[dpdk-dev] [PATCH v3] eventdev: use links map to unlink queues

[Pavan Nikhilesh]

The octeontx event device doesn't store the queues to port mapping as a
result it cannot return the exact number of queues unlinked from a port
when application wants to unlink all the queues mapped (supplies queues
param as NULL).

Using links_map we can determine the exact queues mapped to a specific
port and unlink them.

Signed-off-by: Pavan Nikhilesh <pbhagavatula at caviumnetworks.com>
Acked-by: Gage Eads <gage.eads at intel.com>
---

 v3 Changes:
  - Clean up unneeded variables.

 v2 Changes:
  - Fixed issue when invalid queue exists in between valid queue id's of the
  queue list.

 lib/librte_eventdev/rte_eventdev.c | 27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/lib/librte_eventdev/rte_eventdev.c b/lib/librte_eventdev/rte_eventdev.c
index e0c2a7876..fec252bf1 100644
--- a/lib/librte_eventdev/rte_eventdev.c
+++ b/lib/librte_eventdev/rte_eventdev.c
@@ -888,7 +888,7 @@ rte_event_port_unlink(uint8_t dev_id, uint8_t port_id,
 {
 	struct rte_eventdev *dev;
 	uint8_t all_queues[RTE_EVENT_MAX_QUEUES_PER_DEV];
-	int i, diag;
+	int i, diag, j;
 	uint16_t *links_map;

 	RTE_EVENTDEV_VALID_DEVID_OR_ERRNO_RET(dev_id, -EINVAL, 0);
@@ -906,13 +906,29 @@ rte_event_port_unlink(uint8_t dev_id, uint8_t port_id,
 		return 0;
 	}

+	links_map = dev->data->links_map;
+	/* Point links_map to this port specific area */
+	links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
+
 	if (queues == NULL) {
-		for (i = 0; i < dev->data->nb_queues; i++)
-			all_queues[i] = i;
+		j = 0;
+		for (i = 0; i < dev->data->nb_queues; i++) {
+			if (links_map[i] !=
+					EVENT_QUEUE_SERVICE_PRIORITY_INVALID) {
+				all_queues[j] = i;
+				j++;
+			}
+		}
 		queues = all_queues;
-		nb_unlinks = dev->data->nb_queues;
+	} else {
+		for (j = 0; j < nb_unlinks; j++) {
+			if (links_map[queues[j]] ==
+					EVENT_QUEUE_SERVICE_PRIORITY_INVALID)
+				break;
+		}
 	}

+	nb_unlinks = j;
 	for (i = 0; i < nb_unlinks; i++)
 		if (queues[i] >= dev->data->nb_queues) {
 			rte_errno = -EINVAL;
@@ -925,9 +941,6 @@ rte_event_port_unlink(uint8_t dev_id, uint8_t port_id,
 	if (diag < 0)
 		return diag;

-	links_map = dev->data->links_map;
-	/* Point links_map to this port specific area */
-	links_map += (port_id * RTE_EVENT_MAX_QUEUES_PER_DEV);
 	for (i = 0; i < diag; i++)
 		links_map[queues[i]] = EVENT_QUEUE_SERVICE_PRIORITY_INVALID;

--
2.14.1