ide.h
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- #ifndef _IDE_H
- #define _IDE_H
- /*
- * linux/include/linux/ide.h
- *
- * Copyright (C) 1994-1998 Linus Torvalds & authors
- */
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/ioport.h>
- #include <linux/hdreg.h>
- #include <linux/hdsmart.h>
- #include <linux/blkdev.h>
- #include <linux/proc_fs.h>
- #include <linux/devfs_fs_kernel.h>
- #include <asm/hdreg.h>
- /*
- * This is the multiple IDE interface driver, as evolved from hd.c.
- * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15).
- * There can be up to two drives per interface, as per the ATA-2 spec.
- *
- * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64
- * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64
- * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64
- * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64
- */
- /******************************************************************************
- * IDE driver configuration options (play with these as desired):
- *
- * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
- */
- #undef REALLY_FAST_IO /* define if ide ports are perfect */
- #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */
- #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */
- #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */
- #endif
- #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */
- #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */
- #endif
- #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */
- #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */
- #endif
- #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */
- #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */
- #endif
- #ifndef 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
- /*
- * IDE_DRIVE_CMD is used to implement many features of the hdparm utility
- */
- #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/
- /*
- * IDE_DRIVE_TASK is used to implement many features needed for raw tasks
- */
- #define IDE_DRIVE_TASK 98
- #define IDE_DRIVE_CMD_AEB 98
- /*
- * "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 */
- /*
- * 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_REG (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
- #define IDE_ERROR_REG (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
- #define IDE_NSECTOR_REG (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
- #define IDE_SECTOR_REG (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
- #define IDE_LCYL_REG (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
- #define IDE_HCYL_REG (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
- #define IDE_SELECT_REG (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
- #define IDE_STATUS_REG (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
- #define IDE_CONTROL_REG (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
- #define IDE_IRQ_REG (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
- #define IDE_FEATURE_REG IDE_ERROR_REG
- #define IDE_COMMAND_REG IDE_STATUS_REG
- #define IDE_ALTSTATUS_REG IDE_CONTROL_REG
- #define IDE_IREASON_REG IDE_NSECTOR_REG
- #define IDE_BCOUNTL_REG IDE_LCYL_REG
- #define IDE_BCOUNTH_REG IDE_HCYL_REG
- #define GET_ERR() IN_BYTE(IDE_ERROR_REG)
- #define GET_STAT() IN_BYTE(IDE_STATUS_REG)
- #define GET_ALTSTAT() IN_BYTE(IDE_CONTROL_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 "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_WORDS (512 / 4) /* number of 32bit words per sector */
- #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
- #define IDE_MIN(a,b) ((a)<(b) ? (a):(b))
- #define IDE_MAX(a,b) ((a)>(b) ? (a):(b))
- /*
- * Timeouts for various operations:
- */
- #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */
- #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 SELECT_DRIVE(hwif,drive)
- {
- if (hwif->selectproc)
- hwif->selectproc(drive);
- OUT_BYTE((drive)->select.all, hwif->io_ports[IDE_SELECT_OFFSET]);
- }
- #define SELECT_INTERRUPT(hwif,drive)
- {
