patch-2.3.1 linux/drivers/block/ide.h

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diff -u --recursive --new-file v2.3.0/linux/drivers/block/ide.h linux/drivers/block/ide.h
@@ -1,769 +0,0 @@
-#ifndef _IDE_H
-#define _IDE_H
-/*
- *  linux/drivers/block/ide.h
- *
- *  Copyright (C) 1994-1998  Linus Torvalds & authors
- */
-
-#include <linux/config.h>
-#include <linux/init.h>
-#include <linux/ioport.h>
-#include <linux/hdreg.h>
-#include <linux/blkdev.h>
-#include <linux/proc_fs.h>
-#include <asm/ide.h>
-
-/*
- * This is the multiple IDE interface driver, as evolved from hd.c.
- * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
- * There can be up to two drives per interface, as per the ATA-2 spec.
- *
- * Primary i/f:    ide0: major=3;  (hda)         minor=0; (hdb)         minor=64
- * Secondary i/f:  ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
- * Tertiary i/f:   ide2: major=33; (hde)         minor=0; (hdf)         minor=64
- * Quaternary i/f: ide3: major=34; (hdg)         minor=0; (hdh)         minor=64
- */
-
-/******************************************************************************
- * IDE driver configuration options (play with these as desired):
- *
- * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
- */
-#undef REALLY_FAST_IO			/* define if ide ports are perfect */
-#define INITIAL_MULT_COUNT	0	/* off=0; on=2,4,8,16,32, etc.. */
-
-#ifndef SUPPORT_SLOW_DATA_PORTS		/* 1 to support slow data ports */
-#define SUPPORT_SLOW_DATA_PORTS	1	/* 0 to reduce kernel size */
-#endif
-#ifndef SUPPORT_VLB_SYNC		/* 1 to support weird 32-bit chips */
-#define SUPPORT_VLB_SYNC	1	/* 0 to reduce kernel size */
-#endif
-#ifndef DISK_RECOVERY_TIME		/* off=0; on=access_delay_time */
-#define DISK_RECOVERY_TIME	0	/*  for hardware that needs it */
-#endif
-#ifndef OK_TO_RESET_CONTROLLER		/* 1 needed for good error recovery */
-#define OK_TO_RESET_CONTROLLER	1	/* 0 for use with AH2372A/B interface */
-#endif
-#ifndef FAKE_FDISK_FOR_EZDRIVE		/* 1 to help linux fdisk with EZDRIVE */
-#define FAKE_FDISK_FOR_EZDRIVE 	1	/* 0 to reduce kernel size */
-#endif
-#ifndef FANCY_STATUS_DUMPS		/* 1 for human-readable drive errors */
-#define FANCY_STATUS_DUMPS	1	/* 0 to reduce kernel size */
-#endif
-
-#ifdef CONFIG_BLK_DEV_CMD640
-#if 0	/* change to 1 when debugging cmd640 problems */
-void cmd640_dump_regs (void);
-#define CMD640_DUMP_REGS cmd640_dump_regs() /* for debugging cmd640 chipset */
-#endif
-#endif  /* CONFIG_BLK_DEV_CMD640 */
-
-/*
- * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
- */
-#define IDE_DRIVE_CMD		99	/* (magic) undef to reduce kernel size*/
-
-/*
- *  "No user-serviceable parts" beyond this point  :)
- *****************************************************************************/
-
-typedef unsigned char	byte;	/* used everywhere */
-
-/*
- * Probably not wise to fiddle with these
- */
-#define ERROR_MAX	8	/* Max read/write errors per sector */
-#define ERROR_RESET	3	/* Reset controller every 4th retry */
-#define ERROR_RECAL	1	/* Recalibrate every 2nd retry */
-
-/*
- * Ensure that various configuration flags have compatible settings
- */
-#ifdef REALLY_SLOW_IO
-#undef REALLY_FAST_IO
-#endif
-
