include/linux/ide.h

   1 #ifndef _IDE_H
   2 #define _IDE_H
   3 /*
   4  *  linux/include/linux/ide.h
   5  *
   6  *  Copyright (C) 1994-2002  Linus Torvalds & authors
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/ioport.h>
  11 #include <linux/hdreg.h>
  12 #include <linux/hdsmart.h>
  13 #include <linux/blkdev.h>
  14 #include <linux/proc_fs.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/bitops.h>
  17 #include <linux/bio.h>
  18 #include <linux/device.h>
  19 #include <linux/pci.h>
  20 #include <linux/completion.h>
  21 #ifdef CONFIG_BLK_DEV_IDEACPI
  22 #include <acpi/acpi.h>
  23 #endif
  24 #include <asm/byteorder.h>
  25 #include <asm/system.h>
  26 #include <asm/io.h>
  27 #include <asm/semaphore.h>
  28 #include <asm/mutex.h>
  29
  30 #if defined(CRIS) || defined(FRV)
  31 # define SUPPORT_VLB_SYNC 0
  32 #else
  33 # define SUPPORT_VLB_SYNC 1
  34 #endif
  35
  36 /*
  37  * Used to indicate "no IRQ", should be a value that cannot be an IRQ
  38  * number.
  39  */
  40
  41 #define IDE_NO_IRQ              (-1)
  42
  43 typedef unsigned char   byte;   /* used everywhere */
  44
  45 /*
  46  * Probably not wise to fiddle with these
  47  */
  48 #define ERROR_MAX       8       /* Max read/write errors per sector */
  49 #define ERROR_RESET     3       /* Reset controller every 4th retry */
  50 #define ERROR_RECAL     1       /* Recalibrate every 2nd retry */
  51
  52 /*
  53  * Tune flags
  54  */
  55 #define IDE_TUNE_NOAUTO         2
  56 #define IDE_TUNE_AUTO           1
  57 #define IDE_TUNE_DEFAULT        0
  58
  59 /*
  60  * state flags
  61  */
  62
  63 #define DMA_PIO_RETRY   1       /* retrying in PIO */
  64
  65 #define HWIF(drive)             ((ide_hwif_t *)((drive)->hwif))
  66 #define HWGROUP(drive)          ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  67
  68 /*
  69  * Definitions for accessing IDE controller registers
  70  */
  71 #define IDE_NR_PORTS            (10)
  72
  73 #define IDE_DATA_OFFSET         (0)
  74 #define IDE_ERROR_OFFSET        (1)
  75 #define IDE_NSECTOR_OFFSET      (2)
  76 #define IDE_SECTOR_OFFSET       (3)
  77 #define IDE_LCYL_OFFSET         (4)
  78 #define IDE_HCYL_OFFSET         (5)
  79 #define IDE_SELECT_OFFSET       (6)
  80 #define IDE_STATUS_OFFSET       (7)
  81 #define IDE_CONTROL_OFFSET      (8)
  82 #define IDE_IRQ_OFFSET          (9)
  83
  84 #define IDE_FEATURE_OFFSET      IDE_ERROR_OFFSET
  85 #define IDE_COMMAND_OFFSET      IDE_STATUS_OFFSET
  86
  87 #define IDE_DATA_REG            (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
  88 #define IDE_ERROR_REG           (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
  89 #define IDE_NSECTOR_REG         (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
  90 #define IDE_SECTOR_REG          (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
  91 #define IDE_LCYL_REG            (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
  92 #define IDE_HCYL_REG            (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
  93 #define IDE_SELECT_REG          (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
  94 #define IDE_STATUS_REG          (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
  95 #define IDE_CONTROL_REG         (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
  96 #define IDE_IRQ_REG             (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
  97
  98 #define IDE_FEATURE_REG         IDE_ERROR_REG
  99 #define IDE_COMMAND_REG         IDE_STATUS_REG
 100 #define IDE_ALTSTATUS_REG       IDE_CONTROL_REG
 101 #define IDE_IREASON_REG         IDE_NSECTOR_REG
 102 #define IDE_BCOUNTL_REG         IDE_LCYL_REG
 103 #define IDE_BCOUNTH_REG         IDE_HCYL_REG
 104
 105 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
 106 #define BAD_R_STAT              (BUSY_STAT   | ERR_STAT)
 107 #define BAD_W_STAT              (BAD_R_STAT  | WRERR_STAT)
 108 #define BAD_STAT                (BAD_R_STAT  | DRQ_STAT)
 109 #define DRIVE_READY             (READY_STAT  | SEEK_STAT)
 110 #define DATA_READY              (DRQ_STAT)
 111
 112 #define BAD_CRC                 (ABRT_ERR    | ICRC_ERR)
 113
 114 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
 115
 116 #define SATA_STATUS_OFFSET      (0)
 117 #define SATA_STATUS_REG         (HWIF(drive)->sata_scr[SATA_STATUS_OFFSET])
 118 #define SATA_ERROR_OFFSET       (1)
 119 #define SATA_ERROR_REG          (HWIF(drive)->sata_scr[SATA_ERROR_OFFSET])
 120 #define SATA_CONTROL_OFFSET     (2)
 121 #define SATA_CONTROL_REG        (HWIF(drive)->sata_scr[SATA_CONTROL_OFFSET])
 122
 123 #define SATA_MISC_OFFSET        (0)
 124 #define SATA_MISC_REG           (HWIF(drive)->sata_misc[SATA_MISC_OFFSET])
 125 #define SATA_PHY_OFFSET         (1)
 126 #define SATA_PHY_REG            (HWIF(drive)->sata_misc[SATA_PHY_OFFSET])
 127 #define SATA_IEN_OFFSET         (2)
 128 #define SATA_IEN_REG            (HWIF(drive)->sata_misc[SATA_IEN_OFFSET])
 129
 130 /*
 131  * Our Physical Region Descriptor (PRD) table should be large enough
 132  * to handle the biggest I/O request we are likely to see.  Since requests
 133  * can have no more than 256 sectors, and since the typical blocksize is
 134  * two or more sectors, we could get by with a limit of 128 entries here for
 135  * the usual worst case.  Most requests seem to include some contiguous blocks,
 136  * further reducing the number of table entries required.
