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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/* Driver has finished configuring features */
42#define VIRTIO_CONFIG_S_FEATURES_OK 8
43/* Device entered invalid state, driver must reset it */
44#define VIRTIO_CONFIG_S_NEEDS_RESET 0x40
45/* We've given up on this device. */
46#define VIRTIO_CONFIG_S_FAILED 0x80
47
48/* Some virtio feature bits (currently bits 28 through 32) are reserved for the
49 * transport being used (eg. virtio_ring), the rest are per-device feature
50 * bits. */
51#define VIRTIO_TRANSPORT_F_START 28
52#define VIRTIO_TRANSPORT_F_END 34
53
54#ifndef VIRTIO_CONFIG_NO_LEGACY
55/* Do we get callbacks when the ring is completely used, even if we've
56 * suppressed them? */
57#define VIRTIO_F_NOTIFY_ON_EMPTY 24
58
59/* Can the device handle any descriptor layout? */
60#define VIRTIO_F_ANY_LAYOUT 27
61#endif /* VIRTIO_CONFIG_NO_LEGACY */
62
63/* v1.0 compliant. */
64#define VIRTIO_F_VERSION_1 32
65
66/*
67 * If clear - device has the IOMMU bypass quirk feature.
68 * If set - use platform tools to detect the IOMMU.
69 *
70 * Note the reverse polarity (compared to most other features),
71 * this is for compatibility with legacy systems.
72 */
73#define VIRTIO_F_IOMMU_PLATFORM 33
74#endif /* _LINUX_VIRTIO_CONFIG_H */
75

Warning: That file was not part of the compilation database. It may have many parsing errors.