[PATCH v4 02/30] baseband/acc100: add function to check AQ availability

[Hernan Vargas]

It is possible for some corner case to run more batch enqueue than
supported. A protection is required to avoid that corner case.
Enhance all ACC100 enqueue operations with check to see if there is room
in the atomic queue for enqueueing batches into the queue manager
Check room in AQ for the enqueues batches into Qmgr

Fixes: 5ad5060f8f7 ("baseband/acc100: add LDPC processing functions")
Cc: stable at dpdk.org

Signed-off-by: Hernan Vargas <hernan.vargas at intel.com>
---
 drivers/baseband/acc/rte_acc100_pmd.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/baseband/acc/rte_acc100_pmd.c b/drivers/baseband/acc/rte_acc100_pmd.c
index 3b0c8e41dc..7fec2283eb 100644
--- a/drivers/baseband/acc/rte_acc100_pmd.c
+++ b/drivers/baseband/acc/rte_acc100_pmd.c
@@ -2983,7 +2983,8 @@ static uint16_t
 acc100_enqueue_enc(struct rte_bbdev_queue_data *q_data,
 		struct rte_bbdev_enc_op **ops, uint16_t num)
 {
-	if (unlikely(num == 0))
+	int32_t aq_avail = acc_aq_avail(q_data, num);
+	if (unlikely((aq_avail <= 0) || (num == 0)))
 		return 0;
 	if (ops[0]->turbo_enc.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
 		return acc100_enqueue_enc_tb(q_data, ops, num);
@@ -2996,7 +2997,8 @@ static uint16_t
 acc100_enqueue_ldpc_enc(struct rte_bbdev_queue_data *q_data,
 		struct rte_bbdev_enc_op **ops, uint16_t num)
 {
-	if (unlikely(num == 0))
+	int32_t aq_avail = acc_aq_avail(q_data, num);
+	if (unlikely((aq_avail <= 0) || (num == 0)))
 		return 0;
 	if (ops[0]->ldpc_enc.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
 		return acc100_enqueue_enc_tb(q_data, ops, num);
@@ -3164,8 +3166,11 @@ static uint16_t
 acc100_enqueue_dec(struct rte_bbdev_queue_data *q_data,
 		struct rte_bbdev_dec_op **ops, uint16_t num)
 {
-	if (unlikely(num == 0))
+	int32_t aq_avail = acc_aq_avail(q_data, num);
+
+	if (unlikely((aq_avail <= 0) || (num == 0)))
 		return 0;
+
 	if (ops[0]->turbo_dec.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
 		return acc100_enqueue_dec_tb(q_data, ops, num);
 	else
@@ -3177,11 +3182,9 @@ static uint16_t
 acc100_enqueue_ldpc_dec(struct rte_bbdev_queue_data *q_data,
 		struct rte_bbdev_dec_op **ops, uint16_t num)
 {
-	struct acc_queue *q = q_data->queue_private;
-	int32_t aq_avail = q->aq_depth +
-			(q->aq_dequeued - q->aq_enqueued) / 128;
+	int32_t aq_avail = acc_aq_avail(q_data, num);
 
-	if (unlikely((aq_avail == 0) || (num == 0)))
+	if (unlikely((aq_avail <= 0) || (num == 0)))
 		return 0;
 
 	if (ops[0]->ldpc_dec.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
@@ -3190,7 +3193,6 @@ acc100_enqueue_ldpc_dec(struct rte_bbdev_queue_data *q_data,
 		return acc100_enqueue_ldpc_dec_cb(q_data, ops, num);
 }
 
-
 /* Dequeue one encode operations from ACC100 device in CB mode */
 static inline int
 dequeue_enc_one_op_cb(struct acc_queue *q, struct rte_bbdev_enc_op **ref_op,
-- 
2.37.1