 137  *
 138  * The driver reverts to PIO mode for individual requests that exceed
 139  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 140  * 100% of all crazy scenarios here is not necessary.
 141  *
 142  * As it turns out though, we must allocate a full 4KB page for this,
 143  * so the two PRD tables (ide0 & ide1) will each get half of that,
 144  * allowing each to have about 256 entries (8 bytes each) from this.
 145  */
 146 #define PRD_BYTES       8
 147 #define PRD_ENTRIES     256
 148
 149 /*
 150  * Some more useful definitions
 151  */
 152 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
 153 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
 154 #define SECTOR_SIZE     512
 155 #define SECTOR_WORDS    (SECTOR_SIZE / 4)       /* number of 32bit words per sector */
 156 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
 157
 158 /*
 159  * Timeouts for various operations:
 160  */
 161 #define WAIT_DRQ        (HZ/10)         /* 100msec - spec allows up to 20ms */
 162 #define WAIT_READY      (5*HZ)          /* 5sec - some laptops are very slow */
 163 #define WAIT_PIDENTIFY  (10*HZ) /* 10sec  - should be less than 3ms (?), if all ATAPI CD is closed at boot */
 164 #define WAIT_WORSTCASE  (30*HZ) /* 30sec  - worst case when spinning up */
 165 #define WAIT_CMD        (10*HZ) /* 10sec  - maximum wait for an IRQ to happen */
 166 #define WAIT_MIN_SLEEP  (2*HZ/100)      /* 20msec - minimum sleep time */
 167
 168 /*
 169  * Check for an interrupt and acknowledge the interrupt status
 170  */
 171 struct hwif_s;
 172 typedef int (ide_ack_intr_t)(struct hwif_s *);
 173
 174 /*
 175  * hwif_chipset_t is used to keep track of the specific hardware
 176  * chipset used by each IDE interface, if known.
 177  */
 178 enum {          ide_unknown,    ide_generic,    ide_pci,
 179                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
 180                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
 181                 ide_rz1000,     ide_trm290,
 182                 ide_cmd646,     ide_cy82c693,   ide_4drives,
 183                 ide_pmac,       ide_etrax100,   ide_acorn,
 184                 ide_au1xxx, ide_forced
 185 };
 186
 187 typedef u8 hwif_chipset_t;
 188
 189 /*
 190  * Structure to hold all information about the location of this port
 191  */
 192 typedef struct hw_regs_s {
 193         unsigned long   io_ports[IDE_NR_PORTS]; /* task file registers */
 194         int             irq;                    /* our irq number */
 195         ide_ack_intr_t  *ack_intr;              /* acknowledge interrupt */
 196         hwif_chipset_t  chipset;
 197         struct device   *dev;
 198 } hw_regs_t;
 199
 200 struct hwif_s * ide_find_port(unsigned long);
 201
 202 int ide_register_hw(hw_regs_t *, void (*)(struct hwif_s *), int,
 203                     struct hwif_s **);
 204
 205 void ide_setup_ports(   hw_regs_t *hw,
 206                         unsigned long base,
 207                         int *offsets,
 208                         unsigned long ctrl,
 209                         unsigned long intr,
 210                         ide_ack_intr_t *ack_intr,
 211 #if 0
 212                         ide_io_ops_t *iops,
 213 #endif
 214                         int irq);
 215
 216 static inline void ide_std_init_ports(hw_regs_t *hw,
 217                                       unsigned long io_addr,
 218                                       unsigned long ctl_addr)
 219 {
 220         unsigned int i;
 221
 222         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 223                 hw->io_ports[i] = io_addr++;
 224
 225         hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
 226 }
 227
 228 #include <asm/ide.h>
 229
 230 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
 231 #undef MAX_HWIFS
 232 #define MAX_HWIFS       CONFIG_IDE_MAX_HWIFS
 233 #endif
 234
 235 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
 236 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
 237 # define ide_default_io_base(index)     (0)
 238 # define ide_default_irq(base)          (0)
 239 # define ide_init_default_irq(base)     (0)
 240 #endif
 241
 242 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
 243 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 244                                        unsigned long io_addr,
 245                                        unsigned long ctl_addr,
 246                                        int *irq)
 247 {
 248         if (!ctl_addr)
 249                 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
 250         else
 251                 ide_std_init_ports(hw, io_addr, ctl_addr);
 252
 253         if (irq)
 254                 *irq = 0;
 255
 256         hw->io_ports[IDE_IRQ_OFFSET] = 0;
 257
 258 #ifdef CONFIG_PPC32
 259         if (ppc_ide_md.ide_init_hwif)
 260                 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
 261 #endif
 262 }
 263 #else
 264 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 265                                        unsigned long io_addr,
 266                                        unsigned long ctl_addr,
 267                                        int *irq)
 268 {
 269         if (io_addr || ctl_addr)
 270                 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
 271 }
 272 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
 273
 274 /* Currently only m68k, apus and m8xx need it */
 275 #ifndef IDE_ARCH_ACK_INTR
 276 # define ide_ack_intr(hwif) (1)
 277 #endif
 278
 279 /* Currently only Atari needs it */
 280 #ifndef IDE_ARCH_LOCK
 281 # define ide_release_lock()                     do {} while (0)
 282 # define ide_get_lock(hdlr, data)               do {} while (0)
 283 #endif /* IDE_ARCH_LOCK */
 284
 285 /*
 286  * Now for the data we need to maintain per-drive:  ide_drive_t
 287  */
 288
 289 #define ide_scsi        0x21
 290 #define ide_disk        0x20
 291 #define ide_optical     0x7
 292 #define ide_cdrom       0x5
 293 #define ide_tape        0x1
 294 #define ide_floppy      0x0
 295
 296 /*
 297  * Special Driver Flags
 298  *
 299  * set_geometry : respecify drive geometry
 300  * recalibrate  : seek to cyl 0
 301  * set_multmode : set multmode count
 302  * set_tune     : tune interface for drive
 303  * serviced     : service command
 304  * reserved     : unused
 305  */
 306 typedef union {
 307         unsigned all                    : 8;
 308         struct {
 309                 unsigned set_geometry   : 1;
 310                 unsigned recalibrate    : 1;
 311                 unsigned set_multmode   : 1;
 312                 unsigned set_tune       : 1;
 313                 unsigned serviced       : 1;
 314                 unsigned reserved       : 3;
 315         } b;
 316 } special_t;
 317
 318 /*
 319  * ATA-IDE Select Register, aka Device-Head
 320  *
