drivers/xen/xenbus/xenbus_probe.h

   1 /******************************************************************************
   2  * xenbus_probe.h
   3  *
   4  * Talks to Xen Store to figure out what devices we have.
   5  *
   6  * Copyright (C) 2005 Rusty Russell, IBM Corporation
   7  * Copyright (C) 2005 XenSource Ltd.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License version 2
  11  * as published by the Free Software Foundation; or, when distributed
  12  * separately from the Linux kernel or incorporated into other
  13  * software packages, subject to the following license:
  14  *
  15  * Permission is hereby granted, free of charge, to any person obtaining a copy
  16  * of this source file (the "Software"), to deal in the Software without
  17  * restriction, including without limitation the rights to use, copy, modify,
  18  * merge, publish, distribute, sublicense, and/or sell copies of the Software,
  19  * and to permit persons to whom the Software is furnished to do so, subject to
  20  * the following conditions:
  21  *
  22  * The above copyright notice and this permission notice shall be included in
  23  * all copies or substantial portions of the Software.
  24  *
  25  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  26  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  27  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  28  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  29  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  30  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  31  * IN THE SOFTWARE.
  32  */
  33
  34 #ifndef _XENBUS_PROBE_H
  35 #define _XENBUS_PROBE_H
  36
  37 #define XEN_BUS_ID_SIZE                 20
  38
  39 struct xen_bus_type {
  40         char *root;
  41         unsigned int levels;
  42         int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename);
  43         int (*probe)(struct xen_bus_type *bus, const char *type,
  44                      const char *dir);
  45         void (*otherend_changed)(struct xenbus_watch *watch, const char **vec,
  46                                  unsigned int len);
  47         struct bus_type bus;
  48 };
  49
  50 enum xenstore_init {
  51         XS_UNKNOWN,
  52         XS_PV,
  53         XS_HVM,
  54         XS_LOCAL,
  55 };
  56
  57 extern const struct attribute_group *xenbus_dev_groups[];
  58
  59 extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
  60 extern int xenbus_dev_probe(struct device *_dev);
  61 extern int xenbus_dev_remove(struct device *_dev);
  62 extern int xenbus_register_driver_common(struct xenbus_driver *drv,
  63                                          struct xen_bus_type *bus,
  64                                          struct module *owner,
  65                                          const char *mod_name);
  66 extern int xenbus_probe_node(struct xen_bus_type *bus,
  67                              const char *type,
  68                              const char *nodename);
  69 extern int xenbus_probe_devices(struct xen_bus_type *bus);
  70
  71 extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
  72
  73 extern void xenbus_dev_shutdown(struct device *_dev);
  74
  75 extern int xenbus_dev_suspend(struct device *dev);
  76 extern int xenbus_dev_resume(struct device *dev);
  77 extern int xenbus_dev_cancel(struct device *dev);
  78
  79 extern void xenbus_otherend_changed(struct xenbus_watch *watch,
  80                                     const char **vec, unsigned int len,
  81                                     int ignore_on_shutdown);
  82
  83 extern int xenbus_read_otherend_details(struct xenbus_device *xendev,
  84                                         char *id_node, char *path_node);
  85
  86 void xenbus_ring_ops_init(void);
  87
  88 #endif