This patch changes the experimental raw data path dequeue burst API.
Originally the API enforces the user to provide callback function
to get maximum dequeue count. This change gives the user one more
option to pass directly the expected dequeue count.

Signed-off-by: Fan Zhang <roy.fan.zh...@intel.com>
---
 app/test/test_cryptodev.c              | 8 +-------
 doc/guides/rel_notes/release_21_05.rst | 2 ++
 drivers/crypto/qat/qat_sym_hw_dp.c     | 4 +++-
 lib/librte_cryptodev/rte_cryptodev.c   | 5 +++--
 lib/librte_cryptodev/rte_cryptodev.h   | 8 ++++++++
 5 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/app/test/test_cryptodev.c b/app/test/test_cryptodev.c
index f91debc16..a91054742 100644
--- a/app/test/test_cryptodev.c
+++ b/app/test/test_cryptodev.c
@@ -162,12 +162,6 @@ ceil_byte_length(uint32_t num_bits)
                return (num_bits >> 3);
 }
 
-static uint32_t
-get_raw_dp_dequeue_count(void *user_data __rte_unused)
-{
-       return 1;
-}
-
 static void
 post_process_raw_dp_op(void *user_data,        uint32_t index __rte_unused,
                uint8_t is_op_success)
@@ -345,7 +339,7 @@ process_sym_raw_dp_op(uint8_t dev_id, uint16_t qp_id,
        n = n_success = 0;
        while (count++ < MAX_RAW_DEQUEUE_COUNT && n == 0) {
                n = rte_cryptodev_raw_dequeue_burst(ctx,
-                       get_raw_dp_dequeue_count, post_process_raw_dp_op,
+                       NULL, 1, post_process_raw_dp_op,
                                (void **)&ret_op, 0, &n_success,
                                &dequeue_status);
                if (dequeue_status < 0) {
diff --git a/doc/guides/rel_notes/release_21_05.rst 
b/doc/guides/rel_notes/release_21_05.rst
index 21dc6d234..b9ca0cc30 100644
--- a/doc/guides/rel_notes/release_21_05.rst
+++ b/doc/guides/rel_notes/release_21_05.rst
@@ -130,6 +130,8 @@ ABI Changes
 
 * No ABI change that would break compatibility with 20.11.
 
+* cryptodev: the function ``rte_cryptodev_raw_dequeue_burst`` is added a
+  parameter ``max_nb_to_dequeue`` to give user a more flexible dequeue control.
 
 Known Issues
 ------------
diff --git a/drivers/crypto/qat/qat_sym_hw_dp.c 
b/drivers/crypto/qat/qat_sym_hw_dp.c
index 01afb883e..e075f3ec2 100644
--- a/drivers/crypto/qat/qat_sym_hw_dp.c
+++ b/drivers/crypto/qat/qat_sym_hw_dp.c
@@ -707,6 +707,7 @@ qat_sym_dp_enqueue_chain_jobs(void *qp_data, uint8_t 
*drv_ctx,
 static __rte_always_inline uint32_t
 qat_sym_dp_dequeue_burst(void *qp_data, uint8_t *drv_ctx,
        rte_cryptodev_raw_get_dequeue_count_t get_dequeue_count,
+       uint32_t max_nb_to_dequeue,
        rte_cryptodev_raw_post_dequeue_t post_dequeue,
        void **out_user_data, uint8_t is_user_data_array,
        uint32_t *n_success_jobs, int *return_status)
@@ -736,7 +737,8 @@ qat_sym_dp_dequeue_burst(void *qp_data, uint8_t *drv_ctx,
 
        resp_opaque = (void *)(uintptr_t)resp->opaque_data;
        /* get the dequeue count */
-       n = get_dequeue_count(resp_opaque);
+       n = get_dequeue_count != NULL ? get_dequeue_count(resp_opaque) :
+               max_nb_to_dequeue;
        if (unlikely(n == 0))
                return 0;
 
