ReactOS 0.4.15-dev-8241-g63935f8
virtio_ring.h
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1#ifndef _UAPI_LINUX_VIRTIO_RING_H
2#define _UAPI_LINUX_VIRTIO_RING_H
3/* An interface for efficient virtio implementation, currently for use by KVM
4* and lguest, but hopefully others soon. Do NOT change this since it will
5* break existing servers and clients.
6*
7* This header is BSD licensed so anyone can use the definitions to implement
8* compatible drivers/servers.
9*
10* Redistribution and use in source and binary forms, with or without
11* modification, are permitted provided that the following conditions
12* are met:
13* 1. Redistributions of source code must retain the above copyright
14* notice, this list of conditions and the following disclaimer.
15* 2. Redistributions in binary form must reproduce the above copyright
16* notice, this list of conditions and the following disclaimer in the
17* documentation and/or other materials provided with the distribution.
18* 3. Neither the name of IBM nor the names of its contributors
19* may be used to endorse or promote products derived from this software
20* without specific prior written permission.
21* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
22* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
25* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31* SUCH DAMAGE.
32*
33* Copyright Rusty Russell IBM Corporation 2007. */
34
35#include "linux/types.h"
36#include "linux/virtio_types.h"
37
38/* We support indirect buffer descriptors */
39#define VIRTIO_RING_F_INDIRECT_DESC 28
40
41/* The Guest publishes the used index for which it expects an interrupt
42* at the end of the avail ring. Host should ignore the avail->flags field. */
43/* The Host publishes the avail index for which it expects a kick
44* at the end of the used ring. Guest should ignore the used->flags field. */
45#define VIRTIO_RING_F_EVENT_IDX 29
46
47void vring_transport_features(VirtIODevice *vdev, u64 *features);
48unsigned long vring_size(unsigned int num, unsigned long align, bool packed);
49
50#endif /* _UAPI_LINUX_VIRTIO_RING_H */
ULONG64 u64
Definition: btrfs.h:15
int align(int length, int align)
Definition: dsound8.c:36
GLuint GLuint num
Definition: glext.h:9618
GLuint GLenum GLsizei GLsizei GLint GLint GLboolean packed
Definition: glext.h:9271
unsigned long vring_size(unsigned int num, unsigned long align, bool packed)
Definition: VirtIORing.c:555
void vring_transport_features(VirtIODevice *vdev, u64 *features)
Definition: VirtIORing.c:534