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/ata.h>
  12 #include <linux/blkdev.h>
  13 #include <linux/proc_fs.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/bitops.h>
  16 #include <linux/bio.h>
  17 #include <linux/device.h>
  18 #include <linux/pci.h>
  19 #include <linux/completion.h>
  20 #include <linux/pm.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/mutex.h>
  28
  29 #if defined(CONFIG_CRIS) || defined(CONFIG_FRV)
  30 # define SUPPORT_VLB_SYNC 0
  31 #else
  32 # define SUPPORT_VLB_SYNC 1
  33 #endif
  34
  35 /*
  36  * Used to indicate "no IRQ", should be a value that cannot be an IRQ
  37  * number.
  38  */
  39
  40 #define IDE_NO_IRQ              (-1)
  41
  42 typedef unsigned char   byte;   /* used everywhere */
  43
  44 /*
  45  * Probably not wise to fiddle with these
  46  */
  47 #define ERROR_MAX       8       /* Max read/write errors per sector */
  48 #define ERROR_RESET     3       /* Reset controller every 4th retry */
  49 #define ERROR_RECAL     1       /* Recalibrate every 2nd retry */
  50
  51 #define HWIF(drive)             ((ide_hwif_t *)((drive)->hwif))
  52 #define HWGROUP(drive)          ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  53
  54 /*
  55  * Definitions for accessing IDE controller registers
  56  */
  57 #define IDE_NR_PORTS            (10)
  58
  59 struct ide_io_ports {
  60         unsigned long   data_addr;
  61
  62         union {
  63                 unsigned long error_addr;       /*   read:  error */
  64                 unsigned long feature_addr;     /*  write: feature */
  65         };
  66
  67         unsigned long   nsect_addr;
  68         unsigned long   lbal_addr;
  69         unsigned long   lbam_addr;
  70         unsigned long   lbah_addr;
  71
  72         unsigned long   device_addr;
  73
  74         union {
  75                 unsigned long status_addr;      /*  read: status  */
  76                 unsigned long command_addr;     /* write: command */
  77         };
  78
  79         unsigned long   ctl_addr;
  80
  81         unsigned long   irq_addr;
  82 };
  83
  84 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
  85
  86 #define BAD_R_STAT      (ATA_BUSY | ATA_ERR)
  87 #define BAD_W_STAT      (BAD_R_STAT | ATA_DF)
  88 #define BAD_STAT        (BAD_R_STAT | ATA_DRQ)
  89 #define DRIVE_READY     (ATA_DRDY | ATA_DSC)
  90
  91 #define BAD_CRC         (ATA_ABORTED | ATA_ICRC)
  92
  93 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
  94
  95 #define SATA_STATUS_OFFSET      (0)
  96 #define SATA_ERROR_OFFSET       (1)
  97 #define SATA_CONTROL_OFFSET     (2)
  98
  99 /*
 100  * Our Physical Region Descriptor (PRD) table should be large enough
 101  * to handle the biggest I/O request we are likely to see.  Since requests
 102  * can have no more than 256 sectors, and since the typical blocksize is
 103  * two or more sectors, we could get by with a limit of 128 entries here for
 104  * the usual worst case.  Most requests seem to include some contiguous blocks,
 105  * further reducing the number of table entries required.
 106  *
 107  * The driver reverts to PIO mode for individual requests that exceed
 108  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 109  * 100% of all crazy scenarios here is not necessary.
 110  *
 111  * As it turns out though, we must allocate a full 4KB page for this,
 112  * so the two PRD tables (ide0 & ide1) will each get half of that,
 113  * allowing each to have about 256 entries (8 bytes each) from this.
 114  */
 115 #define PRD_BYTES       8
 116 #define PRD_ENTRIES     256
 117
 118 /*
 119  * Some more useful definitions
 120  */
 121 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
 122 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
 123 #define SECTOR_SIZE     512
 124
 125 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
 126
 127 /*
 128  * Timeouts for various operations:
 129  */
 130 enum {
 131         /* spec allows up to 20ms */
 132         WAIT_DRQ        = HZ / 10,      /* 100ms */
 133         /* some laptops are very slow */
 134         WAIT_READY      = 5 * HZ,       /* 5s */
 135         /* should be less than 3ms (?), if all ATAPI CD is closed at boot */
 136         WAIT_PIDENTIFY  = 10 * HZ,      /* 10s */
 137         /* worst case when spinning up */
 138         WAIT_WORSTCASE  = 30 * HZ,      /* 30s */
 139         /* maximum wait for an IRQ to happen */
 140         WAIT_CMD        = 10 * HZ,      /* 10s */
 141         /* Some drives require a longer IRQ timeout. */
 142         WAIT_FLOPPY_CMD = 50 * HZ,      /* 50s */
 143         /*
 144          * Some drives (for example, Seagate STT3401A Travan) require a very
 145          * long timeout, because they don't return an interrupt or clear their
 146          * BSY bit until after the command completes (even retension commands).
 147          */
 148         WAIT_TAPE_CMD   = 900 * HZ,     /* 900s */
 149         /* minimum sleep time */
 150         WAIT_MIN_SLEEP  = HZ / 50,      /* 20ms */
 151 };
 152
 153 /*
 154  * Op codes for special requests to be handled by ide_special_rq().
 155  * Values should be in the range of 0x20 to 0x3f.
 156  */
 157 #define REQ_DRIVE_RESET         0x20
 158 #define REQ_DEVSET_EXEC         0x21
 159 #define REQ_PARK_HEADS          0x22
 160 #define REQ_UNPARK_HEADS        0x23
 161
 162 /*
 163  * Check for an interrupt and acknowledge the interrupt status
 164  */
 165 struct hwif_s;
 166 typedef int (ide_ack_intr_t)(struct hwif_s *);
 167
 168 /*
 169  * hwif_chipset_t is used to keep track of the specific hardware
 170  * chipset used by each IDE interface, if known.
