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/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 #ifdef CONFIG_BLK_DEV_IDEACPI
  21 #include <acpi/acpi.h>
  22 #endif
  23 #include <asm/byteorder.h>
  24 #include <asm/system.h>
  25 #include <asm/io.h>
  26 #include <asm/semaphore.h>
  27 #include <asm/mutex.h>
  28
  29 #if defined(CRIS) || defined(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 /*
  52  * Tune flags
  53  */
  54 #define IDE_TUNE_NOAUTO         2
  55 #define IDE_TUNE_AUTO           1
  56 #define IDE_TUNE_DEFAULT        0
  57
  58 /*
  59  * state flags
  60  */
  61
  62 #define DMA_PIO_RETRY   1       /* retrying in PIO */
  63
  64 #define HWIF(drive)             ((ide_hwif_t *)((drive)->hwif))
  65 #define HWGROUP(drive)          ((ide_hwgroup_t *)(HWIF(drive)->hwgroup))
  66
  67 /*
  68  * Definitions for accessing IDE controller registers
  69  */
  70 #define IDE_NR_PORTS            (10)
  71
  72 #define IDE_DATA_OFFSET         (0)
  73 #define IDE_ERROR_OFFSET        (1)
  74 #define IDE_NSECTOR_OFFSET      (2)
  75 #define IDE_SECTOR_OFFSET       (3)
  76 #define IDE_LCYL_OFFSET         (4)
  77 #define IDE_HCYL_OFFSET         (5)
  78 #define IDE_SELECT_OFFSET       (6)
  79 #define IDE_STATUS_OFFSET       (7)
  80 #define IDE_CONTROL_OFFSET      (8)
  81 #define IDE_IRQ_OFFSET          (9)
  82
  83 #define IDE_FEATURE_OFFSET      IDE_ERROR_OFFSET
  84 #define IDE_COMMAND_OFFSET      IDE_STATUS_OFFSET
  85
  86 #define IDE_DATA_REG            (HWIF(drive)->io_ports[IDE_DATA_OFFSET])
  87 #define IDE_ERROR_REG           (HWIF(drive)->io_ports[IDE_ERROR_OFFSET])
  88 #define IDE_NSECTOR_REG         (HWIF(drive)->io_ports[IDE_NSECTOR_OFFSET])
  89 #define IDE_SECTOR_REG          (HWIF(drive)->io_ports[IDE_SECTOR_OFFSET])
  90 #define IDE_LCYL_REG            (HWIF(drive)->io_ports[IDE_LCYL_OFFSET])
  91 #define IDE_HCYL_REG            (HWIF(drive)->io_ports[IDE_HCYL_OFFSET])
  92 #define IDE_SELECT_REG          (HWIF(drive)->io_ports[IDE_SELECT_OFFSET])
  93 #define IDE_STATUS_REG          (HWIF(drive)->io_ports[IDE_STATUS_OFFSET])
  94 #define IDE_CONTROL_REG         (HWIF(drive)->io_ports[IDE_CONTROL_OFFSET])
  95 #define IDE_IRQ_REG             (HWIF(drive)->io_ports[IDE_IRQ_OFFSET])
  96
  97 #define IDE_FEATURE_REG         IDE_ERROR_REG
  98 #define IDE_COMMAND_REG         IDE_STATUS_REG
  99 #define IDE_ALTSTATUS_REG       IDE_CONTROL_REG
 100 #define IDE_IREASON_REG         IDE_NSECTOR_REG
 101 #define IDE_BCOUNTL_REG         IDE_LCYL_REG
 102 #define IDE_BCOUNTH_REG         IDE_HCYL_REG
 103
 104 #define OK_STAT(stat,good,bad)  (((stat)&((good)|(bad)))==(good))
 105 #define BAD_R_STAT              (BUSY_STAT   | ERR_STAT)
 106 #define BAD_W_STAT              (BAD_R_STAT  | WRERR_STAT)
 107 #define BAD_STAT                (BAD_R_STAT  | DRQ_STAT)
 108 #define DRIVE_READY             (READY_STAT  | SEEK_STAT)
 109
 110 #define BAD_CRC                 (ABRT_ERR    | ICRC_ERR)
 111
 112 #define SATA_NR_PORTS           (3)     /* 16 possible ?? */
 113
 114 #define SATA_STATUS_OFFSET      (0)
 115 #define SATA_ERROR_OFFSET       (1)
 116 #define SATA_CONTROL_OFFSET     (2)
 117
 118 /*
 119  * Our Physical Region Descriptor (PRD) table should be large enough
 120  * to handle the biggest I/O request we are likely to see.  Since requests
 121  * can have no more than 256 sectors, and since the typical blocksize is
 122  * two or more sectors, we could get by with a limit of 128 entries here for
 123  * the usual worst case.  Most requests seem to include some contiguous blocks,
 124  * further reducing the number of table entries required.
 125  *
 126  * The driver reverts to PIO mode for individual requests that exceed
 127  * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling
 128  * 100% of all crazy scenarios here is not necessary.
 129  *
 130  * As it turns out though, we must allocate a full 4KB page for this,
 131  * so the two PRD tables (ide0 & ide1) will each get half of that,
 132  * allowing each to have about 256 entries (8 bytes each) from this.
 133  */
 134 #define PRD_BYTES       8
 135 #define PRD_ENTRIES     256
 136
 137 /*
 138  * Some more useful definitions
 139  */
 140 #define PARTN_BITS      6       /* number of minor dev bits for partitions */
 141 #define MAX_DRIVES      2       /* per interface; 2 assumed by lots of code */
 142 #define SECTOR_SIZE     512
 143 #define SECTOR_WORDS    (SECTOR_SIZE / 4)       /* number of 32bit words per sector */
 144 #define IDE_LARGE_SEEK(b1,b2,t) (((b1) > (b2) + (t)) || ((b2) > (b1) + (t)))
 145
 146 /*
 147  * Timeouts for various operations:
 148  */
 149 #define WAIT_DRQ        (HZ/10)         /* 100msec - spec allows up to 20ms */
 150 #define WAIT_READY      (5*HZ)          /* 5sec - some laptops are very slow */
 151 #define WAIT_PIDENTIFY  (10*HZ) /* 10sec  - should be less than 3ms (?), if all ATAPI CD is closed at boot */
 152 #define WAIT_WORSTCASE  (30*HZ) /* 30sec  - worst case when spinning up */
 153 #define WAIT_CMD        (10*HZ) /* 10sec  - maximum wait for an IRQ to happen */
 154 #define WAIT_MIN_SLEEP  (2*HZ/100)      /* 20msec - minimum sleep time */
 155
 156 /*
 157  * Check for an interrupt and acknowledge the interrupt status
 158  */
 159 struct hwif_s;
 160 typedef int (ide_ack_intr_t)(struct hwif_s *);
 161
 162 /*
 163  * hwif_chipset_t is used to keep track of the specific hardware
 164  * chipset used by each IDE interface, if known.
