tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * (C) 2003 David Woodhouse <dwmw2@infradead.org>
3 *
4 * Interface to Linux block layer for MTD 'translation layers'.
5 *
6 */
7
8#ifndef __MTD_TRANS_H__
9#define __MTD_TRANS_H__
10
11#include <linux/mutex.h>
12
13struct hd_geometry;
14struct mtd_info;
15struct mtd_blktrans_ops;
16struct file;
17struct inode;
18
19struct mtd_blktrans_dev {
20 struct mtd_blktrans_ops *tr;
21 struct list_head list;
22 struct mtd_info *mtd;
23 struct mutex lock;
24 int devnum;
25 unsigned long size;
26 int readonly;
27 void *blkcore_priv; /* gendisk in 2.5, devfs_handle in 2.4 */
28};
29
30struct blkcore_priv; /* Differs for 2.4 and 2.5 kernels; private */
31
32struct mtd_blktrans_ops {
33 char *name;
34 int major;
35 int part_bits;
36 int blksize;
37 int blkshift;
38
39 /* Access functions */
40 int (*readsect)(struct mtd_blktrans_dev *dev,
41 unsigned long block, char *buffer);
42 int (*writesect)(struct mtd_blktrans_dev *dev,
43 unsigned long block, char *buffer);
44
45 /* Block layer ioctls */
46 int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);
47 int (*flush)(struct mtd_blktrans_dev *dev);
48
49 /* Called with mtd_table_mutex held; no race with add/remove */
50 int (*open)(struct mtd_blktrans_dev *dev);
51 int (*release)(struct mtd_blktrans_dev *dev);
52
53 /* Called on {de,}registration and on subsequent addition/removal
54 of devices, with mtd_table_mutex held. */
55 void (*add_mtd)(struct mtd_blktrans_ops *tr, struct mtd_info *mtd);
56 void (*remove_dev)(struct mtd_blktrans_dev *dev);
57
58 struct list_head devs;
59 struct list_head list;
60 struct module *owner;
61
62 struct mtd_blkcore_priv *blkcore_priv;
63};
64
65extern int register_mtd_blktrans(struct mtd_blktrans_ops *tr);
66extern int deregister_mtd_blktrans(struct mtd_blktrans_ops *tr);
67extern int add_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
68extern int del_mtd_blktrans_dev(struct mtd_blktrans_dev *dev);
69
70
71#endif /* __MTD_TRANS_H__ */