-#define HWIF(drive)		((ide_hwif_t *)((drive)->hwif))
-#define HWGROUP(drive)		((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
-
-/*
- * Definitions for accessing IDE controller registers
- */
-#define IDE_NR_PORTS		(10)
-
-#define IDE_DATA_OFFSET		(0)
-#define IDE_ERROR_OFFSET	(1)
-#define IDE_NSECTOR_OFFSET	(2)
-#define IDE_SECTOR_OFFSET	(3)
-#define IDE_LCYL_OFFSET		(4)
-#define IDE_HCYL_OFFSET		(5)
-#define IDE_SELECT_OFFSET	(6)
-#define IDE_STATUS_OFFSET	(7)
-#define IDE_CONTROL_OFFSET	(8)
-#define IDE_IRQ_OFFSET		(9)
-
-#define IDE_FEATURE_OFFSET	IDE_ERROR_OFFSET
-#define IDE_COMMAND_OFFSET	IDE_STATUS_OFFSET
-
-#define IDE_DATA_REG		(HWIF(drive)->io_ports[IDE_DATA_OFFSET])
-#define IDE_ERROR_REG		(HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
-#define IDE_NSECTOR_REG		(HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
-#define IDE_SECTOR_REG		(HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
-#define IDE_LCYL_REG		(HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
-#define IDE_HCYL_REG		(HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
-#define IDE_SELECT_REG		(HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
-#define IDE_STATUS_REG		(HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
-#define IDE_CONTROL_REG		(HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
-#define IDE_IRQ_REG		(HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
-
-#define IDE_FEATURE_REG		IDE_ERROR_REG
-#define IDE_COMMAND_REG		IDE_STATUS_REG
-#define IDE_ALTSTATUS_REG	IDE_CONTROL_REG
-#define IDE_IREASON_REG		IDE_NSECTOR_REG
-#define IDE_BCOUNTL_REG		IDE_LCYL_REG
-#define IDE_BCOUNTH_REG		IDE_HCYL_REG
-
-#ifdef REALLY_FAST_IO
-#define OUT_BYTE(b,p)		outb((b),(p))
-#define IN_BYTE(p)		(byte)inb(p)
-#else
-#define OUT_BYTE(b,p)		outb_p((b),(p))
-#define IN_BYTE(p)		(byte)inb_p(p)
-#endif /* REALLY_FAST_IO */
-
-#define GET_ERR()		IN_BYTE(IDE_ERROR_REG)
-#define GET_STAT()		IN_BYTE(IDE_STATUS_REG)
-#define OK_STAT(stat,good,bad)	(((stat)&((good)|(bad)))==(good))
-#define BAD_R_STAT		(BUSY_STAT   | ERR_STAT)
-#define BAD_W_STAT		(BAD_R_STAT  | WRERR_STAT)
-#define BAD_STAT		(BAD_R_STAT  | DRQ_STAT)
-#define DRIVE_READY		(READY_STAT  | SEEK_STAT)
-#define DATA_READY		(DRQ_STAT)
-
-/*
- * Some more useful definitions
- */
-#define IDE_MAJOR_NAME	"ide"	/* the same for all i/f; see also genhd.c */
-#define MAJOR_NAME	IDE_MAJOR_NAME
-#define PARTN_BITS	6	/* number of minor dev bits for partitions */
-#define PARTN_MASK	((1<<PARTN_BITS)-1)	/* a useful bit mask */
-#define MAX_DRIVES	2	/* per interface; 2 assumed by lots of code */
-#define SECTOR_WORDS	(512 / 4)	/* number of 32bit words per sector */
-#define IDE_LARGE_SEEK(b1,b2,t)	(((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
-#define IDE_MIN(a,b)	((a)<(b) ? (a):(b))
-#define IDE_MAX(a,b)	((a)>(b) ? (a):(b))
-
-/*
- * Timeouts for various operations:
- */
-#define WAIT_DRQ	(5*HZ/100)	/* 50msec - spec allows up to 20ms */
-#ifdef CONFIG_APM
-#define WAIT_READY	(5*HZ)		/* 5sec - some laptops are very slow */
-#else
-#define WAIT_READY	(3*HZ/100)	/* 30msec - should be instantaneous */
-#endif /* CONFIG_APM */
-#define WAIT_PIDENTIFY	(10*HZ)	/* 10sec  - should be less than 3ms (?)
