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path: root/drivers/net/virtio/virtqueue.c
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Diffstat (limited to 'drivers/net/virtio/virtqueue.c')
-rw-r--r--drivers/net/virtio/virtqueue.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index 7f60e3ef..4f8707ae 100644
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c
@@ -70,3 +70,28 @@ virtqueue_detatch_unused(struct virtqueue *vq)
}
return NULL;
}
+
+/* Flush the elements in the used ring. */
+void
+virtqueue_flush(struct virtqueue *vq)
+{
+ struct vring_used_elem *uep;
+ struct vq_desc_extra *dxp;
+ uint16_t used_idx, desc_idx;
+ uint16_t nb_used, i;
+
+ nb_used = VIRTQUEUE_NUSED(vq);
+
+ for (i = 0; i < nb_used; i++) {
+ used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
+ uep = &vq->vq_ring.used->ring[used_idx];
+ desc_idx = (uint16_t)uep->id;
+ dxp = &vq->vq_descx[desc_idx];
+ if (dxp->cookie != NULL) {
+ rte_pktmbuf_free(dxp->cookie);
+ dxp->cookie = NULL;
+ }
+ vq->vq_used_cons_idx++;
+ vq_ring_free_chain(vq, desc_idx);
+ }
+}