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 struct ide_drive_s;
 465
 466 struct ide_disk_ops {
 467         int             (*check)(struct ide_drive_s *, const char *);
 468         int             (*get_capacity)(struct ide_drive_s *);
 469         void            (*setup)(struct ide_drive_s *);
 470         void            (*flush)(struct ide_drive_s *);
 471         int             (*init_media)(struct ide_drive_s *, struct gendisk *);
 472         int             (*set_doorlock)(struct ide_drive_s *, struct gendisk *,
 473                                         int);
 474         ide_startstop_t (*do_request)(struct ide_drive_s *, struct request *,
 475                                       sector_t);
 476         int             (*end_request)(struct ide_drive_s *, int, int);
 477         int             (*ioctl)(struct ide_drive_s *, struct block_device *,
 478                                  fmode_t, unsigned int, unsigned long);
 479 };
 480
 481 /* ATAPI device flags */
 482 enum {
 483         IDE_AFLAG_DRQ_INTERRUPT         = (1 << 0),
 484
 485         /* ide-cd */
 486         /* Drive cannot eject the disc. */
 487         IDE_AFLAG_NO_EJECT              = (1 << 3),
 488         /* Drive is a pre ATAPI 1.2 drive. */
 489         IDE_AFLAG_PRE_ATAPI12           = (1 << 4),
 490         /* TOC addresses are in BCD. */
 491         IDE_AFLAG_TOCADDR_AS_BCD        = (1 << 5),
 492         /* TOC track numbers are in BCD. */
 493         IDE_AFLAG_TOCTRACKS_AS_BCD      = (1 << 6),
 494         /*
 495          * Drive does not provide data in multiples of SECTOR_SIZE
 496          * when more than one interrupt is needed.
 497          */
 498         IDE_AFLAG_LIMIT_NFRAMES         = (1 << 7),
 499         /* Seeking in progress. */
 500         IDE_AFLAG_SEEKING               = (1 << 8),
 501         /* Saved TOC information is current. */
 502         IDE_AFLAG_TOC_VALID             = (1 << 9),
 503         /* We think that the drive door is locked. */
 504         IDE_AFLAG_DOOR_LOCKED           = (1 << 10),
 505         /* SET_CD_SPEED command is unsupported. */
 506         IDE_AFLAG_NO_SPEED_SELECT       = (1 << 11),
 507         IDE_AFLAG_VERTOS_300_SSD        = (1 << 12),
 508         IDE_AFLAG_VERTOS_600_ESD        = (1 << 13),
 509         IDE_AFLAG_SANYO_3CD             = (1 << 14),
 510         IDE_AFLAG_FULL_CAPS_PAGE        = (1 << 15),
 511         IDE_AFLAG_PLAY_AUDIO_OK         = (1 << 16),
 512         IDE_AFLAG_LE_SPEED_FIELDS       = (1 << 17),
 513
 514         /* ide-floppy */
 515         /* Avoid commands not supported in Clik drive */
 516         IDE_AFLAG_CLIK_DRIVE            = (1 << 19),
 517         /* Requires BH algorithm for packets */
 518         IDE_AFLAG_ZIP_DRIVE             = (1 << 20),
 519         /* Supports format progress report */
 520         IDE_AFLAG_SRFP                  = (1 << 22),
 521
 522         /* ide-tape */
 523         IDE_AFLAG_IGNORE_DSC            = (1 << 23),
 524         /* 0 When the tape position is unknown */
 525         IDE_AFLAG_ADDRESS_VALID         = (1 << 24),
 526         /* Device already opened */
 527         IDE_AFLAG_BUSY                  = (1 << 25),
 528         /* Attempt to auto-detect the current user block size */
 529         IDE_AFLAG_DETECT_BS             = (1 << 26),
 530         /* Currently on a filemark */
 531         IDE_AFLAG_FILEMARK              = (1 << 27),
 532         /* 0 = no tape is loaded, so we don't rewind after ejecting */
 533         IDE_AFLAG_MEDIUM_PRESENT        = (1 << 28),
 534
 535         IDE_AFLAG_NO_AUTOCLOSE          = (1 << 29),
 536 };
 537
 538 /* device flags */
 539 enum {
 540         /* restore settings after device reset */
 541         IDE_DFLAG_KEEP_SETTINGS         = (1 << 0),
 542         /* device is using DMA for read/write */
 543         IDE_DFLAG_USING_DMA             = (1 << 1),
 544         /* okay to unmask other IRQs */
 545         IDE_DFLAG_UNMASK                = (1 << 2),
 546         /* don't attempt flushes */
 547         IDE_DFLAG_NOFLUSH               = (1 << 3),
 548         /* DSC overlap */
 549         IDE_DFLAG_DSC_OVERLAP           = (1 << 4),
 550         /* give potential excess bandwidth */
 551         IDE_DFLAG_NICE1                 = (1 << 5),
 552         /* device is physically present */
 553         IDE_DFLAG_PRESENT               = (1 << 6),
 554         /* device ejected hint */
 555         IDE_DFLAG_DEAD                  = (1 << 7),
 556         /* id read from device (synthetic if not set) */
 557         IDE_DFLAG_ID_READ               = (1 << 8),
 558         IDE_DFLAG_NOPROBE               = (1 << 9),
 559         /* need to do check_media_change() */
 560         IDE_DFLAG_REMOVABLE             = (1 << 10),
 561         /* needed for removable devices */
 562         IDE_DFLAG_ATTACH                = (1 << 11),
 563         IDE_DFLAG_FORCED_GEOM           = (1 << 12),
 564         /* disallow setting unmask bit */
 565         IDE_DFLAG_NO_UNMASK             = (1 << 13),
 566         /* disallow enabling 32-bit I/O */
 567         IDE_DFLAG_NO_IO_32BIT           = (1 << 14),
 568         /* for removable only: door lock/unlock works */
 569         IDE_DFLAG_DOORLOCKING           = (1 << 15),
 570         /* disallow DMA */
 571         IDE_DFLAG_NODMA                 = (1 << 16),
 572         /* powermanagment told us not to do anything, so sleep nicely */
 573         IDE_DFLAG_BLOCKED               = (1 << 17),
 574         /* ide-scsi emulation */
 575         IDE_DFLAG_SCSI                  = (1 << 18),
 576         /* sleeping & sleep field valid */
 577         IDE_DFLAG_SLEEPING              = (1 << 19),
 578         IDE_DFLAG_POST_RESET            = (1 << 20),
 579         IDE_DFLAG_UDMA33_WARNED         = (1 << 21),
 580         IDE_DFLAG_LBA48                 = (1 << 22),
 581         /* status of write cache */
 582         IDE_DFLAG_WCACHE                = (1 << 23),