 165  */
 166 enum {          ide_unknown,    ide_generic,    ide_pci,
 167                 ide_cmd640,     ide_dtc2278,    ide_ali14xx,
 168                 ide_qd65xx,     ide_umc8672,    ide_ht6560b,
 169                 ide_rz1000,     ide_trm290,
 170                 ide_cmd646,     ide_cy82c693,   ide_4drives,
 171                 ide_pmac,       ide_etrax100,   ide_acorn,
 172                 ide_au1xxx,     ide_palm3710,   ide_forced
 173 };
 174
 175 typedef u8 hwif_chipset_t;
 176
 177 /*
 178  * Structure to hold all information about the location of this port
 179  */
 180 typedef struct hw_regs_s {
 181         unsigned long   io_ports[IDE_NR_PORTS]; /* task file registers */
 182         int             irq;                    /* our irq number */
 183         ide_ack_intr_t  *ack_intr;              /* acknowledge interrupt */
 184         hwif_chipset_t  chipset;
 185         struct device   *dev;
 186 } hw_regs_t;
 187
 188 struct hwif_s * ide_find_port(unsigned long);
 189 struct hwif_s *ide_deprecated_find_port(unsigned long);
 190 void ide_init_port_data(struct hwif_s *, unsigned int);
 191 void ide_init_port_hw(struct hwif_s *, hw_regs_t *);
 192
 193 struct ide_drive_s;
 194 int ide_register_hw(hw_regs_t *, void (*)(struct ide_drive_s *),
 195                     struct hwif_s **);
 196
 197 static inline void ide_std_init_ports(hw_regs_t *hw,
 198                                       unsigned long io_addr,
 199                                       unsigned long ctl_addr)
 200 {
 201         unsigned int i;
 202
 203         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++)
 204                 hw->io_ports[i] = io_addr++;
 205
 206         hw->io_ports[IDE_CONTROL_OFFSET] = ctl_addr;
 207 }
 208
 209 #include <asm/ide.h>
 210
 211 #if !defined(MAX_HWIFS) || defined(CONFIG_EMBEDDED)
 212 #undef MAX_HWIFS
 213 #define MAX_HWIFS       CONFIG_IDE_MAX_HWIFS
 214 #endif
 215
 216 /* needed on alpha, x86/x86_64, ia64, mips, ppc32 and sh */
 217 #ifndef IDE_ARCH_OBSOLETE_DEFAULTS
 218 # define ide_default_io_base(index)     (0)
 219 # define ide_default_irq(base)          (0)
 220 # define ide_init_default_irq(base)     (0)
 221 #endif
 222
 223 #ifdef CONFIG_IDE_ARCH_OBSOLETE_INIT
 224 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 225                                        unsigned long io_addr,
 226                                        unsigned long ctl_addr,
 227                                        int *irq)
 228 {
 229         if (!ctl_addr)
 230                 ide_std_init_ports(hw, io_addr, ide_default_io_ctl(io_addr));
 231         else
 232                 ide_std_init_ports(hw, io_addr, ctl_addr);
 233
 234         if (irq)
 235                 *irq = 0;
 236
 237         hw->io_ports[IDE_IRQ_OFFSET] = 0;
 238
 239 #ifdef CONFIG_PPC32
 240         if (ppc_ide_md.ide_init_hwif)
 241                 ppc_ide_md.ide_init_hwif(hw, io_addr, ctl_addr, irq);
 242 #endif
 243 }
 244 #else
 245 static inline void ide_init_hwif_ports(hw_regs_t *hw,
 246                                        unsigned long io_addr,
 247                                        unsigned long ctl_addr,
 248                                        int *irq)
 249 {
 250         if (io_addr || ctl_addr)
 251                 printk(KERN_WARNING "%s: must not be called\n", __FUNCTION__);
 252 }
 253 #endif /* CONFIG_IDE_ARCH_OBSOLETE_INIT */
 254
 255 /* Currently only m68k, apus and m8xx need it */
 256 #ifndef IDE_ARCH_ACK_INTR
 257 # define ide_ack_intr(hwif) (1)
 258 #endif
 259
 260 /* Currently only Atari needs it */
 261 #ifndef IDE_ARCH_LOCK
 262 # define ide_release_lock()                     do {} while (0)
 263 # define ide_get_lock(hdlr, data)               do {} while (0)
 264 #endif /* IDE_ARCH_LOCK */
 265
 266 /*
 267  * Now for the data we need to maintain per-drive:  ide_drive_t
 268  */
 269
 270 #define ide_scsi        0x21
 271 #define ide_disk        0x20
 272 #define ide_optical     0x7
 273 #define ide_cdrom       0x5
 274 #define ide_tape        0x1
 275 #define ide_floppy      0x0
 276
 277 /*
 278  * Special Driver Flags
 279  *
 280  * set_geometry : respecify drive geometry
 281  * recalibrate  : seek to cyl 0
 282  * set_multmode : set multmode count
 283  * set_tune     : tune interface for drive
 284  * serviced     : service command
 285  * reserved     : unused
 286  */
 287 typedef union {
 288         unsigned all                    : 8;
 289         struct {
 290                 unsigned set_geometry   : 1;
 291                 unsigned recalibrate    : 1;
 292                 unsigned set_multmode   : 1;
 293                 unsigned set_tune       : 1;
 294                 unsigned serviced       : 1;
 295                 unsigned reserved       : 3;
 296         } b;
 297 } special_t;
 298
 299 /*
 300  * ATA-IDE Select Register, aka Device-Head
 301  *
 302  * head         : always zeros here
 303  * unit         : drive select number: 0/1
 304  * bit5         : always 1
 305  * lba          : using LBA instead of CHS
 306  * bit7         : always 1
 307  */
 308 typedef union {
 309         unsigned all                    : 8;
 310         struct {
 311 #if defined(__LITTLE_ENDIAN_BITFIELD)
 312                 unsigned head           : 4;
 313                 unsigned unit           : 1;
 314                 unsigned bit5           : 1;
 315                 unsigned lba            : 1;
 316                 unsigned bit7           : 1;
 317 #elif defined(__BIG_ENDIAN_BITFIELD)
 318                 unsigned bit7           : 1;
 319                 unsigned lba            : 1;
 320                 unsigned bit5           : 1;
 321                 unsigned unit           : 1;
 322                 unsigned head           : 4;
 323 #else
 324 #error "Please fix <asm/byteorder.h>"
 325 #endif
 326         } b;
 327 } select_t, ata_select_t;
 328
 329 /*
 330  * Status returned from various ide_ functions
 331  */
 332 typedef enum {
 333         ide_stopped,    /* no drive operation was started */
 334         ide_started,    /* a drive operation was started, handler was set */
 335 } ide_startstop_t;
 336
 337 struct ide_driver_s;
 338 struct ide_settings_s;
 339
