Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright © 2003-2010 David Woodhouse <dwmw2@infradead.org>
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 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 */
19
20#ifndef __MTD_TRANS_H__
21#define __MTD_TRANS_H__
22
23#include <linux/mutex.h>
24#include <linux/kref.h>
25#include <linux/sysfs.h>
26
27struct hd_geometry;
28struct mtd_info;
29struct mtd_blktrans_ops;
30struct file;
31struct inode;
32
33struct mtd_blktrans_dev {
34 struct mtd_blktrans_ops *tr;
35 struct list_head list;
36 struct mtd_info *mtd;
37 struct mutex lock;
38 int devnum;
39 unsigned long size;
40 int readonly;
41 int open;
42 struct kref ref;
43 struct gendisk *disk;
44 struct attribute_group *disk_attributes;
45 struct task_struct *thread;
46 struct request_queue *rq;
47 spinlock_t queue_lock;
48 void *priv;
49};
50
51struct mtd_blktrans_ops {
52 char *name;
53 int major;
54 int part_bits;
55 int blksize;
56 int blkshift;
57
58 /* Access functions */
59 int (*readsect)(struct mtd_blktrans_dev *dev,
60 unsigned long block, char *buffer);
61 int (*writesect)(struct mtd_blktrans_dev *dev,
62 unsigned long block, char *buffer);
63 int (*discard)(struct mtd_blktrans_dev *dev,
64 unsigned long block, unsigned nr_blocks);
65
66 /* Block layer ioctls */
67 int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
68 int (*flush)(struct mtd_blktrans_dev *dev);
69
70 /* Called with mtd_table_mutex held; no race with add/remove */
71 int (*open)(struct mtd_blktrans_dev *dev);
72 int (*release)(struct mtd_blktrans_dev *dev);
73
74 /* Called on {de,}registration and on subsequent addition/removal
75 of devices, with mtd_table_mutex held. */
76 void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
77 void (*remove_dev)(struct mtd_blktrans_dev *dev);
78
79 struct list_head devs;
80 struct list_head list;
81 struct module *owner;
82};
83
84extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
85extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
86extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
87extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
88
89
90#endif /* __MTD_TRANS_H__ */