#ifndef _IDE_H #define _IDE_H /* * linux/include/linux/ide.h * * Copyright (C) 1994-2002 Linus Torvalds & authors */ #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_BLK_DEV_IDEACPI #include #endif #include #include #include #include #if defined(CONFIG_CRIS) || defined(CONFIG_FRV) # define SUPPORT_VLB_SYNC 0 #else # define SUPPORT_VLB_SYNC 1 #endif /* * Used to indicate "no IRQ", should be a value that cannot be an IRQ * number. */ #define IDE_NO_IRQ (-1) typedef unsigned char byte; /* used everywhere */ /* * Probably not wise to fiddle with these */ #define ERROR_MAX 8 /* Max read/write errors per sector */ #define ERROR_RESET 3 /* Reset controller every 4th retry */ #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ /* * Tune flags */ #define IDE_TUNE_NOAUTO 2 #define IDE_TUNE_AUTO 1 #define IDE_TUNE_DEFAULT 0 /* * state flags */ #define DMA_PIO_RETRY 1 /* retrying in PIO */ #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_ALTSTATUS_OFFSET IDE_CONTROL_OFFSET #define IDE_IREASON_OFFSET IDE_NSECTOR_OFFSET #define IDE_BCOUNTL_OFFSET IDE_LCYL_OFFSET #define IDE_BCOUNTH_OFFSET IDE_HCYL_OFFSET #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 BAD_CRC (ABRT_ERR | ICRC_ERR) #define SATA_NR_PORTS (3) /* 16 possible ?? */ #define SATA_STATUS_OFFSET (0) #define SATA_ERROR_OFFSET (1) #define SATA_CONTROL_OFFSET (2) /* * Our Physical Region Descriptor (PRD) table should be large enough * to handle the biggest I/O request we are likely to see. Since requests * can have no more than 256 sectors, and since the typical blocksize is * two or more sectors, we could get by with a limit of 128 entries here for * the usual worst case. Most requests seem to include some contiguous blocks, * further reducing the number of table entries required. * * The driver reverts to PIO mode for individual requests that exceed * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling * 100% of all crazy scenarios here is not necessary. * * As it turns out though, we must allocate a full 4KB page for this, * so the two PRD tables (ide0 & ide1) will each get half of that, * allowing each to have about 256 entries (8 bytes each) from this. */ #define PRD_BYTES 8 #define PRD_ENTRIES 256 /* * Some more useful definitions */ #define PARTN_BITS 6 /* number of minor dev bits for partitions */ #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */ #define SECTOR_SIZE 512 #define SECTOR_WORDS (SECTOR_SIZE / 4) /* number of 32bit words per sector */ #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t))) /* * Timeouts for various operations: */ #define WAIT_DRQ (HZ/10) /* 100msec - spec allows up to 20ms */ #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */ #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 */ /* * Check for an interrupt and acknowledge the interrupt status */ struct hwif_s; typedef int (ide_ack_intr_t)(struct hwif_s *); /* * hwif_chipset_t is used to keep track of the specific hardware * chipset used by each IDE interface, if known. */ enum { ide_unknown, ide_generic, ide_pci, ide_cmd640, ide_dtc2278, ide_ali14xx, ide_qd65xx, ide_umc8672, ide_ht6560b, ide_rz1000, ide_trm290, ide_cmd646, ide_cy82c693, ide_4drives, ide_pmac, ide_etrax100, ide_acorn, ide_au1xxx, ide_palm3710 }; typedef u8 hwif_chipset_t; /* * Structure to hold all information about the location of this port */ typedef struct hw_regs_s { unsigned long io_ports[IDE_NR_PORTS]; /* task file registers */ int irq; /* our irq number */ ide_ack_intr_t *ack_intr; /* acknowledge interrupt */ hwif_chipset_t chipset; struct device *dev; } hw_regs_t; void ide_init_port_data(struct hwif_s *, unsigned int); void ide_init_port_hw(struct hwif_s *, hw_regs_t *); static inline void ide_std_init_ports(hw_regs_t *hw, unsigned long io_addr, unsigned long ctl_addr) { unsigned int i; for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) hw->io_ports[i] = io_addr++; hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr; } #include #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED) #undef MAX_HWIFS #define MAX_HWIFS CONFIG_IDE_MAX_HWIFS #endif /* Currently only m68k, apus and m8xx need it */ #ifndef IDE_ARCH_ACK_INTR # define ide_ack_intr(hwif) (1) #endif /* Currently only Atari needs it */ #ifndef IDE_ARCH_LOCK # define ide_release_lock() do {} while (0) # define ide_get_lock(hdlr, data) do {} while (0) #endif /* IDE_ARCH_LOCK */ /* * Now for the data we need to maintain per-drive: ide_drive_t */ #define ide_scsi 0x21 #define ide_disk 0x20 #define ide_optical 0x7 #define ide_cdrom 0x5 #define ide_tape 0x1 #define ide_floppy 0x0 /* * Special Driver Flags * * set_geometry : respecify drive geometry * recalibrate : seek to cyl 0 * set_multmode : set multmode count * set_tune : tune interface for drive * serviced : service