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 /******************************************************************************
  31  * IDE driver configuration options (play with these as desired):
  32  *
  33  * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary
  34  */
  35 #define INITIAL_MULT_COUNT      0       /* off=0; on=2,4,8,16,32, etc.. */
  36
  37 #ifndef SUPPORT_SLOW_DATA_PORTS         /* 1 to support slow data ports */
  38 #define SUPPORT_SLOW_DATA_PORTS 1       /* 0 to reduce kernel size */
  39 #endif
  40 #ifndef SUPPORT_VLB_SYNC                /* 1 to support weird 32-bit chips */
  41 #define SUPPORT_VLB_SYNC        1       /* 0 to reduce kernel size */
  42 #endif
  43 #ifndef OK_TO_RESET_CONTROLLER          /* 1 needed for good error recovery */
  44 #define OK_TO_RESET_CONTROLLER  1       /* 0 for use with AH2372A/B interface */
  45 #endif
  46
  47 #ifndef DISABLE_IRQ_NOSYNC
  48 #define DISABLE_IRQ_NOSYNC      0
  49 #endif
  50
  51 /*
  52  * Used to indicate "no IRQ", should be a value that cannot be an IRQ
  53  * number.
  54  */
  55
  56 #define IDE_NO_IRQ              (-1)
  57
  58 /*
  59  *  "No user-serviceable parts" beyond this point  :)
  60  *****************************************************************************/
  61
  62 typedef unsigned char   byte;   /* used everywhere */
  63
  64 /*
  65  * Probably not wise to fiddle with these
  66  */
  67 #define ERROR_MAX       8       /* Max read/write errors per sector */
  68 #define ERROR_RESET     3       /* Reset controller every 4th retry */
  69 #define ERROR_RECAL     1       /* Recalibrate every 2nd retry */
  70
  71 /*
  72  * Tune flags
  73  */
  74 #define IDE_TUNE_NOAUTO         2
  75 #define IDE_TUNE_AUTO           1
  76 #define IDE_TUNE_DEFAULT        0
  77
  78 /*
  79  * state flags
  80  */
  81
  82 #define DMA_PIO_RETRY   1       /* retrying in PIO */
  83
  84 #define HWIF(drive)             ((ide_hwif_t *)((drive)->hwif))
  85 #define HWGROUP(drive)          ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  86
  87 /*
  88  * Definitions for accessing IDE controller registers
  89  */
  90 #define IDE_NR_PORTS            (10)
  91
  92 #define IDE_DATA_OFFSET         (0)
  93 #define IDE_ERROR_OFFSET        (1)
  94 #define IDE_NSECTOR_OFFSET      (2)
  95 #define IDE_SECTOR_OFFSET       (3)
  96 #define IDE_LCYL_OFFSET         (4)
  97 #define IDE_HCYL_OFFSET         (5)
  98 #define IDE_SELECT_OFFSET       (6)
  99 #define IDE_STATUS_OFFSET       (7)
 100 #define IDE_CONTROL_OFFSET      (8)
 101 #define IDE_IRQ_OFFSET          (9)
 102
 103 #define IDE_FEATURE_OFFSET      IDE_ERROR_OFFSET
 104 #define IDE_COMMAND_OFFSET      IDE_STATUS_OFFSET
 105
 106 #define IDE_CONTROL_OFFSET_HOB  (7)
 107
 108 #define IDE_DATA_REG            (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
 109 #define IDE_ERROR_REG           (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
 110 #define IDE_NSECTOR_REG         (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
 111 #define IDE_SECTOR_REG          (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
 112 #define IDE_LCYL_REG            (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
 113 #define IDE_HCYL_REG            (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
 114 #define IDE_SELECT_REG          (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
 115 #define IDE_STATUS_REG          (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
 116 #define IDE_CONTROL_REG         (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
 117 #define IDE_IRQ_REG             (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
 118
 119 #define IDE_FEATURE_REG         IDE_ERROR_REG
 120 #define IDE_COMMAND_REG         IDE_STATUS_REG
 121 #define IDE_ALTSTATUS_REG       IDE_CONTROL_REG
 122 #define IDE_IREASON_REG         IDE_NSECTOR_REG
 123 #define IDE_BCOUNTL_REG         IDE_LCYL_REG
 124 #define IDE_BCOUNTH_REG         IDE_HCYL_REG
 125
 126 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
 127 #define BAD_R_STAT              (BUSY_STAT   | ERR_STAT)
 128 #define BAD_W_STAT              (BAD_R_STAT  | WRERR_STAT)
 129 #define BAD_STAT                (BAD_R_STAT  | DRQ_STAT)
 130 #define DRIVE_READY             (READY_STAT  | SEEK_STAT)
 131 #define DATA_READY              (DRQ_STAT)
 132
 133 #define BAD_CRC                 (ABRT_ERR    | ICRC_ERR)
 134
 135 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
 136
 137 #define SATA_STATUS_OFFSET      (0)
 138 #define SATA_STATUS_REG         (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
 139 #define SATA_ERROR_OFFSET       (1)
 140 #define SATA_ERROR_REG          (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
 141 #define SATA_CONTROL_OFFSET     (2)
 142 #define SATA_CONTROL_REG        (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
 143
 144 #define SATA_MISC_OFFSET        (0)
 145 #define SATA_MISC_REG           (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
 146 #define SATA_PHY_OFFSET         (1)
 147 #define SATA_PHY_REG            (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
 148 #define SATA_IEN_OFFSET         (2)
 149 #define SATA_IEN_REG            (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
 150
 151 /*
 152  * Our Physical Region Descriptor (PRD) table should be large enough
 153  * to handle the biggest I/O request we are likely to see.  Since requests
 154  * can have no more than 256 sectors, and since the typical blocksize is
 155  * two or more sectors, we could get by with a limit of 128 entries here for
 156  * the usual worst case.  Most requests seem to include some contiguous blocks,
 157  * further reducing the number of table entries required.
 158  *
 159  * The driver reverts to PIO mode for individual requests that exceed
 160  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 161  * 100% of all crazy scenarios here is not necessary.
 162  *
 163  * As it turns out though, we must allocate a full 4KB page for this,
 164  * so the two PRD tables (ide0 & ide1) will each get half of that,
 165  * allowing each to have about 256 entries (8 bytes each) from this.
