1/*-
| 1/*-
|
2 * This header is BSD licensed so anyone can use the definitions to implement
3 * compatible drivers/servers.
| 2 * Copyright (c) 2014, Bryan Venteicher <bryanv@FreeBSD.org>
3 * All rights reserved.
|
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
| 4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
|
9 * notice, this list of conditions and the following disclaimer.
| 9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
|
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
| 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.
|
13 * 3. Neither the name of IBM nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
| |
27 *
| 14 *
|
28 * $FreeBSD: stable/10/sys/dev/virtio/virtio.h 252708 2013-07-04 17:59:09Z bryanv $
| 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/10/sys/dev/virtio/virtio.h 267312 2014-06-10 03:23:35Z bryanv $
|
29 */
30
31#ifndef _VIRTIO_H_
32#define _VIRTIO_H_
33
| 27 */
28
29#ifndef _VIRTIO_H_
30#define _VIRTIO_H_
31
|
| 32#include <dev/virtio/virtio_ids.h>
33
|
34struct vq_alloc_info;
35
| 34struct vq_alloc_info;
35
|
36/* VirtIO device IDs. */
37#define VIRTIO_ID_NETWORK 0x01
38#define VIRTIO_ID_BLOCK 0x02
39#define VIRTIO_ID_CONSOLE 0x03
40#define VIRTIO_ID_ENTROPY 0x04
41#define VIRTIO_ID_BALLOON 0x05
42#define VIRTIO_ID_IOMEMORY 0x06
43#define VIRTIO_ID_SCSI 0x08
44#define VIRTIO_ID_9P 0x09
45
46/* Status byte for guest to report progress. */
47#define VIRTIO_CONFIG_STATUS_RESET 0x00
48#define VIRTIO_CONFIG_STATUS_ACK 0x01
49#define VIRTIO_CONFIG_STATUS_DRIVER 0x02
50#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04
51#define VIRTIO_CONFIG_STATUS_FAILED 0x80
52
| |
53/*
| 36/*
|
54 * Generate interrupt when the virtqueue ring is
55 * completely used, even if we've suppressed them.
56 */
57#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24)
58
59/*
60 * The guest should never negotiate this feature; it
61 * is used to detect faulty drivers.
62 */
63#define VIRTIO_F_BAD_FEATURE (1 << 30)
64
65/*
66 * Some VirtIO feature bits (currently bits 28 through 31) are
67 * reserved for the transport being used (eg. virtio_ring), the
68 * rest are per-device feature bits.
69 */
70#define VIRTIO_TRANSPORT_F_START 28
71#define VIRTIO_TRANSPORT_F_END 32
72
73/*
| |
74 * Each virtqueue indirect descriptor list must be physically contiguous.
75 * To allow us to malloc(9) each list individually, limit the number
76 * supported to what will fit in one page. With 4KB pages, this is a limit
77 * of 256 descriptors. If there is ever a need for more, we can switch to
78 * contigmalloc(9) for the larger allocations, similar to what
79 * bus_dmamem_alloc(9) does.
80 *
81 * Note the sizeof(struct vring_desc) is 16 bytes.
--- 99 unchanged lines hidden --- | 37 * Each virtqueue indirect descriptor list must be physically contiguous.
38 * To allow us to malloc(9) each list individually, limit the number
39 * supported to what will fit in one page. With 4KB pages, this is a limit
40 * of 256 descriptors. If there is ever a need for more, we can switch to
41 * contigmalloc(9) for the larger allocations, similar to what
42 * bus_dmamem_alloc(9) does.
43 *
44 * Note the sizeof(struct vring_desc) is 16 bytes.
--- 99 unchanged lines hidden --- |