#ifndef _IDE_H #define _IDE_H /* * Copyright (C) 1994-2002 Linus Torvalds & authors */ #include #include #include #include #include #include #include #include #include #include #include #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) minor=0; (hdd) 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): */ #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 /* Right now this is only needed by a promise controlled. */ #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 #ifndef DISABLE_IRQ_NOSYNC # define DISABLE_IRQ_NOSYNC 0 #endif /* * "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 */ #define HWGROUP(drive) (drive->channel->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 (drive->channel->io_ports[IDE_DATA_OFFSET]) #define IDE_ERROR_REG (drive->channel->io_ports[IDE_ERROR_OFFSET]) #define IDE_NSECTOR_REG (drive->channel->io_ports[IDE_NSECTOR_OFFSET]) #define IDE_SECTOR_REG (drive->channel->io_ports[IDE_SECTOR_OFFSET]) #define IDE_LCYL_REG (drive->channel->io_ports[IDE_LCYL_OFFSET]) #define IDE_HCYL_REG (drive->channel->io_ports[IDE_HCYL_OFFSET]) #define IDE_SELECT_REG (drive->channel->io_ports[IDE_SELECT_OFFSET]) #define IDE_STATUS_REG (drive->channel->io_ports[IDE_STATUS_OFFSET]) #define IDE_CONTROL_REG (drive->channel->io_ports[IDE_CONTROL_OFFSET]) #define IDE_IRQ_REG (drive->channel->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 GET_FEAT() IN_BYTE(IDE_NSECTOR_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) /* * 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. * * 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)) #define PRD_SEGMENTS 32 /* * 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<selectproc) \ channel->selectproc(drive); \ OUT_BYTE((drive)->select.all, channel->io_ports[IDE_SELECT_OFFSET]); \ } #define SELECT_MASK(channel, drive, mask) \ { \ if (channel->maskproc) \ channel->maskproc(drive,mask); \ } /* * Check for an interrupt and acknowledge the interrupt status */ struct ata_channel; typedef int (ide_ack_intr_t)(struct ata_channel *); #ifndef NO_DMA # define NO_DMA 255 #endif /* * This is used to keep track of the specific hardware chipset used by each IDE * interface, if known. Please note that we don't discriminate between * different PCI host chips here. */ 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_pmac, ide_etrax100 } hwif_chipset_t; #define IDE_CHIPSET_PCI_MASK \ ((1<> (c)) & 1) /* * 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 entry */ ide_ack_intr_t *ack_intr; /* acknowledge interrupt */ hwif_chipset_t chipset; } hw_regs_t; /* * 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 /* * If the arch-dependant ide.h did not declare/define any OUT_BYTE or IN_BYTE * functions, we make some defaults here. The only architecture currently * needing this is Cris. */ #ifndef HAVE_ARCH_IN_OUT # define OUT_BYTE(b,p) outb((b),(p)) # define OUT_WORD(w,p) outw((w),(p)) # define IN_BYTE(p) (u8)inb(p) # define IN_WORD(p) (u16)inw(p) #endif /* * Device types - the nomenclature is analogous to SCSI code. */ #define ATA_DISK 0x20 #define ATA_TAPE 0x01 #define ATA_ROM 0x05 /* CD-ROM */ #define ATA_MOD 0x07 /* optical */ #define ATA_FLOPPY 0x00 #define ATA_SCSI 0x21 #define ATA_NO_LUN 0x7f struct ide_settings_s; /* * ATA/ATAPI device structure : */ typedef struct ata_device { struct ata_channel * channel; char name[6]; /* device name */ unsigned int usage; /* current "open()" count for drive */ char type; /* distingiush different devices: disk, cdrom, tape, floppy, ... */ /* NOTE: If we had proper separation between channel and host chip, we * could move this to the channel and many sync problems would * magically just go away. */ request_queue_t queue; /* per device request queue */ struct ata_device *next; /* circular list of hwgroup drives */ /* Those are directly injected jiffie values. They should go away and * we should use generic timers instead!!! */ unsigned long PADAM_sleep; /* sleep until this time */ unsigned long PADAM_service_start; /* time we started last request */ unsigned long PADAM_service_time; /* service time of last request */ unsigned long PADAM_timeout; /* max time to wait for irq */ /* Flags requesting/indicating one of the following special commands * executed on the request queue. */ #define ATA_SPECIAL_GEOMETRY 0x01 #define ATA_SPECIAL_RECALIBRATE 0x02 #define ATA_SPECIAL_MMODE 0x04 #define ATA_SPECIAL_TUNE 0x08 unsigned char special_cmd; u8 mult_req; /* requested multiple sector setting */ u8 tune_req; /* requested drive tuning setting */ byte using_dma; /* disk is using dma for read/write */ byte retry_pio; /* retrying dma capable host in pio */ byte state; /* retry state */ byte dsc_overlap; /* flag: DSC overlap */ unsigned waiting_for_dma: 1; /* dma currently in progress */ unsigned busy : 1; /* currently doing revalidate_disk() */ unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */ unsigned present : 1; /* drive is physically present */ unsigned noprobe : 1; /* from: hdx=noprobe */ 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 nobios : 1; /* flag: do not probe bios for drive */ unsigned revalidate : 1; /* request revalidation */ unsigned atapi_overlap : 1; /* flag: ATAPI overlap (not supported) */ 