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.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice unmodified, this list of conditions, and the following
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.
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.
31 #ifndef _LINUX_CDEV_H_
32 #define _LINUX_CDEV_H_
34 #include <linux/kobject.h>
35 #include <linux/sysfs.h>
36 #include <linux/kdev_t.h>
37 #include <linux/list.h>
39 struct file_operations;
43 extern struct cdevsw linuxcdevsw;
50 const struct file_operations *ops;
54 cdev_release(struct kobject *kobj)
56 struct linux_cdev *cdev;
58 cdev = container_of(kobj, struct linux_cdev, kobj);
60 destroy_dev(cdev->cdev);
65 cdev_static_release(struct kobject *kobj)
67 struct linux_cdev *cdev;
69 cdev = container_of(kobj, struct linux_cdev, kobj);
71 destroy_dev(cdev->cdev);
74 static struct kobj_type cdev_ktype = {
75 .release = cdev_release,
78 static struct kobj_type cdev_static_ktype = {
79 .release = cdev_static_release,
83 cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
86 kobject_init(&cdev->kobj, &cdev_static_ktype);
90 static inline struct linux_cdev *
93 struct linux_cdev *cdev;
95 cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
97 kobject_init(&cdev->kobj, &cdev_ktype);
102 cdev_put(struct linux_cdev *p)
104 kobject_put(&p->kobj);
108 cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
111 panic("cdev_add: Unsupported count: %d", count);
112 cdev->cdev = make_dev(&linuxcdevsw, MINOR(dev), 0, 0, 0700,
113 "%s", kobject_name(&cdev->kobj));
115 cdev->cdev->si_drv1 = cdev;
121 cdev_del(struct linux_cdev *cdev)
124 destroy_dev(cdev->cdev);
127 kobject_put(&cdev->kobj);
130 #define cdev linux_cdev
132 #endif /* _LINUX_CDEV_H_ */