+ 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;
+ }
+
+ return 0;
+}
+
+int
+rte_vhost_get_vring_base_from_inflight(int vid,
+ uint16_t queue_id,
+ uint16_t *last_avail_idx,
+ uint16_t *last_used_idx)
+{
+ struct rte_vhost_inflight_info_packed *inflight_info;
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL)
+ return -1;
+
+ if (!vq_is_packed(dev))
+ return -1;
+
+ inflight_info = dev->virtqueue[queue_id]->inflight_packed;
+ if (!inflight_info)
+ return -1;
+
+ *last_avail_idx = (inflight_info->old_used_wrap_counter << 15) |
+ inflight_info->old_used_idx;
+ *last_used_idx = *last_avail_idx;