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 */ unsigned addressing; /* : 2; 0=28-bit, 1=48-bit, 2=64-bit */ byte scsi; /* 0=default, 1=skip current ide-subdriver for ide-scsi emulation */ 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 bad_wstat; /* used for ignoring WRERR_STAT */ byte nowerr; /* used for ignoring WRERR_STAT */ byte sect0; /* offset of first sector for DM6:DDO */ 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 */ u64 capacity; /* total number of sectors */ unsigned int drive_data; /* for use by tuneproc/selectproc as needed */ 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 */ struct ata_operations *driver; void *driver_data; /* extra driver data */ devfs_handle_t de; /* directory for device */ struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ struct ide_settings_s *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 */ byte wcache; /* status of write cache */ byte acoustic; /* acoustic management */ unsigned int failures; /* current failure count */ unsigned int max_failures; /* maximum allowed failure count */ struct device device; /* global device tree handle */ } 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 *); enum { ATA_PRIMARY = 0, ATA_SECONDARY = 1 }; struct ata_channel { struct device dev; /* device handle */ int unit; /* channel number */ struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */ ide_ioreg_t io_ports[IDE_NR_PORTS]; /* task file registers */ hw_regs_t hw; /* Hardware info */ #ifdef CONFIG_BLK_DEV_IDEPCI struct pci_dev *pci_dev; /* for pci chipsets */ #endif ide_drive_t drives[MAX_DRIVES]; /* drive info */ struct gendisk *gd; /* gendisk structure */ /* * Routines to tune PIO and DMA mode for drives. * * A value of 255 indicates that the function should choose the optimal * mode itself. */ void (*tuneproc) (ide_drive_t *, byte pio); int (*speedproc) (ide_drive_t *, byte pio); /* tweaks hardware to select drive */ void (*selectproc) (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); /* adjust timing based upon rq->cmd direction */ void (*rwproc) (ide_drive_t *, ide_dma_action_t); /* check host's drive quirk list */ int (*quirkproc) (ide_drive_t *); /* CPU-polled transfer routines */ void (*ata_read)(ide_drive_t *, void *, unsigned int); void (*ata_write)(ide_drive_t *, void *, unsigned int); void (*atapi_read)(ide_drive_t *, void *, unsigned int); void (*atapi_write)(ide_drive_t *, void *, unsigned int); 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 */ 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 */ int major; /* our major number */ char name[8]; /* name of interface */ int 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; /* there is a device on this interface */ unsigned serialized : 1; /* serialized operation between channels */ 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 */ unsigned highmem : 1; /* can do full 32-bit dma */ unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */ unsigned no_unmask : 1; /* disallow setting unmask bit */ byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ byte unmask; /* flag: okay to unmask other irqs */ byte slow; /* flag: slow data port */ #if (DISK_RECOVERY_TIME > 0) unsigned long last_time; /* time when previous rq was done */ #endif byte straight8; /* Alan's straight 8 check */ int (*busproc)(ide_drive_t *, int); /* driver soft-power interface */ byte bus_state; /* power state of the IDE bus */ }; /* * Register new hardware with ide */ extern int ide_register_hw(hw_regs_t *hw, struct ata_channel **hwifp); extern void ide_unregister(struct ata_channel *hwif); /* * Status returned by various functions. */ typedef enum { ide_stopped, /* no drive operation was started */ ide_started, /* a drive operation was started, and a handler was set */ ide_released /* started and released bus */ } ide_startstop_t; /* * Interrupt handler types. */ struct ata_taskfile; typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *); 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 *); #define IDE_BUSY 0 /* awaiting an interrupt */ #define IDE_SLEEP 1 #define IDE_DMA 2 /* DMA in progress */ typedef struct hwgroup_s { ide_handler_t *handler; /* irq handler, if active */ unsigned long flags; /* BUSY, SLEEPING */ struct ata_device *drive; /* current drive */ 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; /* 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; 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); 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(struct ata_channel *); 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 /* * This structure describes the operations possible on a particular device type * (CD-ROM, tape, DISK and so on). * * This is the main hook for device type support submodules. */ struct ata_operations { struct module *owner; int (*cleanup)(struct ata_device *); int (*standby)(struct ata_device *); ide_startstop_t (*do_request)(struct ata_device *, struct request *, sector_t); int (*end_request)(struct ata_device *, int); int (*ioctl)(struct ata_device *, struct inode *, struct file *, unsigned int, unsigned long); int (*open)(struct inode *, struct file *, struct ata_device *); void (*release)(struct inode *, struct file *, struct ata_device *); int (*check_media_change)(struct ata_device *); void (*revalidate)(struct ata_device *); void (*pre_reset)(struct ata_device *); sector_t (*capacity)(struct ata_device *); ide_startstop_t (*special)(struct ata_device *); ide_proc_entry_t *proc; }; /* Alas, no aliases. Too much hassle with bringing module.h everywhere */ #define ata_get(ata) \ (((ata) && (ata)->owner) \ ? ( try_inc_mod_count((ata)->owner) ? (ata) : NULL ) \ : (ata)) #define ata_put(ata) \ do { \ if ((ata) && (ata)->owner) \ __MOD_DEC_USE_COUNT((ata)->owner); \ } while(0) extern sector_t ata_capacity(struct ata_device *drive); /* FIXME: Actually implement and use them as soon as possible! to make the * ide_scan_devices() go away! */ extern int unregister_ata_driver(unsigned int type, struct ata_operations *driver); extern int register_ata_driver(unsigned int type, struct ata_operations *driver); #define ata_ops(drive) ((drive)->driver) extern struct ata_channel ide_hwifs[]; /* master data repository */ 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 extern int __ide_end_request(ide_drive_t *drive, int uptodate, int nr_secs); extern int ide_end_request(ide_drive_t *drive, int uptodate); /* * 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); /* * 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(). */ 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_end /* insert rq at end of list, but don't wait for it */ } ide_action_t; /* * temporarily mapping a (possible) highmem bio for PIO transfer */ #define ide_rq_offset(rq) (((rq)->hard_cur_sectors - (rq)->current_nr_sectors) << 9) extern 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. */ void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err); struct ata_taskfile { struct hd_drive_task_hdr taskfile; struct hd_drive_hob_hdr hobfile; int command_type; ide_pre_handler_t *prehandler; ide_handler_t *handler; }; extern void ata_read(ide_drive_t *drive, void *buffer, unsigned int wcount); extern void ata_write(ide_drive_t *drive, void *buffer, unsigned int wcount); extern void atapi_read(ide_drive_t *drive, void *buffer, unsigned int bytecount); extern void atapi_write(ide_drive_t *drive, void *buffer, unsigned int bytecount); extern ide_startstop_t ata_taskfile(ide_drive_t *drive, struct ata_taskfile *args, struct request *rq); /* * Special Flagged Register Validation Caller */ extern ide_startstop_t recal_intr(ide_drive_t *drive); extern ide_startstop_t set_geometry_intr(ide_drive_t *drive); extern ide_startstop_t set_multmode_intr(ide_drive_t *drive); extern ide_startstop_t task_no_data_intr(ide_drive_t *drive); /* This is setting up all fields in args, which depend upon the command type. */ extern void ide_cmd_type_parser(struct ata_taskfile *args); extern int ide_raw_taskfile(struct ata_device *drive, struct ata_taskfile *cmd, byte *buf); extern int ide_cmd_ioctl(struct ata_device *drive, unsigned long arg); void ide_delay_50ms(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, struct ata_taskfile *args); 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, struct ata_taskfile *args); extern int system_bus_speed; /* * idedisk_input_data() is a wrapper around ide_input_data() which copes * with byte-swapping the input data if required. */ extern void idedisk_input_data(ide_drive_t *drive, void *buffer, unsigned int wcount); /* * 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. */ extern int drive_is_flashcard(ide_drive_t *drive); int ide_spin_wait_hwgroup (ide_drive_t *drive); void ide_timer_expiry (unsigned long data); extern void ata_irq_request(int irq, void *data, struct pt_regs *regs); void do_ide_request (request_queue_t * q); void ide_init_subdrivers (void); extern struct block_device_operations ide_fops[]; extern ide_proc_entry_t generic_subdriver_entries[]; #ifdef CONFIG_BLK_DEV_IDE /* Probe for devices attached to the systems host controllers. */ extern int ideprobe_init (void); #endif #ifdef CONFIG_BLK_DEV_IDEDISK extern int idedisk_init (void); #endif #ifdef CONFIG_BLK_DEV_IDECD extern int ide_cdrom_init (void); #endif #ifdef CONFIG_BLK_DEV_IDETAPE extern int idetape_init (void); #endif #ifdef CONFIG_BLK_DEV_IDEFLOPPY extern int idefloppy_init (void); #endif #ifdef CONFIG_BLK_DEV_IDESCSI extern int idescsi_init (void); #endif ide_drive_t *ide_scan_devices (byte media, const char *name, struct ata_operations *driver, int n); extern int ide_register_subdriver(ide_drive_t *drive, struct ata_operations *driver); extern int ide_unregister_subdriver(ide_drive_t *drive); #ifdef CONFIG_BLK_DEV_IDEPCI # define ON_BOARD 1 # define NEVER_BOARD 0 # ifdef CONFIG_BLK_DEV_OFFBOARD # define OFF_BOARD ON_BOARD # else # define OFF_BOARD NEVER_BOARD # endif void __init ide_scan_pcibus(int scan_direction); #endif #ifdef CONFIG_BLK_DEV_IDEDMA 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 ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive); extern void ide_release_dma(struct ata_channel *hwif); extern void ide_setup_dma(struct ata_channel *hwif, unsigned long dmabase, unsigned int num_ports) __init; #endif extern spinlock_t ide_lock; #define DRIVE_LOCK(drive) ((drive)->queue.queue_lock) extern int drive_is_ready(ide_drive_t *drive); extern void revalidate_drives(void); #endif