[PATCH 07/11] crypto/cnxk: use opaque pointer for PMD APIs

[Tejasree Kondoj <ktejasree@marvell.com>]

From: Anoob Joseph <anoobj@marvell.com>

Use opaque pointer instead of void * for PMD APIs. Usage of forward
declaration and opaque pointer would allow compiler to prevent
unintended usage which cannot be prevented with void *.

Signed-off-by: Anoob Joseph <anoobj@marvell.com>
---
 drivers/crypto/cnxk/cnxk_cryptodev_ops.c  | 12 ++++++------
 drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h | 18 +++++++++++++++---
 2 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/crypto/cnxk/cnxk_cryptodev_ops.c b/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
index cfcfa79fdf..d0ad2d9a4b 100644
--- a/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
+++ b/drivers/crypto/cnxk/cnxk_cryptodev_ops.c
@@ -945,7 +945,7 @@ cnxk_cpt_queue_pair_event_error_query(struct rte_cryptodev *dev, uint16_t qp_id)
 	return 0;
 }
 
-void *
+struct rte_pmd_cnxk_crypto_qptr *
 rte_pmd_cnxk_crypto_qptr_get(uint8_t dev_id, uint16_t qp_id)
 {
 	const struct rte_crypto_fp_ops *fp_ops;
@@ -958,9 +958,9 @@ rte_pmd_cnxk_crypto_qptr_get(uint8_t dev_id, uint16_t qp_id)
 }
 
 static inline void
-cnxk_crypto_cn10k_submit(void *qptr, void *inst, uint16_t nb_inst)
+cnxk_crypto_cn10k_submit(struct rte_pmd_cnxk_crypto_qptr *qptr, void *inst, uint16_t nb_inst)
 {
-	struct cnxk_cpt_qp *qp = qptr;
+	struct cnxk_cpt_qp *qp = PLT_PTR_CAST(qptr);
 	uint64_t lmt_base, io_addr;
 	uint16_t lmt_id;
 	void *lmt_dst;
@@ -987,9 +987,9 @@ cnxk_crypto_cn10k_submit(void *qptr, void *inst, uint16_t nb_inst)
 }
 
 static inline void
-cnxk_crypto_cn9k_submit(void *qptr, void *inst, uint16_t nb_inst)
+cnxk_crypto_cn9k_submit(struct rte_pmd_cnxk_crypto_qptr *qptr, void *inst, uint16_t nb_inst)
 {
-	struct cnxk_cpt_qp *qp = qptr;
+	struct cnxk_cpt_qp *qp = PLT_PTR_CAST(qptr);
 
 	const uint64_t lmt_base = qp->lf.lmt_base;
 	const uint64_t io_addr = qp->lf.io_addr;
@@ -1008,7 +1008,7 @@ cnxk_crypto_cn9k_submit(void *qptr, void *inst, uint16_t nb_inst)
 }
 
 void
-rte_pmd_cnxk_crypto_submit(void *qptr, void *inst, uint16_t nb_inst)
+rte_pmd_cnxk_crypto_submit(struct rte_pmd_cnxk_crypto_qptr *qptr, void *inst, uint16_t nb_inst)
 {
 	if (roc_model_is_cn10k())
 		return cnxk_crypto_cn10k_submit(qptr, inst, nb_inst);
diff --git a/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h b/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
index eab1243065..28d86b5a18 100644
--- a/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
+++ b/drivers/crypto/cnxk/rte_pmd_cnxk_crypto.h
@@ -13,6 +13,16 @@
 
 #include <stdint.h>
 
+/* Forward declarations */
+
+/**
+ * @brief Crypto CNXK PMD QPTR opaque pointer.
+ *
+ * This structure represents the queue pair structure that would be the input to APIs that use
+ * hardware queues.
+ */
+struct rte_pmd_cnxk_crypto_qptr;
+
 /**
  * Get queue pointer of a specific queue in a cryptodev.
  *
@@ -21,10 +31,11 @@
  * @param qp_id
  *   Index of the queue pair.
  * @return
- *   Pointer to queue pair structure that would be the input to submit APIs.
+ *   - On success, pointer to queue pair structure that would be the input to submit APIs.
+ *   - NULL on error.
  */
 __rte_experimental
-void *rte_pmd_cnxk_crypto_qptr_get(uint8_t dev_id, uint16_t qp_id);
+struct rte_pmd_cnxk_crypto_qptr *rte_pmd_cnxk_crypto_qptr_get(uint8_t dev_id, uint16_t qp_id);
 
 /**
  * Submit CPT instruction (cpt_inst_s) to hardware (CPT).
@@ -43,6 +54,7 @@ void *rte_pmd_cnxk_crypto_qptr_get(uint8_t dev_id, uint16_t qp_id);
  *   Number of instructions.
  */
 __rte_experimental
-void rte_pmd_cnxk_crypto_submit(void *qptr, void *inst, uint16_t nb_inst);
+void rte_pmd_cnxk_crypto_submit(struct rte_pmd_cnxk_crypto_qptr *qptr, void *inst,
+				uint16_t nb_inst);
 
 #endif /* _PMD_CNXK_CRYPTO_H_ */
-- 
2.25.1