command * reserved : unused */ typedef union { unsigned all : 8; struct { unsigned set_geometry : 1; unsigned recalibrate : 1; unsigned set_multmode : 1; unsigned set_tune : 1; unsigned serviced : 1; unsigned reserved : 3; } b; } special_t; /* * ATA-IDE Select Register, aka Device-Head * * head : always zeros here * unit : drive select number: 0/1 * bit5 : always 1 * lba : using LBA instead of CHS * bit7 : always 1 */ typedef union { unsigned all : 8; struct { #if defined(__LITTLE_ENDIAN_BITFIELD) unsigned head : 4; unsigned unit : 1; unsigned bit5 : 1; unsigned lba : 1; unsigned bit7 : 1; #elif defined(__BIG_ENDIAN_BITFIELD) unsigned bit7 : 1; unsigned lba : 1; unsigned bit5 : 1; unsigned unit : 1; unsigned head : 4; #else #error "Please fix " #endif } b; } select_t, ata_select_t; /* * Status returned from various ide_ functions */ typedef enum { ide_stopped, /* no drive operation was started */ ide_started, /* a drive operation was started, handler was set */ } ide_startstop_t; struct ide_driver_s; struct ide_settings_s; #ifdef CONFIG_BLK_DEV_IDEACPI struct ide_acpi_drive_link; struct ide_acpi_hwif_link; #endif typedef struct ide_drive_s { char name[4]; /* drive name, such as "hda" */ char driver_req[10]; /* requests specific driver */ struct request_queue *queue; /* request queue */ struct request *rq; /* current request */ struct ide_drive_s *next; /* circular list of hwgroup drives */ void *driver_data; /* extra driver data */ struct hd_driveid *id; /* drive model identification info */ #ifdef CONFIG_IDE_PROC_FS struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ struct ide_settings_s *settings;/* /proc/ide/ drive settings */ #endif struct hwif_s *hwif; /* actually (ide_hwif_t *) */ unsigned long sleep; /* sleep until this time */ unsigned long service_start; /* time we started last request */ unsigned long service_time; /* service time of last request */ unsigned long timeout; /* max time to wait for irq */ special_t special; /* special action flags */ select_t select; /* basic drive/head select reg value */ u8 keep_settings; /* restore settings after drive reset */ u8 using_dma; /* disk is using dma for read/write */ u8 retry_pio; /* retrying dma capable host in pio */ u8 state; /* retry state */ u8 waiting_for_dma; /* dma currently in progress */ u8 unmask; /* okay to unmask other irqs */ u8 noflush; /* don't attempt flushes */ u8 dsc_overlap; /* DSC overlap */ u8 nice1; /* give potential excess bandwidth */ unsigned present : 1; /* drive is physically present */ unsigned dead : 1; /* device ejected hint */ unsigned id_read : 1; /* 1=id read from disk 0 = synthetic */ unsigned noprobe : 1; /* from: hdx=noprobe */ unsigned removable : 1; /* 1 if need to do check_media_change */ unsigned attach : 1; /* needed for removable devices */ unsigned 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 atapi_overlap : 1; /* ATAPI overlap (not supported) */ unsigned doorlocking : 1; /* for removable only: door lock/unlock works */ unsigned nodma : 1; /* disallow DMA */ unsigned autotune : 2; /* 0=default, 1=autotune, 2=noautotune */ unsigned remap_0_to_1 : 1; /* 0=noremap, 1=remap 0->1 (for EZDrive) */ unsigned blocked : 1; /* 1=powermanagment told us not to do anything, so sleep nicely */ unsigned vdma : 1; /* 1=doing PIO over DMA 0=doing normal DMA */ unsigned scsi : 1; /* 0=default, 1=ide-scsi emulation */ unsigned sleeping : 1; /* 1=sleeping & sleep field valid */ unsigned post_reset : 1; unsigned udma33_warned : 1; u8 addressing; /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */ u8 quirk_list; /* considered quirky, set for a specific host */ u8 init_speed; /* transfer rate set at boot */ u8 current_speed; /* current transfer rate set */ u8 desired_speed; /* desired transfer rate set */ u8 dn; /* now wide spread use */ u8 wcache; /* status of write cache */ u8 acoustic; /* acoustic management */ u8 media; /* disk, cdrom, tape, floppy, ... */ u8 ctl; /* "normal" value for Control register */ u8 ready_stat; /* min status value for drive ready */ u8 mult_count; /* current multiple sector setting */ u8 mult_req; /* requested multiple sector setting */ u8 tune_req; /* requested drive tuning setting */ u8 io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ u8 bad_wstat; /* used for ignoring WRERR_STAT */ u8 nowerr; /* used for ignoring WRERR_STAT */ u8 sect0; /* offset of first sector for DM6:DDO */ u8 head; /* "real" number of heads */ u8 sect; /* "real" sectors per track */ u8 bios_head; /* BIOS/fdisk/LILO number of heads */ u8 bios_sect; /* BIOS/fdisk/LILO sectors per track */ unsigned int bios_cyl; /* BIOS/fdisk/LILO number of cyls */ unsigned int cyl; /* "real" number of cyls */ unsigned int drive_data; /* used by set_pio_mode/selectproc */ unsigned int failures; /* current