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authorThomas Bushnell <thomas@gnu.org>1999-04-26 05:35:47 +0000
committerThomas Bushnell <thomas@gnu.org>1999-04-26 05:35:47 +0000
commit3a4e8f5c1c60f87e1c9e0878ddb6cf7dac8c59c0 (patch)
tree50b56b8570e175dbcff43b5f0d61103b6fea5906 /i386/i386at/gpl/linux/block/ide.h
parent002b9c7d51f7fdb0fe222d4a6023655687c6e501 (diff)
1998-11-06 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
* i386/i386at/gpl/linux: Moved to ... * linuxdev: ... here. * i386/Makefrag: Linux drivers specific code moved to ... * linuxdev/Makefrag: ... here. * i386/Files: Recreated. * i386/Subdirs: Likewise. * linuxdev/drivers: New directory. * linuxdev/arch: Likewise. * linuxdev/arch/i386: Likewise. * linuxdev/{block,scsi,net,pci}: Moved to ... * linuxdev/drivers/{block,scsi,net,pci}: ... here. * i386/{Drivers.in,device-drivers.h.in,driverlist.in}: Moved to ... * linuxdev/{Drivers.in,device-drivers.h.in,driverlist.in}: ... here. * linuxdev/{linux_emul.h,linux_*.c}: Moved to ... * linuxdev/arch/i386/{linux_emul.h,linux_*.c}: ... here. * linuxdev/arch/i386/linux_block.c: Include <linux_emul.h>, instead of <i386at/gpl/linux/linux_emul.h>. * linuxdev/arch/i386/linux_init.c: Likewise. * linuxdev/arch/i386/linux_kmem.c: Likewise. * linuxdev/arch/i386/linux_misc.c: Likewise. * linuxdev/arch/i386/linux_net.c: Likewise. * linuxdev/arch/i386/linux_sched.c: Likewise. * device/ds_routines.c: Include <linuxdev/device-drivers.h>, instead of <i386/device-drivers.h>. * linuxdev/arch/i386/linux_init.c: Likewise. * linuxdev/include/linux/autoconf.h: Likewise. * Makefile.in: Include $(srcdir)/linuxdev/Makefrag. * linuxdev/Drivers.in (AC_INIT): Use include/linux/autoconf.h, instead of i386/i386asm.sym.
Diffstat (limited to 'i386/i386at/gpl/linux/block/ide.h')
-rw-r--r--i386/i386at/gpl/linux/block/ide.h655
1 files changed, 0 insertions, 655 deletions
diff --git a/i386/i386at/gpl/linux/block/ide.h b/i386/i386at/gpl/linux/block/ide.h
deleted file mode 100644
index b1ebc4c..0000000
--- a/i386/i386at/gpl/linux/block/ide.h
+++ /dev/null
@@ -1,655 +0,0 @@
-/*
- * linux/drivers/block/ide.h
- *
- * Copyright (C) 1994, 1995 Linus Torvalds & authors
- */
-
-#include <linux/config.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_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
-
-#if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE)
-#define CONFIG_BLK_DEV_IDEATAPI 1
-#endif
-
-/*
- * 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
-
-/*
- * Definitions for accessing IDE controller registers
- */
-
-#define HWIF(drive) ((ide_hwif_t *)drive->hwif)
-#define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
-
-#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_FEATURE_OFFSET IDE_ERROR_OFFSET
-#define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET
-
-#define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET)
-#define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET)
-#define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET)
-#define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET)
-#define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET)
-#define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET)
-#define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET)
-#define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET)
-#define IDE_CONTROL_REG (HWIF(drive)->ctl_port)
-#define IDE_FEATURE_REG IDE_ERROR_REG
-#define IDE_COMMAND_REG IDE_STATUS_REG
-#define IDE_ALTSTATUS_REG IDE_CONTROL_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 (DRIVE_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 MAX_HWIFS 4 /* an arbitrary, but realistic limit */
-#define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */
-
-/*
- * Timeouts for various operations:
- */
-#define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */
-#define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */
-#define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */
-#define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */
-#define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
-#include "ide-tape.h"
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
-#ifdef CONFIG_BLK_DEV_IDECD
-
-struct atapi_request_sense {
- unsigned char error_code : 7;
- unsigned char valid : 1;
- byte reserved1;
- unsigned char sense_key : 4;
- unsigned char reserved2 : 1;
- unsigned char ili : 1;
- unsigned char reserved3 : 2;
