Pileus Git - ~andy/linux/blob - drivers/staging/hv/Channel.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 _CHANNEL_H_
  26 #define _CHANNEL_H_
  27
  28 #include "include/osd.h"
  29 #include "ChannelMgmt.h"
  30
  31 /* The format must be the same as VMDATA_GPA_DIRECT */
  32 struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
  33         u16 Type;
  34         u16 DataOffset8;
  35         u16 Length8;
  36         u16 Flags;
  37         u64 TransactionId;
  38         u32 Reserved;
  39         u32 RangeCount;
  40         PAGE_BUFFER Range[MAX_PAGE_BUFFER_COUNT];
  41 } __attribute__((packed));
  42
  43 /* The format must be the same as VMDATA_GPA_DIRECT */
  44 struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
  45         u16 Type;
  46         u16 DataOffset8;
  47         u16 Length8;
  48         u16 Flags;
  49         u64 TransactionId;
  50         u32 Reserved;
  51         u32 RangeCount;         /* Always 1 in this case */
  52         MULTIPAGE_BUFFER Range;
  53 } __attribute__((packed));
  54
  55
  56 extern int VmbusChannelOpen(VMBUS_CHANNEL *Channel,
  57                             u32 SendRingBufferSize,
  58                             u32 RecvRingBufferSize,
  59                             void *UserData,
  60                             u32 UserDataLen,
  61                             PFN_CHANNEL_CALLBACK pfnOnChannelCallback,
  62                             void *Context);
  63
  64 extern void VmbusChannelClose(VMBUS_CHANNEL *Channel);
  65
  66 extern int VmbusChannelSendPacket(VMBUS_CHANNEL *Channel,
  67                                   const void *Buffer,
  68                                   u32 BufferLen,
  69                                   u64 RequestId,
  70                                   VMBUS_PACKET_TYPE Type,
  71                                   u32 Flags);
  72
  73 extern int VmbusChannelSendPacketPageBuffer(VMBUS_CHANNEL *Channel,
  74                                             PAGE_BUFFER PageBuffers[],
  75                                             u32 PageCount,
  76                                             void *Buffer,
  77                                             u32 BufferLen,
  78                                             u64 RequestId);
  79
  80 extern int VmbusChannelSendPacketMultiPageBuffer(VMBUS_CHANNEL *Channel,
  81                                         MULTIPAGE_BUFFER *MultiPageBuffer,
  82                                         void *Buffer,
  83                                         u32 BufferLen,
  84                                         u64 RequestId);
  85
  86 extern int VmbusChannelEstablishGpadl(VMBUS_CHANNEL *Channel,
  87                                       void *Kbuffer,
  88                                       u32 Size,
  89                                       u32 *GpadlHandle);
  90
  91 extern int VmbusChannelTeardownGpadl(VMBUS_CHANNEL *Channel,
  92                                      u32 GpadlHandle);
  93
  94 extern int VmbusChannelRecvPacket(VMBUS_CHANNEL *Channel,
  95                                   void *Buffer,
  96                                   u32 BufferLen,
  97                                   u32 *BufferActualLen,
  98                                   u64 *RequestId);
  99
 100 extern int VmbusChannelRecvPacketRaw(VMBUS_CHANNEL *Channel,
 101                                      void *Buffer,
 102                                      u32 BufferLen,
 103                                      u32 *BufferActualLen,
 104                                      u64 *RequestId);
 105
 106 extern void VmbusChannelOnChannelEvent(VMBUS_CHANNEL *Channel);
 107
 108 extern void VmbusChannelGetDebugInfo(VMBUS_CHANNEL *Channel,
 109                                      VMBUS_CHANNEL_DEBUG_INFO *DebugInfo);
 110
 111 extern void VmbusChannelOnTimer(unsigned long data);
 112
 113 #endif /* _CHANNEL_H_ */