failure count */ unsigned int max_failures; /* maximum allowed failure count */ u64 probed_capacity;/* initial reported media capacity (ide-cd only currently) */ u64 capacity64; /* total number of sectors */ int lun; /* logical unit */ int crc_count; /* crc counter to reduce drive speed */ #ifdef CONFIG_BLK_DEV_IDEACPI struct ide_acpi_drive_link *acpidata; #endif struct list_head list; struct device gendev; struct completion gendev_rel_comp; /* to deal with device release() */ } ide_drive_t; #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev) #define IDE_CHIPSET_PCI_MASK \ ((1<> (c)) & 1) struct ide_port_info; struct ide_port_ops { /* host specific initialization of devices on a port */ void (*port_init_devs)(struct hwif_s *); /* routine to program host for PIO mode */ void (*set_pio_mode)(ide_drive_t *, const u8); /* routine to program host for DMA mode */ void (*set_dma_mode)(ide_drive_t *, const u8); /* tweaks hardware to select drive */ void (*selectproc)(ide_drive_t *); /* chipset polling based on hba specifics */ int (*reset_poll)(ide_drive_t *); /* chipset specific changes to default for device-hba resets */ void (*pre_reset)(ide_drive_t *); /* routine to reset controller after a disk reset */ void (*resetproc)(ide_drive_t *); /* special host masking for drive selection */ void (*maskproc)(ide_drive_t *, int); /* check host's drive quirk list */ void (*quirkproc)(ide_drive_t *); u8 (*mdma_filter)(ide_drive_t *); u8 (*udma_filter)(ide_drive_t *); u8 (*cable_detect)(struct hwif_s *); }; struct ide_dma_ops { void (*dma_host_set)(struct ide_drive_s *, int); int (*dma_setup)(struct ide_drive_s *); void (*dma_exec_cmd)(struct ide_drive_s *, u8); void (*dma_start)(struct ide_drive_s *); int (*dma_end)(struct ide_drive_s *); int (*dma_test_irq)(struct ide_drive_s *); void (*dma_lost_irq)(struct ide_drive_s *); void (*dma_timeout)(struct ide_drive_s *); }; typedef struct hwif_s { struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ struct hwif_s *mate; /* other hwif from same PCI chip */ struct hwgroup_s *hwgroup; /* actually (ide_hwgroup_t *) */ struct proc_dir_entry *proc; /* /proc/ide/ directory entry */ char name[6]; /* name of interface, eg. "ide0" */ /* task file registers for pata and sata */ unsigned long io_ports[IDE_NR_PORTS]; unsigned long sata_scr[SATA_NR_PORTS]; ide_drive_t drives[MAX_DRIVES]; /* drive info */ u8 major; /* our major number */ u8 index; /* 0 for ide0; 1 for ide1; ... */ u8 channel; /* for dual-port chips: 0=primary, 1=secondary */ u8 bus_state; /* power state of the IDE bus */ u32 host_flags; u8 pio_mask; u8 ultra_mask; u8 mwdma_mask; u8 swdma_mask; u8 cbl; /* cable type */ hwif_chipset_t chipset; /* sub-module for tuning.. */ struct device *dev; ide_ack_intr_t *ack_intr; void (*rw_disk)(ide_drive_t *, struct request *); const struct ide_port_ops *port_ops; const struct ide_dma_ops *dma_ops; void (*ata_input_data)(ide_drive_t *, void *, u32); void (*ata_output_data)(ide_drive_t *, void *, u32); void (*atapi_input_bytes)(ide_drive_t *, void *, u32); void (*atapi_output_bytes)(ide_drive_t *, void *, u32); void (*ide_dma_clear_irq)(ide_drive_t *drive); void (*OUTB)(u8 addr, unsigned long port); void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port); void (*OUTW)(u16 addr, unsigned long port); void (*OUTSW)(unsigned long port, void *addr, u32 count); void (*OUTSL)(unsigned long port, void *addr, u32 count); u8 (*INB)(unsigned long port); u16 (*INW)(unsigned long port); void (*INSW)(unsigned long port, void *addr, u32 count); void (*INSL)(unsigned long port, void *addr, u32 count); /* dma physical region descriptor table (cpu view) */ unsigned int *dmatable_cpu; /* dma physical region descriptor table (dma view) */ dma_addr_t dmatable_dma; /* Scatter-gather list used to build the above */ struct scatterlist *sg_table; int sg_max_nents; /* Maximum number of entries in it */ int sg_nents; /* Current number of entries in it */ int sg_dma_direction; /* dma transfer direction */ /* data phase of the active command (currently only valid for PIO/DMA) */ int data_phase; unsigned int nsect; unsigned int nleft; struct scatterlist *cursg; unsigned int cursg_ofs; int rqsize; /* max sectors per request */ int irq; /* our irq number */ unsigned long dma_base; /* base addr for dma ports */ unsigned long dma_command; /* dma command register */ unsigned long dma_vendor1; /* dma vendor 1 register */ unsigned long dma_status; /* dma status register */ unsigned long dma_vendor3; /* dma vendor 3 register */ unsigned long dma_prdtable; /* actual prd table address */ unsigned long config_data; /* for use by chipset-specific code */ unsigned long select_data; /* for use by chipset-specific code */ unsigned long extra_base; /* extra addr for dma ports */ unsigned