2b79a966ab
wide enough to hold the full 64-bit dev_t. Instead use the "dev" field in the "linux_cdev" structure to store and lookup this value. While at it remove superfluous use of parenthesis inside the MAJOR(), MINOR() and MKDEV() macros in the LinuxKPI. MFC after: 1 week Sponsored by: Mellanox Technologies
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/*-
|
|
* Copyright (c) 2010 Isilon Systems, Inc.
|
|
* Copyright (c) 2010 iX Systems, Inc.
|
|
* Copyright (c) 2010 Panasas, Inc.
|
|
* Copyright (c) 2013-2016 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/sysfs.h>
|
|
#include <linux/kdev_t.h>
|
|
#include <linux/list.h>
|
|
|
|
struct file_operations;
|
|
struct inode;
|
|
struct module;
|
|
|
|
extern struct cdevsw linuxcdevsw;
|
|
extern const struct kobj_type linux_cdev_ktype;
|
|
extern const struct kobj_type linux_cdev_static_ktype;
|
|
|
|
struct linux_cdev {
|
|
struct kobject kobj;
|
|
struct module *owner;
|
|
struct cdev *cdev;
|
|
dev_t dev;
|
|
const struct file_operations *ops;
|
|
};
|
|
|
|
static inline void
|
|
cdev_init(struct linux_cdev *cdev, const struct file_operations *ops)
|
|
{
|
|
|
|
kobject_init(&cdev->kobj, &linux_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, &linux_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)
|
|
{
|
|
struct make_dev_args args;
|
|
int error;
|
|
|
|
if (count != 1)
|
|
return (-EINVAL);
|
|
|
|
cdev->dev = dev;
|
|
|
|
/* Setup arguments for make_dev_s() */
|
|
make_dev_args_init(&args);
|
|
args.mda_devsw = &linuxcdevsw;
|
|
args.mda_uid = 0;
|
|
args.mda_gid = 0;
|
|
args.mda_mode = 0700;
|
|
args.mda_si_drv1 = cdev;
|
|
|
|
error = make_dev_s(&args, &cdev->cdev, "%s",
|
|
kobject_name(&cdev->kobj));
|
|
if (error)
|
|
return (-error);
|
|
|
|
kobject_get(cdev->kobj.parent);
|
|
return (0);
|
|
}
|
|
|
|
static inline int
|
|
cdev_add_ext(struct linux_cdev *cdev, dev_t dev, uid_t uid, gid_t gid, int mode)
|
|
{
|
|
struct make_dev_args args;
|
|
int error;
|
|
|
|
cdev->dev = dev;
|
|
|
|
/* Setup arguments for make_dev_s() */
|
|
make_dev_args_init(&args);
|
|
args.mda_devsw = &linuxcdevsw;
|
|
args.mda_uid = uid;
|
|
args.mda_gid = gid;
|
|
args.mda_mode = mode;
|
|
args.mda_si_drv1 = cdev;
|
|
|
|
error = make_dev_s(&args, &cdev->cdev, "%s/%d",
|
|
kobject_name(&cdev->kobj), MINOR(dev));
|
|
if (error)
|
|
return (-error);
|
|
|
|
kobject_get(cdev->kobj.parent);
|
|
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);
|
|
}
|
|
|
|
struct linux_cdev *linux_find_cdev(const char *name, unsigned major, unsigned minor);
|
|
|
|
#define cdev linux_cdev
|
|
|
|
#endif /* _LINUX_CDEV_H_ */
|