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#ifndef _IDE_H
#define _IDE_H
/*
* linux/include/linux/ide.h
*
* Copyright (C) 1994-2002 Linus Torvalds & authors
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/hdreg.h>
#include <linux/hdsmart.h>
#include <linux/blkdev.h>
#include <linux/proc_fs.h>
#include <linux/interrupt.h>
#include <linux/bitops.h>
#include <linux/bio.h>
#include <linux/device.h>
#include <linux/pci.h>
#include <asm/byteorder.h>
#include <asm/system.h>
#include <asm/hdreg.h>
#include <asm/io.h>
#include <asm/semaphore.h>
#define DEBUG_PM
/*
* 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
*/
#define 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 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 */
#ifndef DISABLE_IRQ_NOSYNC
#define DISABLE_IRQ_NOSYNC 0
#endif
/*
* Used to indicate "no IRQ", should be a value that cannot be an IRQ
* number.
*/
#define IDE_NO_IRQ (-1)
/*
* IDE_DRIVE_CMD is used to implement many features of the hdparm utility
*/
#define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
#define IDE_DRIVE_TASK 98
/*
* IDE_DRIVE_TASKFILE is used to implement many features needed for raw tasks
*/
#define IDE_DRIVE_TASKFILE 97
/*
* "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 */
/*
* Tune flags
*/
#define IDE_TUNE_NOAUTO 2
#define IDE_TUNE_AUTO 1
#define IDE_TUNE_DEFAULT 0
/*
* state flags
*/
#define DMA_PIO_RETRY 1 /* retrying in PIO */
/*
* 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_OFFSET_HOB (0)
#define IDE_ERROR_OFFSET_HOB (1)
#define IDE_NSECTOR_OFFSET_HOB (2)
#define IDE_SECTOR_OFFSET_HOB (3)
#define IDE_LCYL_OFFSET_HOB (4)
#define IDE_HCYL_OFFSET_HOB (5)
#define IDE_SELECT_OFFSET_HOB (6)
#define IDE_CONTROL_OFFSET_HOB (7)
#define IDE_FEATURE_OFFSET_HOB IDE_ERROR_OFFSET_HOB
#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_DATA_REG_HOB (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
#define IDE_ERROR_REG_HOB (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
#define IDE_NSECTOR_REG_HOB (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
#define IDE_SECTOR_REG_HOB (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
#define IDE_LCYL_REG_HOB (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
#define IDE_HCYL_REG_HOB (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
#define IDE_SELECT_REG_HOB (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
#define IDE_STATUS_REG_HOB (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
#define IDE_CONTROL_REG_HOB (HWIF(drive)->io_ports[IDE_CONTROL_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
#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)
#define BAD_CRC (ABRT_ERR | ICRC_ERR)
#define SATA_NR_PORTS (3) /* 16 possible ?? */
#define SATA_STATUS_OFFSET (0)
#define SATA_STATUS_REG (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
#define SATA_ERROR_OFFSET (1)
#define SATA_ERROR_REG (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
#define SATA_CONTROL_OFFSET (2)
#define SATA_CONTROL_REG (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
#define SATA_MISC_OFFSET (0)
#define SATA_MISC_REG (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
#define SATA_PHY_OFFSET (1)
#define SATA_PHY_REG (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
#define SATA_IEN_OFFSET (2)
#define SATA_IEN_REG (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
/*
* Our Physical Region Descriptor (PRD) table should be large enough
* to handle the biggest I/O request we are likely to see. Since requests
* can have no more than 256 sectors, and since the typical blocksize is
* two or more sectors, we could get by with a limit of 128 entries here for
* the usual worst case. Most requests seem to include some contiguous blocks,
* further reducing the number of table entries required.
*
* The driver reverts to PIO mode for individual requests that exceed
* this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
* 100% of all crazy scenarios here is not necessary.
*
* As it turns out though, we must allocate a full 4KB page for this,
* so the two PRD tables (ide0 & ide1) will each get half of that,
* allowing each to have about 256 entries (8 bytes each) from this.
*/
#define PRD_BYTES 8
#define PRD_ENTRIES (PAGE_SIZE / (2 * PRD_BYTES))
/*
* Some more useful definitions
*/
#define IDE_MAJOR_NAME "hd" /* 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_SIZE 512
#define SECTOR_WORDS (SECTOR_SIZE / 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 */
#if defined(CONFIG_APM) || defined(CONFIG_APM_MODULE)
#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 || CONFIG_APM_MODULE */
#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 HOST(hwif,chipset) \
{ \
return ((hwif)->chipset == chipset) ? 1 : 0; \
}
/*
* Check for an interrupt and acknowledge the interrupt status
*/
struct hwif_s;
typedef int (ide_ack_intr_t)(struct hwif_s *);
#ifndef NO_DMA
#define NO_DMA 255
#endif
/*
* 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_qd65xx, ide_umc8672, ide_ht6560b,
ide_pdc4030, ide_rz1000, ide_trm290,
ide_cmd646, ide_cy82c693, ide_4drives,
ide_pmac, ide_etrax100, ide_acorn,
ide_pc9800
} hwif_chipset_t;
/*
* Structure to hold all information about the location of this port
*/
typedef struct hw_regs_s {
unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */
int irq; /* our irq number */
int dma; /* our dma entry */
ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
void *priv; /* interface specific data */
hwif_chipset_t chipset;
unsigned long sata_scr[SATA_NR_PORTS];
unsigned long sata_misc[SATA_NR_PORTS];
} hw_regs_t;
/*
* Register new hardware with ide
*/
int ide_register_hw(hw_regs_t *hw, struct hwif_s **hwifp);
/*
* Set up hw_regs_t structure before calling ide_register_hw (optional)
*/
void ide_setup_ports( hw_regs_t *hw,
unsigned long base,
int *offsets,
unsigned long ctrl,
unsigned long intr,
ide_ack_intr_t *ack_intr,
#if 0
ide_io_ops_t *iops,
#endif
int irq);
#include <asm/ide.h>
/* Currently only m68k, apus and m8xx need it */
#ifndef IDE_ARCH_ACK_INTR
# define ide_ack_intr(hwif) (1)
#endif
/* Currently only Atari needs it */
#ifndef IDE_ARCH_LOCK
# define ide_release_lock() do {} while (0)
# define ide_get_lock(hdlr, data) do {} while (0)
#endif /* IDE_ARCH_LOCK */
/*
* 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
/*
* Special Driver Flags
*
* set_geometry : respecify drive geometry
* recalibrate : seek to cyl 0
* set_multmode : set multmode count
* set_tune : tune interface for drive
* serviced : service command
* reserved : unused
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned set_geometry : 1;
unsigned recalibrate : 1;
unsigned set_multmode : 1;
unsigned set_tune : 1;
unsigned serviced : 1;
unsigned reserved : 3;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved : 3;
unsigned serviced : 1;
unsigned set_tune : 1;
unsigned set_multmode : 1;
unsigned recalibrate : 1;
unsigned set_geometry : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} special_t;
/*
* ATA DATA Register Special.
