+ vq = dev->virtqueue[queue_id];
+ if (!vq)
+ return -1;
+
+ if (vq_is_packed(dev)) {
+ *last_avail_idx = (vq->avail_wrap_counter << 15) |
+ vq->last_avail_idx;
+ *last_used_idx = (vq->used_wrap_counter << 15) |
+ vq->last_used_idx;
+ } else {
+ *last_avail_idx = vq->last_avail_idx;
+ *last_used_idx = vq->last_used_idx;
+ }
+
+ return 0;
+}
+
+int rte_vhost_set_vring_base(int vid, uint16_t queue_id,
+ uint16_t last_avail_idx, uint16_t last_used_idx)
+{
+ struct vhost_virtqueue *vq;
+ struct virtio_net *dev = get_device(vid);
+
+ if (!dev)
+ return -1;
+
+ vq = dev->virtqueue[queue_id];
+ if (!vq)
+ return -1;
+
+ if (vq_is_packed(dev)) {
+ vq->last_avail_idx = last_avail_idx & 0x7fff;
+ vq->avail_wrap_counter = !!(last_avail_idx & (1 << 15));
+ vq->last_used_idx = last_used_idx & 0x7fff;
+ vq->used_wrap_counter = !!(last_used_idx & (1 << 15));
+ } else {
+ vq->last_avail_idx = last_avail_idx;
+ vq->last_used_idx = last_used_idx;
+ }