-				            if all ATAPI CD is closed at boot */
-#define WAIT_WORSTCASE	(30*HZ)	/* 30sec  - worst case when spinning up */
-#define WAIT_CMD	(10*HZ)	/* 10sec  - maximum wait for an IRQ to happen */
-#define WAIT_MIN_SLEEP	(2*HZ/100)	/* 20msec - minimum sleep time */
-
-#define SELECT_DRIVE(hwif,drive)				\
-{								\
-	if (hwif->selectproc)					\
-		hwif->selectproc(drive);			\
-	OUT_BYTE((drive)->select.all, hwif->io_ports[IDE_SELECT_OFFSET]); \
-}
-
-/*
- * Now for the data we need to maintain per-drive:  ide_drive_t
- */
-
-#define ide_scsi	0x21
-#define ide_disk	0x20
-#define ide_optical	0x7
-#define ide_cdrom	0x5
-#define ide_tape	0x1
-#define ide_floppy	0x0
-
-typedef union {
-	unsigned all			: 8;	/* all of the bits together */
-	struct {
-		unsigned set_geometry	: 1;	/* respecify drive geometry */
-		unsigned recalibrate	: 1;	/* seek to cyl 0      */
-		unsigned set_multmode	: 1;	/* set multmode count */
-		unsigned set_tune	: 1;	/* tune interface for drive */
-		unsigned reserved	: 4;	/* unused */
-		} b;
-	} special_t;
-
-typedef struct ide_drive_s {
-	struct request		*queue;	/* request queue */
-	struct ide_drive_s 	*next;	/* circular list of hwgroup drives */
-	unsigned long sleep;		/* sleep until this time */
-	unsigned long service_start;	/* time we started last request */
-	unsigned long service_time;	/* service time of last request */
-	special_t	special;	/* special action flags */
-	byte     keep_settings;		/* restore settings after drive reset */
-	byte     using_dma;		/* disk is using dma for read/write */
-	byte     waiting_for_dma;	/* dma currently in progress */
-	byte     unmask;		/* flag: okay to unmask other irqs */
-	byte     slow;			/* flag: slow data port */
-	byte     bswap;			/* flag: byte swap data */
-	byte     dsc_overlap;		/* flag: DSC overlap */
-	byte     nice1;			/* flag: give potential excess bandwidth */
-	unsigned present	: 1;	/* drive is physically present */
-	unsigned noprobe 	: 1;	/* from:  hdx=noprobe */
-	unsigned busy		: 1;	/* currently doing revalidate_disk() */
-	unsigned removable	: 1;	/* 1 if need to do check_media_change */
-	unsigned forced_geom	: 1;	/* 1 if hdx=c,h,s was given at boot */
-	unsigned no_unmask	: 1;	/* disallow setting unmask bit */
-	unsigned no_io_32bit	: 1;	/* disallow enabling 32bit I/O */
-	unsigned nobios		: 1;	/* flag: do not probe bios for drive */
-	unsigned revalidate	: 1;	/* request revalidation */
-	unsigned atapi_overlap	: 1;	/* flag: ATAPI overlap (not supported) */
-	unsigned nice0		: 1;	/* flag: give obvious excess bandwidth */
-	unsigned nice2		: 1;	/* flag: give a share in our own bandwidth */
-	unsigned doorlocking	: 1;	/* flag: for removable only: door lock/unlock works */
-	unsigned autotune	: 2;	/* 1=autotune, 2=noautotune, 0=default */
-#if FAKE_FDISK_FOR_EZDRIVE
-	unsigned remap_0_to_1	: 1;	/* flag: partitioned with ezdrive */
-#endif /* FAKE_FDISK_FOR_EZDRIVE */
-	byte		media;		/* disk, cdrom, tape, floppy, ... */
-	select_t	select;		/* basic drive/head select reg value */
-	byte		ctl;		/* "normal" value for IDE_CONTROL_REG */
-	byte		ready_stat;	/* min status value for drive ready */
-	byte		mult_count;	/* current multiple sector setting */
-	byte 		mult_req;	/* requested multiple sector setting */
-	byte 		tune_req;	/* requested drive tuning setting */
-	byte		io_32bit;	/* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
-	byte		bad_wstat;	/* used for ignoring WRERR_STAT */
-	byte		nowerr;		/* used for ignoring WRERR_STAT */
-	byte		sect0;		/* offset of first sector for DM6:DDO */
-	byte 		usage;		/* current "open()" count for drive */