- if (hwif->intrproc)
- hwif->intrproc(drive);
- else
- OUT_BYTE((drive)->ctl|2, hwif->io_ports[IDE_CONTROL_OFFSET]);
- }
- #define SELECT_MASK(hwif,drive,mask)
- {
- if (hwif->maskproc)
- hwif->maskproc(drive,mask);
- }
- #define SELECT_READ_WRITE(hwif,drive,func)
- {
- if (hwif->rwproc)
- hwif->rwproc(drive,func);
- }
- #define QUIRK_LIST(hwif,drive)
- {
- if (hwif->quirkproc)
- (drive)->quirk_list = hwif->quirkproc(drive);
- }
- #define IDE_DEBUG(lineno)
- printk("%s,%s,line=%dn", __FILE__, __FUNCTION__, (lineno))
- /*
- * Check for an interrupt and acknowledge the interrupt status
- */
- struct hwif_s;
- struct ide_drive_s;
- typedef int (ide_ack_intr_t)(struct hwif_s *);
- typedef void (ide_xfer_data_t)(struct ide_drive_s *, void *, unsigned int);
- #ifndef NO_DMA
- #define NO_DMA 255
- #endif
- /*
- * Structure to hold all information about the location of this port
- */
- typedef struct hw_regs_s {
- ide_ioreg_t io_ports[IDE_NR_PORTS]; /* task file registers */
- int irq; /* our irq number */
- int dma; /* our dma number */
- ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
- ide_xfer_data_t *ide_output_data; /* write data to i/face */
- ide_xfer_data_t *ide_input_data; /* read data from i/face */
- ide_xfer_data_t *atapi_output_bytes; /* write bytes to i/face */
- ide_xfer_data_t *atapi_input_bytes; /* read bytes from i/face */
- void *priv; /* interface specific data */
- } 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,
- ide_ioreg_t base,
- int *offsets,
- ide_ioreg_t ctrl,
- ide_ioreg_t intr,
- ide_ack_intr_t *ack_intr,
- int irq);
- #include <asm/ide.h>
- /*
- * If the arch-dependant ide.h did not declare/define any OUT_BYTE
- * or IN_BYTE functions, we make some defaults here.
- */
- #ifndef HAVE_ARCH_OUT_BYTE
- #ifdef REALLY_FAST_IO
- #define OUT_BYTE(b,p) outb((b),(p))
- #else
- #define OUT_BYTE(b,p) outb_p((b),(p))
- #endif
- #endif
- #ifndef HAVE_ARCH_IN_BYTE
- #ifdef REALLY_FAST_IO
- #define IN_BYTE(p) (byte)inb_p(p)
- #else
- #define IN_BYTE(p) (byte)inb(p)
- #endif
- #endif
- /*
- * Now for the data we need to maintain per-drive: ide_drive_t
- */
- #define ide_scsi 0x21
- #define ide_disk 0x20
- #define ide_optical 0x7
- #define ide_cdrom 0x5
- #define ide_tape 0x1
- #define ide_floppy 0x0
- typedef union {
- unsigned all : 8; /* all of the bits together */
- struct {
- unsigned set_geometry : 1; /* respecify drive geometry */
- unsigned recalibrate : 1; /* seek to cyl 0 */
- unsigned set_multmode : 1; /* set multmode count */
- unsigned set_tune : 1; /* tune interface for drive */
- unsigned reserved : 4; /* unused */
- } b;
- } special_t;
- typedef struct ide_drive_s {
- request_queue_t queue; /* request queue */
- struct ide_drive_s *next; /* circular list of hwgroup drives */
- unsigned long sleep; /* sleep until this time */
- unsigned long service_start; /* time we started last request */
- unsigned long service_time; /* service time of last request */
- unsigned long timeout; /* max time to wait for irq */
- special_t special; /* special action flags */
- byte keep_settings; /* restore settings after drive reset */
- byte using_dma; /* disk is using dma for read/write */
- byte retry_pio; /* retrying dma capable host in pio */
- byte state; /* retry state */
- byte waiting_for_dma; /* dma currently in progress */
- byte unmask; /* flag: okay to unmask other irqs */
- byte slow; /* flag: slow data port */
- byte bswap; /* flag: byte swap data */
- byte dsc_overlap; /* flag: DSC overlap */
- byte nice1; /* flag: give potential excess bandwidth */
- unsigned present : 1; /* drive is physically present */
- unsigned noprobe : 1; /* from: hdx=noprobe */
- unsigned busy : 1; /* currently doing revalidate_disk() */
- unsigned removable : 1; /* 1 if need to do check_media_change */
- unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */
- unsigned no_unmask : 1; /* disallow setting unmask bit */
- unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */
- unsigned nobios : 1; /* flag: do not probe bios for drive */
