net/mlx5e: Add devlink hairpin queues parameters

[linux-2.6-microblaze.git] / Documentation / networking / device_drivers / ethernet / mellanox / mlx5 / devlink.rst

diff --git a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
index 9b5c40b..0995e4e 100644 (file)
--- a/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
+++ b/Documentation/networking/device_drivers/ethernet/mellanox/mlx5/devlink.rst
@@ -122,6 +122,41 @@ users try to enable them.
 
     $ devlink dev eswitch set pci/0000:06:00.0 mode switchdev
 
+hairpin_num_queues: Number of hairpin queues
+--------------------------------------------
+We refer to a TC NIC rule that involves forwarding as "hairpin".
+
+Hairpin queues are mlx5 hardware specific implementation for hardware
+forwarding of such packets.
+
+- Show the number of hairpin queues::
+
+    $ devlink dev param show pci/0000:06:00.0 name hairpin_num_queues
+      pci/0000:06:00.0:
+        name hairpin_num_queues type driver-specific
+          values:
+            cmode driverinit value 2
+
+- Change the number of hairpin queues::
+
+    $ devlink dev param set pci/0000:06:00.0 name hairpin_num_queues value 4 cmode driverinit
+
+hairpin_queue_size: Size of the hairpin queues
+----------------------------------------------
+Control the size of the hairpin queues.
+
+- Show the size of the hairpin queues::
+
+    $ devlink dev param show pci/0000:06:00.0 name hairpin_queue_size
+      pci/0000:06:00.0:
+        name hairpin_queue_size type driver-specific
+          values:
+            cmode driverinit value 1024
+
+- Change the size (in packets) of the hairpin queues::
+
+    $ devlink dev param set pci/0000:06:00.0 name hairpin_queue_size value 512 cmode driverinit
+
 Health reporters
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