[dpdk-dev] [PATCH v4 4/6] event/dpaa2: add retry break in packet enqueue

[Hemant Agrawal]

From: Nipun Gupta <nipun.gupta at nxp.com>

The patch adds the break in the TX function, if it is failing
to send the packets out. Previously the system was trying
infinitely to send packet out.

Signed-off-by: Nipun Gupta <nipun.gupta at nxp.com>
---
 drivers/event/dpaa2/dpaa2_eventdev.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/event/dpaa2/dpaa2_eventdev.c b/drivers/event/dpaa2/dpaa2_eventdev.c
index 9255de16f..834d3cba1 100644
--- a/drivers/event/dpaa2/dpaa2_eventdev.c
+++ b/drivers/event/dpaa2/dpaa2_eventdev.c
@@ -49,6 +49,7 @@
 
 /* Dynamic logging identified for mempool */
 int dpaa2_logtype_event;
+#define DPAA2_EV_TX_RETRY_COUNT 10000
 
 static uint16_t
 dpaa2_eventdev_enqueue_burst(void *port, const struct rte_event ev[],
@@ -59,7 +60,7 @@ dpaa2_eventdev_enqueue_burst(void *port, const struct rte_event ev[],
 	struct dpaa2_dpio_dev *dpio_dev;
 	uint32_t queue_id = ev[0].queue_id;
 	struct dpaa2_eventq *evq_info;
-	uint32_t fqid;
+	uint32_t fqid, retry_count;
 	struct qbman_swp *swp;
 	struct qbman_fd fd_arr[MAX_TX_RING_SLOTS];
 	uint32_t loop, frames_to_send;
@@ -162,13 +163,25 @@ dpaa2_eventdev_enqueue_burst(void *port, const struct rte_event ev[],
 		}
 send_partial:
 		loop = 0;
+		retry_count = 0;
 		while (loop < frames_to_send) {
-			loop += qbman_swp_enqueue_multiple_desc(swp,
+			ret = qbman_swp_enqueue_multiple_desc(swp,
 					&eqdesc[loop], &fd_arr[loop],
 					frames_to_send - loop);
+			if (unlikely(ret < 0)) {
+				retry_count++;
+				if (retry_count > DPAA2_EV_TX_RETRY_COUNT) {
+					num_tx += loop;
+					nb_events -= loop;
+					return num_tx + loop;
+				}
+			} else {
+				loop += ret;
+				retry_count = 0;
+			}
 		}
-		num_tx += frames_to_send;
-		nb_events -= frames_to_send;
+		num_tx += loop;
+		nb_events -= loop;
 	}
 
 	return num_tx;
-- 
2.17.1