 583         /* used for ignoring ATA_DF */
 584         IDE_DFLAG_NOWERR                = (1 << 24),
 585         /* retrying in PIO */
 586         IDE_DFLAG_DMA_PIO_RETRY         = (1 << 25),
 587         IDE_DFLAG_LBA                   = (1 << 26),
 588         /* don't unload heads */
 589         IDE_DFLAG_NO_UNLOAD             = (1 << 27),
 590         /* heads unloaded, please don't reset port */
 591         IDE_DFLAG_PARKED                = (1 << 28),
 592         IDE_DFLAG_MEDIA_CHANGED         = (1 << 29),
 593         /* write protect */
 594         IDE_DFLAG_WP                    = (1 << 30),
 595         IDE_DFLAG_FORMAT_IN_PROGRESS    = (1 << 31),
 596 };
 597
 598 struct ide_drive_s {
 599         char            name[4];        /* drive name, such as "hda" */
 600         char            driver_req[10]; /* requests specific driver */
 601
 602         struct request_queue    *queue; /* request queue */
 603
 604         struct request          *rq;    /* current request */
 605         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 606         void            *driver_data;   /* extra driver data */
 607         u16                     *id;    /* identification info */
 608 #ifdef CONFIG_IDE_PROC_FS
 609         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 610         const struct ide_proc_devset *settings; /* /proc/ide/ drive settings */
 611 #endif
 612         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 613
 614         const struct ide_disk_ops *disk_ops;
 615
 616         unsigned long dev_flags;
 617
 618         unsigned long sleep;            /* sleep until this time */
 619         unsigned long service_start;    /* time we started last request */
 620         unsigned long service_time;     /* service time of last request */
 621         unsigned long timeout;          /* max time to wait for irq */
 622
 623         special_t       special;        /* special action flags */
 624
 625         u8      select;                 /* basic drive/head select reg value */
 626         u8      retry_pio;              /* retrying dma capable host in pio */
 627         u8      waiting_for_dma;        /* dma currently in progress */
 628         u8      dma;                    /* atapi dma flag */
 629
 630         u8      quirk_list;     /* considered quirky, set for a specific host */
 631         u8      init_speed;     /* transfer rate set at boot */
 632         u8      current_speed;  /* current transfer rate set */
 633         u8      desired_speed;  /* desired transfer rate set */
 634         u8      dn;             /* now wide spread use */
 635         u8      acoustic;       /* acoustic management */
 636         u8      media;          /* disk, cdrom, tape, floppy, ... */
 637         u8      ready_stat;     /* min status value for drive ready */
 638         u8      mult_count;     /* current multiple sector setting */
 639         u8      mult_req;       /* requested multiple sector setting */
 640         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 641         u8      bad_wstat;      /* used for ignoring ATA_DF */
 642         u8      head;           /* "real" number of heads */
 643         u8      sect;           /* "real" sectors per track */
 644         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 645         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 646
 647         /* delay this long before sending packet command */
 648         u8 pc_delay;
 649
 650         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 651         unsigned int    cyl;            /* "real" number of cyls */
 652         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 653         unsigned int    failures;       /* current failure count */
 654         unsigned int    max_failures;   /* maximum allowed failure count */
 655         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 656
 657         u64             capacity64;     /* total number of sectors */
 658
 659         int             lun;            /* logical unit */
 660         int             crc_count;      /* crc counter to reduce drive speed */
 661
 662         unsigned long   debug_mask;     /* debugging levels switch */
 663
 664 #ifdef CONFIG_BLK_DEV_IDEACPI
 665         struct ide_acpi_drive_link *acpidata;
 666 #endif
 667         struct list_head list;
 668         struct device   gendev;
 669         struct completion gendev_rel_comp;      /* to deal with device release() */
 670
 671         /* current packet command */
 672         struct ide_atapi_pc *pc;
 673
 674         /* callback for packet commands */
 675         void (*pc_callback)(struct ide_drive_s *, int);
 676
 677         void (*pc_update_buffers)(struct ide_drive_s *, struct ide_atapi_pc *);
 678         int  (*pc_io_buffers)(struct ide_drive_s *, struct ide_atapi_pc *,
 679                               unsigned int, int);
 680
 681         unsigned long atapi_flags;
 682
 683         struct ide_atapi_pc request_sense_pc;
 684         struct request request_sense_rq;
 685 };
 686
 687 typedef struct ide_drive_s ide_drive_t;
 688
 689 #define to_ide_device(dev)              container_of(dev, ide_drive_t, gendev)
 690
 691 #define to_ide_drv(obj, cont_type)      \
 692         container_of(obj, struct cont_type, kref)
 693
 694 #define ide_drv_g(disk, cont_type)      \
 695         container_of((disk)->private_data, struct cont_type, driver)
 696
 697 struct ide_port_info;
 698
 699 struct ide_tp_ops {
 700         void    (*exec_command)(struct hwif_s *, u8);
 701         u8      (*read_status)(struct hwif_s *);
 702         u8      (*read_altstatus)(struct hwif_s *);
 703         u8      (*read_sff_dma_status)(struct hwif_s *);
 704
 705         void    (*set_irq)(struct hwif_s *, int);
 706
 707         void    (*tf_load)(ide_drive_t *, struct ide_task_s *);
 708         void    (*tf_read)(ide_drive_t *, struct ide_task_s *);
 709
