[RFC] lib/cryptodev: update API documentation for aux_flags

[Radu Nicolau <radu.nicolau@intel.com>]

Update the API documentation description of rte_crypto_op field
aux_flags as to allow PMDs to define driver-specific flags.

Signed-off-by: Radu Nicolau <radu.nicolau@intel.com>
---
 lib/cryptodev/rte_crypto.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/lib/cryptodev/rte_crypto.h b/lib/cryptodev/rte_crypto.h
index dcf4a36fb2..38c8acbf4c 100644
--- a/lib/cryptodev/rte_crypto.h
+++ b/lib/cryptodev/rte_crypto.h
@@ -116,6 +116,10 @@ struct rte_crypto_op {
 			 * the status is RTE_CRYPTO_OP_STATUS_SUCCESS.
 			 * In case of errors, the value of this field is undefined.
 			 *
+			 * In addition to RTE_CRYPTO_OP_AUX_FLAGS_* the PMDs can define
+			 * their own optional auxiliary flags as needed, set by the
+			 * application and to be used for driver-specific purposes.
+			 *
 			 * With TLS record offload (RTE_SECURITY_PROTOCOL_TLS_RECORD),
 			 * application may provide the extra padding required for the plaintext
 			 * provided. This field can be used for passing the same in units of 8B.
-- 
2.50.1