doc: announce behaviour change to i40e RSS

Add deprecation notice to highlight a future change in the
default configuration behavior for flexible payload for RSS.

Signed-off-by: John McNamara <john.mcnamara@intel.com>
Acked-by: Andrey Chilikin <andrey.chilikin@intel.com>

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 6d9517e..13e8543 100644 (file)
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -45,5 +45,11 @@ Deprecation Notices
   Target release for removal of the legacy API will be defined once most
   PMDs have switched to rte_flow.
 
+* i40e: The default flexible payload configuration which extracts the first 16
+  bytes of the payload for RSS will be deprecated starting from 18.02. If
+  required the previous behavior can be configured using existing flow
+  director APIs. There is no ABI/API break. This change will just remove a
+  global configuration setting and require explicit configuration.
+
 * librte_meter: The API will change to accommodate configuration profiles.
   Most of the API functions will have an additional opaque parameter.