- unsigned revalidate : 1; /* request revalidation */
- unsigned atapi_overlap : 1; /* flag: ATAPI overlap (not supported) */
- unsigned nice0 : 1; /* flag: give obvious excess bandwidth */
- unsigned nice2 : 1; /* flag: give a share in our own bandwidth */
- unsigned doorlocking : 1; /* flag: for removable only: door lock/unlock works */
- unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */
- unsigned remap_0_to_1 : 2; /* 0=remap if ezdrive, 1=remap, 2=noremap */
- unsigned ata_flash : 1; /* 1=present, 0=default */
- byte scsi; /* 0=default, 1=skip current ide-subdriver for ide-scsi emulation */
- byte media; /* disk, cdrom, tape, floppy, ... */
- select_t select; /* basic drive/head select reg value */
- byte ctl; /* "normal" value for IDE_CONTROL_REG */
- byte ready_stat; /* min status value for drive ready */
- byte mult_count; /* current multiple sector setting */
- byte mult_req; /* requested multiple sector setting */
- byte tune_req; /* requested drive tuning setting */
- byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
- byte bad_wstat; /* used for ignoring WRERR_STAT */
- byte nowerr; /* used for ignoring WRERR_STAT */
- byte sect0; /* offset of first sector for DM6:DDO */
- byte usage; /* current "open()" count for drive */
- byte head; /* "real" number of heads */
- byte sect; /* "real" sectors per track */
- byte bios_head; /* BIOS/fdisk/LILO number of heads */
- byte bios_sect; /* BIOS/fdisk/LILO sectors per track */
- unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */
- unsigned int cyl; /* "real" number of cyls */
- unsigned long capacity; /* total number of sectors */
- unsigned int drive_data; /* for use by tuneproc/selectproc as needed */
- void *hwif; /* actually (ide_hwif_t *) */
- wait_queue_head_t wqueue; /* used to wait for drive in open() */
- struct hd_driveid *id; /* drive model identification info */
- struct hd_struct *part; /* drive partition table */
- char name[4]; /* drive name, such as "hda" */
- void *driver; /* (ide_driver_t *) */
- void *driver_data; /* extra driver data */
- devfs_handle_t de; /* directory for device */
- struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
- void *settings; /* /proc/ide/ drive settings */
- char driver_req[10]; /* requests specific driver */
- 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 */
- byte quirk_list; /* drive is considered quirky if set for a specific host */
- byte suspend_reset; /* drive suspend mode flag, soft-reset recovers */
- byte init_speed; /* transfer rate set at boot */
- byte current_speed; /* current transfer rate set */
- byte dn; /* now wide spread use */
- unsigned int failures; /* current failure count */
- unsigned int max_failures; /* maximum allowed failure count */
- } ide_drive_t;
- /*
- * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive.
- *
- * The caller is assumed to have selected the drive and programmed the drive's
- * sector address using CHS or LBA. All that remains is to prepare for DMA
- * and then issue the actual read/write DMA/PIO command to the drive.
- *
- * Returns 0 if all went well.
- * Returns 1 if DMA read/write could not be started, in which case the caller
- * should either try again later, or revert to PIO for the current request.
- */
- typedef enum { ide_dma_read, ide_dma_write, ide_dma_begin,
- ide_dma_end, ide_dma_check, ide_dma_on,
- ide_dma_off, ide_dma_off_quietly, ide_dma_test_irq,
- ide_dma_bad_drive, ide_dma_good_drive,
- ide_dma_verbose, ide_dma_retune,
- ide_dma_lostirq, ide_dma_timeout
- } ide_dma_action_t;
- typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *);
- /*
- * An ide_ideproc_t() performs CPU-polled transfers to/from a drive.
- * Arguments are: the drive, the buffer pointer, and the length (in bytes or
- * words depending on if it's an IDE or ATAPI call).
- *
- * If it is not defined for a controller, standard-code is used from ide.c.
- *
- * Controllers which are not memory-mapped in the standard way need to
- * override that mechanism using this function to work.