 171  */
 172 enum {          ide_unknown,    ide_generic,    ide_pci,
 173                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
 174                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
 175                 ide_rz1000,     ide_trm290,
 176                 ide_cmd646,     ide_cy82c693,   ide_4drives,
 177                 ide_pmac,       ide_acorn,
 178                 ide_au1xxx,     ide_palm3710
 179 };
 180
 181 typedef u8 hwif_chipset_t;
 182
 183 /*
 184  * Structure to hold all information about the location of this port
 185  */
 186 typedef struct hw_regs_s {
 187         union {
 188                 struct ide_io_ports     io_ports;
 189                 unsigned long           io_ports_array[IDE_NR_PORTS];
 190         };
 191
 192         int             irq;                    /* our irq number */
 193         ide_ack_intr_t  *ack_intr;              /* acknowledge interrupt */
 194         hwif_chipset_t  chipset;
 195         struct device   *dev, *parent;
 196         unsigned long   config;
 197 } hw_regs_t;
 198
 199 void ide_init_port_data(struct hwif_s *, unsigned int);
 200 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
 201
 202 static inline void ide_std_init_ports(hw_regs_t *hw,
 203                                       unsigned long io_addr,
 204                                       unsigned long ctl_addr)
 205 {
 206         unsigned int i;
 207
 208         for (i = 0; i <= 7; i++)
 209                 hw->io_ports_array[i] = io_addr++;
 210
 211         hw->io_ports.ctl_addr = ctl_addr;
 212 }
 213
 214 /* for IDE PCI controllers in legacy mode, temporary */
 215 static inline int __ide_default_irq(unsigned long base)
 216 {
 217         switch (base) {
 218 #ifdef CONFIG_IA64
 219         case 0x1f0: return isa_irq_to_vector(14);
 220         case 0x170: return isa_irq_to_vector(15);
 221 #else
 222         case 0x1f0: return 14;
 223         case 0x170: return 15;
 224 #endif
 225         }
 226         return 0;
 227 }
 228
 229 #if defined(CONFIG_ARM) || defined(CONFIG_FRV) || defined(CONFIG_M68K) || \
 230     defined(CONFIG_MIPS) || defined(CONFIG_MN10300) || defined(CONFIG_PARISC) \
 231     || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || defined(CONFIG_SPARC64)
 232 #include <asm/ide.h>
 233 #else
 234 #include <asm-generic/ide_iops.h>
 235 #endif
 236
 237 #define MAX_HWIFS       10
 238
 239 /* Currently only m68k, apus and m8xx need it */
 240 #ifndef IDE_ARCH_ACK_INTR
 241 # define ide_ack_intr(hwif) (1)
 242 #endif
 243
 244 /* Currently only Atari needs it */
 245 #ifndef IDE_ARCH_LOCK
 246 # define ide_release_lock()                     do {} while (0)
 247 # define ide_get_lock(hdlr, data)               do {} while (0)
 248 #endif /* IDE_ARCH_LOCK */
 249
 250 /*
 251  * Now for the data we need to maintain per-drive:  ide_drive_t
 252  */
 253
 254 #define ide_scsi        0x21
 255 #define ide_disk        0x20
 256 #define ide_optical     0x7
 257 #define ide_cdrom       0x5
 258 #define ide_tape        0x1
 259 #define ide_floppy      0x0
 260
 261 /*
 262  * Special Driver Flags
 263  *
 264  * set_geometry : respecify drive geometry
 265  * recalibrate  : seek to cyl 0
 266  * set_multmode : set multmode count
 267  * reserved     : unused
 268  */
 269 typedef union {
 270         unsigned all                    : 8;
 271         struct {
 272                 unsigned set_geometry   : 1;
 273                 unsigned recalibrate    : 1;
 274                 unsigned set_multmode   : 1;
 275                 unsigned reserved       : 5;
 276         } b;
 277 } special_t;
 278
 279 /*
 280  * Status returned from various ide_ functions
 281  */
 282 typedef enum {
 283         ide_stopped,    /* no drive operation was started */
 284         ide_started,    /* a drive operation was started, handler was set */
 285 } ide_startstop_t;
 286
 287 enum {
 288         IDE_TFLAG_LBA48                 = (1 << 0),
 289         IDE_TFLAG_FLAGGED               = (1 << 2),
 290         IDE_TFLAG_OUT_DATA              = (1 << 3),
 291         IDE_TFLAG_OUT_HOB_FEATURE       = (1 << 4),
 292         IDE_TFLAG_OUT_HOB_NSECT         = (1 << 5),
 293         IDE_TFLAG_OUT_HOB_LBAL          = (1 << 6),
 294         IDE_TFLAG_OUT_HOB_LBAM          = (1 << 7),
 295         IDE_TFLAG_OUT_HOB_LBAH          = (1 << 8),
 296         IDE_TFLAG_OUT_HOB               = IDE_TFLAG_OUT_HOB_FEATURE |
 297                                           IDE_TFLAG_OUT_HOB_NSECT |
 298                                           IDE_TFLAG_OUT_HOB_LBAL |
 299                                           IDE_TFLAG_OUT_HOB_LBAM |
 300                                           IDE_TFLAG_OUT_HOB_LBAH,
 301         IDE_TFLAG_OUT_FEATURE           = (1 << 9),
 302         IDE_TFLAG_OUT_NSECT             = (1 << 10),
 303         IDE_TFLAG_OUT_LBAL              = (1 << 11),
 304         IDE_TFLAG_OUT_LBAM              = (1 << 12),
 305         IDE_TFLAG_OUT_LBAH              = (1 << 13),
 306         IDE_TFLAG_OUT_TF                = IDE_TFLAG_OUT_FEATURE |
 307                                           IDE_TFLAG_OUT_NSECT |
 308                                           IDE_TFLAG_OUT_LBAL |
 309                                           IDE_TFLAG_OUT_LBAM |
 310                                           IDE_TFLAG_OUT_LBAH,
 311         IDE_TFLAG_OUT_DEVICE            = (1 << 14),
 312         IDE_TFLAG_WRITE                 = (1 << 15),
 313         IDE_TFLAG_FLAGGED_SET_IN_FLAGS  = (1 << 16),
 314         IDE_TFLAG_IN_DATA               = (1 << 17),
 315         IDE_TFLAG_CUSTOM_HANDLER        = (1 << 18),
 316         IDE_TFLAG_DMA_PIO_FALLBACK      = (1 << 19),
 317         IDE_TFLAG_IN_HOB_FEATURE        = (1 << 20),
 318         IDE_TFLAG_IN_HOB_NSECT          = (1 << 21),
 319         IDE_TFLAG_IN_HOB_LBAL           = (1 << 22),
 320         IDE_TFLAG_IN_HOB_LBAM           = (1 << 23),
 321         IDE_TFLAG_IN_HOB_LBAH           = (1 << 24),
 322         IDE_TFLAG_IN_HOB_LBA            = IDE_TFLAG_IN_HOB_LBAL |
 323                                           IDE_TFLAG_IN_HOB_LBAM |
 324                                           IDE_TFLAG_IN_HOB_LBAH,
 325         IDE_TFLAG_IN_HOB                = IDE_TFLAG_IN_HOB_FEATURE |
 326                                           IDE_TFLAG_IN_HOB_NSECT |
 327                                           IDE_TFLAG_IN_HOB_LBA,
 328         IDE_TFLAG_IN_FEATURE            = (1 << 1),
 329         IDE_TFLAG_IN_NSECT              = (1 << 25),
 330         IDE_TFLAG_IN_LBAL               = (1 << 26),
 331         IDE_TFLAG_IN_LBAM               = (1 << 27),
 332         IDE_TFLAG_IN_LBAH               = (1 << 28),
 333         IDE_TFLAG_IN_LBA                = IDE_TFLAG_IN_LBAL |
 334                                           IDE_TFLAG_IN_LBAM |
 335                                           IDE_TFLAG_IN_LBAH,
 336         IDE_TFLAG_IN_TF                 = IDE_TFLAG_IN_NSECT |
 337                                           IDE_TFLAG_IN_LBA,
 338         IDE_TFLAG_IN_DEVICE             = (1 << 29),
 339         IDE_TFLAG_HOB                   = IDE_TFLAG_OUT_HOB |
 340                                           IDE_TFLAG_IN_HOB,
 341         IDE_TFLAG_TF                    = IDE_TFLAG_OUT_TF |
 342                                           IDE_TFLAG_IN_TF,
 343         IDE_TFLAG_DEVICE                = IDE_TFLAG_OUT_DEVICE |
 344                                           IDE_TFLAG_IN_DEVICE,
 345         /* force 16-bit I/O operations */
 346         IDE_TFLAG_IO_16BIT              = (1 << 30),
 347         /* ide_task_t was allocated using kmalloc() */
 348         IDE_TFLAG_DYN                   = (1 << 31),
 349 };
 350
 351 struct ide_taskfile {
 352         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
 353
 354         u8      hob_feature;    /*  1-5: additional data to support LBA48 */
 355         u8      hob_nsect;
 356         u8      hob_lbal;
 357         u8      hob_lbam;
 358         u8      hob_lbah;
 359
 360         u8      data;           /*  6: low data byte (for TASKFILE IOCTL) */
 361
 362         union {                 /*  7: */
 363                 u8 error;       /*   read:  error */
 364                 u8 feature;     /*  write: feature */
 365         };
 366
 367         u8      nsect;          /*  8: number of sectors */
 368         u8      lbal;           /*  9: LBA low */
 369         u8      lbam;           /* 10: LBA mid */
 370         u8      lbah;           /* 11: LBA high */
 371
 372         u8      device;         /* 12: device select */
 373
 374         union {                 /* 13: */
 375                 u8 status;      /*  read: status  */
 376                 u8 command;     /* write: command */
 377         };
 378 };
 379
 380 typedef struct ide_task_s {
 381         union {
 382                 struct ide_taskfile     tf;
 383                 u8                      tf_array[14];
 384         };
 385         u32                     tf_flags;
 386         int                     data_phase;
 387         struct request          *rq;            /* copy of request */
 388         void                    *special;       /* valid_t generally */
 389 } ide_task_t;
 390
 391 /* ATAPI packet command flags */
 392 enum {
 393         /* set when an error is considered normal - no retry (ide-tape) */
 394         PC_FLAG_ABORT                   = (1 << 0),
 395         PC_FLAG_SUPPRESS_ERROR          = (1 << 1),
 396         PC_FLAG_WAIT_FOR_DSC            = (1 << 2),
 397         PC_FLAG_DMA_OK                  = (1 << 3),
 398         PC_FLAG_DMA_IN_PROGRESS         = (1 << 4),
 399         PC_FLAG_DMA_ERROR               = (1 << 5),
 400         PC_FLAG_WRITING                 = (1 << 6),
 401         /* command timed out */
 402         PC_FLAG_TIMEDOUT                = (1 << 7),
 403 };
 404
 405 /*
 406  * With each packet command, we allocate a buffer of IDE_PC_BUFFER_SIZE bytes.
