[dpdk-dev] [PATCH 1/2] vhost: support to clear in-flight packets for async dequeue

[Yuan Wang <yuanx.wang@intel.com>]

rte_vhost_clear_queue_thread_unsafe() supports to clear
in-flight packets for async enqueue only. But after
supporting async dequeue, this API should support async dequeue too.

Signed-off-by: Yuan Wang <yuanx.wang@intel.com>
---
 lib/vhost/virtio_net.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index e0159b53e3..7f6183a929 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -27,6 +27,11 @@
 
 #define VHOST_ASYNC_BATCH_THRESHOLD 32
 
+static __rte_always_inline uint16_t
+async_poll_dequeue_completed_split(struct virtio_net *dev,
+		struct vhost_virtqueue *vq, uint16_t queue_id,
+		struct rte_mbuf **pkts, uint16_t count, bool legacy_ol_flags);
+
 static  __rte_always_inline bool
 rxvq_is_mergeable(struct virtio_net *dev)
 {
@@ -2119,11 +2124,6 @@ rte_vhost_clear_queue_thread_unsafe(int vid, uint16_t queue_id,
 		return 0;
 
 	VHOST_LOG_DATA(DEBUG, "(%d) %s\n", dev->vid, __func__);
-	if (unlikely(!is_valid_virt_queue_idx(queue_id, 0, dev->nr_vring))) {
-		VHOST_LOG_DATA(ERR, "(%d) %s: invalid virtqueue idx %d.\n",
-			dev->vid, __func__, queue_id);
-		return 0;
-	}
 
 	vq = dev->virtqueue[queue_id];
 
@@ -2133,7 +2133,11 @@ rte_vhost_clear_queue_thread_unsafe(int vid, uint16_t queue_id,
 		return 0;
 	}
 
-	n_pkts_cpl = vhost_poll_enqueue_completed(dev, queue_id, pkts, count);
+	if ((queue_id % 2) == 0)
+		n_pkts_cpl = vhost_poll_enqueue_completed(dev, queue_id, pkts, count);
+	else
+		n_pkts_cpl = async_poll_dequeue_completed_split(dev, vq, queue_id, pkts, count,
+						dev->flags & VIRTIO_DEV_LEGACY_OL_FLAGS);
 
 	return n_pkts_cpl;
 }
-- 
2.25.1