Author: imp
Date: Thu Apr 30 20:58:33 2020
New Revision: 360503
URL: https://svnweb.freebsd.org/changeset/base/360503
Log:
Move / reword a comment.
Explain what we're doing with mapping CAM's notion of a LUN to NVMe's
notion of a namespace.
Modified:
head/sys/dev/nvme/nvme_sim.c
Modified: head/sys/dev/nvme/nvme_sim.c
==============================================================================
--- head/sys/dev/nvme/nvme_sim.c Thu Apr 30 19:48:55 2020
(r360502)
+++ head/sys/dev/nvme/nvme_sim.c Thu Apr 30 20:58:33 2020
(r360503)
@@ -172,12 +172,6 @@ nvme_sim_action(struct cam_sim *sim, union ccb *ccb)
struct ccb_pathinq *cpi = &ccb->cpi;
device_t dev = ctrlr->dev;
- /*
- * NVMe may have multiple LUNs on the same path. Current
generation
- * of NVMe devives support only a single name space. Multiple
name
- * space drives are coming, but it's unclear how we should
report
- * them up the stack.
- */
cpi->version_num = 1;
cpi->hba_inquiry = 0;
cpi->target_sprt = 0;
@@ -332,13 +326,17 @@ nvme_sim_new_ns(struct nvme_namespace *ns, void *sc_ar
return (NULL);
}
+ /*
+ * We map the NVMe namespace idea onto the CAM unit LUN. For
+ * each new namespace, we create a new CAM path for it. We then
+ * rescan the path to get it to enumerate.
+ */
if (xpt_create_path(&ccb->ccb_h.path, /*periph*/NULL,
cam_sim_path(sc->s_sim), 0, ns->id) != CAM_REQ_CMP) {
printf("unable to create path for rescan\n");
xpt_free_ccb(ccb);
return (NULL);
}
-
xpt_rescan(ccb);
return (ns);
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