vmbus_reg.h revision 302170 
1/*-
2 * Copyright (c) 2016 Microsoft Corp.
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
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
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.
14 *
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/hyperv/vmbus/vmbus_reg.h 302170 2016-06-24 02:30:14Z sephe $
27 */
28
29#ifndef _VMBUS_REG_H_
30#define _VMBUS_REG_H_
31
32#include <sys/param.h>
33
34/*
35 * Hyper-V SynIC message format.
36 */
37
38#define VMBUS_MSG_DSIZE_MAX		240
39#define VMBUS_MSG_SIZE			256
40
41struct vmbus_message {
42	uint32_t	msg_type;	/* VMBUS_MSGTYPE_ */
43	uint8_t		msg_dsize;	/* data size */
44	uint8_t		msg_flags;	/* VMBUS_MSGFLAG_ */
45	uint16_t	msg_rsvd;
46	uint64_t	msg_id;
47	uint8_t		msg_data[VMBUS_MSG_DSIZE_MAX];
48} __packed;
49CTASSERT(sizeof(struct vmbus_message) == VMBUS_MSG_SIZE);
50
51#define VMBUS_MSGTYPE_NONE		0
52#define VMBUS_MSGTYPE_CHANNEL		1
53#define VMBUS_MSGTYPE_TIMER_EXPIRED	0x80000010
54
55#define VMBUS_MSGFLAG_PENDING		0x01
56
57/*
58 * Hyper-V SynIC event flags
59 */
60
61#ifdef __LP64__
62#define VMBUS_EVTFLAGS_MAX	32
63#define VMBUS_EVTFLAG_SHIFT	6
64#else
65#define VMBUS_EVTFLAGS_MAX	64
66#define VMBUS_EVTFLAG_SHIFT	5
67#endif
68#define VMBUS_EVTFLAG_LEN	(1 << VMBUS_EVTFLAG_SHIFT)
69#define VMBUS_EVTFLAG_MASK	(VMBUS_EVTFLAG_LEN - 1)
70#define VMBUS_EVTFLAGS_SIZE	256
71
72struct vmbus_evtflags {
73	u_long		evt_flags[VMBUS_EVTFLAGS_MAX];
74} __packed;
75CTASSERT(sizeof(struct vmbus_evtflags) == VMBUS_EVTFLAGS_SIZE);
76
77/*
78 * Channel
79 */
80
81#define VMBUS_CHAN_MAX_COMPAT	256
82#define VMBUS_CHAN_MAX		(VMBUS_EVTFLAG_LEN * VMBUS_EVTFLAGS_MAX)
83
84#endif	/* !_VMBUS_REG_H_ */
85