doc: add mlx5 Direct Verbs flow engine limitation

Would be good to add also a code which disable the dv_flow_en
the user requested. However such support will need to use new netlink
command to query the switchdev mode from the underlying kernel.

Considering the current 18.11 release is close to RC3, only a
documentation is added.

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>

diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index 7af5ead..6ab7d8e 100644 (file)
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -434,6 +434,7 @@ Run-time configuration
 
   A nonzero value enables the DV flow steering assuming it is supported
   by the driver.
+  The DV flow steering is not supported on switchdev mode.
 
   Disabled by default.