// SPDX-License-Identifier: GPL-2.0-only/* * Copyright (C) 2003 Russell King, All Rights Reserved. * Copyright 2006-2007 Pierre Ossman */#include <linux/slab.h>#include <linux/module.h>#include <linux/blkdev.h>#include <linux/freezer.h>#include <linux/kthread.h>#include <linux/scatterlist.h>#include <linux/dma-mapping.h>#include <linux/backing-dev.h> #include <linux/mmc/card.h>#include <linux/mmc/host.h> #include "queue.h"#include "block.h"#include "core.h"#include "card.h"#include "host.h" #define MMC_DMA_MAP_MERGE_SEGMENTS 512 static inline bool mmc_cqe_dcmd_busy(struct mmc_queue *mq){ /* Allow only 1 DCMD at a time */ return mq->in_flight[MMC_ISSUE_DCMD];} void mmc_cqe_check_busy(struct mmc_queue *mq){ if ((mq->cqe_busy & MMC_CQE_DCMD_BUSY) && !mmc_cqe_dcmd_busy(mq)) mq->cqe_busy &= ~MMC_CQE_DCMD_BUSY; mq->cqe_busy &= ~MMC_CQE_QUEUE_FULL;} static inline bool mmc_cqe_can_dcmd(struct mmc_host *host){ return host->caps2 & MMC_CAP2_CQE_DCMD;} static enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host, struct request *req){ switch (req_op(req)) { case REQ_OP_DRV_IN: case REQ_OP_DRV_OUT: case REQ_OP_DISCARD: case REQ_OP_SECURE_ERASE: return MMC_ISSUE_SYNC; case REQ_OP_FLUSH: return mmc_cqe_can_dcmd(host) ? MMC_ISSUE_DCMD : MMC_ISSUE_SYNC; default: return MMC_ISSUE_ASYNC; }} enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req){ struct mmc_host *host = mq->card->host; if (mq->use_cqe) return mmc_cqe_issue_type(host, req); if (req_op(req) == REQ_OP_READ || req_op(req) == REQ_OP_WRITE) return MMC_ISSUE_ASYNC; return MMC_ISSUE_SYNC;} static void __mmc_cqe_recovery_notifier(struct mmc_queue *mq){ if (!mq->recovery_needed) { mq->recovery_needed = true; schedule_work(&mq->recovery_work); }} void mmc_cqe_recovery_notifier(struct mmc_request *mrq){ struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, brq.mrq); struct request *req = mmc_queue_req_to_req(mqrq); struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; unsigned long flags; spin_lock_irqsave(&mq->lock, flags); __mmc_cqe_recovery_notifier(mq); spin_unlock_irqrestore(&mq->lock, flags);} static enum blk_eh_timer_return mmc_cqe_timed_out(struct request *req){ struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); struct mmc_request *mrq = &mqrq->brq.mrq; struct mmc_queue *mq = req->q->queuedata; struct mmc_host *host = mq->card->host; enum mmc_issue_type issue_type = mmc_issue_type(mq, req); bool recovery_needed = false; switch (issue_type) { case MMC_ISSUE_ASYNC: case MMC_ISSUE_DCMD: if (host->cqe_ops->cqe_timeout(host, mrq, &recovery_needed)) { if (recovery_needed) __mmc_cqe_recovery_notifier(mq); return BLK_EH_RESET_TIMER; } /* No timeout (XXX: huh? comment doesn't make much sense) */ blk_mq_complete_request(req); return BLK_EH_DONE; default: /* Timeout is handled by mmc core */ return BLK_EH_RESET_TIMER; }} static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req, bool reserved){ struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; unsigned long flags; int ret; spin_lock_irqsave(&mq->lock, flags); if (mq->recovery_needed || !mq->use_cqe) ret = BLK_EH_RESET_TIMER; else ret = mmc_cqe_timed_out(req); spin_unlock_irqrestore(&mq->lock, flags); return ret;} static void mmc_mq_recovery_handler(struct work_struct *work){ struct mmc_queue *mq = container_of(work, struct mmc_queue, recovery_work); struct