-	byte 		head;		/* "real" number of heads */
-	byte		sect;		/* "real" sectors per track */
-	byte		bios_head;	/* BIOS/fdisk/LILO number of heads */
-	byte		bios_sect;	/* BIOS/fdisk/LILO sectors per track */
-	unsigned short	bios_cyl;	/* BIOS/fdisk/LILO number of cyls */
-	unsigned short	cyl;		/* "real" number of cyls */
-	unsigned int	drive_data;	/* for use by tuneproc/selectproc as needed */
-	void		  *hwif;	/* actually (ide_hwif_t *) */
-	struct wait_queue *wqueue;	/* used to wait for drive in open() */
-	struct hd_driveid *id;		/* drive model identification info */
-	struct hd_struct  *part;	/* drive partition table */
-	char		name[4];	/* drive name, such as "hda" */
-	void 		*driver;	/* (ide_driver_t *) */
-	void		*driver_data;	/* extra driver data */
-	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
-	void		*settings;	/* /proc/ide/ drive settings */
-	char		driver_req[10];	/* requests specific driver */
-	} ide_drive_t;
-
-/*
- * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
- *
- * The caller is assumed to have selected the drive and programmed the drive's
- * sector address using CHS or LBA.  All that remains is to prepare for DMA
- * and then issue the actual read/write DMA/PIO command to the drive.
- *
- * Returns 0 if all went well.
- * Returns 1 if DMA read/write could not be started, in which case the caller
- * should either try again later, or revert to PIO for the current request.
- */
-typedef enum {	ide_dma_read,	ide_dma_write,	ide_dma_begin,	ide_dma_end,
-		ide_dma_check,	ide_dma_on,	ide_dma_off,	ide_dma_off_quietly,
-		ide_dma_test_irq
-	} ide_dma_action_t;
-
-typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *);
-
-
-/*
- * An ide_tuneproc_t() is used to set the speed of an IDE interface
- * to a particular PIO mode.  The "byte" parameter is used
- * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255
- * indicates that the interface driver should "auto-tune" the PIO mode
- * according to the drive capabilities in drive->id;
- *
- * Not all interface types support tuning, and not all of those
- * support all possible PIO settings.  They may silently ignore
- * or round values as they see fit.
- */
-typedef void (ide_tuneproc_t)(ide_drive_t *, byte);
-
-/*
- * This is used to provide support for strange interfaces
- */
-typedef void (ide_selectproc_t) (ide_drive_t *);
-
-/*
- * hwif_chipset_t is used to keep track of the specific hardware
- * chipset used by each IDE interface, if known.
- */
-typedef enum {	ide_unknown,	ide_generic,	ide_pci,
-		ide_cmd640,	ide_dtc2278,	ide_ali14xx,
-		ide_qd6580,	ide_umc8672,	ide_ht6560b,
-		ide_pdc4030,	ide_rz1000,	ide_trm290,
-		ide_cmd646,	ide_4drives
-	} hwif_chipset_t;
-
-typedef struct ide_pci_devid_s {
-	unsigned short	vid;
-	unsigned short	did;
-} ide_pci_devid_t;
-
-#define IDE_PCI_DEVID_NULL	((ide_pci_devid_t){0,0})
-#define IDE_PCI_DEVID_EQ(a,b)	(a.vid == b.vid && a.did == b.did)
-
-typedef struct hwif_s {
-	struct hwif_s	*next;		/* for linked-list in ide_hwgroup_t */
-	void		*hwgroup;	/* actually (ide_hwgroup_t *) */
-	ide_ioreg_t	io_ports[IDE_NR_PORTS];	/* task file registers */
-	ide_drive_t	drives[MAX_DRIVES];	/* drive info */
-	struct gendisk	*gd;		/* gendisk structure */
-	ide_tuneproc_t	*tuneproc;	/* routine to tune PIO mode for drives */
-	ide_selectproc_t *selectproc;	/* tweaks hardware to select drive */
-	ide_dmaproc_t	*dmaproc;	/* dma read/write/abort routine */
-	unsigned long	*dmatable;	/* dma physical region descriptor table */
-	struct hwif_s	*mate;		/* other hwif from same PCI chip */
-	unsigned long	dma_base;	/* base addr for dma ports */
