[linux-2.6-block.git] / include / scsi / sd.h

#ifndef _SCSI_DISK_H
#define _SCSI_DISK_H

/*
 * More than enough for everybody ;)  The huge number of majors
 * is a leftover from 16bit dev_t days, we don't really need that
 * much numberspace.
 */
#define SD_MAJORS	16

/*
 * This is limited by the naming scheme enforced in sd_probe,
 * add another character to it if you really need more disks.
 */
#define SD_MAX_DISKS	(((26 * 26) + 26 + 1) * 26)

/*
 * Time out in seconds for disks and Magneto-opticals (which are slower).
 */
#define SD_TIMEOUT		(30 * HZ)
#define SD_MOD_TIMEOUT		(75 * HZ)

/*
 * Number of allowed retries
 */
#define SD_MAX_RETRIES		5
#define SD_PASSTHROUGH_RETRIES	1

/*
 * Size of the initial data buffer for mode and read capacity data
 */
#define SD_BUF_SIZE		512

struct scsi_disk {
	struct scsi_driver *driver;	/* always &sd_template */
	struct scsi_device *device;
	struct class_device cdev;
	struct gendisk	*disk;
	unsigned int	openers;	/* protected by BKL for now, yuck */
	sector_t	capacity;	/* size in 512-byte sectors */
	u32		index;
	u8		media_present;
	u8		write_prot;
	unsigned	WCE : 1;	/* state of disk WCE bit */
	unsigned	RCD : 1;	/* state of disk RCD bit, unused */
	unsigned	DPOFUA : 1;	/* state of disk DPOFUA bit */
};
#define to_scsi_disk(obj) container_of(obj,struct scsi_disk,cdev)

static int  sd_revalidate_disk(struct gendisk *disk);
static void sd_rw_intr(struct scsi_cmnd * SCpnt);
static int  sd_probe(struct device *);
static int  sd_remove(struct device *);
static void sd_shutdown(struct device *dev);
static int sd_suspend(struct device *dev, pm_message_t state);
static int sd_resume(struct device *dev);
static void sd_rescan(struct device *);
static int  sd_init_command(struct scsi_cmnd *);
static int  sd_issue_flush(struct device *, sector_t *);
static void sd_prepare_flush(struct request_queue *, struct request *);
static void sd_read_capacity(struct scsi_disk *sdkp, unsigned char *buffer);
static void scsi_disk_release(struct class_device *cdev);
static void sd_print_sense_hdr(struct scsi_disk *, struct scsi_sense_hdr *);
static void sd_print_result(struct scsi_disk *, int);

#define sd_printk(prefix, sdsk, fmt, a...)				\
        (sdsk)->disk ?							\
	sdev_printk(prefix, (sdsk)->device, "[%s] " fmt,		\
		    (sdsk)->disk->disk_name, ##a) :			\
	sdev_printk(prefix, (sdsk)->device, fmt, ##a)

#endif /* _SCSI_DISK_H */
Commit	Line	Data
e73aec82 MP	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
	34	struct 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	static int sd_revalidate_disk(struct gendisk *disk);
	51	static void sd_rw_intr(struct scsi_cmnd * SCpnt);
	52	static int sd_probe(struct device *);
	53	static int sd_remove(struct device *);
	54	static void sd_shutdown(struct device *dev);
c3c94c5a TH	55	static int sd_suspend(struct device *dev, pm_message_t state);
c3c94c5a TH	56	static int sd_resume(struct device *dev);
e73aec82 MP	57	static void sd_rescan(struct device *);
	58	static int sd_init_command(struct scsi_cmnd *);
	59	static int sd_issue_flush(struct device , sector_t );
165125e1	60	static void sd_prepare_flush(struct request_queue , struct request );
e73aec82 MP	61	static void sd_read_capacity(struct scsi_disk sdkp, unsigned char buffer);
	62	static void scsi_disk_release(struct class_device *cdev);
	63	static void sd_print_sense_hdr(struct scsi_disk , struct scsi_sense_hdr );
	64	static 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 */