request_queue *q = mq->queue; mmc_get_card(mq->card, &mq->ctx); mq->in_recovery = true; if (mq->use_cqe) mmc_blk_cqe_recovery(mq); else mmc_blk_mq_recovery(mq); mq->in_recovery = false; spin_lock_irq(&mq->lock); mq->recovery_needed = false; spin_unlock_irq(&mq->lock); mmc_put_card(mq->card, &mq->ctx); blk_mq_run_hw_queues(q, true);} static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp){ struct scatterlist *sg; sg = kmalloc_array(sg_len, sizeof(*sg), gfp); if (sg) sg_init_table(sg, sg_len); return sg;} static void mmc_queue_setup_discard(struct request_queue *q, struct mmc_card *card){ unsigned max_discard; max_discard = mmc_calc_max_discard(card); if (!max_discard) return; blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); blk_queue_max_discard_sectors(q, max_discard); q->limits.discard_granularity = card->pref_erase << 9; /* granularity must not be greater than max. discard */ if (card->pref_erase > max_discard) q->limits.discard_granularity = 0; if (mmc_can_secure_erase_trim(card)) blk_queue_flag_set(QUEUE_FLAG_SECERASE, q);} static unsigned int mmc_get_max_segments(struct mmc_host *host){ return host->can_dma_map_merge ? MMC_DMA_MAP_MERGE_SEGMENTS : host->max_segs;} /** * mmc_init_request() - initialize the MMC-specific per-request data * @q: the request queue * @req: the request * @gfp: memory allocation policy */static int __mmc_init_request(struct mmc_queue *mq, struct request *req, gfp_t gfp){ struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req); struct mmc_card *card = mq->card; struct mmc_host *host = card->host; mq_rq->sg = mmc_alloc_sg(mmc_get_max_segments(host), gfp); if (!mq_rq->sg) return -ENOMEM; return 0;} static void mmc_exit_request(struct request_queue *q, struct request *req){ struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req); kfree(mq_rq->sg); mq_rq->sg = NULL;} static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req, unsigned int hctx_idx, unsigned int numa_node){ return __mmc_init_request(set->driver_data, req, GFP_KERNEL);} static void mmc_mq_exit_request(struct blk_mq_tag_set *set, struct request *req, unsigned int hctx_idx){ struct mmc_queue *mq = set->driver_data; mmc_exit_request(mq->queue, req);} static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd){ struct request *req = bd->rq; struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; struct mmc_card *card = mq->card; struct mmc_host *host = card->host; enum mmc_issue_type issue_type; enum mmc_issued issued; bool get_card, cqe_retune_ok; int ret; if (mmc_card_removed(mq->card)) { req->rq_flags |= RQF_QUIET; return BLK_STS_IOERR; } issue_type = mmc_issue_type(mq, req); spin_lock_irq(&mq->lock); if (mq->recovery_needed || mq->busy) { spin_unlock_irq(&mq->lock); return BLK_STS_RESOURCE; } switch (issue_type) { case MMC_ISSUE_DCMD: if (mmc_cqe_dcmd_busy(mq)) { mq->cqe_busy |= MMC_CQE_DCMD_BUSY; spin_unlock_irq(&mq->lock); return BLK_STS_RESOURCE; } break; case MMC_ISSUE_ASYNC: break; default: /* * Timeouts are handled by mmc core, and we don't have a host * API to abort requests, so we can't handle the timeout anyway. * However, when the timeout happens, blk_mq_complete_request() * no longer works (to stop the request disappearing under us). * To avoid racing with that, set a large timeout. */ req->timeout = 600 * HZ; break; } /* Parallel dispatch of requests is not supported at the moment */ mq->busy = true; mq->in_flight[issue_type] += 1; get_card = (mmc_tot_in_flight(mq) == 1); cqe_retune_ok = (mmc_cqe_qcnt(mq) == 1); spin_unlock_irq(&mq->lock); if (!