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 sendbuffer_size,
  29                              u32 recv_ringbuffer_size, void *userdata,
  30                              u32 userdatalen,
  31                              void (*channel_callback)(void *context),
  32                              void *context)
  33 {
  34         return vmbus_open(device->context, sendbuffer_size,
  35                                 recv_ringbuffer_size, userdata, userdatalen,
  36                                 channel_callback, 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 *multi_pagebuffer,
  64                                 void *buffer, u32 bufferlen, u64 requestid)
  65 {
  66         return vmbus_sendpacket_multipagebuffer(device->context,
  67                                                      multi_pagebuffer, buffer,
  68                                                      bufferlen, requestid);
  69 }
  70
  71 static int IVmbusChannelRecvPacket(struct hv_device *device, void *buffer,
  72                                    u32 bufferlen, u32 *buffer_actuallen,
  73                                    u64 *requestid)
  74 {
  75         return vmbus_recvpacket(device->context, buffer, bufferlen,
  76                                       buffer_actuallen, requestid);
  77 }
  78
  79 static int IVmbusChannelRecvPacketRaw(struct hv_device *device, void *buffer,
  80                                       u32 bufferlen, u32 *buffer_actuallen,
  81                                       u64 *requestid)
  82 {
  83         return vmbus_recvpacket_raw(device->context, buffer, bufferlen,
  84                                          buffer_actuallen, requestid);
  85 }
  86
  87 static int IVmbusChannelEstablishGpadl(struct hv_device *device, void *buffer,
  88                                        u32 bufferlen, u32 *gpadl_handle)
  89 {
  90         return vmbus_establish_gpadl(device->context, buffer, bufferlen,
  91                                           gpadl_handle);
  92 }
  93
  94 static int IVmbusChannelTeardownGpadl(struct hv_device *device,
  95                                       u32 gpadl_handle)
  96 {
  97         return vmbus_teardown_gpadl(device->context, gpadl_handle);
  98
  99 }
 100
 101
 102 void GetChannelInfo(struct hv_device *device, struct hv_device_info *info)
 103 {
 104         struct vmbus_channel_debug_info debug_info;
 105
 106         if (!device->context)
 107                 return;
 108
 109         vmbus_get_debug_info(device->context, &debug_info);
 110
 111         info->ChannelId = debug_info.RelId;
 112         info->ChannelState = debug_info.State;
 113         memcpy(&info->ChannelType, &debug_info.InterfaceType,
 114                sizeof(struct hv_guid));
 115         memcpy(&info->ChannelInstance, &debug_info.InterfaceInstance,
 116                sizeof(struct hv_guid));
 117
 118         info->MonitorId = debug_info.MonitorId;
 119
 120         info->ServerMonitorPending = debug_info.ServerMonitorPending;
 121         info->ServerMonitorLatency = debug_info.ServerMonitorLatency;
 122         info->ServerMonitorConnectionId = debug_info.ServerMonitorConnectionId;
 123
 124         info->ClientMonitorPending = debug_info.ClientMonitorPending;
 125         info->ClientMonitorLatency = debug_info.ClientMonitorLatency;
 126         info->ClientMonitorConnectionId = debug_info.ClientMonitorConnectionId;
 127
 128         info->Inbound.InterruptMask = debug_info.Inbound.CurrentInterruptMask;
 129         info->Inbound.ReadIndex = debug_info.Inbound.CurrentReadIndex;
 130         info->Inbound.WriteIndex = debug_info.Inbound.CurrentWriteIndex;
 131         info->Inbound.BytesAvailToRead = debug_info.Inbound.BytesAvailToRead;
 132         info->Inbound.BytesAvailToWrite = debug_info.Inbound.BytesAvailToWrite;
 133
 134         info->Outbound.InterruptMask = debug_info.Outbound.CurrentInterruptMask;
 135         info->Outbound.ReadIndex = debug_info.Outbound.CurrentReadIndex;
 136         info->Outbound.WriteIndex = debug_info.Outbound.CurrentWriteIndex;
 137         info->Outbound.BytesAvailToRead = debug_info.Outbound.BytesAvailToRead;
 138         info->Outbound.BytesAvailToWrite =
 139                 debug_info.Outbound.BytesAvailToWrite;
 140 }
 141
 142
 143 /* vmbus interface function pointer table */
 144 const struct vmbus_channel_interface vmbus_ops = {
 145         .Open = IVmbusChannelOpen,
 146         .Close = IVmbusChannelClose,
 147         .SendPacket = IVmbusChannelSendPacket,
 148         .SendPacketPageBuffer = IVmbusChannelSendPacketPageBuffer,
 149         .SendPacketMultiPageBuffer = IVmbusChannelSendPacketMultiPageBuffer,
 150         .RecvPacket = IVmbusChannelRecvPacket,
 151         .RecvPacketRaw  = IVmbusChannelRecvPacketRaw,
 152         .EstablishGpadl = IVmbusChannelEstablishGpadl,
 153         .TeardownGpadl = IVmbusChannelTeardownGpadl,
 154         .GetInfo = GetChannelInfo,
 155 };