include/linux/ide.h

   1 #ifndef _IDE_H
   2 #define _IDE_H
   3 /*
   4  *  linux/include/linux/ide.h
   5  *
   6  *  Copyright (C) 1994-2002  Linus Torvalds & authors
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/ioport.h>
  11 #include <linux/hdreg.h>
  12 #include <linux/hdsmart.h>
  13 #include <linux/blkdev.h>
  14 #include <linux/proc_fs.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/bitops.h>
  17 #include <linux/bio.h>
  18 #include <linux/device.h>
  19 #include <linux/pci.h>
  20 #include <linux/completion.h>
  21 #ifdef CONFIG_BLK_DEV_IDEACPI
  22 #include <acpi/acpi.h>
  23 #endif
  24 #include <asm/byteorder.h>
  25 #include <asm/system.h>
  26 #include <asm/io.h>
  27 #include <asm/semaphore.h>
  28 #include <asm/mutex.h>
  29
  30 #if defined(CRIS) || defined(FRV)
  31 # define SUPPORT_VLB_SYNC 0
  32 #else
  33 # define SUPPORT_VLB_SYNC 1
  34 #endif
  35
  36 /*
  37  * Used to indicate "no IRQ", should be a value that cannot be an IRQ
  38  * number.
  39  */
  40
  41 #define IDE_NO_IRQ              (-1)
  42
  43 typedef unsigned char   byte;   /* used everywhere */
  44
  45 /*
  46  * Probably not wise to fiddle with these
  47  */
  48 #define ERROR_MAX       8       /* Max read/write errors per sector */
  49 #define ERROR_RESET     3       /* Reset controller every 4th retry */
  50 #define ERROR_RECAL     1       /* Recalibrate every 2nd retry */
  51
  52 /*
  53  * Tune flags
  54  */
  55 #define IDE_TUNE_NOAUTO         2
  56 #define IDE_TUNE_AUTO           1
  57 #define IDE_TUNE_DEFAULT        0
  58
  59 /*
  60  * state flags
  61  */
  62
  63 #define DMA_PIO_RETRY   1       /* retrying in PIO */
  64
  65 #define HWIF(drive)             ((ide_hwif_t *)((drive)->hwif))
  66 #define HWGROUP(drive)          ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  67
  68 /*
  69  * Definitions for accessing IDE controller registers
  70  */
  71 #define IDE_NR_PORTS            (10)
  72
  73 #define IDE_DATA_OFFSET         (0)
  74 #define IDE_ERROR_OFFSET        (1)
  75 #define IDE_NSECTOR_OFFSET      (2)
  76 #define IDE_SECTOR_OFFSET       (3)
  77 #define IDE_LCYL_OFFSET         (4)
  78 #define IDE_HCYL_OFFSET         (5)
  79 #define IDE_SELECT_OFFSET       (6)
  80 #define IDE_STATUS_OFFSET       (7)
  81 #define IDE_CONTROL_OFFSET      (8)
  82 #define IDE_IRQ_OFFSET          (9)
  83
  84 #define IDE_FEATURE_OFFSET      IDE_ERROR_OFFSET
  85 #define IDE_COMMAND_OFFSET      IDE_STATUS_OFFSET
  86
  87 #define IDE_DATA_REG            (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
  88 #define IDE_ERROR_REG           (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
  89 #define IDE_NSECTOR_REG         (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
  90 #define IDE_SECTOR_REG          (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
  91 #define IDE_LCYL_REG            (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
  92 #define IDE_HCYL_REG            (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
  93 #define IDE_SELECT_REG          (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
  94 #define IDE_STATUS_REG          (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
  95 #define IDE_CONTROL_REG         (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
  96 #define IDE_IRQ_REG             (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
  97
  98 #define IDE_FEATURE_REG         IDE_ERROR_REG
  99 #define IDE_COMMAND_REG         IDE_STATUS_REG
 100 #define IDE_ALTSTATUS_REG       IDE_CONTROL_REG
 101 #define IDE_IREASON_REG         IDE_NSECTOR_REG
 102 #define IDE_BCOUNTL_REG         IDE_LCYL_REG
 103 #define IDE_BCOUNTH_REG         IDE_HCYL_REG
 104
 105 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
 106 #define BAD_R_STAT              (BUSY_STAT   | ERR_STAT)
 107 #define BAD_W_STAT              (BAD_R_STAT  | WRERR_STAT)
 108 #define BAD_STAT                (BAD_R_STAT  | DRQ_STAT)
 109 #define DRIVE_READY             (READY_STAT  | SEEK_STAT)
 110
 111 #define BAD_CRC                 (ABRT_ERR    | ICRC_ERR)
 112
 113 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
 114
 115 #define SATA_STATUS_OFFSET      (0)
 116 #define SATA_STATUS_REG         (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
 117 #define SATA_ERROR_OFFSET       (1)
 118 #define SATA_ERROR_REG          (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
 119 #define SATA_CONTROL_OFFSET     (2)
 120 #define SATA_CONTROL_REG        (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
 121
 122 #define SATA_MISC_OFFSET        (0)
 123 #define SATA_MISC_REG           (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
 124 #define SATA_PHY_OFFSET         (1)
 125 #define SATA_PHY_REG            (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
 126 #define SATA_IEN_OFFSET         (2)
 127 #define SATA_IEN_REG            (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
 128
 129 /*
 130  * Our Physical Region Descriptor (PRD) table should be large enough
 131  * to handle the biggest I/O request we are likely to see.  Since requests
 132  * can have no more than 256 sectors, and since the typical blocksize is
 133  * two or more sectors, we could get by with a limit of 128 entries here for
 134  * the usual worst case.  Most requests seem to include some contiguous blocks,
 135  * further reducing the number of table entries required.
 136  *
 137  * The driver reverts to PIO mode for individual requests that exceed
 138  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 139  * 100% of all crazy scenarios here is not necessary.
 140  *
 141  * As it turns out though, we must allocate a full 4KB page for this,
 142  * so the two PRD tables (ide0 & ide1) will each get half of that,
 143  * allowing each to have about 256 entries (8 bytes each) from this.
