2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _VIRTIO_MMIO_H
34 #define _VIRTIO_MMIO_H
36 DECLARE_CLASS(vtmmio_driver);
38 struct vtmmio_virtqueue;
43 struct resource *res[2];
45 uint64_t vtmmio_features;
46 uint32_t vtmmio_flags;
47 uint32_t vtmmio_version;
49 /* This "bus" will only ever have one child. */
50 device_t vtmmio_child_dev;
51 struct virtio_feature_desc *vtmmio_child_feat_desc;
54 struct vtmmio_virtqueue *vtmmio_vqs;
58 int vtmmio_probe(device_t);
59 int vtmmio_attach(device_t);
61 #define VIRTIO_MMIO_MAGIC_VALUE 0x000
62 #define VIRTIO_MMIO_VERSION 0x004
63 #define VIRTIO_MMIO_DEVICE_ID 0x008
64 #define VIRTIO_MMIO_VENDOR_ID 0x00c
65 #define VIRTIO_MMIO_HOST_FEATURES 0x010
66 #define VIRTIO_MMIO_HOST_FEATURES_SEL 0x014
67 #define VIRTIO_MMIO_GUEST_FEATURES 0x020
68 #define VIRTIO_MMIO_GUEST_FEATURES_SEL 0x024
69 #define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 /* version 1 only */
70 #define VIRTIO_MMIO_QUEUE_SEL 0x030
71 #define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
72 #define VIRTIO_MMIO_QUEUE_NUM 0x038
73 #define VIRTIO_MMIO_QUEUE_ALIGN 0x03c /* version 1 only */
74 #define VIRTIO_MMIO_QUEUE_PFN 0x040 /* version 1 only */
75 #define VIRTIO_MMIO_QUEUE_READY 0x044 /* requires version 2 */
76 #define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
77 #define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
78 #define VIRTIO_MMIO_INTERRUPT_ACK 0x064
79 #define VIRTIO_MMIO_STATUS 0x070
80 #define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 /* requires version 2 */
81 #define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 /* requires version 2 */
82 #define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090 /* requires version 2 */
83 #define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094 /* requires version 2 */
84 #define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0 /* requires version 2 */
85 #define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4 /* requires version 2 */
86 #define VIRTIO_MMIO_CONFIG_GENERATION 0x100 /* requires version 2 */
87 #define VIRTIO_MMIO_CONFIG 0x100
88 #define VIRTIO_MMIO_MAGIC_VIRT 0x74726976
89 #define VIRTIO_MMIO_INT_VRING (1 << 0)
90 #define VIRTIO_MMIO_INT_CONFIG (1 << 1)
91 #define VIRTIO_MMIO_VRING_ALIGN 4096
93 #endif /* _VIRTIO_MMIO_H */