[PATCH] doc: announce removal of flow director

[Stephen Hemminger]

There are still leftover bits in ethdev related to flow director (fdir).
Will be removing these in 26.11 so give final notice.

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 doc/guides/rel_notes/deprecation.rst | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 17f90a6352..f9f1d97f78 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -158,3 +158,11 @@ Deprecation Notices
 * net/iavf: The dynamic mbuf field used to detect LLDP packets on the
   transmit path in the iavf PMD will be removed in a future release.
   After removal, only packet type-based detection will be supported.
+
+* ethdev: The legacy filtering data structures in ``rte_eth_ctrl.h``,
+  including the flow director (FDIR) types (``rte_eth_fdir_*``, ``rte_fdir_*``)
+  and the ntuple/ethertype/SYN/tunnel/input-set filter types, are superseded
+  by the ``rte_flow`` API and will be removed in DPDK 26.11. The associated
+  driver-facing definitions in ``ethdev_driver.h`` (``RTE_ETH_FILTER_FDIR``,
+  ``struct rte_eth_fdir_conf``, ``enum rte_eth_fdir_pballoc_type``,
+  ``enum rte_fdir_status_mode``) will be removed at the same time.
-- 
2.53.0