virtio_ring.h File Reference

#include "linux/types.h"
#include "linux/virtio_types.h"

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Macros
#define	VIRTIO_RING_F_INDIRECT_DESC   28
#define	VIRTIO_RING_F_EVENT_IDX   29

Functions
void	vring_transport_features (VirtIODevice *vdev, u64 *features)
unsigned long	vring_size (unsigned int num, unsigned long align, bool packed)

Macro Definition Documentation

VIRTIO_RING_F_EVENT_IDX

#define VIRTIO_RING_F_EVENT_IDX   29

Definition at line 45 of file virtio_ring.h.

VIRTIO_RING_F_INDIRECT_DESC

#define VIRTIO_RING_F_INDIRECT_DESC   28

Definition at line 39 of file virtio_ring.h.

Function Documentation

vring_size()

unsigned long vring_size	(	unsigned int	num,
		unsigned long	align,
		bool	packed
	)

Definition at line 555 of file VirtIORing.c.

{
    if (packed) {
        return vring_size_packed(num, align);
    } else {
        return vring_size_split(num, align);
    }
}

Referenced by vio_legacy_query_vq_alloc(), vio_legacy_setup_vq(), and vring_pci_size().

vring_transport_features()

void vring_transport_features	(	VirtIODevice *	vdev,
		u64 *	features
	)

Definition at line 534 of file VirtIORing.c.

{
    unsigned int i;
 
    for (i = VIRTIO_TRANSPORT_F_START; i < VIRTIO_TRANSPORT_F_END; i++) {
        if (i != VIRTIO_RING_F_INDIRECT_DESC &&
            i != VIRTIO_RING_F_EVENT_IDX &&
            i != VIRTIO_F_VERSION_1) {
            virtio_feature_disable(*features, i);
        }
    }
}

Referenced by vio_legacy_set_features(), and vio_modern_set_features().