1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* Copyright (c) 1996, 1997, 1998 The University of Utah and the Flux Group.
*
* This file is part of the OSKit Linux Glue Libraries, which are free
* software, also known as "open source;" you can redistribute them and/or
* modify them under the terms of the GNU General Public License (GPL),
* version 2, as published by the Free Software Foundation (FSF).
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Linux block emulation definitions.
*/
#ifndef _LINUX_BLOCK_H_
#define _LINUX_BLOCK_H_
#include <oskit/io/blkio.h>
#include <oskit/dev/blk.h>
/*
* One of these structures exists for each
* open block device.
*/
struct peropen {
oskit_blkio_t ioi; /* COM block I/O interface */
unsigned count; /* reference count */
unsigned short busy:1; /* someone is opening the device */
unsigned short want:1; /* someone wants the device */
struct wait_queue *waitq; /* for notifiations on this struct */
int mode; /* open mode */
struct inode inode; /* Linux inode structure */
struct file_operations *fops; /* Linux file operations vector */
int bsize; /* block size */
int bshift; /* block shift */
int bmask; /* block mask */
unsigned size; /* size in sectors (512 bytes) */
struct peropen *next; /* next peropen in list */
};
/*
* One these exists for each registered Linux block device driver.
* Each of these structures represents a COM block device object,
* whose primary interface is the oskit_blkdev interface, blki.
*
* Note that for Linux block devices that actually represent buses
* whose individual devices are selected by minor number (e.g., IDE, SCSI),
* the device node registered here is really the bus device node
* (e.g., IDE controller or SCSI host adaptor);
* the device nodes for the individual disks or whatever hang off of them.
*/
struct device_struct {
/* The following members are set by oskit_linux_block_register() */
oskit_blkdev_t blki; /* COM fdev block device interface */
oskit_devinfo_t *info; /* Descriptive info on device */
oskit_driver_t *drv; /* Reference to driver interface */
/* The following members are set by blkdev_register() */
struct file_operations *fops; /* Linux file operations vector */
const char *name; /* Device name */
};
extern struct device_struct blkdevs[];
#define DISK_BLOCK_SIZE 512
#define DISK_BLOCK_BITS 9
/*
* Register a Linux block device in the oskit device hierarchy,
* as an immediate child of the standard ISA bus at the specified I/O address.
*/
oskit_error_t oskit_linux_block_register(int major, unsigned ioaddr,
oskit_devinfo_t *info, oskit_driver_t *drv);
#endif /* _LINUX_BLOCK_H_ */
|
