2 * Copyright (c) 2010 Isilon Systems, Inc.
3 * Copyright (c) 2010 iX Systems, Inc.
4 * Copyright (c) 2010 Panasas, Inc.
5 * Copyright (c) 2013-2016 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 #include <asm/atomic-long.h>
41 struct file_operations;
45 extern struct cdevsw linuxcdevsw;
46 extern const struct kobj_type linux_cdev_ktype;
47 extern const struct kobj_type linux_cdev_static_ktype;
54 const struct file_operations *ops;
60 cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
63 kobject_init(&cdev->kobj, &linux_cdev_static_ktype);
68 static inline struct linux_cdev *
71 struct linux_cdev *cdev;
73 cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
75 kobject_init(&cdev->kobj, &linux_cdev_ktype);
81 cdev_put(struct linux_cdev *p)
83 kobject_put(&p->kobj);
87 cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
89 struct make_dev_args args;
97 /* Setup arguments for make_dev_s() */
98 make_dev_args_init(&args);
99 args.mda_devsw = &linuxcdevsw;
102 args.mda_mode = 0700;
103 args.mda_si_drv1 = cdev;
105 error = make_dev_s(&args, &cdev->cdev, "%s",
106 kobject_name(&cdev->kobj));
110 kobject_get(cdev->kobj.parent);
115 cdev_add_ext(struct linux_cdev *cdev, dev_t dev, uid_t uid, gid_t gid, int mode)
117 struct make_dev_args args;
122 /* Setup arguments for make_dev_s() */
123 make_dev_args_init(&args);
124 args.mda_devsw = &linuxcdevsw;
127 args.mda_mode = mode;
128 args.mda_si_drv1 = cdev;
130 error = make_dev_s(&args, &cdev->cdev, "%s/%d",
131 kobject_name(&cdev->kobj), MINOR(dev));
135 kobject_get(cdev->kobj.parent);
139 void linux_destroy_dev(struct linux_cdev *);
142 cdev_del(struct linux_cdev *cdev)
145 linux_destroy_dev(cdev);
146 kobject_put(&cdev->kobj);
149 struct linux_cdev *linux_find_cdev(const char *name, unsigned major, unsigned minor);
151 #define cdev linux_cdev
153 #endif /* _LINUX_CDEV_H_ */