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
50static int  sd_revalidate_disk(struct gendisk *disk);
51static void sd_rw_intr(struct scsi_cmnd * SCpnt);
52static int  sd_probe(struct device *);
53static int  sd_remove(struct device *);
54static void sd_shutdown(struct device *dev);
55static int sd_suspend(struct device *dev, pm_message_t state);
56static int sd_resume(struct device *dev);
57static void sd_rescan(struct device *);
58static int  sd_init_command(struct scsi_cmnd *);
59static int  sd_issue_flush(struct device *, sector_t *);
60static void sd_prepare_flush(request_queue_t *, struct request *);
61static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
62static void scsi_disk_release(struct class_device *cdev);
63static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
64static void sd_print_result(struct scsi_disk *, int);
65
66#define sd_printk(prefix, sdsk, fmt, a...)				\
67        (sdsk)->disk ?							\
68	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
69		    (sdsk)->disk->disk_name, ##a) :			\
70	sdev_printk(prefix, (sdsk)->device, fmt, ##a)
71
72#endif /* _SCSI_DISK_H */
73