1/*-
2 * Copyright IBM Corp. 2007
3 *
4 * Authors:
5 * Anthony Liguori <aliguori@us.ibm.com>
6 *
7 * This header is BSD licensed so anyone can use the definitions to implement
8 * compatible drivers/servers.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of IBM nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
| 1/*-
2 * Copyright IBM Corp. 2007
3 *
4 * Authors:
5 * Anthony Liguori <aliguori@us.ibm.com>
6 *
7 * This header is BSD licensed so anyone can use the definitions to implement
8 * compatible drivers/servers.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of IBM nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
|
33 * $FreeBSD: stable/10/sys/dev/virtio/pci/virtio_pci.h 238360 2012-07-11 02:57:19Z grehan $
| 33 * $FreeBSD: stable/10/sys/dev/virtio/pci/virtio_pci.h 268010 2014-06-29 00:37:59Z bryanv $
|
34 */
35
36#ifndef _VIRTIO_PCI_H
37#define _VIRTIO_PCI_H
38
39/* VirtIO PCI vendor/device ID. */
40#define VIRTIO_PCI_VENDORID 0x1AF4
41#define VIRTIO_PCI_DEVICEID_MIN 0x1000
42#define VIRTIO_PCI_DEVICEID_MAX 0x103F
43
44/* VirtIO ABI version, this must match exactly. */
45#define VIRTIO_PCI_ABI_VERSION 0
46
47/*
48 * VirtIO Header, located in BAR 0.
49 */
50#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
51#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
52#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
53#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
54#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
55#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
56#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
57#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
58 * also clears the register (8, RO) */
59/* Only if MSIX is enabled: */
60#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
61#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
62 (16, RW) */
63
64/* The bit of the ISR which indicates a device has an interrupt. */
65#define VIRTIO_PCI_ISR_INTR 0x1
66/* The bit of the ISR which indicates a device configuration change. */
67#define VIRTIO_PCI_ISR_CONFIG 0x2
68/* Vector value used to disable MSI for queue. */
69#define VIRTIO_MSI_NO_VECTOR 0xFFFF
70
71/*
72 * The remaining space is defined by each driver as the per-driver
73 * configuration space.
74 */
| 34 */
35
36#ifndef _VIRTIO_PCI_H
37#define _VIRTIO_PCI_H
38
39/* VirtIO PCI vendor/device ID. */
40#define VIRTIO_PCI_VENDORID 0x1AF4
41#define VIRTIO_PCI_DEVICEID_MIN 0x1000
42#define VIRTIO_PCI_DEVICEID_MAX 0x103F
43
44/* VirtIO ABI version, this must match exactly. */
45#define VIRTIO_PCI_ABI_VERSION 0
46
47/*
48 * VirtIO Header, located in BAR 0.
49 */
50#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO)*/
51#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */
52#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */
53#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */
54#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */
55#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */
56#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */
57#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading
58 * also clears the register (8, RO) */
59/* Only if MSIX is enabled: */
60#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */
61#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications
62 (16, RW) */
63
64/* The bit of the ISR which indicates a device has an interrupt. */
65#define VIRTIO_PCI_ISR_INTR 0x1
66/* The bit of the ISR which indicates a device configuration change. */
67#define VIRTIO_PCI_ISR_CONFIG 0x2
68/* Vector value used to disable MSI for queue. */
69#define VIRTIO_MSI_NO_VECTOR 0xFFFF
70
71/*
72 * The remaining space is defined by each driver as the per-driver
73 * configuration space.
74 */
|
75#define VIRTIO_PCI_CONFIG(sc) \
76 (((sc)->vtpci_flags & VTPCI_FLAG_MSIX) ? 24 : 20)
| 75#define VIRTIO_PCI_CONFIG_OFF(msix_enabled) ((msix_enabled) ? 24 : 20)
|
77
78/*
79 * How many bits to shift physical queue address written to QUEUE_PFN.
80 * 12 is historical, and due to x86 page size.
81 */
82#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
83
84/* The alignment to use between consumer and producer parts of vring. */
85#define VIRTIO_PCI_VRING_ALIGN 4096
86
87#endif /* _VIRTIO_PCI_H */
| 76
77/*
78 * How many bits to shift physical queue address written to QUEUE_PFN.
79 * 12 is historical, and due to x86 page size.
80 */
81#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
82
83/* The alignment to use between consumer and producer parts of vring. */
84#define VIRTIO_PCI_VRING_ALIGN 4096
85
86#endif /* _VIRTIO_PCI_H */
|