-	unsigned	dma_extra;	/* extra addr for dma ports */
-	unsigned long	config_data;	/* for use by chipset-specific code */
-	unsigned long	select_data;	/* for use by chipset-specific code */
-	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
-	int		irq;		/* our irq number */
-	byte		major;		/* our major number */
-	char 		name[6];	/* name of interface, eg. "ide0" */
-	byte		index;		/* 0 for ide0; 1 for ide1; ... */
-	hwif_chipset_t	chipset;	/* sub-module for tuning.. */
-	unsigned	noprobe    : 1;	/* don't probe for this interface */
-	unsigned	present    : 1;	/* this interface exists */
-	unsigned	serialized : 1;	/* serialized operation with mate hwif */
-	unsigned	sharing_irq: 1;	/* 1 = sharing irq with another hwif */
-	unsigned	reset      : 1;	/* reset after probe */
-	unsigned	autodma    : 1;	/* automatically try to enable DMA at boot */
-	byte		channel;	/* for dual-port chips: 0=primary, 1=secondary */
-	struct pci_dev	*pci_dev;	/* for pci chipsets */
-	ide_pci_devid_t	pci_devid;	/* for pci chipsets: {VID,DID} */
-#if (DISK_RECOVERY_TIME > 0)
-	unsigned long	last_time;	/* time when previous rq was done */
-#endif
-	} ide_hwif_t;
-
-/*
- *  internal ide interrupt handler type
- */
-typedef void (ide_handler_t)(ide_drive_t *);
-
-typedef struct hwgroup_s {
-	spinlock_t		spinlock; /* protects "busy" and "handler" */
-	ide_handler_t		*handler;/* irq handler, if active */
-	int			busy;	/* BOOL: protects all fields below */
-	ide_drive_t		*drive;	/* current drive */
-	ide_hwif_t		*hwif;	/* ptr to current hwif in linked-list */
-	struct request		*rq;	/* current request */
-	struct timer_list	timer;	/* failsafe timer */
-	struct request		wrq;	/* local copy of current write rq */
-	unsigned long		poll_timeout;	/* timeout value during long polls */
-	} ide_hwgroup_t;
-
-/*
- * configurable drive settings
- */
-
-#define TYPE_INT	0
-#define TYPE_INTA	1
-#define TYPE_BYTE	2
-#define TYPE_SHORT	3
-
-#define SETTING_READ	(1 << 0)
-#define SETTING_WRITE	(1 << 1)
-#define SETTING_RW	(SETTING_READ | SETTING_WRITE)
-
-typedef int (ide_procset_t)(ide_drive_t *, int);
-typedef struct ide_settings_s {
-	char			*name;
-	int			rw;
-	int			read_ioctl;
-	int			write_ioctl;
-	int			data_type;
-	int			min;
-	int			max;
-	int			mul_factor;
-	int			div_factor;
-	void			*data;
-	ide_procset_t		*set;
-	int			auto_remove;
-	struct ide_settings_s	*next;
-} ide_settings_t;
-
-void ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set);
-void ide_remove_setting(ide_drive_t *drive, char *name);
-ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
-int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
-int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
-void ide_add_generic_settings(ide_drive_t *drive);
-
-/*
- * /proc/ide interface
- */
-typedef struct {
-	const char	*name;
-	mode_t		mode;
-	read_proc_t	*read_proc;
-	write_proc_t	*write_proc;
-} ide_proc_entry_t;
-
-#ifdef CONFIG_PROC_FS
-void proc_ide_create(void);
-void proc_ide_destroy(void);
-void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data);
-void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p);
-read_proc_t proc_ide_read_capacity;
-read_proc_t proc_ide_read_geometry;
-
-/*
- * Standard exit stuff:
- */
-#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
-{					\
-	len -= off;			\
-	if (len < count) {		\
-		*eof = 1;		\
-		if (len <= 0)		\
-			return 0;	\
-	} else				\
-		len = count;		\
-	*start = page + off;		\
-	return len;			\
-}
-#else
-#define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
-#endif
-
-/*
- * Subdrivers support.