extra_ports; /* number of extra dma ports */ unsigned present : 1; /* this interface exists */ unsigned serialized : 1; /* serialized all channel operation */ unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */ unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */ unsigned mmio : 1; /* host uses MMIO */ struct device gendev; struct device *portdev; struct completion gendev_rel_comp; /* To deal with device release() */ void *hwif_data; /* extra hwif data */ unsigned dma; #ifdef CONFIG_BLK_DEV_IDEACPI struct ide_acpi_hwif_link *acpidata; #endif } ____cacheline_internodealigned_in_smp ide_hwif_t; /* * internal ide interrupt handler type */ typedef ide_startstop_t (ide_handler_t)(ide_drive_t *); typedef int (ide_expiry_t)(ide_drive_t *); /* used by ide-cd, ide-floppy, etc. */ typedef void (xfer_func_t)(ide_drive_t *, void *, u32); typedef struct hwgroup_s { /* irq handler, if active */ ide_startstop_t (*handler)(ide_drive_t *); /* BOOL: protects all fields below */ volatile int busy; /* BOOL: wake us up on timer expiry */ unsigned int sleeping : 1; /* BOOL: polling active & poll_timeout field valid */ unsigned int polling : 1; /* BOOL: in a polling reset situation. Must not trigger another reset yet */ unsigned int resetting : 1; /* current drive */ ide_drive_t *drive; /* ptr to current hwif in linked-list */ ide_hwif_t *hwif; /* current request */ struct request *rq; /* failsafe timer */ struct timer_list timer; /* timeout value during long polls */ unsigned long poll_timeout; /* queried upon timeouts */ int (*expiry)(ide_drive_t *); int req_gen; int req_gen_timer; } ide_hwgroup_t; typedef struct ide_driver_s ide_driver_t; extern struct mutex ide_setting_mtx; int set_io_32bit(ide_drive_t *, int); int set_pio_mode(ide_drive_t *, int); int set_using_dma(ide_drive_t *, int); /* ATAPI packet command flags */ enum { /* set when an error is considered normal - no retry (ide-tape) */ PC_FLAG_ABORT = (1 << 0), PC_FLAG_SUPPRESS_ERROR = (1 << 1), PC_FLAG_WAIT_FOR_DSC = (1 << 2), PC_FLAG_DMA_OK = (1 << 3), PC_FLAG_DMA_RECOMMENDED = (1 << 4), PC_FLAG_DMA_IN_PROGRESS = (1 << 5), PC_FLAG_DMA_ERROR = (1 << 6), PC_FLAG_WRITING = (1 << 7), /* command timed out */ PC_FLAG_TIMEDOUT = (1 << 8), }; struct ide_atapi_pc { /* actual packet bytes */ u8 c[12]; /* incremented on each retry */ int retries; int error; /* bytes to transfer */ int req_xfer; /* bytes actually transferred */ int xferred; /* data buffer */ u8 *buf; /* current buffer position */ u8 *cur_pos; int buf_size; /* missing/available data on the current buffer */ int b_count; /* the corresponding request */ struct request *rq; unsigned long flags; /* * those are more or less driver-specific and some of them are subject * to change/removal later. */ u8 pc_buf[256]; void (*idefloppy_callback) (ide_drive_t *); ide_startstop_t (*idetape_callback) (ide_drive_t *); /* idetape only */ struct idetape_bh *bh; char *b_data; /* idescsi only for now */ struct scatterlist *sg; unsigned int sg_cnt; struct scsi_cmnd *scsi_cmd; void (*done) (struct scsi_cmnd *); unsigned long timeout; }; #ifdef CONFIG_IDE_PROC_FS /* * configurable drive settings */ #define TYPE_INT 0 #define TYPE_BYTE 1 #define TYPE_SHORT 2 #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 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; int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set); /* * /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; void proc_ide_create(void); void proc_ide_destroy(void); void ide_proc_register_port(ide_hwif_t *); void ide_proc_port_register_devices(ide_hwif_t *); void ide_proc_unregister_device(ide_drive_t *); void ide_proc_unregister_port(ide_hwif_t *); void ide_proc_register_driver(ide_drive_t *, ide_driver_t *); void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *); void ide_add_generic_settings(ide_drive_t *); read_proc_t proc_ide_read_capacity; read_proc_t proc_ide_read_geometry; #ifdef CONFIG_BLK_DEV_IDEPCI void ide_pci_create_host_proc(const char *, get_info_t *); #endif /* * 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 static inline void proc_ide_create(void) { ; } static inline void proc_ide_destroy(void) { ; } static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; } static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; } static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; } static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; } static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; } static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; } static inline void ide_add_generic_settings(ide_drive_t *drive) { ; } #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0; #endif /* * Power Management step value (rq->pm->pm_step). * * The step value starts at 0 (ide_pm_state_start_suspend) for a * suspend operation or 1000 (ide_pm_state_start_resume) for a * resume operation. * * For each step, the core calls the subdriver start_power_step() first. * This can return: * - ide_stopped : In this case, the core calls us back again unless * step have been set to ide_power_state_completed. * - ide_started : In this case, the channel is left busy until an * async event (interrupt) occurs. * Typically, start_power_step() will issue a taskfile request with * do_rw_taskfile(). * * Upon reception of the interrupt, the core will call complete_power_step() * with the error code if any. This routine should update the step value * and return. It should not start a new request. The core will call * start_power_step for the new step value, unless step have been set to * ide_power_state_completed. * * Subdrivers are expected to define their own additional power * steps from 1..999 for suspend and from 1001..1999 for resume, * other values are reserved for future use. */ enum { ide_pm_state_completed = -1, ide_pm_state_start_suspend = 0, ide_pm_state_start_resume = 1000, }; /* * Subdrivers support. * * The gendriver.owner field should be set to the module owner of this driver. * The gendriver.name field should be set to the name of this driver */ struct ide_driver_s { const char *version; u8 media; unsigned supports_dsc_overlap : 1; ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t); int (*end_request)(ide_drive_t *, int, int); ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8); ide_startstop_t (*abort)(ide_drive_t *, struct request *rq); struct device_driver gen_driver; int (*probe)(ide_drive_t *); void (*remove)(ide_drive_t *); void (*resume)(ide_drive_t *); void (*shutdown)(ide_drive_t *); #ifdef CONFIG_IDE_PROC_FS ide_proc_entry_t *proc; #endif }; #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver) int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long); /* * ide_hwifs[] is the master data structure used to keep track * of just about everything in ide.c. Whenever possible, routines * should be using pointers to a drive (ide_drive_t *) or * pointers to a hwif (ide_hwif_t *), rather than indexing this * structure directly (the allocation/layout may change!). * */ #ifndef _IDE_C extern ide_hwif_t ide_hwifs[]; /* master data repository */ #endif extern int noautodma; ide_hwif_t *ide_find_port_slot(const struct ide_port_info *); static inline ide_hwif_t *ide_find_port(void) { return ide_find_port_slot(NULL); } extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs); int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq, int uptodate, int nr_sectors); extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry); void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int, ide_expiry_t *); ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8); ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat); ide_startstop_t __ide_abort(ide_drive_t *, struct request *); extern ide_startstop_t ide_abort(ide_drive_t *, const char *); extern void ide_fix_driveid(struct hd_driveid *); extern void ide_fixstring(u8 *, const int, const int); int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long); extern ide_startstop_t ide_do_reset (ide_drive_t *); 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_preempt, /* insert rq in front of current request */ ide_head_wait, /* insert rq in front of current request and wait for it */ ide_end /* insert rq at end of list, but don't wait for it */ } ide_action_t; extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t); extern void ide_end_drive_cmd(ide_drive_t *, u8, u8); enum { IDE_TFLAG_LBA48 = (1 << 0), IDE_TFLAG_NO_SELECT_MASK = (1 << 1), IDE_TFLAG_FLAGGED = (1 << 2), IDE_TFLAG_OUT_DATA = (1 << 3), IDE_TFLAG_OUT_HOB_FEATURE = (1 << 4), IDE_TFLAG_OUT_HOB_NSECT = (1 << 5), IDE_TFLAG_OUT_HOB_LBAL = (1 << 6), IDE_TFLAG_OUT_HOB_LBAM = (1 << 7), IDE_TFLAG_OUT_HOB_LBAH = (1 << 8), IDE_TFLAG_OUT_HOB = IDE_TFLAG_OUT_HOB_FEATURE | IDE_TFLAG_OUT_HOB_NSECT | IDE_TFLAG_OUT_HOB_LBAL | IDE_TFLAG_OUT_HOB_LBAM | IDE_TFLAG_OUT_HOB_LBAH, IDE_TFLAG_OUT_FEATURE = (1 << 9), IDE_TFLAG_OUT_NSECT = (1 << 10), IDE_TFLAG_OUT_LBAL = (1 << 11), IDE_TFLAG_OUT_LBAM = (1 << 12), IDE_TFLAG_OUT_LBAH = (1 << 13), IDE_TFLAG_OUT_TF = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL | IDE_TFLAG_OUT_LBAM | IDE_TFLAG_OUT_LBAH, IDE_TFLAG_OUT_DEVICE = (1 << 14), IDE_TFLAG_WRITE = (1 << 15), IDE_TFLAG_FLAGGED_SET_IN_FLAGS = (1 << 16), IDE_TFLAG_IN_DATA = (1 << 17), IDE_TFLAG_CUSTOM_HANDLER = (1 << 18), IDE_TFLAG_DMA_PIO_FALLBACK = (1 << 19), IDE_TFLAG_IN_HOB_FEATURE = (1 << 20), IDE_TFLAG_IN_HOB_NSECT = (1 << 21), IDE_TFLAG_IN_HOB_LBAL = (1 << 22), IDE_TFLAG_IN_HOB_LBAM = (1 << 23), IDE_TFLAG_IN_HOB_LBAH = (1 << 24), IDE_TFLAG_IN_HOB_LBA = IDE_TFLAG_IN_HOB_LBAL | IDE_TFLAG_IN_HOB_LBAM | IDE_TFLAG_IN_HOB_LBAH, IDE_TFLAG_IN_HOB = IDE_TFLAG_IN_HOB_FEATURE | IDE_TFLAG_IN_HOB_NSECT | IDE_TFLAG_IN_HOB_LBA, IDE_TFLAG_IN_NSECT = (1 << 25), IDE_TFLAG_IN_LBAL = (1 << 26), IDE_TFLAG_IN_LBAM = (1 << 27), IDE_TFLAG_IN_LBAH = (1 << 28), IDE_TFLAG_IN_LBA = IDE_TFLAG_IN_LBAL | IDE_TFLAG_IN_LBAM | IDE_TFLAG_IN_LBAH, IDE_TFLAG_IN_TF = IDE_TFLAG_IN_NSECT | IDE_TFLAG_IN_LBA, IDE_TFLAG_IN_DEVICE = (1 << 29), IDE_TFLAG_HOB = IDE_TFLAG_OUT_HOB | IDE_TFLAG_IN_HOB, IDE_TFLAG_TF = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_TF, IDE_TFLAG_DEVICE = IDE_TFLAG_OUT_DEVICE | IDE_TFLAG_IN_DEVICE, /* force 16-bit I/O operations */ IDE_TFLAG_IO_16BIT = (1 << 30), /* ide_task_t was allocated using kmalloc() */ IDE_TFLAG_DYN = (1 << 31), }; struct ide_taskfile { u8 hob_data; /* 0: high data byte (for TASKFILE IOCTL) */ u8 hob_feature; /* 1-5: additional data to support LBA48 */ u8 hob_nsect; u8 hob_lbal; u8 hob_lbam; u8 hob_lbah; u8 data; /* 6: low data byte (for TASKFILE IOCTL) */ union { /*  7: */ u8 error; /* read: error */ u8 feature; /* write: feature */ }; u8 nsect; /* 8: number of sectors */ u8 lbal; /* 9: LBA low */ u8 lbam; /* 10: LBA mid */ u8 lbah; /* 11: LBA high */ u8 device; /* 12: device select */ union { /* 13: */ u8 status; /*  read: status  */ u8 command; /* write: command */ }; }; typedef struct ide_task_s { union { struct ide_taskfile tf; u8 tf_array[14]; }; u32 tf_flags; int data_phase; struct request *rq; /* copy of request */ void *special; /* valid_t generally */ } ide_task_t; void ide_tf_load(ide_drive_t *, ide_task_t *); void ide_tf_read(ide_drive_t *, ide_task_t *); extern void SELECT_DRIVE(ide_drive_t *); extern void SELECT_MASK(ide_drive_t *, int); extern int drive_is_ready(ide_drive_t *); void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8); ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *); void task_end_request(ide_drive_t *, struct request *, u8); int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16); int ide_no_data_taskfile(ide_drive_t *, ide_task_t *); int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long); int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long); int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long); extern int system_bus_clock(void); extern int ide_driveid_update(ide_drive_t *); extern int ide_config_drive_speed(ide_drive_t *, u8); extern u8 eighty_ninty_three (ide_drive_t *); extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *); extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout); extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout); extern int ide_spin_wait_hwgroup(ide_drive_t *); extern void ide_timer_expiry(unsigned long); extern irqreturn_t ide_intr(int irq, void *dev_id); extern void do_ide_request(struct request_queue *); void ide_init_disk(struct gendisk *, ide_drive_t *); #ifdef CONFIG_IDEPCI_PCIBUS_ORDER extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name); #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME) #else #define ide_pci_register_driver(d) pci_register_driver(d) #endif void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *); void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *); #ifdef CONFIG_BLK_DEV_IDEDMA_PCI int ide_pci_set_master(struct pci_dev *, const char *); unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *); int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *); #else static inline int ide_hwif_setup_dma(ide_hwif_t *hwif, const struct ide_port_info *d) { return -EINVAL; } #endif extern void default_hwif_iops(ide_hwif_t *); extern void default_hwif_mmiops(ide_hwif_t *); extern void default_hwif_transport(ide_hwif_t *); typedef struct ide_pci_enablebit_s { u8 reg; /* byte pci reg holding the enable-bit */ u8 mask; /* mask to isolate the enable-bit */ u8 val; /* value of masked reg when "enabled" */ } ide_pci_enablebit_t; enum { /* Uses ISA control ports not PCI ones. */ IDE_HFLAG_ISA_PORTS = (1 << 0), /* single port device */ IDE_HFLAG_SINGLE = (1 << 1), /* don't use legacy PIO blacklist */ IDE_HFLAG_PIO_NO_BLACKLIST = (1 << 2), /* set for the second port of QD65xx */ IDE_HFLAG_QD_2ND_PORT = (1 << 3), /* use PIO8/9 for prefetch off/on */ IDE_HFLAG_ABUSE_PREFETCH = (1 << 4), /* use PIO6/7 for fast-devsel off/on */ IDE_HFLAG_ABUSE_FAST_DEVSEL = (1 << 5), /* use 100-102 and 200-202 PIO values to set DMA modes */ IDE_HFLAG_ABUSE_DMA_MODES = (1 << 6), /* * keep DMA setting when programming PIO mode, may be used only * for hosts which have separate PIO and DMA timings (ie. PMAC) */ IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7), /* program host for the transfer mode after programming device */ IDE_HFLAG_POST_SET_MODE = (1 << 8), /* don't program host/device for the transfer