summaryrefslogtreecommitdiff
path: root/drivers/staging/hv/hv.h
blob: 41f5ebb86e17579de40dc50d7bc35b1b72b1ce74 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
 *
 * Copyright (c) 2009, Microsoft Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 * Authors:
 *   Haiyang Zhang <haiyangz@microsoft.com>
 *   Hank Janssen  <hjanssen@microsoft.com>
 *
 */


#ifndef __HV_H__
#define __HV_H__

#include "hv_api.h"

enum {
	VMBUS_MESSAGE_CONNECTION_ID	= 1,
	VMBUS_MESSAGE_PORT_ID		= 1,
	VMBUS_EVENT_CONNECTION_ID	= 2,
	VMBUS_EVENT_PORT_ID		= 2,
	VMBUS_MONITOR_CONNECTION_ID	= 3,
	VMBUS_MONITOR_PORT_ID		= 3,
	VMBUS_MESSAGE_SINT		= 2,
};

/* #defines */

#define HV_PRESENT_BIT			0x80000000

#define HV_LINUX_GUEST_ID_LO		0x00000000
#define HV_LINUX_GUEST_ID_HI		0xB16B00B5
#define HV_LINUX_GUEST_ID		(((u64)HV_LINUX_GUEST_ID_HI << 32) | \
					   HV_LINUX_GUEST_ID_LO)

#define HV_CPU_POWER_MANAGEMENT		(1 << 0)
#define HV_RECOMMENDATIONS_MAX		4

#define HV_X64_MAX			5
#define HV_CAPS_MAX			8


#define HV_HYPERCALL_PARAM_ALIGN	sizeof(u64)


/* Service definitions */

#define HV_SERVICE_PARENT_PORT				(0)
#define HV_SERVICE_PARENT_CONNECTION			(0)

#define HV_SERVICE_CONNECT_RESPONSE_SUCCESS		(0)
#define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER	(1)
#define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE	(2)
#define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED	(3)

#define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID		(1)
#define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID		(2)
#define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID	(3)
#define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID	(4)
#define HV_SERVICE_MAX_MESSAGE_ID				(4)

#define HV_SERVICE_PROTOCOL_VERSION (0x0010)
#define HV_CONNECT_PAYLOAD_BYTE_COUNT 64

/* #define VMBUS_REVISION_NUMBER	6 */

/* Our local vmbus's port and connection id. Anything >0 is fine */
/* #define VMBUS_PORT_ID		11 */

/* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
static const struct hv_guid VMBUS_SERVICE_ID = {
	.data = {
		0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
		0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
	},
};

#define MAX_NUM_CPUS	32


struct hv_input_signal_event_buffer {
	u64 Align8;
	struct hv_input_signal_event Event;
};

struct hv_context {
	/* We only support running on top of Hyper-V
	* So at this point this really can only contain the Hyper-V ID
	*/
	u64 GuestId;

	void *HypercallPage;

	bool SynICInitialized;

	/*
	 * This is used as an input param to HvCallSignalEvent hypercall. The
	 * input param is immutable in our usage and must be dynamic mem (vs
	 * stack or global). */
	struct hv_input_signal_event_buffer *SignalEventBuffer;
	/* 8-bytes aligned of the buffer above */
	struct hv_input_signal_event *SignalEventParam;

	void *synICMessagePage[MAX_NUM_CPUS];
	void *synICEventPage[MAX_NUM_CPUS];
};

extern struct hv_context gHvContext;


/* Hv Interface */

extern int HvInit(void);

extern void HvCleanup(void);

extern u16 HvPostMessage(union hv_connection_id connectionId,
			 enum hv_message_type messageType,
			 void *payload, size_t payloadSize);

extern u16 HvSignalEvent(void);

extern void HvSynicInit(void *irqarg);

extern void HvSynicCleanup(void *arg);

#endif /* __HV_H__ */