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9fbe302b MT |
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 "standard-headers/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 | |
ff804f15 CH |
43 | /* Device entered invalid state, driver must reset it */ |
44 | #define VIRTIO_CONFIG_S_NEEDS_RESET 0x40 | |
9fbe302b MT |
45 | /* We've given up on this device. */ |
46 | #define VIRTIO_CONFIG_S_FAILED 0x80 | |
47 | ||
d36f7de8 CH |
48 | /* |
49 | * Virtio feature bits VIRTIO_TRANSPORT_F_START through | |
50 | * VIRTIO_TRANSPORT_F_END are reserved for the transport | |
51 | * being used (e.g. virtio_ring, virtio_pci etc.), the | |
52 | * rest are per-device feature bits. | |
53 | */ | |
9fbe302b | 54 | #define VIRTIO_TRANSPORT_F_START 28 |
d36f7de8 | 55 | #define VIRTIO_TRANSPORT_F_END 38 |
9fbe302b MT |
56 | |
57 | #ifndef VIRTIO_CONFIG_NO_LEGACY | |
58 | /* Do we get callbacks when the ring is completely used, even if we've | |
59 | * suppressed them? */ | |
60 | #define VIRTIO_F_NOTIFY_ON_EMPTY 24 | |
61 | ||
62 | /* Can the device handle any descriptor layout? */ | |
63 | #define VIRTIO_F_ANY_LAYOUT 27 | |
64 | #endif /* VIRTIO_CONFIG_NO_LEGACY */ | |
65 | ||
66 | /* v1.0 compliant. */ | |
67 | #define VIRTIO_F_VERSION_1 32 | |
68 | ||
dbdfea92 | 69 | /* |
e6546342 JW |
70 | * If clear - device has the platform DMA (e.g. IOMMU) bypass quirk feature. |
71 | * If set - use platform DMA tools to access the memory. | |
dbdfea92 CH |
72 | * |
73 | * Note the reverse polarity (compared to most other features), | |
74 | * this is for compatibility with legacy systems. | |
75 | */ | |
e6546342 JW |
76 | #define VIRTIO_F_ACCESS_PLATFORM 33 |
77 | /* Legacy name for VIRTIO_F_ACCESS_PLATFORM (for compatibility with old userspace) */ | |
78 | #define VIRTIO_F_IOMMU_PLATFORM VIRTIO_F_ACCESS_PLATFORM | |
d36f7de8 | 79 | |
da054c64 PB |
80 | /* This feature indicates support for the packed virtqueue layout. */ |
81 | #define VIRTIO_F_RING_PACKED 34 | |
82 | ||
d9cb4336 CH |
83 | /* |
84 | * This feature indicates that memory accesses by the driver and the | |
85 | * device are ordered in a way described by the platform. | |
86 | */ | |
87 | #define VIRTIO_F_ORDER_PLATFORM 36 | |
88 | ||
d36f7de8 CH |
89 | /* |
90 | * Does the device support Single Root I/O Virtualization? | |
91 | */ | |
92 | #define VIRTIO_F_SR_IOV 37 | |
9fbe302b | 93 | #endif /* _LINUX_VIRTIO_CONFIG_H */ |