Date: Mon, 17 Mar 2014 22:37:17 +0000 (UTC) From: Jim Harris <jimharris@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r263278 - head/sys/dev/nvme Message-ID: <201403172237.s2HMbH6l091504@svn.freebsd.org>
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Author: jimharris Date: Mon Mar 17 22:37:17 2014 New Revision: 263278 URL: http://svnweb.freebsd.org/changeset/base/263278 Log: nvme: NVMe specification dictates 4-byte alignment for PRPs (not 8). Sponsored by: Intel MFC after: 3 days Modified: head/sys/dev/nvme/nvme_qpair.c Modified: head/sys/dev/nvme/nvme_qpair.c ============================================================================== --- head/sys/dev/nvme/nvme_qpair.c Mon Mar 17 22:36:04 2014 (r263277) +++ head/sys/dev/nvme/nvme_qpair.c Mon Mar 17 22:37:17 2014 (r263278) @@ -498,8 +498,9 @@ nvme_qpair_construct(struct nvme_qpair * 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);
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