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34 #ifndef _VIRTIO_NET_H_
35 #define _VIRTIO_NET_H_
39 #define VQ_DESC_NUM 256
40 /* Used to indicate that the device is running on a data core */
41 #define VIRTIO_DEV_RUNNING 1
44 * Structure contains variables relevant to TX/RX virtqueues.
46 struct vhost_virtqueue
48 struct vring_desc *desc; /* Virtqueue descriptor ring. */
49 struct vring_avail *avail; /* Virtqueue available ring. */
50 struct vring_used *used; /* Virtqueue used ring. */
51 uint32_t size; /* Size of descriptor ring. */
52 uint32_t vhost_hlen; /* Vhost header length (varies depending on RX merge buffers. */
53 volatile uint16_t last_used_idx; /* Last index used on the available ring */
54 volatile uint16_t last_used_idx_res; /* Used for multiple devices reserving buffers. */
55 } __rte_cache_aligned;
58 * Device structure contains all configuration information relating to the device.
62 struct vhost_virtqueue *virtqueue_tx; /* Contains all TX virtqueue information. */
63 struct vhost_virtqueue *virtqueue_rx; /* Contains all RX virtqueue information. */
64 struct virtio_memory *mem; /* QEMU memory and memory region information. */
65 struct ether_addr mac_address; /* Device MAC address (Obtained on first TX packet). */
66 uint32_t flags; /* Device flags. Only used to check if device is running on data core. */
67 uint32_t vlan_tag; /* Vlan tag for device. Currently set to device_id (0-63). */
69 uint64_t device_fh; /* device identifier. */
71 volatile uint8_t ready; /* A device is set as ready if the MAC address has been set. */
72 volatile uint8_t remove; /* Device is marked for removal from the data core. */
73 uint32_t virtio_idx; /* Index of virtio device */
74 uint32_t dom_id; /* Domain id of xen guest */
75 } ___rte_cache_aligned;
78 * Device linked list structure for configuration.
80 struct virtio_net_config_ll
82 struct virtio_net dev; /* Virtio device. */
83 struct virtio_net_config_ll *next; /* Next entry on linked list. */
87 * Information relating to memory regions including offsets to addresses in QEMUs memory file.
89 struct virtio_memory_regions {
90 uint64_t guest_phys_address; /* Base guest physical address of region. */
91 uint64_t guest_phys_address_end; /* End guest physical address of region. */
92 uint64_t memory_size; /* Size of region. */
93 uint64_t userspace_address; /* Base userspace address of region. */
94 uint64_t address_offset; /* Offset of region for address translation. */
98 * Memory structure includes region and mapping information.
100 struct virtio_memory {
101 uint32_t nregions; /* Number of memory regions. */
102 struct virtio_memory_regions regions[0]; /* Memory region information. */
106 * Device operations to add/remove device.
108 struct virtio_net_device_ops {
109 int (* new_device)(struct virtio_net *); /* Add device. */
110 void (* destroy_device) (volatile struct virtio_net *); /* Remove device. */
113 struct vhost_net_device_ops const * get_virtio_net_callbacks(void);