scsi: fc: Update documentation of sysfs nodes for FPIN stats

Update documentation for sysfs nodes within:

       /sys/class/fc_host
       /sys/class/fc_remote_ports

Link: https://lore.kernel.org/r/20201021092715.22669-6-njavali@marvell.com
Reviewed-by: James Smart <james.smart@broadcom.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Shyam Sundar <ssundar@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/Documentation/ABI/testing/sysfs-class-fc_host b/Documentation/ABI/testing/sysfs-class-fc_host
new file mode 100644 (file)
index 0000000..0a696cb
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-fc_host
@@ -0,0 +1,23 @@
+What:          /sys/class/fc_host/hostX/statistics/fpin_cn_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of congestion notification
+               events recorded by the F_Port, reported using fabric
+               performance impact notification (FPIN) event.
+
+What:          /sys/class/fc_host/hostX/statistics/fpin_li_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of link integrity error
+               events recorded by the F_Port/Nx_Port, reported using fabric
+               performance impact notification (FPIN) event.
+
+What:          /sys/class/fc_host/hostX/statistics/fpin_dn_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of delivery related errors
+               recorded by the F_Port/Nx_Port, reported using fabric
+               performance impact notification (FPIN) event.

diff --git a/Documentation/ABI/testing/sysfs-class-fc_remote_ports b/Documentation/ABI/testing/sysfs-class-fc_remote_ports
new file mode 100644 (file)
index 0000000..55a9515
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-fc_remote_ports
@@ -0,0 +1,23 @@
+What:          /sys/class/fc_remote_ports/rport-X:Y-Z/statistics/fpin_cn_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of congestion notification
+               events recorded by the F_Port/Nx_Port, reported using fabric
+               performance impact notification (FPIN) event.
+
+What:          /sys/class/fc_remote_ports/rport-X:Y-Z/statistics/fpin_li_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of link integrity error
+               events recorded by the F_Port/Nx_Port, reported using fabric
+               performance impact notification (FPIN) event.
+
+What:          /sys/class/fc_remote_ports/rport-X:Y-Z/statistics/fpin_dn_yyy
+Date:          July 2020
+Contact:       Shyam Sundar <ssundar@marvell.com>
+Description:
+               These files contain the number of delivery related errors
+               recorded by the F_Port/Nx_Port, reported using fabric
+               performance impact notification (FPIN) event.