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34 #ifndef _VIRTIO_NET_H_
35 #define _VIRTIO_NET_H_
39 * Interface to vhost net
43 #include <linux/vhost.h>
44 #include <linux/virtio_ring.h>
45 #include <linux/virtio_net.h>
46 #include <sys/eventfd.h>
47 #include <sys/socket.h>
50 #include <rte_memory.h>
51 #include <rte_mempool.h>
52 #include <rte_ether.h>
54 #define RTE_VHOST_USER_CLIENT (1ULL << 0)
55 #define RTE_VHOST_USER_NO_RECONNECT (1ULL << 1)
57 /* Enum for virtqueue management. */
58 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
61 * Device and vring operations.
63 struct virtio_net_device_ops {
64 int (*new_device)(int vid); /**< Add device. */
65 void (*destroy_device)(int vid); /**< Remove device. */
67 int (*vring_state_changed)(int vid, uint16_t queue_id, int enable); /**< triggered when a vring is enabled or disabled */
69 void *reserved[5]; /**< Reserved for future extension */
73 * Disable features in feature_mask. Returns 0 on success.
75 int rte_vhost_feature_disable(uint64_t feature_mask);
78 * Enable features in feature_mask. Returns 0 on success.
80 int rte_vhost_feature_enable(uint64_t feature_mask);
82 /* Returns currently supported vhost features */
83 uint64_t rte_vhost_feature_get(void);
85 int rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable);
88 * Register vhost driver. path could be different for multiple
91 int rte_vhost_driver_register(const char *path, uint64_t flags);
93 /* Unregister vhost driver. This is only meaningful to vhost user. */
94 int rte_vhost_driver_unregister(const char *path);
96 /* Register callbacks. */
97 int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const);
98 /* Start vhost driver session blocking loop. */
99 int rte_vhost_driver_session_start(void);
102 * Get the numa node from which the virtio net device's memory
106 * virtio-net device ID
109 * The numa node, -1 on failure
111 int rte_vhost_get_numa_node(int vid);
114 * Get the number of queues the device supports.
117 * virtio-net device ID
120 * The number of queues, 0 on failure
122 uint32_t rte_vhost_get_queue_num(int vid);
125 * Get the virtio net device's ifname. For vhost-cuse, ifname is the
126 * path of the char device. For vhost-user, ifname is the vhost-user
130 * virtio-net device ID
132 * The buffer to stored the queried ifname
137 * 0 on success, -1 on failure
139 int rte_vhost_get_ifname(int vid, char *buf, size_t len);
142 * Get how many avail entries are left in the queue
145 * virtio-net device ID
150 * num of avail entires left
152 uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
155 * This function adds buffers to the virtio devices RX virtqueue. Buffers can
156 * be received from the physical port or from another virtual device. A packet
157 * count is returned to indicate the number of packets that were succesfully
158 * added to the RX queue.
160 * virtio-net device ID
162 * virtio queue index in mq case
164 * array to contain packets to be enqueued
166 * packets num to be enqueued
168 * num of packets enqueued
170 uint16_t rte_vhost_enqueue_burst(int vid, uint16_t queue_id,
171 struct rte_mbuf **pkts, uint16_t count);
174 * This function gets guest buffers from the virtio device TX virtqueue,
175 * construct host mbufs, copies guest buffer content to host mbufs and
176 * store them in pkts to be processed.
180 * virtio queue index in mq case
182 * mbuf_pool where host mbuf is allocated.
184 * array to contain packets to be dequeued
186 * packets num to be dequeued
188 * num of packets dequeued
190 uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
191 struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count);
193 #endif /* _VIRTIO_NET_H_ */