diff --git a/lib/librte_cryptodev/rte_cryptodev.c 
b/lib/librte_cryptodev/rte_cryptodev.c
index 40f55a3cd..0c16b04f8 100644
--- a/lib/librte_cryptodev/rte_cryptodev.c
+++ b/lib/librte_cryptodev/rte_cryptodev.c
@@ -2232,13 +2232,14 @@ rte_cryptodev_raw_enqueue_done(struct 
rte_crypto_raw_dp_ctx *ctx,
 uint32_t
 rte_cryptodev_raw_dequeue_burst(struct rte_crypto_raw_dp_ctx *ctx,
        rte_cryptodev_raw_get_dequeue_count_t get_dequeue_count,
+       uint32_t max_nb_to_dequeue,
        rte_cryptodev_raw_post_dequeue_t post_dequeue,
        void **out_user_data, uint8_t is_user_data_array,
        uint32_t *n_success_jobs, int *status)
 {
        return (*ctx->dequeue_burst)(ctx->qp_data, ctx->drv_ctx_data,
-               get_dequeue_count, post_dequeue, out_user_data,
-               is_user_data_array, n_success_jobs, status);
+               get_dequeue_count, max_nb_to_dequeue, post_dequeue,
+               out_user_data, is_user_data_array, n_success_jobs, status);
 }
 
 int
diff --git a/lib/librte_cryptodev/rte_cryptodev.h 
b/lib/librte_cryptodev/rte_cryptodev.h
index ae34f33f6..b2a125511 100644
--- a/lib/librte_cryptodev/rte_cryptodev.h
+++ b/lib/librte_cryptodev/rte_cryptodev.h
@@ -1546,6 +1546,9 @@ typedef void (*rte_cryptodev_raw_post_dequeue_t)(void 
*user_data,
  * @param      drv_ctx                 Driver specific context data.
  * @param      get_dequeue_count       User provided callback function to
  *                                     obtain dequeue operation count.
+ * @param      max_nb_to_dequeue       When get_dequeue_count is NULL this
+ *                                     value is used to pass the maximum
+ *                                     number of operations to be dequeued.
  * @param      post_dequeue            User provided callback function to
  *                                     post-process a dequeued operation.
  * @param      out_user_data           User data pointer array to be retrieve
@@ -1580,6 +1583,7 @@ typedef void (*rte_cryptodev_raw_post_dequeue_t)(void 
*user_data,
 typedef uint32_t (*cryptodev_sym_raw_dequeue_burst_t)(void *qp,
        uint8_t *drv_ctx,
        rte_cryptodev_raw_get_dequeue_count_t get_dequeue_count,
+       uint32_t max_nb_to_dequeue,
        rte_cryptodev_raw_post_dequeue_t post_dequeue,
        void **out_user_data, uint8_t is_user_data_array,
        uint32_t *n_success, int *dequeue_status);
@@ -1747,6 +1751,9 @@ rte_cryptodev_raw_enqueue_done(struct 
rte_crypto_raw_dp_ctx *ctx,
  *                                     data.
  * @param      get_dequeue_count       User provided callback function to
  *                                     obtain dequeue operation count.
+ * @param      max_nb_to_dequeue       When get_dequeue_count is NULL this
+ *                                     value is used to pass the maximum
+ *                                     number of operations to be dequeued.
  * @param      post_dequeue            User provided callback function to
  *                                     post-process a dequeued operation.
  * @param      out_user_data           User data pointer array to be retrieve
@@ -1782,6 +1789,7 @@ __rte_experimental
 uint32_t
 rte_cryptodev_raw_dequeue_burst(struct rte_crypto_raw_dp_ctx *ctx,
        rte_cryptodev_raw_get_dequeue_count_t get_dequeue_count,
+       uint32_t max_nb_to_dequeue,
        rte_cryptodev_raw_post_dequeue_t post_dequeue,
        void **out_user_data, uint8_t is_user_data_array,
        uint32_t *n_success, int *dequeue_status);
-- 
2.25.1

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