 166  */
 167 #define PRD_BYTES       8
 168 #define PRD_ENTRIES     256
 169
 170 /*
 171  * Some more useful definitions
 172  */
 173 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
 174 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
 175 #define SECTOR_SIZE     512
 176 #define SECTOR_WORDS    (SECTOR_SIZE / 4)       /* number of 32bit words per sector */
 177 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
 178
 179 /*
 180  * Timeouts for various operations:
 181  */
 182 #define WAIT_DRQ        (HZ/10)         /* 100msec - spec allows up to 20ms */
 183 #define WAIT_READY      (5*HZ)          /* 5sec - some laptops are very slow */
 184 #define WAIT_PIDENTIFY  (10*HZ) /* 10sec  - should be less than 3ms (?), if all ATAPI CD is closed at boot */
 185 #define WAIT_WORSTCASE  (30*HZ) /* 30sec  - worst case when spinning up */
 186 #define WAIT_CMD        (10*HZ) /* 10sec  - maximum wait for an IRQ to happen */
 187 #define WAIT_MIN_SLEEP  (2*HZ/100)      /* 20msec - minimum sleep time */
 188
 189 /*
 190  * Check for an interrupt and acknowledge the interrupt status
 191  */
 192 struct hwif_s;
 193 typedef int (ide_ack_intr_t)(struct hwif_s *);
 194
 195 /*
 196  * hwif_chipset_t is used to keep track of the specific hardware
 197  * chipset used by each IDE interface, if known.
 198  */
 199 enum {          ide_unknown,    ide_generic,    ide_pci,
 200                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
 201                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
 202                 ide_rz1000,     ide_trm290,
 203                 ide_cmd646,     ide_cy82c693,   ide_4drives,
 204                 ide_pmac,       ide_etrax100,   ide_acorn,
 205                 ide_au1xxx, ide_forced
 206 };
 207
 208 typedef u8 hwif_chipset_t;
 209
 210 /*
 211  * Structure to hold all information about the location of this port
 212  */
 213 typedef struct hw_regs_s {
 214         unsigned long   io_ports[IDE_NR_PORTS]; /* task file registers */
 215         int             irq;                    /* our irq number */
 216         ide_ack_intr_t  *ack_intr;              /* acknowledge interrupt */
 217         hwif_chipset_t  chipset;
 218         struct device   *dev;
 219 } hw_regs_t;
 220
 221 struct hwif_s * ide_find_port(unsigned long);
 222
 223 int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
 224                     struct hwif_s **);
 225
 226 void ide_setup_ports(   hw_regs_t *hw,
 227                         unsigned long base,
 228                         int *offsets,
 229                         unsigned long ctrl,
 230                         unsigned long intr,
 231                         ide_ack_intr_t *ack_intr,
 232 #if 0
 233                         ide_io_ops_t *iops,
 234 #endif
 235                         int irq);
 236
 237 static inline void ide_std_init_ports(hw_regs_t *hw,
 238                                       unsigned long io_addr,
 239                                       unsigned long ctl_addr)
 240 {
 241         unsigned int i;
 242
 243         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 244                 hw->io_ports[i] = io_addr++;
 245
 246         hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
 247 }
 248
 249 #include <asm/ide.h>
 250
 251 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
 252 #undef MAX_HWIFS
 253 #define MAX_HWIFS       CONFIG_IDE_MAX_HWIFS
 254 #endif
 255
 256 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
 257 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
 258 # define ide_default_io_base(index)     (0)
 259 # define ide_default_irq(base)          (0)
 260 # define ide_init_default_irq(base)     (0)
 261 #endif
 262
 263 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
 264 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 265                                        unsigned long io_addr,
 266                                        unsigned long ctl_addr,
 267                                        int *irq)
 268 {
 269         if (!ctl_addr)
 270                 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
 271         else
 272                 ide_std_init_ports(hw, io_addr, ctl_addr);
 273
 274         if (irq)
 275                 *irq = 0;
 276
 277         hw->io_ports[IDE_IRQ_OFFSET] = 0;
 278
 279 #ifdef CONFIG_PPC32
 280         if (ppc_ide_md.ide_init_hwif)
 281                 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
 282 #endif
 283 }
 284 #else
 285 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 286                                        unsigned long io_addr,
 287                                        unsigned long ctl_addr,
 288                                        int *irq)
 289 {
 290         if (io_addr || ctl_addr)
 291                 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
 292 }
 293 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
 294
 295 /* Currently only m68k, apus and m8xx need it */
 296 #ifndef IDE_ARCH_ACK_INTR
 297 # define ide_ack_intr(hwif) (1)
 298 #endif
 299
 300 /* Currently only Atari needs it */
 301 #ifndef IDE_ARCH_LOCK
 302 # define ide_release_lock()                     do {} while (0)
 303 # define ide_get_lock(hdlr, data)               do {} while (0)
 304 #endif /* IDE_ARCH_LOCK */
 305
 306 /*
 307  * Now for the data we need to maintain per-drive:  ide_drive_t
 308  */
 309
 310 #define ide_scsi        0x21
 311 #define ide_disk        0x20
 312 #define ide_optical     0x7
 313 #define ide_cdrom       0x5
 314 #define ide_tape        0x1
 315 #define ide_floppy      0x0
 316
 317 /*
 318  * Special Driver Flags
 319  *
 320  * set_geometry : respecify drive geometry
 321  * recalibrate  : seek to cyl 0
 322  * set_multmode : set multmode count
 323  * set_tune     : tune interface for drive
 324  * serviced     : service command
 325  * reserved     : unused
 326  */
 327 typedef union {
 328         unsigned all                    : 8;
 329         struct {
 330 #if defined(__LITTLE_ENDIAN_BITFIELD)
 331                 unsigned set_geometry   : 1;
 332                 unsigned recalibrate    : 1;
 333                 unsigned set_multmode   : 1;
 334                 unsigned set_tune       : 1;
 335                 unsigned serviced       : 1;
 336                 unsigned reserved       : 3;
 337 #elif defined(__BIG_ENDIAN_BITFIELD)
 338                 unsigned reserved       : 3;
 339                 unsigned serviced       : 1;
 340                 unsigned set_tune       : 1;
 341                 unsigned set_multmode   : 1;
 342                 unsigned recalibrate    : 1;
 343                 unsigned set_geometry   : 1;
 344 #else
 345 #error "Please fix <asm/byteorder.h>"
 346 #endif
 347         } b;
 348 } special_t;
 349
 350 /*
 351  * ATA DATA Register Special.
 352  * ATA NSECTOR Count Register().
 353  * ATAPI Byte Count Register.