mode ("smart" hosts) */ IDE_HFLAG_NO_SET_MODE = (1 << 9), /* trust BIOS for programming chipset/device for DMA */ IDE_HFLAG_TRUST_BIOS_FOR_DMA = (1 << 10), /* host uses VDMA (tied with IDE_HFLAG_CS5520 for now) */ IDE_HFLAG_VDMA = (1 << 11), /* ATAPI DMA is unsupported */ IDE_HFLAG_NO_ATAPI_DMA = (1 << 12), /* set if host is a "non-bootable" controller */ IDE_HFLAG_NON_BOOTABLE = (1 << 13), /* host doesn't support DMA */ IDE_HFLAG_NO_DMA = (1 << 14), /* check if host is PCI IDE device before allowing DMA */ IDE_HFLAG_NO_AUTODMA = (1 << 15), /* don't autotune PIO */ IDE_HFLAG_NO_AUTOTUNE = (1 << 16), /* host is CS5510/CS5520 */ IDE_HFLAG_CS5520 = IDE_HFLAG_VDMA, /* no LBA48 */ IDE_HFLAG_NO_LBA48 = (1 << 17), /* no LBA48 DMA */ IDE_HFLAG_NO_LBA48_DMA = (1 << 18), /* data FIFO is cleared by an error */ IDE_HFLAG_ERROR_STOPS_FIFO = (1 << 19), /* serialize ports */ IDE_HFLAG_SERIALIZE = (1 << 20), /* use legacy IRQs */ IDE_HFLAG_LEGACY_IRQS = (1 << 21), /* force use of legacy IRQs */ IDE_HFLAG_FORCE_LEGACY_IRQS = (1 << 22), /* limit LBA48 requests to 256 sectors */ IDE_HFLAG_RQSIZE_256 = (1 << 23), /* use 32-bit I/O ops */ IDE_HFLAG_IO_32BIT = (1 << 24), /* unmask IRQs */ IDE_HFLAG_UNMASK_IRQS = (1 << 25), IDE_HFLAG_ABUSE_SET_DMA_MODE = (1 << 26), /* serialize ports if DMA is possible (for sl82c105) */ IDE_HFLAG_SERIALIZE_DMA = (1 << 27), /* force host out of "simplex" mode */ IDE_HFLAG_CLEAR_SIMPLEX = (1 << 28), /* DSC overlap is unsupported */ IDE_HFLAG_NO_DSC = (1 << 29), /* never use 32-bit I/O ops */ IDE_HFLAG_NO_IO_32BIT = (1 << 30), /* never unmask IRQs */ IDE_HFLAG_NO_UNMASK_IRQS = (1 << 31), }; #ifdef CONFIG_BLK_DEV_OFFBOARD # define IDE_HFLAG_OFF_BOARD 0 #else # define IDE_HFLAG_OFF_BOARD IDE_HFLAG_NON_BOOTABLE #endif struct ide_port_info { char *name; unsigned int (*init_chipset)(struct pci_dev *, const char *); void (*init_iops)(ide_hwif_t *); void (*init_hwif)(ide_hwif_t *); int (*init_dma)(ide_hwif_t *, const struct ide_port_info *); const struct ide_port_ops *port_ops; const struct ide_dma_ops *dma_ops; ide_pci_enablebit_t enablebits[2]; hwif_chipset_t chipset; u32 host_flags; u8 pio_mask; u8 swdma_mask; u8 mwdma_mask; u8 udma_mask; }; int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *); int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *); void ide_map_sg(ide_drive_t *, struct request *); void ide_init_sg_cmd(ide_drive_t *, struct request *); #define BAD_DMA_DRIVE 0 #define GOOD_DMA_DRIVE 1 struct drive_list_entry { const char *id_model; const char *id_firmware; }; int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *); #ifdef CONFIG_BLK_DEV_IDEDMA int __ide_dma_bad_drive(ide_drive_t *); int ide_id_dma_bug(ide_drive_t *); u8 ide_find_dma_mode(ide_drive_t *, u8); static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return ide_find_dma_mode(drive, XFER_UDMA_6); } void ide_dma_off_quietly(ide_drive_t *); void ide_dma_off(ide_drive_t *); void ide_dma_on(ide_drive_t *); int ide_set_dma(ide_drive_t *); void ide_check_dma_crc(ide_drive_t *); ide_startstop_t ide_dma_intr(ide_drive_t *); int ide_build_sglist(ide_drive_t *, struct request *); void ide_destroy_dmatable(ide_drive_t *); #ifdef CONFIG_BLK_DEV_IDEDMA_SFF extern int ide_build_dmatable(ide_drive_t *, struct request *); int ide_allocate_dma_engine(ide_hwif_t *); void ide_release_dma_engine(ide_hwif_t *); void ide_setup_dma(ide_hwif_t *, unsigned long); void ide_dma_host_set(ide_drive_t *, int); extern int ide_dma_setup(ide_drive_t *); void ide_dma_exec_cmd(ide_drive_t *, u8); extern void ide_dma_start(ide_drive_t *); extern int __ide_dma_end(ide_drive_t *); int ide_dma_test_irq(ide_drive_t *); extern void ide_dma_lost_irq(ide_drive_t *); extern void ide_dma_timeout(ide_drive_t *); #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */ #else static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; } static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; } static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; } static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; } static inline void ide_dma_off(ide_drive_t *drive) { ; } static inline void ide_dma_on(ide_drive_t *drive) { ; } static inline void ide_dma_verbose(ide_drive_t *drive) { ; } static inline int ide_set_dma(ide_drive_t *drive) { return 1; } static inline void ide_check_dma_crc(ide_drive_t *drive) { ; } #endif /* CONFIG_BLK_DEV_IDEDMA */ #ifndef CONFIG_BLK_DEV_IDEDMA_SFF static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; } #endif #ifdef CONFIG_BLK_DEV_IDEACPI extern int ide_acpi_exec_tfs(ide_drive_t *drive); extern void ide_acpi_get_timing(ide_hwif_t *hwif); extern void ide_acpi_push_timing(ide_hwif_t *hwif); extern void ide_acpi_init(ide_hwif_t *hwif); void ide_acpi_port_init_devices(ide_hwif_t *); extern