Date: Thu, 14 May 2015 21:28:46 +0000 (UTC) From: Jim Harris <jimharris@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r282924 - stable/10/sys/dev/nvme Message-ID: <201505142128.t4ELSkkA063843@svn.freebsd.org>
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Author: jimharris Date: Thu May 14 21:28:46 2015 New Revision: 282924 URL: https://svnweb.freebsd.org/changeset/base/282924 Log: MFC r281281, r281285: nvme: create separate DMA tag for non-payload DMA buffers Submission and completion queue memory need to use a separate DMA tag for mappings than payload buffers, to ensure mappings remain contiguous even with DMAR enabled. Sponsored by: Intel Modified: stable/10/sys/dev/nvme/nvme_private.h stable/10/sys/dev/nvme/nvme_qpair.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/nvme/nvme_private.h ============================================================================== --- stable/10/sys/dev/nvme/nvme_private.h Thu May 14 21:27:31 2015 (r282923) +++ stable/10/sys/dev/nvme/nvme_private.h Thu May 14 21:28:46 2015 (r282924) @@ -211,6 +211,7 @@ struct nvme_qpair { struct nvme_completion *cpl; bus_dma_tag_t dma_tag; + bus_dma_tag_t dma_tag_payload; bus_dmamap_t cmd_dma_map; uint64_t cmd_bus_addr; @@ -491,6 +492,8 @@ nvme_single_map(void *arg, bus_dma_segme { uint64_t *bus_addr = (uint64_t *)arg; + if (error != 0) + printf("nvme_single_map err %d\n", error); *bus_addr = seg[0].ds_addr; } Modified: stable/10/sys/dev/nvme/nvme_qpair.c ============================================================================== --- stable/10/sys/dev/nvme/nvme_qpair.c Thu May 14 21:27:31 2015 (r282923) +++ stable/10/sys/dev/nvme/nvme_qpair.c Thu May 14 21:28:46 2015 (r282924) @@ -294,7 +294,7 @@ nvme_qpair_construct_tracker(struct nvme uint16_t cid) { - bus_dmamap_create(qpair->dma_tag, 0, &tr->payload_dma_map); + bus_dmamap_create(qpair->dma_tag_payload, 0, &tr->payload_dma_map); bus_dmamap_create(qpair->dma_tag, 0, &tr->prp_dma_map); bus_dmamap_load(qpair->dma_tag, tr->prp_dma_map, tr->prp, @@ -337,7 +337,7 @@ nvme_qpair_complete_tracker(struct nvme_ nvme_qpair_submit_tracker(qpair, tr); } else { if (req->type != NVME_REQUEST_NULL) - bus_dmamap_unload(qpair->dma_tag, + bus_dmamap_unload(qpair->dma_tag_payload, tr->payload_dma_map); nvme_free_request(req); @@ -464,6 +464,7 @@ nvme_qpair_construct(struct nvme_qpair * { struct nvme_tracker *tr; uint32_t i; + int err; qpair->id = id; qpair->vector = vector; @@ -497,11 +498,20 @@ 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), + err = bus_dma_tag_create(bus_get_dma_tag(ctrlr->dev), 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_payload); + if (err != 0) + nvme_printf(ctrlr, "payload tag create failed %d\n", err); + + err = bus_dma_tag_create(bus_get_dma_tag(ctrlr->dev), + 4, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, + BUS_SPACE_MAXSIZE, 1, BUS_SPACE_MAXSIZE, 0, NULL, NULL, &qpair->dma_tag); + if (err != 0) + nvme_printf(ctrlr, "tag create failed %d\n", err); qpair->num_cmds = 0; qpair->num_intr_handler_calls = 0; @@ -513,8 +523,13 @@ nvme_qpair_construct(struct nvme_qpair * sizeof(struct nvme_completion), M_NVME, M_ZERO, 0, BUS_SPACE_MAXADDR, PAGE_SIZE, 0); - bus_dmamap_create(qpair->dma_tag, 0, &qpair->cmd_dma_map); - bus_dmamap_create(qpair->dma_tag, 0, &qpair->cpl_dma_map); + err = bus_dmamap_create(qpair->dma_tag, 0, &qpair->cmd_dma_map); + if (err != 0) + nvme_printf(ctrlr, "cmd_dma_map create failed %d\n", err); + + err = bus_dmamap_create(qpair->dma_tag, 0, &qpair->cpl_dma_map); + if (err != 0) + nvme_printf(ctrlr, "cpl_dma_map create failed %d\n", err); bus_dmamap_load(qpair->dma_tag, qpair->cmd_dma_map, qpair->cmd, qpair->num_entries * sizeof(struct nvme_command), @@ -570,6 +585,9 @@ nvme_qpair_destroy(struct nvme_qpair *qp if (qpair->dma_tag) bus_dma_tag_destroy(qpair->dma_tag); + if (qpair->dma_tag_payload) + bus_dma_tag_destroy(qpair->dma_tag_payload); + if (qpair->act_tr) free(qpair->act_tr, M_NVME); @@ -707,8 +725,11 @@ nvme_payload_map(void *arg, bus_dma_segm * is responsible for detecting the error status and failing the * tracker manually. */ - if (error != 0) + if (error != 0) { + nvme_printf(tr->qpair->ctrlr, + "nvme_payload_map err %d\n", error); return; + } /* * Note that we specified PAGE_SIZE for alignment and max @@ -728,6 +749,13 @@ nvme_payload_map(void *arg, bus_dma_segm (uint64_t)seg[cur_nseg].ds_addr; cur_nseg++; } + } else { + /* + * prp2 should not be used by the controller + * since there is only one segment, but set + * to 0 just to be safe. + */ + tr->req->cmd.prp2 = 0; } nvme_qpair_submit_tracker(tr->qpair, tr); @@ -780,8 +808,9 @@ _nvme_qpair_submit_request(struct nvme_q KASSERT(req->payload_size <= qpair->ctrlr->max_xfer_size, ("payload_size (%d) exceeds max_xfer_size (%d)\n", req->payload_size, qpair->ctrlr->max_xfer_size)); - err = bus_dmamap_load(tr->qpair->dma_tag, tr->payload_dma_map, - req->u.payload, req->payload_size, nvme_payload_map, tr, 0); + err = bus_dmamap_load(tr->qpair->dma_tag_payload, + tr->payload_dma_map, req->u.payload, req->payload_size, + nvme_payload_map, tr, 0); if (err != 0) nvme_printf(qpair->ctrlr, "bus_dmamap_load returned 0x%x!\n", err); @@ -795,7 +824,7 @@ _nvme_qpair_submit_request(struct nvme_q ("bio->bio_bcount (%jd) exceeds max_xfer_size (%d)\n", (intmax_t)req->u.bio->bio_bcount, qpair->ctrlr->max_xfer_size)); - err = bus_dmamap_load_bio(tr->qpair->dma_tag, + err = bus_dmamap_load_bio(tr->qpair->dma_tag_payload, tr->payload_dma_map, req->u.bio, nvme_payload_map, tr, 0); if (err != 0) nvme_printf(qpair->ctrlr,
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