devlink: Document resource scope filtering

Document the scope parameter for devlink resource show, which allows
filtering the dump to device-level or port-level resources only.

Signed-off-by: Or Har-Toov <ohartoov@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://patch.msgid.link/20260407194107.148063-13-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/Documentation/networking/devlink/devlink-resource.rst b/Documentation/networking/devlink/devlink-resource.rst
index 9839c16613151e8f87cef5796419f89e386c6f65..47eec8f875b44b2d9a52de7e4a2fb412f2581768 100644 (file)
--- a/Documentation/networking/devlink/devlink-resource.rst
+++ b/Documentation/networking/devlink/devlink-resource.rst
@@ -109,3 +109,38 @@ To show resources for a specific port:
     $ devlink resource show pci/0000:03:00.0/196608
     pci/0000:03:00.0/196608:
       name max_SFs size 128 unit entry dpipe_tables none
+
+Resource Scope Filtering
+========================
+
+When dumping resources for all devices, ``devlink resource show`` accepts
+an optional ``scope`` parameter to restrict the response to device-level
+resources, port-level resources, or both (the default).
+
+To dump only device-level resources across all devices:
+
+.. code:: shell
+
+    $ devlink resource show scope dev
+    pci/0000:03:00.0:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1:
+      name max_local_SFs size 128 unit entry dpipe_tables none
+      name max_external_SFs size 128 unit entry dpipe_tables none
+
+To dump only port-level resources across all devices:
+
+.. code:: shell
+
+    $ devlink resource show scope port
+    pci/0000:03:00.0/196608:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.0/196609:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196708:
+      name max_SFs size 128 unit entry dpipe_tables none
+    pci/0000:03:00.1/196709:
+      name max_SFs size 128 unit entry dpipe_tables none
+
+Note that port-level resources are read-only.