 407  * This is used for several packet commands (not for READ/WRITE commands).
 408  */
 409 #define IDE_PC_BUFFER_SIZE      256
 410
 411 struct ide_atapi_pc {
 412         /* actual packet bytes */
 413         u8 c[12];
 414         /* incremented on each retry */
 415         int retries;
 416         int error;
 417
 418         /* bytes to transfer */
 419         int req_xfer;
 420         /* bytes actually transferred */
 421         int xferred;
 422
 423         /* data buffer */
 424         u8 *buf;
 425         /* current buffer position */
 426         u8 *cur_pos;
 427         int buf_size;
 428         /* missing/available data on the current buffer */
 429         int b_count;
 430
 431         /* the corresponding request */
 432         struct request *rq;
 433
 434         unsigned long flags;
 435
 436         /*
 437          * those are more or less driver-specific and some of them are subject
 438          * to change/removal later.
 439          */
 440         u8 pc_buf[IDE_PC_BUFFER_SIZE];
 441
 442         /* idetape only */
 443         struct idetape_bh *bh;
 444         char *b_data;
 445
 446         /* idescsi only for now */
 447         struct scatterlist *sg;
 448         unsigned int sg_cnt;
 449
 450         struct scsi_cmnd *scsi_cmd;
 451         void (*done) (struct scsi_cmnd *);
 452
 453         unsigned long timeout;
 454 };
 455
 456 struct ide_devset;
 457 struct ide_driver_s;
 458
 459 #ifdef CONFIG_BLK_DEV_IDEACPI
 460 struct ide_acpi_drive_link;
 461 struct ide_acpi_hwif_link;
 462 #endif
 463
 464 /* ATAPI device flags */
 465 enum {
 466         IDE_AFLAG_DRQ_INTERRUPT         = (1 << 0),
 467         IDE_AFLAG_MEDIA_CHANGED         = (1 << 1),
 468         /* Drive cannot lock the door. */
 469         IDE_AFLAG_NO_DOORLOCK           = (1 << 2),
 470
 471         /* ide-cd */
 472         /* Drive cannot eject the disc. */
 473         IDE_AFLAG_NO_EJECT              = (1 << 3),
 474         /* Drive is a pre ATAPI 1.2 drive. */
 475         IDE_AFLAG_PRE_ATAPI12           = (1 << 4),
 476         /* TOC addresses are in BCD. */
 477         IDE_AFLAG_TOCADDR_AS_BCD        = (1 << 5),
 478         /* TOC track numbers are in BCD. */
 479         IDE_AFLAG_TOCTRACKS_AS_BCD      = (1 << 6),
 480         /*
 481          * Drive does not provide data in multiples of SECTOR_SIZE
 482          * when more than one interrupt is needed.
 483          */
 484         IDE_AFLAG_LIMIT_NFRAMES         = (1 << 7),
 485         /* Seeking in progress. */
 486         IDE_AFLAG_SEEKING               = (1 << 8),
 487         /* Saved TOC information is current. */
 488         IDE_AFLAG_TOC_VALID             = (1 << 9),
 489         /* We think that the drive door is locked. */
 490         IDE_AFLAG_DOOR_LOCKED           = (1 << 10),
 491         /* SET_CD_SPEED command is unsupported. */
 492         IDE_AFLAG_NO_SPEED_SELECT       = (1 << 11),
 493         IDE_AFLAG_VERTOS_300_SSD        = (1 << 12),
 494         IDE_AFLAG_VERTOS_600_ESD        = (1 << 13),
 495         IDE_AFLAG_SANYO_3CD             = (1 << 14),
 496         IDE_AFLAG_FULL_CAPS_PAGE        = (1 << 15),
 497         IDE_AFLAG_PLAY_AUDIO_OK         = (1 << 16),
 498         IDE_AFLAG_LE_SPEED_FIELDS       = (1 << 17),
 499
 500         /* ide-floppy */
 501         /* Format in progress */
 502         IDE_AFLAG_FORMAT_IN_PROGRESS    = (1 << 18),
 503         /* Avoid commands not supported in Clik drive */
 504         IDE_AFLAG_CLIK_DRIVE            = (1 << 19),
 505         /* Requires BH algorithm for packets */
 506         IDE_AFLAG_ZIP_DRIVE             = (1 << 20),
 507         /* Write protect */
 508         IDE_AFLAG_WP                    = (1 << 21),
 509         /* Supports format progress report */
 510         IDE_AFLAG_SRFP                  = (1 << 22),
 511
 512         /* ide-tape */
 513         IDE_AFLAG_IGNORE_DSC            = (1 << 23),
 514         /* 0 When the tape position is unknown */
 515         IDE_AFLAG_ADDRESS_VALID         = (1 << 24),
 516         /* Device already opened */
 517         IDE_AFLAG_BUSY                  = (1 << 25),
 518         /* Attempt to auto-detect the current user block size */
 519         IDE_AFLAG_DETECT_BS             = (1 << 26),
 520         /* Currently on a filemark */
 521         IDE_AFLAG_FILEMARK              = (1 << 27),
 522         /* 0 = no tape is loaded, so we don't rewind after ejecting */
 523         IDE_AFLAG_MEDIUM_PRESENT        = (1 << 28),
 524
 525         IDE_AFLAG_NO_AUTOCLOSE          = (1 << 29),
 526 };
 527
 528 /* device flags */
 529 enum {
 530         /* restore settings after device reset */
 531         IDE_DFLAG_KEEP_SETTINGS         = (1 << 0),
 532         /* device is using DMA for read/write */
 533         IDE_DFLAG_USING_DMA             = (1 << 1),
 534         /* okay to unmask other IRQs */
 535         IDE_DFLAG_UNMASK                = (1 << 2),
 536         /* don't attempt flushes */
 537         IDE_DFLAG_NOFLUSH               = (1 << 3),
 538         /* DSC overlap */
 539         IDE_DFLAG_DSC_OVERLAP           = (1 << 4),
 540         /* give potential excess bandwidth */
 541         IDE_DFLAG_NICE1                 = (1 << 5),
 542         /* device is physically present */
 543         IDE_DFLAG_PRESENT               = (1 << 6),
 544         /* device ejected hint */
 545         IDE_DFLAG_DEAD                  = (1 << 7),
 546         /* id read from device (synthetic if not set) */
 547         IDE_DFLAG_ID_READ               = (1 << 8),
 548         IDE_DFLAG_NOPROBE               = (1 << 9),
 549         /* need to do check_media_change() */
 550         IDE_DFLAG_REMOVABLE             = (1 << 10),
 551         /* needed for removable devices */
 552         IDE_DFLAG_ATTACH                = (1 << 11),
 553         IDE_DFLAG_FORCED_GEOM           = (1 << 12),
 554         /* disallow setting unmask bit */
 555         IDE_DFLAG_NO_UNMASK             = (1 << 13),
 556         /* disallow enabling 32-bit I/O */
 557         IDE_DFLAG_NO_IO_32BIT           = (1 << 14),
 558         /* for removable only: door lock/unlock works */
 559         IDE_DFLAG_DOORLOCKING           = (1 << 15),
 560         /* disallow DMA */
 561         IDE_DFLAG_NODMA                 = (1 << 16),
 562         /* powermanagment told us not to do anything, so sleep nicely */
 563         IDE_DFLAG_BLOCKED               = (1 << 17),
 564         /* ide-scsi emulation */
 565         IDE_DFLAG_SCSI                  = (1 << 18),
 566         /* sleeping & sleep field valid */
 567         IDE_DFLAG_SLEEPING              = (1 << 19),
 568         IDE_DFLAG_POST_RESET            = (1 << 20),
 569         IDE_DFLAG_UDMA33_WARNED         = (1 << 21),
 570         IDE_DFLAG_LBA48                 = (1 << 22),
 571         /* status of write cache */
 572         IDE_DFLAG_WCACHE                = (1 << 23),
 573         /* used for ignoring ATA_DF */
 574         IDE_DFLAG_NOWERR                = (1 << 24),
