drivers/staging/hv/vmbus_api.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 _VMBUS_API_H_
  26 #define _VMBUS_API_H_
  27
  28 #include <linux/device.h>
  29 #include <linux/workqueue.h>
  30
  31 #define MAX_PAGE_BUFFER_COUNT                           16
  32 #define MAX_MULTIPAGE_BUFFER_COUNT                      32 /* 128K */
  33
  34 #pragma pack(push, 1)
  35
  36 /* Single-page buffer */
  37 struct hv_page_buffer {
  38         u32 len;
  39         u32 offset;
  40         u64 pfn;
  41 };
  42
  43 /* Multiple-page buffer */
  44 struct hv_multipage_buffer {
  45         /* Length and Offset determines the # of pfns in the array */
  46         u32 len;
  47         u32 offset;
  48         u64 pfn_array[MAX_MULTIPAGE_BUFFER_COUNT];
  49 };
  50
  51 /* 0x18 includes the proprietary packet header */
  52 #define MAX_PAGE_BUFFER_PACKET          (0x18 +                 \
  53                                         (sizeof(struct hv_page_buffer) * \
  54                                          MAX_PAGE_BUFFER_COUNT))
  55 #define MAX_MULTIPAGE_BUFFER_PACKET     (0x18 +                 \
  56                                          sizeof(struct hv_multipage_buffer))
  57
  58
  59 #pragma pack(pop)
  60
  61 struct hv_driver;
  62 struct hv_device;
  63
  64 struct hv_dev_port_info {
  65         u32 int_mask;
  66         u32 read_idx;
  67         u32 write_idx;
  68         u32 bytes_avail_toread;
  69         u32 bytes_avail_towrite;
  70 };
  71
  72 struct hv_device_info {
  73         u32 chn_id;
  74         u32 chn_state;
  75         struct hv_guid chn_type;
  76         struct hv_guid chn_instance;
  77
  78         u32 monitor_id;
  79         u32 server_monitor_pending;
  80         u32 server_monitor_latency;
  81         u32 server_monitor_conn_id;
  82         u32 client_monitor_pending;
  83         u32 client_monitor_latency;
  84         u32 client_monitor_conn_id;
  85
  86         struct hv_dev_port_info inbound;
  87         struct hv_dev_port_info outbound;
  88 };
  89
  90 /* Base driver object */
  91 struct hv_driver {
  92         const char *name;
  93
  94         /* the device type supported by this driver */
  95         struct hv_guid dev_type;
  96
  97         struct device_driver driver;
  98
  99         int (*dev_add)(struct hv_device *device, void *data);
 100         int (*dev_rm)(struct hv_device *device);
 101         void (*cleanup)(struct hv_driver *driver);
 102 };
 103
 104 /* Base device object */
 105 struct hv_device {
 106         /* the driver for this device */
 107         struct hv_driver *drv;
 108
 109         char name[64];
 110
 111         struct work_struct probe_failed_work_item;
 112
 113         int probe_error;
 114
 115         /* the device type id of this device */
 116         struct hv_guid dev_type;
 117
 118         /* the device instance id of this device */
 119         struct hv_guid dev_instance;
 120
 121         struct device device;
 122
 123         struct vmbus_channel *channel;
 124
 125         /* Device extension; */
 126         void *ext;
 127 };
 128
 129 #endif /* _VMBUS_API_H_ */