[dpdk-dev] [RFC v2 2/3] event/dsw: make use of eventdev maintenance facility

["Mattias Rönnblom" <mattias.ronnblom@ericsson.com>]

Set the RTE_EVENT_DEV_CAP_REQUIRES_MAINT flag, and perform DSW
background tasks on rte_event_maintain() calls.

RFC v2: Have dsw_event_maintain() occasionally flush the port output
        buffers.

Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
Tested-by: Richard Eklycke <richard.eklycke@ericsson.com>
Tested-by: Liron Himi <lironh@marvell.com>
---
 drivers/event/dsw/dsw_evdev.c | 4 +++-
 drivers/event/dsw/dsw_evdev.h | 1 +
 drivers/event/dsw/dsw_event.c | 9 +++++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/event/dsw/dsw_evdev.c b/drivers/event/dsw/dsw_evdev.c
index 2301a4b7a0..713a75bce8 100644
--- a/drivers/event/dsw/dsw_evdev.c
+++ b/drivers/event/dsw/dsw_evdev.c
@@ -222,7 +222,8 @@ dsw_info_get(struct rte_eventdev *dev __rte_unused,
 		RTE_EVENT_DEV_CAP_DISTRIBUTED_SCHED|
 		RTE_EVENT_DEV_CAP_NONSEQ_MODE|
 		RTE_EVENT_DEV_CAP_MULTIPLE_QUEUE_PORT|
-		RTE_EVENT_DEV_CAP_CARRY_FLOW_ID
+		RTE_EVENT_DEV_CAP_CARRY_FLOW_ID|
+		RTE_EVENT_DEV_CAP_REQUIRES_MAINT
 	};
 }
 
@@ -441,6 +442,7 @@ dsw_probe(struct rte_vdev_device *vdev)
 	dev->enqueue_forward_burst = dsw_event_enqueue_forward_burst;
 	dev->dequeue = dsw_event_dequeue;
 	dev->dequeue_burst = dsw_event_dequeue_burst;
+	dev->maintain = dsw_event_maintain;
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return 0;
diff --git a/drivers/event/dsw/dsw_evdev.h b/drivers/event/dsw/dsw_evdev.h
index 08889a0990..9769d9740e 100644
--- a/drivers/event/dsw/dsw_evdev.h
+++ b/drivers/event/dsw/dsw_evdev.h
@@ -269,6 +269,7 @@ uint16_t dsw_event_enqueue_forward_burst(void *port,
 uint16_t dsw_event_dequeue(void *port, struct rte_event *ev, uint64_t wait);
 uint16_t dsw_event_dequeue_burst(void *port, struct rte_event *events,
 				 uint16_t num, uint64_t wait);
+void dsw_event_maintain(void *port);
 
 int dsw_xstats_get_names(const struct rte_eventdev *dev,
 			 enum rte_event_dev_xstats_mode mode,
diff --git a/drivers/event/dsw/dsw_event.c b/drivers/event/dsw/dsw_event.c
index 1f09816945..f16d9d463b 100644
--- a/drivers/event/dsw/dsw_event.c
+++ b/drivers/event/dsw/dsw_event.c
@@ -1400,3 +1400,12 @@ dsw_event_dequeue_burst(void *port, struct rte_event *events, uint16_t num,
 
 	return dequeued;
 }
+
+void dsw_event_maintain(void *port)
+{
+	struct dsw_port *source_port = port;
+	struct dsw_evdev *dsw = source_port->dsw;
+
+	dsw_port_note_op(source_port, 0);
+	dsw_port_bg_process(dsw, source_port);
+}
-- 
2.25.1