 575         /* retrying in PIO */
 576         IDE_DFLAG_DMA_PIO_RETRY         = (1 << 25),
 577         IDE_DFLAG_LBA                   = (1 << 26),
 578         /* don't unload heads */
 579         IDE_DFLAG_NO_UNLOAD             = (1 << 27),
 580         /* heads unloaded, please don't reset port */
 581         IDE_DFLAG_PARKED                = (1 << 28)
 582 };
 583
 584 struct ide_drive_s {
 585         char            name[4];        /* drive name, such as "hda" */
 586         char            driver_req[10]; /* requests specific driver */
 587
 588         struct request_queue    *queue; /* request queue */
 589
 590         struct request          *rq;    /* current request */
 591         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 592         void            *driver_data;   /* extra driver data */
 593         u16                     *id;    /* identification info */
 594 #ifdef CONFIG_IDE_PROC_FS
 595         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 596         const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
 597 #endif
 598         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 599
 600         unsigned long dev_flags;
 601
 602         unsigned long sleep;            /* sleep until this time */
 603         unsigned long service_start;    /* time we started last request */
 604         unsigned long service_time;     /* service time of last request */
 605         unsigned long timeout;          /* max time to wait for irq */
 606
 607         special_t       special;        /* special action flags */
 608
 609         u8      select;                 /* basic drive/head select reg value */
 610         u8      retry_pio;              /* retrying dma capable host in pio */
 611         u8      waiting_for_dma;        /* dma currently in progress */
 612         u8      dma;                    /* atapi dma flag */
 613
 614         u8      quirk_list;     /* considered quirky, set for a specific host */
 615         u8      init_speed;     /* transfer rate set at boot */
 616         u8      current_speed;  /* current transfer rate set */
 617         u8      desired_speed;  /* desired transfer rate set */
 618         u8      dn;             /* now wide spread use */
 619         u8      acoustic;       /* acoustic management */
 620         u8      media;          /* disk, cdrom, tape, floppy, ... */
 621         u8      ready_stat;     /* min status value for drive ready */
 622         u8      mult_count;     /* current multiple sector setting */
 623         u8      mult_req;       /* requested multiple sector setting */
 624         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 625         u8      bad_wstat;      /* used for ignoring ATA_DF */
 626         u8      head;           /* "real" number of heads */
 627         u8      sect;           /* "real" sectors per track */
 628         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 629         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 630
 631         /* delay this long before sending packet command */
 632         u8 pc_delay;
 633
 634         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 635         unsigned int    cyl;            /* "real" number of cyls */
 636         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 637         unsigned int    failures;       /* current failure count */
 638         unsigned int    max_failures;   /* maximum allowed failure count */
 639         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 640
 641         u64             capacity64;     /* total number of sectors */
 642
 643         int             lun;            /* logical unit */
 644         int             crc_count;      /* crc counter to reduce drive speed */
 645
 646         unsigned long   debug_mask;     /* debugging levels switch */
 647
 648 #ifdef CONFIG_BLK_DEV_IDEACPI
 649         struct ide_acpi_drive_link *acpidata;
 650 #endif
 651         struct list_head list;
 652         struct device   gendev;
 653         struct completion gendev_rel_comp;      /* to deal with device release() */
 654
 655         /* current packet command */
 656         struct ide_atapi_pc *pc;
 657
 658         /* callback for packet commands */
 659         void (*pc_callback)(struct ide_drive_s *, int);
 660
 661         void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
 662         int  (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
 663                               unsigned int, int);
 664
 665         unsigned long atapi_flags;
 666
 667         struct ide_atapi_pc request_sense_pc;
 668         struct request request_sense_rq;
 669 };
 670
 671 typedef struct ide_drive_s ide_drive_t;
 672
 673 #define to_ide_device(dev)              container_of(dev, ide_drive_t, gendev)
 674
 675 #define to_ide_drv(obj, cont_type)      \
 676         container_of(obj, struct cont_type, kref)
 677
 678 #define ide_drv_g(disk, cont_type)      \
 679         container_of((disk)->private_data, struct cont_type, driver)
 680
 681 struct ide_port_info;
 682
 683 struct ide_tp_ops {
 684         void    (*exec_command)(struct hwif_s *, u8);
 685         u8      (*read_status)(struct hwif_s *);
 686         u8      (*read_altstatus)(struct hwif_s *);
 687         u8      (*read_sff_dma_status)(struct hwif_s *);
 688
 689         void    (*set_irq)(struct hwif_s *, int);
 690
 691         void    (*tf_load)(ide_drive_t *, struct ide_task_s *);
 692         void    (*tf_read)(ide_drive_t *, struct ide_task_s *);
 693
 694         void    (*input_data)(ide_drive_t *, struct request *, void *,
 695                               unsigned int);
 696         void    (*output_data)(ide_drive_t *, struct request *, void *,
 697                                unsigned int);
 698 };
 699
 700 extern const struct ide_tp_ops default_tp_ops;
 701
 702 /**
 703  * struct ide_port_ops - IDE port operations
 704  *
 705  * @init_dev:           host specific initialization of a device
 706  * @set_pio_mode:       routine to program host for PIO mode
 707  * @set_dma_mode:       routine to program host for DMA mode
 708  * @selectproc:         tweaks hardware to select drive
 709  * @reset_poll:         chipset polling based on hba specifics
 710  * @pre_reset:          chipset specific changes to default for device-hba resets
 711  * @resetproc:          routine to reset controller after a disk reset
 712  * @maskproc:           special host masking for drive selection
 713  * @quirkproc:          check host's drive quirk list
 714  * @clear_irq:          clear IRQ
 715  *
 716  * @mdma_filter:        filter MDMA modes
 717  * @udma_filter:        filter UDMA modes
 718  *
 719  * @cable_detect:       detect cable type
 720  */
 721 struct ide_port_ops {
 722         void    (*init_dev)(ide_drive_t *);
 723         void    (*set_pio_mode)(ide_drive_t *, const u8);
 724         void    (*set_dma_mode)(ide_drive_t *, const u8);
 725         void    (*selectproc)(ide_drive_t *);