- *
- */
- typedef enum { ideproc_ide_input_data, ideproc_ide_output_data,
- ideproc_atapi_input_bytes, ideproc_atapi_output_bytes
- } ide_ide_action_t;
- typedef void (ide_ideproc_t)(ide_ide_action_t, ide_drive_t *, void *, unsigned int);
- /*
- * 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);
- typedef int (ide_speedproc_t) (ide_drive_t *, byte);
- /*
- * This is used to provide support for strange interfaces
- */
- typedef void (ide_selectproc_t) (ide_drive_t *);
- typedef void (ide_resetproc_t) (ide_drive_t *);
- typedef int (ide_quirkproc_t) (ide_drive_t *);
- typedef void (ide_intrproc_t) (ide_drive_t *);
- typedef void (ide_maskproc_t) (ide_drive_t *, int);
- typedef void (ide_rw_proc_t) (ide_drive_t *, ide_dma_action_t);
- /*
- * ide soft-power support
- */
- typedef int (ide_busproc_t) (struct hwif_s *, int);
- /*
- * 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
- } hwif_chipset_t;
- #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)
- #ifdef CONFIG_BLK_DEV_IDEPCI
- typedef struct ide_pci_devid_s {
- unsigned short vid;
- unsigned short did;
- } ide_pci_devid_t;
- #define IDE_PCI_DEVID_NULL ((ide_pci_devid_t){0,0})
- #define IDE_PCI_DEVID_EQ(a,b) (a.vid == b.vid && a.did == b.did)
- #endif /* CONFIG_BLK_DEV_IDEPCI */
- typedef struct hwif_s {
- struct hwif_s *next; /* for linked-list in ide_hwgroup_t */
- void *hwgroup; /* actually (ide_hwgroup_t *) */
- ide_ioreg_t io_ports[IDE_NR_PORTS]; /* task file registers */
- hw_regs_t hw; /* Hardware info */
- ide_drive_t drives[MAX_DRIVES]; /* drive info */
- struct gendisk *gd; /* gendisk structure */
- ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */
- ide_speedproc_t *speedproc; /* routine to retune DMA modes for drives */
- ide_selectproc_t *selectproc; /* tweaks hardware to select drive */
- ide_resetproc_t *resetproc; /* routine to reset controller after a disk reset */
- ide_intrproc_t *intrproc; /* special interrupt handling for shared pci interrupts */
- ide_maskproc_t *maskproc; /* special host masking for drive selection */
- ide_quirkproc_t *quirkproc; /* check host's drive quirk list */
- ide_rw_proc_t *rwproc; /* adjust timing based upon rq->cmd direction */
- ide_ideproc_t *ideproc; /* CPU-polled transfer routine */
- ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */
- unsigned int *dmatable_cpu; /* dma physical region descriptor table (cpu view) */
- dma_addr_t dmatable_dma; /* dma physical region descriptor table (dma view) */
- struct scatterlist *sg_table; /* Scatter-gather list used to build the above */
- int sg_nents; /* Current number of entries in it */
- int sg_dma_direction; /* dma transfer direction */
- int sg_dma_active; /* is it in use */
- struct hwif_s *mate; /* other hwif from same PCI chip */
- unsigned long dma_base; /* base addr for dma ports */
- unsigned dma_extra; /* extra addr for dma ports */
- unsigned long config_data; /* for use by chipset-specific code */
- unsigned long select_data; /* for use by chipset-specific code */
- struct proc_dir_entry *proc; /* /proc/ide/ directory entry */
- int irq; /* our irq number */
- byte major; /* our major number */
- char name[6]; /* name of interface, eg. "ide0" */
- byte index; /* 0 for ide0; 1 for ide1; ... */
- hwif_chipset_t chipset; /* sub-module for tuning.. */
- unsigned noprobe : 1; /* don't probe for this interface */
- unsigned present : 1; /* this interface exists */
- unsigned serialized : 1; /* serialized operation with mate hwif */
- unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */
- unsigned reset : 1; /* reset after probe */
- unsigned autodma : 1; /* automatically try to enable DMA at boot */
- unsigned udma_four : 1; /* 1=ATA-66 capable, 0=default */
- byte channel; /* for dual-port chips: 0=primary, 1=secondary */
- #ifdef CONFIG_BLK_DEV_IDEPCI
- struct pci_dev *pci_dev; /* for pci chipsets */
- ide_pci_devid_t pci_devid; /* for pci chipsets: {VID,DID} */
- #endif /* CONFIG_BLK_DEV_IDEPCI */
- #if (DISK_RECOVERY_TIME > 0)
- unsigned long last_time; /* time when previous rq was done */
- #endif
- byte straight8; /* Alan's straight 8 check */
- void *hwif_data; /* extra hwif data */
- ide_busproc_t *busproc; /* driver soft-power interface */
- byte bus_state; /* power state of the IDE bus */
- } ide_hwif_t;
- /*
- * Status returned from various ide_ functions
- */
- typedef enum {
- ide_stopped, /* no drive operation was started */
- ide_started /* a drive operation was started, and a handler was set */
- } ide_startstop_t;
- /*
- * internal ide interrupt handler type
- */
- typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
- /*
- * when ide_timer_expiry fires, invoke a handler of this type
- * to decide what to do.
- */
- typedef int (ide_expiry_t)(ide_drive_t *);
- typedef struct hwgroup_s {
- ide_handler_t *handler;/* irq handler, if active */
- volatile int busy; /* BOOL: protects all fields below */
- int sleeping; /* BOOL: wake us up on timer expiry */
- 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_expiry_t *expiry; /* queried upon timeouts */
- } ide_hwgroup_t;
- /*
- * configurable drive settings
- */
- #define TYPE_INT 0
- #define TYPE_INTA 1
- #define TYPE_BYTE 2
- #define TYPE_SHORT 3
- #define SETTING_READ (1 << 0)
- #define SETTING_WRITE (1 << 1)
- #define SETTING_RW (SETTING_READ | SETTING_WRITE)
- typedef int (ide_procset_t)(ide_drive_t *, int);
- typedef struct ide_settings_s {
- char *name;
- int rw;
- int read_ioctl;
- int write_ioctl;
- int data_type;
- int min;
- int max;
- int mul_factor;
- int div_factor;
- void *data;
- ide_procset_t *set;
- int auto_remove;
- struct ide_settings_s *next;
- } ide_settings_t;
- void ide_add_setting(ide_drive_t *drive, const char *name, int rw, int read_ioctl, int write_ioctl, int data_type, int min, int max, int mul_factor, int div_factor, void *data, ide_procset_t *set);
- void ide_remove_setting(ide_drive_t *drive, char *name);
- ide_settings_t *ide_find_setting_by_name(ide_drive_t *drive, char *name);
- int ide_read_setting(ide_drive_t *t, ide_settings_t *setting);
- int ide_write_setting(ide_drive_t *drive, ide_settings_t *setting, int val);
- void ide_add_generic_settings(ide_drive_t *drive);
- /*
- * /proc/ide interface
- */
- typedef struct {
- const char *name;
- mode_t mode;
- read_proc_t *read_proc;
- write_proc_t *write_proc;
- } ide_proc_entry_t;
- #ifdef CONFIG_PROC_FS
- void proc_ide_create(void);
- void proc_ide_destroy(void);
- void destroy_proc_ide_drives(ide_hwif_t *);
- void create_proc_ide_interfaces(void);
- void ide_add_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p, void *data);
- void ide_remove_proc_entries(struct proc_dir_entry *dir, ide_proc_entry_t *p);
- read_proc_t proc_ide_read_capacity;
- read_proc_t proc_ide_read_geometry;
- /*
- * Standard exit stuff:
- */
- #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len)
- {
- len -= off;
- if (len < count) {
- *eof = 1;
- if (len <= 0)
- return 0;
- } else
- len = count;
- *start = page + off;
- return len;
- }
- #else
- #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
- #endif
- /*
- * Subdrivers support.