 144  */
 145 #define PRD_BYTES       8
 146 #define PRD_ENTRIES     256
 147
 148 /*
 149  * Some more useful definitions
 150  */
 151 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
 152 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
 153 #define SECTOR_SIZE     512
 154 #define SECTOR_WORDS    (SECTOR_SIZE / 4)       /* number of 32bit words per sector */
 155 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
 156
 157 /*
 158  * Timeouts for various operations:
 159  */
 160 #define WAIT_DRQ        (HZ/10)         /* 100msec - spec allows up to 20ms */
 161 #define WAIT_READY      (5*HZ)          /* 5sec - some laptops are very slow */
 162 #define WAIT_PIDENTIFY  (10*HZ) /* 10sec  - should be less than 3ms (?), if all ATAPI CD is closed at boot */
 163 #define WAIT_WORSTCASE  (30*HZ) /* 30sec  - worst case when spinning up */
 164 #define WAIT_CMD        (10*HZ) /* 10sec  - maximum wait for an IRQ to happen */
 165 #define WAIT_MIN_SLEEP  (2*HZ/100)      /* 20msec - minimum sleep time */
 166
 167 /*
 168  * Check for an interrupt and acknowledge the interrupt status
 169  */
 170 struct hwif_s;
 171 typedef int (ide_ack_intr_t)(struct hwif_s *);
 172
 173 /*
 174  * hwif_chipset_t is used to keep track of the specific hardware
 175  * chipset used by each IDE interface, if known.
 176  */
 177 enum {          ide_unknown,    ide_generic,    ide_pci,
 178                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
 179                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
 180                 ide_rz1000,     ide_trm290,
 181                 ide_cmd646,     ide_cy82c693,   ide_4drives,
 182                 ide_pmac,       ide_etrax100,   ide_acorn,
 183                 ide_au1xxx, ide_forced
 184 };
 185
 186 typedef u8 hwif_chipset_t;
 187
 188 /*
 189  * Structure to hold all information about the location of this port
 190  */
 191 typedef struct hw_regs_s {
 192         unsigned long   io_ports[IDE_NR_PORTS]; /* task file registers */
 193         int             irq;                    /* our irq number */
 194         ide_ack_intr_t  *ack_intr;              /* acknowledge interrupt */
 195         hwif_chipset_t  chipset;
 196         struct device   *dev;
 197 } hw_regs_t;
 198
 199 struct hwif_s * ide_find_port(unsigned long);
 200 void ide_init_port_data(struct hwif_s *, unsigned int);
 201 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
 202
 203 struct ide_drive_s;
 204 int ide_register_hw(hw_regs_t *, void (*)(struct ide_drive_s *),
 205                     struct hwif_s **);
 206
 207 void ide_setup_ports(   hw_regs_t *hw,
 208                         unsigned long base,
 209                         int *offsets,
 210                         unsigned long ctrl,
 211                         unsigned long intr,
 212                         ide_ack_intr_t *ack_intr,
 213 #if 0
 214                         ide_io_ops_t *iops,
 215 #endif
 216                         int irq);
 217
 218 static inline void ide_std_init_ports(hw_regs_t *hw,
 219                                       unsigned long io_addr,
 220                                       unsigned long ctl_addr)
 221 {
 222         unsigned int i;
 223
 224         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 225                 hw->io_ports[i] = io_addr++;
 226
 227         hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
 228 }
 229
 230 #include <asm/ide.h>
 231
 232 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
 233 #undef MAX_HWIFS
 234 #define MAX_HWIFS       CONFIG_IDE_MAX_HWIFS
 235 #endif
 236
 237 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
 238 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
 239 # define ide_default_io_base(index)     (0)
 240 # define ide_default_irq(base)          (0)
 241 # define ide_init_default_irq(base)     (0)
 242 #endif
 243
 244 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
 245 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 246                                        unsigned long io_addr,
 247                                        unsigned long ctl_addr,
 248                                        int *irq)
 249 {
 250         if (!ctl_addr)
 251                 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
 252         else
 253                 ide_std_init_ports(hw, io_addr, ctl_addr);
 254
 255         if (irq)
 256                 *irq = 0;
 257
 258         hw->io_ports[IDE_IRQ_OFFSET] = 0;
 259
 260 #ifdef CONFIG_PPC32
 261         if (ppc_ide_md.ide_init_hwif)
 262                 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
 263 #endif
 264 }
 265 #else
 266 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 267                                        unsigned long io_addr,
 268                                        unsigned long ctl_addr,
 269                                        int *irq)
 270 {
 271         if (io_addr || ctl_addr)
 272                 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
 273 }
 274 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
 275
 276 /* Currently only m68k, apus and m8xx need it */
 277 #ifndef IDE_ARCH_ACK_INTR
 278 # define ide_ack_intr(hwif) (1)
 279 #endif
 280
 281 /* Currently only Atari needs it */
 282 #ifndef IDE_ARCH_LOCK
 283 # define ide_release_lock()                     do {} while (0)
 284 # define ide_get_lock(hdlr, data)               do {} while (0)
 285 #endif /* IDE_ARCH_LOCK */
 286
 287 /*
 288  * Now for the data we need to maintain per-drive:  ide_drive_t
 289  */
 290
 291 #define ide_scsi        0x21
 292 #define ide_disk        0x20
 293 #define ide_optical     0x7
 294 #define ide_cdrom       0x5
 295 #define ide_tape        0x1
 296 #define ide_floppy      0x0
 297
 298 /*
 299  * Special Driver Flags
 300  *
 301  * set_geometry : respecify drive geometry
 302  * recalibrate  : seek to cyl 0
 303  * set_multmode : set multmode count
 304  * set_tune     : tune interface for drive
 305  * serviced     : service command
 306  * reserved     : unused
 307  */
 308 typedef union {
 309         unsigned all                    : 8;
 310         struct {
 311                 unsigned set_geometry   : 1;
 312                 unsigned recalibrate    : 1;
 313                 unsigned set_multmode   : 1;
 314                 unsigned set_tune       : 1;
 315                 unsigned serviced       : 1;
 316                 unsigned reserved       : 3;
 317         } b;
 318 } special_t;
 319
 320 /*
 321  * ATA-IDE Select Register, aka Device-Head
 322  *
 323  * head         : always zeros here
 324  * unit         : drive select number: 0/1
 325  * bit5         : always 1
 326  * lba          : using LBA instead of CHS
 327  * bit7         : always 1
 328  */
 329 typedef union {
 330         unsigned all                    : 8;
 331         struct {
 332 #if defined(__LITTLE_ENDIAN_BITFIELD)
 333                 unsigned head           : 4;
 334                 unsigned unit           : 1;
