virtio_ring.h File Reference

#include <metal/compiler.h>

Go to the source code of this file.

Data Structures
struct	vring_desc
	VirtIO ring descriptors. More...
struct	vring_avail
	Used to offer buffers to the device. More...
struct	vring_used_elem
struct	vring_used
	The device returns buffers to this structure when done with them. More...
struct	vring
	The virtqueue layout structure. More...

Macros
#define	VRING_DESC_F_NEXT   1
#define	VRING_DESC_F_WRITE   2
#define	VRING_DESC_F_INDIRECT   4
#define	VRING_USED_F_NO_NOTIFY   1
#define	VRING_AVAIL_F_NO_INTERRUPT   1
#define	vring_used_event(vr)   ((vr)->avail->ring[(vr)->num])
#define	vring_avail_event(vr)   ((vr)->used->ring[(vr)->num].event)

Functions
static int	vring_size (unsigned int num, unsigned long align)
static void	vring_init (struct vring *vr, unsigned int num, uint8_t *p, unsigned long align)
static int	vring_need_event (uint16_t event_idx, uint16_t new_idx, uint16_t old)

Variables
METAL_PACKED_BEGIN struct vring_desc	METAL_PACKED_END

Macro Definition Documentation

vring_avail_event

#define vring_avail_event

(

vr

)

((vr)->used->ring[(vr)->num].event)

VRING_AVAIL_F_NO_INTERRUPT

#define VRING_AVAIL_F_NO_INTERRUPT   1

VRING_DESC_F_INDIRECT

#define VRING_DESC_F_INDIRECT   4

VRING_DESC_F_NEXT

#define VRING_DESC_F_NEXT   1

VRING_DESC_F_WRITE

#define VRING_DESC_F_WRITE   2

vring_used_event

#define vring_used_event

(

vr

)

((vr)->avail->ring[(vr)->num])

VRING_USED_F_NO_NOTIFY

#define VRING_USED_F_NO_NOTIFY   1

Function Documentation

vring_init()

static void vring_init ( struct vring *  vr, unsigned int  num, uint8_t *  p, unsigned long  align  )

inlinestatic

vring_need_event()

static int vring_need_event ( uint16_t  event_idx, uint16_t  new_idx, uint16_t  old  )

inlinestatic

vring_size()

static int vring_size ( unsigned int  num, unsigned long  align  )

inlinestatic

Variable Documentation

METAL_PACKED_END

METAL_PACKED_BEGIN struct vring_used METAL_PACKED_END