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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 /* Enum for virtqueue management. */
55 enum {VIRTIO_RXQ, VIRTIO_TXQ, VIRTIO_QNUM};
58 * Device and vring operations.
60 * Make sure to set VIRTIO_DEV_RUNNING to the device flags in new_device and
61 * remove it in destroy_device.
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);
88 /* Register vhost driver. dev_name could be different for multiple instance support. */
89 int rte_vhost_driver_register(const char *dev_name);
91 /* Unregister vhost driver. This is only meaningful to vhost user. */
92 int rte_vhost_driver_unregister(const char *dev_name);
94 /* Register callbacks. */
95 int rte_vhost_driver_callback_register(struct virtio_net_device_ops const * const);
96 /* Start vhost driver session blocking loop. */
97 int rte_vhost_driver_session_start(void);
100 * Get the numa node from which the virtio net device's memory
104 * virtio-net device ID
107 * The numa node, -1 on failure
109 int rte_vhost_get_numa_node(int vid);
112 * Get the number of queues the device supports.
115 * virtio-net device ID
118 * The number of queues, 0 on failure
120 uint32_t rte_vhost_get_queue_num(int vid);
123 * Get the virtio net device's ifname. For vhost-cuse, ifname is the
124 * path of the char device. For vhost-user, ifname is the vhost-user
128 * virtio-net device ID
130 * The buffer to stored the queried ifname
135 * 0 on success, -1 on failure
137 int rte_vhost_get_ifname(int vid, char *buf, size_t len);
140 * Get how many avail entries are left in the queue
143 * virtio-net device ID
148 * num of avail entires left
150 uint16_t rte_vhost_avail_entries(int vid, uint16_t queue_id);
153 * This function adds buffers to the virtio devices RX virtqueue. Buffers can
154 * be received from the physical port or from another virtual device. A packet
155 * count is returned to indicate the number of packets that were succesfully
156 * added to the RX queue.
158 * virtio-net device ID
160 * virtio queue index in mq case
162 * array to contain packets to be enqueued
164 * packets num to be enqueued
166 * num of packets enqueued
168 uint16_t rte_vhost_enqueue_burst(int vid, uint16_t queue_id,
169 struct rte_mbuf **pkts, uint16_t count);
172 * This function gets guest buffers from the virtio device TX virtqueue,
173 * construct host mbufs, copies guest buffer content to host mbufs and
174 * store them in pkts to be processed.
178 * virtio queue index in mq case
180 * mbuf_pool where host mbuf is allocated.
182 * array to contain packets to be dequeued
184 * packets num to be dequeued
186 * num of packets dequeued
188 uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
189 struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count);
191 #endif /* _VIRTIO_NET_H_ */