[dpdk-dev] [PATCH v4 1/3] crypto: add sgl support in sw PMDs

[Tomasz Kulasek <tomaszx.kulasek@intel.com>]

This patch introduces RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER feature flag
informing that selected crypto device supports segmented mbufs natively
and doesn't need to be coalesced before crypto operation.

While using segmented buffers in crypto devices may have unpredictable
results, for PMDs which doesn't support it natively, additional check is
made for debug compilation.

Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
---
 drivers/crypto/aesni_gcm/aesni_gcm_pmd.c   |   14 ++++++++++++++
 drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c |   19 ++++++++++++++++---
 drivers/crypto/kasumi/rte_kasumi_pmd.c     |   13 +++++++++++++
 drivers/crypto/null/null_crypto_pmd.c      |    3 ++-
 drivers/crypto/snow3g/rte_snow3g_pmd.c     |   15 +++++++++++++++
 drivers/crypto/zuc/rte_zuc_pmd.c           |   13 +++++++++++++
 lib/librte_cryptodev/rte_cryptodev.c       |    4 ++--
 lib/librte_cryptodev/rte_cryptodev.h       |    2 ++
 8 files changed, 77 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
index dba5e15..1a6120c 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
@@ -375,6 +375,20 @@
 			break;
 		}
 
+#ifdef RTE_LIBRTE_PMD_AESNI_GCM_DEBUG
+		if (!rte_pktmbuf_is_contiguous(ops[i]->sym->m_src) ||
+				(ops[i]->sym->m_dst != NULL &&
+				!rte_pktmbuf_is_contiguous(
+						ops[i]->sym->m_dst))) {
+			ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			GCM_LOG_ERR("PMD supports only contiguous mbufs, "
+				"op (%p) provides noncontiguous mbuf as "
+				"source/destination buffer.\n", ops[i]);
+			qp->qp_stats.enqueue_err_count++;
+			break;
+		}
+#endif
+
 		retval = process_gcm_crypto_op(qp, ops[i]->sym, sess);
 		if (retval < 0) {
 			ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
diff --git a/drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c b/drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c
index 6d27d75..25f681b 100644
--- a/drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c
+++ b/drivers/crypto/aesni_mb/rte_aesni_mb_pmd.c
@@ -571,15 +571,28 @@
 	int i, processed_jobs = 0;
 
 	for (i = 0; i < nb_ops; i++) {
-#ifdef RTE_LIBRTE_AESNI_MB_DEBUG
-		if (unlikely(op->type != RTE_CRYPTO_OP_TYPE_SYMMETRIC)) {
+#ifdef RTE_LIBRTE_PMD_AESNI_MB_DEBUG
+		if (unlikely(ops[i]->type != RTE_CRYPTO_OP_TYPE_SYMMETRIC)) {
 			MB_LOG_ERR("PMD only supports symmetric crypto "
 				"operation requests, op (%p) is not a "
-				"symmetric operation.", op);
+				"symmetric operation.", ops[i]);
+			qp->stats.enqueue_err_count++;
+			goto flush_jobs;
+		}
+
+		if (!rte_pktmbuf_is_contiguous(ops[i]->sym->m_src) ||
+				(ops[i]->sym->m_dst != NULL &&
+				!rte_pktmbuf_is_contiguous(
+						ops[i]->sym->m_dst))) {
+			MB_LOG_ERR("PMD supports only contiguous mbufs, "
+				"op (%p) provides noncontiguous mbuf as "
+				"source/destination buffer.\n", ops[i]);
+			ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
 			qp->stats.enqueue_err_count++;
 			goto flush_jobs;
 		}
 #endif
+
 		sess = get_session(qp, ops[i]);
 		if (unlikely(sess == NULL)) {
 			qp->stats.enqueue_err_count++;
diff --git a/drivers/crypto/kasumi/rte_kasumi_pmd.c b/drivers/crypto/kasumi/rte_kasumi_pmd.c
index b119da2..4bdd7bb 100644
--- a/drivers/crypto/kasumi/rte_kasumi_pmd.c
+++ b/drivers/crypto/kasumi/rte_kasumi_pmd.c
@@ -455,6 +455,19 @@
 	for (i = 0; i < nb_ops; i++) {
 		curr_c_op = ops[i];
 