 710         void    (*input_data)(ide_drive_t *, struct request *, void *,
 711                               unsigned int);
 712         void    (*output_data)(ide_drive_t *, struct request *, void *,
 713                                unsigned int);
 714 };
 715
 716 extern const struct ide_tp_ops default_tp_ops;
 717
 718 /**
 719  * struct ide_port_ops - IDE port operations
 720  *
 721  * @init_dev:           host specific initialization of a device
 722  * @set_pio_mode:       routine to program host for PIO mode
 723  * @set_dma_mode:       routine to program host for DMA mode
 724  * @selectproc:         tweaks hardware to select drive
 725  * @reset_poll:         chipset polling based on hba specifics
 726  * @pre_reset:          chipset specific changes to default for device-hba resets
 727  * @resetproc:          routine to reset controller after a disk reset
 728  * @maskproc:           special host masking for drive selection
 729  * @quirkproc:          check host's drive quirk list
 730  * @clear_irq:          clear IRQ
 731  *
 732  * @mdma_filter:        filter MDMA modes
 733  * @udma_filter:        filter UDMA modes
 734  *
 735  * @cable_detect:       detect cable type
 736  */
 737 struct ide_port_ops {
 738         void    (*init_dev)(ide_drive_t *);
 739         void    (*set_pio_mode)(ide_drive_t *, const u8);
 740         void    (*set_dma_mode)(ide_drive_t *, const u8);
 741         void    (*selectproc)(ide_drive_t *);
 742         int     (*reset_poll)(ide_drive_t *);
 743         void    (*pre_reset)(ide_drive_t *);
 744         void    (*resetproc)(ide_drive_t *);
 745         void    (*maskproc)(ide_drive_t *, int);
 746         void    (*quirkproc)(ide_drive_t *);
 747         void    (*clear_irq)(ide_drive_t *);
 748
 749         u8      (*mdma_filter)(ide_drive_t *);
 750         u8      (*udma_filter)(ide_drive_t *);
 751
 752         u8      (*cable_detect)(struct hwif_s *);
 753 };
 754
 755 struct ide_dma_ops {
 756         void    (*dma_host_set)(struct ide_drive_s *, int);
 757         int     (*dma_setup)(struct ide_drive_s *);
 758         void    (*dma_exec_cmd)(struct ide_drive_s *, u8);
 759         void    (*dma_start)(struct ide_drive_s *);
 760         int     (*dma_end)(struct ide_drive_s *);
 761         int     (*dma_test_irq)(struct ide_drive_s *);
 762         void    (*dma_lost_irq)(struct ide_drive_s *);
 763         void    (*dma_timeout)(struct ide_drive_s *);
 764 };
 765
 766 struct ide_host;
 767
 768 typedef struct hwif_s {
 769         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 770         struct hwif_s *mate;            /* other hwif from same PCI chip */
 771         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 772         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 773
 774         struct ide_host *host;
 775
 776         char name[6];                   /* name of interface, eg. "ide0" */
 777
 778         struct ide_io_ports     io_ports;
 779
 780         unsigned long   sata_scr[SATA_NR_PORTS];
 781
 782         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 783
 784         u8 major;       /* our major number */
 785         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 786         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 787
 788         u32 host_flags;
 789
 790         u8 pio_mask;
 791
 792         u8 ultra_mask;
 793         u8 mwdma_mask;
 794         u8 swdma_mask;
 795
 796         u8 cbl;         /* cable type */
 797
 798         hwif_chipset_t chipset; /* sub-module for tuning.. */
 799
 800         struct device *dev;
 801
 802         ide_ack_intr_t *ack_intr;
 803
 804         void (*rw_disk)(ide_drive_t *, struct request *);
 805
 806         const struct ide_tp_ops         *tp_ops;
 807         const struct ide_port_ops       *port_ops;
 808         const struct ide_dma_ops        *dma_ops;
 809
 810         /* dma physical region descriptor table (cpu view) */
 811         unsigned int    *dmatable_cpu;
 812         /* dma physical region descriptor table (dma view) */
 813         dma_addr_t      dmatable_dma;
 814
 815         /* maximum number of PRD table entries */
 816         int prd_max_nents;
 817         /* PRD entry size in bytes */
 818         int prd_ent_size;
 819
 820         /* Scatter-gather list used to build the above */
 821         struct scatterlist *sg_table;
 822         int sg_max_nents;               /* Maximum number of entries in it */
 823         int sg_nents;                   /* Current number of entries in it */
 824         int sg_dma_direction;           /* dma transfer direction */
 825
 826         /* data phase of the active command (currently only valid for PIO/DMA) */
 827         int             data_phase;
 828
 829         struct ide_task_s task;         /* current command */
 830
 831         unsigned int nsect;
 832         unsigned int nleft;
 833         struct scatterlist *cursg;
 834         unsigned int cursg_ofs;
 835
 836         int             rqsize;         /* max sectors per request */
 837         int             irq;            /* our irq number */
 838
 839         unsigned long   dma_base;       /* base addr for dma ports */
 840
 841         unsigned long   config_data;    /* for use by chipset-specific code */
 842         unsigned long   select_data;    /* for use by chipset-specific code */
 843
 844         unsigned long   extra_base;     /* extra addr for dma ports */
 845         unsigned        extra_ports;    /* number of extra dma ports */
 846
 847         unsigned        present    : 1; /* this interface exists */
 848         unsigned        serialized : 1; /* serialized all channel operation */
 849         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 850         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 851
 852         struct device           gendev;
 853         struct device           *portdev;
 854
 855         struct completion gendev_rel_comp; /* To deal with device release() */