 726         int     (*reset_poll)(ide_drive_t *);
 727         void    (*pre_reset)(ide_drive_t *);
 728         void    (*resetproc)(ide_drive_t *);
 729         void    (*maskproc)(ide_drive_t *, int);
 730         void    (*quirkproc)(ide_drive_t *);
 731         void    (*clear_irq)(ide_drive_t *);
 732
 733         u8      (*mdma_filter)(ide_drive_t *);
 734         u8      (*udma_filter)(ide_drive_t *);
 735
 736         u8      (*cable_detect)(struct hwif_s *);
 737 };
 738
 739 struct ide_dma_ops {
 740         void    (*dma_host_set)(struct ide_drive_s *, int);
 741         int     (*dma_setup)(struct ide_drive_s *);
 742         void    (*dma_exec_cmd)(struct ide_drive_s *, u8);
 743         void    (*dma_start)(struct ide_drive_s *);
 744         int     (*dma_end)(struct ide_drive_s *);
 745         int     (*dma_test_irq)(struct ide_drive_s *);
 746         void    (*dma_lost_irq)(struct ide_drive_s *);
 747         void    (*dma_timeout)(struct ide_drive_s *);
 748 };
 749
 750 struct ide_host;
 751
 752 typedef struct hwif_s {
 753         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 754         struct hwif_s *mate;            /* other hwif from same PCI chip */
 755         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 756         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 757
 758         struct ide_host *host;
 759
 760         char name[6];                   /* name of interface, eg. "ide0" */
 761
 762         struct ide_io_ports     io_ports;
 763
 764         unsigned long   sata_scr[SATA_NR_PORTS];
 765
 766         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 767
 768         u8 major;       /* our major number */
 769         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 770         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 771
 772         u32 host_flags;
 773
 774         u8 pio_mask;
 775
 776         u8 ultra_mask;
 777         u8 mwdma_mask;
 778         u8 swdma_mask;
 779
 780         u8 cbl;         /* cable type */
 781
 782         hwif_chipset_t chipset; /* sub-module for tuning.. */
 783
 784         struct device *dev;
 785
 786         ide_ack_intr_t *ack_intr;
 787
 788         void (*rw_disk)(ide_drive_t *, struct request *);
 789
 790         const struct ide_tp_ops         *tp_ops;
 791         const struct ide_port_ops       *port_ops;
 792         const struct ide_dma_ops        *dma_ops;
 793
 794         /* dma physical region descriptor table (cpu view) */
 795         unsigned int    *dmatable_cpu;
 796         /* dma physical region descriptor table (dma view) */
 797         dma_addr_t      dmatable_dma;
 798
 799         /* maximum number of PRD table entries */
 800         int prd_max_nents;
 801         /* PRD entry size in bytes */
 802         int prd_ent_size;
 803
 804         /* Scatter-gather list used to build the above */
 805         struct scatterlist *sg_table;
 806         int sg_max_nents;               /* Maximum number of entries in it */
 807         int sg_nents;                   /* Current number of entries in it */
 808         int sg_dma_direction;           /* dma transfer direction */
 809
 810         /* data phase of the active command (currently only valid for PIO/DMA) */
 811         int             data_phase;
 812
 813         struct ide_task_s task;         /* current command */
 814
 815         unsigned int nsect;
 816         unsigned int nleft;
 817         struct scatterlist *cursg;
 818         unsigned int cursg_ofs;
 819
 820         int             rqsize;         /* max sectors per request */
 821         int             irq;            /* our irq number */
 822
 823         unsigned long   dma_base;       /* base addr for dma ports */
 824
 825         unsigned long   config_data;    /* for use by chipset-specific code */
 826         unsigned long   select_data;    /* for use by chipset-specific code */
 827
 828         unsigned long   extra_base;     /* extra addr for dma ports */
 829         unsigned        extra_ports;    /* number of extra dma ports */
 830
 831         unsigned        present    : 1; /* this interface exists */
 832         unsigned        serialized : 1; /* serialized all channel operation */
 833         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 834         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 835
 836         struct device           gendev;
 837         struct device           *portdev;
 838
 839         struct completion gendev_rel_comp; /* To deal with device release() */
 840
 841         void            *hwif_data;     /* extra hwif data */
 842
 843 #ifdef CONFIG_BLK_DEV_IDEACPI
 844         struct ide_acpi_hwif_link *acpidata;
 845 #endif
 846 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 847
 848 #define MAX_HOST_PORTS 4
 849
 850 struct ide_host {
 851         ide_hwif_t      *ports[MAX_HOST_PORTS];
 852         unsigned int    n_ports;
 853         struct device   *dev[2];
 854         unsigned int    (*init_chipset)(struct pci_dev *);
 855         unsigned long   host_flags;
 856         void            *host_priv;
 857 };
 858
 859 /*
 860  *  internal ide interrupt handler type
 861  */
 862 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 863 typedef int (ide_expiry_t)(ide_drive_t *);
 864
 865 /* used by ide-cd, ide-floppy, etc. */
 866 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
 867
 868 typedef struct hwgroup_s {
 869                 /* irq handler, if active */
 870         ide_startstop_t (*handler)(ide_drive_t *);
 871
 872                 /* BOOL: protects all fields below */
 873         volatile int busy;
 874                 /* BOOL: wake us up on timer expiry */
 875         unsigned int sleeping   : 1;
 876                 /* BOOL: polling active & poll_timeout field valid */
 877         unsigned int polling    : 1;
 878
 879                 /* current drive */
 880         ide_drive_t *drive;
 881                 /* ptr to current hwif in linked-list */
 882         ide_hwif_t *hwif;
 883
 884                 /* current request */
 885         struct request *rq;
 886
 887                 /* failsafe timer */
 888         struct timer_list timer;
 889                 /* timeout value during long polls */
 890         unsigned long poll_timeout;
 891                 /* queried upon timeouts */
 892         int (*expiry)(ide_drive_t *);
 893
 894         int req_gen;
 895         int req_gen_timer;
 896 } ide_hwgroup_t;
 897
 898 typedef struct ide_driver_s ide_driver_t;
 899
 900 extern struct mutex ide_setting_mtx;
 901
 902 /*
 903  * configurable drive settings
 904  */
 905
 906 #define DS_SYNC (1 << 0)
 907
 908 struct ide_devset {
 909         int             (*get)(ide_drive_t *);
 910         int             (*set)(ide_drive_t *, int);
 911         unsigned int    flags;
 912 };
 913
 914 #define __DEVSET(_flags, _get, _set) { \
 915         .flags  = _flags, \
 916         .get    = _get, \
 917         .set    = _set, \
