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gerrit-public.fairphone.software / kernel / msm-4.9 / fe5cbc6e06c7d8b3a86f6f5491d74766bb5c2827 / . / include / linux / virtio_mmio.h
blob: c4b09689ab644719d1aa28fdb9510dfe9c5a8b5b [file] [log] [blame]
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]1/*
2 * Virtio platform device driver
3 *
4 * Copyright 2011, ARM Ltd.
5 *
6 * Based on Virtio PCI driver by Anthony Liguori, copyright IBM Corp. 2007
7 *
8 * This header is BSD licensed so anyone can use the definitions to implement
9 * compatible drivers/servers.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of IBM nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef _LINUX_VIRTIO_MMIO_H
36#define _LINUX_VIRTIO_MMIO_H
37
38/*
39 * Control registers
40 */
41
42/* Magic value ("virt" string) - Read Only */
43#define VIRTIO_MMIO_MAGIC_VALUE 0x000
44
45/* Virtio device version - Read Only */
46#define VIRTIO_MMIO_VERSION 0x004
47
48/* Virtio device ID - Read Only */
49#define VIRTIO_MMIO_DEVICE_ID 0x008
50
51/* Virtio vendor ID - Read Only */
52#define VIRTIO_MMIO_VENDOR_ID 0x00c
53
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]54/* Bitmask of the features supported by the device (host)
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]55 * (32 bits per set) - Read Only */
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]56#define VIRTIO_MMIO_DEVICE_FEATURES 0x010
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]57
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]58/* Device (host) features set selector - Write Only */
59#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]60
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]61/* Bitmask of features activated by the driver (guest)
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]62 * (32 bits per set) - Write Only */
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]63#define VIRTIO_MMIO_DRIVER_FEATURES 0x020
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]64
65/* Activated features set selector - Write Only */
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]66#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024
67
68
69#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]70
71/* Guest's memory page size in bytes - Write Only */
72#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028
73
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]74#endif
75
76
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]77/* Queue selector - Write Only */
78#define VIRTIO_MMIO_QUEUE_SEL 0x030
79
80/* Maximum size of the currently selected queue - Read Only */
81#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
82
83/* Queue size for the currently selected queue - Write Only */
84#define VIRTIO_MMIO_QUEUE_NUM 0x038
85
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]86
87#ifndef VIRTIO_MMIO_NO_LEGACY /* LEGACY DEVICES ONLY! */
88
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]89/* Used Ring alignment for the currently selected queue - Write Only */
90#define VIRTIO_MMIO_QUEUE_ALIGN 0x03c
91
92/* Guest's PFN for the currently selected queue - Read Write */
93#define VIRTIO_MMIO_QUEUE_PFN 0x040
94
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]95#endif
96
97
98/* Ready bit for the currently selected queue - Read Write */
99#define VIRTIO_MMIO_QUEUE_READY 0x044
100
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]101/* Queue notifier - Write Only */
102#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
103
104/* Interrupt status - Read Only */
105#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
106
107/* Interrupt acknowledge - Write Only */
108#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
109
110/* Device status register - Read Write */
111#define VIRTIO_MMIO_STATUS 0x070
112
Pawel Moll1862ee22015-01-23 14:45:55 +1030[diff] [blame]113/* Selected queue's Descriptor Table address, 64 bits in two halves */
114#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080
115#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084
116
117/* Selected queue's Available Ring address, 64 bits in two halves */
118#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090
119#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094
120
121/* Selected queue's Used Ring address, 64 bits in two halves */
122#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0
123#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4
124
125/* Configuration atomicity value */
126#define VIRTIO_MMIO_CONFIG_GENERATION 0x0fc
127
Pawel Molledfd52e2011-10-24 14:07:03 +0100[diff] [blame]128/* The config space is defined by each driver as
129 * the per-driver configuration space - Read Write */
130#define VIRTIO_MMIO_CONFIG 0x100
131
132
133
134/*
135 * Interrupt flags (re: interrupt status & acknowledge registers)
136 */
137
138#define VIRTIO_MMIO_INT_VRING (1 << 0)
139#define VIRTIO_MMIO_INT_CONFIG (1 << 1)
140
141#endif