+
+uint32_t
+rte_vhost_rx_queue_count(int vid, uint16_t qid)
+{
+ struct virtio_net *dev;
+ struct vhost_virtqueue *vq;
+
+ dev = get_device(vid);
+ if (dev == NULL)
+ return 0;
+
+ if (unlikely(qid >= dev->nr_vring || (qid & 1) == 0)) {
+ RTE_LOG(ERR, VHOST_DATA, "(%d) %s: invalid virtqueue idx %d.\n",
+ dev->vid, __func__, qid);
+ return 0;
+ }
+
+ vq = dev->virtqueue[qid];
+ if (vq == NULL)
+ return 0;
+
+ if (unlikely(vq->enabled == 0 || vq->avail == NULL))
+ return 0;
+
+ return *((volatile uint16_t *)&vq->avail->idx) - vq->last_avail_idx;
+}
+
+int rte_vhost_get_vdpa_device_id(int vid)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL)
+ return -1;
+
+ return dev->vdpa_dev_id;
+}
+
+int rte_vhost_get_log_base(int vid, uint64_t *log_base,
+ uint64_t *log_size)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || log_base == NULL || log_size == NULL)
+ return -1;
+
+ *log_base = dev->log_base;
+ *log_size = dev->log_size;
+
+ return 0;
+}
+
+int rte_vhost_get_vring_base(int vid, uint16_t queue_id,
+ uint16_t *last_avail_idx, uint16_t *last_used_idx)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || last_avail_idx == NULL || last_used_idx == NULL)
+ return -1;
+
+ *last_avail_idx = dev->virtqueue[queue_id]->last_avail_idx;
+ *last_used_idx = dev->virtqueue[queue_id]->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 virtio_net *dev = get_device(vid);
+
+ if (!dev)
+ return -1;
+
+ dev->virtqueue[queue_id]->last_avail_idx = last_avail_idx;
+ dev->virtqueue[queue_id]->last_used_idx = last_used_idx;
+
+ return 0;
+}
+
+int rte_vhost_extern_callback_register(int vid,
+ struct rte_vhost_user_extern_ops const * const ops, void *ctx)
+{
+ struct virtio_net *dev = get_device(vid);
+
+ if (dev == NULL || ops == NULL)
+ return -1;
+
+ dev->extern_ops = *ops;
+ dev->extern_data = ctx;
+ return 0;
+}