doc: announce extension of crypto data-unit length

The struct member dataunit_len is introduced in DPDK 21.05.
It is limited to 16 bits to fit a padding hole in 32-bit build.
This means the maximum data-unit length is 64 KB.
Some use cases may benefit of a bigger size as the proposed 32 bits.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Akhil Goyal <gakhil@marvell.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Acked-by: Matan Azrad <matan@nvidia.com>

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index d9c0e65..b660562 100644 (file)
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -139,6 +139,10 @@ Deprecation Notices
   can still be used if users specify the devarg "driver=i40evf". I40evf will
   be deleted in DPDK 21.11.
 
+* cryptodev: The field ``dataunit_len`` of the ``struct rte_crypto_cipher_xform``
+  has a limited size ``uint16_t``.
+  It will be moved and extended as ``uint32_t`` in DPDK 21.11.
+
 * eventdev: The structure ``rte_event_eth_rx_adapter_queue_conf`` will be
   extended to include ``rte_event_eth_rx_adapter_event_vector_config`` elements
   and the function ``rte_event_eth_rx_adapter_queue_event_vector_config`` will