diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/queue.c | 41 | ||||
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_internal_dmac.c | 2 |
2 files changed, 39 insertions, 4 deletions
diff --git a/drivers/mmc/core/queue.c b/drivers/mmc/core/queue.c index 7102e2ebc614..9edc08685e86 100644 --- a/drivers/mmc/core/queue.c +++ b/drivers/mmc/core/queue.c @@ -21,6 +21,8 @@ #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 */ @@ -193,6 +195,12 @@ static void mmc_queue_setup_discard(struct request_queue *q, 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 @@ -206,7 +214,7 @@ static int __mmc_init_request(struct mmc_queue *mq, struct request *req, struct mmc_card *card = mq->card; struct mmc_host *host = card->host; - mq_rq->sg = mmc_alloc_sg(host->max_segs, gfp); + mq_rq->sg = mmc_alloc_sg(mmc_get_max_segments(host), gfp); if (!mq_rq->sg) return -ENOMEM; @@ -362,13 +370,23 @@ static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) 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)); - blk_queue_max_segments(mq->queue, host->max_segs); + 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); - blk_queue_max_segment_size(mq->queue, + /* + * 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)); @@ -381,6 +399,11 @@ static void mmc_setup_queue(struct mmc_queue *mq, struct mmc_card *card) 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 @@ -418,6 +441,18 @@ int mmc_init_queue(struct mmc_queue *mq, struct mmc_card *card) 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; diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index 751fe91c7571..a66f8d6d61d1 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -106,7 +106,7 @@ static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = { TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2, .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ | MMC_CAP_CMD23, - .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT, + .capabilities2 = MMC_CAP2_NO_WRITE_PROTECT | MMC_CAP2_MERGE_CAPABLE, .bus_shift = 2, .scc_offset = 0x1000, .taps = rcar_gen3_scc_taps, |