drivers/staging/hv/channel_interface.c

   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 #include <linux/kernel.h>
  24 #include <linux/mm.h>
  25 #include "osd.h"
  26 #include "vmbus_private.h"
  27
  28 static int IVmbusChannelOpen(struct hv_device *device, u32 SendBufferSize,
  29                              u32 RecvRingBufferSize, void *UserData,
  30                              u32 UserDataLen,
  31                              void (*ChannelCallback)(void *context),
  32                              void *Context)
  33 {
  34         return vmbus_open(device->context, SendBufferSize,
  35                                 RecvRingBufferSize, UserData, UserDataLen,
  36                                 ChannelCallback, Context);
  37 }
  38
  39 static void IVmbusChannelClose(struct hv_device *device)
  40 {
  41         vmbus_close(device->context);
  42 }
  43
  44 static int IVmbusChannelSendPacket(struct hv_device *device, const void *Buffer,
  45                                    u32 BufferLen, u64 RequestId, u32 Type,
  46                                    u32 Flags)
  47 {
  48         return vmbus_sendpacket(device->context, Buffer, BufferLen,
  49                                       RequestId, Type, Flags);
  50 }
  51
  52 static int IVmbusChannelSendPacketPageBuffer(struct hv_device *device,
  53                                 struct hv_page_buffer PageBuffers[],
  54                                 u32 PageCount, void *Buffer,
  55                                 u32 BufferLen, u64 RequestId)
  56 {
  57         return vmbus_sendpacket_pagebuffer(device->context, PageBuffers,
  58                                                 PageCount, Buffer, BufferLen,
  59                                                 RequestId);
  60 }
  61
  62 static int IVmbusChannelSendPacketMultiPageBuffer(struct hv_device *device,
  63                                 struct hv_multipage_buffer *MultiPageBuffer,
  64                                 void *Buffer, u32 BufferLen, u64 RequestId)
  65 {
  66         return vmbus_sendpacket_multipagebuffer(device->context,
  67                                                      MultiPageBuffer, Buffer,
  68                                                      BufferLen, RequestId);
  69 }
  70
  71 static int IVmbusChannelRecvPacket(struct hv_device *device, void *Buffer,
  72                                    u32 BufferLen, u32 *BufferActualLen,
  73                                    u64 *RequestId)
  74 {
  75         return vmbus_recvpacket(device->context, Buffer, BufferLen,
  76                                       BufferActualLen, RequestId);
  77 }
  78
  79 static int IVmbusChannelRecvPacketRaw(struct hv_device *device, void *Buffer,
  80                                       u32 BufferLen, u32 *BufferActualLen,
  81                                       u64 *RequestId)
  82 {
  83         return vmbus_recvpacket_raw(device->context, Buffer, BufferLen,
  84                                          BufferActualLen, RequestId);
  85 }
  86
  87 static int IVmbusChannelEstablishGpadl(struct hv_device *device, void *Buffer,
  88                                        u32 BufferLen, u32 *GpadlHandle)
  89 {
  90         return vmbus_establish_gpadl(device->context, Buffer, BufferLen,
  91                                           GpadlHandle);
  92 }
  93
  94 static int IVmbusChannelTeardownGpadl(struct hv_device *device, u32 GpadlHandle)
  95 {
  96         return vmbus_teardown_gpadl(device->context, GpadlHandle);
  97
  98 }
  99
 100
 101 void GetChannelInfo(struct hv_device *device, struct hv_device_info *info)
 102 {
 103         struct vmbus_channel_debug_info debugInfo;
 104
 105         if (!device->context)
 106                 return;
 107
 108         vmbus_get_debug_info(device->context, &debugInfo);
 109
 110         info->ChannelId = debugInfo.RelId;
 111         info->ChannelState = debugInfo.State;
 112         memcpy(&info->ChannelType, &debugInfo.InterfaceType,
 113                sizeof(struct hv_guid));
 114         memcpy(&info->ChannelInstance, &debugInfo.InterfaceInstance,
 115                sizeof(struct hv_guid));
 116
 117         info->MonitorId = debugInfo.MonitorId;
 118
 119         info->ServerMonitorPending = debugInfo.ServerMonitorPending;
 120         info->ServerMonitorLatency = debugInfo.ServerMonitorLatency;
 121         info->ServerMonitorConnectionId = debugInfo.ServerMonitorConnectionId;
 122
 123         info->ClientMonitorPending = debugInfo.ClientMonitorPending;
 124         info->ClientMonitorLatency = debugInfo.ClientMonitorLatency;
 125         info->ClientMonitorConnectionId = debugInfo.ClientMonitorConnectionId;
 126
 127         info->Inbound.InterruptMask = debugInfo.Inbound.CurrentInterruptMask;
 128         info->Inbound.ReadIndex = debugInfo.Inbound.CurrentReadIndex;
 129         info->Inbound.WriteIndex = debugInfo.Inbound.CurrentWriteIndex;
 130         info->Inbound.BytesAvailToRead = debugInfo.Inbound.BytesAvailToRead;
 131         info->Inbound.BytesAvailToWrite = debugInfo.Inbound.BytesAvailToWrite;
 132
 133         info->Outbound.InterruptMask = debugInfo.Outbound.CurrentInterruptMask;
 134         info->Outbound.ReadIndex = debugInfo.Outbound.CurrentReadIndex;
 135         info->Outbound.WriteIndex = debugInfo.Outbound.CurrentWriteIndex;
 136         info->Outbound.BytesAvailToRead = debugInfo.Outbound.BytesAvailToRead;
 137         info->Outbound.BytesAvailToWrite = debugInfo.Outbound.BytesAvailToWrite;
 138 }
 139
 140
 141 /* vmbus interface function pointer table */
 142 const struct vmbus_channel_interface vmbus_ops = {
 143         .Open = IVmbusChannelOpen,
 144         .Close = IVmbusChannelClose,
 145         .SendPacket = IVmbusChannelSendPacket,
 146         .SendPacketPageBuffer = IVmbusChannelSendPacketPageBuffer,
 147         .SendPacketMultiPageBuffer = IVmbusChannelSendPacketMultiPageBuffer,
 148         .RecvPacket = IVmbusChannelRecvPacket,
 149         .RecvPacketRaw  = IVmbusChannelRecvPacketRaw,
 150         .EstablishGpadl = IVmbusChannelEstablishGpadl,
 151         .TeardownGpadl = IVmbusChannelTeardownGpadl,
 152         .GetInfo = GetChannelInfo,
 153 };