 340 #ifdef CONFIG_BLK_DEV_IDEACPI
 341 struct ide_acpi_drive_link;
 342 struct ide_acpi_hwif_link;
 343 #endif
 344
 345 typedef struct ide_drive_s {
 346         char            name[4];        /* drive name, such as "hda" */
 347         char            driver_req[10]; /* requests specific driver */
 348
 349         struct request_queue    *queue; /* request queue */
 350
 351         struct request          *rq;    /* current request */
 352         struct ide_drive_s      *next;  /* circular list of hwgroup drives */
 353         void            *driver_data;   /* extra driver data */
 354         struct hd_driveid       *id;    /* drive model identification info */
 355 #ifdef CONFIG_IDE_PROC_FS
 356         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 357         struct ide_settings_s *settings;/* /proc/ide/ drive settings */
 358 #endif
 359         struct hwif_s           *hwif;  /* actually (ide_hwif_t *) */
 360
 361         unsigned long sleep;            /* sleep until this time */
 362         unsigned long service_start;    /* time we started last request */
 363         unsigned long service_time;     /* service time of last request */
 364         unsigned long timeout;          /* max time to wait for irq */
 365
 366         special_t       special;        /* special action flags */
 367         select_t        select;         /* basic drive/head select reg value */
 368
 369         u8      keep_settings;          /* restore settings after drive reset */
 370         u8      using_dma;              /* disk is using dma for read/write */
 371         u8      retry_pio;              /* retrying dma capable host in pio */
 372         u8      state;                  /* retry state */
 373         u8      waiting_for_dma;        /* dma currently in progress */
 374         u8      unmask;                 /* okay to unmask other irqs */
 375         u8      noflush;                /* don't attempt flushes */
 376         u8      dsc_overlap;            /* DSC overlap */
 377         u8      nice1;                  /* give potential excess bandwidth */
 378
 379         unsigned present        : 1;    /* drive is physically present */
 380         unsigned dead           : 1;    /* device ejected hint */
 381         unsigned id_read        : 1;    /* 1=id read from disk 0 = synthetic */
 382         unsigned noprobe        : 1;    /* from:  hdx=noprobe */
 383         unsigned removable      : 1;    /* 1 if need to do check_media_change */
 384         unsigned attach         : 1;    /* needed for removable devices */
 385         unsigned forced_geom    : 1;    /* 1 if hdx=c,h,s was given at boot */
 386         unsigned no_unmask      : 1;    /* disallow setting unmask bit */
 387         unsigned no_io_32bit    : 1;    /* disallow enabling 32bit I/O */
 388         unsigned atapi_overlap  : 1;    /* ATAPI overlap (not supported) */
 389         unsigned doorlocking    : 1;    /* for removable only: door lock/unlock works */
 390         unsigned nodma          : 1;    /* disallow DMA */
 391         unsigned autotune       : 2;    /* 0=default, 1=autotune, 2=noautotune */
 392         unsigned remap_0_to_1   : 1;    /* 0=noremap, 1=remap 0->1 (for EZDrive) */
 393         unsigned blocked        : 1;    /* 1=powermanagment told us not to do anything, so sleep nicely */
 394         unsigned vdma           : 1;    /* 1=doing PIO over DMA 0=doing normal DMA */
 395         unsigned scsi           : 1;    /* 0=default, 1=ide-scsi emulation */
 396         unsigned sleeping       : 1;    /* 1=sleeping & sleep field valid */
 397         unsigned post_reset     : 1;
 398         unsigned udma33_warned  : 1;
 399
 400         u8      addressing;     /* 0=28-bit, 1=48-bit, 2=48-bit doing 28-bit */
 401         u8      quirk_list;     /* considered quirky, set for a specific host */
 402         u8      init_speed;     /* transfer rate set at boot */
 403         u8      current_speed;  /* current transfer rate set */
 404         u8      desired_speed;  /* desired transfer rate set */
 405         u8      dn;             /* now wide spread use */
 406         u8      wcache;         /* status of write cache */
 407         u8      acoustic;       /* acoustic management */
 408         u8      media;          /* disk, cdrom, tape, floppy, ... */
 409         u8      ctl;            /* "normal" value for IDE_CONTROL_REG */
 410         u8      ready_stat;     /* min status value for drive ready */
 411         u8      mult_count;     /* current multiple sector setting */
 412         u8      mult_req;       /* requested multiple sector setting */
 413         u8      tune_req;       /* requested drive tuning setting */
 414         u8      io_32bit;       /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */
 415         u8      bad_wstat;      /* used for ignoring WRERR_STAT */
 416         u8      nowerr;         /* used for ignoring WRERR_STAT */
 417         u8      sect0;          /* offset of first sector for DM6:DDO */
 418         u8      head;           /* "real" number of heads */
 419         u8      sect;           /* "real" sectors per track */
 420         u8      bios_head;      /* BIOS/fdisk/LILO number of heads */
 421         u8      bios_sect;      /* BIOS/fdisk/LILO sectors per track */
 422
 423         unsigned int    bios_cyl;       /* BIOS/fdisk/LILO number of cyls */
 424         unsigned int    cyl;            /* "real" number of cyls */
 425         unsigned int    drive_data;     /* used by set_pio_mode/selectproc */
 426         unsigned int    failures;       /* current failure count */
 427         unsigned int    max_failures;   /* maximum allowed failure count */
 428         u64             probed_capacity;/* initial reported media capacity (ide-cd only currently) */
 429
 430         u64             capacity64;     /* total number of sectors */
 431
 432         int             lun;            /* logical unit */
 433         int             crc_count;      /* crc counter to reduce drive speed */
 434 #ifdef CONFIG_BLK_DEV_IDEACPI
 435         struct ide_acpi_drive_link *acpidata;
 436 #endif
 437         struct list_head list;
 438         struct device   gendev;
