[PATCH 3/6] crypto/dpaa2_sec: support AES-GMAC

[Gagandeep Singh <g.singh@nxp.com>]

Add AES-GMAC as a supported AEAD algorithm for IPsec protocol
offload. AES-GMAC provides NULL encryption with GMAC authentication
and maps to OP_PCL_IPSEC_AES_NULL_WITH_GMAC in the SEC protocol
control word.

When AES_GMAC is specified as an AUTH (non-AEAD) algorithm, return
-ENOTSUP with an informative message directing the user to the AEAD
path.

Add RTE_CRYPTO_AEAD_AES_GMAC to the AEAD algorithm enum and expose
the capability in dpaa2_sec_capabilities.

Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
---
 drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c | 15 +++++++++-
 drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h   | 33 ++++++++++++++++++++-
 lib/cryptodev/rte_crypto_sym.h              |  2 ++
 3 files changed, 48 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
index 15152cc5a1..0e4e67aa07 100644
--- a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
+++ b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  *
  *   Copyright (c) 2016 Freescale Semiconductor, Inc. All rights reserved.
- *   Copyright 2016-2025 NXP
+ *   Copyright 2016-2026 NXP
  *
  */
 
@@ -2975,6 +2975,13 @@ dpaa2_sec_ipsec_aead_init(struct rte_crypto_aead_xform *aead_xform,
 		aeaddata->algmode = OP_ALG_AAI_CCM;
 		session->aead_alg = RTE_CRYPTO_AEAD_AES_CCM;
 		break;
+	case RTE_CRYPTO_AEAD_AES_GMAC:
+		/**
+		 * AES-GMAC is an AEAD algo with NULL encryption and GMAC
+		 * authentication.
+		 */
+		aeaddata->algtype = OP_PCL_IPSEC_AES_NULL_WITH_GMAC;
+		break;
 	default:
 		DPAA2_SEC_ERR("Crypto: Undefined AEAD specified %u",
 			      aead_xform->algo);
@@ -3046,6 +3053,10 @@ dpaa2_sec_ipsec_proto_init(struct rte_crypto_cipher_xform *cipher_xform,
 		authdata->algtype = OP_PCL_IPSEC_HMAC_MD5_96;
 		authdata->algmode = OP_ALG_AAI_HMAC;
 		break;
+	case RTE_CRYPTO_AUTH_AES_GMAC:
+		DPAA2_SEC_ERR(
+			"AES_GMAC is supported as AEAD algo for IPSEC proto only");
+		return -ENOTSUP;
 	case RTE_CRYPTO_AUTH_SHA224_HMAC:
 		authdata->algmode = OP_ALG_AAI_HMAC;
 		if (session->digest_length == 6)
@@ -3217,6 +3228,7 @@ dpaa2_sec_set_ipsec_session(struct rte_cryptodev *dev,
 		case OP_PCL_IPSEC_AES_GCM8:
 		case OP_PCL_IPSEC_AES_GCM12:
 		case OP_PCL_IPSEC_AES_GCM16:
+		case OP_PCL_IPSEC_AES_NULL_WITH_GMAC:
 			memcpy(encap_pdb.gcm.salt,
 				(uint8_t *)&(ipsec_xform->salt), 4);
 			break;
@@ -3357,6 +3369,7 @@ dpaa2_sec_set_ipsec_session(struct rte_cryptodev *dev,
 		case OP_PCL_IPSEC_AES_GCM8:
 		case OP_PCL_IPSEC_AES_GCM12:
 		case OP_PCL_IPSEC_AES_GCM16:
+		case OP_PCL_IPSEC_AES_NULL_WITH_GMAC:
 			memcpy(decap_pdb.gcm.salt,
 				(uint8_t *)&(ipsec_xform->salt), 4);
 			break;
diff --git a/drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h b/drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h
index ff32f3d860..1824cc4a60 100644
--- a/drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h
+++ b/drivers/crypto/dpaa2_sec/dpaa2_sec_priv.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause
  *
  *   Copyright (c) 2016 Freescale Semiconductor, Inc. All rights reserved.
- *   Copyright 2016,2020-2024 NXP
+ *   Copyright 2016,2020-2026 NXP
  *
  */
 
@@ -762,6 +762,37 @@ static const struct rte_cryptodev_capabilities dpaa2_sec_capabilities[] = {
 			}, }
 		}, }
 	},
+	{	/* AES GMAC (AEAD) */
+		.op = RTE_CRYPTO_OP_TYPE_SYMMETRIC,
+		{.sym = {
+			.xform_type = RTE_CRYPTO_SYM_XFORM_AEAD,
+			{.aead = {
+				.algo = RTE_CRYPTO_AEAD_AES_GMAC,
+				.block_size = 16,
+				.key_size = {
+					.min = 16,
+					.max = 32,
+					.increment = 8
+				},
+				.digest_size = {
+					.min = 16,
+					.max = 16,
+					.increment = 0
+				},
+				.aad_size = {
+					.min = 0,
+					.max = 65535,
+					.increment = 1
+				},
+				.iv_size = {
+					.min = 12,
+					.max = 16,
+					.increment = 4
+				}
+			}, }
+		}, }
+	},
+
 	RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
 };
 
diff --git a/lib/cryptodev/rte_crypto_sym.h b/lib/cryptodev/rte_crypto_sym.h
index 630fd153bd..f65db616a0 100644
--- a/lib/cryptodev/rte_crypto_sym.h
+++ b/lib/cryptodev/rte_crypto_sym.h
@@ -508,6 +508,8 @@ enum rte_crypto_aead_algorithm {
 	/**< AES algorithm in NCA5 mode */
 	RTE_CRYPTO_AEAD_ZUC_NCA6,
 	/**< ZUC-256 algorithm in NCA6 mode */
+	RTE_CRYPTO_AEAD_AES_GMAC,
+	/**< AES algorithm in GMAC mode. */
 };
 
 /** Symmetric AEAD Operations */
-- 
2.25.1