- */
-#define IDE_SUBDRIVER_VERSION	1
-
-typedef int	(ide_cleanup_proc)(ide_drive_t *);
-typedef void 	(ide_do_request_proc)(ide_drive_t *, struct request *, unsigned long);
-typedef void	(ide_end_request_proc)(byte, ide_hwgroup_t *);
-typedef int 	(ide_ioctl_proc)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
-typedef int	(ide_open_proc)(struct inode *, struct file *, ide_drive_t *);
-typedef void 	(ide_release_proc)(struct inode *, struct file *, ide_drive_t *);
-typedef int	(ide_check_media_change_proc)(ide_drive_t *);
-typedef void	(ide_pre_reset_proc)(ide_drive_t *);
-typedef unsigned long (ide_capacity_proc)(ide_drive_t *);
-typedef void	(ide_special_proc)(ide_drive_t *);
-typedef void	(ide_setting_proc)(ide_drive_t *);
-
-typedef struct ide_driver_s {
-	const char			*name;
-	const char			*version;
-	byte				media;
-	unsigned busy			: 1;
-	unsigned supports_dma		: 1;
-	unsigned supports_dsc_overlap	: 1;
-	ide_cleanup_proc		*cleanup;
-	ide_do_request_proc		*do_request;
-	ide_end_request_proc		*end_request;
-	ide_ioctl_proc			*ioctl;
-	ide_open_proc			*open;
-	ide_release_proc		*release;
-	ide_check_media_change_proc	*media_change;
-	ide_pre_reset_proc		*pre_reset;
-	ide_capacity_proc		*capacity;
-	ide_special_proc		*special;
-	ide_proc_entry_t		*proc;
-	} ide_driver_t;
-
-#define DRIVER(drive)		((ide_driver_t *)((drive)->driver))
-
-/*
- * IDE modules.
- */
-#define IDE_CHIPSET_MODULE		0	/* not supported yet */
-#define IDE_PROBE_MODULE		1
-#define IDE_DRIVER_MODULE		2
-
-typedef int	(ide_module_init_proc)(void);
-
-typedef struct ide_module_s {
-	int				type;
-	ide_module_init_proc		*init;
-	void				*info;
-	struct ide_module_s		*next;
-} ide_module_t;
-
-/*
- * ide_hwifs[] is the master data structure used to keep track
- * of just about everything in ide.c.  Whenever possible, routines
- * should be using pointers to a drive (ide_drive_t *) or
- * pointers to a hwif (ide_hwif_t *), rather than indexing this
- * structure directly (the allocation/layout may change!).
- *
- */
-#ifndef _IDE_C
-extern	ide_hwif_t	ide_hwifs[];		/* master data repository */
-extern  ide_module_t	*ide_modules;
-#endif
-
-/*
- * We need blk.h, but we replace its end_request by our own version.
- */
-#define IDE_DRIVER		/* Toggle some magic bits in blk.h */
-#define LOCAL_END_REQUEST	/* Don't generate end_request in blk.h */
-#include <linux/blk.h>
-
-void ide_end_request(byte uptodate, ide_hwgroup_t *hwgroup);
-
-/*
- * This is used for (nearly) all data transfers from/to the IDE interface
- */
-void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
-void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
-
-/*
- * This is used for (nearly) all ATAPI data transfers from/to the IDE interface
- */
-void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount);
-void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount);
-
-/*
- * This is used on exit from the driver, to designate the next irq handler
- * and also to start the safety timer.
- */
-void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout);
-
-/*
- * Error reporting, in human readable form (luxurious, but a memory hog).
- */
-byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat);
-
-/*
- * ide_error() takes action based on the error returned by the controller.
- * The calling function must return afterwards, to restart the request.
- */
-void ide_error (ide_drive_t *drive, const char *msg, byte stat);
-
-/*
- * Issue a simple drive command
- * The drive must be selected beforehand.
- */
-void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler);
-
-/*
- * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
- * removing leading/trailing blanks and compressing internal blanks.
- * It is primarily used to tidy up the model name/number fields as
- * returned by the WIN_[P]IDENTIFY commands.
