[dpdk-dev] [PATCH 2/2] crypto/qat: handle mixed hash-cipher crypto on GEN2 QAT

[Adam Dybkowski <adamx.dybkowski@intel.com>]

This patch adds handling of mixed hash-cipher algorithms
available on GEN2 QAT in particular firmware versions.
Also the documentation is updated to show the mixed crypto
algorithms are supported on QAT GEN2.

Signed-off-by: Adam Dybkowski <adamx.dybkowski@intel.com>
---
 doc/guides/cryptodevs/qat.rst          |  9 ++++-----
 doc/guides/rel_notes/release_20_05.rst |  7 +++++++
 drivers/crypto/qat/qat_sym_pmd.c       | 23 +++++++++++++++++++++++
 drivers/crypto/qat/qat_sym_pmd.h       |  5 +++++
 drivers/crypto/qat/qat_sym_session.c   | 17 +++++++++++------
 5 files changed, 50 insertions(+), 11 deletions(-)

diff --git a/doc/guides/cryptodevs/qat.rst b/doc/guides/cryptodevs/qat.rst
index 06985e319..2e0dc1b00 100644
--- a/doc/guides/cryptodevs/qat.rst
+++ b/doc/guides/cryptodevs/qat.rst
@@ -82,18 +82,17 @@ All the usual chains are supported and also some mixed chains:
    +------------------+-----------+-------------+----------+----------+
    | Cipher algorithm | NULL AUTH | SNOW3G UIA2 | ZUC EIA3 | AES CMAC |
    +==================+===========+=============+==========+==========+
-   | NULL CIPHER      | Y         | 3           | 3        | Y        |
+   | NULL CIPHER      | Y         | 2&3         | 2&3      | Y        |
    +------------------+-----------+-------------+----------+----------+
-   | SNOW3G UEA2      | 3         | Y           | 3        | 3        |
+   | SNOW3G UEA2      | 2&3       | Y           | 2&3      | 2&3      |
    +------------------+-----------+-------------+----------+----------+
-   | ZUC EEA3         | 3         | 3           | 2&3      | 3        |
+   | ZUC EEA3         | 2&3       | 2&3         | 2&3      | 2&3      |
    +------------------+-----------+-------------+----------+----------+
-   | AES CTR          | Y         | 3           | 3        | Y        |
+   | AES CTR          | Y         | 2&3         | 2&3      | Y        |
    +------------------+-----------+-------------+----------+----------+
 
 * The combinations marked as "Y" are supported on all QAT hardware versions.
 * The combinations marked as "2&3" are supported on GEN2/GEN3 QAT hardware only.
-* The combinations marked as "3" are supported on GEN3 QAT hardware only.
 
 
 Limitations
diff --git a/doc/guides/rel_notes/release_20_05.rst b/doc/guides/rel_notes/release_20_05.rst
index 2190eaf85..bdfa64973 100644
--- a/doc/guides/rel_notes/release_20_05.rst
+++ b/doc/guides/rel_notes/release_20_05.rst
@@ -56,6 +56,13 @@ New Features
      Also, make sure to start the actual text at the margin.
      =========================================================
 
+* **Added handling of mixed crypto algorithms in QAT PMD for GEN2.**
+
+  Enabled handling of mixed algorithms in encrypted digest hash-cipher
+  (generation) and cipher-hash (verification) requests in QAT PMD
+  when running on GEN2 QAT hardware with particular firmware versions
+  (GEN3 support was added in DPDK 20.02).
+
 
 Removed Items
 -------------
diff --git a/drivers/crypto/qat/qat_sym_pmd.c b/drivers/crypto/qat/qat_sym_pmd.c
index 666ede726..69b11ec78 100644
--- a/drivers/crypto/qat/qat_sym_pmd.c
+++ b/drivers/crypto/qat/qat_sym_pmd.c
@@ -14,6 +14,8 @@
 #include "qat_sym_session.h"
 #include "qat_sym_pmd.h"
 
+#define MIXED_CRYPTO_MIN_FW_VER 0x04090000
+
 uint8_t cryptodev_qat_driver_id;
 
 static const struct rte_cryptodev_capabilities qat_gen1_sym_capabilities[] = {
@@ -187,6 +189,27 @@ static int qat_sym_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
 				qat_sgl_dst);
 	}
 
