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#ifdef CONFIG_XEN_BACKEND 40extern void xenbus_backend_suspend(int (*fn)(struct device *, void *)); 41extern void xenbus_backend_resume(int (*fn)(struct device *, void *)); 42extern void xenbus_backend_probe_and_watch(void); 43extern int xenbus_backend_bus_register(void); 44extern void xenbus_backend_bus_unregister(void); 45#else 46static inline void xenbus_backend_suspend(int (*fn)(struct device *, void *)) {} 47static inline void xenbus_backend_resume(int (*fn)(struct device *, void *)) {} 48static inline void xenbus_backend_probe_and_watch(void) {} 49static inline int xenbus_backend_bus_register(void) { return 0; } 50static inline void xenbus_backend_bus_unregister(void) {} 51#endif 52 53struct xen_bus_type 54{ 55 char *root; 56 unsigned int levels; 57 int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename); 58 int (*probe)(const char *type, const char *dir); 59 struct bus_type bus; 60}; 61 62extern int xenbus_match(struct device *_dev, struct device_driver *_drv); 63extern int xenbus_dev_probe(struct device *_dev); 64extern int xenbus_dev_remove(struct device *_dev); 65extern int xenbus_register_driver_common(struct xenbus_driver *drv, 66 struct xen_bus_type *bus, 67 struct module *owner, 68 const char *mod_name); 69extern int xenbus_probe_node(struct xen_bus_type *bus, 70 const char *type, 71 const char *nodename); 72extern int xenbus_probe_devices(struct xen_bus_type *bus); 73 74extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus); 75 76#endif 77