 354  */
 355 typedef union {
 356         unsigned all                    :16;
 357         struct {
 358 #if defined(__LITTLE_ENDIAN_BITFIELD)
 359                 unsigned low            :8;     /* LSB */
 360                 unsigned high           :8;     /* MSB */
 361 #elif defined(__BIG_ENDIAN_BITFIELD)
 362                 unsigned high           :8;     /* MSB */
 363                 unsigned low            :8;     /* LSB */
 364 #else
 365 #error "Please fix <asm/byteorder.h>"
 366 #endif
 367         } b;
 368 } ata_nsector_t, ata_data_t, atapi_bcount_t;
 369
 370 /*
 371  * ATA-IDE Select Register, aka Device-Head
 372  *
 373  * head         : always zeros here
 374  * unit         : drive select number: 0/1
 375  * bit5         : always 1
 376  * lba          : using LBA instead of CHS
 377  * bit7         : always 1
 378  */
 379 typedef union {
 380         unsigned all                    : 8;
 381         struct {
 382 #if defined(__LITTLE_ENDIAN_BITFIELD)
 383                 unsigned head           : 4;
 384                 unsigned unit           : 1;
 385                 unsigned bit5           : 1;
 386                 unsigned lba            : 1;
 387                 unsigned bit7           : 1;
 388 #elif defined(__BIG_ENDIAN_BITFIELD)
 389                 unsigned bit7           : 1;
 390                 unsigned lba            : 1;
 391                 unsigned bit5           : 1;
 392                 unsigned unit           : 1;
 393                 unsigned head           : 4;
 394 #else
 395 #error "Please fix <asm/byteorder.h>"
 396 #endif
 397         } b;
 398 } select_t, ata_select_t;
 399
 400 /*
 401  * The ATA-IDE Status Register.
 402  * The ATAPI Status Register.
 403  *
 404  * check        : Error occurred
 405  * idx          : Index Error
 406  * corr         : Correctable error occurred
 407  * drq          : Data is request by the device
 408  * dsc          : Disk Seek Complete                    : ata
 409  *              : Media access command finished         : atapi
 410  * df           : Device Fault                          : ata
 411  *              : Reserved                              : atapi
 412  * drdy         : Ready, Command Mode Capable           : ata
 413  *              : Ignored for ATAPI commands            : atapi
 414  * bsy          : Disk is Busy
 415  *              : The device has access to the command block
 416  */
 417 typedef union {
 418         unsigned all                    :8;
 419         struct {
 420 #if defined(__LITTLE_ENDIAN_BITFIELD)
 421                 unsigned check          :1;
 422                 unsigned idx            :1;
 423                 unsigned corr           :1;
 424                 unsigned drq            :1;
 425                 unsigned dsc            :1;
 426                 unsigned df             :1;
 427                 unsigned drdy           :1;
 428                 unsigned bsy            :1;
 429 #elif defined(__BIG_ENDIAN_BITFIELD)
 430                 unsigned bsy            :1;
 431                 unsigned drdy           :1;
 432                 unsigned df             :1;
 433                 unsigned dsc            :1;
 434                 unsigned drq            :1;
 435                 unsigned corr           :1;
 436                 unsigned idx            :1;
 437                 unsigned check          :1;
 438 #else
 439 #error "Please fix <asm/byteorder.h>"
 440 #endif
 441         } b;
 442 } ata_status_t, atapi_status_t;
 443
 444 /*
 445  * ATAPI Feature Register
 446  *
 447  * dma          : Using DMA or PIO
 448  * reserved321  : Reserved
 449  * reserved654  : Reserved (Tag Type)
 450  * reserved7    : Reserved
 451  */
 452 typedef union {
 453         unsigned all                    :8;
 454         struct {
 455 #if defined(__LITTLE_ENDIAN_BITFIELD)
 456                 unsigned dma            :1;
 457                 unsigned reserved321    :3;
 458                 unsigned reserved654    :3;
 459                 unsigned reserved7      :1;
 460 #elif defined(__BIG_ENDIAN_BITFIELD)
 461                 unsigned reserved7      :1;
 462                 unsigned reserved654    :3;
 463                 unsigned reserved321    :3;
 464                 unsigned dma            :1;
 465 #else
 466 #error "Please fix <asm/byteorder.h>"
 467 #endif
 468         } b;
 469 } atapi_feature_t;
 470
 471 /*
 472  * ATAPI Interrupt Reason Register.
 473  *
 474  * cod          : Information transferred is command (1) or data (0)
 475  * io           : The device requests us to read (1) or write (0)
 476  * reserved     : Reserved
 477  */
 478 typedef union {
 479         unsigned all                    :8;
 480         struct {
 481 #if defined(__LITTLE_ENDIAN_BITFIELD)
 482                 unsigned cod            :1;
 483                 unsigned io             :1;
 484                 unsigned reserved       :6;
 485 #elif defined(__BIG_ENDIAN_BITFIELD)
 486                 unsigned reserved       :6;
 487                 unsigned io             :1;
 488                 unsigned cod            :1;
 489 #else
 490 #error "Please fix <asm/byteorder.h>"
 491 #endif
 492         } b;
 493 } atapi_ireason_t;
 494
 495 /*
 496  * The ATAPI error register.