- */
-void ide_fixstring (byte *s, const int bytecount, const int byteswap);
-
-/*
- * This routine busy-waits for the drive status to be not "busy".
- * It then checks the status for all of the "good" bits and none
- * of the "bad" bits, and if all is okay it returns 0.  All other
- * cases return 1 after invoking ide_error() -- caller should return.
- *
- */
-int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout);
-
-/*
- * This routine is called from the partition-table code in genhd.c
- * to "convert" a drive to a logical geometry with fewer than 1024 cyls.
- *
- * The second parameter, "xparm", determines exactly how the translation
- * will be handled:
- *		 0 = convert to CHS with fewer than 1024 cyls
- *			using the same method as Ontrack DiskManager.
- *		 1 = same as "0", plus offset everything by 63 sectors.
- *		-1 = similar to "0", plus redirect sector 0 to sector 1.
- *		>1 = convert to a CHS geometry with "xparm" heads.
- *
- * Returns 0 if the translation was not possible, if the device was not
- * an IDE disk drive, or if a geometry was "forced" on the commandline.
- * Returns 1 if the geometry translation was successful.
- */
-int ide_xlate_1024 (kdev_t, int, const char *);
-
-/*
- * Start a reset operation for an IDE interface.
- * The caller should return immediately after invoking this.
- */
-void ide_do_reset (ide_drive_t *);
-
-/*
- * This function is intended to be used prior to invoking ide_do_drive_cmd().
- */
-void ide_init_drive_cmd (struct request *rq);
-
-/*
- * "action" parameter type for ide_do_drive_cmd() below.
- */
-typedef enum
-	{ide_wait,	/* insert rq at end of list, and wait for it */
-	 ide_next,	/* insert rq immediately after current request */
-	 ide_preempt,	/* insert rq in front of current request */
-	 ide_end}	/* insert rq at end of list, but don't wait for it */
- ide_action_t;
-
-/*
- * This function issues a special IDE device request
- * onto the request queue.
- *
- * If action is ide_wait, then the rq is queued at the end of the
- * request queue, and the function sleeps until it has been processed.
- * This is for use when invoked from an ioctl handler.
- *
- * If action is ide_preempt, then the rq is queued at the head of
- * the request queue, displacing the currently-being-processed
- * request and this function returns immediately without waiting
- * for the new rq to be completed.  This is VERY DANGEROUS, and is
- * intended for careful use by the ATAPI tape/cdrom driver code.
- *
- * If action is ide_next, then the rq is queued immediately after
- * the currently-being-processed-request (if any), and the function
- * returns without waiting for the new rq to be completed.  As above,
- * This is VERY DANGEROUS, and is intended for careful use by the
- * ATAPI tape/cdrom driver code.
- *
- * If action is ide_end, then the rq is queued at the end of the
- * request queue, and the function returns immediately without waiting
- * for the new rq to be completed. This is again intended for careful
- * use by the ATAPI tape/cdrom driver code.
- */
-int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action);
-
-/*
- * Clean up after success/failure of an explicit drive cmd.
- * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
- */
-void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err);
-
-/*
- * Issue ATA command and wait for completion.
- */
-int ide_wait_cmd (ide_drive_t *drive, int cmd, int nsect, int feature, int sectors, byte *buf);
-
-/*
- * ide_system_bus_speed() returns what we think is the system VESA/PCI
- * bus speed (in MHz).  This is used for calculating interface PIO timings.
- * The default is 40 for known PCI systems, 50 otherwise.
- * The "idebus=xx" parameter can be used to override this value.
- */
-int ide_system_bus_speed (void);
-
-/*
- * ide_multwrite() transfers a block of up to mcount sectors of data
- * to a drive as part of a disk multwrite operation.
- */
-void ide_multwrite (ide_drive_t *drive, unsigned int mcount);
-
-/*
- * ide_stall_queue() can be used by a drive to give excess bandwidth back
- * to the hwgroup by sleeping for timeout jiffies.
- */
-void ide_stall_queue (ide_drive_t *drive, unsigned long timeout);
-
-/*
- * ide_get_queue() returns the queue which corresponds to a given device.
