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 ivmbus_open(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->channel, sendbuffer_size,
  35                                 recv_ringbuffer_size, userdata, userdatalen,
  36                                 channel_callback, context);
  37 }
  38
  39 static void ivmbus_close(struct hv_device *device)
  40 {
  41         vmbus_close(device->channel);
  42 }
  43
  44 static int ivmbus_sendpacket(struct hv_device *device, const void *buffer,
  45                                    u32 bufferlen, u64 requestid, u32 type,
  46                                    u32 flags)
  47 {
  48         return vmbus_sendpacket(device->channel, buffer, bufferlen,
  49                                       requestid, type, flags);
  50 }
  51
  52 static int ivmbus_sendpacket_pagebuffer(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->channel, pagebuffers,
  58                                                 pagecount, buffer, bufferlen,
  59                                                 requestid);
  60 }
  61
  62 /* vmbus interface function pointer table */
  63 const struct vmbus_channel_interface vmbus_ops = {
  64         .Open = ivmbus_open,
  65         .Close = ivmbus_close,
  66         .SendPacket = ivmbus_sendpacket,
  67         .SendPacketPageBuffer = ivmbus_sendpacket_pagebuffer,
  68 };