root / linux-headers / linux / virtio_config.h @ 51b24e34
History | View | Annotate | Download (2.7 kB)
1 |
#ifndef _LINUX_VIRTIO_CONFIG_H
|
---|---|
2 |
#define _LINUX_VIRTIO_CONFIG_H
|
3 |
/* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
|
4 |
* anyone can use the definitions to implement compatible drivers/servers.
|
5 |
*
|
6 |
* Redistribution and use in source and binary forms, with or without
|
7 |
* modification, are permitted provided that the following conditions
|
8 |
* are met:
|
9 |
* 1. Redistributions of source code must retain the above copyright
|
10 |
* notice, this list of conditions and the following disclaimer.
|
11 |
* 2. Redistributions in binary form must reproduce the above copyright
|
12 |
* notice, this list of conditions and the following disclaimer in the
|
13 |
* documentation and/or other materials provided with the distribution.
|
14 |
* 3. Neither the name of IBM nor the names of its contributors
|
15 |
* may be used to endorse or promote products derived from this software
|
16 |
* without specific prior written permission.
|
17 |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
|
18 |
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
19 |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
20 |
* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
|
21 |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
22 |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
23 |
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
24 |
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
25 |
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
26 |
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
27 |
* SUCH DAMAGE. */
|
28 |
|
29 |
/* Virtio devices use a standardized configuration space to define their
|
30 |
* features and pass configuration information, but each implementation can
|
31 |
* store and access that space differently. */
|
32 |
#include <linux/types.h> |
33 |
|
34 |
/* Status byte for guest to report progress, and synchronize features. */
|
35 |
/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
|
36 |
#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |
37 |
/* We have found a driver for the device. */
|
38 |
#define VIRTIO_CONFIG_S_DRIVER 2 |
39 |
/* Driver has used its parts of the config, and is happy */
|
40 |
#define VIRTIO_CONFIG_S_DRIVER_OK 4 |
41 |
/* We've given up on this device. */
|
42 |
#define VIRTIO_CONFIG_S_FAILED 0x80 |
43 |
|
44 |
/* Some virtio feature bits (currently bits 28 through 31) are reserved for the
|
45 |
* transport being used (eg. virtio_ring), the rest are per-device feature
|
46 |
* bits. */
|
47 |
#define VIRTIO_TRANSPORT_F_START 28 |
48 |
#define VIRTIO_TRANSPORT_F_END 32 |
49 |
|
50 |
/* Do we get callbacks when the ring is completely used, even if we've
|
51 |
* suppressed them? */
|
52 |
#define VIRTIO_F_NOTIFY_ON_EMPTY 24 |
53 |
|
54 |
#endif /* _LINUX_VIRTIO_CONFIG_H */ |