(req->rq_flags & RQF_DONTPREP)) { req_to_mmc_queue_req(req)->retries = 0; req->rq_flags |= RQF_DONTPREP; } if (get_card) mmc_get_card(card, &mq->ctx); if (mq->use_cqe) { host->retune_now = host->need_retune && cqe_retune_ok && !host->hold_retune; } blk_mq_start_request(req); issued = mmc_blk_mq_issue_rq(mq, req); switch (issued) { case MMC_REQ_BUSY: ret = BLK_STS_RESOURCE; break; case MMC_REQ_FAILED_TO_START: ret = BLK_STS_IOERR; break; default: ret = BLK_STS_OK; break; } if (issued != MMC_REQ_STARTED) { bool put_card = false; spin_lock_irq(&mq->lock); mq->in_flight[issue_type] -= 1; if (mmc_tot_in_flight(mq) == 0) put_card = true; mq->busy = false; spin_unlock_irq(&mq->lock); if (put_card) mmc_put_card(card, &mq->ctx); } else { WRITE_ONCE(mq->busy, false); } return ret;} static const struct blk_mq_ops mmc_mq_ops = { .queue_rq = mmc_mq_queue_rq, .init_request = mmc_mq_init_request, .exit_request = mmc_mq_exit_request, .complete = mmc_blk_mq_complete, .timeout = mmc_mq_timed_out,}; static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card){ struct mmc_host *host = card->host; unsigned block_size = 512; blk_queue_flag_set(QUEUE_FLAG_NONROT, mq->queue); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, mq->queue); if (mmc_can_erase(card)) mmc_queue_setup_discard(mq->queue, card); if (!mmc_dev(host)->dma_mask || !*mmc_dev(host)->dma_mask) blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH); blk_queue_max_hw_sectors(mq->queue, min(host->max_blk_count, host->max_req_size / 512)); if (host->can_dma_map_merge) WARN(!blk_queue_can_use_dma_map_merging(mq->queue, mmc_dev(host)), "merging was advertised but not possible"); blk_queue_max_segments(mq->queue, mmc_get_max_segments(host)); if (mmc_card_mmc(card)) block_size = card->ext_csd.data_sector_size; blk_queue_logical_block_size(mq->queue, block_size); /* * After blk_queue_can_use_dma_map_merging() was called with succeed, * since it calls blk_queue_virt_boundary(), the mmc should not call * both blk_queue_max_segment_size(). */ if (!host->can_dma_map_merge) blk_queue_max_segment_size(mq->queue, round_down(host->max_seg_size, block_size)); dma_set_max_seg_size(mmc_dev(host), queue_max_segment_size(mq->queue)); INIT_WORK(&mq->recovery_work, mmc_mq_recovery_handler); INIT_WORK(&mq->complete_work, mmc_blk_mq_complete_work); mutex_init(&mq->complete_lock); init_waitqueue_head(&mq->wait);} static inline bool mmc_merge_capable(struct mmc_host *host){ return host->caps2 & MMC_CAP2_MERGE_CAPABLE;} /* Set queue depth to get a reasonable value for q->nr_requests */#define MMC_QUEUE_DEPTH 64 /** * mmc_init_queue - initialise a queue structure. * @mq: mmc queue * @card: mmc card to attach this queue * * Initialise a MMC card request queue. */int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card){ struct mmc_host *host = card->host; int ret; mq->card = card; mq->use_cqe = host->cqe_enabled; spin_lock_init(&mq->lock); memset(&mq->tag_set, 0, sizeof(mq->tag_set)); mq->tag_set.ops = &mmc_mq_ops; /* * The queue depth for CQE must match the hardware because the request * tag is used to index the hardware queue. */ if (mq->use_cqe) mq->tag_set.queue_depth = min_t(int, card->ext_csd.cmdq_depth, host->cqe_qdepth); else mq->tag_set.queue_depth = MMC_QUEUE_DEPTH; mq->tag_set.numa_node = NUMA_NO_NODE; mq->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; mq->tag_set.nr_hw_queues = 1; mq->tag_set.cmd_size = sizeof(struct mmc_queue_req); mq->tag_set.driver_data = mq; /* * Since blk_mq_alloc_tag_set() calls .init_request() of mmc_mq_ops, * the host->can_dma_map_merge should be set before to get max_segs * from mmc_get_max_segments(). */ if (mmc_merge_capable(host) && host->max_segs < MMC_DMA_MAP_MERGE_SEGMENTS && dma_get_merge_boundary(mmc_dev(host))) host->can_dma_map_merge = 1; else host->can_dma_map_merge = 0; ret = blk_mq_alloc_tag_set(&mq->tag_set); if (ret) return ret; mq->queue = blk_mq_init_queue(&mq->tag_set); if (IS_ERR(mq->queue)) { ret = PTR_ERR(mq->queue); goto free_tag_set; } if (mmc_host_is_spi(host) && host->use_spi_crc) mq->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; mq->queue->queuedata = mq; blk_queue_rq_timeout(mq->queue, 60 * HZ); mmc_setup_queue(mq, card); return 0; free_tag_set: blk_mq_free_tag_set(&mq->tag_set); return ret;} void mmc_queue_suspend(struct mmc_queue *mq){ blk_mq_quiesce_queue(mq->queue); /* * The host remains claimed while there are outstanding requests, so * simply claiming and releasing here ensures there are none. */ mmc_claim_host(mq->card->host); mmc_release_host(mq->card->host);} void mmc_queue_resume(struct mmc_queue *mq){ blk_mq_unquiesce_queue(mq->queue);} void mmc_cleanup_queue(struct mmc_queue *mq){ struct request_queue *q = mq->queue;Lines 1–500 of 530. 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// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2003 Russell King, All Rights Reserved. * Copyright 2006-2007 Pierre Ossman */ #include <linux/slab.h> #include <linux/module.h> #include <linux/blkdev.h> #include <linux/freezer.h> #include <linux/kthread.h> #include <linux/scatterlist.h> #include <linux/dma-mapping.h> #include <linux/backing-dev.h> #include <linux/mmc/card.h> #include <linux/mmc/host.h> #include "queue.h" #include "block.h" #include "core.h" #include "card.h" #include "host.h" #define MMC_DMA_MAP_MERGE_SEGMENTS 512 static inline bool mmc_cqe_dcmd_busy(struct mmc_queue *mq) { /* Allow only 1 DCMD at a time */ return mq->in_flight[MMC_ISSUE_DCMD]; } void mmc_cqe_check_busy(struct mmc_queue *mq) { if ((mq->cqe_busy & MMC_CQE_DCMD_BUSY) && !mmc_cqe_dcmd_busy(mq)) mq->cqe_busy &= ~MMC_CQE_DCMD_BUSY; mq->cqe_busy &= ~MMC_CQE_QUEUE_FULL; } static inline bool mmc_cqe_can_dcmd(struct mmc_host *host) { return host->caps2 & MMC_CAP2_CQE_DCMD; } static enum mmc_issue_type mmc_cqe_issue_type(struct mmc_host *host, struct request *req) { switch (req_op(req)) { case REQ_OP_DRV_IN: case REQ_OP_DRV_OUT: case REQ_OP_DISCARD: case REQ_OP_SECURE_ERASE: return MMC_ISSUE_SYNC; case REQ_OP_FLUSH: return mmc_cqe_can_dcmd(host) ? MMC_ISSUE_DCMD : MMC_ISSUE_SYNC; default: return MMC_ISSUE_ASYNC; } } enum mmc_issue_type mmc_issue_type(struct mmc_queue *mq, struct request *req) { struct mmc_host *host = mq->card->host; if (mq->use_cqe) return mmc_cqe_issue_type(host, req); if (req_op(req) == REQ_OP_READ || req_op(req) == REQ_OP_WRITE) return MMC_ISSUE_ASYNC; return MMC_ISSUE_SYNC; } static void __mmc_cqe_recovery_notifier(struct mmc_queue *mq) { if (!mq->recovery_needed) { mq->recovery_needed = true; schedule_work(&mq->recovery_work); } } void mmc_cqe_recovery_notifier(struct mmc_request *mrq) { struct mmc_queue_req *mqrq = container_of(mrq, struct mmc_queue_req, brq.mrq); struct request *req = mmc_queue_req_to_req(mqrq); struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; unsigned long flags; spin_lock_irqsave(&mq->lock, flags); __mmc_cqe_recovery_notifier(mq); spin_unlock_irqrestore(&mq->lock, flags); } static enum blk_eh_timer_return mmc_cqe_timed_out(struct request *req) { struct mmc_queue_req *mqrq = req_to_mmc_queue_req(req); struct mmc_request *mrq = &mqrq->brq.mrq; struct mmc_queue *mq = req->q->queuedata; struct mmc_host *host = mq->card->host; enum mmc_issue_type issue_type = mmc_issue_type(mq, req); bool recovery_needed = false; switch (issue_type) { case MMC_ISSUE_ASYNC: case MMC_ISSUE_DCMD: if (host->cqe_ops->cqe_timeout(host, mrq, &recovery_needed)) { if (recovery_needed) __mmc_cqe_recovery_notifier(mq); return BLK_EH_RESET_TIMER; } /* No timeout (XXX: huh? comment doesn't make much sense) */ blk_mq_complete_request(req); return BLK_EH_DONE; default: /* Timeout is handled by mmc core */ return BLK_EH_RESET_TIMER; } } static enum blk_eh_timer_return mmc_mq_timed_out(struct request *req, bool reserved) { struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; unsigned long flags; int ret; spin_lock_irqsave(&mq->lock, flags); if (mq->recovery_needed || !mq->use_cqe) ret = BLK_EH_RESET_TIMER; else ret = mmc_cqe_timed_out(req); spin_unlock_irqrestore(&mq->lock, flags); return ret; } static void mmc_mq_recovery_handler(struct work_struct *work) { struct mmc_queue *mq = container_of(work, struct mmc_queue, recovery_work); struct request_queue *q = mq->queue; mmc_get_card(mq->card, &mq->ctx); mq->in_recovery = true; if (mq->use_cqe) mmc_blk_cqe_recovery(mq); else mmc_blk_mq_recovery(mq); mq->in_recovery = false; spin_lock_irq(&mq->lock); mq->recovery_needed = false; spin_unlock_irq(&mq->lock); mmc_put_card(mq->card, &mq->ctx); blk_mq_run_hw_queues(q, true); } static struct scatterlist *mmc_alloc_sg(int sg_len, gfp_t gfp) { struct scatterlist *sg; sg = kmalloc_array(sg_len, sizeof(*sg), gfp); if (sg) sg_init_table(sg, sg_len); return sg; } static void mmc_queue_setup_discard(struct request_queue *q, struct mmc_card *card) { unsigned max_discard; max_discard = mmc_calc_max_discard(card); if (!max_discard) return; blk_queue_flag_set(QUEUE_FLAG_DISCARD, q); blk_queue_max_discard_sectors(q, max_discard); q->limits.discard_granularity = card->pref_erase << 9; /* granularity must not be greater than max. discard */ if (card->pref_erase > max_discard) q->limits.discard_granularity = 0; if (mmc_can_secure_erase_trim(card)) blk_queue_flag_set(QUEUE_FLAG_SECERASE, q); } static unsigned int mmc_get_max_segments(struct mmc_host *host) { return host->can_dma_map_merge ? MMC_DMA_MAP_MERGE_SEGMENTS : host->max_segs; } /** * mmc_init_request() - initialize the MMC-specific per-request data * @q: the request queue * @req: the request * @gfp: memory allocation policy */ static int __mmc_init_request(struct mmc_queue *mq, struct request *req, gfp_t gfp) { struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req); struct mmc_card *card = mq->card; struct mmc_host *host = card->host; mq_rq->sg = mmc_alloc_sg(mmc_get_max_segments(host), gfp); if (!mq_rq->sg) return -ENOMEM; return 0; } static void mmc_exit_request(struct request_queue *q, struct request *req) { struct mmc_queue_req *mq_rq = req_to_mmc_queue_req(req); kfree(mq_rq->sg); mq_rq->sg = NULL; } static int mmc_mq_init_request(struct blk_mq_tag_set *set, struct request *req, unsigned int hctx_idx, unsigned int numa_node) { return __mmc_init_request(set->driver_data, req, GFP_KERNEL); } static void mmc_mq_exit_request(struct blk_mq_tag_set *set, struct request *req, unsigned int hctx_idx) { struct mmc_queue *mq = set->driver_data; mmc_exit_request(mq->queue, req); } static blk_status_t mmc_mq_queue_rq(struct blk_mq_hw_ctx *hctx, const struct blk_mq_queue_data *bd) { struct request *req = bd->rq; struct request_queue *q = req->q; struct mmc_queue *mq = q->queuedata; struct mmc_card *card = mq->card; struct mmc_host *host = card->host; enum mmc_issue_type issue_type; enum mmc_issued issued; bool get_card, cqe_retune_ok; int ret; if (mmc_card_removed(mq->card)) { req->rq_flags |= RQF_QUIET; return BLK_STS_IOERR; } issue_type = mmc_issue_type(mq, req); spin_lock_irq(&mq->lock); if (mq->recovery_needed || mq->busy) { spin_unlock_irq(&mq->lock); return BLK_STS_RESOURCE; } switch (issue_type) { case MMC_ISSUE_DCMD: if (mmc_cqe_dcmd_busy(mq)) { mq->cqe_busy |= MMC_CQE_DCMD_BUSY; spin_unlock_irq(&mq->lock); return BLK_STS_RESOURCE; } break; case MMC_ISSUE_ASYNC: break; default: /* * Timeouts are handled by mmc core, and we don't have a host * API to abort requests, so we can't handle the timeout anyway. * However, when the timeout happens, blk_mq_complete_request() * no longer works (to stop the request disappearing under us). * To avoid racing with that, set a large timeout. */ req->timeout = 600 * HZ; break; } /* Parallel dispatch of requests is not supported at the moment */ mq->busy = true; mq->in_flight[issue_type] += 1; get_card = (mmc_tot_in_flight(mq) == 1); cqe_retune_ok = (mmc_cqe_qcnt(mq) == 1); spin_unlock_irq(&mq->lock); if (!(req->rq_flags & RQF_DONTPREP)) { req_to_mmc_queue_req(req)->retries = 0; req->rq_flags |= RQF_DONTPREP; } if (get_card) mmc_get_card(card, &mq->ctx); if (mq->use_cqe) { host->retune_now = host->need_retune && cqe_retune_ok && !host->hold_retune; } blk_mq_start_request(req); issued = mmc_blk_mq_issue_rq(mq, req); switch (issued) { case MMC_REQ_BUSY: ret = BLK_STS_RESOURCE; break; case MMC_REQ_FAILED_TO_START: ret = BLK_STS_IOERR; break; default: ret = BLK_STS_OK; break; } if (issued != MMC_REQ_STARTED) { bool put_card = false; spin_lock_irq(&mq->lock); mq->in_flight[issue_type] -= 1; if (mmc_tot_in_flight(mq) == 0) put_card = true; mq->busy = false; spin_unlock_irq(&mq->lock); if (put_card) mmc_put_card(card, &mq->ctx); } else { WRITE_ONCE(mq->busy, false); } return ret; } static const struct blk_mq_ops mmc_mq_ops = { .queue_rq = mmc_mq_queue_rq, .init_request = mmc_mq_init_request, .exit_request = mmc_mq_exit_request, .complete = mmc_blk_mq_complete, .timeout = mmc_mq_timed_out, }; static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) { struct mmc_host *host = card->host; unsigned block_size = 512; blk_queue_flag_set(QUEUE_FLAG_NONROT, mq->queue); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, mq->queue); if (mmc_can_erase(card)) mmc_queue_setup_discard(mq->queue, card); if (!mmc_dev(host)->dma_mask || !