2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
21 #ifndef __DEVICES_LNX_VIRTIO_PCI_H__
22 #define __DEVICES_LNX_VIRTIO_PCI_H__
27 /* PCI Vendor IDs (from Qemu) */
28 #define VIRTIO_VENDOR_ID 0x1af4 // Redhat/Qumranet
29 #define VIRTIO_SUBVENDOR_ID 0x1af4 // Redhat/Qumranet
30 #define VIRTIO_SUBDEVICE_ID 0x1100 // Qemu
33 #define VIRTIO_NET_DEV_ID 0x1000
34 #define VIRTIO_BLOCK_DEV_ID 0x1001
35 #define VIRTIO_BALLOON_DEV_ID 0x1002
36 #define VIRTIO_CONSOLE_DEV_ID 0x1003
38 #define VIRTIO_BLOCK_SUBDEVICE_ID 2
42 #define HOST_FEATURES_PORT 0
43 #define GUEST_FEATURES_PORT 4
44 #define VRING_PG_NUM_PORT 8
45 #define VRING_SIZE_PORT 12
46 #define VRING_Q_SEL_PORT 14
47 #define VRING_Q_NOTIFY_PORT 16
48 #define VIRTIO_STATUS_PORT 18
49 #define VIRTIO_ISR_PORT 19
53 /* The virtio configuration space is a hybrid io/memory mapped model
54 * All IO is done via IO port accesses
55 * The IO ports access fields in a virtio data structure, and the base io port
56 * coincides with the base address of the in memory structure
57 * There is a standard virtio structure of 20 bytes, followed by a
58 * device specific structure of n bytes.
61 struct virtio_config {
62 uint32_t host_features;
63 uint32_t guest_features;
64 uint32_t vring_page_num;
65 uint16_t vring_ring_size;
66 uint16_t vring_queue_selector;
67 uint16_t vring_queue_notifier;
70 } __attribute__((packed));
78 } __attribute__((packed));
84 } __attribute__((packed));
87 struct vring_used_elem {
90 } __attribute__((packed));
95 struct vring_used_elem ring[0];
96 } __attribute__((packed));