 439         struct completion gendev_rel_comp;      /* to deal with device release() */
 440 } ide_drive_t;
 441
 442 #define to_ide_device(dev)container_of(dev, ide_drive_t, gendev)
 443
 444 #define IDE_CHIPSET_PCI_MASK    \
 445     ((1<<ide_pci)|(1<<ide_cmd646)|(1<<ide_ali14xx))
 446 #define IDE_CHIPSET_IS_PCI(c)   ((IDE_CHIPSET_PCI_MASK >> (c)) & 1)
 447
 448 struct ide_port_info;
 449
 450 typedef struct hwif_s {
 451         struct hwif_s *next;            /* for linked-list in ide_hwgroup_t */
 452         struct hwif_s *mate;            /* other hwif from same PCI chip */
 453         struct hwgroup_s *hwgroup;      /* actually (ide_hwgroup_t *) */
 454         struct proc_dir_entry *proc;    /* /proc/ide/ directory entry */
 455
 456         char name[6];                   /* name of interface, eg. "ide0" */
 457
 458                 /* task file registers for pata and sata */
 459         unsigned long   io_ports[IDE_NR_PORTS];
 460         unsigned long   sata_scr[SATA_NR_PORTS];
 461
 462         ide_drive_t     drives[MAX_DRIVES];     /* drive info */
 463
 464         u8 major;       /* our major number */
 465         u8 index;       /* 0 for ide0; 1 for ide1; ... */
 466         u8 channel;     /* for dual-port chips: 0=primary, 1=secondary */
 467         u8 bus_state;   /* power state of the IDE bus */
 468
 469         u32 host_flags;
 470
 471         u8 pio_mask;
 472
 473         u8 ultra_mask;
 474         u8 mwdma_mask;
 475         u8 swdma_mask;
 476
 477         u8 cbl;         /* cable type */
 478
 479         hwif_chipset_t chipset; /* sub-module for tuning.. */
 480
 481         struct device *dev;
 482
 483         const struct ide_port_info *cds;        /* chipset device struct */
 484
 485         ide_ack_intr_t *ack_intr;
 486
 487         void (*rw_disk)(ide_drive_t *, struct request *);
 488
 489 #if 0
 490         ide_hwif_ops_t  *hwifops;
 491 #else
 492         /* host specific initialization of devices on a port */
 493         void    (*port_init_devs)(struct hwif_s *);
 494         /* routine to program host for PIO mode */
 495         void    (*set_pio_mode)(ide_drive_t *, const u8);
 496         /* routine to program host for DMA mode */
 497         void    (*set_dma_mode)(ide_drive_t *, const u8);
 498         /* tweaks hardware to select drive */
 499         void    (*selectproc)(ide_drive_t *);
 500         /* chipset polling based on hba specifics */
 501         int     (*reset_poll)(ide_drive_t *);
 502         /* chipset specific changes to default for device-hba resets */
 503         void    (*pre_reset)(ide_drive_t *);
 504         /* routine to reset controller after a disk reset */
 505         void    (*resetproc)(ide_drive_t *);
 506         /* special host masking for drive selection */
 507         void    (*maskproc)(ide_drive_t *, int);
 508         /* check host's drive quirk list */
 509         void    (*quirkproc)(ide_drive_t *);
 510         /* driver soft-power interface */
 511         int     (*busproc)(ide_drive_t *, int);
 512 #endif
 513         u8 (*mdma_filter)(ide_drive_t *);
 514         u8 (*udma_filter)(ide_drive_t *);
 515
 516         u8 (*cable_detect)(struct hwif_s *);
 517
 518         void (*ata_input_data)(ide_drive_t *, void *, u32);
 519         void (*ata_output_data)(ide_drive_t *, void *, u32);
 520
 521         void (*atapi_input_bytes)(ide_drive_t *, void *, u32);
 522         void (*atapi_output_bytes)(ide_drive_t *, void *, u32);
 523
 524         void (*dma_host_set)(ide_drive_t *, int);
 525         int (*dma_setup)(ide_drive_t *);
 526         void (*dma_exec_cmd)(ide_drive_t *, u8);
 527         void (*dma_start)(ide_drive_t *);
 528         int (*ide_dma_end)(ide_drive_t *drive);
 529         int (*ide_dma_test_irq)(ide_drive_t *drive);
 530         void (*ide_dma_clear_irq)(ide_drive_t *drive);
 531         void (*dma_lost_irq)(ide_drive_t *drive);
 532         void (*dma_timeout)(ide_drive_t *drive);
 533
 534         void (*OUTB)(u8 addr, unsigned long port);
 535         void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
 536         void (*OUTW)(u16 addr, unsigned long port);
 537         void (*OUTSW)(unsigned long port, void *addr, u32 count);
 538         void (*OUTSL)(unsigned long port, void *addr, u32 count);
 539
 540         u8  (*INB)(unsigned long port);
 541         u16 (*INW)(unsigned long port);
 542         void (*INSW)(unsigned long port, void *addr, u32 count);
 543         void (*INSL)(unsigned long port, void *addr, u32 count);
 544
 545         /* dma physical region descriptor table (cpu view) */
 546         unsigned int    *dmatable_cpu;
 547         /* dma physical region descriptor table (dma view) */
 548         dma_addr_t      dmatable_dma;
 549         /* Scatter-gather list used to build the above */
 550         struct scatterlist *sg_table;
 551         int sg_max_nents;               /* Maximum number of entries in it */
 552         int sg_nents;                   /* Current number of entries in it */
 553         int sg_dma_direction;           /* dma transfer direction */
 554
 555         /* data phase of the active command (currently only valid for PIO/DMA) */
 556         int             data_phase;
 557
 558         unsigned int nsect;
 559         unsigned int nleft;
 560         struct scatterlist *cursg;
 561         unsigned int cursg_ofs;
 562
 563         int             rqsize;         /* max sectors per request */
 564         int             irq;            /* our irq number */
 565
 566         unsigned long   dma_base;       /* base addr for dma ports */
 567         unsigned long   dma_command;    /* dma command register */
 568         unsigned long   dma_vendor1;    /* dma vendor 1 register */
 569         unsigned long   dma_status;     /* dma status register */
 570         unsigned long   dma_vendor3;    /* dma vendor 3 register */
 571         unsigned long   dma_prdtable;   /* actual prd table address */
 572
 573         unsigned long   config_data;    /* for use by chipset-specific code */
 574         unsigned long   select_data;    /* for use by chipset-specific code */
 575
 576         unsigned long   extra_base;     /* extra addr for dma ports */