void ide_acpi_set_state(ide_hwif_t *hwif, int on); #else static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; } static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; } static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; } static inline void ide_acpi_init(ide_hwif_t *hwif) { ; } static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; } static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {} #endif void ide_remove_port_from_hwgroup(ide_hwif_t *); void ide_unregister(unsigned int); void ide_register_region(struct gendisk *); void ide_unregister_region(struct gendisk *); void ide_undecoded_slave(ide_drive_t *); void ide_port_apply_params(ide_hwif_t *); int ide_device_add_all(u8 *idx, const struct ide_port_info *); int ide_device_add(u8 idx[4], const struct ide_port_info *); int ide_legacy_device_add(const struct ide_port_info *, unsigned long); void ide_port_unregister_devices(ide_hwif_t *); void ide_port_scan(ide_hwif_t *); static inline void *ide_get_hwifdata (ide_hwif_t * hwif) { return hwif->hwif_data; } static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data) { hwif->hwif_data = data; } const char *ide_xfer_verbose(u8 mode); extern void ide_toggle_bounce(ide_drive_t *drive, int on); extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate); static inline int ide_dev_has_iordy(struct hd_driveid *id) { return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0; } static inline int ide_dev_is_sata(struct hd_driveid *id) { /* * See if word 93 is 0 AND drive is at least ATA-5 compatible * verifying that word 80 by casting it to a signed type -- * this trick allows us to filter out the reserved values of * 0x0000 and 0xffff along with the earlier ATA revisions... */ if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020) return 1; return 0; } u64 ide_get_lba_addr(struct ide_taskfile *, int); u8 ide_dump_status(ide_drive_t *, const char *, u8); typedef struct ide_pio_timings_s { int setup_time; /* Address setup (ns) minimum */ int active_time; /* Active pulse (ns) minimum */ int cycle_time; /* Cycle time (ns) minimum = */ /* active + recovery (+ setup for some chips) */ } ide_pio_timings_t; unsigned int ide_pio_cycle_time(ide_drive_t *, u8); u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8); extern const ide_pio_timings_t ide_pio_timings[6]; int ide_set_pio_mode(ide_drive_t *, u8); int ide_set_dma_mode(ide_drive_t *, u8); void ide_set_pio(ide_drive_t *, u8); static inline void ide_set_max_pio(ide_drive_t *drive) { ide_set_pio(drive, 255); } extern spinlock_t ide_lock; extern struct mutex ide_cfg_mtx; /* * Structure locking: * * ide_cfg_mtx and ide_lock together protect changes to * ide_hwif_t->{next,hwgroup} * ide_drive_t->next * * ide_hwgroup_t->busy: ide_lock * ide_hwgroup_t->hwif: ide_lock * ide_hwif_t->mate: constant, no locking * ide_drive_t->hwif: constant, no locking */ #define local_irq_set(flags) do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0) extern struct bus_type ide_bus_type; extern struct class *ide_port_class; /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */ #define ide_id_has_flush_cache(id) ((id)->cfs_enable_2 & 0x3000) /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */ #define ide_id_has_flush_cache_ext(id) \ (((id)->cfs_enable_2 & 0x2400) == 0x2400) static inline void ide_dump_identify(u8 *id) { print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0); } static inline int hwif_to_node(ide_hwif_t *hwif) { struct pci_dev *dev = to_pci_dev(hwif->dev); return hwif->dev ? pcibus_to_node(dev->bus) : -1; } static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive) { ide_hwif_t *hwif = HWIF(drive); return &hwif->drives[(drive->dn ^ 1) & 1]; } static inline void ide_set_irq(ide_drive_t *drive, int on) { ide_hwif_t *hwif = drive->hwif; hwif->OUTB(drive->ctl | (on ? 0 : 2), hwif->io_ports[IDE_CONTROL_OFFSET]); } static inline u8 ide_read_status(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); } static inline u8 ide_read_altstatus(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]); } static inline u8 ide_read_error(ide_drive_t *drive) { ide_hwif_t *hwif = drive->hwif; return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]); } /* * Too bad. The drive wants to send us data which we are not ready to accept. * Just throw it away. */ static inline void ide_atapi_discard_data(ide_drive_t *drive, unsigned bcount) { ide_hwif_t *hwif = drive->hwif; /* FIXME: use ->atapi_input_bytes */ while (bcount--) (void)hwif->INB(hwif->io_ports[IDE_DATA_OFFSET]); } static inline void ide_atapi_write_zeros(ide_drive_t *drive, unsigned bcount) { ide_hwif_t *hwif = drive->hwif; /* FIXME: use ->atapi_output_bytes */ while (bcount--) hwif->OUTB(0, hwif->io_ports[IDE_DATA_OFFSET]); } #endif /* _IDE_H */