 321  * head         : always zeros here
 322  * unit         : drive select number: 0/1
 323  * bit5         : always 1
 324  * lba          : using LBA instead of CHS
 325  * bit7         : always 1
 326  */
 327 typedef union {
 328         unsigned all                    : 8;
 329         struct {
 330 #if defined(__LITTLE_ENDIAN_BITFIELD)
 331                 unsigned head           : 4;
 332                 unsigned unit           : 1;
 333                 unsigned bit5           : 1;
 334                 unsigned lba            : 1;
 335                 unsigned bit7           : 1;
 336 #elif defined(__BIG_ENDIAN_BITFIELD)
 337                 unsigned bit7           : 1;
 338                 unsigned lba            : 1;
 339                 unsigned bit5           : 1;
 340                 unsigned unit           : 1;
 341                 unsigned head           : 4;
 342 #else
 343 #error "Please fix <asm/byteorder.h>"
 344 #endif
 345         } b;
 346 } select_t, ata_select_t;
 347
 348 /*
 349  * Status returned from various ide_ functions
 350  */
 351 typedef enum {
 352         ide_stopped,    /* no drive operation was started */
 353         ide_started,    /* a drive operation was started, handler was set */
 354 } ide_startstop_t;
 355
 356 struct ide_driver_s;
 357 struct ide_settings_s;
 358
 359 #ifdef CONFIG_BLK_DEV_IDEACPI
 360 struct ide_acpi_drive_link;
 361 struct ide_acpi_hwif_link;
 362 #endif
 363
 364 typedef struct ide_drive_s {
 365         char            name[4];        /* drive name, such as "hda" */
 366         char            driver_req[10]; /* requests specific driver */
 367
 368         struct request_queue    *queue; /* request queue */
 369
 370         struct request          *rq;    /* current request */
 371         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 372         void            *driver_data;   /* extra driver data */
 373         struct hd_driveid       *id;    /* drive model identification info */
 374 #ifdef CONFIG_IDE_PROC_FS
 375         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 376         struct ide_settings_s *settings;/* /proc/ide/ drive settings */
 377 #endif
 378         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 379
 380         unsigned long sleep;            /* sleep until this time */
 381         unsigned long service_start;    /* time we started last request */
 382         unsigned long service_time;     /* service time of last request */
 383         unsigned long timeout;          /* max time to wait for irq */
 384
 385         special_t       special;        /* special action flags */
 386         select_t        select;         /* basic drive/head select reg value */
 387
 388         u8      keep_settings;          /* restore settings after drive reset */
 389         u8      using_dma;              /* disk is using dma for read/write */
 390         u8      retry_pio;              /* retrying dma capable host in pio */
 391         u8      state;                  /* retry state */
 392         u8      waiting_for_dma;        /* dma currently in progress */
 393         u8      unmask;                 /* okay to unmask other irqs */
 394         u8      bswap;                  /* byte swap data */
 395         u8      noflush;                /* don't attempt flushes */
 396         u8      dsc_overlap;            /* DSC overlap */
 397         u8      nice1;                  /* give potential excess bandwidth */
 398
 399         unsigned present        : 1;    /* drive is physically present */
 400         unsigned dead           : 1;    /* device ejected hint */
 401         unsigned id_read        : 1;    /* 1=id read from disk 0 = synthetic */
 402         unsigned noprobe        : 1;    /* from:  hdx=noprobe */
 403         unsigned removable      : 1;    /* 1 if need to do check_media_change */
 404         unsigned attach         : 1;    /* needed for removable devices */
 405         unsigned forced_geom    : 1;    /* 1 if hdx=c,h,s was given at boot */
 406         unsigned no_unmask      : 1;    /* disallow setting unmask bit */
 407         unsigned no_io_32bit    : 1;    /* disallow enabling 32bit I/O */
 408         unsigned atapi_overlap  : 1;    /* ATAPI overlap (not supported) */
 409         unsigned nice0          : 1;    /* give obvious excess bandwidth */
 410         unsigned nice2          : 1;    /* give a share in our own bandwidth */
 411         unsigned doorlocking    : 1;    /* for removable only: door lock/unlock works */
 412         unsigned nodma          : 1;    /* disallow DMA */
 413         unsigned autotune       : 2;    /* 0=default, 1=autotune, 2=noautotune */
 414         unsigned remap_0_to_1   : 1;    /* 0=noremap, 1=remap 0->1 (for EZDrive) */
 415         unsigned blocked        : 1;    /* 1=powermanagment told us not to do anything, so sleep nicely */
 416         unsigned vdma           : 1;    /* 1=doing PIO over DMA 0=doing normal DMA */
 417         unsigned scsi           : 1;    /* 0=default, 1=ide-scsi emulation */
 418         unsigned sleeping       : 1;    /* 1=sleeping & sleep field valid */
 419         unsigned post_reset     : 1;
 420         unsigned udma33_warned  : 1;
 421
 422         u8      addressing;     /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
 423         u8      quirk_list;     /* considered quirky, set for a specific host */
 424         u8      init_speed;     /* transfer rate set at boot */
 425         u8      current_speed;  /* current transfer rate set */
 426         u8      desired_speed;  /* desired transfer rate set */
 427         u8      dn;             /* now wide spread use */
 428         u8      wcache;         /* status of write cache */
 429         u8      acoustic;       /* acoustic management */
 430         u8      media;          /* disk, cdrom, tape, floppy, ... */
 431         u8      ctl;            /* "normal" value for IDE_CONTROL_REG */
 432         u8      ready_stat;     /* min status value for drive ready */
 433         u8      mult_count;     /* current multiple sector setting */
 434         u8      mult_req;       /* requested multiple sector setting */
 435         u8      tune_req;       /* requested drive tuning setting */
 436         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 437         u8      bad_wstat;      /* used for ignoring WRERR_STAT */
 438         u8      nowerr;         /* used for ignoring WRERR_STAT */
 439         u8      sect0;          /* offset of first sector for DM6:DDO */
 440         u8      head;           /* "real" number of heads */
 441         u8      sect;           /* "real" sectors per track */
 442         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 443         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 444
