tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _SCSI_DISK_H
2#define _SCSI_DISK_H
3
4/*
5 * More than enough for everybody ;) The huge number of majors
6 * is a leftover from 16bit dev_t days, we don't really need that
7 * much numberspace.
8 */
9#define SD_MAJORS 16
10
11/*
12 * This is limited by the naming scheme enforced in sd_probe,
13 * add another character to it if you really need more disks.
14 */
15#define SD_MAX_DISKS (((26 * 26) + 26 + 1) * 26)
16
17/*
18 * Time out in seconds for disks and Magneto-opticals (which are slower).
19 */
20#define SD_TIMEOUT (30 * HZ)
21#define SD_MOD_TIMEOUT (75 * HZ)
22
23/*
24 * Number of allowed retries
25 */
26#define SD_MAX_RETRIES 5
27#define SD_PASSTHROUGH_RETRIES 1
28
29/*
30 * Size of the initial data buffer for mode and read capacity data
31 */
32#define SD_BUF_SIZE 512
33
34struct scsi_disk {
35 struct scsi_driver *driver; /* always &sd_template */
36 struct scsi_device *device;
37 struct class_device cdev;
38 struct gendisk *disk;
39 unsigned int openers; /* protected by BKL for now, yuck */
40 sector_t capacity; /* size in 512-byte sectors */
41 u32 index;
42 u8 media_present;
43 u8 write_prot;
44 unsigned WCE : 1; /* state of disk WCE bit */
45 unsigned RCD : 1; /* state of disk RCD bit, unused */
46 unsigned DPOFUA : 1; /* state of disk DPOFUA bit */
47};
48#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)
49
50#define sd_printk(prefix, sdsk, fmt, a...) \
51 (sdsk)->disk ? \
52 sdev_printk(prefix, (sdsk)->device, "[%s] " fmt, \
53 (sdsk)->disk->disk_name, ##a) : \
54 sdev_printk(prefix, (sdsk)->device, fmt, ##a)
55
56#endif /* _SCSI_DISK_H */