 497  *
 498  * ili          : Illegal Length Indication
 499  * eom          : End Of Media Detected
 500  * abrt         : Aborted command - As defined by ATA
 501  * mcr          : Media Change Requested - As defined by ATA
 502  * sense_key    : Sense key of the last failed packet command
 503  */
 504 typedef union {
 505         unsigned all                    :8;
 506         struct {
 507 #if defined(__LITTLE_ENDIAN_BITFIELD)
 508                 unsigned ili            :1;
 509                 unsigned eom            :1;
 510                 unsigned abrt           :1;
 511                 unsigned mcr            :1;
 512                 unsigned sense_key      :4;
 513 #elif defined(__BIG_ENDIAN_BITFIELD)
 514                 unsigned sense_key      :4;
 515                 unsigned mcr            :1;
 516                 unsigned abrt           :1;
 517                 unsigned eom            :1;
 518                 unsigned ili            :1;
 519 #else
 520 #error "Please fix <asm/byteorder.h>"
 521 #endif
 522         } b;
 523 } atapi_error_t;
 524
 525 /*
 526  * Status returned from various ide_ functions
 527  */
 528 typedef enum {
 529         ide_stopped,    /* no drive operation was started */
 530         ide_started,    /* a drive operation was started, handler was set */
 531 } ide_startstop_t;
 532
 533 struct ide_driver_s;
 534 struct ide_settings_s;
 535
 536 #ifdef CONFIG_BLK_DEV_IDEACPI
 537 struct ide_acpi_drive_link;
 538 struct ide_acpi_hwif_link;
 539 #endif
 540
 541 typedef struct ide_drive_s {
 542         char            name[4];        /* drive name, such as "hda" */
 543         char            driver_req[10]; /* requests specific driver */
 544
 545         struct request_queue    *queue; /* request queue */
 546
 547         struct request          *rq;    /* current request */
 548         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 549         void            *driver_data;   /* extra driver data */
 550         struct hd_driveid       *id;    /* drive model identification info */
 551 #ifdef CONFIG_IDE_PROC_FS
 552         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 553         struct ide_settings_s *settings;/* /proc/ide/ drive settings */
 554 #endif
 555         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 556
 557         unsigned long sleep;            /* sleep until this time */
 558         unsigned long service_start;    /* time we started last request */
 559         unsigned long service_time;     /* service time of last request */
 560         unsigned long timeout;          /* max time to wait for irq */
 561
 562         special_t       special;        /* special action flags */
 563         select_t        select;         /* basic drive/head select reg value */
 564
 565         u8      keep_settings;          /* restore settings after drive reset */
 566         u8      using_dma;              /* disk is using dma for read/write */
 567         u8      retry_pio;              /* retrying dma capable host in pio */
 568         u8      state;                  /* retry state */
 569         u8      waiting_for_dma;        /* dma currently in progress */
 570         u8      unmask;                 /* okay to unmask other irqs */
 571         u8      bswap;                  /* byte swap data */
 572         u8      noflush;                /* don't attempt flushes */
 573         u8      dsc_overlap;            /* DSC overlap */
 574         u8      nice1;                  /* give potential excess bandwidth */
 575
 576         unsigned present        : 1;    /* drive is physically present */
 577         unsigned dead           : 1;    /* device ejected hint */
 578         unsigned id_read        : 1;    /* 1=id read from disk 0 = synthetic */
 579         unsigned noprobe        : 1;    /* from:  hdx=noprobe */
 580         unsigned removable      : 1;    /* 1 if need to do check_media_change */
 581         unsigned attach         : 1;    /* needed for removable devices */
 582         unsigned forced_geom    : 1;    /* 1 if hdx=c,h,s was given at boot */
 583         unsigned no_unmask      : 1;    /* disallow setting unmask bit */
 584         unsigned no_io_32bit    : 1;    /* disallow enabling 32bit I/O */
 585         unsigned atapi_overlap  : 1;    /* ATAPI overlap (not supported) */
 586         unsigned nice0          : 1;    /* give obvious excess bandwidth */
 587         unsigned nice2          : 1;    /* give a share in our own bandwidth */
 588         unsigned doorlocking    : 1;    /* for removable only: door lock/unlock works */
 589         unsigned nodma          : 1;    /* disallow DMA */
 590         unsigned autotune       : 2;    /* 0=default, 1=autotune, 2=noautotune */
 591         unsigned remap_0_to_1   : 1;    /* 0=noremap, 1=remap 0->1 (for EZDrive) */
 592         unsigned blocked        : 1;    /* 1=powermanagment told us not to do anything, so sleep nicely */
 593         unsigned vdma           : 1;    /* 1=doing PIO over DMA 0=doing normal DMA */
 594         unsigned scsi           : 1;    /* 0=default, 1=ide-scsi emulation */
 595         unsigned sleeping       : 1;    /* 1=sleeping & sleep field valid */
 596         unsigned post_reset     : 1;
 597         unsigned udma33_warned  : 1;
 598
 599         u8      addressing;     /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
 600         u8      quirk_list;     /* considered quirky, set for a specific host */
 601         u8      init_speed;     /* transfer rate set at boot */
 602         u8      current_speed;  /* current transfer rate set */
 603         u8      desired_speed;  /* desired transfer rate set */
 604         u8      dn;             /* now wide spread use */
 605         u8      wcache;         /* status of write cache */
 606         u8      acoustic;       /* acoustic management */
 607         u8      media;          /* disk, cdrom, tape, floppy, ... */
 608         u8      ctl;            /* "normal" value for IDE_CONTROL_REG */
 609         u8      ready_stat;     /* min status value for drive ready */
 610         u8      mult_count;     /* current multiple sector setting */
 611         u8      mult_req;       /* requested multiple sector setting */
 612         u8      tune_req;       /* requested drive tuning setting */
 613         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 614         u8      bad_wstat;      /* used for ignoring WRERR_STAT */
 615         u8      nowerr;         /* used for ignoring WRERR_STAT */
 616         u8      sect0;          /* offset of first sector for DM6:DDO */
 617         u8      head;           /* "real" number of heads */
 618         u8      sect;           /* "real" sectors per track */
 619         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 620         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 621
 622         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 623         unsigned int    cyl;            /* "real" number of cyls */
 624         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 625         unsigned int    failures;       /* current failure count */
 626         unsigned int    max_failures;   /* maximum allowed failure count */
 627         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 628
 629         u64             capacity64;     /* total number of sectors */
 630
 631         int             lun;            /* logical unit */
 632         int             crc_count;      /* crc counter to reduce drive speed */
 633 #ifdef CONFIG_BLK_DEV_IDEACPI
 634         struct ide_acpi_drive_link *acpidata;
 635 #endif
 636         struct list_head list;
 637         struct device   gendev;
 638         struct completion gendev_rel_comp;      /* to deal with device release() */
 639 } ide_drive_t;
 640
 641 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
 642
 643 #define IDE_CHIPSET_PCI_MASK    \
 644     ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
 645 #define IDE_CHIPSET_IS_PCI(c)   ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
 646
 647 struct ide_port_info;
 648
 649 typedef struct hwif_s {