- */
-struct request **ide_get_queue (kdev_t dev);
-
-/*
- * CompactFlash cards and their brethern pretend to be removable hard disks,
- * but they never have a slave unit, and they don't have doorlock mechanisms.
- * This test catches them, and is invoked elsewhere when setting appropriate config bits.
- */
-int drive_is_flashcard (ide_drive_t *drive);
-
-int  ide_spin_wait_hwgroup(ide_drive_t *drive, unsigned long *flags);
-void ide_timer_expiry (unsigned long data);
-void ide_intr (int irq, void *dev_id, struct pt_regs *regs);
-void ide_geninit (struct gendisk *gd);
-void do_ide0_request (void);
-#if MAX_HWIFS > 1
-void do_ide1_request (void);
-#endif
-#if MAX_HWIFS > 2
-void do_ide2_request (void);
-#endif
-#if MAX_HWIFS > 3
-void do_ide3_request (void);
-#endif
-#if MAX_HWIFS > 4
-void do_ide4_request (void);
-#endif
-#if MAX_HWIFS > 5
-void do_ide5_request (void);
-#endif
-void ide_init_subdrivers (void);
-
-#ifndef _IDE_C
-extern struct file_operations ide_fops[];
-#endif
-
-#ifdef _IDE_C
-#ifdef CONFIG_BLK_DEV_IDE
-int ideprobe_init (void);
-#endif /* CONFIG_BLK_DEV_IDE */
-#ifdef CONFIG_BLK_DEV_IDEDISK
-int idedisk_init (void);
-#endif /* CONFIG_BLK_DEV_IDEDISK */
-#ifdef CONFIG_BLK_DEV_IDECD
-int ide_cdrom_init (void);
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
-int idetape_init (void);
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-#ifdef CONFIG_BLK_DEV_IDEFLOPPY
-int idefloppy_init (void);
-#endif /* CONFIG_BLK_DEV_IDEFLOPPY */
-#ifdef CONFIG_BLK_DEV_IDESCSI
-int idescsi_init (void);
-#endif /* CONFIG_BLK_DEV_IDESCSI */
-#endif /* _IDE_C */
-
-int ide_register_module (ide_module_t *module);
-void ide_unregister_module (ide_module_t *module);
-ide_drive_t *ide_scan_devices (byte media, const char *name, ide_driver_t *driver, int n);
-int ide_register_subdriver (ide_drive_t *drive, ide_driver_t *driver, int version);
-int ide_unregister_subdriver (ide_drive_t *drive);
-int ide_replace_subdriver(ide_drive_t *drive, const char *driver);
-
-#ifdef CONFIG_BLK_DEV_IDEPCI
-#define ON_BOARD		1
-#define NEVER_BOARD		0
-#ifdef CONFIG_BLK_DEV_OFFBOARD
-#  define OFF_BOARD		ON_BOARD
-#else /* CONFIG_BLK_DEV_OFFBOARD */
-#  define OFF_BOARD		NEVER_BOARD
-#endif /* CONFIG_BLK_DEV_OFFBOARD */
-
-unsigned long ide_find_free_region (unsigned short size) __init;
-void ide_scan_pcibus (void) __init;
-#endif
-#ifdef CONFIG_BLK_DEV_IDEDMA
-#define BAD_DMA_DRIVE		0
-#define GOOD_DMA_DRIVE		1
-int ide_build_dmatable (ide_drive_t *drive);
-void ide_dma_intr  (ide_drive_t *drive);
-int check_drive_lists (ide_drive_t *drive, int good_bad);
-int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive);
-int ide_release_dma (ide_hwif_t *hwif);
-void ide_setup_dma (ide_hwif_t *hwif, unsigned long dmabase, unsigned int num_ports) __init;
-unsigned long ide_get_or_set_dma_base (ide_hwif_t *hwif, int extra, const char *name) __init;
-#endif
-
-#ifdef CONFIG_BLK_DEV_PDC4030
-#include "pdc4030.h"
-#define IS_PDC4030_DRIVE (HWIF(drive)->chipset == ide_pdc4030)
-#else
-#define IS_PDC4030_DRIVE (0)	/* auto-NULLs out pdc4030 code */
-#endif /* CONFIG_BLK_DEV_PDC4030 */
-
-#endif /* _IDE_H */
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)