482 struct ide_drive_s {  struct
483 	char		name[4];	/* drive name, such as "hda" */
484         char            driver_req[10];	/* requests specific driver */
486 	struct request_queue	*queue;	/* request queue */
488 	struct request		*rq;	/* current request */
489 	void		*driver_data;	/* extra driver data */
490 	u16			*id;	/* identification info */
492 	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
493 	const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
495 	struct hwif_s		*hwif;	/* actually (ide_hwif_t *) */
497 	const struct ide_disk_ops *disk_ops;
499 	unsigned long dev_flags;
501 	unsigned long sleep;		/* sleep until this time */
502 	unsigned long timeout;		/* max time to wait for irq */
504 	u8	special_flags;		/* special action flags */
506 	u8	select;			/* basic drive/head select reg value */
507 	u8	retry_pio;		/* retrying dma capable host in pio */
508 	u8	waiting_for_dma;	/* dma currently in progress */
509 	u8	dma;			/* atapi dma flag */
511         u8	init_speed;	/* transfer rate set at boot */
512         u8	current_speed;	/* current transfer rate set */
513 	u8	desired_speed;	/* desired transfer rate set */
514 	u8	pio_mode;	/* for ->set_pio_mode _only_ */
515 	u8	dma_mode;	/* for ->set_dma_mode _only_ */
516 	u8	dn;		/* now wide spread use */
517 	u8	acoustic;	/* acoustic management */
518 	u8	media;		/* disk, cdrom, tape, floppy, ... */
519 	u8	ready_stat;	/* min status value for drive ready */
520 	u8	mult_count;	/* current multiple sector setting */
521 	u8	mult_req;	/* requested multiple sector setting */
522 	u8	io_32bit;	/* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
523 	u8	bad_wstat;	/* used for ignoring ATA_DF */
524 	u8	head;		/* "real" number of heads */
525 	u8	sect;		/* "real" sectors per track */
526 	u8	bios_head;	/* BIOS/fdisk/LILO number of heads */
527 	u8	bios_sect;	/* BIOS/fdisk/LILO sectors per track */
530 	u8 pc_delay;
532 	unsigned int	bios_cyl;	/* BIOS/fdisk/LILO number of cyls */
533 	unsigned int	cyl;		/* "real" number of cyls */
534 	void		*drive_data;	/* used by set_pio_mode/dev_select() */
535 	unsigned int	failures;	/* current failure count */
559 	int  (*pc_callback)(struct ide_drive_s *, int);  argument
561 	ide_startstop_t (*irq_handler)(struct ide_drive_s *);  argument
573 typedef struct ide_drive_s ide_drive_t;  argument