 650         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 651         struct hwif_s *mate;            /* other hwif from same PCI chip */
 652         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 653         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 654
 655         char name[6];                   /* name of interface, eg. "ide0" */
 656
 657                 /* task file registers for pata and sata */
 658         unsigned long   io_ports[IDE_NR_PORTS];
 659         unsigned long   sata_scr[SATA_NR_PORTS];
 660         unsigned long   sata_misc[SATA_NR_PORTS];
 661
 662         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 663
 664         u8 major;       /* our major number */
 665         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 666         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 667         u8 straight8;   /* Alan's straight 8 check */
 668         u8 bus_state;   /* power state of the IDE bus */
 669
 670         u32 host_flags;
 671
 672         u8 pio_mask;
 673
 674         u8 ultra_mask;
 675         u8 mwdma_mask;
 676         u8 swdma_mask;
 677
 678         u8 cbl;         /* cable type */
 679
 680         hwif_chipset_t chipset; /* sub-module for tuning.. */
 681
 682         struct pci_dev  *pci_dev;       /* for pci chipsets */
 683         const struct ide_port_info *cds;        /* chipset device struct */
 684
 685         ide_ack_intr_t *ack_intr;
 686
 687         void (*rw_disk)(ide_drive_t *, struct request *);
 688
 689 #if 0
 690         ide_hwif_ops_t  *hwifops;
 691 #else
 692         /* routine to program host for PIO mode */
 693         void    (*set_pio_mode)(ide_drive_t *, const u8);
 694         /* routine to program host for DMA mode */
 695         void    (*set_dma_mode)(ide_drive_t *, const u8);
 696         /* tweaks hardware to select drive */
 697         void    (*selectproc)(ide_drive_t *);
 698         /* chipset polling based on hba specifics */
 699         int     (*reset_poll)(ide_drive_t *);
 700         /* chipset specific changes to default for device-hba resets */
 701         void    (*pre_reset)(ide_drive_t *);
 702         /* routine to reset controller after a disk reset */
 703         void    (*resetproc)(ide_drive_t *);
 704         /* special interrupt handling for shared pci interrupts */
 705         void    (*intrproc)(ide_drive_t *);
 706         /* special host masking for drive selection */
 707         void    (*maskproc)(ide_drive_t *, int);
 708         /* check host's drive quirk list */
 709         int     (*quirkproc)(ide_drive_t *);
 710         /* driver soft-power interface */
 711         int     (*busproc)(ide_drive_t *, int);
 712 #endif
 713         u8 (*mdma_filter)(ide_drive_t *);
 714         u8 (*udma_filter)(ide_drive_t *);
 715
 716         void (*fixup)(struct hwif_s *);
 717
 718         void (*ata_input_data)(ide_drive_t *, void *, u32);
 719         void (*ata_output_data)(ide_drive_t *, void *, u32);
 720
 721         void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
 722         void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
 723
 724         int (*dma_setup)(ide_drive_t *);
 725         void (*dma_exec_cmd)(ide_drive_t *, u8);
 726         void (*dma_start)(ide_drive_t *);
 727         int (*ide_dma_end)(ide_drive_t *drive);
 728         int (*ide_dma_on)(ide_drive_t *drive);
 729         void (*dma_off_quietly)(ide_drive_t *drive);
 730         int (*ide_dma_test_irq)(ide_drive_t *drive);
 731         void (*ide_dma_clear_irq)(ide_drive_t *drive);
 732         void (*dma_host_on)(ide_drive_t *drive);
 733         void (*dma_host_off)(ide_drive_t *drive);
 734         void (*dma_lost_irq)(ide_drive_t *drive);
 735         void (*dma_timeout)(ide_drive_t *drive);
 736
 737         void (*OUTB)(u8 addr, unsigned long port);
 738         void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
 739         void (*OUTW)(u16 addr, unsigned long port);
 740         void (*OUTSW)(unsigned long port, void *addr, u32 count);
 741         void (*OUTSL)(unsigned long port, void *addr, u32 count);
 742
 743         u8  (*INB)(unsigned long port);
 744         u16 (*INW)(unsigned long port);
 745         void (*INSW)(unsigned long port, void *addr, u32 count);
 746         void (*INSL)(unsigned long port, void *addr, u32 count);
 747
 748         /* dma physical region descriptor table (cpu view) */
 749         unsigned int    *dmatable_cpu;
 750         /* dma physical region descriptor table (dma view) */
 751         dma_addr_t      dmatable_dma;
 752         /* Scatter-gather list used to build the above */
 753         struct scatterlist *sg_table;
 754         int sg_max_nents;               /* Maximum number of entries in it */
 755         int sg_nents;                   /* Current number of entries in it */
 756         int sg_dma_direction;           /* dma transfer direction */
 757
 758         /* data phase of the active command (currently only valid for PIO/DMA) */
 759         int             data_phase;
 760
 761         unsigned int nsect;
 762         unsigned int nleft;
 763         struct scatterlist *cursg;
 764         unsigned int cursg_ofs;
 765
 766         int             rqsize;         /* max sectors per request */
 767         int             irq;            /* our irq number */
 768
 769         unsigned long   dma_master;     /* reference base addr dmabase */
 770         unsigned long   dma_base;       /* base addr for dma ports */
 771         unsigned long   dma_command;    /* dma command register */
 772         unsigned long   dma_vendor1;    /* dma vendor 1 register */
 773         unsigned long   dma_status;     /* dma status register */
 774         unsigned long   dma_vendor3;    /* dma vendor 3 register */
 775         unsigned long   dma_prdtable;   /* actual prd table address */
 776
 777         unsigned long   config_data;    /* for use by chipset-specific code */
 778         unsigned long   select_data;    /* for use by chipset-specific code */
 779
 780         unsigned long   extra_base;     /* extra addr for dma ports */
 781         unsigned        extra_ports;    /* number of extra dma ports */
 782
 783         unsigned        noprobe    : 1; /* don't probe for this interface */
 784         unsigned        present    : 1; /* this interface exists */
 785         unsigned        hold       : 1; /* this interface is always present */
 786         unsigned        serialized : 1; /* serialized all channel operation */
 787         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 788         unsigned        reset      : 1; /* reset after probe */
 789         unsigned        auto_poll  : 1; /* supports nop auto-poll */
 790         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 791         unsigned        no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
 792         unsigned        mmio       : 1; /* host uses MMIO */
 793
 794         struct device   gendev;
 795         struct completion gendev_rel_comp; /* To deal with device release() */
 796
 797         void            *hwif_data;     /* extra hwif data */
 798
 799         unsigned dma;
 800
 801 #ifdef CONFIG_BLK_DEV_IDEACPI
 802         struct ide_acpi_hwif_link *acpidata;
 803 #endif
 804 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 805
 806 /*
 807  *  internal ide interrupt handler type
 808  */
 809 typedef ide_startstop_t (ide_pre_handler_t)(ide_drive_t *, struct request *);
 810 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 811 typedef int (ide_expiry_t)(ide_drive_t *);
 812
 813 typedef struct hwgroup_s {
 814                 /* irq handler, if active */
 815         ide_startstop_t (*handler)(ide_drive_t *);
 816                 /* irq handler, suspended if active */
 817         ide_startstop_t (*handler_save)(ide_drive_t *);
 818                 /* BOOL: protects all fields below */
 819         volatile int busy;
 820                 /* BOOL: wake us up on timer expiry */
 821         unsigned int sleeping   : 1;
 822                 /* BOOL: polling active & poll_timeout field valid */