 577         unsigned        extra_ports;    /* number of extra dma ports */
 578
 579         unsigned        noprobe    : 1; /* don't probe for this interface */
 580         unsigned        present    : 1; /* this interface exists */
 581         unsigned        hold       : 1; /* this interface is always present */
 582         unsigned        serialized : 1; /* serialized all channel operation */
 583         unsigned        sharing_irq: 1; /* 1 = sharing irq with another hwif */
 584         unsigned        reset      : 1; /* reset after probe */
 585         unsigned        sg_mapped  : 1; /* sg_table and sg_nents are ready */
 586         unsigned        mmio       : 1; /* host uses MMIO */
 587         unsigned        straight8  : 1; /* Alan's straight 8 check */
 588
 589         struct device   gendev;
 590         struct completion gendev_rel_comp; /* To deal with device release() */
 591
 592         void            *hwif_data;     /* extra hwif data */
 593
 594         unsigned dma;
 595
 596 #ifdef CONFIG_BLK_DEV_IDEACPI
 597         struct ide_acpi_hwif_link *acpidata;
 598 #endif
 599 } ____cacheline_internodealigned_in_smp ide_hwif_t;
 600
 601 /*
 602  *  internal ide interrupt handler type
 603  */
 604 typedef ide_startstop_t (ide_handler_t)(ide_drive_t *);
 605 typedef int (ide_expiry_t)(ide_drive_t *);
 606
 607 /* used by ide-cd, ide-floppy, etc. */
 608 typedef void (xfer_func_t)(ide_drive_t *, void *, u32);
 609
 610 typedef struct hwgroup_s {
 611                 /* irq handler, if active */
 612         ide_startstop_t (*handler)(ide_drive_t *);
 613
 614                 /* BOOL: protects all fields below */
 615         volatile int busy;
 616                 /* BOOL: wake us up on timer expiry */
 617         unsigned int sleeping   : 1;
 618                 /* BOOL: polling active & poll_timeout field valid */
 619         unsigned int polling    : 1;
 620                 /* BOOL: in a polling reset situation. Must not trigger another reset yet */
 621         unsigned int resetting  : 1;
 622
 623                 /* current drive */
 624         ide_drive_t *drive;
 625                 /* ptr to current hwif in linked-list */
 626         ide_hwif_t *hwif;
 627
 628                 /* current request */
 629         struct request *rq;
 630
 631                 /* failsafe timer */
 632         struct timer_list timer;
 633                 /* timeout value during long polls */
 634         unsigned long poll_timeout;
 635                 /* queried upon timeouts */
 636         int (*expiry)(ide_drive_t *);
 637
 638         int req_gen;
 639         int req_gen_timer;
 640 } ide_hwgroup_t;
 641
 642 typedef struct ide_driver_s ide_driver_t;
 643
 644 extern struct mutex ide_setting_mtx;
 645
 646 int set_io_32bit(ide_drive_t *, int);
 647 int set_pio_mode(ide_drive_t *, int);
 648 int set_using_dma(ide_drive_t *, int);
 649
 650 #ifdef CONFIG_IDE_PROC_FS
 651 /*
 652  * configurable drive settings
 653  */
 654
 655 #define TYPE_INT        0
 656 #define TYPE_BYTE       1
 657 #define TYPE_SHORT      2
 658
 659 #define SETTING_READ    (1 << 0)
 660 #define SETTING_WRITE   (1 << 1)
 661 #define SETTING_RW      (SETTING_READ | SETTING_WRITE)
 662
 663 typedef int (ide_procset_t)(ide_drive_t *, int);
 664 typedef struct ide_settings_s {
 665         char                    *name;
 666         int                     rw;
 667         int                     data_type;
 668         int                     min;
 669         int                     max;
 670         int                     mul_factor;
 671         int                     div_factor;
 672         void                    *data;
 673         ide_procset_t           *set;
 674         int                     auto_remove;
 675         struct ide_settings_s   *next;
 676 } ide_settings_t;
 677
 678 int ide_add_setting(ide_drive_t *, const char *, int, int, int, int, int, int, void *, ide_procset_t *set);
 679
 680 /*
 681  * /proc/ide interface
 682  */
 683 typedef struct {
 684         const char      *name;
 685         mode_t          mode;
 686         read_proc_t     *read_proc;
 687         write_proc_t    *write_proc;
 688 } ide_proc_entry_t;
 689
 690 void proc_ide_create(void);
 691 void proc_ide_destroy(void);
 692 void ide_proc_register_port(ide_hwif_t *);
 693 void ide_proc_port_register_devices(ide_hwif_t *);
 694 void ide_proc_unregister_port(ide_hwif_t *);
 695 void ide_proc_register_driver(ide_drive_t *, ide_driver_t *);
 696 void ide_proc_unregister_driver(ide_drive_t *, ide_driver_t *);
 697
 698 void ide_add_generic_settings(ide_drive_t *);
 699
 700 read_proc_t proc_ide_read_capacity;
 701 read_proc_t proc_ide_read_geometry;
 702
 703 #ifdef CONFIG_BLK_DEV_IDEPCI
 704 void ide_pci_create_host_proc(const char *, get_info_t *);
 705 #endif
 706
 707 /*
 708  * Standard exit stuff:
 709  */
 710 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) \
 711 {                                       \
 712         len -= off;                     \
 713         if (len < count) {              \
 714                 *eof = 1;               \
 715                 if (len <= 0)           \
 716                         return 0;       \
 717         } else                          \
 718                 len = count;            \
 719         *start = page + off;            \
 720         return len;                     \
 721 }
 722 #else
 723 static inline void proc_ide_create(void) { ; }
 724 static inline void proc_ide_destroy(void) { ; }
 725 static inline void ide_proc_register_port(ide_hwif_t *hwif) { ; }
 726 static inline void ide_proc_port_register_devices(ide_hwif_t *hwif) { ; }
 727 static inline void ide_proc_unregister_port(ide_hwif_t *hwif) { ; }
 728 static inline void ide_proc_register_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 729 static inline void ide_proc_unregister_driver(ide_drive_t *drive, ide_driver_t *driver) { ; }
 730 static inline void ide_add_generic_settings(ide_drive_t *drive) { ; }
 731 #define PROC_IDE_READ_RETURN(page,start,off,count,eof,len) return 0;
 732 #endif
 733
 734 /*
 735  * Power Management step value (rq->pm->pm_step).
