From 86297c41a26f18d924e64fc93321c59cbc4c48dd Mon Sep 17 00:00:00 2001 From: Thomas Bushnell Date: Mon, 26 Apr 1999 05:58:44 +0000 Subject: 1998-11-30 OKUJI Yoshinori Clean up linux emulation code to make it architecture-independent as much as possible. * linux: Renamed from linuxdev. * Makefile.in (objfiles): Add linux.o instead of linuxdev.o. (MAKE): New variable. Used for the linux.o target. * configure.in: Add AC_CHECK_TOOL(MAKE, make). * i386/i386/spl.h: Include , for compatibility with OSF Mach 3.0. Suggested by Elgin Lee . * linux/src: Renamed from linux/linux. * linux/dev: Renamed from linux/mach. * linux/Drivers.in (AC_INIT): Use dev/include/linux/autoconf.h, instead of mach/include/linux/autoconf.h. * Makefile.in (all): Target ../linux.o instead of ../linuxdev.o. * linux/dev/drivers/block/genhd.c: Include instead of . * linux/dev/drivers/net/auto_irq.c: Remove unneeded header files, and . * linux/dev/init/main.c: Many i386-dependent codes moved to ... * linux/dev/arch/i386/irq.c: ... here. * linux/dev/arch/i386/setup.c: New file. * linux/dev/arch/i386/linux_emul.h: Likewise. * linux/dev/arch/i386/glue/timer.c: Merged into sched.c. * linux/dev/arch/i386/glue/sched.c: Include instead of , and moved to ... * linux/dev/kernel/sched.c: ... here. * linux/dev/arch/i386/glue/block.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/blocl.c: ... here. * linux/dev/arch/i386/glue/net.c: Include and , instead of i386-dependent header files, and moved to ... * linux/dev/glue/net.c: ... here. * linux/dev/arch/i386/glue/misc.c: Remove `x86' and moved to ... * linux/dev/glue/misc.c: ... here. * linux/dev/arch/i386/glue/kmem.c: Moved to ... * linux/dev/glue/kmem.c: ... here. --- linux/src/drivers/block/ide.h | 747 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 747 insertions(+) create mode 100644 linux/src/drivers/block/ide.h (limited to 'linux/src/drivers/block/ide.h') diff --git a/linux/src/drivers/block/ide.h b/linux/src/drivers/block/ide.h new file mode 100644 index 0000000..5310ac8 --- /dev/null +++ b/linux/src/drivers/block/ide.h @@ -0,0 +1,747 @@ +/* + * linux/drivers/block/ide.h + * + * Copyright (C) 1994, 1995 Linus Torvalds & authors + */ + +#include + +/* + * 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 */ + +#if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE) || \ + defined(CONFIG_BLK_DEV_IDEFLOPPY) || defined(CONFIG_BLK_DEV_IDESCSI) +#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 :) + *****************************************************************************/ + +#if defined(CONFIG_BLK_DEV_IDESCSI) && !defined(CONFIG_SCSI) +#error "SCSI must also be selected" +#endif + +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 +#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<selectproc) \ + hwif->selectproc(drive); \ + else \ + OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); \ +} +#else +#define SELECT_DRIVE(hwif,drive) OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); +#endif /* CONFIG_BLK_DEV_HT6560B || CONFIG_BLK_DEV_PROMISE */ + +#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]; +}; + + +/* Structure of a MSF cdrom address. */ +struct atapi_msf { + byte reserved; + byte minute; + byte second; + byte frame; +}; + + +/* 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 atapi_msf 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 atapi_msf msf; + int lba; + } acdsc_absaddr; + union { + struct atapi_msf 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; + + int max_sectors; +}; + +#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_floppy, ide_scsi} 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_tune : 1; /* tune interface for drive */ + unsigned mc : 1; /* acknowledge media change */ + unsigned reserved : 3; /* 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 removable : 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 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 slow : 1; /* flag: slow data port */ + 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 */ + unsigned no_geom : 1; /* flag: do not set geometry */ + ide_media_t 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 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 */ +#ifdef CONFIG_BLK_DEV_IDEFLOPPY + void *floppy; /* for ide-floppy.c */ +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ +#ifdef CONFIG_BLK_DEV_IDESCSI + void *scsi; /* for ide-scsi.c */ +#endif /* CONFIG_BLK_DEV_IDESCSI */ + byte ide_scsi; /* use ide-scsi 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 = 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 & PROMISE interface support. + */ +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, + ide_promise, ide_promise_udma } + 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 */ +#if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE) + ide_selectproc_t *selectproc; /* tweaks hardware to select drive */ +#endif + 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; /* serialized operation with mate hwif */ + unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */ +#ifdef CONFIG_BLK_DEV_PROMISE + unsigned is_promise2: 1; /* 2nd i/f on promise DC4030 */ +#endif /* CONFIG_BLK_DEV_PROMISE */ +#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 */ + ide_hwif_t *next_hwif; /* next selected hwif (for tape) */ + 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 */ + int active; /* set when servicing requests */ + } 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!). + * + */ +#ifndef _IDE_C +extern ide_hwif_t ide_hwifs[]; /* master data repository */ +#endif + +/* + * One final include file, which references some of the data/defns from above + */ +#define IDE_DRIVER /* "parameter" for blk.h */ +#include + +#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 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); + +/* + * 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. (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); + +/* + * 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); + +#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 corresponding 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_IDEFLOPPY +int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id); +void idefloppy_setup (ide_drive_t *drive); +void idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); +void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup); +int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg); +int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive); +void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive); +int idefloppy_media_change (ide_drive_t *drive); +unsigned long idefloppy_capacity (ide_drive_t *drive); +#endif /* CONFIG_BLK_DEV_IDEFLOPPY */ + +#ifdef CONFIG_BLK_DEV_IDESCSI +void idescsi_setup (ide_drive_t *drive); +void idescsi_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); +void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup); +int idescsi_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); +int idescsi_open (struct inode *inode, struct file *filp, ide_drive_t *drive); +void idescsi_ide_release (struct inode *inode, struct file *filp, ide_drive_t *drive); +#endif /* CONFIG_BLK_DEV_IDESCSI */ + +#ifdef CONFIG_BLK_DEV_TRITON +void ide_init_triton (byte, byte); +void ide_init_promise (byte bus, byte fn, ide_hwif_t *hwif0, ide_hwif_t *hwif1, unsigned short dma); +#endif /* CONFIG_BLK_DEV_TRITON */ -- cgit v1.2.3