diff options
author | jimharris <jimharris@FreeBSD.org> | 2015-05-14 21:28:46 +0000 |
---|---|---|
committer | jimharris <jimharris@FreeBSD.org> | 2015-05-14 21:28:46 +0000 |
commit | aec45f097e50ea0c6c2a25cad73415fe294b5e4a (patch) | |
tree | 355f847478b8310d9d46d24644008a319b2dcac9 /sys/dev/nvme/nvme_qpair.c | |
parent | 701899b4c60bea7ac2e6131cebeb547762f23317 (diff) | |
download | FreeBSD-src-aec45f097e50ea0c6c2a25cad73415fe294b5e4a.zip FreeBSD-src-aec45f097e50ea0c6c2a25cad73415fe294b5e4a.tar.gz |
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
Diffstat (limited to 'sys/dev/nvme/nvme_qpair.c')
-rw-r--r-- | sys/dev/nvme/nvme_qpair.c | 47 |
1 files changed, 38 insertions, 9 deletions
diff --git a/sys/dev/nvme/nvme_qpair.c b/sys/dev/nvme/nvme_qpair.c index e54adf7..f847ac1 100644 --- a/sys/dev/nvme/nvme_qpair.c +++ b/sys/dev/nvme/nvme_qpair.c @@ -294,7 +294,7 @@ nvme_qpair_construct_tracker(struct nvme_qpair *qpair, struct nvme_tracker *tr, 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_qpair *qpair, struct nvme_tracker *tr, 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 *qpair, uint32_t id, { 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 *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), + 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 *qpair, uint32_t id, 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 *qpair) 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_segment_t *seg, int nseg, int error) * 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_segment_t *seg, int nseg, int error) (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_qpair *qpair, struct nvme_request *req) 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_qpair *qpair, struct nvme_request *req) ("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, |