From: Or Har-Toov <redacted>

Add documentation for the port-level resource feature to
devlink-resource.rst. Port-level resources allow viewing resources
associated with specific devlink ports.

Currently, port-level resources only support the show command for
viewing resource information.

Signed-off-by: Or Har-Toov <redacted>
Reviewed-by: Shay Drori <redacted>
Reviewed-by: Moshe Shemesh <redacted>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
---
.../networking/devlink/devlink-resource.rst   | 36 +++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/Documentation/networking/devlink/devlink-resource.rst b/Documentation/networking/devlink/devlink-resource.rst
index 3d5ae51e65a2..4cdfc1dce180 100644
--- a/Documentation/networking/devlink/devlink-resource.rst
+++ b/Documentation/networking/devlink/devlink-resource.rst

@@ -74,3 +74,39 @@ attribute, which represents the pending change in size. For example:

Note that changes in resource size may require a device reload to properly
take effect.
+
+Port-level Resources
+====================
+
+In addition to device-level resources, ``devlink`` also supports port-level
+resources. These resources are associated with a specific devlink port rather
+than the device as a whole.
+
+Currently, port-level resources only support the ``show`` command for viewing
+resource information.
+
+Port-level resources can be viewed for a specific port:
+
+.. code:: shell
+
+    $ devlink port resource show pci/0000:03:00.0/196608
+      pci/0000:03:00.0/196608:
+        name max_sfs size 20 unit entry
+
+Or for ports of a specific device:
+
+.. code:: shell
+
+    $ devlink port resource show pci/0000:03:00.0
+      pci/0000:03:00.0/196608:
+        name max_sfs size 20 unit entry
+
+Or for all ports across all devices:
+
+.. code:: shell
+
+    $ devlink port resource show
+      pci/0000:03:00.0/196608:
+        name max_sfs size 20 unit entry
+      pci/0000:03:00.1/262144:
+        name max_SFs size 20 unit entry