* ATA NSECTOR Count Register().
* ATAPI Byte Count Register.
* Channel index ordering pairs.
*/
typedef union {
unsigned all :16;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned low :8; /* LSB */
unsigned high :8; /* MSB */
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned high :8; /* MSB */
unsigned low :8; /* LSB */
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_nsector_t, ata_data_t, atapi_bcount_t, ata_index_t;
/*
* ATA-IDE Error Register
*
* mark : Bad address mark
* tzero : Couldn't find track 0
* abrt : Aborted Command
* mcr : Media Change Request
* id : ID field not found
* mce : Media Change Event
* ecc : Uncorrectable ECC error
* bdd : dual meaing
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned mark :1;
unsigned tzero :1;
unsigned abrt :1;
unsigned mcr :1;
unsigned id :1;
unsigned mce :1;
unsigned ecc :1;
unsigned bdd :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bdd :1;
unsigned ecc :1;
unsigned mce :1;
unsigned id :1;
unsigned mcr :1;
unsigned abrt :1;
unsigned tzero :1;
unsigned mark :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_error_t;
/*
* ATA-IDE Select Register, aka Device-Head
*
* head : always zeros here
* unit : drive select number: 0/1
* bit5 : always 1
* lba : using LBA instead of CHS
* bit7 : always 1
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned head : 4;
unsigned unit : 1;
unsigned bit5 : 1;
unsigned lba : 1;
unsigned bit7 : 1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bit7 : 1;
unsigned lba : 1;
unsigned bit5 : 1;
unsigned unit : 1;
unsigned head : 4;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} select_t, ata_select_t;
/*
* The ATA-IDE Status Register.
* The ATAPI Status Register.
*
* check : Error occurred
* idx : Index Error
* corr : Correctable error occurred
* drq : Data is request by the device
* dsc : Disk Seek Complete : ata
* : Media access command finished : atapi
* df : Device Fault : ata
* : Reserved : atapi
* drdy : Ready, Command Mode Capable : ata
* : Ignored for ATAPI commands : atapi
* bsy : Disk is Busy
* : The device has access to the command block
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned check :1;
unsigned idx :1;
unsigned corr :1;
unsigned drq :1;
unsigned dsc :1;
unsigned df :1;
unsigned drdy :1;
unsigned bsy :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bsy :1;
unsigned drdy :1;
unsigned df :1;
unsigned dsc :1;
unsigned drq :1;
unsigned corr :1;
unsigned idx :1;
unsigned check :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_status_t, atapi_status_t;
/*
* ATA-IDE Control Register
*
* bit0 : Should be set to zero
* nIEN : device INTRQ to host
* SRST : host soft reset bit
* bit3 : ATA-2 thingy, Should be set to 1
* reserved456 : Reserved
* HOB : 48-bit address ordering, High Ordered Bit
*/
typedef union {
unsigned all : 8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned bit0 : 1;
unsigned nIEN : 1;
unsigned SRST : 1;
unsigned bit3 : 1;
unsigned reserved456 : 3;
unsigned HOB : 1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned HOB : 1;
unsigned reserved456 : 3;
unsigned bit3 : 1;
unsigned SRST : 1;
unsigned nIEN : 1;
unsigned bit0 : 1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} ata_control_t;
/*
* ATAPI Feature Register
*
* dma : Using DMA or PIO
* reserved321 : Reserved
* reserved654 : Reserved (Tag Type)
* reserved7 : Reserved
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned dma :1;
unsigned reserved321 :3;
unsigned reserved654 :3;
unsigned reserved7 :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved7 :1;
unsigned reserved654 :3;
unsigned reserved321 :3;
unsigned dma :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_feature_t;
/*
* ATAPI Interrupt Reason Register.
*
* cod : Information transferred is command (1) or data (0)
* io : The device requests us to read (1) or write (0)
* reserved : Reserved
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned cod :1;
unsigned io :1;
unsigned reserved :6;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned reserved :6;
unsigned io :1;
unsigned cod :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_ireason_t;
/*
* The ATAPI error register.