 856
 857         void            *hwif_data;     /* extra hwif data */
 858
 859 #ifdef CONFIG_BLK_DEV_IDEACPI
 860         struct ide_acpi_hwif_link *acpidata;
 861 #endif
 862 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 863
 864 #define MAX_HOST_PORTS 4
 865
 866 struct ide_host {
 867         ide_hwif_t      *ports[MAX_HOST_PORTS];
 868         unsigned int    n_ports;
 869         struct device   *dev[2];
 870         unsigned int    (*init_chipset)(struct pci_dev *);
 871         unsigned long   host_flags;
 872         void            *host_priv;
 873 };
 874
 875 /*
 876  *  internal ide interrupt handler type
 877  */
 878 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 879 typedef int (ide_expiry_t)(ide_drive_t *);
 880
 881 /* used by ide-cd, ide-floppy, etc. */
 882 typedef void (xfer_func_t)(ide_drive_t *, struct request *rq, void *, unsigned);
 883
 884 typedef struct hwgroup_s {
 885                 /* irq handler, if active */
 886         ide_startstop_t (*handler)(ide_drive_t *);
 887
 888                 /* BOOL: protects all fields below */
 889         volatile int busy;
 890                 /* BOOL: wake us up on timer expiry */
 891         unsigned int sleeping   : 1;
 892                 /* BOOL: polling active & poll_timeout field valid */
 893         unsigned int polling    : 1;
 894
 895                 /* current drive */
 896         ide_drive_t *drive;
 897                 /* ptr to current hwif in linked-list */
 898         ide_hwif_t *hwif;
 899
 900                 /* current request */
 901         struct request *rq;
 902
 903                 /* failsafe timer */
 904         struct timer_list timer;
 905                 /* timeout value during long polls */
 906         unsigned long poll_timeout;
 907                 /* queried upon timeouts */
 908         int (*expiry)(ide_drive_t *);
 909
 910         int req_gen;
 911         int req_gen_timer;
 912 } ide_hwgroup_t;
 913
 914 typedef struct ide_driver_s ide_driver_t;
 915
 916 extern struct mutex ide_setting_mtx;
 917
 918 /*
 919  * configurable drive settings
 920  */
 921
 922 #define DS_SYNC (1 << 0)
 923
 924 struct ide_devset {
 925         int             (*get)(ide_drive_t *);
 926         int             (*set)(ide_drive_t *, int);
 927         unsigned int    flags;
 928 };
 929
 930 #define __DEVSET(_flags, _get, _set) { \
 931         .flags  = _flags, \
 932         .get    = _get, \
 933         .set    = _set, \
 934 }
 935
 936 #define ide_devset_get(name, field) \
 937 static int get_##name(ide_drive_t *drive) \
 938 { \
 939         return drive->field; \
 940 }
 941
 942 #define ide_devset_set(name, field) \
 943 static int set_##name(ide_drive_t *drive, int arg) \
 944 { \
 945         drive->field = arg; \
 946         return 0; \
 947 }
 948
 949 #define ide_devset_get_flag(name, flag) \
 950 static int get_##name(ide_drive_t *drive) \
 951 { \
 952         return !!(drive->dev_flags & flag); \
 953 }
 954
 955 #define ide_devset_set_flag(name, flag) \
 956 static int set_##name(ide_drive_t *drive, int arg) \
 957 { \
 958         if (arg) \
 959                 drive->dev_flags |= flag; \
 960         else \
 961                 drive->dev_flags &= ~flag; \
 962         return 0; \
 963 }
 964
 965 #define __IDE_DEVSET(_name, _flags, _get, _set) \
 966 const struct ide_devset ide_devset_##_name = \
 967         __DEVSET(_flags, _get, _set)
 968
 969 #define IDE_DEVSET(_name, _flags, _get, _set) \
 970 static __IDE_DEVSET(_name, _flags, _get, _set)
 971
 972 #define ide_devset_rw(_name, _func) \
 973 IDE_DEVSET(_name, 0, get_##_func, set_##_func)
 974
 975 #define ide_devset_w(_name, _func) \
 976 IDE_DEVSET(_name, 0, NULL, set_##_func)
 977
 978 #define ide_ext_devset_rw(_name, _func) \
 979 __IDE_DEVSET(_name, 0, get_##_func, set_##_func)
 980
 981 #define ide_ext_devset_rw_sync(_name, _func) \
 982 __IDE_DEVSET(_name, DS_SYNC, get_##_func, set_##_func)
 983
 984 #define ide_decl_devset(_name) \
 985 extern const struct ide_devset ide_devset_##_name
 986
 987 ide_decl_devset(io_32bit);
 988 ide_decl_devset(keepsettings);
 989 ide_decl_devset(pio_mode);
 990 ide_decl_devset(unmaskirq);
 991 ide_decl_devset(using_dma);
 992
 993 #ifdef CONFIG_IDE_PROC_FS
 994 /*
 995  * /proc/ide interface
 996  */
 997
 998 #define ide_devset_rw_field(_name, _field) \
 999 ide_devset_get(_name, _field); \
1000 ide_devset_set(_name, _field); \
1001 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
1002
1003 #define ide_devset_rw_flag(_name, _field) \
1004 ide_devset_get_flag(_name, _field); \
1005 ide_devset_set_flag(_name, _field); \
1006 IDE_DEVSET(_name, DS_SYNC, get_##_name, set_##_name)
1007
1008 struct ide_proc_devset {
1009         const char              *name;
1010         const struct ide_devset *setting;
1011         int                     min, max;
1012         int                     (*mulf)(ide_drive_t *);
1013         int                     (*divf)(ide_drive_t *);
1014 };
1015
1016 #define __IDE_PROC_DEVSET(_name, _min, _max, _mulf, _divf) { \
1017         .name = __stringify(_name), \
1018         .setting = &ide_devset_##_name, \
1019         .min = _min, \
1020         .max = _max, \
1021         .mulf = _mulf, \
1022         .divf = _divf, \
1023 }
1024
1025 #define IDE_PROC_DEVSET(_name, _min, _max) \
1026 __IDE_PROC_DEVSET(_name, _min, _max, NULL, NULL)
1027
1028 typedef struct {
1029         const char      *name;
1030         mode_t          mode;
1031         read_proc_t     *read_proc;
1032         write_proc_t    *write_proc;
1033 } ide_proc_entry_t;
1034
1035 void proc_ide_create(void);
1036 void proc_ide_destroy(void);
1037 void ide_proc_register_port(ide_hwif_t *);
1038 void ide_proc_port_register_devices(ide_hwif_t *);
1039 void ide_proc_unregister_device(ide_drive_t *);
1040 void ide_proc_unregister_port(ide_hwif_t *);
1041 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
1042 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
