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-rw-r--r--share/man/man4/scsi.449
1 files changed, 43 insertions, 6 deletions
diff --git a/share/man/man4/scsi.4 b/share/man/man4/scsi.4
index c4b9cbe9a309..a250fb72a8cf 100644
--- a/share/man/man4/scsi.4
+++ b/share/man/man4/scsi.4
@@ -54,13 +54,17 @@ The
.Nm
subsystem provides a uniform and modular system for the implementation
of drivers to control various
-.Tn SCSI
+.Tn SCSI ,
+.Tn ATA ,
+.Tn NMVe ,
and
-.Tn ATA
+.Tn MMC / SD
devices, and to utilize different
-.Tn SCSI
+.Tn SCSI ,
+.Tn ATA ,
+.Tn NVMe ,
and
-.Tn ATA
+.Tn MMC / SD
host adapters through host adapter drivers.
When the system probes buses, it attaches any devices it finds to the
appropriate drivers.
@@ -213,6 +217,31 @@ and use the first respective counted instances.
These examples can be combined together to allow a peripheral device to be
wired to any particular controller, bus, target, and/or unit instance.
.Pp
+This also works with
+.Xr nvme 4
+drives as well.
+.Bd -literal -offset indent
+hint.nvme.4.at="pci7:0:0"
+hint.scbus.10.at="nvme4"
+hint.nda.10.at="scbus10"
+hint.nda.10.target="1"
+hint.nda.10.unit="12"
+hint.nda.11.at="scbus10"
+hint.nda.11.target="1"
+hint.nda.11.unit="2"
+.Ed
+.Pp
+This assigns the NVMe card living at PCI bus 7 to scbus 10 (in PCIe,
+slot and function are rarely used and usually 0).
+The target for
+.Xr nda 4
+devices is always 1.
+The unit is the namespace identifier from the drive.
+The namespace id 1 is exported as
+.Tn nda10
+and namespace id 2 is exported as
+.Tn nda11 .
+.Pp
When you have a mixture of wired down and counted devices then the
counting begins with the first non-wired down unit for a particular
type.
@@ -225,9 +254,11 @@ The system allows common device drivers to work through many different
types of adapters.
The adapters take requests from the upper layers and do
all IO between the
-.Tn SCSI
+.Tn SCSI ,
+.Tn ATA ,
+.Tn NVMe ,
or
-.Tn ATA
+.Tn MMC / SD
bus and the system.
The maximum size of a transfer is governed by the
adapter.
@@ -322,6 +353,7 @@ for details.
.Xr cd 4 ,
.Xr ch 4 ,
.Xr da 4 ,
+.Xr nvme 4 ,
.Xr pass 4 ,
.Xr pt 4 ,
.Xr sa 4 ,
@@ -351,3 +383,8 @@ The
.Tn ATA
support was added by
.An Alexander Motin Aq Mt mav@FreeBSD.org .
+The
+.Nm
+.Tn NVMe
+support was added by
+.An Warner Losh Aq Mt imp@FreeBSD.org .