vhost: adapt library for selective datapath

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

diff --git a/lib/librte_vhost/socket.c b/lib/librte_vhost/socket.c
index b26bdb0..636fc25 100644 (file)
--- a/lib/librte_vhost/socket.c
+++ b/lib/librte_vhost/socket.c
@@ -215,6 +215,8 @@ vhost_user_add_connection(int fd, struct vhost_user_socket *vsocket)
 
        vhost_set_builtin_virtio_net(vid, vsocket->use_builtin_virtio_net);
 
+       vhost_attach_vdpa_device(vid, vsocket->vdpa_dev_id);
+
        if (vsocket->dequeue_zero_copy)
                vhost_enable_dequeue_zero_copy(vid);
 
@@ -666,20 +668,123 @@ int
 rte_vhost_driver_get_features(const char *path, uint64_t *features)
 {
        struct vhost_user_socket *vsocket;
+       uint64_t vdpa_features;
+       struct rte_vdpa_device *vdpa_dev;
+       int did = -1;
+       int ret = 0;
 
        pthread_mutex_lock(&vhost_user.mutex);
        vsocket = find_vhost_user_socket(path);
-       if (vsocket)
+       if (!vsocket) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                       "socket file %s is not registered yet.\n", path);
+               ret = -1;
+               goto unlock_exit;
+       }
+
+       did = vsocket->vdpa_dev_id;
+       vdpa_dev = rte_vdpa_get_device(did);
+       if (!vdpa_dev || !vdpa_dev->ops->get_features) {
                *features = vsocket->features;
+               goto unlock_exit;
+       }
+
+       if (vdpa_dev->ops->get_features(did, &vdpa_features) < 0) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                               "failed to get vdpa features "
+                               "for socket file %s.\n", path);
+               ret = -1;
+               goto unlock_exit;
+       }
+
+       *features = vsocket->features & vdpa_features;
+
+unlock_exit:
        pthread_mutex_unlock(&vhost_user.mutex);
+       return ret;
+}
 
+int
+rte_vhost_driver_get_protocol_features(const char *path,
+               uint64_t *protocol_features)
+{
+       struct vhost_user_socket *vsocket;
+       uint64_t vdpa_protocol_features;
+       struct rte_vdpa_device *vdpa_dev;
+       int did = -1;
+       int ret = 0;
+
+       pthread_mutex_lock(&vhost_user.mutex);
+       vsocket = find_vhost_user_socket(path);
        if (!vsocket) {
                RTE_LOG(ERR, VHOST_CONFIG,
                        "socket file %s is not registered yet.\n", path);
-               return -1;
-       } else {
-               return 0;
+               ret = -1;
+               goto unlock_exit;
        }
+
+       did = vsocket->vdpa_dev_id;
+       vdpa_dev = rte_vdpa_get_device(did);
+       if (!vdpa_dev || !vdpa_dev->ops->get_protocol_features) {
+               *protocol_features = VHOST_USER_PROTOCOL_FEATURES;
+               goto unlock_exit;
+       }
+
+       if (vdpa_dev->ops->get_protocol_features(did,
+                               &vdpa_protocol_features) < 0) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                               "failed to get vdpa protocol features "
+                               "for socket file %s.\n", path);
+               ret = -1;
+               goto unlock_exit;
+       }
+
+       *protocol_features = VHOST_USER_PROTOCOL_FEATURES
+               & vdpa_protocol_features;
+
+unlock_exit:
+       pthread_mutex_unlock(&vhost_user.mutex);
+       return ret;
+}
+
+int
+rte_vhost_driver_get_queue_num(const char *path, uint32_t *queue_num)
+{
+       struct vhost_user_socket *vsocket;
+       uint32_t vdpa_queue_num;
+       struct rte_vdpa_device *vdpa_dev;
+       int did = -1;
+       int ret = 0;
+
+       pthread_mutex_lock(&vhost_user.mutex);
+       vsocket = find_vhost_user_socket(path);
+       if (!vsocket) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                       "socket file %s is not registered yet.\n", path);
+               ret = -1;
+               goto unlock_exit;
+       }
+
+       did = vsocket->vdpa_dev_id;
+       vdpa_dev = rte_vdpa_get_device(did);
+       if (!vdpa_dev || !vdpa_dev->ops->get_queue_num) {
+               *queue_num = VHOST_MAX_QUEUE_PAIRS;
+               goto unlock_exit;
+       }
+
+       if (vdpa_dev->ops->get_queue_num(did, &vdpa_queue_num) < 0) {
+               RTE_LOG(ERR, VHOST_CONFIG,
+                               "failed to get vdpa queue number "
+                               "for socket file %s.\n", path);
+               ret = -1;
+               goto unlock_exit;
+       }
+
+       *queue_num = RTE_MIN((uint32_t)VHOST_MAX_QUEUE_PAIRS, vdpa_queue_num);
+
+unlock_exit:
+       pthread_mutex_unlock(&vhost_user.mutex);
+       return ret;
 }
 
 /*