From: Nipun Gupta <nipun.gupta@nxp.com>
Date: Mon, 30 Sep 2019 08:32:13 +0000 (+0530)
Subject: event/dpaa2: add retry break in packet enqueue
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=68bc970461a14fa2fe53c3c299ac7f243c4f2fed;p=dpdk.git

event/dpaa2: add retry break in packet enqueue

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@nxp.com>
---

diff --git a/drivers/event/dpaa2/dpaa2_eventdev.c b/drivers/event/dpaa2/dpaa2_eventdev.c
index 9255de16fd..834d3cba15 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 @@ skip_linking:
 		}
 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;