 918 }
 919
 920 #define ide_devset_get(name, field) \
 921 static int get_##name(ide_drive_t *drive) \
 922 { \
 923         return drive->field; \
 924 }
 925
 926 #define ide_devset_set(name, field) \
 927 static int set_##name(ide_drive_t *drive, int arg) \
 928 { \
 929         drive->field = arg; \
 930         return 0; \
 931 }
 932
 933 #define ide_devset_get_flag(name, flag) \
 934 static int get_##name(ide_drive_t *drive) \
 935 { \
 936         return !!(drive->dev_flags & flag); \
 937 }
 938
 939 #define ide_devset_set_flag(name, flag) \
 940 static int set_##name(ide_drive_t *drive, int arg) \
 941 { \
 942         if (arg) \
 943                 drive->dev_flags |= flag; \
 944         else \
 945                 drive->dev_flags &= ~flag; \
 946         return 0; \
 947 }
 948
 949 #define __IDE_DEVSET(_name, _flags, _get, _set) \
 950 const struct ide_devset ide_devset_##_name = \
 951         __DEVSET(_flags, _get, _set)
 952
 953 #define IDE_DEVSET(_name, _flags, _get, _set) \
 954 static __IDE_DEVSET(_name, _flags, _get, _set)
 955
 956 #define ide_devset_rw(_name, _func) \
 957 IDE_DEVSET(_name, 0, get_##_func, set_##_func)
 958
 959 #define ide_devset_w(_name, _func) \
 960 IDE_DEVSET(_name, 0, NULL, set_##_func)
 961
 962 #define ide_ext_devset_rw(_name, _func) \
 963 __IDE_DEVSET(_name, 0, get_##_func, set_##_func)
 964
 965 #define ide_ext_devset_rw_sync(_name, _func) \
 966 __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
 967
 968 #define ide_decl_devset(_name) \
 969 extern const struct ide_devset ide_devset_##_name
 970
 971 ide_decl_devset(io_32bit);
 972 ide_decl_devset(keepsettings);
 973 ide_decl_devset(pio_mode);
 974 ide_decl_devset(unmaskirq);
 975 ide_decl_devset(using_dma);
 976
 977 #ifdef CONFIG_IDE_PROC_FS
 978 /*
 979  * /proc/ide interface
 980  */
 981
 982 #define ide_devset_rw_field(_name, _field) \
 983 ide_devset_get(_name, _field); \
 984 ide_devset_set(_name, _field); \
 985 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
 986
 987 #define ide_devset_rw_flag(_name, _field) \
 988 ide_devset_get_flag(_name, _field); \
 989 ide_devset_set_flag(_name, _field); \
 990 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
 991
 992 struct ide_proc_devset {
 993         const char              *name;
 994         const struct ide_devset *setting;
 995         int                     min, max;
 996         int                     (*mulf)(ide_drive_t *);
 997         int                     (*divf)(ide_drive_t *);
 998 };
 999
1000 #define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
1001         .name = __stringify(_name), \
1002         .setting = &ide_devset_##_name, \
1003         .min = _min, \
1004         .max = _max, \
1005         .mulf = _mulf, \
1006         .divf = _divf, \
1007 }
1008
1009 #define IDE_PROC_DEVSET(_name, _min, _max) \
1010 __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
1011
1012 typedef struct {
1013         const char      *name;
1014         mode_t          mode;
1015         read_proc_t     *read_proc;
1016         write_proc_t    *write_proc;
1017 } ide_proc_entry_t;
1018
1019 void proc_ide_create(void);
1020 void proc_ide_destroy(void);
1021 void ide_proc_register_port(ide_hwif_t *);
1022 void ide_proc_port_register_devices(ide_hwif_t *);
1023 void ide_proc_unregister_device(ide_drive_t *);
1024 void ide_proc_unregister_port(ide_hwif_t *);
1025 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
1026 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
1027
1028 read_proc_t proc_ide_read_capacity;
1029 read_proc_t proc_ide_read_geometry;
1030
1031 /*
1032  * Standard exit stuff:
1033  */
1034 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
1035 {                                       \
1036         len -= off;                     \
1037         if (len < count) {              \
1038                 *eof = 1;               \
1039                 if (len <= 0)           \
1040                         return 0;       \
1041         } else                          \
1042                 len = count;            \
1043         *start = page + off;            \
1044         return len;                     \
1045 }
1046 #else
1047 static inline void proc_ide_create(void) { ; }
1048 static inline void proc_ide_destroy(void) { ; }
1049 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
1050 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
1051 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
1052 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
1053 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1054 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1055 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
1056 #endif
1057
1058 enum {
1059         /* enter/exit functions */
1060         IDE_DBG_FUNC =                  (1 << 0),
1061         /* sense key/asc handling */
1062         IDE_DBG_SENSE =                 (1 << 1),
1063         /* packet commands handling */
1064         IDE_DBG_PC =                    (1 << 2),
1065         /* request handling */
1066         IDE_DBG_RQ =                    (1 << 3),
1067         /* driver probing/setup */
1068         IDE_DBG_PROBE =                 (1 << 4),
1069 };
1070
1071 /* DRV_NAME has to be defined in the driver before using the macro below */
1072 #define __ide_debug_log(lvl, fmt, args...)                      \
1073 {                                                               \
1074         if (unlikely(drive->debug_mask & lvl))                  \
1075                 printk(KERN_INFO DRV_NAME ": " fmt, ## args);   \
1076 }
1077
1078 /*
1079  * Power Management state machine (rq->pm->pm_step).
1080  *
1081  * For each step, the core calls ide_start_power_step() first.
1082  * This can return:
1083  *      - ide_stopped : In this case, the core calls us back again unless
1084  *                      step have been set to ide_power_state_completed.
1085  *      - ide_started : In this case, the channel is left busy until an
1086  *                      async event (interrupt) occurs.
1087  * Typically, ide_start_power_step() will issue a taskfile request with
1088  * do_rw_taskfile().
1089  *
1090  * Upon reception of the interrupt, the core will call ide_complete_power_step()
1091  * with the error code if any. This routine should update the step value
1092  * and return. It should not start a new request. The core will call
1093  * ide_start_power_step() for the new step value, unless step have been
1094  * set to IDE_PM_COMPLETED.
1095  */
1096 enum {
1097         IDE_PM_START_SUSPEND,
1098         IDE_PM_FLUSH_CACHE      = IDE_PM_START_SUSPEND,
1099         IDE_PM_STANDBY,
1100
1101         IDE_PM_START_RESUME,
1102         IDE_PM_RESTORE_PIO      = IDE_PM_START_RESUME,
1103         IDE_PM_IDLE,
1104         IDE_PM_RESTORE_DMA,
1105
1106         IDE_PM_COMPLETED,
1107 };
1108
1109 /*
1110  * Subdrivers support.
1111  *
1112  * The gendriver.owner field should be set to the module owner of this driver.
