cryptodev: add dequeue count parameter in raw API

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.zhang@intel.com>
Acked-by: Akhil Goyal <gakhil@marvell.com>

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) {

doc/guides/rel_notes/release_21_05.rst

@@ -236,6 +236,10 @@ API Changes
 * pci: The value ``PCI_ANY_ID`` is marked as deprecated
   and can be replaced with ``RTE_PCI_ANY_ID``.
 
+* cryptodev: The experimental raw data path API for dequeue
+  ``rte_cryptodev_raw_dequeue_burst`` got a new parameter
+  ``max_nb_to_dequeue`` to provide flexible control on dequeue.
+
 
 ABI Changes
 -----------

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)
@@ -736,9 +737,23 @@ 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);
+	if (get_dequeue_count) {
-	if (unlikely(n == 0))
+		n = get_dequeue_count(resp_opaque);
-		return 0;
+		if (unlikely(n == 0))
+			return 0;
+		else if (n > 1) {
+			head = (head + rx_queue->msg_size * (n - 1)) &
+				rx_queue->modulo_mask;
+			resp = (struct icp_qat_fw_comn_resp *)(
+				(uint8_t *)rx_queue->base_addr + head);
+			if (*(uint32_t *)resp == ADF_RING_EMPTY_SIG)
+				return 0;
+		}
+	} else {
+		if (unlikely(max_nb_to_dequeue == 0))
+			return 0;
+		n = max_nb_to_dequeue;
+	}
 
 	out_user_data[0] = resp_opaque;
 	status = QAT_SYM_DP_IS_RESP_SUCCESS(resp);

lib/librte_cryptodev/rte_cryptodev.c

@@ -2234,13 +2234,14 @@ 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,
+		get_dequeue_count, max_nb_to_dequeue, post_dequeue,
-		is_user_data_array, n_success_jobs, status);
+		out_user_data, is_user_data_array, n_success_jobs, status);
 }
 
 int

lib/librte_cryptodev/rte_cryptodev.h

@@ -1562,6 +1562,9 @@ 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
@@ -1596,6 +1599,7 @@ 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);
@@ -1763,6 +1767,9 @@ 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
@@ -1798,6 +1805,7 @@ __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);