 736  *
 737  * The step value starts at 0 (ide_pm_state_start_suspend) for a
 738  * suspend operation or 1000 (ide_pm_state_start_resume) for a
 739  * resume operation.
 740  *
 741  * For each step, the core calls the subdriver start_power_step() first.
 742  * This can return:
 743  *      - ide_stopped : In this case, the core calls us back again unless
 744  *                      step have been set to ide_power_state_completed.
 745  *      - ide_started : In this case, the channel is left busy until an
 746  *                      async event (interrupt) occurs.
 747  * Typically, start_power_step() will issue a taskfile request with
 748  * do_rw_taskfile().
 749  *
 750  * Upon reception of the interrupt, the core will call complete_power_step()
 751  * with the error code if any. This routine should update the step value
 752  * and return. It should not start a new request. The core will call
 753  * start_power_step for the new step value, unless step have been set to
 754  * ide_power_state_completed.
 755  *
 756  * Subdrivers are expected to define their own additional power
 757  * steps from 1..999 for suspend and from 1001..1999 for resume,
 758  * other values are reserved for future use.
 759  */
 760
 761 enum {
 762         ide_pm_state_completed          = -1,
 763         ide_pm_state_start_suspend      = 0,
 764         ide_pm_state_start_resume       = 1000,
 765 };
 766
 767 /*
 768  * Subdrivers support.
 769  *
 770  * The gendriver.owner field should be set to the module owner of this driver.
 771  * The gendriver.name field should be set to the name of this driver
 772  */
 773 struct ide_driver_s {
 774         const char                      *version;
 775         u8                              media;
 776         unsigned supports_dsc_overlap   : 1;
 777         ide_startstop_t (*do_request)(ide_drive_t *, struct request *, sector_t);
 778         int             (*end_request)(ide_drive_t *, int, int);
 779         ide_startstop_t (*error)(ide_drive_t *, struct request *rq, u8, u8);
 780         ide_startstop_t (*abort)(ide_drive_t *, struct request *rq);
 781         struct device_driver    gen_driver;
 782         int             (*probe)(ide_drive_t *);
 783         void            (*remove)(ide_drive_t *);
 784         void            (*resume)(ide_drive_t *);
 785         void            (*shutdown)(ide_drive_t *);
 786 #ifdef CONFIG_IDE_PROC_FS
 787         ide_proc_entry_t        *proc;
 788 #endif
 789 };
 790
 791 #define to_ide_driver(drv) container_of(drv, ide_driver_t, gen_driver)
 792
 793 int generic_ide_ioctl(ide_drive_t *, struct file *, struct block_device *, unsigned, unsigned long);
 794
 795 /*
 796  * ide_hwifs[] is the master data structure used to keep track
 797  * of just about everything in ide.c.  Whenever possible, routines
 798  * should be using pointers to a drive (ide_drive_t *) or
 799  * pointers to a hwif (ide_hwif_t *), rather than indexing this
 800  * structure directly (the allocation/layout may change!).
 801  *
 802  */
 803 #ifndef _IDE_C
 804 extern  ide_hwif_t      ide_hwifs[];            /* master data repository */
 805 #endif
 806 extern int noautodma;
 807
 808 extern int ide_end_request (ide_drive_t *drive, int uptodate, int nrsecs);
 809 int ide_end_dequeued_request(ide_drive_t *drive, struct request *rq,
 810                              int uptodate, int nr_sectors);
 811
 812 extern void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry);
 813
 814 void ide_execute_command(ide_drive_t *, u8, ide_handler_t *, unsigned int,
 815                          ide_expiry_t *);
 816
 817 ide_startstop_t __ide_error(ide_drive_t *, struct request *, u8, u8);
 818
 819 ide_startstop_t ide_error (ide_drive_t *drive, const char *msg, byte stat);
 820
 821 ide_startstop_t __ide_abort(ide_drive_t *, struct request *);
 822
 823 extern ide_startstop_t ide_abort(ide_drive_t *, const char *);
 824
 825 extern void ide_fix_driveid(struct hd_driveid *);
 826
 827 extern void ide_fixstring(u8 *, const int, const int);
 828
 829 int ide_wait_stat(ide_startstop_t *, ide_drive_t *, u8, u8, unsigned long);
 830
 831 extern ide_startstop_t ide_do_reset (ide_drive_t *);
 832
 833 extern void ide_init_drive_cmd (struct request *rq);
 834
 835 /*
 836  * "action" parameter type for ide_do_drive_cmd() below.