 823         unsigned int polling    : 1;
 824                 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
 825         unsigned int resetting  : 1;
 826
 827                 /* current drive */
 828         ide_drive_t *drive;
 829                 /* ptr to current hwif in linked-list */
 830         ide_hwif_t *hwif;
 831
 832                 /* for pci chipsets */
 833         struct pci_dev *pci_dev;
 834
 835                 /* current request */
 836         struct request *rq;
 837                 /* failsafe timer */
 838         struct timer_list timer;
 839                 /* local copy of current write rq */
 840         struct request wrq;
 841                 /* timeout value during long polls */
 842         unsigned long poll_timeout;
 843                 /* queried upon timeouts */
 844         int (*expiry)(ide_drive_t *);
 845                 /* ide_system_bus_speed */
 846         int pio_clock;
 847         int req_gen;
 848         int req_gen_timer;
 849
 850         unsigned char cmd_buf[4];
 851 } ide_hwgroup_t;
 852
 853 typedef struct ide_driver_s ide_driver_t;
 854
 855 extern struct mutex ide_setting_mtx;
 856
 857 int set_io_32bit(ide_drive_t *, int);
 858 int set_pio_mode(ide_drive_t *, int);
 859 int set_using_dma(ide_drive_t *, int);
 860
 861 #ifdef CONFIG_IDE_PROC_FS
 862 /*
 863  * configurable drive settings
 864  */
 865
 866 #define TYPE_INT        0
 867 #define TYPE_BYTE       1
 868 #define TYPE_SHORT      2
 869
 870 #define SETTING_READ    (1 << 0)
 871 #define SETTING_WRITE   (1 << 1)
 872 #define SETTING_RW      (SETTING_READ | SETTING_WRITE)
 873
 874 typedef int (ide_procset_t)(ide_drive_t *, int);
 875 typedef struct ide_settings_s {
 876         char                    *name;
 877         int                     rw;
 878         int                     data_type;
 879         int                     min;
 880         int                     max;
 881         int                     mul_factor;
 882         int                     div_factor;
 883         void                    *data;
 884         ide_procset_t           *set;
 885         int                     auto_remove;
 886         struct ide_settings_s   *next;
 887 } ide_settings_t;
 888
 889 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
 890
 891 /*
 892  * /proc/ide interface
 893  */
 894 typedef struct {
 895         const char      *name;
 896         mode_t          mode;
 897         read_proc_t     *read_proc;
 898         write_proc_t    *write_proc;
 899 } ide_proc_entry_t;
 900
 901 void proc_ide_create(void);
 902 void proc_ide_destroy(void);
 903 void ide_proc_register_port(ide_hwif_t *);
 904 void ide_proc_unregister_port(ide_hwif_t *);
 905 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
 906 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
 907
 908 void ide_add_generic_settings(ide_drive_t *);
 909
 910 read_proc_t proc_ide_read_capacity;
 911 read_proc_t proc_ide_read_geometry;
 912
 913 #ifdef CONFIG_BLK_DEV_IDEPCI
 914 void ide_pci_create_host_proc(const char *, get_info_t *);
 915 #endif
 916
 917 /*
 918  * Standard exit stuff:
 919  */
 920 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
 921 {                                       \
 922         len -= off;                     \
 923         if (len < count) {              \
 924                 *eof = 1;               \
 925                 if (len <= 0)           \
 926                         return 0;       \
 927         } else                          \
 928                 len = count;            \
 929         *start = page + off;            \
 930         return len;                     \
 931 }
 932 #else
 933 static inline void proc_ide_create(void) { ; }
 934 static inline void proc_ide_destroy(void) { ; }
 935 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
 936 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
 937 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 938 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 939 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 940 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 941 #endif
 942
 943 /*
 944  * Power Management step value (rq->pm->pm_step).
 945  *
 946  * The step value starts at 0 (ide_pm_state_start_suspend) for a
 947  * suspend operation or 1000 (ide_pm_state_start_resume) for a
 948  * resume operation.
 949  *
 950  * For each step, the core calls the subdriver start_power_step() first.
 951  * This can return:
 952  *      - ide_stopped : In this case, the core calls us back again unless
 953  *                      step have been set to ide_power_state_completed.
 954  *      - ide_started : In this case, the channel is left busy until an
 955  *                      async event (interrupt) occurs.
 956  * Typically, start_power_step() will issue a taskfile request with
 957  * do_rw_taskfile().
 958  *
 959  * Upon reception of the interrupt, the core will call complete_power_step()
 960  * with the error code if any. This routine should update the step value
 961  * and return. It should not start a new request. The core will call
 962  * start_power_step for the new step value, unless step have been set to
 963  * ide_power_state_completed.
 964  *
 965  * Subdrivers are expected to define their own additional power
 966  * steps from 1..999 for suspend and from 1001..1999 for resume,
 967  * other values are reserved for future use.
 968  */
 969
 970 enum {
 971         ide_pm_state_completed          = -1,
 972         ide_pm_state_start_suspend      = 0,
 973         ide_pm_state_start_resume       = 1000,
 974 };
 975
 976 /*
 977  * Subdrivers support.
 978  *
 979  * The gendriver.owner field should be set to the module owner of this driver.
 980  * The gendriver.name field should be set to the name of this driver
 981  */
 982 struct ide_driver_s {
 983         const char                      *version;
 984         u8                              media;
 985         unsigned supports_dsc_overlap   : 1;
 986         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
 987         int             (*end_request)(ide_drive_t *, int, int);
 988         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
 989         ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
 990         struct device_driver    gen_driver;
 991         int             (*probe)(ide_drive_t *);
 992         void            (*remove)(ide_drive_t *);
 993         void            (*resume)(ide_drive_t *);
 994         void            (*shutdown)(ide_drive_t *);
 995 #ifdef CONFIG_IDE_PROC_FS
 996         ide_proc_entry_t        *proc;
 997 #endif
 998 };
 999
1000 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
1001
1002 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
1003
1004 /*
1005  * ide_hwifs[] is the master data structure used to keep track
1006  * of just about everything in ide.c.  Whenever possible, routines
1007  * should be using pointers to a drive (ide_drive_t *) or
1008  * pointers to a hwif (ide_hwif_t *), rather than indexing this
1009  * structure directly (the allocation/layout may change!).
1010  *
1011  */
1012 #ifndef _IDE_C
1013 extern  ide_hwif_t      ide_hwifs[];            /* master data repository */
1014 #endif
1015 extern int noautodma;
1016
1017 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1018 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1019                              int uptodate, int nr_sectors);
1020
1021 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1022
1023 extern void ide_execute_command(ide_drive_t *, task_ioreg_t cmd, ide_handler_t *, unsigned int, ide_expiry_t *);
1024
1025 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1026
1027 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1028
1029 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
1030
1031 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
1032
1033 extern void ide_fix_driveid(struct hd_driveid *);
1034 /*
1035  * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
1036  * removing leading/trailing blanks and compressing internal blanks.
