diff options
Diffstat (limited to 'drivers/mmc')
-rw-r--r-- | drivers/mmc/card/block.c | 109 | ||||
-rw-r--r-- | drivers/mmc/card/queue.c | 129 | ||||
-rw-r--r-- | drivers/mmc/card/queue.h | 31 |
3 files changed, 141 insertions, 128 deletions
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c index bee2106..88bcc4e 100644 --- a/drivers/mmc/card/block.c +++ b/drivers/mmc/card/block.c @@ -427,14 +427,6 @@ static const struct block_device_operations mmc_bdops = { #endif }; -struct mmc_blk_request { - struct mmc_request mrq; - struct mmc_command sbc; - struct mmc_command cmd; - struct mmc_command stop; - struct mmc_data data; -}; - static inline int mmc_blk_part_switch(struct mmc_card *card, struct mmc_blk_data *md) { @@ -824,7 +816,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) { struct mmc_blk_data *md = mq->data; struct mmc_card *card = md->queue.card; - struct mmc_blk_request brq; + struct mmc_blk_request *brq = &mq->mqrq_cur->brq; int ret = 1, disable_multi = 0, retry = 0; /* @@ -839,60 +831,60 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) do { u32 readcmd, writecmd; - memset(&brq, 0, sizeof(struct mmc_blk_request)); - brq.mrq.cmd = &brq.cmd; - brq.mrq.data = &brq.data; + memset(brq, 0, sizeof(struct mmc_blk_request)); + brq->mrq.cmd = &brq->cmd; + brq->mrq.data = &brq->data; - brq.cmd.arg = blk_rq_pos(req); + brq->cmd.arg = blk_rq_pos(req); if (!mmc_card_blockaddr(card)) - brq.cmd.arg <<= 9; - brq.cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; - brq.data.blksz = 512; - brq.stop.opcode = MMC_STOP_TRANSMISSION; - brq.stop.arg = 0; - brq.stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; - brq.data.blocks = blk_rq_sectors(req); + brq->cmd.arg <<= 9; + brq->cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC; + brq->data.blksz = 512; + brq->stop.opcode = MMC_STOP_TRANSMISSION; + brq->stop.arg = 0; + brq->stop.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC; + brq->data.blocks = blk_rq_sectors(req); /* * The block layer doesn't support all sector count * restrictions, so we need to be prepared for too big * requests. */ - if (brq.data.blocks > card->host->max_blk_count) - brq.data.blocks = card->host->max_blk_count; + if (brq->data.blocks > card->host->max_blk_count) + brq->data.blocks = card->host->max_blk_count; /* * After a read error, we redo the request one sector at a time * in order to accurately determine which sectors can be read * successfully. */ - if (disable_multi && brq.data.blocks > 1) - brq.data.blocks = 1; + if (disable_multi && brq->data.blocks > 1) + brq->data.blocks = 1; - if (brq.data.blocks > 1 || do_rel_wr) { + if (brq->data.blocks > 1 || do_rel_wr) { /* SPI multiblock writes terminate using a special * token, not a STOP_TRANSMISSION request. */ if (!mmc_host_is_spi(card->host) || rq_data_dir(req) == READ) - brq.mrq.stop = &brq.stop; + brq->mrq.stop = &brq->stop; readcmd = MMC_READ_MULTIPLE_BLOCK; writecmd = MMC_WRITE_MULTIPLE_BLOCK; } else { - brq.mrq.stop = NULL; + brq->mrq.stop = NULL; readcmd = MMC_READ_SINGLE_BLOCK; writecmd = MMC_WRITE_BLOCK; } if (rq_data_dir(req) == READ) { - brq.cmd.opcode = readcmd; - brq.data.flags |= MMC_DATA_READ; + brq->cmd.opcode = readcmd; + brq->data.flags |= MMC_DATA_READ; } else { - brq.cmd.opcode = writecmd; - brq.data.flags |= MMC_DATA_WRITE; + brq->cmd.opcode = writecmd; + brq->data.flags |= MMC_DATA_WRITE; } if (do_rel_wr) - mmc_apply_rel_rw(&brq, card, req); + mmc_apply_rel_rw(brq, card, req); /* * Pre-defined multi-block transfers are preferable to @@ -914,29 +906,29 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) */ if ((md->flags & MMC_BLK_CMD23) && - mmc_op_multi(brq.cmd.opcode) && + mmc_op_multi(brq->cmd.opcode) && (do_rel_wr || !(card->quirks & MMC_QUIRK_BLK_NO_CMD23))) { - brq.sbc.opcode = MMC_SET_BLOCK_COUNT; - brq.sbc.arg = brq.data.blocks | + brq->sbc.opcode = MMC_SET_BLOCK_COUNT; + brq->sbc.arg = brq->data.blocks | (do_rel_wr ? (1 << 31) : 0); - brq.sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; - brq.mrq.sbc = &brq.sbc; + brq->sbc.flags = MMC_RSP_R1 | MMC_CMD_AC; + brq->mrq.sbc = &brq->sbc; } - mmc_set_data_timeout(&brq.data, card); + mmc_set_data_timeout(&brq->data, card); - brq.data.sg = mq->sg; - brq.data.sg_len = mmc_queue_map_sg(mq); + brq->data.sg = mq->mqrq_cur->sg; + brq->data.sg_len = mmc_queue_map_sg(mq, mq->mqrq_cur); /* * Adjust the sg list so it is the same size as the * request. */ - if (brq.data.blocks != blk_rq_sectors(req)) { - int i, data_size = brq.data.blocks << 9; + if (brq->data.blocks != blk_rq_sectors(req)) { + int i, data_size = brq->data.blocks << 9; struct scatterlist *sg; - for_each_sg(brq.data.sg, sg, brq.data.sg_len, i) { + for_each_sg(brq->data.sg, sg, brq->data.sg_len, i) { data_size -= sg->length; if (data_size <= 0) { sg->length += data_size; @@ -944,14 +936,14 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) break; } } - brq.data.sg_len = i; + brq->data.sg_len = i; } - mmc_queue_bounce_pre(mq); + mmc_queue_bounce_pre(mq->mqrq_cur); - mmc_wait_for_req(card->host, &brq.mrq); + mmc_wait_for_req(card->host, &brq->mrq); - mmc_queue_bounce_post(mq); + mmc_queue_bounce_post(mq->mqrq_cur); /* * sbc.error indicates a problem with the set block count @@ -963,8 +955,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) * stop.error indicates a problem with the stop command. Data * may have been transferred, or may still be transferring. */ - if (brq.sbc.error || brq.cmd.error || brq.stop.error) { - switch (mmc_blk_cmd_recovery(card, req, &brq)) { + if (brq->sbc.error || brq->cmd.error || brq->stop.error) { + switch (mmc_blk_cmd_recovery(card, req, brq)) { case ERR_RETRY: if (retry++ < 5) continue; @@ -980,9 +972,9 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) * initial command - such as address errors. No data * has been transferred. */ - if (brq.cmd.resp[0] & CMD_ERRORS) { + if (brq->cmd.resp[0] & CMD_ERRORS) { pr_err("%s: r/w command failed, status = %#x\n", - req->rq_disk->disk_name, brq.cmd.resp[0]); + req->rq_disk->disk_name, brq->cmd.resp[0]); goto cmd_abort; } @@ -1009,15 +1001,15 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) (R1_CURRENT_STATE(status) == R1_STATE_PRG)); } - if (brq.data.error) { + if (brq->data.error) { pr_err("%s: error %d transferring data, sector %u, nr %u, cmd response %#x, card status %#x\n", - req->rq_disk->disk_name, brq.data.error, + req->rq_disk->disk_name, brq->data.error, (unsigned)blk_rq_pos(req), (unsigned)blk_rq_sectors(req), - brq.cmd.resp[0], brq.stop.resp[0]); + brq->cmd.resp[0], brq->stop.resp[0]); if (rq_data_dir(req) == READ) { - if (brq.data.blocks > 1) { + if (brq->data.blocks > 1) { /* Redo read one sector at a time */ pr_warning("%s: retrying using single block read\n", req->rq_disk->disk_name); @@ -1031,7 +1023,8 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) * read a single sector. */ spin_lock_irq(&md->lock); - ret = __blk_end_request(req, -EIO, brq.data.blksz); + ret = __blk_end_request(req, -EIO, + brq->data.blksz); spin_unlock_irq(&md->lock); continue; } else { @@ -1043,7 +1036,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) * A block was successfully transferred. */ spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, brq.data.bytes_xfered); + ret = __blk_end_request(req, 0, brq->data.bytes_xfered); spin_unlock_irq(&md->lock); } while (ret); @@ -1069,7 +1062,7 @@ static int mmc_blk_issue_rw_rq(struct mmc_queue *mq, struct request *req) } } else { spin_lock_irq(&md->lock); - ret = __blk_end_request(req, 0, brq.data.bytes_xfered); + ret = __blk_end_request(req, 0, brq->data.bytes_xfered); spin_unlock_irq(&md->lock); } diff --git a/drivers/mmc/card/queue.c b/drivers/mmc/card/queue.c index defc11b..9122ff5 100644 --- a/drivers/mmc/card/queue.c +++ b/drivers/mmc/card/queue.c @@ -56,7 +56,7 @@ static int mmc_queue_thread(void *d) spin_lock_irq(q->queue_lock); set_current_state(TASK_INTERRUPTIBLE); req = blk_fetch_request(q); - mq->req = req; + mq->mqrq_cur->req = req; spin_unlock_irq(q->queue_lock); if (!req) { @@ -97,10 +97,25 @@ static void mmc_request(struct request_queue *q) return; } - if (!mq->req) + if (!mq->mqrq_cur->req) wake_up_process(mq->thread); } +struct scatterlist *mmc_alloc_sg(int sg_len, int *err) +{ + struct scatterlist *sg; + + sg = kmalloc(sizeof(struct scatterlist)*sg_len, GFP_KERNEL); + if (!sg) + *err = -ENOMEM; + else { + *err = 0; + sg_init_table(sg, sg_len); + } + + return sg; +} + static void mmc_queue_setup_discard(struct request_queue *q, struct mmc_card *card) { @@ -137,6 +152,7 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, struct mmc_host *host = card->host; u64 limit = BLK_BOUNCE_HIGH; int ret; + struct mmc_queue_req *mqrq_cur = &mq->mqrq[0]; if (mmc_dev(host)->dma_mask && *mmc_dev(host)->dma_mask) limit = *mmc_dev(host)->dma_mask; @@ -146,8 +162,9 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, if (!mq->queue) return -ENOMEM; + memset(&mq->mqrq_cur, 0, sizeof(mq->mqrq_cur)); + mq->mqrq_cur = mqrq_cur; mq->queue->queuedata = mq; - mq->req = NULL; blk_queue_prep_rq(mq->queue, mmc_prep_request); queue_flag_set_unlocked(QUEUE_FLAG_NONROT, mq->queue); @@ -168,53 +185,44 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, bouncesz = host->max_blk_count * 512; if (bouncesz > 512) { - mq->bounce_buf = kmalloc(bouncesz, GFP_KERNEL); - if (!mq->bounce_buf) { + mqrq_cur->bounce_buf = kmalloc(bouncesz, GFP_KERNEL); + if (!mqrq_cur->bounce_buf) { printk(KERN_WARNING "%s: unable to " - "allocate bounce buffer\n", + "allocate bounce cur buffer\n", mmc_card_name(card)); } } - if (mq->bounce_buf) { + if (mqrq_cur->bounce_buf) { blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_ANY); blk_queue_max_hw_sectors(mq->queue, bouncesz / 512); blk_queue_max_segments(mq->queue, bouncesz / 512); blk_queue_max_segment_size(mq->queue, bouncesz); - mq->sg = kmalloc(sizeof(struct scatterlist), - GFP_KERNEL); - if (!mq->sg) { - ret = -ENOMEM; + mqrq_cur->sg = mmc_alloc_sg(1, &ret); + if (ret) goto cleanup_queue; - } - sg_init_table(mq->sg, 1); - mq->bounce_sg = kmalloc(sizeof(struct scatterlist) * - bouncesz / 512, GFP_KERNEL); - if (!mq->bounce_sg) { - ret = -ENOMEM; + mqrq_cur->bounce_sg = + mmc_alloc_sg(bouncesz / 512, &ret); + if (ret) goto cleanup_queue; - } - sg_init_table(mq->bounce_sg, bouncesz / 512); + } } #endif - if (!mq->bounce_buf) { + if (!mqrq_cur->bounce_buf) { blk_queue_bounce_limit(mq->queue, limit); blk_queue_max_hw_sectors(mq->queue, min(host->max_blk_count, host->max_req_size / 512)); blk_queue_max_segments(mq->queue, host->max_segs); blk_queue_max_segment_size(mq->queue, host->max_seg_size); - mq->sg = kmalloc(sizeof(struct scatterlist) * - host->max_segs, GFP_KERNEL); - if (!mq->sg) { - ret = -ENOMEM; + mqrq_cur->sg = mmc_alloc_sg(host->max_segs, &ret); + if (ret) goto cleanup_queue; - } - sg_init_table(mq->sg, host->max_segs); + } sema_init(&mq->thread_sem, 1); @@ -229,16 +237,15 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card, return 0; free_bounce_sg: - if (mq->bounce_sg) - kfree(mq->bounce_sg); - mq->bounce_sg = NULL; + kfree(mqrq_cur->bounce_sg); + mqrq_cur->bounce_sg = NULL; + cleanup_queue: - if (mq->sg) - kfree(mq->sg); - mq->sg = NULL; - if (mq->bounce_buf) - kfree(mq->bounce_buf); - mq->bounce_buf = NULL; + kfree(mqrq_cur->sg); + mqrq_cur->sg = NULL; + kfree(mqrq_cur->bounce_buf); + mqrq_cur->bounce_buf = NULL; + blk_cleanup_queue(mq->queue); return ret; } @@ -247,6 +254,7 @@ void mmc_cleanup_queue(struct mmc_queue *mq) { struct request_queue *q = mq->queue; unsigned long flags; + struct mmc_queue_req *mqrq_cur = mq->mqrq_cur; /* Make sure the queue isn't suspended, as that will deadlock */ mmc_queue_resume(mq); @@ -260,16 +268,14 @@ void mmc_cleanup_queue(struct mmc_queue *mq) blk_start_queue(q); spin_unlock_irqrestore(q->queue_lock, flags); - if (mq->bounce_sg) - kfree(mq->bounce_sg); - mq->bounce_sg = NULL; + kfree(mqrq_cur->bounce_sg); + mqrq_cur->bounce_sg = NULL; - kfree(mq->sg); - mq->sg = NULL; + kfree(mqrq_cur->sg); + mqrq_cur->sg = NULL; - if (mq->bounce_buf) - kfree(mq->bounce_buf); - mq->bounce_buf = NULL; + kfree(mqrq_cur->bounce_buf); + mqrq_cur->bounce_buf = NULL; mq->card = NULL; } @@ -322,27 +328,27 @@ void mmc_queue_resume(struct mmc_queue *mq) /* * Prepare the sg list(s) to be handed of to the host driver */ -unsigned int mmc_queue_map_sg(struct mmc_queue *mq) +unsigned int mmc_queue_map_sg(struct mmc_queue *mq, struct mmc_queue_req *mqrq) { unsigned int sg_len; size_t buflen; struct scatterlist *sg; int i; - if (!mq->bounce_buf) - return blk_rq_map_sg(mq->queue, mq->req, mq->sg); + if (!mqrq->bounce_buf) + return blk_rq_map_sg(mq->queue, mqrq->req, mqrq->sg); - BUG_ON(!mq->bounce_sg); + BUG_ON(!mqrq->bounce_sg); - sg_len = blk_rq_map_sg(mq->queue, mq->req, mq->bounce_sg); + sg_len = blk_rq_map_sg(mq->queue, mqrq->req, mqrq->bounce_sg); - mq->bounce_sg_len = sg_len; + mqrq->bounce_sg_len = sg_len; buflen = 0; - for_each_sg(mq->bounce_sg, sg, sg_len, i) + for_each_sg(mqrq->bounce_sg, sg, sg_len, i) buflen += sg->length; - sg_init_one(mq->sg, mq->bounce_buf, buflen); + sg_init_one(mqrq->sg, mqrq->bounce_buf, buflen); return 1; } @@ -351,31 +357,30 @@ unsigned int mmc_queue_map_sg(struct mmc_queue *mq) * If writing, bounce the data to the buffer before the request * is sent to the host driver */ -void mmc_queue_bounce_pre(struct mmc_queue *mq) +void mmc_queue_bounce_pre(struct mmc_queue_req *mqrq) { - if (!mq->bounce_buf) + if (!mqrq->bounce_buf) return; - if (rq_data_dir(mq->req) != WRITE) + if (rq_data_dir(mqrq->req) != WRITE) return; - sg_copy_to_buffer(mq->bounce_sg, mq->bounce_sg_len, - mq->bounce_buf, mq->sg[0].length); + sg_copy_to_buffer(mqrq->bounce_sg, mqrq->bounce_sg_len, + mqrq->bounce_buf, mqrq->sg[0].length); } /* * If reading, bounce the data from the buffer after the request * has been handled by the host driver */ -void mmc_queue_bounce_post(struct mmc_queue *mq) +void mmc_queue_bounce_post(struct mmc_queue_req *mqrq) { - if (!mq->bounce_buf) + if (!mqrq->bounce_buf) return; - if (rq_data_dir(mq->req) != READ) + if (rq_data_dir(mqrq->req) != READ) return; - sg_copy_from_buffer(mq->bounce_sg, mq->bounce_sg_len, - mq->bounce_buf, mq->sg[0].length); + sg_copy_from_buffer(mqrq->bounce_sg, mqrq->bounce_sg_len, + mqrq->bounce_buf, mqrq->sg[0].length); } - diff --git a/drivers/mmc/card/queue.h b/drivers/mmc/card/queue.h index 6223ef8..c1a69ac 100644 --- a/drivers/mmc/card/queue.h +++ b/drivers/mmc/card/queue.h @@ -4,19 +4,33 @@ struct request; struct task_struct; +struct mmc_blk_request { + struct mmc_request mrq; + struct mmc_command sbc; + struct mmc_command cmd; + struct mmc_command stop; + struct mmc_data data; +}; + +struct mmc_queue_req { + struct request *req; + struct mmc_blk_request brq; + struct scatterlist *sg; + char *bounce_buf; + struct scatterlist *bounce_sg; + unsigned int bounce_sg_len; +}; + struct mmc_queue { struct mmc_card *card; struct task_struct *thread; struct semaphore thread_sem; unsigned int flags; - struct request *req; int (*issue_fn)(struct mmc_queue *, struct request *); void *data; struct request_queue *queue; - struct scatterlist *sg; - char *bounce_buf; - struct scatterlist *bounce_sg; - unsigned int bounce_sg_len; + struct mmc_queue_req mqrq[1]; + struct mmc_queue_req *mqrq_cur; }; extern int mmc_init_queue(struct mmc_queue *, struct mmc_card *, spinlock_t *, @@ -25,8 +39,9 @@ extern void mmc_cleanup_queue(struct mmc_queue *); extern void mmc_queue_suspend(struct mmc_queue *); extern void mmc_queue_resume(struct mmc_queue *); -extern unsigned int mmc_queue_map_sg(struct mmc_queue *); -extern void mmc_queue_bounce_pre(struct mmc_queue *); -extern void mmc_queue_bounce_post(struct mmc_queue *); +extern unsigned int mmc_queue_map_sg(struct mmc_queue *, + struct mmc_queue_req *); +extern void mmc_queue_bounce_pre(struct mmc_queue_req *); +extern void mmc_queue_bounce_post(struct mmc_queue_req *); #endif |