- byte info[4];
- byte sense_len;
- byte command_info[4];
- byte asc;
- byte ascq;
- byte fru;
- byte sense_key_specific[3];
-};
-
-struct packet_command {
- char *buffer;
- int buflen;
- int stat;
- struct atapi_request_sense *sense_data;
- unsigned char c[12];
-};
-
-/* Space to hold the disk TOC. */
-
-#define MAX_TRACKS 99
-struct atapi_toc_header {
- unsigned short toc_length;
- byte first_track;
- byte last_track;
-};
-
-struct atapi_toc_entry {
- byte reserved1;
- unsigned control : 4;
- unsigned adr : 4;
- byte track;
- byte reserved2;
- union {
- unsigned lba;
- struct {
- byte reserved3;
- byte m;
- byte s;
- byte f;
- } msf;
- } addr;
-};
-
-struct atapi_toc {
- int last_session_lba;
- int xa_flag;
- unsigned capacity;
- struct atapi_toc_header hdr;
- struct atapi_toc_entry ent[MAX_TRACKS+1]; /* One extra for the leadout. */
-};
-
-
-/* This structure is annoyingly close to, but not identical with,
- the cdrom_subchnl structure from cdrom.h. */
-struct atapi_cdrom_subchnl
-{
- u_char acdsc_reserved;
- u_char acdsc_audiostatus;
- u_short acdsc_length;
- u_char acdsc_format;
-
- u_char acdsc_adr: 4;
- u_char acdsc_ctrl: 4;
- u_char acdsc_trk;
- u_char acdsc_ind;
- union
- {
- struct
- {
- u_char minute;
- u_char second;
- u_char frame;
- } msf;
- int lba;
- } acdsc_absaddr;
- union
- {
- struct
- {
- u_char minute;
- u_char second;
- u_char frame;
- } msf;
- int lba;
- } acdsc_reladdr;
-};
-
-
-/* Extra per-device info for cdrom drives. */
-struct cdrom_info {
-
- /* Buffer for table of contents. NULL if we haven't allocated
- a TOC buffer for this device yet. */
-
- struct atapi_toc *toc;
-
- /* Sector buffer. If a read request wants only the first part of a cdrom
- block, we cache the rest of the block here, in the expectation that that
- data is going to be wanted soon. SECTOR_BUFFERED is the number of the
- first buffered sector, and NSECTORS_BUFFERED is the number of sectors
- in the buffer. Before the buffer is allocated, we should have
- SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */
-
- unsigned long sector_buffered;
- unsigned long nsectors_buffered;
- char *sector_buffer;
-
- /* The result of the last successful request sense command
- on this device. */
- struct atapi_request_sense sense_data;
-};
-
-#endif /* CONFIG_BLK_DEV_IDECD */
-
-/*
- * Now for the data we need to maintain per-drive: ide_drive_t
- */
-
-typedef enum {ide_disk, ide_cdrom, ide_tape} ide_media_t;
-
-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_pio : 1; /* set pio mode */
- unsigned reserved : 4; /* unused */
- } b;
- } special_t;
-
-typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- unsigned head : 4; /* always zeros here */
- unsigned unit : 1; /* drive select number, 0 or 1 */
- unsigned bit5 : 1; /* always 1 */
- unsigned lba : 1; /* using LBA instead of CHS */
- unsigned bit7 : 1; /* always 1 */
- } b;
- } select_t;
-
-typedef struct ide_drive_s {
- special_t special; /* special action flags */
- unsigned present : 1; /* drive is physically present */
- unsigned noprobe : 1; /* from: hdx=noprobe */
- unsigned keep_settings : 1; /* restore settings after drive reset */
- unsigned busy : 1; /* currently doing revalidate_disk() */
- unsigned removeable : 1; /* 1 if need to do check_media_change */
- unsigned using_dma : 1; /* disk is using dma for read/write */
- unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
- unsigned unmask : 1; /* flag: okay to unmask other irqs */
- 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 */
- ide_media_t media; /* disk, cdrom, tape */
- 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 pio_req; /* requested multiple sector setting */
- byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
- byte bad_wstat; /* 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 */
- 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" */
-#ifdef CONFIG_BLK_DEV_IDECD
- struct cdrom_info cdrom_info; /* for ide-cd.c */
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- idetape_tape_t tape; /* for ide-tape.c */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
- } 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 = 0, ide_dma_write = 1,
- ide_dma_abort = 2, ide_dma_check = 3,
- ide_dma_status_bad = 4, ide_dma_transferred = 5,
- ide_dma_begin = 6 }
- 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 HT6560B interface support.
- * It will probably also be used by the DC4030VL driver.
