blk-mq-dma: add scatter-less integrity data DMA mapping

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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>

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Keith Busch 2025-08-13 08:31:50 -07:00 • committed by Jens Axboe

parent e2be2ba6d2

commit fec9b16dc5

3 changed files with 115 additions and 7 deletions

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104

block/blk-mq-dma.c

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17

include/linux/blk-integrity.h

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1

include/linux/blk-mq-dma.h

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