 445         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 446         unsigned int    cyl;            /* "real" number of cyls */
 447         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 448         unsigned int    failures;       /* current failure count */
 449         unsigned int    max_failures;   /* maximum allowed failure count */
 450         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 451
 452         u64             capacity64;     /* total number of sectors */
 453
 454         int             lun;            /* logical unit */
 455         int             crc_count;      /* crc counter to reduce drive speed */
 456 #ifdef CONFIG_BLK_DEV_IDEACPI
 457         struct ide_acpi_drive_link *acpidata;
 458 #endif
 459         struct list_head list;
 460         struct device   gendev;
 461         struct completion gendev_rel_comp;      /* to deal with device release() */
 462 } ide_drive_t;
 463
 464 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
 465
 466 #define IDE_CHIPSET_PCI_MASK    \
 467     ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
 468 #define IDE_CHIPSET_IS_PCI(c)   ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
 469
 470 struct ide_port_info;
 471
 472 typedef struct hwif_s {
 473         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 474         struct hwif_s *mate;            /* other hwif from same PCI chip */
 475         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 476         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 477
 478         char name[6];                   /* name of interface, eg. "ide0" */
 479
 480                 /* task file registers for pata and sata */
 481         unsigned long   io_ports[IDE_NR_PORTS];
 482         unsigned long   sata_scr[SATA_NR_PORTS];
 483         unsigned long   sata_misc[SATA_NR_PORTS];
 484
 485         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 486
 487         u8 major;       /* our major number */
 488         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 489         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 490         u8 straight8;   /* Alan's straight 8 check */
 491         u8 bus_state;   /* power state of the IDE bus */
 492
 493         u32 host_flags;
 494
 495         u8 pio_mask;
 496
 497         u8 ultra_mask;
 498         u8 mwdma_mask;
 499         u8 swdma_mask;
 500
 501         u8 cbl;         /* cable type */
 502
 503         hwif_chipset_t chipset; /* sub-module for tuning.. */
 504
 505         struct pci_dev  *pci_dev;       /* for pci chipsets */
 506         const struct ide_port_info *cds;        /* chipset device struct */
 507
 508         ide_ack_intr_t *ack_intr;
 509
 510         void (*rw_disk)(ide_drive_t *, struct request *);
 511
 512 #if 0
 513         ide_hwif_ops_t  *hwifops;
 514 #else
 515         /* routine to program host for PIO mode */
 516         void    (*set_pio_mode)(ide_drive_t *, const u8);
 517         /* routine to program host for DMA mode */
 518         void    (*set_dma_mode)(ide_drive_t *, const u8);
 519         /* tweaks hardware to select drive */
 520         void    (*selectproc)(ide_drive_t *);
 521         /* chipset polling based on hba specifics */
 522         int     (*reset_poll)(ide_drive_t *);
 523         /* chipset specific changes to default for device-hba resets */
 524         void    (*pre_reset)(ide_drive_t *);
 525         /* routine to reset controller after a disk reset */
 526         void    (*resetproc)(ide_drive_t *);
 527         /* special host masking for drive selection */
 528         void    (*maskproc)(ide_drive_t *, int);
 529         /* check host's drive quirk list */
 530         int     (*quirkproc)(ide_drive_t *);
 531         /* driver soft-power interface */
 532         int     (*busproc)(ide_drive_t *, int);
 533 #endif
 534         u8 (*mdma_filter)(ide_drive_t *);
 535         u8 (*udma_filter)(ide_drive_t *);
 536
 537         void (*fixup)(struct hwif_s *);
 538
 539         void (*ata_input_data)(ide_drive_t *, void *, u32);
 540         void (*ata_output_data)(ide_drive_t *, void *, u32);
 541
 542         void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
 543         void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
 544
 545         int (*dma_setup)(ide_drive_t *);
 546         void (*dma_exec_cmd)(ide_drive_t *, u8);
 547         void (*dma_start)(ide_drive_t *);
 548         int (*ide_dma_end)(ide_drive_t *drive);
 549         int (*ide_dma_on)(ide_drive_t *drive);
 550         void (*dma_off_quietly)(ide_drive_t *drive);
 551         int (*ide_dma_test_irq)(ide_drive_t *drive);
 552         void (*ide_dma_clear_irq)(ide_drive_t *drive);
 553         void (*dma_host_on)(ide_drive_t *drive);
 554         void (*dma_host_off)(ide_drive_t *drive);
 555         void (*dma_lost_irq)(ide_drive_t *drive);
 556         void (*dma_timeout)(ide_drive_t *drive);
 557
 558         void (*OUTB)(u8 addr, unsigned long port);
 559         void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
 560         void (*OUTW)(u16 addr, unsigned long port);
 561         void (*OUTSW)(unsigned long port, void *addr, u32 count);
 562         void (*OUTSL)(unsigned long port, void *addr, u32 count);
 563
 564         u8  (*INB)(unsigned long port);
 565         u16 (*INW)(unsigned long port);
 566         void (*INSW)(unsigned long port, void *addr, u32 count);
 567         void (*INSL)(unsigned long port, void *addr, u32 count);
 568
 569         /* dma physical region descriptor table (cpu view) */
 570         unsigned int    *dmatable_cpu;
 571         /* dma physical region descriptor table (dma view) */
 572         dma_addr_t      dmatable_dma;
 573         /* Scatter-gather list used to build the above */
 574         struct scatterlist *sg_table;
 575         int sg_max_nents;               /* Maximum number of entries in it */
 576         int sg_nents;                   /* Current number of entries in it */
 577         int sg_dma_direction;           /* dma transfer direction */
 578
 579         /* data phase of the active command (currently only valid for PIO/DMA) */
 580         int             data_phase;
 581
 582         unsigned int nsect;
 583         unsigned int nleft;
 584         struct scatterlist *cursg;
 585         unsigned int cursg_ofs;
 586
 587         int             rqsize;         /* max sectors per request */
 588         int             irq;            /* our irq number */
 589
 590         unsigned long   dma_base;       /* base addr for dma ports */
 591         unsigned long   dma_command;    /* dma command register */
 592         unsigned long   dma_vendor1;    /* dma vendor 1 register */
 593         unsigned long   dma_status;     /* dma status register */
 594         unsigned long   dma_vendor3;    /* dma vendor 3 register */
 595         unsigned long   dma_prdtable;   /* actual prd table address */
