drivers/staging/hv/Hv.h

   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_XENLINUX_GUEST_ID_LO         0x00000000
  45 #define HV_XENLINUX_GUEST_ID_HI         0x0B00B135
  46 #define HV_XENLINUX_GUEST_ID            (((u64)HV_XENLINUX_GUEST_ID_HI << 32) \
  47                                           | HV_XENLINUX_GUEST_ID_LO)
  48
  49 #define HV_LINUX_GUEST_ID_LO            0x00000000
  50 #define HV_LINUX_GUEST_ID_HI            0xB16B00B5
  51 #define HV_LINUX_GUEST_ID               (((u64)HV_LINUX_GUEST_ID_HI << 32) | \
  52                                            HV_LINUX_GUEST_ID_LO)
  53
  54 #define HV_CPU_POWER_MANAGEMENT         (1 << 0)
  55 #define HV_RECOMMENDATIONS_MAX          4
  56
  57 #define HV_X64_MAX                      5
  58 #define HV_CAPS_MAX                     8
  59
  60
  61 #define HV_HYPERCALL_PARAM_ALIGN        sizeof(u64)
  62
  63
  64 /* Service definitions */
  65
  66 #define HV_SERVICE_PARENT_PORT                          (0)
  67 #define HV_SERVICE_PARENT_CONNECTION                    (0)
  68
  69 #define HV_SERVICE_CONNECT_RESPONSE_SUCCESS             (0)
  70 #define HV_SERVICE_CONNECT_RESPONSE_INVALID_PARAMETER   (1)
  71 #define HV_SERVICE_CONNECT_RESPONSE_UNKNOWN_SERVICE     (2)
  72 #define HV_SERVICE_CONNECT_RESPONSE_CONNECTION_REJECTED (3)
  73
  74 #define HV_SERVICE_CONNECT_REQUEST_MESSAGE_ID           (1)
  75 #define HV_SERVICE_CONNECT_RESPONSE_MESSAGE_ID          (2)
  76 #define HV_SERVICE_DISCONNECT_REQUEST_MESSAGE_ID        (3)
  77 #define HV_SERVICE_DISCONNECT_RESPONSE_MESSAGE_ID       (4)
  78 #define HV_SERVICE_MAX_MESSAGE_ID                               (4)
  79
  80 #define HV_SERVICE_PROTOCOL_VERSION (0x0010)
  81 #define HV_CONNECT_PAYLOAD_BYTE_COUNT 64
  82
  83 /* #define VMBUS_REVISION_NUMBER        6 */
  84
  85 /* Our local vmbus's port and connection id. Anything >0 is fine */
  86 /* #define VMBUS_PORT_ID                11 */
  87
  88 /* 628180B8-308D-4c5e-B7DB-1BEB62E62EF4 */
  89 static const struct hv_guid VMBUS_SERVICE_ID = {
  90         .data = {
  91                 0xb8, 0x80, 0x81, 0x62, 0x8d, 0x30, 0x5e, 0x4c,
  92                 0xb7, 0xdb, 0x1b, 0xeb, 0x62, 0xe6, 0x2e, 0xf4
  93         },
  94 };
  95
  96 #define MAX_NUM_CPUS    1
  97
  98
  99 struct hv_input_signal_event_buffer {
 100         u64 Align8;
 101         struct hv_input_signal_event Event;
 102 };
 103
 104 struct hv_context {
 105         /* XenLinux or native Linux. If XenLinux, the hypercall and synic pages
 106          * has already been initialized */
 107         u64 GuestId;
 108
 109         void *HypercallPage;
 110
 111         bool SynICInitialized;
 112
 113         /*
 114          * This is used as an input param to HvCallSignalEvent hypercall. The
 115          * input param is immutable in our usage and must be dynamic mem (vs
 116          * stack or global). */
 117         struct hv_input_signal_event_buffer *SignalEventBuffer;
 118         /* 8-bytes aligned of the buffer above */
 119         struct hv_input_signal_event *SignalEventParam;
 120
 121         void *synICMessagePage[MAX_NUM_CPUS];
 122         void *synICEventPage[MAX_NUM_CPUS];
 123 };
 124
 125 extern struct hv_context gHvContext;
 126
 127
 128 /* Hv Interface */
 129
 130 extern int HvInit(void);
 131
 132 extern void HvCleanup(void);
 133
 134 extern u16 HvPostMessage(union hv_connection_id connectionId,
 135                          enum hv_message_type messageType,
 136                          void *payload, size_t payloadSize);
 137
 138 extern u16 HvSignalEvent(void);
 139
 140 extern int HvSynicInit(u32 irqVector);
 141
 142 extern void HvSynicCleanup(void);
 143
 144 #endif /* __HV_H__ */