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nvme: NVMe specification dictates 4-byte alignment for PRPs (not 8).

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Sponsored by:	Intel
MFC after:	3 days
This commit is contained in:
Jim Harris 2014-03-17 22:37:17 +00:00
parent 2b26030cbc
commit 1416ef361e
1 changed files with 2 additions and 1 deletions
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3
sys/dev/nvme/nvme_qpair.c
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@ -498,8 +498,9 @@ nvme_qpair_construct(struct nvme_qpair *qpair, uint32_t id,
mtx_init(&qpair->lock, "nvme qpair lock", NULL, MTX_DEF);
/* Note: NVMe PRP format is restricted to 4-byte alignment. */
bus_dma_tag_create(bus_get_dma_tag(ctrlr->dev),
sizeof(uint64_t), PAGE_SIZE, BUS_SPACE_MAXADDR,
4, PAGE_SIZE, BUS_SPACE_MAXADDR,
BUS_SPACE_MAXADDR, NULL, NULL, NVME_MAX_XFER_SIZE,
(NVME_MAX_XFER_SIZE/PAGE_SIZE)+1, PAGE_SIZE, 0,
NULL, NULL, &qpair->dma_tag);