- */
- #define IDE_SUBDRIVER_VERSION 1
- typedef int (ide_cleanup_proc)(ide_drive_t *);
- typedef ide_startstop_t (ide_do_request_proc)(ide_drive_t *, struct request *, unsigned long);
- typedef void (ide_end_request_proc)(byte, ide_hwgroup_t *);
- typedef int (ide_ioctl_proc)(ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long);
- typedef int (ide_open_proc)(struct inode *, struct file *, ide_drive_t *);
- typedef void (ide_release_proc)(struct inode *, struct file *, ide_drive_t *);
- typedef int (ide_check_media_change_proc)(ide_drive_t *);
- typedef void (ide_revalidate_proc)(ide_drive_t *);
- typedef void (ide_pre_reset_proc)(ide_drive_t *);
- typedef unsigned long (ide_capacity_proc)(ide_drive_t *);
- typedef ide_startstop_t (ide_special_proc)(ide_drive_t *);
- typedef void (ide_setting_proc)(ide_drive_t *);
- typedef int (ide_driver_reinit_proc)(ide_drive_t *);
- typedef struct ide_driver_s {
- const char *name;
- const char *version;
- byte media;
- unsigned busy : 1;
- unsigned supports_dma : 1;
- unsigned supports_dsc_overlap : 1;
- ide_cleanup_proc *cleanup;
- ide_do_request_proc *do_request;
- ide_end_request_proc *end_request;
- ide_ioctl_proc *ioctl;
- ide_open_proc *open;
- ide_release_proc *release;
- ide_check_media_change_proc *media_change;
- ide_revalidate_proc *revalidate;
- ide_pre_reset_proc *pre_reset;
- ide_capacity_proc *capacity;
- ide_special_proc *special;
- ide_proc_entry_t *proc;
- ide_driver_reinit_proc *driver_reinit;
- } ide_driver_t;
- #define DRIVER(drive) ((ide_driver_t *)((drive)->driver))
- /*
- * IDE modules.
- */
- #define IDE_CHIPSET_MODULE 0 /* not supported yet */
- #define IDE_PROBE_MODULE 1
- #define IDE_DRIVER_MODULE 2
- typedef int (ide_module_init_proc)(void);
- typedef struct ide_module_s {
- int type;
- ide_module_init_proc *init;
- void *info;
- struct ide_module_s *next;
- } ide_module_t;
- /*
- * ide_hwifs[] is the master data structure used to keep track
- * of just about everything in ide.c. Whenever possible, routines
- * should be using pointers to a drive (ide_drive_t *) or
- * pointers to a hwif (ide_hwif_t *), rather than indexing this
- * structure directly (the allocation/layout may change!).
- *
- */
- #ifndef _IDE_C
- extern ide_hwif_t ide_hwifs[]; /* master data repository */
- extern ide_module_t *ide_modules;
- extern ide_module_t *ide_probe;
- #endif
- extern int noautodma;
- /*
- * We need blk.h, but we replace its end_request by our own version.
- */
- #define IDE_DRIVER /* Toggle some magic bits in blk.h */
- #define LOCAL_END_REQUEST /* Don't generate end_request in blk.h */
- #include <linux/blk.h>
- void ide_end_request(byte uptodate, ide_hwgroup_t *hwgroup);
- /*
- * This is used for (nearly) all data transfers from/to the IDE interface
- * FIXME for 2.5, to a pointer pass verses memcpy........
- */
- void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
- void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount);
- /*
- * This is used for (nearly) all ATAPI data transfers from/to the IDE interface
- * FIXME for 2.5, to a pointer pass verses memcpy........
- */
- 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, ide_expiry_t *expiry);
- /*
- * 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 caller should return immediately after invoking this.
- */
- ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
- /*
- * Issue a simple drive command
- * The drive must be selected beforehand.
- */
- void ide_cmd(ide_drive_t *drive, byte cmd, byte nsect, ide_handler_t *handler);
- /*
- * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
- * removing leading/trailing blanks and compressing internal blanks.