1043
1044 read_proc_t proc_ide_read_capacity;
1045 read_proc_t proc_ide_read_geometry;
1046
1047 /*
1048  * Standard exit stuff:
1049  */
1050 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
1051 {                                       \
1052         len -= off;                     \
1053         if (len < count) {              \
1054                 *eof = 1;               \
1055                 if (len <= 0)           \
1056                         return 0;       \
1057         } else                          \
1058                 len = count;            \
1059         *start = page + off;            \
1060         return len;                     \
1061 }
1062 #else
1063 static inline void proc_ide_create(void) { ; }
1064 static inline void proc_ide_destroy(void) { ; }
1065 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
1066 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
1067 static inline void ide_proc_unregister_device(ide_drive_t *drive) { ; }
1068 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
1069 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1070 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
1071 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
1072 #endif
1073
1074 enum {
1075         /* enter/exit functions */
1076         IDE_DBG_FUNC =                  (1 << 0),
1077         /* sense key/asc handling */
1078         IDE_DBG_SENSE =                 (1 << 1),
1079         /* packet commands handling */
1080         IDE_DBG_PC =                    (1 << 2),
1081         /* request handling */
1082         IDE_DBG_RQ =                    (1 << 3),
1083         /* driver probing/setup */
1084         IDE_DBG_PROBE =                 (1 << 4),
1085 };
1086
1087 /* DRV_NAME has to be defined in the driver before using the macro below */
1088 #define __ide_debug_log(lvl, fmt, args...)                      \
1089 {                                                               \
1090         if (unlikely(drive->debug_mask & lvl))                  \
1091                 printk(KERN_INFO DRV_NAME ": " fmt, ## args);   \
1092 }
1093
1094 /*
1095  * Power Management state machine (rq->pm->pm_step).
1096  *
1097  * For each step, the core calls ide_start_power_step() first.
1098  * This can return:
1099  *      - ide_stopped : In this case, the core calls us back again unless
1100  *                      step have been set to ide_power_state_completed.
1101  *      - ide_started : In this case, the channel is left busy until an
1102  *                      async event (interrupt) occurs.
1103  * Typically, ide_start_power_step() will issue a taskfile request with
1104  * do_rw_taskfile().
1105  *
1106  * Upon reception of the interrupt, the core will call ide_complete_power_step()
1107  * with the error code if any. This routine should update the step value
1108  * and return. It should not start a new request. The core will call
1109  * ide_start_power_step() for the new step value, unless step have been
1110  * set to IDE_PM_COMPLETED.
1111  */
1112 enum {
1113         IDE_PM_START_SUSPEND,
1114         IDE_PM_FLUSH_CACHE      = IDE_PM_START_SUSPEND,
1115         IDE_PM_STANDBY,
1116
1117         IDE_PM_START_RESUME,
1118         IDE_PM_RESTORE_PIO      = IDE_PM_START_RESUME,
1119         IDE_PM_IDLE,
1120         IDE_PM_RESTORE_DMA,
1121
1122         IDE_PM_COMPLETED,
1123 };
1124
1125 /*
1126  * Subdrivers support.
1127  *
1128  * The gendriver.owner field should be set to the module owner of this driver.
1129  * The gendriver.name field should be set to the name of this driver
1130  */
1131 struct ide_driver_s {
1132         const char                      *version;
1133         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
1134         int             (*end_request)(ide_drive_t *, int, int);
1135         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
1136         struct device_driver    gen_driver;
1137         int             (*probe)(ide_drive_t *);
1138         void            (*remove)(ide_drive_t *);
1139         void            (*resume)(ide_drive_t *);
1140         void            (*shutdown)(ide_drive_t *);
1141 #ifdef CONFIG_IDE_PROC_FS
1142         ide_proc_entry_t *              (*proc_entries)(ide_drive_t *);
1143         const struct ide_proc_devset *  (*proc_devsets)(ide_drive_t *);
1144 #endif
1145 };
1146
1147 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
1148
1149 int ide_device_get(ide_drive_t *);
1150 void ide_device_put(ide_drive_t *);
1151
1152 struct ide_ioctl_devset {
1153         unsigned int    get_ioctl;
1154         unsigned int    set_ioctl;
1155         const struct ide_devset *setting;
1156 };
1157
1158 int ide_setting_ioctl(ide_drive_t *, struct block_device *, unsigned int,
1159                       unsigned long, const struct ide_ioctl_devset *);
1160
1161 int generic_ide_ioctl(ide_drive_t *, struct block_device *, unsigned, unsigned long);
1162
1163 extern int ide_vlb_clk;
1164 extern int ide_pci_clk;
1165
1166 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
1167 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
1168                              int uptodate, int nr_sectors);
1169
1170 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
1171
1172 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
1173                          ide_expiry_t *);
1174
1175 void ide_execute_pkt_cmd(ide_drive_t *);
1176
1177 void ide_pad_transfer(ide_drive_t *, int, int);
1178
1179 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
1180
1181 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
1182
1183 void ide_fix_driveid(u16 *);
1184
1185 extern void ide_fixstring(u8 *, const int, const int);
1186
1187 int ide_busy_sleep(ide_hwif_t *, unsigned long, int);
1188
1189 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
1190
1191 extern ide_startstop_t ide_do_reset (ide_drive_t *);
1192
1193 extern int ide_devset_execute(ide_drive_t *drive,