*
* ili : Illegal Length Indication
* eom : End Of Media Detected
* abrt : Aborted command - As defined by ATA
* mcr : Media Change Requested - As defined by ATA
* sense_key : Sense key of the last failed packet command
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned ili :1;
unsigned eom :1;
unsigned abrt :1;
unsigned mcr :1;
unsigned sense_key :4;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned sense_key :4;
unsigned mcr :1;
unsigned abrt :1;
unsigned eom :1;
unsigned ili :1;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_error_t;
/*
* ATAPI floppy Drive Select Register
*
* sam_lun : Logical unit number
* reserved3 : Reserved
* drv : The responding drive will be drive 0 (0) or drive 1 (1)
* one5 : Should be set to 1
* reserved6 : Reserved
* one7 : Should be set to 1
*/
typedef union {
unsigned all :8;
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
unsigned sam_lun :3;
unsigned reserved3 :1;
unsigned drv :1;
unsigned one5 :1;
unsigned reserved6 :1;
unsigned one7 :1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned one7 :1;
unsigned reserved6 :1;
unsigned one5 :1;
unsigned drv :1;
unsigned reserved3 :1;
unsigned sam_lun :3;
#else
#error "Please fix <asm/byteorder.h>"
#endif
} b;
} atapi_select_t;
/*
* Status returned from various ide_ functions
*/
typedef enum {
ide_stopped, /* no drive operation was started */
ide_started, /* a drive operation was started, handler was set */
ide_released, /* as ide_started, but bus also released */
} ide_startstop_t;
struct ide_driver_s;
struct ide_settings_s;
typedef struct ide_drive_s {
char name[4]; /* drive name, such as "hda" */
char driver_req[10]; /* requests specific driver */
request_queue_t *queue; /* request queue */
struct request *rq; /* current request */
struct ide_drive_s *next; /* circular list of hwgroup drives */
struct ide_driver_s *driver;/* (ide_driver_t *) */
void *driver_data; /* extra driver data */
struct hd_driveid *id; /* drive model identification info */
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
struct ide_settings_s *settings;/* /proc/ide/ drive settings */
char devfs_name[64]; /* devfs crap */
struct hwif_s *hwif; /* actually (ide_hwif_t *) */
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 */
unsigned long timeout; /* max time to wait for irq */
special_t special; /* special action flags */
select_t select; /* basic drive/head select reg value */
u8 keep_settings; /* restore settings after drive reset */
u8 autodma; /* device can safely use dma on host */
u8 using_dma; /* disk is using dma for read/write */
u8 using_tcq; /* disk is using queueing */
u8 retry_pio; /* retrying dma capable host in pio */
u8 state; /* retry state */
u8 waiting_for_dma; /* dma currently in progress */
u8 unmask; /* okay to unmask other irqs */
u8 slow; /* slow data port */
u8 bswap; /* byte swap data */
u8 dsc_overlap; /* DSC overlap */
u8 nice1; /* give potential excess bandwidth */
unsigned present : 1; /* drive is physically present */
unsigned dead : 1; /* device ejected hint */
unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */
unsigned noprobe : 1; /* from: hdx=noprobe */
unsigned removable : 1; /* 1 if need to do check_media_change */
unsigned attach : 1; /* needed for removable devices */
unsigned is_flash : 1; /* 1 if probed as flash */
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; /* do not probe bios for drive */
unsigned atapi_overlap : 1; /* ATAPI overlap (not supported) */
unsigned nice0 : 1; /* give obvious excess bandwidth */
unsigned nice2 : 1; /* give a share in our own bandwidth */
unsigned doorlocking : 1; /* for removable only: door lock/unlock works */
unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */
unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */
unsigned ata_flash : 1; /* 1=present, 0=default */
unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */
unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */
unsigned addressing; /* : 3;
* 0=28-bit
* 1=48-bit
* 2=48-bit doing 28-bit
* 3=64-bit
*/
u8 scsi; /* 0=default, 1=skip current ide-subdriver for ide-scsi emulation */
u8 quirk_list; /* considered quirky, set for a specific host */
u8 suspend_reset; /* drive suspend mode flag, soft-reset recovers */
u8 init_speed; /* transfer rate set at boot */
u8 pio_speed; /* unused by core, used by some drivers for fallback from DMA */
u8 current_speed; /* current transfer rate set */
u8 dn; /* now wide spread use */
u8 wcache; /* status of write cache */
u8 acoustic; /* acoustic management */
u8 media; /* disk, cdrom, tape, floppy, ... */
u8 ctl; /* "normal" value for IDE_CONTROL_REG */
u8 ready_stat; /* min status value for drive ready */
u8 mult_count; /* current multiple sector setting */
u8 mult_req; /* requested multiple sector setting */
u8 tune_req; /* requested drive tuning setting */
u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
u8 bad_wstat; /* used for ignoring WRERR_STAT */
u8 nowerr; /* used for ignoring WRERR_STAT */
u8 sect0; /* offset of first sector for DM6:DDO */
u8 head; /* "real" number of heads */
u8 sect; /* "real" sectors per track */
u8 bios_head; /* BIOS/fdisk/LILO number of heads */
u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */
u8 queue_depth; /* max queue depth */
unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
unsigned int cyl; /* "real" number of cyls */
unsigned int drive_data; /* use by tuneproc/selectproc */
unsigned int usage; /* current "open()" count for drive */
unsigned int failures; /* current failure count */
unsigned int max_failures; /* maximum allowed failure count */
u64 capacity64; /* total number of sectors */
int last_lun; /* last logical unit */
int forced_lun; /* if hdxlun was given at boot */
int lun; /* logical unit */
int crc_count; /* crc counter to reduce drive speed */
struct list_head list;
struct device gendev;
struct semaphore gendev_rel_sem; /* to deal with device release() */
struct gendisk *disk;
} ide_drive_t;
typedef struct ide_pio_ops_s {
void (*ata_input_data)(ide_drive_t *, void *, u32);
void (*ata_output_data)(ide_drive_t *, void *, u32);
void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
} ide_pio_ops_t;
typedef struct ide_dma_ops_s {
/* insert dma operations here! */
int (*ide_dma_read)(ide_drive_t *drive);
int (*ide_dma_write)(ide_drive_t *drive);
int (*ide_dma_begin)(ide_drive_t *drive);
int (*ide_dma_end)(ide_drive_t *drive);
int (*ide_dma_check)(ide_drive_t *drive);
int (*ide_dma_on)(ide_drive_t *drive);
int (*ide_dma_off)(ide_drive_t *drive);
int (*ide_dma_off_quietly)(ide_drive_t *drive);
int (*ide_dma_test_irq)(ide_drive_t *drive);
int (*ide_dma_host_on)(ide_drive_t *drive);
int (*ide_dma_host_off)(ide_drive_t *drive);
int (*ide_dma_bad_drive)(ide_drive_t *drive);
int (*ide_dma_good_drive)(ide_drive_t *drive);
int (*ide_dma_count)(ide_drive_t *drive);
int (*ide_dma_verbose)(ide_drive_t *drive);
int (*ide_dma_retune)(ide_drive_t *drive);
int (*ide_dma_lostirq)(ide_drive_t *drive);
int (*ide_dma_timeout)(ide_drive_t *drive);
/* dma queued operations */
int (*ide_dma_queued_on)(ide_drive_t *drive);
int (*ide_dma_queued_off)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_read)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_write)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_start)(ide_drive_t *drive);
} ide_dma_ops_t;
/*
* mapping stuff, prepare for highmem...