1037  * It is primarily used to tidy up the model name/number fields as
1038  * returned by the WIN_[P]IDENTIFY commands.
1039  *
1040  * (s, bytecount, byteswap)
1041  */
1042 extern void ide_fixstring(u8 *, const int, const int);
1043
1044 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1045
1046 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1047
1048 extern void ide_init_drive_cmd (struct request *rq);
1049
1050 /*
1051  * "action" parameter type for ide_do_drive_cmd() below.
1052  */
1053 typedef enum {
1054         ide_wait,       /* insert rq at end of list, and wait for it */
1055         ide_preempt,    /* insert rq in front of current request */
1056         ide_head_wait,  /* insert rq in front of current request and wait for it */
1057         ide_end         /* insert rq at end of list, but don't wait for it */
1058 } ide_action_t;
1059
1060 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
1061
1062 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1063
1064 /*
1065  * Issue ATA command and wait for completion.
1066  * Use for implementing commands in kernel
1067  *
1068  *  (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
1069  */
1070 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
1071
1072 typedef struct ide_task_s {
1073 /*
1074  *      struct hd_drive_task_hdr        tf;
1075  *      task_struct_t           tf;
1076  *      struct hd_drive_hob_hdr         hobf;
1077  *      hob_struct_t            hobf;
1078  */
1079         task_ioreg_t            tfRegister[8];
1080         task_ioreg_t            hobRegister[8];
1081         ide_reg_valid_t         tf_out_flags;
1082         ide_reg_valid_t         tf_in_flags;
1083         int                     data_phase;
1084         int                     command_type;
1085         ide_pre_handler_t       *prehandler;
1086         ide_handler_t           *handler;
1087         struct request          *rq;            /* copy of request */
1088         void                    *special;       /* valid_t generally */
1089 } ide_task_t;
1090
1091 extern u32 ide_read_24(ide_drive_t *);
1092
1093 extern void SELECT_DRIVE(ide_drive_t *);
1094 extern void SELECT_INTERRUPT(ide_drive_t *);
1095 extern void SELECT_MASK(ide_drive_t *, int);
1096 extern void QUIRK_LIST(ide_drive_t *);
1097
1098 extern int drive_is_ready(ide_drive_t *);
1099
1100 /*
1101  * taskfile io for disks for now...and builds request from ide_ioctl
1102  */
1103 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1104
1105 /*
1106  * Special Flagged Register Validation Caller
1107  */
1108 extern ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
1109
1110 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
1111 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
1112 extern ide_startstop_t recal_intr(ide_drive_t *);
1113 extern ide_startstop_t task_no_data_intr(ide_drive_t *);
1114 extern ide_startstop_t task_in_intr(ide_drive_t *);
1115 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
1116
1117 extern int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *);
1118
1119 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1120 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
1121 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
1122
1123 extern int system_bus_clock(void);
1124
1125 extern int ide_driveid_update(ide_drive_t *);
1126 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
1127 extern int ide_config_drive_speed(ide_drive_t *, u8);
1128 extern u8 eighty_ninty_three (ide_drive_t *);
1129 extern int set_transfer(ide_drive_t *, ide_task_t *);
1130 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1131
1132 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1133
1134 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1135
1136 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1137 extern void ide_timer_expiry(unsigned long);
1138 extern irqreturn_t ide_intr(int irq, void *dev_id);
1139 extern void do_ide_request(struct request_queue *);
1140
1141 void ide_init_disk(struct gendisk *, ide_drive_t *);
1142
1143 extern int ideprobe_init(void);
1144
1145 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1146 extern void ide_scan_pcibus(int scan_direction) __init;
1147 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1148 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1149 #else
1150 #define ide_pci_register_driver(d) pci_register_driver(d)
1151 #endif
1152
1153 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1154 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1155
1156 extern void default_hwif_iops(ide_hwif_t *);
1157 extern void default_hwif_mmiops(ide_hwif_t *);
1158 extern void default_hwif_transport(ide_hwif_t *);
1159
1160 typedef struct ide_pci_enablebit_s {
1161         u8      reg;    /* byte pci reg holding the enable-bit */
1162         u8      mask;   /* mask to isolate the enable-bit */
1163         u8      val;    /* value of masked reg when "enabled" */
1164 } ide_pci_enablebit_t;
1165
1166 enum {
1167         /* Uses ISA control ports not PCI ones. */
1168         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1169         /* single port device */
1170         IDE_HFLAG_SINGLE                = (1 << 1),
1171         /* don't use legacy PIO blacklist */
1172         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1173         /* don't use conservative PIO "downgrade" */
1174         IDE_HFLAG_PIO_NO_DOWNGRADE      = (1 << 3),
1175         /* use PIO8/9 for prefetch off/on */
1176         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1177         /* use PIO6/7 for fast-devsel off/on */
1178         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1179         /* use 100-102 and 200-202 PIO values to set DMA modes */
1180         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1181         /*
1182          * keep DMA setting when programming PIO mode, may be used only
1183          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1184          */
1185         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1186         /* program host for the transfer mode after programming device */
1187         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1188         /* don't program host/device for the transfer mode ("smart" hosts) */
1189         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1190         /* trust BIOS for programming chipset/device for DMA */
1191         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1192         /* host uses VDMA */
1193         IDE_HFLAG_VDMA                  = (1 << 11),
1194         /* ATAPI DMA is unsupported */
1195         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1196         /* set if host is a "bootable" controller */
1197         IDE_HFLAG_BOOTABLE              = (1 << 13),
1198         /* host doesn't support DMA */
1199         IDE_HFLAG_NO_DMA                = (1 << 14),
1200         /* check if host is PCI IDE device before allowing DMA */
1201         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1202         /* host is CS5510/CS5520 */
1203         IDE_HFLAG_CS5520                = (1 << 16),
1204         /* no LBA48 */
1205         IDE_HFLAG_NO_LBA48              = (1 << 17),
1206         /* no LBA48 DMA */
1207         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1208         /* data FIFO is cleared by an error */
1209         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1210         /* serialize ports */
1211         IDE_HFLAG_SERIALIZE             = (1 << 20),
1212         /* use legacy IRQs */
1213         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1214         /* force use of legacy IRQs */
1215         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1216         /* limit LBA48 requests to 256 sectors */