1194                               const struct ide_devset *setting, int arg);
1195
1196 extern void ide_do_drive_cmd(ide_drive_t *, struct request *);
1197
1198 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
1199
1200 void ide_tf_dump(const char *, struct ide_taskfile *);
1201
1202 void ide_exec_command(ide_hwif_t *, u8);
1203 u8 ide_read_status(ide_hwif_t *);
1204 u8 ide_read_altstatus(ide_hwif_t *);
1205 u8 ide_read_sff_dma_status(ide_hwif_t *);
1206
1207 void ide_set_irq(ide_hwif_t *, int);
1208
1209 void ide_tf_load(ide_drive_t *, ide_task_t *);
1210 void ide_tf_read(ide_drive_t *, ide_task_t *);
1211
1212 void ide_input_data(ide_drive_t *, struct request *, void *, unsigned int);
1213 void ide_output_data(ide_drive_t *, struct request *, void *, unsigned int);
1214
1215 int ide_io_buffers(ide_drive_t *, struct ide_atapi_pc *, unsigned int, int);
1216
1217 extern void SELECT_DRIVE(ide_drive_t *);
1218 void SELECT_MASK(ide_drive_t *, int);
1219
1220 u8 ide_read_error(ide_drive_t *);
1221 void ide_read_bcount_and_ireason(ide_drive_t *, u16 *, u8 *);
1222
1223 extern int drive_is_ready(ide_drive_t *);
1224
1225 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
1226
1227 int ide_check_atapi_device(ide_drive_t *, const char *);
1228
1229 void ide_init_pc(struct ide_atapi_pc *);
1230
1231 /* Disk head parking */
1232 extern wait_queue_head_t ide_park_wq;
1233 ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
1234                       char *buf);
1235 ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
1236                        const char *buf, size_t len);
1237
1238 /*
1239  * Special requests for ide-tape block device strategy routine.
1240  *
1241  * In order to service a character device command, we add special requests to
1242  * the tail of our block device request queue and wait for their completion.
1243  */
1244 enum {
1245         REQ_IDETAPE_PC1         = (1 << 0), /* packet command (first stage) */
1246         REQ_IDETAPE_PC2         = (1 << 1), /* packet command (second stage) */
1247         REQ_IDETAPE_READ        = (1 << 2),
1248         REQ_IDETAPE_WRITE       = (1 << 3),
1249 };
1250
1251 int ide_queue_pc_tail(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *);
1252
1253 int ide_do_test_unit_ready(ide_drive_t *, struct gendisk *);
1254 int ide_do_start_stop(ide_drive_t *, struct gendisk *, int);
1255 int ide_set_media_lock(ide_drive_t *, struct gendisk *, int);
1256 void ide_create_request_sense_cmd(ide_drive_t *, struct ide_atapi_pc *);
1257 void ide_retry_pc(ide_drive_t *, struct gendisk *);
1258
1259 static inline unsigned long ide_scsi_get_timeout(struct ide_atapi_pc *pc)
1260 {
1261         return max_t(unsigned long, WAIT_CMD, pc->timeout - jiffies);
1262 }
1263
1264 int ide_scsi_expiry(ide_drive_t *);
1265
1266 ide_startstop_t ide_issue_pc(ide_drive_t *, unsigned int, ide_expiry_t *);
1267
1268 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
1269
1270 void task_end_request(ide_drive_t *, struct request *, u8);
1271
1272 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
1273 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
1274
1275 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
1276
1277 extern int ide_driveid_update(ide_drive_t *);
1278 extern int ide_config_drive_speed(ide_drive_t *, u8);
1279 extern u8 eighty_ninty_three (ide_drive_t *);
1280 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
1281
1282 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
1283
1284 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
1285
1286 extern void ide_timer_expiry(unsigned long);
1287 extern irqreturn_t ide_intr(int irq, void *dev_id);
1288 extern void do_ide_request(struct request_queue *);
1289
1290 void ide_init_disk(struct gendisk *, ide_drive_t *);
1291
1292 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1293 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1294 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1295 #else
1296 #define ide_pci_register_driver(d) pci_register_driver(d)
1297 #endif
1298
1299 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int,
1300                          hw_regs_t *, hw_regs_t **);
1301 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1302
1303 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1304 int ide_pci_set_master(struct pci_dev *, const char *);
1305 unsigned long ide_pci_dma_base(ide_hwif_t *, const struct ide_port_info *);
1306 int ide_pci_check_simplex(ide_hwif_t *, const struct ide_port_info *);
1307 int ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1308 #else
1309 static inline int ide_hwif_setup_dma(ide_hwif_t *hwif,
1310                                      const struct ide_port_info *d)
1311 {
1312         return -EINVAL;
1313 }
1314 #endif
1315
1316 typedef struct ide_pci_enablebit_s {
1317         u8      reg;    /* byte pci reg holding the enable-bit */
1318         u8      mask;   /* mask to isolate the enable-bit */
1319         u8      val;    /* value of masked reg when "enabled" */
1320 } ide_pci_enablebit_t;
1321
1322 enum {
1323         /* Uses ISA control ports not PCI ones. */
1324         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1325         /* single port device */
1326         IDE_HFLAG_SINGLE                = (1 << 1),
1327         /* don't use legacy PIO blacklist */
1328         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1329         /* set for the second port of QD65xx */
1330         IDE_HFLAG_QD_2ND_PORT           = (1 << 3),
1331         /* use PIO8/9 for prefetch off/on */
1332         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1333         /* use PIO6/7 for fast-devsel off/on */
1334         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1335         /* use 100-102 and 200-202 PIO values to set DMA modes */
1336         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1337         /*
1338          * keep DMA setting when programming PIO mode, may be used only
