diff options
| author | Keith Busch <kbusch@kernel.org> | 2025-08-13 08:31:50 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-08-25 07:44:39 -0600 |
| commit | fec9b16dc5550191fd85af118271ea00e8dcc5f8 (patch) | |
| tree | c4ecee09d05f3502a7b4c2c01c1aaf6321b049b4 /include/linux | |
| parent | e2be2ba6d27d5c74f3bd458b64d1ad34a8a75bd8 (diff) | |
blk-mq-dma: add scatter-less integrity data DMA mapping
Similar to regular data, introduce more efficient integrity mapping
helpers that does away with the scatterlist structure. This uses the
block mapping iterator to add IOVA segments if IOMMU is enabled, or maps
directly if not. This also supports P2P segements if integrity data ever
wants to allocate that type of memory.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20250813153153.3260897-7-kbusch@meta.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/blk-integrity.h | 17 | ||||
| -rw-r--r-- | include/linux/blk-mq-dma.h | 1 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/blk-integrity.h b/include/linux/blk-integrity.h index e67a2b6e8f11..78fe2459e661 100644 --- a/include/linux/blk-integrity.h +++ b/include/linux/blk-integrity.h @@ -4,6 +4,7 @@ #include <linux/blk-mq.h> #include <linux/bio-integrity.h> +#include <linux/blk-mq-dma.h> struct request; @@ -31,6 +32,11 @@ int blk_rq_integrity_map_user(struct request *rq, void __user *ubuf, ssize_t bytes); int blk_get_meta_cap(struct block_device *bdev, unsigned int cmd, struct logical_block_metadata_cap __user *argp); +bool blk_rq_integrity_dma_map_iter_start(struct request *req, + struct device *dma_dev, struct dma_iova_state *state, + struct blk_dma_iter *iter); +bool blk_rq_integrity_dma_map_iter_next(struct request *req, + struct device *dma_dev, struct blk_dma_iter *iter); static inline bool blk_integrity_queue_supports_integrity(struct request_queue *q) @@ -115,6 +121,17 @@ static inline int blk_rq_integrity_map_user(struct request *rq, { return -EINVAL; } +static inline bool blk_rq_integrity_dma_map_iter_start(struct request *req, + struct device *dma_dev, struct dma_iova_state *state, + struct blk_dma_iter *iter) +{ + return false; +} +static inline bool blk_rq_integrity_dma_map_iter_next(struct request *req, + struct device *dma_dev, struct blk_dma_iter *iter) +{ + return false; +} static inline struct blk_integrity *bdev_get_integrity(struct block_device *b) { return NULL; diff --git a/include/linux/blk-mq-dma.h b/include/linux/blk-mq-dma.h index 881880095e0d..0f45ea110ca1 100644 --- a/include/linux/blk-mq-dma.h +++ b/include/linux/blk-mq-dma.h @@ -9,6 +9,7 @@ struct blk_map_iter { struct bvec_iter iter; struct bio *bio; struct bio_vec *bvecs; + bool is_integrity; }; struct blk_dma_iter { |