1217         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1218         /* use 32-bit I/O ops */
1219         IDE_HFLAG_IO_32BIT              = (1 << 24),
1220         /* unmask IRQs */
1221         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1222 };
1223
1224 #ifdef CONFIG_BLK_DEV_OFFBOARD
1225 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_BOOTABLE
1226 #else
1227 # define IDE_HFLAG_OFF_BOARD    0
1228 #endif
1229
1230 struct ide_port_info {
1231         char                    *name;
1232         unsigned int            (*init_chipset)(struct pci_dev *, const char *);
1233         void                    (*init_iops)(ide_hwif_t *);
1234         void                    (*init_hwif)(ide_hwif_t *);
1235         void                    (*init_dma)(ide_hwif_t *, unsigned long);
1236         void                    (*fixup)(ide_hwif_t *);
1237         ide_pci_enablebit_t     enablebits[2];
1238         hwif_chipset_t          chipset;
1239         unsigned int            extra;
1240         u32                     host_flags;
1241         u8                      pio_mask;
1242         u8                      swdma_mask;
1243         u8                      mwdma_mask;
1244         u8                      udma_mask;
1245 };
1246
1247 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1248 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1249
1250 void ide_map_sg(ide_drive_t *, struct request *);
1251 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1252
1253 #define BAD_DMA_DRIVE           0
1254 #define GOOD_DMA_DRIVE          1
1255
1256 struct drive_list_entry {
1257         const char *id_model;
1258         const char *id_firmware;
1259 };
1260
1261 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1262
1263 #ifdef CONFIG_BLK_DEV_IDEDMA
1264 int __ide_dma_bad_drive(ide_drive_t *);
1265
1266 u8 ide_find_dma_mode(ide_drive_t *, u8);
1267
1268 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1269 {
1270         return ide_find_dma_mode(drive, XFER_UDMA_6);
1271 }
1272
1273 void ide_dma_off(ide_drive_t *);
1274 void ide_dma_verbose(ide_drive_t *);
1275 int ide_set_dma(ide_drive_t *);
1276 ide_startstop_t ide_dma_intr(ide_drive_t *);
1277
1278 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1279 extern int ide_build_sglist(ide_drive_t *, struct request *);
1280 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1281 extern void ide_destroy_dmatable(ide_drive_t *);
1282 extern int ide_release_dma(ide_hwif_t *);
1283 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1284
1285 void ide_dma_host_off(ide_drive_t *);
1286 void ide_dma_off_quietly(ide_drive_t *);
1287 void ide_dma_host_on(ide_drive_t *);
1288 extern int __ide_dma_on(ide_drive_t *);
1289 extern int ide_dma_setup(ide_drive_t *);
1290 extern void ide_dma_start(ide_drive_t *);
1291 extern int __ide_dma_end(ide_drive_t *);
1292 extern void ide_dma_lost_irq(ide_drive_t *);
1293 extern void ide_dma_timeout(ide_drive_t *);
1294 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1295
1296 #else
1297 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1298 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1299 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1300 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1301 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1302 #endif /* CONFIG_BLK_DEV_IDEDMA */
1303
1304 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1305 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1306 #endif
1307
1308 #ifdef CONFIG_BLK_DEV_IDEACPI
1309 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1310 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1311 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1312 extern void ide_acpi_init(ide_hwif_t *hwif);
1313 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1314 #else
1315 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1316 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1317 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1318 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1319 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1320 #endif
1321
1322 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1323 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1324 extern void ide_unregister (unsigned int index);
1325
1326 void ide_register_region(struct gendisk *);
1327 void ide_unregister_region(struct gendisk *);
1328
1329 void ide_undecoded_slave(ide_hwif_t *);
1330
1331 int ide_device_add(u8 idx[4]);
1332
1333 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1334 {
1335         return hwif->hwif_data;
1336 }
1337
1338 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1339 {
1340         hwif->hwif_data = data;
1341 }
1342
1343 /* ide-lib.c */
1344 extern char *ide_xfer_verbose(u8 xfer_rate);
1345 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1346 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1347
1348 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1349 {
1350         return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1351 }
1352
1353 static inline int ide_dev_is_sata(struct hd_driveid *id)
1354 {
1355         /*
1356          * See if word 93 is 0 AND drive is at least ATA-5 compatible
1357          * verifying that word 80 by casting it to a signed type --
1358          * this trick allows us to filter out the reserved values of
1359          * 0x0000 and 0xffff along with the earlier ATA revisions...
1360          */
1361         if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1362                 return 1;
1363         return 0;
1364 }
1365
1366 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1367
1368 typedef struct ide_pio_timings_s {
1369         int     setup_time;     /* Address setup (ns) minimum */
1370         int     active_time;    /* Active pulse (ns) minimum */
1371         int     cycle_time;     /* Cycle time (ns) minimum = */
1372                                 /* active + recovery (+ setup for some chips) */
1373 } ide_pio_timings_t;
1374
1375 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1376 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1377 extern const ide_pio_timings_t ide_pio_timings[6];
1378
1379 int ide_set_pio_mode(ide_drive_t *, u8);
1380 int ide_set_dma_mode(ide_drive_t *, u8);
1381
1382 void ide_set_pio(ide_drive_t *, u8);
1383
1384 static inline void ide_set_max_pio(ide_drive_t *drive)
1385 {
1386         ide_set_pio(drive, 255);
1387 }
1388
1389 extern spinlock_t ide_lock;
1390 extern struct mutex ide_cfg_mtx;
1391 /*
1392  * Structure locking:
1393  *
1394  * ide_cfg_mtx and ide_lock together protect changes to
1395  * ide_hwif_t->{next,hwgroup}
1396  * ide_drive_t->next
1397  *
1398  * ide_hwgroup_t->busy: ide_lock
1399  * ide_hwgroup_t->hwif: ide_lock
1400  * ide_hwif_t->mate: constant, no locking
1401  * ide_drive_t->hwif: constant, no locking
1402  */
1403
1404 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1405
1406 extern struct bus_type ide_bus_type;
1407
1408 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1409 #define ide_id_has_flush_cache(id)      ((id)->cfs_enable_2 & 0x3000)
1410
1411 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1412 #define ide_id_has_flush_cache_ext(id)  \
1413         (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1414
1415 static inline int hwif_to_node(ide_hwif_t *hwif)
1416 {
1417         struct pci_dev *dev = hwif->pci_dev;
1418         return dev ? pcibus_to_node(dev->bus) : -1;
1419 }
1420
1421 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1422 {
1423         ide_hwif_t *hwif        = HWIF(drive);
1424
1425         return &hwif->drives[(drive->dn ^ 1) & 1];
1426 }
1427
1428 #endif /* _IDE_H */