[PATCH v2 4/8] crypto/cnxk: add new API to get EC grp tbl address

[Tejasree Kondoj <ktejasree@marvell.com>]

From: Sucharitha Sarananaga <ssarananaga@marvell.com>

This patch introduces a new API to get AE EC group table
address and added static_assert checks to ensure that each
enum value in roc_ae_ec_id matches its expected constant.
This helps catch accidental changes or reordering of enum
values at compile time.

Signed-off-by: Sucharitha Sarananaga <ssarananaga@marvell.com>
---
 drivers/crypto/cnxk/cnxk_cryptodev_ops.c  | 47 ++++++++++++++
 drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h | 78 +++++++++++++++++++++++
 2 files changed, 125 insertions(+)

diff --git a/drivers/crypto/cnxk/cnxk_cryptodev_ops.c b/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
index 97c12c6087..8bc7b2c345 100644
--- a/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
+++ b/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
@@ -43,6 +43,29 @@
 #define CNXK_CPT_MAX_ASYM_OP_MOD_LEN	 1024
 #define CNXK_CPT_META_BUF_MAX_CACHE_SIZE 128
 
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P192 == (uint16_t)ROC_AE_EC_ID_P192,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P224 == (uint16_t)ROC_AE_EC_ID_P224,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P256 == (uint16_t)ROC_AE_EC_ID_P256,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P384 == (uint16_t)ROC_AE_EC_ID_P384,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P521 == (uint16_t)ROC_AE_EC_ID_P521,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P160 == (uint16_t)ROC_AE_EC_ID_P160,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P320 == (uint16_t)ROC_AE_EC_ID_P320,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_P512 == (uint16_t)ROC_AE_EC_ID_P512,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_SM2 == (uint16_t)ROC_AE_EC_ID_SM2,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_ED25519 == (uint16_t)ROC_AE_EC_ID_ED25519,
+	      "Enum value mismatch");
+static_assert((uint16_t)RTE_PMD_CNXK_AE_EC_ID_ED448 == (uint16_t)ROC_AE_EC_ID_ED448,
+	      "Enum value mismatch");
+
 static int
 cnxk_cpt_get_mlen(void)
 {
@@ -1018,6 +1041,30 @@ rte_pmd_cnxk_ae_fpm_table_get(uint8_t dev_id)
 	return vf->cnxk_fpm_iova;
 }
 
+RTE_EXPORT_EXPERIMENTAL_SYMBOL(rte_pmd_cnxk_ae_ec_grp_table_get, 25.07)
+const struct rte_pmd_cnxk_crypto_ae_ec_group_params **
+rte_pmd_cnxk_ae_ec_grp_table_get(uint8_t dev_id, uint16_t *nb_max_entries)
+{
+	struct rte_cryptodev *dev;
+	struct cnxk_cpt_vf *vf;
+
+	dev = rte_cryptodev_pmd_get_dev(dev_id);
+	if (dev == NULL) {
+		plt_err("Invalid dev_id %u", dev_id);
+		return NULL;
+	}
+
+	vf = dev->data->dev_private;
+	if (vf == NULL) {
+		plt_err("VF is not initialized");
+		return NULL;
+	}
+
+	*nb_max_entries = ROC_AE_EC_ID_PMAX;
+
+	return (const struct rte_pmd_cnxk_crypto_ae_ec_group_params **)(void *)vf->ec_grp;
+}
+
 static inline void
 cnxk_crypto_cn10k_submit(struct rte_pmd_cnxk_crypto_qptr *qptr, void *inst, uint16_t nb_inst)
 {
diff --git a/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h b/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
index cd3ddc9dd1..3d43c77b8c 100644
--- a/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
+++ b/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
@@ -16,6 +16,26 @@
 #include <rte_crypto.h>
 #include <rte_security.h>
 
+#define AE_EC_DATA_MAX 66
+
+/**
+ * Enumerates supported elliptic curves
+ */
+typedef enum {
+	RTE_PMD_CNXK_AE_EC_ID_P192 = 0,
+	RTE_PMD_CNXK_AE_EC_ID_P224 = 1,
+	RTE_PMD_CNXK_AE_EC_ID_P256 = 2,
+	RTE_PMD_CNXK_AE_EC_ID_P384 = 3,
+	RTE_PMD_CNXK_AE_EC_ID_P521 = 4,
+	RTE_PMD_CNXK_AE_EC_ID_P160 = 5,
+	RTE_PMD_CNXK_AE_EC_ID_P320 = 6,
+	RTE_PMD_CNXK_AE_EC_ID_P512 = 7,
+	RTE_PMD_CNXK_AE_EC_ID_SM2 = 8,
+	RTE_PMD_CNXK_AE_EC_ID_ED25519 = 9,
+	RTE_PMD_CNXK_AE_EC_ID_ED448 = 10,
+	RTE_PMD_CNXK_AE_EC_ID_PMAX
+} rte_pmd_cnxk_ae_ec_id;
+
 /* Forward declarations */
 
 /**
@@ -72,6 +92,41 @@ struct rte_pmd_cnxk_crypto_sess {
 	};
 };
 
+/**
+ * @brief AE EC (Elliptic Curve) group parameters structure.
+ *
+ * This structure holds the parameters for an elliptic curve group used in
+ * AE (Asymmetric Encryption) operations. It contains the prime, order,
+ * and curve constants (consta and constb), each represented as a byte array
+ * with an associated length. The maximum length is set to accommodate the
+ * largest supported curve (e.g., P521).
+ */
+struct rte_pmd_cnxk_crypto_ae_ec_group_params {
+	struct {
+		/* P521 maximum length */
+		uint8_t data[AE_EC_DATA_MAX];
+		unsigned int length;
+	} prime;
+
+	struct {
+		/* P521 maximum length */
+		uint8_t data[AE_EC_DATA_MAX];
+		unsigned int length;
+	} order;
+
+	struct {
+		/* P521 maximum length */
+		uint8_t data[AE_EC_DATA_MAX];
+		unsigned int length;
+	} consta;
+
+	struct {
+		/* P521 maximum length */
+		uint8_t data[AE_EC_DATA_MAX];
+		unsigned int length;
+	} constb;
+};
+
 /**
  * Get queue pointer of a specific queue in a cryptodev.
  *
@@ -231,4 +286,27 @@ int rte_pmd_cnxk_crypto_qp_stats_get(struct rte_pmd_cnxk_crypto_qptr *qptr,
 __rte_experimental 
 const uint64_t *rte_pmd_cnxk_ae_fpm_table_get(uint8_t dev_id);
 
+/**
+ * Retrieves the addresses of the AE EC group table.
+ *
+ * This API should be called only after the cryptodev device has been
+ * successfully configured. The returned pointer reference memory that is
+ * valid as long as the device remains configured and is not destroyed or
+ * reconfigured. If the device is reconfigured or destroyed, the memory
+ * referenced by the returned pointer becomes invalid and must not be used.
+ *
+ * @param dev_id
+ *   Device identifier of cryptodev device.
+ * @param nb_max_entries
+ *   Pointer to store the maximum number of entries in the EC group table.
+ *   This value is set by the function to indicate how many entries can be
+ *   retrieved from the table.
+ * @return
+ *   - On success, pointer to the AE EC group table structure address.
+ *   - NULL on error.
+ */
+__rte_experimental
+const struct rte_pmd_cnxk_crypto_ae_ec_group_params **
+rte_pmd_cnxk_ae_ec_grp_table_get(uint8_t dev_id, uint16_t *nb_max_entries);
+
 #endif /* _PMD_CNXK_CRYPTO_H_ */
-- 
2.25.1