 596
 597         unsigned long   config_data;    /* for use by chipset-specific code */
 598         unsigned long   select_data;    /* for use by chipset-specific code */
 599
 600         unsigned long   extra_base;     /* extra addr for dma ports */
 601         unsigned        extra_ports;    /* number of extra dma ports */
 602
 603         unsigned        noprobe    : 1; /* don't probe for this interface */
 604         unsigned        present    : 1; /* this interface exists */
 605         unsigned        hold       : 1; /* this interface is always present */
 606         unsigned        serialized : 1; /* serialized all channel operation */
 607         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 608         unsigned        reset      : 1; /* reset after probe */
 609         unsigned        auto_poll  : 1; /* supports nop auto-poll */
 610         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 611         unsigned        no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */
 612         unsigned        mmio       : 1; /* host uses MMIO */
 613
 614         struct device   gendev;
 615         struct completion gendev_rel_comp; /* To deal with device release() */
 616
 617         void            *hwif_data;     /* extra hwif data */
 618
 619         unsigned dma;
 620
 621 #ifdef CONFIG_BLK_DEV_IDEACPI
 622         struct ide_acpi_hwif_link *acpidata;
 623 #endif
 624 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 625
 626 /*
 627  *  internal ide interrupt handler type
 628  */
 629 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 630 typedef int (ide_expiry_t)(ide_drive_t *);
 631
 632 typedef struct hwgroup_s {
 633                 /* irq handler, if active */
 634         ide_startstop_t (*handler)(ide_drive_t *);
 635                 /* irq handler, suspended if active */
 636         ide_startstop_t (*handler_save)(ide_drive_t *);
 637                 /* BOOL: protects all fields below */
 638         volatile int busy;
 639                 /* BOOL: wake us up on timer expiry */
 640         unsigned int sleeping   : 1;
 641                 /* BOOL: polling active & poll_timeout field valid */
 642         unsigned int polling    : 1;
 643                 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
 644         unsigned int resetting  : 1;
 645
 646                 /* current drive */
 647         ide_drive_t *drive;
 648                 /* ptr to current hwif in linked-list */
 649         ide_hwif_t *hwif;
 650
 651                 /* for pci chipsets */
 652         struct pci_dev *pci_dev;
 653
 654                 /* current request */
 655         struct request *rq;
 656                 /* failsafe timer */
 657         struct timer_list timer;
 658                 /* local copy of current write rq */
 659         struct request wrq;
 660                 /* timeout value during long polls */
 661         unsigned long poll_timeout;
 662                 /* queried upon timeouts */
 663         int (*expiry)(ide_drive_t *);
 664                 /* ide_system_bus_speed */
 665         int pio_clock;
 666         int req_gen;
 667         int req_gen_timer;
 668
 669         unsigned char cmd_buf[4];
 670 } ide_hwgroup_t;
 671
 672 typedef struct ide_driver_s ide_driver_t;
 673
 674 extern struct mutex ide_setting_mtx;
 675
 676 int set_io_32bit(ide_drive_t *, int);
 677 int set_pio_mode(ide_drive_t *, int);
 678 int set_using_dma(ide_drive_t *, int);
 679
 680 #ifdef CONFIG_IDE_PROC_FS
 681 /*
 682  * configurable drive settings
 683  */
 684
 685 #define TYPE_INT        0
 686 #define TYPE_BYTE       1
 687 #define TYPE_SHORT      2
 688
 689 #define SETTING_READ    (1 << 0)
 690 #define SETTING_WRITE   (1 << 1)
 691 #define SETTING_RW      (SETTING_READ | SETTING_WRITE)
 692
 693 typedef int (ide_procset_t)(ide_drive_t *, int);
 694 typedef struct ide_settings_s {
 695         char                    *name;
 696         int                     rw;
 697         int                     data_type;
 698         int                     min;
 699         int                     max;
 700         int                     mul_factor;
 701         int                     div_factor;
 702         void                    *data;
 703         ide_procset_t           *set;
 704         int                     auto_remove;
 705         struct ide_settings_s   *next;
 706 } ide_settings_t;
 707
 708 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
 709
 710 /*
 711  * /proc/ide interface
 712  */
 713 typedef struct {
 714         const char      *name;
 715         mode_t          mode;
 716         read_proc_t     *read_proc;
 717         write_proc_t    *write_proc;
 718 } ide_proc_entry_t;
 719
 720 void proc_ide_create(void);
 721 void proc_ide_destroy(void);
 722 void ide_proc_register_port(ide_hwif_t *);
 723 void ide_proc_unregister_port(ide_hwif_t *);
 724 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
 725 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
 726
 727 void ide_add_generic_settings(ide_drive_t *);
 728
 729 read_proc_t proc_ide_read_capacity;
 730 read_proc_t proc_ide_read_geometry;
 731
 732 #ifdef CONFIG_BLK_DEV_IDEPCI
 733 void ide_pci_create_host_proc(const char *, get_info_t *);
 734 #endif
 735
 736 /*
 737  * Standard exit stuff:
 738  */
 739 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
 740 {                                       \
 741         len -= off;                     \
 742         if (len < count) {              \
 743                 *eof = 1;               \
 744                 if (len <= 0)           \
 745                         return 0;       \
 746         } else                          \
 747                 len = count;            \
 748         *start = page + off;            \
 749         return len;                     \
 750 }
 751 #else
 752 static inline void proc_ide_create(void) { ; }
 753 static inline void proc_ide_destroy(void) { ; }
 754 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
 755 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
 756 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 757 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 758 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 759 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 760 #endif
 761
 762 /*
 763  * Power Management step value (rq->pm->pm_step).
 764  *
 765  * The step value starts at 0 (ide_pm_state_start_suspend) for a
 766  * suspend operation or 1000 (ide_pm_state_start_resume) for a
 767  * resume operation.
 768  *
 769  * For each step, the core calls the subdriver start_power_step() first.
 770  * This can return:
 771  *      - ide_stopped : In this case, the core calls us back again unless
 772  *                      step have been set to ide_power_state_completed.