*mmc_dev(host)->dma_mask) blk_queue_bounce_limit(mq->queue, BLK_BOUNCE_HIGH); blk_queue_max_hw_sectors(mq->queue, min(host->max_blk_count, host->max_req_size / 512)); if (host->can_dma_map_merge) WARN(!blk_queue_can_use_dma_map_merging(mq->queue, mmc_dev(host)), "merging was advertised but not possible"); blk_queue_max_segments(mq->queue, mmc_get_max_segments(host)); if (mmc_card_mmc(card)) block_size = card->ext_csd.data_sector_size; blk_queue_logical_block_size(mq->queue, block_size); /* * After blk_queue_can_use_dma_map_merging() was called with succeed, * since it calls blk_queue_virt_boundary(), the mmc should not call * both blk_queue_max_segment_size(). */ if (!host->can_dma_map_merge) blk_queue_max_segment_size(mq->queue, round_down(host->max_seg_size, block_size)); dma_set_max_seg_size(mmc_dev(host), queue_max_segment_size(mq->queue)); INIT_WORK(&mq->recovery_work, mmc_mq_recovery_handler); INIT_WORK(&mq->complete_work, mmc_blk_mq_complete_work); mutex_init(&mq->complete_lock); init_waitqueue_head(&mq->wait); } static inline bool mmc_merge_capable(struct mmc_host *host) { return host->caps2 & MMC_CAP2_MERGE_CAPABLE; } /* Set queue depth to get a reasonable value for q->nr_requests */ #define MMC_QUEUE_DEPTH 64 /** * mmc_init_queue - initialise a queue structure. * @mq: mmc queue * @card: mmc card to attach this queue * * Initialise a MMC card request queue. */ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card) { struct mmc_host *host = card->host; int ret; mq->card = card; mq->use_cqe = host->cqe_enabled; spin_lock_init(&mq->lock); memset(&mq->tag_set, 0, sizeof(mq->tag_set)); mq->tag_set.ops = &mmc_mq_ops; /* * The queue depth for CQE must match the hardware because the request * tag is used to index the hardware queue. */ if (mq->use_cqe) mq->tag_set.queue_depth = min_t(int, card->ext_csd.cmdq_depth, host->cqe_qdepth); else mq->tag_set.queue_depth = MMC_QUEUE_DEPTH; mq->tag_set.numa_node = NUMA_NO_NODE; mq->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING; mq->tag_set.nr_hw_queues = 1; mq->tag_set.cmd_size = sizeof(struct mmc_queue_req); mq->tag_set.driver_data = mq; /* * Since blk_mq_alloc_tag_set() calls .init_request() of mmc_mq_ops, * the host->can_dma_map_merge should be set before to get max_segs * from mmc_get_max_segments(). */ if (mmc_merge_capable(host) && host->max_segs < MMC_DMA_MAP_MERGE_SEGMENTS && dma_get_merge_boundary(mmc_dev(host))) host->can_dma_map_merge = 1; else host->can_dma_map_merge = 0; ret = blk_mq_alloc_tag_set(&mq->tag_set); if (ret) return ret; mq->queue = blk_mq_init_queue(&mq->tag_set); if (IS_ERR(mq->queue)) { ret = PTR_ERR(mq->queue); goto free_tag_set; } if (mmc_host_is_spi(host) && host->use_spi_crc) mq->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES; mq->queue->queuedata = mq; blk_queue_rq_timeout(mq->queue, 60 * HZ); mmc_setup_queue(mq, card); return 0; free_tag_set: blk_mq_free_tag_set(&mq->tag_set); return ret; } void mmc_queue_suspend(struct mmc_queue *mq) { blk_mq_quiesce_queue(mq->queue); /* * The host remains claimed while there are outstanding requests, so * simply claiming and releasing here ensures there are none. */ mmc_claim_host(mq->card->host); mmc_release_host(mq->card->host); } void mmc_queue_resume(struct mmc_queue *mq) { blk_mq_unquiesce_queue(mq->queue); } void mmc_cleanup_queue(struct mmc_queue *mq) { struct request_queue *q = mq->queue;