*
* temporarily mapping a (possible) highmem bio for PIO transfer
*/
#ifndef CONFIG_IDE_TASKFILE_IO
#define ide_rq_offset(rq) \
(((rq)->hard_cur_sectors - (rq)->current_nr_sectors) << 9)
/*
* taskfiles really should use hard_cur_sectors as well!
*/
#define task_rq_offset(rq) \
(((rq)->nr_sectors - (rq)->current_nr_sectors) * SECTOR_SIZE)
static inline void *ide_map_buffer(struct request *rq, unsigned long *flags)
{
/*
* fs request
*/
if (rq->bio)
return bio_kmap_irq(rq->bio, flags) + ide_rq_offset(rq);
/*
* task request
*/
return rq->buffer + task_rq_offset(rq);
}
static inline void ide_unmap_buffer(struct request *rq, char *buffer, unsigned long *flags)
{
if (rq->bio)
bio_kunmap_irq(buffer, flags);
}
#endif /* !CONFIG_IDE_TASKFILE_IO */
#define IDE_CHIPSET_PCI_MASK \
((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
#define IDE_CHIPSET_IS_PCI(c) ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
struct ide_pci_device_s;
typedef struct hwif_s {
struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
struct hwif_s *mate; /* other hwif from same PCI chip */
struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */
struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
char name[6]; /* name of interface, eg. "ide0" */
/* task file registers for pata and sata */
unsigned long io_ports[IDE_NR_PORTS];
unsigned long sata_scr[SATA_NR_PORTS];
unsigned long sata_misc[SATA_NR_PORTS];
hw_regs_t hw; /* Hardware info */
ide_drive_t drives[MAX_DRIVES]; /* drive info */
u8 major; /* our major number */
u8 index; /* 0 for ide0; 1 for ide1; ... */
u8 channel; /* for dual-port chips: 0=primary, 1=secondary */
u8 straight8; /* Alan's straight 8 check */
u8 bus_state; /* power state of the IDE bus */
u8 atapi_dma; /* host supports atapi_dma */
u8 ultra_mask;
u8 mwdma_mask;
u8 swdma_mask;
hwif_chipset_t chipset; /* sub-module for tuning.. */
struct pci_dev *pci_dev; /* for pci chipsets */
struct ide_pci_device_s *cds; /* chipset device struct */
struct pnp_dev *pnp_dev; /* for PnP devices */
ide_startstop_t (*rw_disk)(ide_drive_t *, struct request *, sector_t);
#if 0
ide_hwif_ops_t *hwifops;
#else
/* routine is for HBA specific IDENTITY operations */
int (*identify)(ide_drive_t *);
/* routine to tune PIO mode for drives */
void (*tuneproc)(ide_drive_t *, u8);
/* routine to retune DMA modes for drives */
int (*speedproc)(ide_drive_t *, u8);
/* tweaks hardware to select drive */
void (*selectproc)(ide_drive_t *);
/* chipset polling based on hba specifics */
int (*reset_poll)(ide_drive_t *);
/* chipset specific changes to default for device-hba resets */
void (*pre_reset)(ide_drive_t *);
/* routine to reset controller after a disk reset */
void (*resetproc)(ide_drive_t *);
/* special interrupt handling for shared pci interrupts */
void (*intrproc)(ide_drive_t *);
/* special host masking for drive selection */
void (*maskproc)(ide_drive_t *, int);
/* check host's drive quirk list */
int (*quirkproc)(ide_drive_t *);
/* driver soft-power interface */
int (*busproc)(ide_drive_t *, int);
// /* host rate limiter */
// u8 (*ratemask)(ide_drive_t *);
// /* device rate limiter */
// u8 (*ratefilter)(ide_drive_t *, u8);
#endif
#if 0
ide_pio_ops_t *pioops;
#else
void (*ata_input_data)(ide_drive_t *, void *, u32);
void (*ata_output_data)(ide_drive_t *, void *, u32);
void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
#endif
int (*ide_dma_read)(ide_drive_t *drive);
int (*ide_dma_write)(ide_drive_t *drive);
int (*ide_dma_begin)(ide_drive_t *drive);
int (*ide_dma_end)(ide_drive_t *drive);
int (*ide_dma_check)(ide_drive_t *drive);
int (*ide_dma_on)(ide_drive_t *drive);
int (*ide_dma_off)(ide_drive_t *drive);
int (*ide_dma_off_quietly)(ide_drive_t *drive);
int (*ide_dma_test_irq)(ide_drive_t *drive);
int (*ide_dma_host_on)(ide_drive_t *drive);
int (*ide_dma_host_off)(ide_drive_t *drive);
int (*ide_dma_bad_drive)(ide_drive_t *drive);
int (*ide_dma_good_drive)(ide_drive_t *drive);
int (*ide_dma_count)(ide_drive_t *drive);
int (*ide_dma_verbose)(ide_drive_t *drive);
int (*ide_dma_retune)(ide_drive_t *drive);
int (*ide_dma_lostirq)(ide_drive_t *drive);
int (*ide_dma_timeout)(ide_drive_t *drive);
/* dma queued operations */
int (*ide_dma_queued_on)(ide_drive_t *drive);
int (*ide_dma_queued_off)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_read)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_write)(ide_drive_t *drive);
ide_startstop_t (*ide_dma_queued_start)(ide_drive_t *drive);
void (*OUTB)(u8 addr, unsigned long port);
void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
void (*OUTW)(u16 addr, unsigned long port);
void (*OUTL)(u32 addr, unsigned long port);
void (*OUTSW)(unsigned long port, void *addr, u32 count);
void (*OUTSL)(unsigned long port, void *addr, u32 count);
u8 (*INB)(unsigned long port);
u16 (*INW)(unsigned long port);
u32 (*INL)(unsigned long port);
void (*INSW)(unsigned long port, void *addr, u32 count);
void (*INSL)(unsigned long port, void *addr, u32 count);
/* dma physical region descriptor table (cpu view) */
unsigned int *dmatable_cpu;
/* dma physical region descriptor table (dma view) */
