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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)
56 #define RTE_VHOST_USER_DEQUEUE_ZERO_COPY (1ULL << 2)
58 /* Enum for virtqueue management. */
59 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
62 * Device and vring operations.
64 struct virtio_net_device_ops {
65 int (*new_device)(int vid); /**< Add device. */
66 void (*destroy_device)(int vid); /**< Remove device. */
68 int (*vring_state_changed)(int vid, uint16_t queue_id, int enable); /**< triggered when a vring is enabled or disabled */
70 void *reserved[5]; /**< Reserved for future extension */
74 * Disable features in feature_mask. Returns 0 on success.
76 int rte_vhost_feature_disable(uint64_t feature_mask);
79 * Enable features in feature_mask. Returns 0 on success.
81 int rte_vhost_feature_enable(uint64_t feature_mask);
83 /* Returns currently supported vhost features */
84 uint64_t rte_vhost_feature_get(void);
86 int rte_vhost_enable_guest_notification(int vid, uint16_t queue_id, int enable);
89 * Register vhost driver. path could be different for multiple
92 int rte_vhost_driver_register(const char *path, uint64_t flags);
94 /* Unregister vhost driver. This is only meaningful to vhost user. */
95 int rte_vhost_driver_unregister(const char *path);
97 /* Register callbacks. */
98 int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const);
99 /* Start vhost driver session blocking loop. */
100 int rte_vhost_driver_session_start(void);
103 * Get the MTU value of the device if set in QEMU.
106 * virtio-net device ID
108 * The variable to store the MTU value
112 * -EAGAIN: device not yet started
113 * -ENOTSUP: device does not support MTU feature
115 int rte_vhost_get_mtu(int vid, uint16_t *mtu);
118 * Get the numa node from which the virtio net device's memory
122 * virtio-net device ID
125 * The numa node, -1 on failure
127 int rte_vhost_get_numa_node(int vid);
130 * Get the number of queues the device supports.
133 * virtio-net device ID
136 * The number of queues, 0 on failure
138 uint32_t rte_vhost_get_queue_num(int vid);
141 * Get the virtio net device's ifname, which is the vhost-user socket
145 * virtio-net device ID
147 * The buffer to stored the queried ifname
152 * 0 on success, -1 on failure
154 int rte_vhost_get_ifname(int vid, char *buf, size_t len);
157 * Get how many avail entries are left in the queue
160 * virtio-net device ID
165 * num of avail entires left
167 uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
170 * This function adds buffers to the virtio devices RX virtqueue. Buffers can
171 * be received from the physical port or from another virtual device. A packet
172 * count is returned to indicate the number of packets that were succesfully
173 * added to the RX queue.
175 * virtio-net device ID
177 * virtio queue index in mq case
179 * array to contain packets to be enqueued
181 * packets num to be enqueued
183 * num of packets enqueued
185 uint16_t rte_vhost_enqueue_burst(int vid, uint16_t queue_id,
186 struct rte_mbuf **pkts, uint16_t count);
189 * This function gets guest buffers from the virtio device TX virtqueue,
190 * construct host mbufs, copies guest buffer content to host mbufs and
191 * store them in pkts to be processed.
195 * virtio queue index in mq case
197 * mbuf_pool where host mbuf is allocated.
199 * array to contain packets to be dequeued
201 * packets num to be dequeued
203 * num of packets dequeued
205 uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
206 struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count);
208 #endif /* _VIRTIO_NET_H_ */