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 "channel_mgmt.h"
  29
  30 /* The format must be the same as struct vmdata_gpa_direct */
  31 struct VMBUS_CHANNEL_PACKET_PAGE_BUFFER {
  32         u16 Type;
  33         u16 DataOffset8;
  34         u16 Length8;
  35         u16 Flags;
  36         u64 TransactionId;
  37         u32 Reserved;
  38         u32 RangeCount;
  39         struct hv_page_buffer Range[MAX_PAGE_BUFFER_COUNT];
  40 } __attribute__((packed));
  41
  42 /* The format must be the same as struct vmdata_gpa_direct */
  43 struct VMBUS_CHANNEL_PACKET_MULITPAGE_BUFFER {
  44         u16 Type;
  45         u16 DataOffset8;
  46         u16 Length8;
  47         u16 Flags;
  48         u64 TransactionId;
  49         u32 Reserved;
  50         u32 RangeCount;         /* Always 1 in this case */
  51         struct hv_multipage_buffer Range;
  52 } __attribute__((packed));
  53
  54
  55 extern int VmbusChannelOpen(struct vmbus_channel *channel,
  56                             u32 SendRingBufferSize,
  57                             u32 RecvRingBufferSize,
  58                             void *UserData,
  59                             u32 UserDataLen,
  60                             void(*OnChannelCallback)(void *context),
  61                             void *Context);
  62
  63 extern void VmbusChannelClose(struct vmbus_channel *channel);
  64
  65 extern int VmbusChannelSendPacket(struct vmbus_channel *channel,
  66                                   const void *Buffer,
  67                                   u32 BufferLen,
  68                                   u64 RequestId,
  69                                   enum vmbus_packet_type Type,
  70                                   u32 Flags);
  71
  72 extern int VmbusChannelSendPacketPageBuffer(struct vmbus_channel *channel,
  73                                             struct hv_page_buffer PageBuffers[],
  74                                             u32 PageCount,
  75                                             void *Buffer,
  76                                             u32 BufferLen,
  77                                             u64 RequestId);
  78
  79 extern int VmbusChannelSendPacketMultiPageBuffer(struct vmbus_channel *channel,
  80                                         struct hv_multipage_buffer *mpb,
  81                                         void *Buffer,
  82                                         u32 BufferLen,
  83                                         u64 RequestId);
  84
  85 extern int VmbusChannelEstablishGpadl(struct vmbus_channel *channel,
  86                                       void *Kbuffer,
  87                                       u32 Size,
  88                                       u32 *GpadlHandle);
  89
  90 extern int VmbusChannelTeardownGpadl(struct vmbus_channel *channel,
  91                                      u32 GpadlHandle);
  92
  93 extern int VmbusChannelRecvPacket(struct vmbus_channel *channel,
  94                                   void *Buffer,
  95                                   u32 BufferLen,
  96                                   u32 *BufferActualLen,
  97                                   u64 *RequestId);
  98
  99 extern int VmbusChannelRecvPacketRaw(struct vmbus_channel *channel,
 100                                      void *Buffer,
 101                                      u32 BufferLen,
 102                                      u32 *BufferActualLen,
 103                                      u64 *RequestId);
 104
 105 extern void VmbusChannelOnChannelEvent(struct vmbus_channel *channel);
 106
 107 extern void VmbusChannelGetDebugInfo(struct vmbus_channel *channel,
 108                                      struct vmbus_channel_debug_info *debug);
 109
 110 extern void VmbusChannelOnTimer(unsigned long data);
 111
 112 #endif /* _CHANNEL_H_ */