1113  * The gendriver.name field should be set to the name of this driver
1114  */
1115 struct ide_driver_s {
1116         const char                      *version;
1117         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1118         int             (*end_request)(ide_drive_t *, int, int);
1119         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
1120         struct device_driver    gen_driver;
1121         int             (*probe)(ide_drive_t *);
1122         void            (*remove)(ide_drive_t *);
1123         void            (*resume)(ide_drive_t *);
1124         void            (*shutdown)(ide_drive_t *);
1125 #ifdef CONFIG_IDE_PROC_FS
1126         ide_proc_entry_t                *proc;
1127         const struct ide_proc_devset    *settings;
1128 #endif
1129 };
1130
1131 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
1132
1133 int ide_device_get(ide_drive_t *);
1134 void ide_device_put(ide_drive_t *);
1135
1136 struct ide_ioctl_devset {
1137         unsigned int    get_ioctl;
1138         unsigned int    set_ioctl;
1139         const struct ide_devset *setting;
1140 };
1141
1142 int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
1143                       unsigned long, const struct ide_ioctl_devset *);
1144
1145 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *,
1146                       unsigned, unsigned long);
1147
1148 extern int ide_vlb_clk;
1149 extern int ide_pci_clk;
1150
1151 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1152 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1153                              int uptodate, int nr_sectors);
1154
1155 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1156
1157 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
1158                          ide_expiry_t *);
1159
1160 void ide_execute_pkt_cmd(ide_drive_t *);
1161
1162 void ide_pad_transfer(ide_drive_t *, int, int);
1163
1164 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1165
1166 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1167
1168 void ide_fix_driveid(u16 *);
1169
1170 extern void ide_fixstring(u8 *, const int, const int);
1171
1172 int ide_busy_sleep(ide_hwif_t *, unsigned long, int);
1173
1174 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1175
1176 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1177
1178 extern int ide_devset_execute(ide_drive_t *drive,
1179                               const struct ide_devset *setting, int arg);
1180
1181 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
1182
1183 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1184
1185 void ide_tf_dump(const char *, struct ide_taskfile *);
1186
1187 void ide_exec_command(ide_hwif_t *, u8);
1188 u8 ide_read_status(ide_hwif_t *);
1189 u8 ide_read_altstatus(ide_hwif_t *);
1190 u8 ide_read_sff_dma_status(ide_hwif_t *);
1191
1192 void ide_set_irq(ide_hwif_t *, int);
1193
1194 void ide_tf_load(ide_drive_t *, ide_task_t *);
1195 void ide_tf_read(ide_drive_t *, ide_task_t *);
1196
1197 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
1198 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
1199
1200 int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
1201
1202 extern void SELECT_DRIVE(ide_drive_t *);
1203 void SELECT_MASK(ide_drive_t *, int);
1204
1205 u8 ide_read_error(ide_drive_t *);
1206 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1207
1208 extern int drive_is_ready(ide_drive_t *);
1209
1210 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
1211
1212 int ide_check_atapi_device(ide_drive_t *, const char *);
1213
1214 void ide_init_pc(struct ide_atapi_pc *);
1215
1216 /* Disk head parking */
1217 extern wait_queue_head_t ide_park_wq;
1218 ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
1219                       char *buf);
1220 ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
1221                        const char *buf, size_t len);
1222
1223 /*
1224  * Special requests for ide-tape block device strategy routine.
1225  *
1226  * In order to service a character device command, we add special requests to
1227  * the tail of our block device request queue and wait for their completion.
1228  */
1229 enum {
1230         REQ_IDETAPE_PC1         = (1 << 0), /* packet command (first stage) */
1231         REQ_IDETAPE_PC2         = (1 << 1), /* packet command (second stage) */
1232         REQ_IDETAPE_READ        = (1 << 2),
1233         REQ_IDETAPE_WRITE       = (1 << 3),
1234 };
1235
1236 int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
1237
1238 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
1239 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
1240 int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
1241 void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
1242 void ide_retry_pc(ide_drive_t *, struct gendisk *);
1243
1244 static inline unsigned long ide_scsi_get_timeout(struct ide_atapi_pc *pc)
1245 {
1246         return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
1247 }
1248
1249 int ide_scsi_expiry(ide_drive_t *);
1250
1251 ide_startstop_t ide_issue_pc(ide_drive_t *, unsigned int, ide_expiry_t *);
1252
1253 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1254
1255 void task_end_request(ide_drive_t *, struct request *, u8);
1256
1257 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
1258 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1259
1260 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1261
1262 extern int ide_driveid_update(ide_drive_t *);
1263 extern int ide_config_drive_speed(ide_drive_t *, u8);
1264 extern u8 eighty_ninty_three (ide_drive_t *);
1265 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1266
1267 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1268
1269 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1270
1271 extern void ide_timer_expiry(unsigned long);
1272 extern irqreturn_t ide_intr(int irq, void *dev_id);
1273 extern void do_ide_request(struct request_queue *);
1274
1275 void ide_init_disk(struct gendisk *, ide_drive_t *);
1276
1277 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1278 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1279 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1280 #else
1281 #define ide_pci_register_driver(d) pci_register_driver(d)
1282 #endif
1283
1284 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1285                          hw_regs_t *, hw_regs_t **);
1286 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1287
1288 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1289 int ide_pci_set_master(struct pci_dev *, const char *);
1290 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1291 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1292 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1293 #else
1294 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1295                                      const struct ide_port_info *d)
1296 {
1297         return -EINVAL;
1298 }
1299 #endif
1300
1301 typedef struct ide_pci_enablebit_s {
1302         u8      reg;    /* byte pci reg holding the enable-bit */
1303         u8      mask;   /* mask to isolate the enable-bit */
1304         u8      val;    /* value of masked reg when "enabled" */
1305 } ide_pci_enablebit_t;
1306
1307 enum {
1308         /* Uses ISA control ports not PCI ones. */
1309         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1310         /* single port device */
1311         IDE_HFLAG_SINGLE                = (1 << 1),
1312         /* don't use legacy PIO blacklist */
1313         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1314         /* set for the second port of QD65xx */
1315         IDE_HFLAG_QD_2ND_PORT           = (1 << 3),
1316         /* use PIO8/9 for prefetch off/on */
1317         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1318         /* use PIO6/7 for fast-devsel off/on */
1319         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1320         /* use 100-102 and 200-202 PIO values to set DMA modes */
1321         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1322         /*
1323          * keep DMA setting when programming PIO mode, may be used only
1324          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1325          */
1326         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1327         /* program host for the transfer mode after programming device */
1328         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1329         /* don't program host/device for the transfer mode ("smart" hosts) */
1330         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1331         /* trust BIOS for programming chipset/device for DMA */
1332         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1333         /* host is CS5510/CS5520 */
1334         IDE_HFLAG_CS5520                = (1 << 11),
1335         /* ATAPI DMA is unsupported */
1336         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1337         /* set if host is a "non-bootable" controller */
1338         IDE_HFLAG_NON_BOOTABLE          = (1 << 13),
1339         /* host doesn't support DMA */
1340         IDE_HFLAG_NO_DMA                = (1 << 14),
1341         /* check if host is PCI IDE device before allowing DMA */
1342         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1343         /* host uses MMIO */
1344         IDE_HFLAG_MMIO                  = (1 << 16),
1345         /* no LBA48 */
1346         IDE_HFLAG_NO_LBA48              = (1 << 17),
1347         /* no LBA48 DMA */
1348         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1349         /* data FIFO is cleared by an error */
1350         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1351         /* serialize ports */
1352         IDE_HFLAG_SERIALIZE             = (1 << 20),
1353         /* use legacy IRQs */
1354         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1355         /* force use of legacy IRQs */
1356         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1357         /* limit LBA48 requests to 256 sectors */
