[PATCH v8 3/3] smartpqi: add device attributes

[Don Brace <don.brace@microchip.com>]

Add in some device level sysfs entry descriptions:
lunid
unique_id
path_info
raid_bypass_cnt
sas_ncq_prio_enable

These have already been provided by the driver.

Reviewed-by: Scott Benesh <scott.benesh@microchip.com>
Reviewed-by: Scott Teel <scott.teel@microchip.com>
Reviewed-by: Mike McGowen <mike.mcgowen@microchip.com>
Reviewed-by: Kevin Barnett <kevin.barnett@microchip.com>
Signed-off-by: Don Brace <don.brace@microchip.com>
---
 man4/smartpqi.4 | 95 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)

diff --git a/man4/smartpqi.4 b/man4/smartpqi.4
index 89387c0498fd..00a8146eba6b 100644
--- a/man4/smartpqi.4
+++ b/man4/smartpqi.4
@@ -301,6 +301,101 @@ $ \c
 0
 .EE
 .in
+.TP
+.IR /sys/class/scsi_disk/c : b : t : l/device/lunid
+The
+.I lunid
+attribute is read-only.
+This attribute contains the SCSI LUN ID for the device.
+.IP
+For example:
+.IP
+.in +4n
+.EX
+$ \c
+.B cat /sys/class/scsi_disk/13:1:0:3/device/lunid
+0x0300004000000000
+.EE
+.in
+.TP
+.IR /sys/class/scsi_disk/c : b : t : l/device/unique_id
+The
+.I unique_id
+attribute is read-only.
+This attribute contains a 16-byte ID that uniquely identifies the device
+within the controller.
+.IP
+For example:
+.IP
+.in +4n
+.EX
+$ \c
+.B cat /sys/class/scsi_disk/13:1:0:3/device/unique_id
+600508B1001C6D4723A8E98D704FDB94
+.EE
+.in
+.TP
+.IR /sys/class/scsi_disk/c : b : t : l/device/path_info
+The
+.I path_info
+attribute is read-only.
+This attribute contains the c:b:t:l of the device along with the device
+type and whether the device is Active or Inactive.
+If the device is an HBA device,
+.I path_info
+will also display the PORT, BOX, and BAY the device is plugged into.
+.IP
+For example:
+.IP
+.in +4n
+.EX
+$ \c
+.B cat /sys/class/scsi_disk/13:1:0:3/device/path_info
+[13:1:0:3]    Direct-Access     Active
+
+$ \c
+.B cat /sys/class/scsi_disk/12:0:9:0/device/path_info
+[12:0:9:0]  Direct-Access   PORT: C1 BOX: 1 BAY: 14 Inactive
+[12:0:9:0]  Direct-Access   PORT: C0 BOX: 1 BAY: 14 Active
+.EE
+.in
+.TP
+.IR /sys/class/scsi_disk/13:1:0:3/device/raid_bypass_cnt
+The
+.I raid_bypass_cnt
+attribute is read-only.
+This attribute contains the number of I/O requests that have gone
+through the ioaccel path for ioaccel-enabled volumes.
+See the
+.BI ssd_smart_path_enabled
+disk attribute section for details on ioaccel-enabled volumes.
+.IP
+For example:
+.IP
+.in +4n
+.EX
+$ \c
+.B cat /sys/class/scsi_disk/13:1:0:3/device/raid_bypass_cnt
+0x300
+.EE
+.in
+.TP
+.IR /sys/class/scsi_disk/13:1:0:3/device/sas_ncq_prio_enable
+The
+.I sas_ncq_prio_enable
+attribute is read/write.
+This attribute enables SATA NCQ priority support.
+This attribute works only when device has NCQ support and
+controller firmware can handle IO with NCQ priority attribute.
+.IP
+For example:
+.IP
+.in +4n
+.EX
+$ \c
+.B echo 1 > /sys/class/scsi_disk/13:1:0:3/device/sas_ncq_prio_enable
+.EE
+.in
 .SH VERSIONS
 The
 .B smartpqi
-- 
2.42.0.357.g59167d7d09