vhost_virtqueue Struct Reference

#include <rte_virtio_net.h>

Data Fields
struct vring_desc *	desc
struct vring_avail *	avail
struct vring_used *	used
uint32_t	size
uint32_t	backend
uint16_t	vhost_hlen
volatile uint16_t	last_used_idx
volatile uint16_t	last_used_idx_res
int	callfd
int	kickfd
uint64_t	reserved [16]
struct buf_vector	buf_vec [BUF_VECTOR_MAX]

Detailed Description

Structure contains variables relevant to RX/TX virtqueues.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 81 of file rte_virtio_net.h.

Field Documentation

struct vring_desc* desc

Virtqueue descriptor ring.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 82 of file rte_virtio_net.h.

struct vring_avail* avail

Virtqueue available ring.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 83 of file rte_virtio_net.h.

struct vring_used* used

Virtqueue used ring.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 84 of file rte_virtio_net.h.

uint32_t size

Size of descriptor ring.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 85 of file rte_virtio_net.h.

uint32_t backend

Backend value to determine if device should started/stopped.

Definition at line 86 of file rte_virtio_net.h.

uint16_t vhost_hlen

Vhost header length (varies depending on RX merge buffers.

Examples:

vhost/main.c, vhost_xen/main.c, and vhost_xen/vhost_monitor.c.

Definition at line 87 of file rte_virtio_net.h.

volatile uint16_t last_used_idx

Last index used on the available ring

Examples:

vhost/main.c, and vhost_xen/main.c.

Definition at line 88 of file rte_virtio_net.h.

volatile uint16_t last_used_idx_res

Used for multiple devices reserving buffers.

Examples:

vhost/main.c, and vhost_xen/main.c.

Definition at line 89 of file rte_virtio_net.h.

int callfd

Used to notify the guest (trigger interrupt).

Examples:

vhost/main.c.

Definition at line 90 of file rte_virtio_net.h.

int kickfd

Currently unused as polling mode is enabled.

Definition at line 91 of file rte_virtio_net.h.

uint64_t reserved[16]

Reserve some spaces for future extension.

Definition at line 93 of file rte_virtio_net.h.

struct buf_vector buf_vec[BUF_VECTOR_MAX]

for scatter RX.

Definition at line 94 of file rte_virtio_net.h.

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The documentation for this struct was generated from the following file:

• lib/librte_vhost/rte_virtio_net.h