3 * Copyright (c) 2009, Microsoft Corporation.
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.
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
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.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
25 #ifndef _VMBUS_PRIVATE_H_
26 #define _VMBUS_PRIVATE_H_
29 #include "include/VmbusApi.h"
31 #include "ChannelMgmt.h"
32 #include "ChannelInterface.h"
33 //#include "ChannelMessages.h"
34 #include "RingBuffer.h"
36 #include "include/List.h"
42 // Maximum channels is determined by the size of the interrupt page which is PAGE_SIZE. 1/2 of PAGE_SIZE is for
43 // send endpoint interrupt and the other is receive endpoint interrupt
44 #define MAX_NUM_CHANNELS (PAGE_SIZE >> 1) << 3 // 16348 channels
46 // The value here must be in multiple of 32
47 // TODO: Need to make this configurable
48 #define MAX_NUM_CHANNELS_SUPPORTED 256
59 } VMBUS_CONNECT_STATE;
61 #define MAX_SIZE_CHANNEL_MESSAGE HV_MESSAGE_PAYLOAD_BYTE_COUNT
63 typedef struct _VMBUS_CONNECTION {
65 VMBUS_CONNECT_STATE ConnectState;
69 // Represents channel interrupts. Each bit position
70 // represents a channel.
71 // When a channel sends an interrupt via VMBUS, it
72 // finds its bit in the sendInterruptPage, set it and
73 // calls Hv to generate a port event. The other end
74 // receives the port event and parse the recvInterruptPage
75 // to see which bit is set
77 void * SendInterruptPage;
78 void * RecvInterruptPage;
80 // 2 pages - 1st page for parent->child notification and 2nd is child->parent notification
82 LIST_ENTRY ChannelMsgList;
83 HANDLE ChannelMsgLock;
86 LIST_ENTRY ChannelList;
93 typedef struct _VMBUS_MSGINFO {
95 LIST_ENTRY MsgListEntry;
97 // Synchronize the request/response if needed
100 // The message itself
101 unsigned char Msg[0];
108 extern VMBUS_CONNECTION gVmbusConnection;
111 // General vmbus interface
113 static DEVICE_OBJECT*
114 VmbusChildDeviceCreate(
121 DEVICE_OBJECT* Device);
124 VmbusChildDeviceRemove(
125 DEVICE_OBJECT* Device);
128 //VmbusChildDeviceDestroy(
131 static VMBUS_CHANNEL*
137 // Connection interface
166 #endif // _VMBUS_PRIVATE_H_