dma_addr_t dmatable_dma;
/* Scatter-gather list used to build the above */
struct scatterlist *sg_table;
int sg_nents; /* Current number of entries in it */
int sg_dma_direction; /* dma transfer direction */
int sg_dma_active; /* is it in use */
int mmio; /* hosts iomio (0), mmio (1) or custom (2) select */
int rqsize; /* max sectors per request */
int irq; /* our irq number */
int initializing; /* set while initializing self */
unsigned long dma_master; /* reference base addr dmabase */
unsigned long dma_base; /* base addr for dma ports */
unsigned long dma_command; /* dma command register */
unsigned long dma_vendor1; /* dma vendor 1 register */
unsigned long dma_status; /* dma status register */
unsigned long dma_vendor3; /* dma vendor 3 register */
unsigned long dma_prdtable; /* actual prd table address */
unsigned long dma_base2; /* extended 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 */
#if (DISK_RECOVERY_TIME > 0)
unsigned long last_time; /* time when previous rq was done */
#endif
unsigned noprobe : 1; /* don't probe for this interface */
unsigned present : 1; /* this interface exists */
unsigned hold : 1; /* this interface is always present */
unsigned serialized : 1; /* serialized all channel operation */
unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
unsigned reset : 1; /* reset after probe */
unsigned autodma : 1; /* auto-attempt using DMA at boot */
unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
unsigned no_lba48 : 1; /* 1 = cannot do LBA48 */
unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */
unsigned auto_poll : 1; /* supports nop auto-poll */
struct device gendev;
struct semaphore gendev_rel_sem; /* To deal with device release() */
void *hwif_data; /* extra hwif data */
unsigned dma;
void (*led_act)(void *data, int rw);
} ide_hwif_t;
/*
* internal ide interrupt handler type
*/
typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
typedef ide_startstop_t (ide_post_handler_t)(ide_drive_t *);
typedef int (ide_expiry_t)(ide_drive_t *);
typedef struct hwgroup_s {
/* irq handler, if active */
ide_startstop_t (*handler)(ide_drive_t *);
/* irq handler, suspended if active */
ide_startstop_t (*handler_save)(ide_drive_t *);
/* BOOL: protects all fields below */
volatile int busy;
/* BOOL: wake us up on timer expiry */
int sleeping;
/* current drive */
ide_drive_t *drive;
/* ptr to current hwif in linked-list */
ide_hwif_t *hwif;
/* for pci chipsets */
struct pci_dev *pci_dev;
/* chipset device struct */
struct ide_pci_device_s *cds;
/* current request */
struct request *rq;
/* failsafe timer */
struct timer_list timer;
/* local copy of current write rq */
struct request wrq;
/* timeout value during long polls */
unsigned long poll_timeout;
/* queried upon timeouts */
int (*expiry)(ide_drive_t *);
/* ide_system_bus_speed */
int pio_clock;
unsigned char cmd_buf[4];
} ide_hwgroup_t;
/* structure attached to the request for IDE_TASK_CMDS */
/*
* 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;
extern struct semaphore ide_setting_sem;
extern int 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);
extern void ide_remove_setting(ide_drive_t *drive, char *name);
extern ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
extern int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
extern int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
extern 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
extern void proc_ide_create(void);
extern void proc_ide_destroy(void);
extern void destroy_proc_ide_device(ide_hwif_t *, ide_drive_t *);
extern void destroy_proc_ide_drives(ide_hwif_t *);
extern void create_proc_ide_interfaces(void);
extern void ide_add_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *, void *);
extern void ide_remove_proc_entries(struct proc_dir_entry *, ide_proc_entry_t *);
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
/*
* Power Management step value (rq->pm->pm_step).
*
* The step value starts at 0 (ide_pm_state_start_suspend) for a
* suspend operation or 1000 (ide_pm_state_start_resume) for a
* resume operation.
*
* For each step, the core calls the subdriver start_power_step() first.
* This can return:
* - ide_stopped : In this case, the core calls us back again unless
* step have been set to ide_power_state_completed.
* - ide_started : In this case, the channel is left busy until an
* async event (interrupt) occurs.
* Typically, start_power_step() will issue a taskfile request with
* do_rw_taskfile().
*
* Upon reception of the interrupt, the core will call complete_power_step()
* with the error code if any. This routine should update the step value
* and return. It should not start a new request. The core will call
* start_power_step for the new step value, unless step have been set to
* ide_power_state_completed.
*
* Subdrivers are expected to define their own additional power
* steps from 1..999 for suspend and from 1001..1999 for resume,
* other values are reserved for future use.
*/
enum {
ide_pm_state_completed = -1,
ide_pm_state_start_suspend = 0,
ide_pm_state_start_resume = 1000,
};
/*
* Subdrivers support.
