_user(&evt, arg, sizeof(struct adsp_event_t))) + return -EFAULT; + + timeout = (int)evt.timeout_ms; + + if (timeout > 0) { + rc = wait_event_interruptible_timeout( + adev->event_wait, adsp_events_pending(adev), + msecs_to_jiffies(timeout)); + if (rc == 0) + return -ETIMEDOUT; + } else { + rc = wait_event_interruptible( + adev->event_wait, adsp_events_pending(adev)); + } + if (rc < 0) + return rc; + + if (adev->abort) + return -ENODEV; + + spin_lock_irqsave(&adev->event_queue_lock, flags); + if (!list_empty(&adev->event_queue)) { + data = list_first_entry(&adev->event_queue, + struct adsp_event, list); + list_del(&data->list); + } + spin_unlock_irqrestore(&adev->event_queue_lock, flags); + + if (!data) + return -EAGAIN; + + /* DSP messages are type 0; they may contain physical addresses */ + if (data->type == 0) + adsp_patch_event(adev->module, data); + + /* map adsp_event --> adsp_event_t */ + if (evt.len < data->size) { + rc = -ETOOSMALL; + goto end; + } + if (data->msg_id != EVENT_MSG_ID) { + if (copy_to_user((void *)(evt.data), data->data.msg16, + data->size)) { + rc = -EFAULT; + goto end; + } + } else { + if (copy_to_user((void *)(evt.data), data->data.msg32, + data->size)) { + rc = -EFAULT; + goto end; + } + } + + evt.type = data->type; /* 0 --> from aDSP, 1 --> from ARM9 */ + evt.msg_id = data->msg_id; + evt.flags = data->is16; + evt.len = data->size; + if (copy_to_user(arg, &evt, sizeof(evt))) + rc = -EFAULT; +end: + kfree(data); + return rc; +} + +static long adsp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +{ + struct adsp_device *adev = filp->private_data; + + switch (cmd) { + case ADSP_IOCTL_ENABLE: + return msm_adsp_enable(adev->module); + + case ADSP_IOCTL_DISABLE: + return msm_adsp_disable(adev->module); + + case ADSP_IOCTL_DISABLE_EVENT_RSP: + return 0; + + case ADSP_IOCTL_DISABLE_ACK: + pr_err("adsp: ADSP_IOCTL_DISABLE_ACK is not implemented.\n"); + break; + + case ADSP_IOCTL_WRITE_COMMAND: + return adsp_write_cmd(adev, (void __user *) arg); + + case ADSP_IOCTL_GET_EVENT: + return adsp_get_event(adev, (void __user *) arg); + + case ADSP_IOCTL_SET_CLKRATE: { +#if CONFIG_MSM_AMSS_VERSION==6350 + unsigned long clk_rate; + if (copy_from_user(&clk_rate, (void *) arg, sizeof(clk_rate))) + return -EFAULT; + return adsp_set_clkrate(adev->module, clk_rate); +#endif + } + + case ADSP_IOCTL_REGISTER_PMEM: { + struct adsp_pmem_info info; + if (copy_from_user(&info, (void *) arg, sizeof(info))) + return -EFAULT; + return adsp_pmem_add(adev->module, &info); + } + + case ADSP_IOCTL_ABORT_EVENT_READ: + adev->abort = 1; + wake_up(&adev->event_wait); + break; + + default: + break; + } + return -EINVAL; +} + +static int adsp_release(struct inode *inode, struct file *filp) +{ + struct adsp_device *adev = filp->private_data; + struct msm_adsp_module *module = adev->module; + struct hlist_node *node, *tmp; + struct adsp_pmem_region *region; + + pr_info("adsp_release() '%s'\n", adev->name); + + /* clear module before putting it to avoid race with open() */ + adev->module = NULL; + + mutex_lock(&module->pmem_regions_lock); + hlist_for_each_safe(node, tmp, &module->pmem_regions) { + region = hlist_entry(node, struct adsp_pmem_region, list); + hlist_del(node); + put_pmem_file(region->file); + kfree(region); + } + mutex_unlock(&module->pmem_regions_lock); + BUG_ON(!hlist_empty(&module->pmem_regions)); + + msm_adsp_put(module); + return 