- * It is primarily used to tidy up the model name/number fields as
- * returned by the WIN_[P]IDENTIFY commands.
- */
- void ide_fixstring (byte *s, const int bytecount, const int byteswap);
- /*
- * This routine busy-waits for the drive status to be not "busy".
- * It then checks the status for all of the "good" bits and none
- * of the "bad" bits, and if all is okay it returns 0. All other
- * cases return 1 after 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;
- */
- int ide_wait_stat (ide_startstop_t *startstop, ide_drive_t *drive, byte good, byte bad, unsigned long timeout);
- int ide_wait_noerr (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.
- */
- int ide_xlate_1024 (kdev_t, int, int, const char *);
- /*
- * Convert kdev_t structure into ide_drive_t * one.
- */
- ide_drive_t *get_info_ptr (kdev_t i_rdev);
- /*
- * Return the current idea about the total capacity of this drive.
- */
- unsigned long current_capacity (ide_drive_t *drive);
- /*
- * Start a reset operation for an IDE interface.
- * The caller should return immediately after invoking this.
- */
- ide_startstop_t ide_do_reset (ide_drive_t *);
- /*
- * Re-Start an operation for an IDE interface.
- * The caller should return immediately after invoking this.
- */
- ide_startstop_t restart_request (ide_drive_t *);
- /*
- * This function is intended to be used prior to invoking ide_do_drive_cmd().
- */
- void ide_init_drive_cmd (struct request *rq);
- /*
- * "action" parameter type for ide_do_drive_cmd() below.
- */
- typedef enum {
- ide_wait, /* insert rq at end of list, and wait for it */
- ide_next, /* insert rq immediately after current request */
- ide_preempt, /* insert rq in front of current request */
- ide_end /* insert rq at end of list, but don't wait for it */
- } ide_action_t;
- /*
- * This function issues a special IDE device request
- * onto the request queue.
- *
- * If action is ide_wait, then the rq is queued at the end of the
- * request queue, and the function sleeps until it has been processed.
- * This is for use when invoked from an ioctl handler.
- *
- * If action is ide_preempt, then the rq is queued at the head of
- * the request queue, displacing the currently-being-processed
- * request and this function returns immediately without waiting
- * for the new rq to be completed. This is VERY DANGEROUS, and is
- * intended for careful use by the ATAPI tape/cdrom driver code.
- *
- * If action is ide_next, then the rq is queued immediately after
- * the currently-being-processed-request (if any), and the function
- * returns without waiting for the new rq to be completed. As above,
- * This is VERY DANGEROUS, and is intended for careful use by the
- * ATAPI tape/cdrom driver code.
- *
- * If action is ide_end, then the rq is queued at the end of the
- * request queue, and the function returns immediately without waiting
- * for the new rq to be completed. This is again intended for careful
- * use by the ATAPI tape/cdrom driver code.
- */
- int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action);
- /*
- * Clean up after success/failure of an explicit drive cmd.
- * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD).
- */
- void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err);
- /*
- * Issue ATA command and wait for completion.
- */
- int ide_wait_cmd (ide_drive_t *drive, int cmd, int nsect, int feature, int sectors, byte *buf);
- int ide_wait_cmd_task (ide_drive_t *drive, byte *buf);
- void ide_delay_50ms (void);
- int system_bus_clock(void);
- byte ide_auto_reduce_xfer (ide_drive_t *drive);
- int ide_driveid_update (ide_drive_t *drive);
- int ide_ata66_check (ide_drive_t *drive, byte cmd, byte nsect, byte feature);
- int ide_config_drive_speed (ide_drive_t *drive, byte speed);
- byte eighty_ninty_three (ide_drive_t *drive);
- int set_transfer (ide_drive_t *drive, byte cmd, byte nsect, byte feature);
- /*
- * 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.
- */
- int ide_multwrite (ide_drive_t *drive, unsigned int mcount);
- /*
- * ide_stall_queue() can be used by a drive to give excess bandwidth back
- * to the hwgroup by sleeping for timeout jiffies.
