vhost: support interrupt mode

[dpdk.git] / lib / librte_vhost / vhost.c

diff --git a/lib/librte_vhost/vhost.c b/lib/librte_vhost/vhost.c
index b1afd69..5ddf55e 100644 (file)
--- a/lib/librte_vhost/vhost.c
+++ b/lib/librte_vhost/vhost.c
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: BSD-3-Clause
- * Copyright(c) 2010-2016 Intel Corporation
+ * Copyright(c) 2010-2017 Intel Corporation
  */
 
 #include <linux/vhost.h>
@@ -577,16 +577,14 @@ rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable)
 {
        struct virtio_net *dev = get_device(vid);
 
-       if (dev == NULL)
-               return -1;
-
-       if (enable) {
-               RTE_LOG(ERR, VHOST_CONFIG,
-                       "guest notification isn't supported.\n");
+       if (!dev)
                return -1;
-       }
 
-       dev->virtqueue[queue_id]->used->flags = VRING_USED_F_NO_NOTIFY;
+       if (enable)
+               dev->virtqueue[queue_id]->used->flags &=
+                       ~VRING_USED_F_NO_NOTIFY;
+       else
+               dev->virtqueue[queue_id]->used->flags |= VRING_USED_F_NO_NOTIFY;
        return 0;
 }
 
@@ -656,3 +654,66 @@ int rte_vhost_get_vdpa_device_id(int vid)
 
        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)
+               return -1;
+
+       if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+               RTE_LOG(ERR, VHOST_DATA,
+                       "(%d) %s: built-in vhost net backend is disabled.\n",
+                       dev->vid, __func__);
+               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)
+               return -1;
+
+       if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+               RTE_LOG(ERR, VHOST_DATA,
+                       "(%d) %s: built-in vhost net backend is disabled.\n",
+                       dev->vid, __func__);
+               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;
+
+       if (unlikely(!(dev->flags & VIRTIO_DEV_BUILTIN_VIRTIO_NET))) {
+               RTE_LOG(ERR, VHOST_DATA,
+                       "(%d) %s: built-in vhost net backend is disabled.\n",
+                       dev->vid, __func__);
+               return -1;
+       }
+
+       dev->virtqueue[queue_id]->last_avail_idx = last_avail_idx;
+       dev->virtqueue[queue_id]->last_used_idx = last_used_idx;
+
+       return 0;
+}