 837  */
 838 typedef enum {
 839         ide_wait,       /* insert rq at end of list, and wait for it */
 840         ide_preempt,    /* insert rq in front of current request */
 841         ide_head_wait,  /* insert rq in front of current request and wait for it */
 842         ide_end         /* insert rq at end of list, but don't wait for it */
 843 } ide_action_t;
 844
 845 extern int ide_do_drive_cmd(ide_drive_t *, struct request *, ide_action_t);
 846
 847 extern void ide_end_drive_cmd(ide_drive_t *, u8, u8);
 848
 849 enum {
 850         IDE_TFLAG_LBA48                 = (1 << 0),
 851         IDE_TFLAG_NO_SELECT_MASK        = (1 << 1),
 852         IDE_TFLAG_FLAGGED               = (1 << 2),
 853         IDE_TFLAG_OUT_DATA              = (1 << 3),
 854         IDE_TFLAG_OUT_HOB_FEATURE       = (1 << 4),
 855         IDE_TFLAG_OUT_HOB_NSECT         = (1 << 5),
 856         IDE_TFLAG_OUT_HOB_LBAL          = (1 << 6),
 857         IDE_TFLAG_OUT_HOB_LBAM          = (1 << 7),
 858         IDE_TFLAG_OUT_HOB_LBAH          = (1 << 8),
 859         IDE_TFLAG_OUT_HOB               = IDE_TFLAG_OUT_HOB_FEATURE |
 860                                           IDE_TFLAG_OUT_HOB_NSECT |
 861                                           IDE_TFLAG_OUT_HOB_LBAL |
 862                                           IDE_TFLAG_OUT_HOB_LBAM |
 863                                           IDE_TFLAG_OUT_HOB_LBAH,
 864         IDE_TFLAG_OUT_FEATURE           = (1 << 9),
 865         IDE_TFLAG_OUT_NSECT             = (1 << 10),
 866         IDE_TFLAG_OUT_LBAL              = (1 << 11),
 867         IDE_TFLAG_OUT_LBAM              = (1 << 12),
 868         IDE_TFLAG_OUT_LBAH              = (1 << 13),
 869         IDE_TFLAG_OUT_TF                = IDE_TFLAG_OUT_FEATURE |
 870                                           IDE_TFLAG_OUT_NSECT |
 871                                           IDE_TFLAG_OUT_LBAL |
 872                                           IDE_TFLAG_OUT_LBAM |
 873                                           IDE_TFLAG_OUT_LBAH,
 874         IDE_TFLAG_OUT_DEVICE            = (1 << 14),
 875         IDE_TFLAG_WRITE                 = (1 << 15),
 876         IDE_TFLAG_FLAGGED_SET_IN_FLAGS  = (1 << 16),
 877         IDE_TFLAG_IN_DATA               = (1 << 17),
 878         IDE_TFLAG_CUSTOM_HANDLER        = (1 << 18),
 879         IDE_TFLAG_DMA_PIO_FALLBACK      = (1 << 19),
 880         IDE_TFLAG_IN_HOB_FEATURE        = (1 << 20),
 881         IDE_TFLAG_IN_HOB_NSECT          = (1 << 21),
 882         IDE_TFLAG_IN_HOB_LBAL           = (1 << 22),
 883         IDE_TFLAG_IN_HOB_LBAM           = (1 << 23),
 884         IDE_TFLAG_IN_HOB_LBAH           = (1 << 24),
 885         IDE_TFLAG_IN_HOB_LBA            = IDE_TFLAG_IN_HOB_LBAL |
 886                                           IDE_TFLAG_IN_HOB_LBAM |
 887                                           IDE_TFLAG_IN_HOB_LBAH,
 888         IDE_TFLAG_IN_HOB                = IDE_TFLAG_IN_HOB_FEATURE |
 889                                           IDE_TFLAG_IN_HOB_NSECT |
 890                                           IDE_TFLAG_IN_HOB_LBA,
 891         IDE_TFLAG_IN_NSECT              = (1 << 25),
 892         IDE_TFLAG_IN_LBAL               = (1 << 26),
 893         IDE_TFLAG_IN_LBAM               = (1 << 27),
 894         IDE_TFLAG_IN_LBAH               = (1 << 28),
 895         IDE_TFLAG_IN_LBA                = IDE_TFLAG_IN_LBAL |
 896                                           IDE_TFLAG_IN_LBAM |
 897                                           IDE_TFLAG_IN_LBAH,
 898         IDE_TFLAG_IN_TF                 = IDE_TFLAG_IN_NSECT |
 899                                           IDE_TFLAG_IN_LBA,
 900         IDE_TFLAG_IN_DEVICE             = (1 << 29),
 901         IDE_TFLAG_HOB                   = IDE_TFLAG_OUT_HOB |
 902                                           IDE_TFLAG_IN_HOB,
 903         IDE_TFLAG_TF                    = IDE_TFLAG_OUT_TF |
 904                                           IDE_TFLAG_IN_TF,
 905         IDE_TFLAG_DEVICE                = IDE_TFLAG_OUT_DEVICE |
 906                                           IDE_TFLAG_IN_DEVICE,
 907         /* force 16-bit I/O operations */
 908         IDE_TFLAG_IO_16BIT              = (1 << 30),
 909         /* ide_task_t was allocated using kmalloc() */
 910         IDE_TFLAG_DYN                   = (1 << 31),
 911 };
 912
 913 struct ide_taskfile {
 914         u8      hob_data;       /*  0: high data byte (for TASKFILE IOCTL) */
 915
 916         u8      hob_feature;    /*  1-5: additional data to support LBA48 */
 917         u8      hob_nsect;
 918         u8      hob_lbal;
 919         u8      hob_lbam;
 920         u8      hob_lbah;
 921
 922         u8      data;           /*  6: low data byte (for TASKFILE IOCTL) */
 923
 924         union {                 /*  7: */
 925                 u8 error;       /*   read:  error */
 926                 u8 feature;     /*  write: feature */
 927         };
 928
 929         u8      nsect;          /*  8: number of sectors */
 930         u8      lbal;           /*  9: LBA low */
 931         u8      lbam;           /* 10: LBA mid */
 932         u8      lbah;           /* 11: LBA high */
 933
 934         u8      device;         /* 12: device select */
 935
 936         union {                 /* 13: */