 335                 unsigned bit5           : 1;
 336                 unsigned lba            : 1;
 337                 unsigned bit7           : 1;
 338 #elif defined(__BIG_ENDIAN_BITFIELD)
 339                 unsigned bit7           : 1;
 340                 unsigned lba            : 1;
 341                 unsigned bit5           : 1;
 342                 unsigned unit           : 1;
 343                 unsigned head           : 4;
 344 #else
 345 #error "Please fix <asm/byteorder.h>"
 346 #endif
 347         } b;
 348 } select_t, ata_select_t;
 349
 350 /*
 351  * Status returned from various ide_ functions
 352  */
 353 typedef enum {
 354         ide_stopped,    /* no drive operation was started */
 355         ide_started,    /* a drive operation was started, handler was set */
 356 } ide_startstop_t;
 357
 358 struct ide_driver_s;
 359 struct ide_settings_s;
 360
 361 #ifdef CONFIG_BLK_DEV_IDEACPI
 362 struct ide_acpi_drive_link;
 363 struct ide_acpi_hwif_link;
 364 #endif
 365
 366 typedef struct ide_drive_s {
 367         char            name[4];        /* drive name, such as "hda" */
 368         char            driver_req[10]; /* requests specific driver */
 369
 370         struct request_queue    *queue; /* request queue */
 371
 372         struct request          *rq;    /* current request */
 373         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 374         void            *driver_data;   /* extra driver data */
 375         struct hd_driveid       *id;    /* drive model identification info */
 376 #ifdef CONFIG_IDE_PROC_FS
 377         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 378         struct ide_settings_s *settings;/* /proc/ide/ drive settings */
 379 #endif
 380         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 381
 382         unsigned long sleep;            /* sleep until this time */
 383         unsigned long service_start;    /* time we started last request */
 384         unsigned long service_time;     /* service time of last request */
 385         unsigned long timeout;          /* max time to wait for irq */
 386
 387         special_t       special;        /* special action flags */
 388         select_t        select;         /* basic drive/head select reg value */
 389
 390         u8      keep_settings;          /* restore settings after drive reset */
 391         u8      using_dma;              /* disk is using dma for read/write */
 392         u8      retry_pio;              /* retrying dma capable host in pio */
 393         u8      state;                  /* retry state */
 394         u8      waiting_for_dma;        /* dma currently in progress */
 395         u8      unmask;                 /* okay to unmask other irqs */
 396         u8      noflush;                /* don't attempt flushes */
 397         u8      dsc_overlap;            /* DSC overlap */
 398         u8      nice1;                  /* give potential excess bandwidth */
 399
 400         unsigned present        : 1;    /* drive is physically present */
 401         unsigned dead           : 1;    /* device ejected hint */
 402         unsigned id_read        : 1;    /* 1=id read from disk 0 = synthetic */
 403         unsigned noprobe        : 1;    /* from:  hdx=noprobe */
 404         unsigned removable      : 1;    /* 1 if need to do check_media_change */
 405         unsigned attach         : 1;    /* needed for removable devices */
 406         unsigned forced_geom    : 1;    /* 1 if hdx=c,h,s was given at boot */
 407         unsigned no_unmask      : 1;    /* disallow setting unmask bit */
 408         unsigned no_io_32bit    : 1;    /* disallow enabling 32bit I/O */
 409         unsigned atapi_overlap  : 1;    /* ATAPI overlap (not supported) */
 410         unsigned nice0          : 1;    /* give obvious excess bandwidth */
 411         unsigned nice2          : 1;    /* give a share in our own bandwidth */
 412         unsigned doorlocking    : 1;    /* for removable only: door lock/unlock works */
 413         unsigned nodma          : 1;    /* disallow DMA */
 414         unsigned autotune       : 2;    /* 0=default, 1=autotune, 2=noautotune */
 415         unsigned remap_0_to_1   : 1;    /* 0=noremap, 1=remap 0->1 (for EZDrive) */
 416         unsigned blocked        : 1;    /* 1=powermanagment told us not to do anything, so sleep nicely */
 417         unsigned vdma           : 1;    /* 1=doing PIO over DMA 0=doing normal DMA */
 418         unsigned scsi           : 1;    /* 0=default, 1=ide-scsi emulation */
 419         unsigned sleeping       : 1;    /* 1=sleeping & sleep field valid */
 420         unsigned post_reset     : 1;
 421         unsigned udma33_warned  : 1;
 422
 423         u8      addressing;     /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
 424         u8      quirk_list;     /* considered quirky, set for a specific host */
 425         u8      init_speed;     /* transfer rate set at boot */
 426         u8      current_speed;  /* current transfer rate set */
 427         u8      desired_speed;  /* desired transfer rate set */
 428         u8      dn;             /* now wide spread use */
 429         u8      wcache;         /* status of write cache */
 430         u8      acoustic;       /* acoustic management */
 431         u8      media;          /* disk, cdrom, tape, floppy, ... */
 432         u8      ctl;            /* "normal" value for IDE_CONTROL_REG */
 433         u8      ready_stat;     /* min status value for drive ready */
 434         u8      mult_count;     /* current multiple sector setting */
 435         u8      mult_req;       /* requested multiple sector setting */
 436         u8      tune_req;       /* requested drive tuning setting */
 437         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 438         u8      bad_wstat;      /* used for ignoring WRERR_STAT */
 439         u8      nowerr;         /* used for ignoring WRERR_STAT */
 440         u8      sect0;          /* offset of first sector for DM6:DDO */
 441         u8      head;           /* "real" number of heads */
 442         u8      sect;           /* "real" sectors per track */
 443         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 444         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 445
 446         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 447         unsigned int    cyl;            /* "real" number of cyls */
 448         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 449         unsigned int    failures;       /* current failure count */
 450         unsigned int    max_failures;   /* maximum allowed failure count */
 451         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 452
 453         u64             capacity64;     /* total number of sectors */
 454
 455         int             lun;            /* logical unit */
 456         int             crc_count;      /* crc counter to reduce drive speed */
 457 #ifdef CONFIG_BLK_DEV_IDEACPI
