1219820Sjeff/*- 2219820Sjeff * Copyright (c) 2010 Isilon Systems, Inc. 3219820Sjeff * Copyright (c) 2010 iX Systems, Inc. 4219820Sjeff * Copyright (c) 2010 Panasas, Inc. 5219820Sjeff * All rights reserved. 6219820Sjeff * 7219820Sjeff * Redistribution and use in source and binary forms, with or without 8219820Sjeff * modification, are permitted provided that the following conditions 9219820Sjeff * are met: 10219820Sjeff * 1. Redistributions of source code must retain the above copyright 11219820Sjeff * notice unmodified, this list of conditions, and the following 12219820Sjeff * disclaimer. 13219820Sjeff * 2. Redistributions in binary form must reproduce the above copyright 14219820Sjeff * notice, this list of conditions and the following disclaimer in the 15219820Sjeff * documentation and/or other materials provided with the distribution. 16219820Sjeff * 17219820Sjeff * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18219820Sjeff * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19219820Sjeff * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20219820Sjeff * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21219820Sjeff * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22219820Sjeff * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23219820Sjeff * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24219820Sjeff * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25219820Sjeff * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26219820Sjeff * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27219820Sjeff */ 28219820Sjeff 29219820Sjeff#ifndef _LINUX_MISCDEVICE_H_ 30219820Sjeff#define _LINUX_MISCDEVICE_H_ 31219820Sjeff 32219820Sjeff#define MISC_DYNAMIC_MINOR -1 33219820Sjeff 34219820Sjeff#include <linux/device.h> 35219820Sjeff#include <linux/cdev.h> 36219820Sjeff 37219820Sjeffstruct miscdevice { 38219820Sjeff const char *name; 39219820Sjeff struct device *this_device; 40219820Sjeff const struct file_operations *fops; 41219820Sjeff struct cdev *cdev; 42219820Sjeff int minor; 43219820Sjeff}; 44219820Sjeff 45219820Sjeffextern struct class miscclass; 46219820Sjeff 47219820Sjeffstatic inline int 48219820Sjeffmisc_register(struct miscdevice *misc) 49219820Sjeff{ 50219820Sjeff misc->this_device = device_create(&miscclass, &linux_rootdev, 0, misc, 51219820Sjeff misc->name); 52219820Sjeff misc->cdev = cdev_alloc(); 53219820Sjeff if (misc->cdev == NULL) 54219820Sjeff return -ENOMEM; 55219820Sjeff misc->cdev->owner = THIS_MODULE; 56219820Sjeff misc->cdev->ops = misc->fops; 57219820Sjeff kobject_set_name(&misc->cdev->kobj, misc->name); 58219820Sjeff if (cdev_add(misc->cdev, misc->this_device->devt, 1)) 59219820Sjeff return -EINVAL; 60219820Sjeff return (0); 61219820Sjeff} 62219820Sjeff 63219820Sjeffstatic inline int 64219820Sjeffmisc_deregister(struct miscdevice *misc) 65219820Sjeff{ 66219820Sjeff device_destroy(&miscclass, misc->this_device->devt); 67219820Sjeff cdev_del(misc->cdev); 68219820Sjeff 69219820Sjeff return (0); 70219820Sjeff} 71219820Sjeff 72219820Sjeff#endif /* _LINUX_MISCDEVICE_H_ */ 73