- */
- void ide_stall_queue (ide_drive_t *drive, unsigned long timeout);
- /*
- * ide_get_queue() returns the queue which corresponds to a given device.
- */
- request_queue_t *ide_get_queue (kdev_t dev);
- /*
- * CompactFlash cards and their brethern pretend to be removable hard disks,
- * but they never have a slave unit, and they don't have doorlock mechanisms.
- * This test catches them, and is invoked elsewhere when setting appropriate config bits.
- */
- int drive_is_flashcard (ide_drive_t *drive);
- int ide_spin_wait_hwgroup (ide_drive_t *drive);
- void ide_timer_expiry (unsigned long data);
- void ide_intr (int irq, void *dev_id, struct pt_regs *regs);
- void do_ide_request (request_queue_t * q);
- void ide_init_subdrivers (void);
- #ifndef _IDE_C
- extern struct block_device_operations ide_fops[];
- extern ide_proc_entry_t generic_subdriver_entries[];
- #endif
- #ifdef _IDE_C
- #ifdef CONFIG_BLK_DEV_IDE
- int ideprobe_init (void);
- #endif /* CONFIG_BLK_DEV_IDE */
- #ifdef CONFIG_BLK_DEV_IDEDISK
- int idedisk_init (void);
- #endif /* CONFIG_BLK_DEV_IDEDISK */
- #ifdef CONFIG_BLK_DEV_IDECD
- int ide_cdrom_init (void);
- #endif /* CONFIG_BLK_DEV_IDECD */
- #ifdef CONFIG_BLK_DEV_IDETAPE
- int idetape_init (void);
- #endif /* CONFIG_BLK_DEV_IDETAPE */
- #ifdef CONFIG_BLK_DEV_IDEFLOPPY
- int idefloppy_init (void);
- #endif /* CONFIG_BLK_DEV_IDEFLOPPY */
- #ifdef CONFIG_BLK_DEV_IDESCSI
- int idescsi_init (void);
- #endif /* CONFIG_BLK_DEV_IDESCSI */
- #endif /* _IDE_C */
- int ide_register_module (ide_module_t *module);
- void ide_unregister_module (ide_module_t *module);
- ide_drive_t *ide_scan_devices (byte media, const char *name, ide_driver_t *driver, int n);
- int ide_register_subdriver (ide_drive_t *drive, ide_driver_t *driver, int version);
- int ide_unregister_subdriver (ide_drive_t *drive);
- int ide_replace_subdriver(ide_drive_t *drive, const char *driver);
- #ifdef CONFIG_BLK_DEV_IDEPCI
- #define ON_BOARD 1
- #define NEVER_BOARD 0
- #ifdef CONFIG_BLK_DEV_OFFBOARD
- # define OFF_BOARD ON_BOARD
- #else /* CONFIG_BLK_DEV_OFFBOARD */
- # define OFF_BOARD NEVER_BOARD
- #endif /* CONFIG_BLK_DEV_OFFBOARD */
- unsigned long ide_find_free_region (unsigned short size) __init;
- void ide_scan_pcibus (int scan_direction) __init;
- #endif
- #ifdef CONFIG_BLK_DEV_IDEDMA
- #define BAD_DMA_DRIVE 0
- #define GOOD_DMA_DRIVE 1
- int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func);
- void ide_destroy_dmatable (ide_drive_t *drive);
- ide_startstop_t ide_dma_intr (ide_drive_t *drive);
- int check_drive_lists (ide_drive_t *drive, int good_bad);
- int report_drive_dmaing (ide_drive_t *drive);
- int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive);
- int ide_release_dma (ide_hwif_t *hwif);
- void ide_setup_dma (ide_hwif_t *hwif, unsigned long dmabase, unsigned int num_ports) __init;
- unsigned long ide_get_or_set_dma_base (ide_hwif_t *hwif, int extra, const char *name) __init;
- #endif
- void hwif_unregister (ide_hwif_t *hwif);
- #endif /* _IDE_H */