 773  *      - ide_started : In this case, the channel is left busy until an
 774  *                      async event (interrupt) occurs.
 775  * Typically, start_power_step() will issue a taskfile request with
 776  * do_rw_taskfile().
 777  *
 778  * Upon reception of the interrupt, the core will call complete_power_step()
 779  * with the error code if any. This routine should update the step value
 780  * and return. It should not start a new request. The core will call
 781  * start_power_step for the new step value, unless step have been set to
 782  * ide_power_state_completed.
 783  *
 784  * Subdrivers are expected to define their own additional power
 785  * steps from 1..999 for suspend and from 1001..1999 for resume,
 786  * other values are reserved for future use.
 787  */
 788
 789 enum {
 790         ide_pm_state_completed          = -1,
 791         ide_pm_state_start_suspend      = 0,
 792         ide_pm_state_start_resume       = 1000,
 793 };
 794
 795 /*
 796  * Subdrivers support.
 797  *
 798  * The gendriver.owner field should be set to the module owner of this driver.
 799  * The gendriver.name field should be set to the name of this driver
 800  */
 801 struct ide_driver_s {
 802         const char                      *version;
 803         u8                              media;
 804         unsigned supports_dsc_overlap   : 1;
 805         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
 806         int             (*end_request)(ide_drive_t *, int, int);
 807         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
 808         ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
 809         struct device_driver    gen_driver;
 810         int             (*probe)(ide_drive_t *);
 811         void            (*remove)(ide_drive_t *);
 812         void            (*resume)(ide_drive_t *);
 813         void            (*shutdown)(ide_drive_t *);
 814 #ifdef CONFIG_IDE_PROC_FS
 815         ide_proc_entry_t        *proc;
 816 #endif
 817 };
 818
 819 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
 820
 821 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
 822
 823 /*
 824  * ide_hwifs[] is the master data structure used to keep track
 825  * of just about everything in ide.c.  Whenever possible, routines
 826  * should be using pointers to a drive (ide_drive_t *) or
 827  * pointers to a hwif (ide_hwif_t *), rather than indexing this
 828  * structure directly (the allocation/layout may change!).
 829  *
 830  */
 831 #ifndef _IDE_C
 832 extern  ide_hwif_t      ide_hwifs[];            /* master data repository */
 833 #endif
 834 extern int noautodma;
 835
 836 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
 837 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
 838                              int uptodate, int nr_sectors);
 839
 840 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
 841
 842 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
 843                          ide_expiry_t *);
 844
 845 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
 846
 847 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
 848
 849 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
 850
 851 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
 852
 853 extern void ide_fix_driveid(struct hd_driveid *);
 854
 855 extern void ide_fixstring(u8 *, const int, const int);
 856
 857 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
 858
 859 extern ide_startstop_t ide_do_reset (ide_drive_t *);
 860
 861 extern void ide_init_drive_cmd (struct request *rq);
 862
 863 /*
 864  * "action" parameter type for ide_do_drive_cmd() below.
 865  */
 866 typedef enum {
 867         ide_wait,       /* insert rq at end of list, and wait for it */
 868         ide_preempt,    /* insert rq in front of current request */
 869         ide_head_wait,  /* insert rq in front of current request and wait for it */
 870         ide_end         /* insert rq at end of list, but don't wait for it */
 871 } ide_action_t;
 872
 873 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
 874
 875 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
 876
 877 /*
 878  * Issue ATA command and wait for completion.
 879  * Use for implementing commands in kernel
 880  *
 881  *  (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 882  */
 883 extern int ide_wait_cmd(ide_drive_t *, u8, u8, u8, u8, u8 *);
 884
 885 enum {
 886         IDE_TFLAG_LBA48                 = (1 << 0),
 887         IDE_TFLAG_NO_SELECT_MASK        = (1 << 1),
 888         IDE_TFLAG_FLAGGED               = (1 << 2),
 889         IDE_TFLAG_OUT_DATA              = (1 << 3),
 890         IDE_TFLAG_OUT_HOB_FEATURE       = (1 << 4),
 891         IDE_TFLAG_OUT_HOB_NSECT         = (1 << 5),
 892         IDE_TFLAG_OUT_HOB_LBAL          = (1 << 6),
 893         IDE_TFLAG_OUT_HOB_LBAM          = (1 << 7),
 894         IDE_TFLAG_OUT_HOB_LBAH          = (1 << 8),
 895         IDE_TFLAG_OUT_HOB               = IDE_TFLAG_OUT_HOB_FEATURE |
 896                                           IDE_TFLAG_OUT_HOB_NSECT |
 897                                           IDE_TFLAG_OUT_HOB_LBAL |
 898                                           IDE_TFLAG_OUT_HOB_LBAM |
 899                                           IDE_TFLAG_OUT_HOB_LBAH,
 900         IDE_TFLAG_OUT_FEATURE           = (1 << 9),
 901         IDE_TFLAG_OUT_NSECT             = (1 << 10),
 902         IDE_TFLAG_OUT_LBAL              = (1 << 11),
 903         IDE_TFLAG_OUT_LBAM              = (1 << 12),
 904         IDE_TFLAG_OUT_LBAH              = (1 << 13),
 905         IDE_TFLAG_OUT_TF                = IDE_TFLAG_OUT_FEATURE |
 906                                           IDE_TFLAG_OUT_NSECT |
 907                                           IDE_TFLAG_OUT_LBAL |
 908                                           IDE_TFLAG_OUT_LBAM |
 909                                           IDE_TFLAG_OUT_LBAH,
 910         IDE_TFLAG_OUT_DEVICE            = (1 << 14),
 911         IDE_TFLAG_WRITE                 = (1 << 15),
 912         IDE_TFLAG_FLAGGED_SET_IN_FLAGS  = (1 << 16),
 913         IDE_TFLAG_IN_DATA               = (1 << 17),
 914 };
 915
 916 struct ide_taskfile {
 917         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
 918
 919         u8      hob_feature;    /*  1-5: additional data to support LBA48 */
 920         u8      hob_nsect;
 921         u8      hob_lbal;
 922         u8      hob_lbam;
 923         u8      hob_lbah;
 924
 925         u8      data;           /*  6: low data byte (for TASKFILE IOCTL) */
 926
 927         union {                 /*  7: */
 928                 u8 error;       /*   read:  error */
 929                 u8 feature;     /*  write: feature */
 930         };
 931
 932         u8      nsect;          /*  8: number of sectors */
 933         u8      lbal;           /*  9: LBA low */
 934         u8      lbam;           /* 10: LBA mid */
 935         u8      lbah;           /* 11: LBA high */
 936
 937         u8      device;         /* 12: device select */