1339          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1340          */
1341         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1342         /* program host for the transfer mode after programming device */
1343         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1344         /* don't program host/device for the transfer mode ("smart" hosts) */
1345         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1346         /* trust BIOS for programming chipset/device for DMA */
1347         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1348         /* host is CS5510/CS5520 */
1349         IDE_HFLAG_CS5520                = (1 << 11),
1350         /* ATAPI DMA is unsupported */
1351         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1352         /* set if host is a "non-bootable" controller */
1353         IDE_HFLAG_NON_BOOTABLE          = (1 << 13),
1354         /* host doesn't support DMA */
1355         IDE_HFLAG_NO_DMA                = (1 << 14),
1356         /* check if host is PCI IDE device before allowing DMA */
1357         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1358         /* host uses MMIO */
1359         IDE_HFLAG_MMIO                  = (1 << 16),
1360         /* no LBA48 */
1361         IDE_HFLAG_NO_LBA48              = (1 << 17),
1362         /* no LBA48 DMA */
1363         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1364         /* data FIFO is cleared by an error */
1365         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1366         /* serialize ports */
1367         IDE_HFLAG_SERIALIZE             = (1 << 20),
1368         /* use legacy IRQs */
1369         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1370         /* force use of legacy IRQs */
1371         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1372         /* limit LBA48 requests to 256 sectors */
1373         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1374         /* use 32-bit I/O ops */
1375         IDE_HFLAG_IO_32BIT              = (1 << 24),
1376         /* unmask IRQs */
1377         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1378         /* serialize ports if DMA is possible (for sl82c105) */
1379         IDE_HFLAG_SERIALIZE_DMA         = (1 << 27),
1380         /* force host out of "simplex" mode */
1381         IDE_HFLAG_CLEAR_SIMPLEX         = (1 << 28),
1382         /* DSC overlap is unsupported */
1383         IDE_HFLAG_NO_DSC                = (1 << 29),
1384         /* never use 32-bit I/O ops */
1385         IDE_HFLAG_NO_IO_32BIT           = (1 << 30),
1386         /* never unmask IRQs */
1387         IDE_HFLAG_NO_UNMASK_IRQS        = (1 << 31),
1388 };
1389
1390 #ifdef CONFIG_BLK_DEV_OFFBOARD
1391 # define IDE_HFLAG_OFF_BOARD    0
1392 #else
1393 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_NON_BOOTABLE
1394 #endif
1395
1396 struct ide_port_info {
1397         char                    *name;
1398         unsigned int            (*init_chipset)(struct pci_dev *);
1399         void                    (*init_iops)(ide_hwif_t *);
1400         void                    (*init_hwif)(ide_hwif_t *);
1401         int                     (*init_dma)(ide_hwif_t *,
1402                                             const struct ide_port_info *);
1403
1404         const struct ide_tp_ops         *tp_ops;
1405         const struct ide_port_ops       *port_ops;
1406         const struct ide_dma_ops        *dma_ops;
1407
1408         ide_pci_enablebit_t     enablebits[2];
1409         hwif_chipset_t          chipset;
1410         u32                     host_flags;
1411         u8                      pio_mask;
1412         u8                      swdma_mask;
1413         u8                      mwdma_mask;
1414         u8                      udma_mask;
1415 };
1416
1417 int ide_pci_init_one(struct pci_dev *, const struct ide_port_info *, void *);
1418 int ide_pci_init_two(struct pci_dev *, struct pci_dev *,
1419                      const struct ide_port_info *, void *);
1420 void ide_pci_remove(struct pci_dev *);
1421
1422 #ifdef CONFIG_PM
1423 int ide_pci_suspend(struct pci_dev *, pm_message_t);
1424 int ide_pci_resume(struct pci_dev *);
1425 #else
1426 #define ide_pci_suspend NULL
1427 #define ide_pci_resume NULL
1428 #endif
1429
1430 void ide_map_sg(ide_drive_t *, struct request *);
1431 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1432
1433 #define BAD_DMA_DRIVE           0
1434 #define GOOD_DMA_DRIVE          1
1435
1436 struct drive_list_entry {
1437         const char *id_model;
1438         const char *id_firmware;
1439 };
1440
1441 int ide_in_drive_list(u16 *, const struct drive_list_entry *);
1442
1443 #ifdef CONFIG_BLK_DEV_IDEDMA
1444 int ide_dma_good_drive(ide_drive_t *);
1445 int __ide_dma_bad_drive(ide_drive_t *);
1446 int ide_id_dma_bug(ide_drive_t *);
1447
1448 u8 ide_find_dma_mode(ide_drive_t *, u8);
1449
1450 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1451 {
1452         return ide_find_dma_mode(drive, XFER_UDMA_6);
1453 }
1454
1455 void ide_dma_off_quietly(ide_drive_t *);
1456 void ide_dma_off(ide_drive_t *);
1457 void ide_dma_on(ide_drive_t *);
1458 int ide_set_dma(ide_drive_t *);
1459 void ide_check_dma_crc(ide_drive_t *);
1460 ide_startstop_t ide_dma_intr(ide_drive_t *);
1461
1462 int ide_allocate_dma_engine(ide_hwif_t *);
1463 void ide_release_dma_engine(ide_hwif_t *);
1464
1465 int ide_build_sglist(ide_drive_t *, struct request *);
1466 void ide_destroy_dmatable(ide_drive_t *);
1467
1468 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1469 int config_drive_for_dma(ide_drive_t *);
1470 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1471 void ide_dma_host_set(ide_drive_t *, int);
1472 extern int ide_dma_setup(ide_drive_t *);
1473 void ide_dma_exec_cmd(ide_drive_t *, u8);
1474 extern void ide_dma_start(ide_drive_t *);
1475 int ide_dma_end(ide_drive_t *);
1476 int ide_dma_test_irq(ide_drive_t *);
1477 extern const struct ide_dma_ops sff_dma_ops;
1478 #else
