LXR linux/drivers/staging/hv/vmbus

   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 */
  37struct hv_page_buffer {
  38        u32 len;
  39        u32 offset;
  40        u64 pfn;
  41};
  42
  43/* Multiple-page buffer */
  44struct 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
  61struct hv_driver;
  62struct hv_device;
  63
  64struct 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
  72struct 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 */
  91struct hv_driver {
  92        const char *name;
  93
  94        /* the device type supported by this driver */
  95        struct hv_guid dev_type;
  96
  97        /*
  98         * Device type specific drivers (net, blk etc.)
  99         * need a mechanism to get a pointer to
 100         * device type specific driver structure given
 101         * a pointer to the base hyperv driver structure.
 102         * The current code solves this problem using
 103         * a hack. Support this need explicitly
 104         */
 105        void *priv;
 106
 107        struct device_driver driver;
 108
 109        int (*dev_add)(struct hv_device *device, void *data);
 110        int (*dev_rm)(struct hv_device *device);
 111        void (*cleanup)(struct hv_driver *driver);
 112};
 113
 114/* Base device object */
 115struct hv_device {
 116        /* the driver for this device */
 117        struct hv_driver *drv;
 118
 119        char name[64];
 120
 121        struct work_struct probe_failed_work_item;
 122
 123        int probe_error;
 124
 125        /* the device type id of this device */
 126        struct hv_guid dev_type;
 127
 128        /* the device instance id of this device */
 129        struct hv_guid dev_instance;
 130
 131        struct device device;
 132
 133        struct vmbus_channel *channel;
 134
 135        /* Device extension; */
 136        void *ext;
 137};
 138
 139#endif /* _VMBUS_API_H_ */
 140