1/*-
2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice unmodified, this list of conditions, and the following
13 *    disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 * $FreeBSD: releng/11.0/sys/compat/linuxkpi/common/include/linux/miscdevice.h 292987 2015-12-31 12:30:19Z hselasky $
30 */
31#ifndef	_LINUX_MISCDEVICE_H_
32#define	_LINUX_MISCDEVICE_H_
33
34#define	MISC_DYNAMIC_MINOR	-1
35
36#include <linux/device.h>
37#include <linux/cdev.h>
38
39struct miscdevice  {
40	const char	*name;
41	struct device	*this_device;
42	const struct file_operations *fops;
43	struct cdev	*cdev;
44	int		minor;
45	const char *nodename;
46	umode_t mode;
47};
48
49extern struct class linux_class_misc;
50
51static inline int
52misc_register(struct miscdevice *misc)
53{
54	misc->this_device = device_create(&linux_class_misc,
55	    &linux_root_device, 0, misc, misc->name);
56	misc->cdev = cdev_alloc();
57	if (misc->cdev == NULL)
58		return -ENOMEM;
59	misc->cdev->owner = THIS_MODULE;
60	misc->cdev->ops = misc->fops;
61	kobject_set_name(&misc->cdev->kobj, misc->name);
62        if (cdev_add(misc->cdev, misc->this_device->devt, 1))
63		return -EINVAL;
64	return (0);
65}
66
67static inline int
68misc_deregister(struct miscdevice *misc)
69{
70	device_destroy(&linux_class_misc, misc->this_device->devt);
71	cdev_del(misc->cdev);
72
73	return (0);
74}
75
76#endif	/* _LINUX_MISCDEVICE_H_ */
77