 458         struct ide_acpi_drive_link *acpidata;
 459 #endif
 460         struct list_head list;
 461         struct device   gendev;
 462         struct completion gendev_rel_comp;      /* to deal with device release() */
 463 } ide_drive_t;
 464
 465 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
 466
 467 #define IDE_CHIPSET_PCI_MASK    \
 468     ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
 469 #define IDE_CHIPSET_IS_PCI(c)   ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
 470
 471 struct ide_port_info;
 472
 473 typedef struct hwif_s {
 474         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 475         struct hwif_s *mate;            /* other hwif from same PCI chip */
 476         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 477         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 478
 479         char name[6];                   /* name of interface, eg. "ide0" */
 480
 481                 /* task file registers for pata and sata */
 482         unsigned long   io_ports[IDE_NR_PORTS];
 483         unsigned long   sata_scr[SATA_NR_PORTS];
 484         unsigned long   sata_misc[SATA_NR_PORTS];
 485
 486         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 487
 488         u8 major;       /* our major number */
 489         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 490         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 491         u8 straight8;   /* Alan's straight 8 check */
 492         u8 bus_state;   /* power state of the IDE bus */
 493
 494         u32 host_flags;
 495
 496         u8 pio_mask;
 497
 498         u8 ultra_mask;
 499         u8 mwdma_mask;
 500         u8 swdma_mask;
 501
 502         u8 cbl;         /* cable type */
 503
 504         hwif_chipset_t chipset; /* sub-module for tuning.. */
 505
 506         struct pci_dev  *pci_dev;       /* for pci chipsets */
 507         const struct ide_port_info *cds;        /* chipset device struct */
 508
 509         ide_ack_intr_t *ack_intr;
 510
 511         void (*rw_disk)(ide_drive_t *, struct request *);
 512
 513 #if 0
 514         ide_hwif_ops_t  *hwifops;
 515 #else
 516         /* routine to program host for PIO mode */
 517         void    (*set_pio_mode)(ide_drive_t *, const u8);
 518         /* routine to program host for DMA mode */
 519         void    (*set_dma_mode)(ide_drive_t *, const u8);
 520         /* tweaks hardware to select drive */
 521         void    (*selectproc)(ide_drive_t *);
 522         /* chipset polling based on hba specifics */
 523         int     (*reset_poll)(ide_drive_t *);
 524         /* chipset specific changes to default for device-hba resets */
 525         void    (*pre_reset)(ide_drive_t *);
 526         /* routine to reset controller after a disk reset */
 527         void    (*resetproc)(ide_drive_t *);
 528         /* special host masking for drive selection */
 529         void    (*maskproc)(ide_drive_t *, int);
 530         /* check host's drive quirk list */
 531         void    (*quirkproc)(ide_drive_t *);
 532         /* driver soft-power interface */
 533         int     (*busproc)(ide_drive_t *, int);
 534 #endif
 535         u8 (*mdma_filter)(ide_drive_t *);
 536         u8 (*udma_filter)(ide_drive_t *);
 537
 538         void (*ata_input_data)(ide_drive_t *, void *, u32);
 539         void (*ata_output_data)(ide_drive_t *, void *, u32);
 540
 541         void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
 542         void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
 543
 544         void (*dma_host_set)(ide_drive_t *, int);
 545         int (*dma_setup)(ide_drive_t *);
 546         void (*dma_exec_cmd)(ide_drive_t *, u8);
 547         void (*dma_start)(ide_drive_t *);
 548         int (*ide_dma_end)(ide_drive_t *drive);
 549         int (*ide_dma_test_irq)(ide_drive_t *drive);
 550         void (*ide_dma_clear_irq)(ide_drive_t *drive);
 551         void (*dma_lost_irq)(ide_drive_t *drive);
 552         void (*dma_timeout)(ide_drive_t *drive);
 553
 554         void (*OUTB)(u8 addr, unsigned long port);
 555         void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
 556         void (*OUTW)(u16 addr, unsigned long port);
 557         void (*OUTSW)(unsigned long port, void *addr, u32 count);
 558         void (*OUTSL)(unsigned long port, void *addr, u32 count);
 559
 560         u8  (*INB)(unsigned long port);
 561         u16 (*INW)(unsigned long port);
 562         void (*INSW)(unsigned long port, void *addr, u32 count);
 563         void (*INSL)(unsigned long port, void *addr, u32 count);
 564
 565         /* dma physical region descriptor table (cpu view) */
 566         unsigned int    *dmatable_cpu;
 567         /* dma physical region descriptor table (dma view) */
 568         dma_addr_t      dmatable_dma;
 569         /* Scatter-gather list used to build the above */
 570         struct scatterlist *sg_table;
 571         int sg_max_nents;               /* Maximum number of entries in it */
 572         int sg_nents;                   /* Current number of entries in it */
 573         int sg_dma_direction;           /* dma transfer direction */
 574
 575         /* data phase of the active command (currently only valid for PIO/DMA) */
 576         int             data_phase;
 577
 578         unsigned int nsect;
 579         unsigned int nleft;
 580         struct scatterlist *cursg;
 581         unsigned int cursg_ofs;
 582
 583         int             rqsize;         /* max sectors per request */
 584         int             irq;            /* our irq number */
 585
 586         unsigned long   dma_base;       /* base addr for dma ports */
 587         unsigned long   dma_command;    /* dma command register */
 588         unsigned long   dma_vendor1;    /* dma vendor 1 register */
 589         unsigned long   dma_status;     /* dma status register */
 590         unsigned long   dma_vendor3;    /* dma vendor 3 register */
 591         unsigned long   dma_prdtable;   /* actual prd table address */
 592
 593         unsigned long   config_data;    /* for use by chipset-specific code */
 594         unsigned long   select_data;    /* for use by chipset-specific code */
 595
 596         unsigned long   extra_base;     /* extra addr for dma ports */
 597         unsigned        extra_ports;    /* number of extra dma ports */
 598
 599         unsigned        noprobe    : 1; /* don't probe for this interface */
 600         unsigned        present    : 1; /* this interface exists */
 601         unsigned        hold       : 1; /* this interface is always present */
 602         unsigned        serialized : 1; /* serialized all channel operation */
 603         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 604         unsigned        reset      : 1; /* reset after probe */
 605         unsigned        auto_poll  : 1; /* supports nop auto-poll */
 606         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 607         unsigned        no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
