kernel/linux.git/drivers/mmc/core/queue.h, branch v6.6.132

mmc: switch to blk_mq_alloc_disk

2021-06-30T21:34:04+00:00

Use the blk_mq_alloc_disk to allocate the request_queue and gendisk together. Signed-off-by: Christoph Hellwig Reviewed-by: Ulf Hansson Link: https://lore.kernel.org/r/20210616053934.880951-3-hch@lst.de Signed-off-by: Jens Axboe

mmc: core: Remove mq->use_cqe from the struct mmc_queue

2021-03-30T09:42:02+00:00

The host->cqe_enabled is already containing the needed information about whether the CQE is enabled or not, hence there is no need to keep another copy of it around. Signed-off-by: Luca Porzio Signed-off-by: Zhan Liu Link: https://lore.kernel.org/r/20210215003217.GA12240@lupo-laptop Signed-off-by: Ulf Hansson

mmc: queue: Remove unused define

2021-02-08T11:56:52+00:00

MMC_CQE_QUEUE_FULL is not set and is only cleared. Therefore, define is unnecessary. Signed-off-by: ChanWoo Lee Acked-by: Adrian Hunter Link: https://lore.kernel.org/r/20210203072014.30272-1-cw9316.lee@samsung.com Signed-off-by: Ulf Hansson

mmc: stop abusing the request queue_lock pointer

2018-11-17T14:20:45+00:00

Replace the lock in mmc_blk_data that is only used through a pointer in struct mmc_queue and to protect fields in that structure with an actual lock in struct mmc_queue. Suggested-by: Ulf Hansson Reviewed-by: Ulf Hansson Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

mmc: stop abusing the request queue_lock pointer

2018-11-15T19:13:34+00:00

mmc uses the block layer struct request pointer to indirect their own lock to the mmc_queue structure, given that the original lock isn't reachable outside of block.c. Add a lock pointer to struct mmc_queue instead and stop overriding the block layer lock which protects fields entirely separate from the mmc use. Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

mmc: simplify queue initialization

2018-11-15T19:13:32+00:00

Merge three functions initializing the queue into a single one, and drop an unused argument for it. Reviewed-by: Ulf Hansson Reviewed-by: Hannes Reinecke Signed-off-by: Christoph Hellwig Signed-off-by: Jens Axboe

mmc: block: Fix unsupported parallel dispatch of requests

2018-08-21T14:12:41+00:00

The mmc block driver does not support parallel dispatch of requests. In normal circumstances, all requests are anyway funneled through a single work item, so parallel dispatch never happens. However it can happen if there is no elevator. Fix that by detecting if a dispatch is in progress and returning busy (BLK_STS_RESOURCE) in that case Fixes: 81196976ed94 ("mmc: block: Add blk-mq support") Cc: stable@vger.kernel.org # v4.16+ Signed-off-by: Adrian Hunter Signed-off-by: Ulf Hansson

mmc: block: Remove code no longer needed after the switch to blk-mq

2017-12-11T12:02:22+00:00

Remove code no longer needed after the switch to blk-mq. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Tested-by: Linus Walleij Signed-off-by: Ulf Hansson

mmc: block: blk-mq: Add support for direct completion

2017-12-11T11:44:35+00:00

For blk-mq, add support for completing requests directly in the ->done callback. That means that error handling and urgent background operations must be handled by recovery_work in that case. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij

mmc: block: Add CQE support

2017-12-11T11:44:34+00:00

Add CQE support to the block driver, including: - optionally using DCMD for flush requests - "manually" issuing discard requests - issuing read / write requests to the CQE - supporting block-layer timeouts - handling recovery - supporting re-tuning CQE offers 25% - 50% better random multi-threaded I/O. There is a slight (e.g. 2%) drop in sequential read speed but no observable change to sequential write. CQE automatically sends the commands to complete requests. However it only supports reads / writes and so-called "direct commands" (DCMD). Furthermore DCMD is limited to one command at a time, but discards require 3 commands. That makes issuing discards through CQE very awkward, but some CQE's don't support DCMD anyway. So for discards, the existing non-CQE approach is taken, where the mmc core code issues the 3 commands one at a time i.e. mmc_erase(). Where DCMD is used, is for issuing flushes. Signed-off-by: Adrian Hunter Acked-by: Linus Walleij Signed-off-by: Ulf Hansson Tested-by: Linus Walleij