1479 static inline int config_drive_for_dma(ide_drive_t *drive) { return 0; }
1480 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1481
1482 void ide_dma_lost_irq(ide_drive_t *);
1483 void ide_dma_timeout(ide_drive_t *);
1484
1485 #else
1486 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1487 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1488 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1489 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1490 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1491 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1492 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1493 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1494 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1495 static inline void ide_release_dma_engine(ide_hwif_t *hwif) { ; }
1496 #endif /* CONFIG_BLK_DEV_IDEDMA */
1497
1498 #ifdef CONFIG_BLK_DEV_IDEACPI
1499 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1500 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1501 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1502 extern void ide_acpi_init(ide_hwif_t *hwif);
1503 void ide_acpi_port_init_devices(ide_hwif_t *);
1504 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1505 #else
1506 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1507 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1508 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1509 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1510 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1511 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1512 #endif
1513
1514 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1515 void ide_unregister(ide_hwif_t *);
1516
1517 void ide_register_region(struct gendisk *);
1518 void ide_unregister_region(struct gendisk *);
1519
1520 void ide_undecoded_slave(ide_drive_t *);
1521
1522 void ide_port_apply_params(ide_hwif_t *);
1523
1524 struct ide_host *ide_host_alloc(const struct ide_port_info *, hw_regs_t **);
1525 void ide_host_free(struct ide_host *);
1526 int ide_host_register(struct ide_host *, const struct ide_port_info *,
1527                       hw_regs_t **);
1528 int ide_host_add(const struct ide_port_info *, hw_regs_t **,
1529                  struct ide_host **);
1530 void ide_host_remove(struct ide_host *);
1531 int ide_legacy_device_add(const struct ide_port_info *, unsigned long);
1532 void ide_port_unregister_devices(ide_hwif_t *);
1533 void ide_port_scan(ide_hwif_t *);
1534
1535 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1536 {
1537         return hwif->hwif_data;
1538 }
1539
1540 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1541 {
1542         hwif->hwif_data = data;
1543 }
1544
1545 const char *ide_xfer_verbose(u8 mode);
1546 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1547 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1548
1549 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1550 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1551
1552 struct ide_timing {
1553         u8  mode;
1554         u8  setup;      /* t1 */
1555         u16 act8b;      /* t2 for 8-bit io */
1556         u16 rec8b;      /* t2i for 8-bit io */
1557         u16 cyc8b;      /* t0 for 8-bit io */
1558         u16 active;     /* t2 or tD */
1559         u16 recover;    /* t2i or tK */
1560         u16 cycle;      /* t0 */
1561         u16 udma;       /* t2CYCTYP/2 */
1562 };
1563
1564 enum {
1565         IDE_TIMING_SETUP        = (1 << 0),
1566         IDE_TIMING_ACT8B        = (1 << 1),
1567         IDE_TIMING_REC8B        = (1 << 2),
1568         IDE_TIMING_CYC8B        = (1 << 3),
1569         IDE_TIMING_8BIT         = IDE_TIMING_ACT8B | IDE_TIMING_REC8B |
1570                                   IDE_TIMING_CYC8B,
1571         IDE_TIMING_ACTIVE       = (1 << 4),
1572         IDE_TIMING_RECOVER      = (1 << 5),
1573         IDE_TIMING_CYCLE        = (1 << 6),
1574         IDE_TIMING_UDMA         = (1 << 7),
1575         IDE_TIMING_ALL          = IDE_TIMING_SETUP | IDE_TIMING_8BIT |
1576                                   IDE_TIMING_ACTIVE | IDE_TIMING_RECOVER |
1577                                   IDE_TIMING_CYCLE | IDE_TIMING_UDMA,
1578 };
1579
1580 struct ide_timing *ide_timing_find_mode(u8);
1581 u16 ide_pio_cycle_time(ide_drive_t *, u8);
1582 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
1583                       struct ide_timing *, unsigned int);
1584 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
1585
1586 int ide_scan_pio_blacklist(char *);
1587
1588 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1589
1590 int ide_set_pio_mode(ide_drive_t *, u8);
1591 int ide_set_dma_mode(ide_drive_t *, u8);
1592
1593 void ide_set_pio(ide_drive_t *, u8);
1594
1595 static inline void ide_set_max_pio(ide_drive_t *drive)
1596 {
1597         ide_set_pio(drive, 255);
1598 }
1599
1600 extern spinlock_t ide_lock;
1601 extern struct mutex ide_cfg_mtx;
1602 /*
1603  * Structure locking:
1604  *
1605  * ide_cfg_mtx and ide_lock together protect changes to
1606  * ide_hwif_t->{next,hwgroup}
1607  * ide_drive_t->next
1608  *
1609  * ide_hwgroup_t->busy: ide_lock
1610  * ide_hwgroup_t->hwif: ide_lock
1611  * ide_hwif_t->mate: constant, no locking
1612  * ide_drive_t->hwif: constant, no locking
1613  */
1614
1615 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1616
1617 extern struct bus_type ide_bus_type;
1618 extern struct class *ide_port_class;
1619
1620 static inline void ide_dump_identify(u8 *id)
1621 {
1622         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1623 }
1624
1625 static inline int hwif_to_node(ide_hwif_t *hwif)
1626 {
1627         return hwif->dev ? dev_to_node(hwif->dev) : -1;
1628 }
1629
1630 static inline ide_drive_t *ide_get_pair_dev(ide_drive_t *drive)
1631 {
1632         ide_drive_t *peer = &drive->hwif->drives[(drive->dn ^ 1) & 1];
1633
1634         return (peer->dev_flags & IDE_DFLAG_PRESENT) ? peer : NULL;
1635 }
1636 #endif /* _IDE_H */