Add unmapped bio support to nvme(4) and nvd(4).

Sponsored by:	Intel

1 files changed, 58 insertions, 0 deletions

diff --git a/sys/dev/nvme/nvme_ns_cmd.c b/sys/dev/nvme/nvme_ns_cmd.c
index 011ce4d..50ec120 100644
--- a/sys/dev/nvme/nvme_ns_cmd.c
+++ b/sys/dev/nvme/nvme_ns_cmd.c
@@ -54,6 +54,35 @@ nvme_ns_cmd_read(struct nvme_namespace *ns, void *payload, uint64_t lba,
 }
 
 int
+nvme_ns_cmd_read_bio(struct nvme_namespace *ns, struct bio *bp,
+    nvme_cb_fn_t cb_fn, void *cb_arg)
+{
+	struct nvme_request	*req;
+	struct nvme_command	*cmd;
+	uint64_t		lba;
+	uint64_t		lba_count;
+
+	req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
+
+	if (req == NULL)
+		return (ENOMEM);
+	cmd = &req->cmd;
+	cmd->opc = NVME_OPC_READ;
+	cmd->nsid = ns->id;
+
+	lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
+	lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
+
+	/* TODO: create a read command data structure */
+	*(uint64_t *)&cmd->cdw10 = lba;
+	cmd->cdw12 = lba_count-1;
+
+	nvme_ctrlr_submit_io_request(ns->ctrlr, req);
+
+	return (0);
+}
+
+int
 nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
     uint32_t lba_count, nvme_cb_fn_t cb_fn, void *cb_arg)
 {
@@ -80,6 +109,35 @@ nvme_ns_cmd_write(struct nvme_namespace *ns, void *payload, uint64_t lba,
 }
 
 int
+nvme_ns_cmd_write_bio(struct nvme_namespace *ns, struct bio *bp,
+    nvme_cb_fn_t cb_fn, void *cb_arg)
+{
+	struct nvme_request	*req;
+	struct nvme_command	*cmd;
+	uint64_t		lba;
+	uint64_t		lba_count;
+
+	req = nvme_allocate_request_bio(bp, cb_fn, cb_arg);
+
+	if (req == NULL)
+		return (ENOMEM);
+	cmd = &req->cmd;
+	cmd->opc = NVME_OPC_WRITE;
+	cmd->nsid = ns->id;
+
+	lba = bp->bio_offset / nvme_ns_get_sector_size(ns);
+	lba_count = bp->bio_bcount / nvme_ns_get_sector_size(ns);
+
+	/* TODO: create a write command data structure */
+	*(uint64_t *)&cmd->cdw10 = lba;
+	cmd->cdw12 = lba_count-1;
+
+	nvme_ctrlr_submit_io_request(ns->ctrlr, req);
+
+	return (0);
+}
+
+int
 nvme_ns_cmd_deallocate(struct nvme_namespace *ns, void *payload,
     uint8_t num_ranges, nvme_cb_fn_t cb_fn, void *cb_arg)
 {