1358         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1359         /* use 32-bit I/O ops */
1360         IDE_HFLAG_IO_32BIT              = (1 << 24),
1361         /* unmask IRQs */
1362         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1363         /* serialize ports if DMA is possible (for sl82c105) */
1364         IDE_HFLAG_SERIALIZE_DMA         = (1 << 27),
1365         /* force host out of "simplex" mode */
1366         IDE_HFLAG_CLEAR_SIMPLEX         = (1 << 28),
1367         /* DSC overlap is unsupported */
1368         IDE_HFLAG_NO_DSC                = (1 << 29),
1369         /* never use 32-bit I/O ops */
1370         IDE_HFLAG_NO_IO_32BIT           = (1 << 30),
1371         /* never unmask IRQs */
1372         IDE_HFLAG_NO_UNMASK_IRQS        = (1 << 31),
1373 };
1374
1375 #ifdef CONFIG_BLK_DEV_OFFBOARD
1376 # define IDE_HFLAG_OFF_BOARD    0
1377 #else
1378 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_NON_BOOTABLE
1379 #endif
1380
1381 struct ide_port_info {
1382         char                    *name;
1383         unsigned int            (*init_chipset)(struct pci_dev *);
1384         void                    (*init_iops)(ide_hwif_t *);
1385         void                    (*init_hwif)(ide_hwif_t *);
1386         int                     (*init_dma)(ide_hwif_t *,
1387                                             const struct ide_port_info *);
1388
1389         const struct ide_tp_ops         *tp_ops;
1390         const struct ide_port_ops       *port_ops;
1391         const struct ide_dma_ops        *dma_ops;
1392
1393         ide_pci_enablebit_t     enablebits[2];
1394         hwif_chipset_t          chipset;
1395         u32                     host_flags;
1396         u8                      pio_mask;
1397         u8                      swdma_mask;
1398         u8                      mwdma_mask;
1399         u8                      udma_mask;
1400 };
1401
1402 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1403 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1404                      const struct ide_port_info *, void *);
1405 void ide_pci_remove(struct pci_dev *);
1406
1407 #ifdef CONFIG_PM
1408 int ide_pci_suspend(struct pci_dev *, pm_message_t);
1409 int ide_pci_resume(struct pci_dev *);
1410 #else
1411 #define ide_pci_suspend NULL
1412 #define ide_pci_resume NULL
1413 #endif
1414
1415 void ide_map_sg(ide_drive_t *, struct request *);
1416 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1417
1418 #define BAD_DMA_DRIVE           0
1419 #define GOOD_DMA_DRIVE          1
1420
1421 struct drive_list_entry {
1422         const char *id_model;
1423         const char *id_firmware;
1424 };
1425
1426 int ide_in_drive_list(u16 *, const struct drive_list_entry *);
1427
1428 #ifdef CONFIG_BLK_DEV_IDEDMA
1429 int ide_dma_good_drive(ide_drive_t *);
1430 int __ide_dma_bad_drive(ide_drive_t *);
1431 int ide_id_dma_bug(ide_drive_t *);
1432
1433 u8 ide_find_dma_mode(ide_drive_t *, u8);
1434
1435 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1436 {
1437         return ide_find_dma_mode(drive, XFER_UDMA_6);
1438 }
1439
1440 void ide_dma_off_quietly(ide_drive_t *);
1441 void ide_dma_off(ide_drive_t *);
1442 void ide_dma_on(ide_drive_t *);
1443 int ide_set_dma(ide_drive_t *);
1444 void ide_check_dma_crc(ide_drive_t *);
1445 ide_startstop_t ide_dma_intr(ide_drive_t *);
1446
1447 int ide_allocate_dma_engine(ide_hwif_t *);
1448 void ide_release_dma_engine(ide_hwif_t *);
1449
1450 int ide_build_sglist(ide_drive_t *, struct request *);
1451 void ide_destroy_dmatable(ide_drive_t *);
1452
1453 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1454 int config_drive_for_dma(ide_drive_t *);
1455 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1456 void ide_dma_host_set(ide_drive_t *, int);
1457 extern int ide_dma_setup(ide_drive_t *);
1458 void ide_dma_exec_cmd(ide_drive_t *, u8);
1459 extern void ide_dma_start(ide_drive_t *);
1460 int ide_dma_end(ide_drive_t *);
1461 int ide_dma_test_irq(ide_drive_t *);
1462 extern const struct ide_dma_ops sff_dma_ops;
1463 #else
1464 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
1465 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1466
1467 void ide_dma_lost_irq(ide_drive_t *);
1468 void ide_dma_timeout(ide_drive_t *);
1469
1470 #else
1471 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1472 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1473 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1474 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1475 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1476 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1477 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1478 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1479 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1480 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1481 #endif /* CONFIG_BLK_DEV_IDEDMA */
1482
1483 #ifdef CONFIG_BLK_DEV_IDEACPI
1484 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1485 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1486 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1487 extern void ide_acpi_init(ide_hwif_t *hwif);
1488 void ide_acpi_port_init_devices(ide_hwif_t *);
1489 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1490 #else
1491 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1492 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1493 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1494 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1495 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1496 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1497 #endif
1498
1499 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1500 void ide_unregister(ide_hwif_t *);
1501
1502 void ide_register_region(struct gendisk *);
1503 void ide_unregister_region(struct gendisk *);
1504
1505 void ide_undecoded_slave(ide_drive_t *);
1506
1507 void ide_port_apply_params(ide_hwif_t *);
1508
1509 struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
1510 void ide_host_free(struct ide_host *);
1511 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1512                       hw_regs_t **);
1513 int ide_host_add(const struct ide_port_info *, hw_regs_t **,
1514                  struct ide_host **);
1515 void ide_host_remove(struct ide_host *);
1516 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1517 void ide_port_unregister_devices(ide_hwif_t *);
1518 void ide_port_scan(ide_hwif_t *);
1519
1520 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1521 {
1522         return hwif->hwif_data;
1523 }
1524
1525 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1526 {
1527         hwif->hwif_data = data;
1528 }
1529
1530 const char *ide_xfer_verbose(u8 mode);
1531 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1532 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1533
1534 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1535 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1536
1537 struct ide_timing {
1538         u8  mode;
1539         u8  setup;      /* t1 */
1540         u16 act8b;      /* t2 for 8-bit io */
1541         u16 rec8b;      /* t2i for 8-bit io */
1542         u16 cyc8b;      /* t0 for 8-bit io */
1543         u16 active;     /* t2 or tD */
1544         u16 recover;    /* t2i or tK */
1545         u16 cycle;      /* t0 */
1546         u16 udma;       /* t2CYCTYP/2 */
1547 };
1548
1549 enum {
1550         IDE_TIMING_SETUP        = (1 << 0),
1551         IDE_TIMING_ACT8B        = (1 << 1),
1552         IDE_TIMING_REC8B        = (1 << 2),
1553         IDE_TIMING_CYC8B        = (1 << 3),
1554         IDE_TIMING_8BIT         = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1555                                   IDE_TIMING_CYC8B,
1556         IDE_TIMING_ACTIVE       = (1 << 4),
1557         IDE_TIMING_RECOVER      = (1 << 5),
1558         IDE_TIMING_CYCLE        = (1 << 6),
1559         IDE_TIMING_UDMA         = (1 << 7),
1560         IDE_TIMING_ALL          = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1561                                   IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1562                                   IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1563 };
1564
1565 struct ide_timing *ide_timing_find_mode(u8);
1566 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1567 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1568                       struct ide_timing *, unsigned int);
1569 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1570
1571 int ide_scan_pio_blacklist(char *);
1572
1573 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1574
1575 int ide_set_pio_mode(ide_drive_t *, u8);
1576 int ide_set_dma_mode(ide_drive_t *, u8);
1577
1578 void ide_set_pio(ide_drive_t *, u8);
1579
1580 static inline void ide_set_max_pio(ide_drive_t *drive)
1581 {
1582         ide_set_pio(drive, 255);
1583 }
1584
1585 extern spinlock_t ide_lock;
1586 extern struct mutex ide_cfg_mtx;
1587 /*
1588  * Structure locking:
1589  *
1590  * ide_cfg_mtx and ide_lock together protect changes to
1591  * ide_hwif_t->{next,hwgroup}
1592  * ide_drive_t->next
1593  *
1594  * ide_hwgroup_t->busy: ide_lock
1595  * ide_hwgroup_t->hwif: ide_lock
1596  * ide_hwif_t->mate: constant, no locking
1597  * ide_drive_t->hwif: constant, no locking
1598  */
1599
1600 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1601
1602 extern struct bus_type ide_bus_type;
1603 extern struct class *ide_port_class;
1604
1605 static inline void ide_dump_identify(u8 *id)
1606 {
1607         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1608 }
1609
1610 static inline int hwif_to_node(ide_hwif_t *hwif)
1611 {
1612         return hwif->dev ? dev_to_node(hwif->dev) : -1;
1613 }
1614
1615 static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
1616 {
1617         ide_drive_t *peer = &drive->hwif->drives[(drive->dn ^ 1) & 1];
1618
1619         return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
1620 }
1621 #endif /* _IDE_H */