#ifndef _IDE_H #define _IDE_H /* * linux/include/linux/ide.h * * Copyright (C) 1994-1998 Linus Torvalds & authors */ #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 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< (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=%d\n", __FILE__, __FUNCTION__, (lineno)) /* * 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 /* * 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 */ 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 /* * 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 } hwif_chipset_t; #define IDE_CHIPSET_PCI_MASK \ ((1<> (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 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 */