doc: announce crypto API change for GCM IV

This patch adds deprecation notice of changing iv behaviour
when using Galois Counter Mode of operation.
With this change, IV of all supported sizes can be used.

Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Akhil Goyal <akhil.goyal@nxp.com>
Acked-by: Anoob Joseph <anoobj@marvell.com>

diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index fc830dc..f2279eb 100644 (file)
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -93,5 +93,11 @@ Deprecation Notices
   structure (``rte_crypto_cipher_xform``, ``rte_crypto_auth_xform``, and
   ``rte_crypto_aead_xform``) will be changed to ``const uint8_t *data``.
 
+* cryptodev: support for using IV with all sizes is added, J0 still can
+  be used but only when IV length in following structs ``rte_crypto_auth_xform``,
+  ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal
+  to one it means it represents IV, when is set to zero it means J0 is used
+  directly, in this case 16 bytes of J0 need to be passed.
+
 * metrics: The function ``rte_metrics_init`` will have a non-void return
   in order to notify errors instead of calling ``rte_exit``.