0; +} + +static void adsp_event(void *driver_data, unsigned id, size_t len, + void (*getevent)(void *ptr, size_t len)) +{ + struct adsp_device *adev = driver_data; + struct adsp_event *event; + unsigned long flags; + + if (len > ADSP_EVENT_MAX_SIZE) { + pr_err("adsp_event: event too large (%d bytes)\n", len); + return; + } + + event = kmalloc(sizeof(*event), GFP_ATOMIC); + if (!event) { + pr_err("adsp_event: cannot allocate buffer\n"); + return; + } + + if (id != EVENT_MSG_ID) { + event->type = 0; + event->is16 = 0; + event->msg_id = id; + event->size = len; + + getevent(event->data.msg16, len); + } else { + event->type = 1; + event->is16 = 1; + event->msg_id = id; + event->size = len; + getevent(event->data.msg32, len); + } + + spin_lock_irqsave(&adev->event_queue_lock, flags); + list_add_tail(&event->list, &adev->event_queue); + spin_unlock_irqrestore(&adev->event_queue_lock, flags); + wake_up(&adev->event_wait); +} + +static struct msm_adsp_ops adsp_ops = { + .event = adsp_event, +}; + +static int adsp_open(struct inode *inode, struct file *filp) +{ + struct adsp_device *adev; + int rc; + + rc = nonseekable_open(inode, filp); + if (rc < 0) + return rc; + + adev = inode_to_device(inode); + if (!adev) + return -ENODEV; + + pr_info("adsp_open() name = '%s'\n", adev->name); + + rc = msm_adsp_get(adev->name, &adev->module, &adsp_ops, adev); + if (rc) + return rc; + + pr_info("adsp_open() module '%s' adev %p\n", adev->name, adev); + filp->private_data = adev; + adev->abort = 0; + INIT_HLIST_HEAD(&adev->module->pmem_regions); + mutex_init(&adev->module->pmem_regions_lock); + + return 0; +} + +static unsigned adsp_device_count; +static struct adsp_device *adsp_devices; + +static struct adsp_device *inode_to_device(struct inode *inode) +{ + unsigned n = MINOR(inode->i_rdev); + if (n < adsp_device_count) { + if (adsp_devices[n].device) + return adsp_devices + n; + } + return NULL; +} + +static dev_t adsp_devno; +static struct class *adsp_class; + +static struct file_operations adsp_fops = { + .owner = THIS_MODULE, + .open = adsp_open, + .unlocked_ioctl = adsp_ioctl, + .release = adsp_release, +}; + +static void adsp_create(struct adsp_device *adev, const char *name, + struct device *parent, dev_t devt) +{ + struct device *dev; + int rc; + + dev = device_create(adsp_class, parent, devt, "%s", name); + if (IS_ERR(dev)) + return; + + init_waitqueue_head(&adev->event_wait); + INIT_LIST_HEAD(&adev->event_queue); + spin_lock_init(&adev->event_queue_lock); + + cdev_init(&adev->cdev, &adsp_fops); + adev->cdev.owner = THIS_MODULE; + + rc = cdev_add(&adev->cdev, devt, 1); + if (rc < 0) { + device_destroy(adsp_class, devt); + } else { + adev->device = dev; + adev->name = name; + } +} + +void msm_adsp_publish_cdevs(struct msm_adsp_module *modules, unsigned n) +{ + int rc; + + adsp_devices = kzalloc(sizeof(struct adsp_device) * n, GFP_KERNEL); + if (!adsp_devices) + return; + + adsp_class = class_create(THIS_MODULE, "adsp"); + if (IS_ERR(adsp_class)) + goto fail_create_class; + + rc = alloc_chrdev_region(&adsp_devno, 0, n, "adsp"); + if (rc < 0) + goto fail_alloc_region; + + adsp_device_count = n; + for (n = 0; n < adsp_device_count; n++) { + adsp_create(adsp_devices + n, + modules[n].name, &modules[n].pdev.dev, + MKDEV(MAJOR(adsp_devno), n)); + } + + return; + +fail_alloc_region: + class_unregister(adsp_class); +fail_create_class: + kfree(adsp_devices); +} |