*/
#define IDE_SUBDRIVER_VERSION 1
typedef struct ide_driver_s {
struct module *owner;
const char *name;
const char *version;
u8 media;
unsigned busy : 1;
unsigned supports_dsc_overlap : 1;
int (*cleanup)(ide_drive_t *);
int (*shutdown)(ide_drive_t *);
int (*flushcache)(ide_drive_t *);
ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
int (*end_request)(ide_drive_t *, int, int);
u8 (*sense)(ide_drive_t *, const char *, u8);
ide_startstop_t (*error)(ide_drive_t *, const char *, u8);
ide_startstop_t (*abort)(ide_drive_t *, const char *);
int (*ioctl)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
void (*pre_reset)(ide_drive_t *);
sector_t (*capacity)(ide_drive_t *);
ide_startstop_t (*special)(ide_drive_t *);
ide_proc_entry_t *proc;
int (*attach)(ide_drive_t *);
void (*ata_prebuilder)(ide_drive_t *);
void (*atapi_prebuilder)(ide_drive_t *);
ide_startstop_t (*start_power_step)(ide_drive_t *, struct request *);
void (*complete_power_step)(ide_drive_t *, struct request *, u8, u8);
struct device_driver gen_driver;
struct list_head drives;
struct list_head drivers;
} ide_driver_t;
#define DRIVER(drive) ((drive)->driver)
extern int generic_ide_ioctl(struct block_device *, unsigned, unsigned long);
typedef struct ide_devices_s {
char name[4]; /* hdX */
unsigned attached : 1; /* native */
unsigned alttached : 1; /* alternate */
struct ide_devices_s *next;
} ide_devices_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 int (*ide_probe)(void);
extern ide_devices_t *idedisk;
extern ide_devices_t *idecd;
extern ide_devices_t *idefloppy;
extern ide_devices_t *idetape;
extern ide_devices_t *idescsi;
#endif
extern int noautodma;
extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
/*
* This is used on exit from the driver to designate the next irq handler
* and also to start the safety timer.
*/
extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
/*
* This is used on exit from the driver to designate the next irq handler
* and start the safety time safely and atomically from the IRQ handler
* with respect to the command issue (which it also does)
*/
extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
/*
* Error reporting, in human readable form (luxurious, but a memory hog).
*
* (drive, msg, status)
*/
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 caller should return immediately after invoking this.
*
* (drive, msg, status)
*/
ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
/*
* Abort a running command on the controller triggering the abort
* from a host side, non error situation
* (drive, msg)
*/
extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
/*
* Issue a simple drive command
* The drive must be selected beforehand.
*
* (drive, command, nsector, handler)
*/
extern void ide_cmd(ide_drive_t *, u8, u8, ide_handler_t *);
extern void ide_fix_driveid(struct hd_driveid *);
/*
* 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.
*
* (s, bytecount, byteswap)
*/
extern void ide_fixstring(u8 *, const int, const int);
/*
* 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 doing "*startstop = ide_error()", and the
* caller should return the updated value of "startstop" in this case.
* "startstop" is unchanged when the function returns 0;
* (startstop, drive, good, bad, timeout)
*/
extern int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
/*
* Return the current idea about the total capacity of this drive.
*/
extern sector_t current_capacity (ide_drive_t *drive);
/*
* Start a reset operation for an IDE interface.
* The caller should return immediately after invoking this.
*/
extern ide_startstop_t ide_do_reset (ide_drive_t *);
/*
* This function is intended to be used prior to invoking ide_do_drive_cmd().
*/
extern 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_head_wait, /* insert rq in front of current request and wait for it */
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.
*/
extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
/*
* Clean up after success/failure of an explicit drive cmd.
* stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
* stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASK_MASK).
*
* (ide_drive_t *drive, u8 stat, u8 err)
*/
extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
/*
* Issue ATA command and wait for completion.
* Use for implementing commands in kernel
*
* (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
*/
extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
/* (ide_drive_t *drive, u8 *buf) */
extern int ide_wait_cmd_task(ide_drive_t *, u8 *);
typedef struct ide_task_s {
/*
* struct hd_drive_task_hdr tf;
* task_struct_t tf;
* struct hd_drive_hob_hdr hobf;
* hob_struct_t hobf;
*/
task_ioreg_t tfRegister[8];
task_ioreg_t hobRegister[8];
ide_reg_valid_t tf_out_flags;
ide_reg_valid_t tf_in_flags;
int data_phase;
int command_type;
ide_pre_handler_t *prehandler;
ide_handler_t *handler;
ide_post_handler_t *posthandler;
struct request *rq; /* copy of request */
void *special; /* valid_t generally */
} ide_task_t;
typedef struct pkt_task_s {
/*
* struct hd_drive_task_hdr pktf;
* task_struct_t pktf;
* u8 pkcdb[12];
*/
task_ioreg_t tfRegister[8];
int data_phase;
int command_type;
ide_handler_t *handler;
struct request *rq; /* copy of request */
void *special;
} pkt_task_t;
extern inline u32 ide_read_24(ide_drive_t *);
extern inline void SELECT_DRIVE(ide_drive_t *);
extern inline void SELECT_INTERRUPT(ide_drive_t *);
extern inline void SELECT_MASK(ide_drive_t *, int);
extern inline void QUIRK_LIST(ide_drive_t *);
extern void ata_input_data(ide_drive_t *, void *, u32);
extern void ata_output_data(ide_drive_t *, void *, u32);
extern void atapi_input_bytes(ide_drive_t *, void *, u32);
extern void atapi_output_bytes(ide_drive_t *, void *, u32);
extern void taskfile_input_data(ide_drive_t *, void *, u32);
extern void taskfile_output_data(ide_drive_t *, void *, u32);
#ifdef CONFIG_IDE_TASKFILE_IO
#define IDE_PIO_IN 0
#define IDE_PIO_OUT 1
static inline void task_sectors(ide_drive_t *drive, struct request *rq,
unsigned nsect, int rw)
{
unsigned long flags;
unsigned int bio_rq;
char *buf;
/*
* bio_rq flag is needed because we can call
* rq_unmap_buffer() with rq->cbio == NULL
*/
bio_rq = rq->cbio ? 1 : 0;
if (bio_rq)
buf = rq_map_buffer(rq, &flags); /* fs request */
else
buf = rq->buffer + blk_rq_offset(rq); /* task request */
/*
* IRQ can happen instantly after reading/writing
* last sector of the datablock.