- */
-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_triton,
- ide_cmd640, ide_dtc2278, ide_ali14xx,
- ide_qd6580, ide_umc8672, ide_ht6560b }
- hwif_chipset_t;
-
-typedef struct hwif_s {
- struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
- void *hwgroup; /* actually (ide_hwgroup_t *) */
- unsigned short io_base; /* base io port addr */
- unsigned short ctl_port; /* usually io_base+0x206 */
- ide_drive_t drives[MAX_DRIVES]; /* drive info */
- struct gendisk *gd; /* gendisk structure */
- ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */
-#ifdef CONFIG_BLK_DEV_HT6560B
- ide_selectproc_t *selectproc; /* tweaks hardware to select drive */
-#endif /* CONFIG_BLK_DEV_HT6560B */
- ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */
- unsigned long *dmatable; /* dma physical region descriptor table */
- unsigned short dma_base; /* base addr for dma ports (triton) */
- byte irq; /* our irq number */
- byte major; /* our major number */
- char name[5]; /* 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; /* valid only for ide_hwifs[0] */
- unsigned no_unmask : 1; /* disallow setting unmask bits */
-#if (DISK_RECOVERY_TIME > 0)
- unsigned long last_time; /* time when previous rq was done */
-#endif
-#ifdef CONFIG_BLK_DEV_IDECD
- struct request request_sense_request; /* from ide-cd.c */
- struct packet_command request_sense_pc; /* from ide-cd.c */
-#endif /* CONFIG_BLK_DEV_IDECD */
-#ifdef CONFIG_BLK_DEV_IDETAPE
- ide_drive_t *tape_drive; /* Pointer to the tape on this interface */
-#endif /* CONFIG_BLK_DEV_IDETAPE */
- } ide_hwif_t;
-
-/*
- * internal ide interrupt handler type
- */
-typedef void (ide_handler_t)(ide_drive_t *);
-
-typedef struct hwgroup_s {
- ide_handler_t *handler;/* irq handler, if active */
- 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;
-
-/*
- * 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!).
- */
-#ifdef _IDE_C
- ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */
-#else
-extern ide_hwif_t ide_hwifs[];
-#endif
-
-/*
- * One final include file, which references some of the data/defns from above
- */
-#define IDE_DRIVER /* "parameter" for blk.h */
-#include <linux/blk.h>
-
-#if (DISK_RECOVERY_TIME > 0)
-void ide_set_recovery_timer (ide_hwif_t *);
-#define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive)
-#else
-#define SET_RECOVERY_TIMER(drive)
-#endif
-
-/*
- * This is used for (nearly) all data transfers from the IDE interface
- */
-void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
-
-/*
- * This is used for (nearly) all data transfers to the IDE interface
- */
-void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
-
-/*
- * 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);
-
-/*
- * 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 then 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. (Currently used by ide-tape.c,
- * when operating in the pipelined operation mode).
- */
-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);
-
-#ifdef CONFIG_BLK_DEV_IDECD
-/*
- * These are routines in ide-cd.c invoked from ide.c
- */
-void ide_do_rw_cdrom (ide_drive_t *, unsigned long);
-int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
-int ide_cdrom_check_media_change (ide_drive_t *);
-int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *);
-void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *);
-void ide_cdrom_setup (ide_drive_t *);
-#endif /* CONFIG_BLK_DEV_IDECD */
-
-#ifdef CONFIG_BLK_DEV_IDETAPE
-
-/*
- * Functions in ide-tape.c which are invoked from ide.c:
- */
-
-/*
- * idetape_identify_device is called during device probing stage to
- * probe for an ide atapi tape drive and to initialize global variables
- * in ide-tape.c which provide the link between the character device
- * and the correspoding block device.
- *
- * Returns 1 if an ide tape was detected and is supported.
- * Returns 0 otherwise.
- */
-
-int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id);
-
-/*
- * idetape_setup is called a bit later than idetape_identify_device,
- * during the search for disk partitions, to initialize various tape
- * state variables in ide_drive_t *drive.
- */
-
-void idetape_setup (ide_drive_t *drive);
-
-/*
- * idetape_do_request is our request function. It is called by ide.c
- * to process a new request.
- */
-
-void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block);
-
-/*
- * idetape_end_request is used to finish servicing a request, and to
- * insert a pending pipeline request into the main device queue.
- */
-
-void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup);
-
-/*
- * Block device interface functions.
- */
-
-int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
-int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive);
-void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive);
-
-/*
- * idetape_register_chrdev initializes the character device interface to
- * the ide tape drive.
- */
-
-void idetape_register_chrdev (void);
-
-#endif /* CONFIG_BLK_DEV_IDETAPE */
-
-#ifdef CONFIG_BLK_DEV_TRITON
-void ide_init_triton (byte, byte);
-#endif /* CONFIG_BLK_DEV_TRITON */