 608         unsigned        mmio       : 1; /* host uses MMIO */
 609
 610         struct device   gendev;
 611         struct completion gendev_rel_comp; /* To deal with device release() */
 612
 613         void            *hwif_data;     /* extra hwif data */
 614
 615         unsigned dma;
 616
 617 #ifdef CONFIG_BLK_DEV_IDEACPI
 618         struct ide_acpi_hwif_link *acpidata;
 619 #endif
 620 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 621
 622 /*
 623  *  internal ide interrupt handler type
 624  */
 625 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 626 typedef int (ide_expiry_t)(ide_drive_t *);
 627
 628 typedef struct hwgroup_s {
 629                 /* irq handler, if active */
 630         ide_startstop_t (*handler)(ide_drive_t *);
 631                 /* irq handler, suspended if active */
 632         ide_startstop_t (*handler_save)(ide_drive_t *);
 633                 /* BOOL: protects all fields below */
 634         volatile int busy;
 635                 /* BOOL: wake us up on timer expiry */
 636         unsigned int sleeping   : 1;
 637                 /* BOOL: polling active & poll_timeout field valid */
 638         unsigned int polling    : 1;
 639                 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
 640         unsigned int resetting  : 1;
 641
 642                 /* current drive */
 643         ide_drive_t *drive;
 644                 /* ptr to current hwif in linked-list */
 645         ide_hwif_t *hwif;
 646
 647                 /* for pci chipsets */
 648         struct pci_dev *pci_dev;
 649
 650                 /* current request */
 651         struct request *rq;
 652                 /* failsafe timer */
 653         struct timer_list timer;
 654                 /* local copy of current write rq */
 655         struct request wrq;
 656                 /* timeout value during long polls */
 657         unsigned long poll_timeout;
 658                 /* queried upon timeouts */
 659         int (*expiry)(ide_drive_t *);
 660                 /* ide_system_bus_speed */
 661         int pio_clock;
 662         int req_gen;
 663         int req_gen_timer;
 664
 665         unsigned char cmd_buf[4];
 666 } ide_hwgroup_t;
 667
 668 typedef struct ide_driver_s ide_driver_t;
 669
 670 extern struct mutex ide_setting_mtx;
 671
 672 int set_io_32bit(ide_drive_t *, int);
 673 int set_pio_mode(ide_drive_t *, int);
 674 int set_using_dma(ide_drive_t *, int);
 675
 676 #ifdef CONFIG_IDE_PROC_FS
 677 /*
 678  * configurable drive settings
 679  */
 680
 681 #define TYPE_INT        0
 682 #define TYPE_BYTE       1
 683 #define TYPE_SHORT      2
 684
 685 #define SETTING_READ    (1 << 0)
 686 #define SETTING_WRITE   (1 << 1)
 687 #define SETTING_RW      (SETTING_READ | SETTING_WRITE)
 688
 689 typedef int (ide_procset_t)(ide_drive_t *, int);
 690 typedef struct ide_settings_s {
 691         char                    *name;
 692         int                     rw;
 693         int                     data_type;
 694         int                     min;
 695         int                     max;
 696         int                     mul_factor;
 697         int                     div_factor;
 698         void                    *data;
 699         ide_procset_t           *set;
 700         int                     auto_remove;
 701         struct ide_settings_s   *next;
 702 } ide_settings_t;
 703
 704 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
 705
 706 /*
 707  * /proc/ide interface
 708  */
 709 typedef struct {
 710         const char      *name;
 711         mode_t          mode;
 712         read_proc_t     *read_proc;
 713         write_proc_t    *write_proc;
 714 } ide_proc_entry_t;
 715
 716 void proc_ide_create(void);
 717 void proc_ide_destroy(void);
 718 void ide_proc_register_port(ide_hwif_t *);
 719 void ide_proc_unregister_port(ide_hwif_t *);
 720 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
 721 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
 722
 723 void ide_add_generic_settings(ide_drive_t *);
 724
 725 read_proc_t proc_ide_read_capacity;
 726 read_proc_t proc_ide_read_geometry;
 727
 728 #ifdef CONFIG_BLK_DEV_IDEPCI
 729 void ide_pci_create_host_proc(const char *, get_info_t *);
 730 #endif
 731
 732 /*
 733  * Standard exit stuff:
 734  */
 735 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
 736 {                                       \
 737         len -= off;                     \
 738         if (len < count) {              \
 739                 *eof = 1;               \
 740                 if (len <= 0)           \
 741                         return 0;       \
 742         } else                          \
 743                 len = count;            \
 744         *start = page + off;            \
 745         return len;                     \
 746 }
 747 #else
 748 static inline void proc_ide_create(void) { ; }
 749 static inline void proc_ide_destroy(void) { ; }
 750 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
 751 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
 752 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 753 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 754 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 755 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 756 #endif
 757
 758 /*
 759  * Power Management step value (rq->pm->pm_step).
 760  *
 761  * The step value starts at 0 (ide_pm_state_start_suspend) for a
 762  * suspend operation or 1000 (ide_pm_state_start_resume) for a
 763  * resume operation.
 764  *
 765  * For each step, the core calls the subdriver start_power_step() first.
 766  * This can return:
 767  *      - ide_stopped : In this case, the core calls us back again unless
 768  *                      step have been set to ide_power_state_completed.
 769  *      - ide_started : In this case, the channel is left busy until an
 770  *                      async event (interrupt) occurs.
 771  * Typically, start_power_step() will issue a taskfile request with
 772  * do_rw_taskfile().
 773  *
 774  * Upon reception of the interrupt, the core will call complete_power_step()
 775  * with the error code if any. This routine should update the step value
 776  * and return. It should not start a new request. The core will call
 777  * start_power_step for the new step value, unless step have been set to
 778  * ide_power_state_completed.
 779  *
 780  * Subdrivers are expected to define their own additional power
 781  * steps from 1..999 for suspend and from 1001..1999 for resume,
 782  * other values are reserved for future use.
 783  */
 784
 785 enum {
 786         ide_pm_state_completed          = -1,
 787         ide_pm_state_start_suspend      = 0,
 788         ide_pm_state_start_resume       = 1000,
 789 };
 790
 791 /*
 792  * Subdrivers support.
 793  *
 794  * The gendriver.owner field should be set to the module owner of this driver.