+	/* Get fw version from QAT (GEN2), skip if we've got it already */
+	if (qp->qat_dev_gen == QAT_GEN2 && !(qat_private->internal_capabilities
+			& QAT_SYM_CAP_VALID)) {
+		ret = qat_cq_get_fw_version(qp);
+
+		if (ret < 0)
+			return ret;
+
+		if (ret != 0)
+			QAT_LOG(DEBUG, "QAT firmware version: %d.%d.%d",
+					(ret >> 24) & 0xff,
+					(ret >> 16) & 0xff,
+					(ret >> 8) & 0xff);
+
+		/* set capabilities based on the fw version */
+		qat_private->internal_capabilities = QAT_SYM_CAP_VALID |
+				((ret >= MIXED_CRYPTO_MIN_FW_VER) ?
+						QAT_SYM_CAP_MIXED_CRYPTO : 0);
+		ret = 0;
+	}
+
 	return ret;
 }
 
diff --git a/drivers/crypto/qat/qat_sym_pmd.h b/drivers/crypto/qat/qat_sym_pmd.h
index a32c25abc..a5a31e512 100644
--- a/drivers/crypto/qat/qat_sym_pmd.h
+++ b/drivers/crypto/qat/qat_sym_pmd.h
@@ -15,6 +15,10 @@
 /** Intel(R) QAT Symmetric Crypto PMD driver name */
 #define CRYPTODEV_NAME_QAT_SYM_PMD	crypto_qat
 
+/* Internal capabilities */
+#define QAT_SYM_CAP_MIXED_CRYPTO	(1 << 0)
+#define QAT_SYM_CAP_VALID		(1 << 31)
+
 extern uint8_t cryptodev_qat_driver_id;
 
 /** private data structure for a QAT device.
@@ -29,6 +33,7 @@ struct qat_sym_dev_private {
 	const struct rte_cryptodev_capabilities *qat_dev_capabilities;
 	/* QAT device symmetric crypto capabilities */
 	uint16_t min_enq_burst_threshold;
+	uint32_t internal_capabilities; /* see flags QAT_SYM_CAP_xxx */
 };
 
 int
diff --git a/drivers/crypto/qat/qat_sym_session.c b/drivers/crypto/qat/qat_sym_session.c
index 4359f2f0b..bf6af60aa 100644
--- a/drivers/crypto/qat/qat_sym_session.c
+++ b/drivers/crypto/qat/qat_sym_session.c
@@ -459,18 +459,23 @@ qat_sym_session_set_ext_hash_flags(struct qat_sym_session *session,
 }
 
 static void
-qat_sym_session_handle_mixed(struct qat_sym_session *session)
+qat_sym_session_handle_mixed(const struct rte_cryptodev *dev,
+		struct qat_sym_session *session)
 {
+	const struct qat_sym_dev_private *qat_private = dev->data->dev_private;
+	enum qat_device_gen min_dev_gen = (qat_private->internal_capabilities &
+			QAT_SYM_CAP_MIXED_CRYPTO) ? QAT_GEN2 : QAT_GEN3;
+
 	if (session->qat_hash_alg == ICP_QAT_HW_AUTH_ALGO_ZUC_3G_128_EIA3 &&
 			session->qat_cipher_alg !=
 			ICP_QAT_HW_CIPHER_ALGO_ZUC_3G_128_EEA3) {
-		session->min_qat_dev_gen = QAT_GEN3;
+		session->min_qat_dev_gen = min_dev_gen;
 		qat_sym_session_set_ext_hash_flags(session,
 			1 << ICP_QAT_FW_AUTH_HDR_FLAG_ZUC_EIA3_BITPOS);
 	} else if (session->qat_hash_alg == ICP_QAT_HW_AUTH_ALGO_SNOW_3G_UIA2 &&
 			session->qat_cipher_alg !=
 			ICP_QAT_HW_CIPHER_ALGO_SNOW_3G_UEA2) {
-		session->min_qat_dev_gen = QAT_GEN3;
+		session->min_qat_dev_gen = min_dev_gen;
 		qat_sym_session_set_ext_hash_flags(session,
 			1 << ICP_QAT_FW_AUTH_HDR_FLAG_SNOW3G_UIA2_BITPOS);
 	} else if ((session->aes_cmac ||
@@ -479,7 +484,7 @@ qat_sym_session_handle_mixed(struct qat_sym_session *session)
 			ICP_QAT_HW_CIPHER_ALGO_SNOW_3G_UEA2 ||
 			session->qat_cipher_alg ==
 			ICP_QAT_HW_CIPHER_ALGO_ZUC_3G_128_EEA3)) {
-		session->min_qat_dev_gen = QAT_GEN3;
+		session->min_qat_dev_gen = min_dev_gen;
 		qat_sym_session_set_ext_hash_flags(session, 0);
 	}
 }
@@ -532,7 +537,7 @@ qat_sym_session_set_parameters(struct rte_cryptodev *dev,
 			if (ret < 0)
 				return ret;
 			/* Special handling of mixed hash+cipher algorithms */
-			qat_sym_session_handle_mixed(session);
+			qat_sym_session_handle_mixed(dev, session);
 		}
 		break;
 	case ICP_QAT_FW_LA_CMD_HASH_CIPHER:
@@ -551,7 +556,7 @@ qat_sym_session_set_parameters(struct rte_cryptodev *dev,
 			if (ret < 0)
 				return ret;
 			/* Special handling of mixed hash+cipher algorithms */
-			qat_sym_session_handle_mixed(session);
+			qat_sym_session_handle_mixed(dev, session);
 		}
 		break;
 	case ICP_QAT_FW_LA_CMD_TRNG_GET_RANDOM:
-- 
2.17.1