diff options
| author | Jim Harris <jimharris@FreeBSD.org> | 2014-03-17 22:37:17 +0000 |
|---|---|---|
| committer | Jim Harris <jimharris@FreeBSD.org> | 2014-03-17 22:37:17 +0000 |
| commit | 1416ef361e009baffeb4556d01e5bfb010873911 (patch) | |
| tree | 73de2cfaddf85c7109110b855df99f3008bf8f5e /sys/dev/nvme/nvme_qpair.c | |
| parent | 2b26030cbc9a63e90d73540e3b96646528fce570 (diff) | |
nvme: NVMe specification dictates 4-byte alignment for PRPs (not 8).
Sponsored by: Intel
MFC after: 3 days
Notes
Notes:
svn path=/head/; revision=263278
Diffstat (limited to 'sys/dev/nvme/nvme_qpair.c')
| -rw-r--r-- | sys/dev/nvme/nvme_qpair.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/dev/nvme/nvme_qpair.c b/sys/dev/nvme/nvme_qpair.c index e6b1e0a8cad1..1ca78cf00a9c 100644 --- a/sys/dev/nvme/nvme_qpair.c +++ b/sys/dev/nvme/nvme_qpair.c @@ -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); |