 795  * The gendriver.name field should be set to the name of this driver
 796  */
 797 struct ide_driver_s {
 798         const char                      *version;
 799         u8                              media;
 800         unsigned supports_dsc_overlap   : 1;
 801         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
 802         int             (*end_request)(ide_drive_t *, int, int);
 803         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
 804         ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
 805         struct device_driver    gen_driver;
 806         int             (*probe)(ide_drive_t *);
 807         void            (*remove)(ide_drive_t *);
 808         void            (*resume)(ide_drive_t *);
 809         void            (*shutdown)(ide_drive_t *);
 810 #ifdef CONFIG_IDE_PROC_FS
 811         ide_proc_entry_t        *proc;
 812 #endif
 813 };
 814
 815 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
 816
 817 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
 818
 819 /*
 820  * ide_hwifs[] is the master data structure used to keep track
 821  * of just about everything in ide.c.  Whenever possible, routines
 822  * should be using pointers to a drive (ide_drive_t *) or
 823  * pointers to a hwif (ide_hwif_t *), rather than indexing this
 824  * structure directly (the allocation/layout may change!).
 825  *
 826  */
 827 #ifndef _IDE_C
 828 extern  ide_hwif_t      ide_hwifs[];            /* master data repository */
 829 #endif
 830 extern int noautodma;
 831
 832 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
 833 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
 834                              int uptodate, int nr_sectors);
 835
 836 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
 837
 838 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
 839                          ide_expiry_t *);
 840
 841 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
 842
 843 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
 844
 845 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
 846
 847 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
 848
 849 extern void ide_fix_driveid(struct hd_driveid *);
 850
 851 extern void ide_fixstring(u8 *, const int, const int);
 852
 853 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
 854
 855 extern ide_startstop_t ide_do_reset (ide_drive_t *);
 856
 857 extern void ide_init_drive_cmd (struct request *rq);
 858
 859 /*
 860  * "action" parameter type for ide_do_drive_cmd() below.
 861  */
 862 typedef enum {
 863         ide_wait,       /* insert rq at end of list, and wait for it */
 864         ide_preempt,    /* insert rq in front of current request */
 865         ide_head_wait,  /* insert rq in front of current request and wait for it */
 866         ide_end         /* insert rq at end of list, but don't wait for it */
 867 } ide_action_t;
 868
 869 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
 870
 871 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
 872
 873 enum {
 874         IDE_TFLAG_LBA48                 = (1 << 0),
 875         IDE_TFLAG_NO_SELECT_MASK        = (1 << 1),
 876         IDE_TFLAG_FLAGGED               = (1 << 2),
 877         IDE_TFLAG_OUT_DATA              = (1 << 3),
 878         IDE_TFLAG_OUT_HOB_FEATURE       = (1 << 4),
 879         IDE_TFLAG_OUT_HOB_NSECT         = (1 << 5),
 880         IDE_TFLAG_OUT_HOB_LBAL          = (1 << 6),
 881         IDE_TFLAG_OUT_HOB_LBAM          = (1 << 7),
 882         IDE_TFLAG_OUT_HOB_LBAH          = (1 << 8),
 883         IDE_TFLAG_OUT_HOB               = IDE_TFLAG_OUT_HOB_FEATURE |
 884                                           IDE_TFLAG_OUT_HOB_NSECT |
 885                                           IDE_TFLAG_OUT_HOB_LBAL |
 886                                           IDE_TFLAG_OUT_HOB_LBAM |
 887                                           IDE_TFLAG_OUT_HOB_LBAH,
 888         IDE_TFLAG_OUT_FEATURE           = (1 << 9),
 889         IDE_TFLAG_OUT_NSECT             = (1 << 10),
 890         IDE_TFLAG_OUT_LBAL              = (1 << 11),
 891         IDE_TFLAG_OUT_LBAM              = (1 << 12),
 892         IDE_TFLAG_OUT_LBAH              = (1 << 13),
 893         IDE_TFLAG_OUT_TF                = IDE_TFLAG_OUT_FEATURE |
 894                                           IDE_TFLAG_OUT_NSECT |
 895                                           IDE_TFLAG_OUT_LBAL |
 896                                           IDE_TFLAG_OUT_LBAM |
 897                                           IDE_TFLAG_OUT_LBAH,
 898         IDE_TFLAG_OUT_DEVICE            = (1 << 14),
 899         IDE_TFLAG_WRITE                 = (1 << 15),
 900         IDE_TFLAG_FLAGGED_SET_IN_FLAGS  = (1 << 16),
 901         IDE_TFLAG_IN_DATA               = (1 << 17),
 902         IDE_TFLAG_CUSTOM_HANDLER        = (1 << 18),
 903         IDE_TFLAG_DMA_PIO_FALLBACK      = (1 << 19),
 904         IDE_TFLAG_IN_HOB_FEATURE        = (1 << 20),
 905         IDE_TFLAG_IN_HOB_NSECT          = (1 << 21),
 906         IDE_TFLAG_IN_HOB_LBAL           = (1 << 22),
 907         IDE_TFLAG_IN_HOB_LBAM           = (1 << 23),
 908         IDE_TFLAG_IN_HOB_LBAH           = (1 << 24),
 909         IDE_TFLAG_IN_HOB_LBA            = IDE_TFLAG_IN_HOB_LBAL |
 910                                           IDE_TFLAG_IN_HOB_LBAM |
 911                                           IDE_TFLAG_IN_HOB_LBAH,
 912         IDE_TFLAG_IN_HOB                = IDE_TFLAG_IN_HOB_FEATURE |
 913                                           IDE_TFLAG_IN_HOB_NSECT |
 914                                           IDE_TFLAG_IN_HOB_LBA,
 915         IDE_TFLAG_IN_NSECT              = (1 << 25),
 916         IDE_TFLAG_IN_LBAL               = (1 << 26),
 917         IDE_TFLAG_IN_LBAM               = (1 << 27),
 918         IDE_TFLAG_IN_LBAH               = (1 << 28),
 919         IDE_TFLAG_IN_LBA                = IDE_TFLAG_IN_LBAL |
 920                                           IDE_TFLAG_IN_LBAM |
 921                                           IDE_TFLAG_IN_LBAH,
 922         IDE_TFLAG_IN_TF                 = IDE_TFLAG_IN_NSECT |
 923                                           IDE_TFLAG_IN_LBA,
 924         IDE_TFLAG_IN_DEVICE             = (1 << 29),
 925         IDE_TFLAG_HOB                   = IDE_TFLAG_OUT_HOB |
 926                                           IDE_TFLAG_IN_HOB,
 927         IDE_TFLAG_TF                    = IDE_TFLAG_OUT_TF |
 928                                           IDE_TFLAG_IN_TF,
 929         IDE_TFLAG_DEVICE                = IDE_TFLAG_OUT_DEVICE |
 930                                           IDE_TFLAG_IN_DEVICE,
 931         /* force 16-bit I/O operations */
 932         IDE_TFLAG_IO_16BIT              = (1 << 30),
 933 };
 934
 935 struct ide_taskfile {
 936         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
 937
 938         u8      hob_feature;    /*  1-5: additional data to support LBA48 */
 939         u8      hob_nsect;
 940         u8      hob_lbal;
 941         u8      hob_lbam;
 942         u8      hob_lbah;
 943
 944         u8      data;           /*  6: low data byte (for TASKFILE IOCTL) */
 945
 946         union {                 /*  7: */
 947                 u8 error;       /*   read:  error */
