aboutsummaryrefslogtreecommitdiff
path: root/sys/compat/linuxkpi/common/include/linux/cdev.h
blob: 9d5b3fb0f240ef59aa28f00b3f23ba47d0440396 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
/*-
 * Copyright (c) 2010 Isilon Systems, Inc.
 * Copyright (c) 2010 iX Systems, Inc.
 * Copyright (c) 2010 Panasas, Inc.
 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */
#ifndef	_LINUX_CDEV_H_
#define	_LINUX_CDEV_H_

#include <linux/kobject.h>
#include <linux/kdev_t.h>
#include <linux/list.h>

struct file_operations;
struct inode;
struct module;

extern struct cdevsw linuxcdevsw;

struct linux_cdev {
	struct kobject	kobj;
	struct module	*owner;
	struct cdev	*cdev;
	dev_t		dev;
	const struct file_operations *ops;
};

static inline void
cdev_release(struct kobject *kobj)
{
	struct linux_cdev *cdev;

	cdev = container_of(kobj, struct linux_cdev, kobj);
	if (cdev->cdev)
		destroy_dev(cdev->cdev);
	kfree(cdev);
}

static inline void
cdev_static_release(struct kobject *kobj)
{
	struct linux_cdev *cdev;

	cdev = container_of(kobj, struct linux_cdev, kobj);
	if (cdev->cdev)
		destroy_dev(cdev->cdev);
}

static struct kobj_type cdev_ktype = {
	.release = cdev_release,
};

static struct kobj_type cdev_static_ktype = {
	.release = cdev_static_release,
};

static inline void
cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
{

	kobject_init(&cdev->kobj, &cdev_static_ktype);
	cdev->ops = ops;
}

static inline struct linux_cdev *
cdev_alloc(void)
{
	struct linux_cdev *cdev;

	cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
	if (cdev)
		kobject_init(&cdev->kobj, &cdev_ktype);
	return (cdev);
}

static inline void
cdev_put(struct linux_cdev *p)
{
	kobject_put(&p->kobj);
}

static inline int
cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
{
	if (count != 1)
		panic("cdev_add: Unsupported count: %d", count);
	cdev->cdev = make_dev(&linuxcdevsw, MINOR(dev), 0, 0, 0700, 
	    "%s", kobject_name(&cdev->kobj));
	cdev->dev = dev;
	cdev->cdev->si_drv1 = cdev;

	return (0);
}

static inline void
cdev_del(struct linux_cdev *cdev)
{
	if (cdev->cdev) {
		destroy_dev(cdev->cdev);
		cdev->cdev = NULL;
	}
	kobject_put(&cdev->kobj);
}

#define	cdev	linux_cdev

#endif	/* _LINUX_CDEV_H_ */