LXR linux/drivers/xen/xenbus/xenbus

   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
  39struct 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
  50enum xenstore_init {
  51        XS_UNKNOWN,
  52        XS_PV,
  53        XS_HVM,
  54        XS_LOCAL,
  55};
  56
  57extern const struct attribute_group *xenbus_dev_groups[];
  58
  59extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
  60extern int xenbus_dev_probe(struct device *_dev);
  61extern int xenbus_dev_remove(struct device *_dev);
  62extern int xenbus_register_driver_common(struct xenbus_driver *drv,
  63                                         struct xen_bus_type *bus,
  64                                         struct module *owner,
  65                                         const char *mod_name);
  66extern int xenbus_probe_node(struct xen_bus_type *bus,
  67                             const char *type,
  68                             const char *nodename);
  69extern int xenbus_probe_devices(struct xen_bus_type *bus);
  70
  71extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
  72
  73extern void xenbus_dev_shutdown(struct device *_dev);
  74
  75extern int xenbus_dev_suspend(struct device *dev);
  76extern int xenbus_dev_resume(struct device *dev);
  77extern int xenbus_dev_cancel(struct device *dev);
  78
  79extern void xenbus_otherend_changed(struct xenbus_watch *watch,
  80                                    const char **vec, unsigned int len,
  81                                    int ignore_on_shutdown);
  82
  83extern int xenbus_read_otherend_details(struct xenbus_device *xendev,
  84                                        char *id_node, char *path_node);
  85
  86void xenbus_ring_ops_init(void);
  87
  88#endif
  89