 948                 u8 feature;     /*  write: feature */
 949         };
 950
 951         u8      nsect;          /*  8: number of sectors */
 952         u8      lbal;           /*  9: LBA low */
 953         u8      lbam;           /* 10: LBA mid */
 954         u8      lbah;           /* 11: LBA high */
 955
 956         u8      device;         /* 12: device select */
 957
 958         union {                 /* 13: */
 959                 u8 status;      /*  read: status  */
 960                 u8 command;     /* write: command */
 961         };
 962 };
 963
 964 typedef struct ide_task_s {
 965         union {
 966                 struct ide_taskfile     tf;
 967                 u8                      tf_array[14];
 968         };
 969         u32                     tf_flags;
 970         int                     data_phase;
 971         struct request          *rq;            /* copy of request */
 972         void                    *special;       /* valid_t generally */
 973 } ide_task_t;
 974
 975 void ide_tf_load(ide_drive_t *, ide_task_t *);
 976 void ide_tf_read(ide_drive_t *, ide_task_t *);
 977
 978 extern void SELECT_DRIVE(ide_drive_t *);
 979 extern void SELECT_MASK(ide_drive_t *, int);
 980
 981 extern int drive_is_ready(ide_drive_t *);
 982
 983 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
 984
 985 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
 986
 987 void task_end_request(ide_drive_t *, struct request *, u8);
 988
 989 u8 wait_drive_not_busy(ide_drive_t *);
 990
 991 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
 992 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
 993
 994 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
 995 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
 996 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
 997
 998 extern int system_bus_clock(void);
 999
1000 extern int ide_driveid_update(ide_drive_t *);
1001 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1002 extern int ide_config_drive_speed(ide_drive_t *, u8);
1003 extern u8 eighty_ninty_three (ide_drive_t *);
1004 extern int set_transfer(ide_drive_t *, ide_task_t *);
1005 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1006
1007 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1008
1009 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1010
1011 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1012 extern void ide_timer_expiry(unsigned long);
1013 extern irqreturn_t ide_intr(int irq, void *dev_id);
1014 extern void do_ide_request(struct request_queue *);
1015
1016 void ide_init_disk(struct gendisk *, ide_drive_t *);
1017
1018 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1019 extern int ide_scan_direction;
1020 int __init ide_scan_pcibus(void);
1021 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1022 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1023 #else
1024 #define ide_pci_register_driver(d) pci_register_driver(d)
1025 #endif
1026
1027 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1028 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1029
1030 extern void default_hwif_iops(ide_hwif_t *);
1031 extern void default_hwif_mmiops(ide_hwif_t *);
1032 extern void default_hwif_transport(ide_hwif_t *);
1033
1034 typedef struct ide_pci_enablebit_s {
1035         u8      reg;    /* byte pci reg holding the enable-bit */
1036         u8      mask;   /* mask to isolate the enable-bit */
1037         u8      val;    /* value of masked reg when "enabled" */
1038 } ide_pci_enablebit_t;
1039
1040 enum {
1041         /* Uses ISA control ports not PCI ones. */
1042         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1043         /* single port device */
1044         IDE_HFLAG_SINGLE                = (1 << 1),
1045         /* don't use legacy PIO blacklist */
1046         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1047         /* don't use conservative PIO "downgrade" */
1048         IDE_HFLAG_PIO_NO_DOWNGRADE      = (1 << 3),
1049         /* use PIO8/9 for prefetch off/on */
1050         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1051         /* use PIO6/7 for fast-devsel off/on */
1052         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1053         /* use 100-102 and 200-202 PIO values to set DMA modes */
1054         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1055         /*
1056          * keep DMA setting when programming PIO mode, may be used only
1057          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1058          */
1059         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1060         /* program host for the transfer mode after programming device */
1061         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1062         /* don't program host/device for the transfer mode ("smart" hosts) */
1063         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1064         /* trust BIOS for programming chipset/device for DMA */
1065         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1066         /* host uses VDMA */
1067         IDE_HFLAG_VDMA                  = (1 << 11),
1068         /* ATAPI DMA is unsupported */
1069         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1070         /* set if host is a "bootable" controller */
1071         IDE_HFLAG_BOOTABLE              = (1 << 13),
1072         /* host doesn't support DMA */
1073         IDE_HFLAG_NO_DMA                = (1 << 14),
1074         /* check if host is PCI IDE device before allowing DMA */
1075         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1076         /* host is CS5510/CS5520 */
1077         IDE_HFLAG_CS5520                = (1 << 16),
1078         /* no LBA48 */
1079         IDE_HFLAG_NO_LBA48              = (1 << 17),
1080         /* no LBA48 DMA */
1081         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1082         /* data FIFO is cleared by an error */
1083         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1084         /* serialize ports */
1085         IDE_HFLAG_SERIALIZE             = (1 << 20),
1086         /* use legacy IRQs */
1087         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1088         /* force use of legacy IRQs */
1089         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1090         /* limit LBA48 requests to 256 sectors */
1091         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1092         /* use 32-bit I/O ops */
1093         IDE_HFLAG_IO_32BIT              = (1 << 24),
1094         /* unmask IRQs */
1095         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1096         IDE_HFLAG_ABUSE_SET_DMA_MODE    = (1 << 26),
1097         /* host is CY82C693 */
1098         IDE_HFLAG_CY82C693              = (1 << 27),
1099 };
1100
1101 #ifdef CONFIG_BLK_DEV_OFFBOARD
1102 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_BOOTABLE
1103 #else
1104 # define IDE_HFLAG_OFF_BOARD    0
1105 #endif
1106
1107 struct ide_port_info {
1108         char                    *name;
1109         unsigned int            (*init_chipset)(struct pci_dev *, const char *);
1110         void                    (*init_iops)(ide_hwif_t *);
1111         void                    (*init_hwif)(ide_hwif_t *);
