[dpdk-dev] [PATCH 4/8] common/cpt: add helper functions for asymmetric crypto

[Anoob Joseph <anoobj@marvell.com>]

From: Kanaka Durga Kotamarthy <kkotamarthy@marvell.com>

Add helper functions to get meta len for asymmetric operations

Signed-off-by: Anoob Joseph <anoobj@marvell.com>
Signed-off-by: Kanaka Durga Kotamarthy <kkotamarthy@marvell.com>
Signed-off-by: Sunila Sahu <ssahu@marvell.com>
---
 drivers/common/cpt/cpt_pmd_ops_helper.c           | 15 +++++++++++
 drivers/common/cpt/cpt_pmd_ops_helper.h           |  9 +++++++
 drivers/common/cpt/rte_common_cpt_version.map     |  8 ++++++
 drivers/crypto/octeontx/otx_cryptodev_hw_access.c | 32 +++++++++++++++--------
 4 files changed, 53 insertions(+), 11 deletions(-)

diff --git a/drivers/common/cpt/cpt_pmd_ops_helper.c b/drivers/common/cpt/cpt_pmd_ops_helper.c
index 1c18180..09b762f 100644
--- a/drivers/common/cpt/cpt_pmd_ops_helper.c
+++ b/drivers/common/cpt/cpt_pmd_ops_helper.c
@@ -11,6 +11,8 @@
 
 #define CPT_MAX_IV_LEN 16
 #define CPT_OFFSET_CONTROL_BYTES 8
+#define CPT_MAX_ASYM_OP_NUM_PARAMS 5
+#define CPT_MAX_ASYM_OP_MOD_LEN 1024
 
 int32_t
 cpt_pmd_ops_helper_get_mlen_direct_mode(void)
@@ -39,3 +41,16 @@ cpt_pmd_ops_helper_get_mlen_sg_mode(void)
 	len += 2 * sizeof(cpt_res_s_t);
 	return len;
 }
+
+int
+cpt_pmd_ops_helper_asym_get_mlen(void)
+{
+	uint32_t len;
+
+	/* Get meta len for linear buffer (direct) mode */
+	len = cpt_pmd_ops_helper_get_mlen_direct_mode();
+
+	/* Get meta len for asymmetric operations */
+	len += CPT_MAX_ASYM_OP_NUM_PARAMS * CPT_MAX_ASYM_OP_MOD_LEN;
+	return len;
+}
diff --git a/drivers/common/cpt/cpt_pmd_ops_helper.h b/drivers/common/cpt/cpt_pmd_ops_helper.h
index dd32f9a..24c3559 100644
--- a/drivers/common/cpt/cpt_pmd_ops_helper.h
+++ b/drivers/common/cpt/cpt_pmd_ops_helper.h
@@ -31,4 +31,13 @@ cpt_pmd_ops_helper_get_mlen_direct_mode(void);
  */
 int
 cpt_pmd_ops_helper_get_mlen_sg_mode(void);
+
+/*
+ * Get size of meta buffer to be allocated for asymmetric crypto operations
+ *
+ * @return
+ *  - length
+ */
+int
+cpt_pmd_ops_helper_asym_get_mlen(void);
 #endif /* _CPT_PMD_OPS_HELPER_H_ */
diff --git a/drivers/common/cpt/rte_common_cpt_version.map b/drivers/common/cpt/rte_common_cpt_version.map
index dec614f..382ec4b 100644
--- a/drivers/common/cpt/rte_common_cpt_version.map
+++ b/drivers/common/cpt/rte_common_cpt_version.map
@@ -4,3 +4,11 @@ DPDK_18.11 {
 	cpt_pmd_ops_helper_get_mlen_direct_mode;
 	cpt_pmd_ops_helper_get_mlen_sg_mode;
 };
+
+DPDK_19.11 {
+	global:
+
+	cpt_pmd_ops_helper_asym_get_mlen;
+
+	local: *;
+};
diff --git a/drivers/crypto/octeontx/otx_cryptodev_hw_access.c b/drivers/crypto/octeontx/otx_cryptodev_hw_access.c
index ad64bf4..0543494 100644
--- a/drivers/crypto/octeontx/otx_cryptodev_hw_access.c
+++ b/drivers/crypto/octeontx/otx_cryptodev_hw_access.c
@@ -412,24 +412,34 @@ otx_cpt_metabuf_mempool_create(const struct rte_cryptodev *dev,
 			       int nb_elements)
 {
 	char mempool_name[RTE_MEMPOOL_NAMESIZE];
-	int sg_mlen, lb_mlen, max_mlen, ret;
 	struct cpt_qp_meta_info *meta_info;
 	struct rte_mempool *pool;
+	int max_mlen = 0;
+	int sg_mlen = 0;
+	int lb_mlen = 0;
+	int ret;
 
-	/* Get meta len for scatter gather mode */
-	sg_mlen = cpt_pmd_ops_helper_get_mlen_sg_mode();
+	if (dev->feature_flags & RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO) {
 
-	/* Extra 32B saved for future considerations */
-	sg_mlen += 4 * sizeof(uint64_t);
+		/* Get meta len for scatter gather mode */
+		sg_mlen = cpt_pmd_ops_helper_get_mlen_sg_mode();
 
-	/* Get meta len for linear buffer (direct) mode */
-	lb_mlen = cpt_pmd_ops_helper_get_mlen_direct_mode();
+		/* Extra 32B saved for future considerations */
+		sg_mlen += 4 * sizeof(uint64_t);
 
-	/* Extra 32B saved for future considerations */
-	lb_mlen += 4 * sizeof(uint64_t);
+		/* Get meta len for linear buffer (direct) mode */
+		lb_mlen = cpt_pmd_ops_helper_get_mlen_direct_mode();
 
-	/* Check max requirement for meta buffer */
-	max_mlen = RTE_MAX(lb_mlen, sg_mlen);
+		/* Extra 32B saved for future considerations */
+		lb_mlen += 4 * sizeof(uint64_t);
+
+		/* Check max requirement for meta buffer */
+		max_mlen = RTE_MAX(lb_mlen, sg_mlen);
+	} else if (dev->feature_flags & RTE_CRYPTODEV_FF_ASYMMETRIC_CRYPTO) {
+
+		/* Get meta len for asymmetric operations */
+		max_mlen = cpt_pmd_ops_helper_asym_get_mlen();
+	}
 
 	/* Allocate mempool */
 
-- 
2.7.4