*/
process_that_request_first(rq, nsect);
if (rw == IDE_PIO_OUT)
taskfile_output_data(drive, buf, nsect * SECTOR_WORDS);
else
taskfile_input_data(drive, buf, nsect * SECTOR_WORDS);
if (bio_rq)
rq_unmap_buffer(buf, &flags);
}
#endif /* CONFIG_IDE_TASKFILE_IO */
extern int drive_is_ready(ide_drive_t *);
extern int wait_for_ready(ide_drive_t *, int /* timeout */);
/*
* taskfile io for disks for now...and builds request from ide_ioctl
*/
extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
/* (ide_drive_t *drive, u8 stat, u8 err) */
extern void ide_end_taskfile(ide_drive_t *, u8, u8);
/*
* Special Flagged Register Validation Caller
*/
extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
extern ide_startstop_t set_multmode_intr(ide_drive_t *);
extern ide_startstop_t set_geometry_intr(ide_drive_t *);
extern ide_startstop_t recal_intr(ide_drive_t *);
extern ide_startstop_t task_no_data_intr(ide_drive_t *);
extern ide_startstop_t task_in_intr(ide_drive_t *);
extern ide_startstop_t task_mulin_intr(ide_drive_t *);
extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
extern ide_startstop_t task_out_intr(ide_drive_t *);
extern ide_startstop_t pre_task_mulout_intr(ide_drive_t *, struct request *);
extern ide_startstop_t task_mulout_intr(ide_drive_t *);
extern void ide_init_drive_taskfile(struct request *);
extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
extern ide_pre_handler_t * ide_pre_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
extern ide_handler_t * ide_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
extern ide_post_handler_t * ide_post_handler_parser(struct hd_drive_task_hdr *, struct hd_drive_hob_hdr *);
/* Expects args is a full set of TF registers and parses the command type */
extern int ide_cmd_type_parser(ide_task_t *);
int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
#if 0
#define IDEFLOPPY_PC_BUFFER_SIZE 256
#define IDETAPE_PC_BUFFER_SIZE 256
#define IDE_PC_BUFFER_SIZE 256
typedef struct ide_packet_command_s {
/* Actual packet bytes */
u8 c[12];
/* On each retry, we increment retries */
int retries;
/* Error code */
int error;
/* Bytes to transfer */
int request_transfer;
/* Bytes actually transferred */
int actually_transferred;
/* Size of our data buffer */
int buffer_size;
struct buffer_head *bh;
u8 *b_data;
/* The corresponding request */
struct request *rq;
# if 0
/* Scatter gather table */
struct scatterlist *sg;
# endif
int b_count;
/* Data buffer */
u8 *buffer;
/* Pointer into the above buffer */
u8 *current_position;
/* Called when this packet command is completed */
ide_startstop_t (*callback) (ide_drive_t *);
/* Temporary buffer */
u8 pc_buffer[IDE_PC_BUFFER_SIZE];
/* Status/Action bit flags: long for set_bit */
unsigned long flags;
} ide_pc_t;
ide-cd orthoginal :-/
struct packet_command {
char *buffer;
int buflen;
int stat;
int quiet;
int timeout;
struct request_sense *sense;
unsigned char c[12];
};
#endif
#ifdef CONFIG_PKT_TASK_IOCTL
extern int pkt_taskfile_ioctl(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
#endif /* CONFIG_PKT_TASK_IOCTL */
extern void ide_delay_50ms(void);
extern int system_bus_clock(void);
extern u8 ide_auto_reduce_xfer(ide_drive_t *);
extern int ide_driveid_update(ide_drive_t *);
extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
extern int ide_config_drive_speed(ide_drive_t *, u8);
extern u8 eighty_ninty_three (ide_drive_t *);
extern int set_transfer(ide_drive_t *, ide_task_t *);
extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, sector_t block);
/*
* 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.
*/
extern int ide_system_bus_speed(void);
/*
* ide_stall_queue() can be used by a drive to give excess bandwidth back
* to the hwgroup by sleeping for timeout jiffies.
