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1 /*
2  *
3  * Copyright (c) 2009, Microsoft Corporation.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  * You should have received a copy of the GNU General Public License along with
15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16  * Place - Suite 330, Boston, MA 02111-1307 USA.
17  *
18  * Authors:
19  *   Haiyang Zhang <haiyangz@microsoft.com>
20  *   Hank Janssen  <hjanssen@microsoft.com>
21  *
22  */
23
24
25 #ifndef __HV_H__
26 #define __HV_H__
27
28 #include "hv_api.h"
29
30 enum {
31         VMBUS_MESSAGE_CONNECTION_ID     = 1,
32         VMBUS_MESSAGE_PORT_ID           = 1,
33         VMBUS_EVENT_CONNECTION_ID       = 2,
34         VMBUS_EVENT_PORT_ID             = 2,
35         VMBUS_MONITOR_CONNECTION_ID     = 3,
36         VMBUS_MONITOR_PORT_ID           = 3,
37         VMBUS_MESSAGE_SINT              = 2,
38 };
39
40 /* #defines */
41
42 #define HV_PRESENT_BIT                  0x80000000
43
44 #define HV_LINUX_GUEST_ID_LO            0x00000000
45 #define HV_LINUX_GUEST_ID_HI            0xB16B00B5
46 #define HV_LINUX_GUEST_ID               (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
47                                            HV_LINUX_GUEST_ID_LO)
48
49 #define HV_CPU_POWER_MANAGEMENT         (1 << 0)
50 #define HV_RECOMMENDATIONS_MAX          4
51
52 #define HV_X64_MAX                      5
53 #define HV_CAPS_MAX                     8
54
55
56 #define HV_HYPERCALL_PARAM_ALIGN        sizeof(u64)
57
58
59 /* Service definitions */
60
61 #define HV_SERVICE_PARENT_PORT                          (0)
62 #define HV_SERVICE_PARENT_CONNECTION                    (0)
63
64 #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS             (0)
65 #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER   (1)
66 #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE     (2)
67 #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
68
69 #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID           (1)
70 #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID          (2)
71 #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID        (3)
72 #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID       (4)
73 #define HV_SERVICE_MAX_MESSAGE_ID                               (4)
74
75 #define HV_SERVICE_PROTOCOL_VERSION (0x0010)
76 #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
77
78 /* #define VMBUS_REVISION_NUMBER        6 */
79
80 /* Our local vmbus's port and connection id. Anything >0 is fine */
81 /* #define VMBUS_PORT_ID                11 */
82
83 /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
84 static const struct hv_guid VMBUS_SERVICE_ID = {
85         .data = {
86                 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
87                 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
88         },
89 };
90
91 #define MAX_NUM_CPUS    32
92
93
94 struct hv_input_signal_event_buffer {
95         u64 Align8;
96         struct hv_input_signal_event Event;
97 };
98
99 struct hv_context {
100         /* We only support running on top of Hyper-V
101         * So at this point this really can only contain the Hyper-V ID
102         */
103         u64 GuestId;
104
105         void *HypercallPage;
106
107         bool SynICInitialized;
108
109         /*
110          * This is used as an input param to HvCallSignalEvent hypercall. The
111          * input param is immutable in our usage and must be dynamic mem (vs
112          * stack or global). */
113         struct hv_input_signal_event_buffer *SignalEventBuffer;
114         /* 8-bytes aligned of the buffer above */
115         struct hv_input_signal_event *SignalEventParam;
116
117         void *synICMessagePage[MAX_NUM_CPUS];
118         void *synICEventPage[MAX_NUM_CPUS];
119 };
120
121 extern struct hv_context gHvContext;
122
123
124 /* Hv Interface */
125
126 extern int HvInit(void);
127
128 extern void HvCleanup(void);
129
130 extern u16 HvPostMessage(union hv_connection_id connectionId,
131                          enum hv_message_type messageType,
132                          void *payload, size_t payloadSize);
133
134 extern u16 HvSignalEvent(void);
135
136 extern void HvSynicInit(void *irqarg);
137
138 extern void HvSynicCleanup(void *arg);
139
140 #endif /* __HV_H__ */