drivers/ide/ataraid.h

   1 /*
   2    ataraid.h  Copyright (C) 2001 Red Hat, Inc. All rights reserved.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    You should have received a copy of the GNU General Public License
  10    (for example /usr/src/linux/COPYING); if not, write to the Free
  11    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  12
  13    Authors:     Arjan van de Ven <arjanv@redhat.com>
  14
  15
  16 */
  17
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/kernel.h>
  21 #include <asm/semaphore.h>
  22 #include <linux/blkdev.h>
  23 #include <linux/blkpg.h>
  24 #include <linux/genhd.h>
  25 #include <linux/ioctl.h>
  26
  27 #include <linux/ide.h>
  28 #include <asm/uaccess.h>
  29
  30 #define ATAMAJOR 114
  31 #define SHIFT 4
  32 #define MINOR_MASK 15
  33 #define MAJOR_MASK 15
  34
  35
  36 /* raid_device_operations is a light struct block_device_operations with an
  37    added method for make_request */
  38 struct raid_device_operations {
  39         int (*open) (struct inode *, struct file *);
  40         int (*release) (struct inode *, struct file *);
  41         int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
  42         int (*make_request) (request_queue_t *q, int rw, struct buffer_head * bh);
  43 };
  44
  45
  46 struct geom {
  47         unsigned char heads;
  48         unsigned int cylinders;
  49         unsigned char sectors;
  50 };
  51
  52 /* structure for the splitting of bufferheads */
  53
  54 struct ataraid_bh_private {
  55         struct buffer_head *parent;
  56         atomic_t count;
  57 };
  58
  59 extern struct gendisk ataraid_gendisk;
  60
  61 extern int ataraid_get_device(struct raid_device_operations *fops);
  62 extern void ataraid_release_device(int device);
  63 extern int get_blocksize(kdev_t dev);
  64 extern void ataraid_register_disk(int device,long size);
  65 extern struct buffer_head *ataraid_get_bhead(void);
  66 extern struct ataraid_bh_private *ataraid_get_private(void);
  67 extern void ataraid_end_request(struct buffer_head *bh, int uptodate);
  68
  69
  70
  71
  72