 938
 939         union {                 /* 13: */
 940                 u8 status;      /*  read: status  */
 941                 u8 command;     /* write: command */
 942         };
 943 };
 944
 945 typedef struct ide_task_s {
 946         union {
 947                 struct ide_taskfile     tf;
 948                 u8                      tf_array[14];
 949         };
 950         u32                     tf_flags;
 951         int                     data_phase;
 952         ide_handler_t           *handler;
 953         struct request          *rq;            /* copy of request */
 954         void                    *special;       /* valid_t generally */
 955 } ide_task_t;
 956
 957 void ide_tf_load(ide_drive_t *, ide_task_t *);
 958
 959 extern u32 ide_read_24(ide_drive_t *);
 960
 961 extern void SELECT_DRIVE(ide_drive_t *);
 962 extern void SELECT_MASK(ide_drive_t *, int);
 963
 964 extern int drive_is_ready(ide_drive_t *);
 965
 966 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
 967
 968 /*
 969  * taskfile io for disks for now...and builds request from ide_ioctl
 970  */
 971 extern ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
 972
 973 extern ide_startstop_t set_multmode_intr(ide_drive_t *);
 974 extern ide_startstop_t set_geometry_intr(ide_drive_t *);
 975 extern ide_startstop_t recal_intr(ide_drive_t *);
 976 extern ide_startstop_t task_in_intr(ide_drive_t *);
 977 extern ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 978
 979 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
 980 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
 981
 982 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
 983 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
 984 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
 985
 986 extern int system_bus_clock(void);
 987
 988 extern int ide_driveid_update(ide_drive_t *);
 989 extern int ide_ata66_check(ide_drive_t *, ide_task_t *);
 990 extern int ide_config_drive_speed(ide_drive_t *, u8);
 991 extern u8 eighty_ninty_three (ide_drive_t *);
 992 extern int set_transfer(ide_drive_t *, ide_task_t *);
 993 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
 994
 995 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
 996
 997 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
 998
 999 extern int ide_spin_wait_hwgroup(ide_drive_t *);
1000 extern void ide_timer_expiry(unsigned long);
1001 extern irqreturn_t ide_intr(int irq, void *dev_id);
1002 extern void do_ide_request(struct request_queue *);
1003
1004 void ide_init_disk(struct gendisk *, ide_drive_t *);
1005
1006 extern int ideprobe_init(void);
1007
1008 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
1009 extern void ide_scan_pcibus(int scan_direction) __init;
1010 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
1011 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
1012 #else
1013 #define ide_pci_register_driver(d) pci_register_driver(d)
1014 #endif
1015
1016 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1017 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1018
1019 extern void default_hwif_iops(ide_hwif_t *);
1020 extern void default_hwif_mmiops(ide_hwif_t *);
1021 extern void default_hwif_transport(ide_hwif_t *);
1022
1023 typedef struct ide_pci_enablebit_s {
1024         u8      reg;    /* byte pci reg holding the enable-bit */
1025         u8      mask;   /* mask to isolate the enable-bit */
1026         u8      val;    /* value of masked reg when "enabled" */
1027 } ide_pci_enablebit_t;
1028
1029 enum {
1030         /* Uses ISA control ports not PCI ones. */
1031         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1032         /* single port device */
1033         IDE_HFLAG_SINGLE                = (1 << 1),
1034         /* don't use legacy PIO blacklist */
1035         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1036         /* don't use conservative PIO "downgrade" */
1037         IDE_HFLAG_PIO_NO_DOWNGRADE      = (1 << 3),
1038         /* use PIO8/9 for prefetch off/on */
1039         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1040         /* use PIO6/7 for fast-devsel off/on */
1041         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1042         /* use 100-102 and 200-202 PIO values to set DMA modes */
1043         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1044         /*
1045          * keep DMA setting when programming PIO mode, may be used only
1046          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1047          */
1048         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1049         /* program host for the transfer mode after programming device */
1050         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1051         /* don't program host/device for the transfer mode ("smart" hosts) */
1052         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1053         /* trust BIOS for programming chipset/device for DMA */
1054         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1055         /* host uses VDMA */
1056         IDE_HFLAG_VDMA                  = (1 << 11),
1057         /* ATAPI DMA is unsupported */
1058         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1059         /* set if host is a "bootable" controller */
1060         IDE_HFLAG_BOOTABLE              = (1 << 13),
1061         /* host doesn't support DMA */
1062         IDE_HFLAG_NO_DMA                = (1 << 14),
1063         /* check if host is PCI IDE device before allowing DMA */
1064         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1065         /* host is CS5510/CS5520 */
1066         IDE_HFLAG_CS5520                = (1 << 16),
1067         /* no LBA48 */
1068         IDE_HFLAG_NO_LBA48              = (1 << 17),
1069         /* no LBA48 DMA */
1070         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1071         /* data FIFO is cleared by an error */
1072         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1073         /* serialize ports */
1074         IDE_HFLAG_SERIALIZE             = (1 << 20),
1075         /* use legacy IRQs */
1076         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1077         /* force use of legacy IRQs */
1078         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1079         /* limit LBA48 requests to 256 sectors */
1080         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1081         /* use 32-bit I/O ops */
1082         IDE_HFLAG_IO_32BIT              = (1 << 24),
1083         /* unmask IRQs */
1084         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1085 };
1086
1087 #ifdef CONFIG_BLK_DEV_OFFBOARD
1088 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_BOOTABLE
1089 #else
1090 # define IDE_HFLAG_OFF_BOARD    0
1091 #endif
1092
1093 struct ide_port_info {
1094         char                    *name;
1095         unsigned int            (*init_chipset)(struct pci_dev *, const char *);
1096         void                    (*init_iops)(ide_hwif_t *);
1097         void                    (*init_hwif)(ide_hwif_t *);