+#ifdef RTE_LIBRTE_PMD_KASUMI_DEBUG
+		if (!rte_pktmbuf_is_contiguous(curr_c_op->sym->m_src) ||
+				(curr_c_op->sym->m_dst != NULL &&
+				!rte_pktmbuf_is_contiguous(
+						curr_c_op->sym->m_dst))) {
+			KASUMI_LOG_ERR("PMD supports only contiguous mbufs, "
+				"op (%p) provides noncontiguous mbuf as "
+				"source/destination buffer.\n", curr_c_op);
+			curr_c_op->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			break;
+		}
+#endif
+
 		/* Set status as enqueued (not processed yet) by default. */
 		curr_c_op->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
 
diff --git a/drivers/crypto/null/null_crypto_pmd.c b/drivers/crypto/null/null_crypto_pmd.c
index c69606b..c37d3d6 100644
--- a/drivers/crypto/null/null_crypto_pmd.c
+++ b/drivers/crypto/null/null_crypto_pmd.c
@@ -216,7 +216,8 @@
 	dev->enqueue_burst = null_crypto_pmd_enqueue_burst;
 
 	dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
-			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING;
+			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
+			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
 
 	internals = dev->data->dev_private;
 
diff --git a/drivers/crypto/snow3g/rte_snow3g_pmd.c b/drivers/crypto/snow3g/rte_snow3g_pmd.c
index 3b4292a..9a6f16d 100644
--- a/drivers/crypto/snow3g/rte_snow3g_pmd.c
+++ b/drivers/crypto/snow3g/rte_snow3g_pmd.c
@@ -330,6 +330,21 @@
 	unsigned i;
 	unsigned enqueued_ops, processed_ops;
 
+#ifdef RTE_LIBRTE_PMD_SNOW3G_DEBUG
+	for (i = 0; i < num_ops; i++) {
+		if (!rte_pktmbuf_is_contiguous(ops[i]->sym->m_src) ||
+				(ops[i]->sym->m_dst != NULL &&
+				!rte_pktmbuf_is_contiguous(
+						ops[i]->sym->m_dst))) {
+			SNOW3G_LOG_ERR("PMD supports only contiguous mbufs, "
+				"op (%p) provides noncontiguous mbuf as "
+				"source/destination buffer.\n", ops[i]);
+			ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			return 0;
+		}
+	}
+#endif
+
 	switch (session->op) {
 	case SNOW3G_OP_ONLY_CIPHER:
 		processed_ops = process_snow3g_cipher_op(ops,
diff --git a/drivers/crypto/zuc/rte_zuc_pmd.c b/drivers/crypto/zuc/rte_zuc_pmd.c
index 3849119..bf53f76 100644
--- a/drivers/crypto/zuc/rte_zuc_pmd.c
+++ b/drivers/crypto/zuc/rte_zuc_pmd.c
@@ -211,6 +211,19 @@
 			break;
 		}
 
+#ifdef RTE_LIBRTE_PMD_ZUC_DEBUG
+		if (!rte_pktmbuf_is_contiguous(ops[i]->sym->m_src) ||
+				(ops[i]->sym->m_dst != NULL &&
+				!rte_pktmbuf_is_contiguous(
+						ops[i]->sym->m_dst))) {
+			ZUC_LOG_ERR("PMD supports only contiguous mbufs, "
+				"op (%p) provides noncontiguous mbuf as "
+				"source/destination buffer.\n", ops[i]);
+			ops[i]->status = RTE_CRYPTO_OP_STATUS_INVALID_ARGS;
+			break;
+		}
+#endif
+
 		src[i] = rte_pktmbuf_mtod(ops[i]->sym->m_src, uint8_t *) +
 				(ops[i]->sym->cipher.data.offset >> 3);
 		dst[i] = ops[i]->sym->m_dst ?
diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c
index 54e95d5..bbab4b3 100644
--- a/lib/librte_cryptodev/rte_cryptodev.c
+++ b/lib/librte_cryptodev/rte_cryptodev.c
@@ -211,13 +211,13 @@ struct rte_cryptodev_callback {
 		return "CPU_AESNI";
 	case RTE_CRYPTODEV_FF_HW_ACCELERATED:
 		return "HW_ACCELERATED";
-
+	case RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER:
+		return "MBUF_SCATTER_GATHER";
 	default:
 		return NULL;
 	}
 }
 
-
 int
 rte_cryptodev_create_vdev(const char *name, const char *args)
 {
diff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h
index 29d8eec..fa311a9 100644
--- a/lib/librte_cryptodev/rte_cryptodev.h
+++ b/lib/librte_cryptodev/rte_cryptodev.h
@@ -227,6 +227,8 @@ struct rte_cryptodev_capabilities {
 /**< Operations are off-loaded to an external hardware accelerator */
 #define	RTE_CRYPTODEV_FF_CPU_AVX512		(1ULL << 8)
 /**< Utilises CPU SIMD AVX512 instructions */
+#define	RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER	(1ULL << 9)
+/**< Scatter-gather mbufs are supported */
 
 
 /**
-- 
1.7.9.5