*/
extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
extern int ide_spin_wait_hwgroup(ide_drive_t *);
extern void ide_timer_expiry(unsigned long);
extern irqreturn_t ide_intr(int irq, void *dev_id, struct pt_regs *regs);
extern void do_ide_request(request_queue_t *);
extern void ide_init_subdrivers(void);
extern struct block_device_operations ide_fops[];
extern ide_proc_entry_t generic_subdriver_entries[];
extern int ata_attach(ide_drive_t *);
extern int ideprobe_init(void);
extern void ide_scan_pcibus(int scan_direction) __init;
extern int ide_pci_register_driver(struct pci_driver *driver);
extern void ide_pci_unregister_driver(struct pci_driver *driver);
extern void ide_pci_setup_ports(struct pci_dev *dev, struct ide_pci_device_s *d, int autodma, int pciirq, ata_index_t *index);
extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);
extern void default_hwif_iops(ide_hwif_t *);
extern void default_hwif_mmiops(ide_hwif_t *);
extern void default_hwif_transport(ide_hwif_t *);
int ide_register_driver(ide_driver_t *driver);
void ide_unregister_driver(ide_driver_t *driver);
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_PROC_FS
typedef struct ide_pci_host_proc_s {
char *name;
u8 set;
get_info_t *get_info;
struct proc_dir_entry *parent;
struct ide_pci_host_proc_s *next;
} ide_pci_host_proc_t;
void ide_pci_register_host_proc(ide_pci_host_proc_t *);
#endif /* CONFIG_PROC_FS */
#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 */
#define NODMA 0
#define NOAUTODMA 1
#define AUTODMA 2
#define EOL 255
typedef struct ide_pci_enablebit_s {
u8 reg; /* byte pci reg holding the enable-bit */
u8 mask; /* mask to isolate the enable-bit */
u8 val; /* value of masked reg when "enabled" */
} ide_pci_enablebit_t;
typedef struct ide_pci_device_s {
u16 vendor;
u16 device;
char *name;
void (*init_setup)(struct pci_dev *, struct ide_pci_device_s *);
void (*init_setup_dma)(struct pci_dev *, struct ide_pci_device_s *, ide_hwif_t *);
unsigned int (*init_chipset)(struct pci_dev *, const char *);
void (*init_iops)(ide_hwif_t *);
void (*init_hwif)(ide_hwif_t *);
void (*init_dma)(ide_hwif_t *, unsigned long);
u8 channels;
u8 autodma;
ide_pci_enablebit_t enablebits[2];
u8 bootable;
unsigned int extra;
struct ide_pci_device_s *next;
u8 isa_ports; /* Uses ISA control ports not PCI ones */
} ide_pci_device_t;
extern void ide_setup_pci_device(struct pci_dev *, ide_pci_device_t *);
extern void ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, ide_pci_device_t *);
#define BAD_DMA_DRIVE 0
#define GOOD_DMA_DRIVE 1
#ifdef CONFIG_BLK_DEV_IDEDMA_PCI
extern int ide_build_dmatable(ide_drive_t *, struct request *);
extern void ide_destroy_dmatable(ide_drive_t *);
extern ide_startstop_t ide_dma_intr(ide_drive_t *);
extern int ide_release_dma(ide_hwif_t *);
extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
extern int ide_start_dma(ide_hwif_t *, ide_drive_t *, int);
extern int __ide_dma_host_off(ide_drive_t *);
extern int __ide_dma_off_quietly(ide_drive_t *);
extern int __ide_dma_off(ide_drive_t *);
extern int __ide_dma_host_on(ide_drive_t *);
extern int __ide_dma_on(ide_drive_t *);
extern int __ide_dma_check(ide_drive_t *);
extern int __ide_dma_read(ide_drive_t *);
extern int __ide_dma_write(ide_drive_t *);
extern int __ide_dma_begin(ide_drive_t *);
extern int __ide_dma_end(ide_drive_t *);
extern int __ide_dma_test_irq(ide_drive_t *);
extern int __ide_dma_bad_drive(ide_drive_t *);
extern int __ide_dma_good_drive(ide_drive_t *);
extern int __ide_dma_count(ide_drive_t *);
extern int __ide_dma_verbose(ide_drive_t *);
extern int __ide_dma_retune(ide_drive_t *);
extern int __ide_dma_lostirq(ide_drive_t *);
extern int __ide_dma_timeout(ide_drive_t *);
#ifdef CONFIG_BLK_DEV_IDE_TCQ
extern int __ide_dma_queued_on(ide_drive_t *drive);
extern int __ide_dma_queued_off(ide_drive_t *drive);
extern ide_startstop_t __ide_dma_queued_read(ide_drive_t *drive);
extern ide_startstop_t __ide_dma_queued_write(ide_drive_t *drive);
extern ide_startstop_t __ide_dma_queued_start(ide_drive_t *drive);
#else
static inline int __ide_dma_queued_on(ide_drive_t *drive)
{
return 1;
}
static inline int __ide_dma_queued_off(ide_drive_t *drive)
{
return 1;
}
#endif
#else
static inline void ide_release_dma(ide_hwif_t *drive) {;}
#endif
extern int ide_hwif_request_regions(ide_hwif_t *hwif);
extern void ide_hwif_release_regions(ide_hwif_t* hwif);
extern void ide_unregister (unsigned int index);
extern int probe_hwif_init(ide_hwif_t *);
static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
{
return hwif->hwif_data;
}
static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
{
hwif->hwif_data = data;
}
/* ide-lib.c */
extern u8 ide_dma_speed(ide_drive_t *drive, u8 mode);
extern u8 ide_rate_filter(u8 mode, u8 speed);
extern int ide_dma_enable(ide_drive_t *drive);
extern char *ide_xfer_verbose(u8 xfer_rate);
extern void ide_toggle_bounce(ide_drive_t *drive, int on);
extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
typedef struct ide_pio_timings_s {
int setup_time; /* Address setup (ns) minimum */
int active_time; /* Active pulse (ns) minimum */
int cycle_time; /* Cycle time (ns) minimum = (setup + active + recovery) */
} ide_pio_timings_t;
typedef struct ide_pio_data_s {
u8 pio_mode;
u8 use_iordy;
u8 overridden;
u8 blacklisted;
unsigned int cycle_time;
} ide_pio_data_t;
extern u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d);
extern const ide_pio_timings_t ide_pio_timings[6];
extern spinlock_t ide_lock;
extern struct semaphore ide_cfg_sem;
/*
* Structure locking:
*
* ide_cfg_sem and ide_lock together protect changes to
* ide_hwif_t->{next,hwgroup}
* ide_drive_t->next
*
* ide_hwgroup_t->busy: ide_lock
* ide_hwgroup_t->hwif: ide_lock
* ide_hwif_t->mate: constant, no locking
* ide_drive_t->hwif: constant, no locking
*/
#define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable(); } while (0)
#define IDE_MAX_TAG 32
#ifdef CONFIG_BLK_DEV_IDE_TCQ
static inline int ata_pending_commands(ide_drive_t *drive)
{
if (drive->using_tcq)
return blk_queue_tag_depth(drive->queue);
return 0;
}
static inline int ata_can_queue(ide_drive_t *drive)
{
if (drive->using_tcq)
return blk_queue_tag_queue(drive->queue);
return 1;
}
#else
#define ata_pending_commands(drive) (0)
#define ata_can_queue(drive) (1)
#endif
extern struct bus_type ide_bus_type;
#endif /* _IDE_H */