1098         void                    (*init_dma)(ide_hwif_t *, unsigned long);
1099         void                    (*fixup)(ide_hwif_t *);
1100         ide_pci_enablebit_t     enablebits[2];
1101         hwif_chipset_t          chipset;
1102         unsigned int            extra;
1103         u32                     host_flags;
1104         u8                      pio_mask;
1105         u8                      swdma_mask;
1106         u8                      mwdma_mask;
1107         u8                      udma_mask;
1108 };
1109
1110 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1111 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1112
1113 void ide_map_sg(ide_drive_t *, struct request *);
1114 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1115
1116 #define BAD_DMA_DRIVE           0
1117 #define GOOD_DMA_DRIVE          1
1118
1119 struct drive_list_entry {
1120         const char *id_model;
1121         const char *id_firmware;
1122 };
1123
1124 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1125
1126 #ifdef CONFIG_BLK_DEV_IDEDMA
1127 int __ide_dma_bad_drive(ide_drive_t *);
1128 int ide_id_dma_bug(ide_drive_t *);
1129
1130 u8 ide_find_dma_mode(ide_drive_t *, u8);
1131
1132 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1133 {
1134         return ide_find_dma_mode(drive, XFER_UDMA_6);
1135 }
1136
1137 void ide_dma_off(ide_drive_t *);
1138 int ide_set_dma(ide_drive_t *);
1139 ide_startstop_t ide_dma_intr(ide_drive_t *);
1140
1141 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1142 extern int ide_build_sglist(ide_drive_t *, struct request *);
1143 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1144 extern void ide_destroy_dmatable(ide_drive_t *);
1145 extern int ide_release_dma(ide_hwif_t *);
1146 extern void ide_setup_dma(ide_hwif_t *, unsigned long, unsigned int);
1147
1148 void ide_dma_host_off(ide_drive_t *);
1149 void ide_dma_off_quietly(ide_drive_t *);
1150 void ide_dma_host_on(ide_drive_t *);
1151 extern int __ide_dma_on(ide_drive_t *);
1152 extern int ide_dma_setup(ide_drive_t *);
1153 extern void ide_dma_start(ide_drive_t *);
1154 extern int __ide_dma_end(ide_drive_t *);
1155 extern void ide_dma_lost_irq(ide_drive_t *);
1156 extern void ide_dma_timeout(ide_drive_t *);
1157 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
1158
1159 #else
1160 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1161 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1162 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1163 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1164 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1165 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1166 #endif /* CONFIG_BLK_DEV_IDEDMA */
1167
1168 #ifndef CONFIG_BLK_DEV_IDEDMA_PCI
1169 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1170 #endif
1171
1172 #ifdef CONFIG_BLK_DEV_IDEACPI
1173 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1174 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1175 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1176 extern void ide_acpi_init(ide_hwif_t *hwif);
1177 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1178 #else
1179 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1180 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1181 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1182 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1183 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1184 #endif
1185
1186 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1187 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1188 extern void ide_unregister (unsigned int index);
1189
1190 void ide_register_region(struct gendisk *);
1191 void ide_unregister_region(struct gendisk *);
1192
1193 void ide_undecoded_slave(ide_hwif_t *);
1194
1195 int ide_device_add(u8 idx[4]);
1196
1197 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1198 {
1199         return hwif->hwif_data;
1200 }
1201
1202 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1203 {
1204         hwif->hwif_data = data;
1205 }
1206
1207 const char *ide_xfer_verbose(u8 mode);
1208 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1209 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1210
1211 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1212 {
1213         return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1214 }
1215
1216 static inline int ide_dev_is_sata(struct hd_driveid *id)
1217 {
1218         /*
1219          * See if word 93 is 0 AND drive is at least ATA-5 compatible
1220          * verifying that word 80 by casting it to a signed type --
1221          * this trick allows us to filter out the reserved values of
1222          * 0x0000 and 0xffff along with the earlier ATA revisions...
1223          */
1224         if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1225                 return 1;
1226         return 0;
1227 }
1228
1229 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1230
1231 typedef struct ide_pio_timings_s {
1232         int     setup_time;     /* Address setup (ns) minimum */
1233         int     active_time;    /* Active pulse (ns) minimum */
1234         int     cycle_time;     /* Cycle time (ns) minimum = */
1235                                 /* active + recovery (+ setup for some chips) */
1236 } ide_pio_timings_t;
1237
1238 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1239 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1240 extern const ide_pio_timings_t ide_pio_timings[6];
1241
1242 int ide_set_pio_mode(ide_drive_t *, u8);
1243 int ide_set_dma_mode(ide_drive_t *, u8);
1244
1245 void ide_set_pio(ide_drive_t *, u8);
1246
1247 static inline void ide_set_max_pio(ide_drive_t *drive)
1248 {
1249         ide_set_pio(drive, 255);
1250 }
1251
1252 extern spinlock_t ide_lock;
1253 extern struct mutex ide_cfg_mtx;
1254 /*
1255  * Structure locking:
1256  *
1257  * ide_cfg_mtx and ide_lock together protect changes to
1258  * ide_hwif_t->{next,hwgroup}
1259  * ide_drive_t->next
1260  *
1261  * ide_hwgroup_t->busy: ide_lock
1262  * ide_hwgroup_t->hwif: ide_lock
1263  * ide_hwif_t->mate: constant, no locking
1264  * ide_drive_t->hwif: constant, no locking
1265  */
1266
1267 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1268
1269 extern struct bus_type ide_bus_type;
1270
1271 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1272 #define ide_id_has_flush_cache(id)      ((id)->cfs_enable_2 & 0x3000)
1273
1274 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1275 #define ide_id_has_flush_cache_ext(id)  \
1276         (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1277
1278 static inline int hwif_to_node(ide_hwif_t *hwif)
1279 {
1280         struct pci_dev *dev = hwif->pci_dev;
1281         return dev ? pcibus_to_node(dev->bus) : -1;
1282 }
1283
1284 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1285 {
1286         ide_hwif_t *hwif        = HWIF(drive);
1287
1288         return &hwif->drives[(drive->dn ^ 1) & 1];
1289 }
1290
1291 #endif /* _IDE_H */