1112         void                    (*init_dma)(ide_hwif_t *, unsigned long);
1113         ide_pci_enablebit_t     enablebits[2];
1114         hwif_chipset_t          chipset;
1115         u8                      extra;
1116         u32                     host_flags;
1117         u8                      pio_mask;
1118         u8                      swdma_mask;
1119         u8                      mwdma_mask;
1120         u8                      udma_mask;
1121 };
1122
1123 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1124 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1125
1126 void ide_map_sg(ide_drive_t *, struct request *);
1127 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1128
1129 #define BAD_DMA_DRIVE           0
1130 #define GOOD_DMA_DRIVE          1
1131
1132 struct drive_list_entry {
1133         const char *id_model;
1134         const char *id_firmware;
1135 };
1136
1137 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1138
1139 #ifdef CONFIG_BLK_DEV_IDEDMA
1140 int __ide_dma_bad_drive(ide_drive_t *);
1141 int ide_id_dma_bug(ide_drive_t *);
1142
1143 u8 ide_find_dma_mode(ide_drive_t *, u8);
1144
1145 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1146 {
1147         return ide_find_dma_mode(drive, XFER_UDMA_6);
1148 }
1149
1150 void ide_dma_off_quietly(ide_drive_t *);
1151 void ide_dma_off(ide_drive_t *);
1152 void ide_dma_on(ide_drive_t *);
1153 int ide_set_dma(ide_drive_t *);
1154 ide_startstop_t ide_dma_intr(ide_drive_t *);
1155
1156 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1157 extern int ide_build_sglist(ide_drive_t *, struct request *);
1158 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1159 extern void ide_destroy_dmatable(ide_drive_t *);
1160 extern int ide_release_dma(ide_hwif_t *);
1161 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1162
1163 void ide_dma_host_set(ide_drive_t *, int);
1164 extern int ide_dma_setup(ide_drive_t *);
1165 extern void ide_dma_start(ide_drive_t *);
1166 extern int __ide_dma_end(ide_drive_t *);
1167 extern void ide_dma_lost_irq(ide_drive_t *);
1168 extern void ide_dma_timeout(ide_drive_t *);
1169 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1170
1171 #else
1172 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1173 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1174 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1175 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1176 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1177 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1178 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1179 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1180 #endif /* CONFIG_BLK_DEV_IDEDMA */
1181
1182 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1183 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1184 #endif
1185
1186 #ifdef CONFIG_BLK_DEV_IDEACPI
1187 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1188 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1189 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1190 extern void ide_acpi_init(ide_hwif_t *hwif);
1191 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1192 #else
1193 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1194 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1195 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1196 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1197 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1198 #endif
1199
1200 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1201 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1202 extern void ide_unregister (unsigned int index);
1203
1204 void ide_register_region(struct gendisk *);
1205 void ide_unregister_region(struct gendisk *);
1206
1207 void ide_undecoded_slave(ide_drive_t *);
1208
1209 int ide_device_add_all(u8 *idx);
1210 int ide_device_add(u8 idx[4]);
1211
1212 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1213 {
1214         return hwif->hwif_data;
1215 }
1216
1217 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1218 {
1219         hwif->hwif_data = data;
1220 }
1221
1222 const char *ide_xfer_verbose(u8 mode);
1223 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1224 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1225
1226 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1227 {
1228         return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1229 }
1230
1231 static inline int ide_dev_is_sata(struct hd_driveid *id)
1232 {
1233         /*
1234          * See if word 93 is 0 AND drive is at least ATA-5 compatible
1235          * verifying that word 80 by casting it to a signed type --
1236          * this trick allows us to filter out the reserved values of
1237          * 0x0000 and 0xffff along with the earlier ATA revisions...
1238          */
1239         if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1240                 return 1;
1241         return 0;
1242 }
1243
1244 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1245 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1246
1247 typedef struct ide_pio_timings_s {
1248         int     setup_time;     /* Address setup (ns) minimum */
1249         int     active_time;    /* Active pulse (ns) minimum */
1250         int     cycle_time;     /* Cycle time (ns) minimum = */
1251                                 /* active + recovery (+ setup for some chips) */
1252 } ide_pio_timings_t;
1253
1254 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1255 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1256 extern const ide_pio_timings_t ide_pio_timings[6];
1257
1258 int ide_set_pio_mode(ide_drive_t *, u8);
1259 int ide_set_dma_mode(ide_drive_t *, u8);
1260
1261 void ide_set_pio(ide_drive_t *, u8);
1262
1263 static inline void ide_set_max_pio(ide_drive_t *drive)
1264 {
1265         ide_set_pio(drive, 255);
1266 }
1267
1268 extern spinlock_t ide_lock;
1269 extern struct mutex ide_cfg_mtx;
1270 /*
1271  * Structure locking:
1272  *
1273  * ide_cfg_mtx and ide_lock together protect changes to
1274  * ide_hwif_t->{next,hwgroup}
1275  * ide_drive_t->next
1276  *
1277  * ide_hwgroup_t->busy: ide_lock
1278  * ide_hwgroup_t->hwif: ide_lock
1279  * ide_hwif_t->mate: constant, no locking
1280  * ide_drive_t->hwif: constant, no locking
1281  */
1282
1283 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1284
1285 extern struct bus_type ide_bus_type;
1286
1287 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1288 #define ide_id_has_flush_cache(id)      ((id)->cfs_enable_2 & 0x3000)
1289
1290 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1291 #define ide_id_has_flush_cache_ext(id)  \
1292         (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1293
1294 static inline int hwif_to_node(ide_hwif_t *hwif)
1295 {
1296         struct pci_dev *dev = hwif->pci_dev;
1297         return dev ? pcibus_to_node(dev->bus) : -1;
1298 }
1299
1300 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1301 {
1302         ide_hwif_t *hwif        = HWIF(drive);
1303
1304         return &hwif->drives[(drive->dn ^ 1) & 1];
1305 }
1306
1307 static inline void ide_set_irq(ide_drive_t *drive, int on)
1308 {
1309         drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
1310 }
1311
1312 #endif /* _IDE_H */