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kernel/linux-rt-4.4.41/drivers/xen/xenbus/xenbus_probe.h 3.17 KB
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  /******************************************************************************
   * xenbus_probe.h
   *
   * Talks to Xen Store to figure out what devices we have.
   *
   * Copyright (C) 2005 Rusty Russell, IBM Corporation
   * Copyright (C) 2005 XenSource Ltd.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License version 2
   * as published by the Free Software Foundation; or, when distributed
   * separately from the Linux kernel or incorporated into other
   * software packages, subject to the following license:
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this source file (the "Software"), to deal in the Software without
   * restriction, including without limitation the rights to use, copy, modify,
   * merge, publish, distribute, sublicense, and/or sell copies of the Software,
   * and to permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
   * IN THE SOFTWARE.
   */
  
  #ifndef _XENBUS_PROBE_H
  #define _XENBUS_PROBE_H
  
  #define XEN_BUS_ID_SIZE			20
  
  struct xen_bus_type {
  	char *root;
  	unsigned int levels;
  	int (*get_bus_id)(char bus_id[XEN_BUS_ID_SIZE], const char *nodename);
  	int (*probe)(struct xen_bus_type *bus, const char *type,
  		     const char *dir);
  	void (*otherend_changed)(struct xenbus_watch *watch, const char **vec,
  				 unsigned int len);
  	struct bus_type bus;
  };
  
  enum xenstore_init {
  	XS_UNKNOWN,
  	XS_PV,
  	XS_HVM,
  	XS_LOCAL,
  };
  
  extern const struct attribute_group *xenbus_dev_groups[];
  
  extern int xenbus_match(struct device *_dev, struct device_driver *_drv);
  extern int xenbus_dev_probe(struct device *_dev);
  extern int xenbus_dev_remove(struct device *_dev);
  extern int xenbus_register_driver_common(struct xenbus_driver *drv,
  					 struct xen_bus_type *bus,
  					 struct module *owner,
  					 const char *mod_name);
  extern int xenbus_probe_node(struct xen_bus_type *bus,
  			     const char *type,
  			     const char *nodename);
  extern int xenbus_probe_devices(struct xen_bus_type *bus);
  
  extern void xenbus_dev_changed(const char *node, struct xen_bus_type *bus);
  
  extern void xenbus_dev_shutdown(struct device *_dev);
  
  extern int xenbus_dev_suspend(struct device *dev);
  extern int xenbus_dev_resume(struct device *dev);
  extern int xenbus_dev_cancel(struct device *dev);
  
  extern void xenbus_otherend_changed(struct xenbus_watch *watch,
  				    const char **vec, unsigned int len,
  				    int ignore_on_shutdown);
  
  extern int xenbus_read_otherend_details(struct xenbus_device *xendev,
  					char *id_node, char *path_node);
  
  void xenbus_ring_ops_init(void);
  
  #endif