 937                 u8 status;      /*  read: status  */
 938                 u8 command;     /* write: command */
 939         };
 940 };
 941
 942 typedef struct ide_task_s {
 943         union {
 944                 struct ide_taskfile     tf;
 945                 u8                      tf_array[14];
 946         };
 947         u32                     tf_flags;
 948         int                     data_phase;
 949         struct request          *rq;            /* copy of request */
 950         void                    *special;       /* valid_t generally */
 951 } ide_task_t;
 952
 953 void ide_tf_load(ide_drive_t *, ide_task_t *);
 954 void ide_tf_read(ide_drive_t *, ide_task_t *);
 955
 956 extern void SELECT_DRIVE(ide_drive_t *);
 957 extern void SELECT_MASK(ide_drive_t *, int);
 958
 959 extern int drive_is_ready(ide_drive_t *);
 960
 961 void ide_pktcmd_tf_load(ide_drive_t *, u32, u16, u8);
 962
 963 ide_startstop_t do_rw_taskfile(ide_drive_t *, ide_task_t *);
 964
 965 void task_end_request(ide_drive_t *, struct request *, u8);
 966
 967 int ide_raw_taskfile(ide_drive_t *, ide_task_t *, u8 *, u16);
 968 int ide_no_data_taskfile(ide_drive_t *, ide_task_t *);
 969
 970 int ide_taskfile_ioctl(ide_drive_t *, unsigned int, unsigned long);
 971 int ide_cmd_ioctl(ide_drive_t *, unsigned int, unsigned long);
 972 int ide_task_ioctl(ide_drive_t *, unsigned int, unsigned long);
 973
 974 extern int system_bus_clock(void);
 975
 976 extern int ide_driveid_update(ide_drive_t *);
 977 extern int ide_config_drive_speed(ide_drive_t *, u8);
 978 extern u8 eighty_ninty_three (ide_drive_t *);
 979 extern int taskfile_lib_get_identify(ide_drive_t *drive, u8 *);
 980
 981 extern int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout);
 982
 983 extern void ide_stall_queue(ide_drive_t *drive, unsigned long timeout);
 984
 985 extern int ide_spin_wait_hwgroup(ide_drive_t *);
 986 extern void ide_timer_expiry(unsigned long);
 987 extern irqreturn_t ide_intr(int irq, void *dev_id);
 988 extern void do_ide_request(struct request_queue *);
 989
 990 void ide_init_disk(struct gendisk *, ide_drive_t *);
 991
 992 #ifdef CONFIG_IDEPCI_PCIBUS_ORDER
 993 extern int ide_scan_direction;
 994 extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner, const char *mod_name);
 995 #define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE, KBUILD_MODNAME)
 996 #else
 997 #define ide_pci_register_driver(d) pci_register_driver(d)
 998 #endif
 999
1000 void ide_pci_setup_ports(struct pci_dev *, const struct ide_port_info *, int, u8 *);
1001 void ide_setup_pci_noise(struct pci_dev *, const struct ide_port_info *);
1002
1003 #ifdef CONFIG_BLK_DEV_IDEDMA_PCI
1004 void ide_hwif_setup_dma(ide_hwif_t *, const struct ide_port_info *);
1005 #else
1006 static inline void ide_hwif_setup_dma(ide_hwif_t *hwif,
1007                                       const struct ide_port_info *d) { }
1008 #endif
1009
1010 extern void default_hwif_iops(ide_hwif_t *);
1011 extern void default_hwif_mmiops(ide_hwif_t *);
1012 extern void default_hwif_transport(ide_hwif_t *);
1013
1014 typedef struct ide_pci_enablebit_s {
1015         u8      reg;    /* byte pci reg holding the enable-bit */
1016         u8      mask;   /* mask to isolate the enable-bit */
1017         u8      val;    /* value of masked reg when "enabled" */
1018 } ide_pci_enablebit_t;
1019
1020 enum {
1021         /* Uses ISA control ports not PCI ones. */
1022         IDE_HFLAG_ISA_PORTS             = (1 << 0),
1023         /* single port device */
1024         IDE_HFLAG_SINGLE                = (1 << 1),
1025         /* don't use legacy PIO blacklist */
1026         IDE_HFLAG_PIO_NO_BLACKLIST      = (1 << 2),
1027         /* don't use conservative PIO "downgrade" */
1028         IDE_HFLAG_PIO_NO_DOWNGRADE      = (1 << 3),
1029         /* use PIO8/9 for prefetch off/on */
1030         IDE_HFLAG_ABUSE_PREFETCH        = (1 << 4),
1031         /* use PIO6/7 for fast-devsel off/on */
1032         IDE_HFLAG_ABUSE_FAST_DEVSEL     = (1 << 5),
1033         /* use 100-102 and 200-202 PIO values to set DMA modes */
1034         IDE_HFLAG_ABUSE_DMA_MODES       = (1 << 6),
1035         /*
1036          * keep DMA setting when programming PIO mode, may be used only
1037          * for hosts which have separate PIO and DMA timings (ie. PMAC)
1038          */
1039         IDE_HFLAG_SET_PIO_MODE_KEEP_DMA = (1 << 7),
1040         /* program host for the transfer mode after programming device */
1041         IDE_HFLAG_POST_SET_MODE         = (1 << 8),
1042         /* don't program host/device for the transfer mode ("smart" hosts) */
1043         IDE_HFLAG_NO_SET_MODE           = (1 << 9),
1044         /* trust BIOS for programming chipset/device for DMA */
1045         IDE_HFLAG_TRUST_BIOS_FOR_DMA    = (1 << 10),
1046         /* host uses VDMA (tied with IDE_HFLAG_CS5520 for now) */
1047         IDE_HFLAG_VDMA                  = (1 << 11),
1048         /* ATAPI DMA is unsupported */
1049         IDE_HFLAG_NO_ATAPI_DMA          = (1 << 12),
1050         /* set if host is a "bootable" controller */
1051         IDE_HFLAG_BOOTABLE              = (1 << 13),
1052         /* host doesn't support DMA */
1053         IDE_HFLAG_NO_DMA                = (1 << 14),
1054         /* check if host is PCI IDE device before allowing DMA */
1055         IDE_HFLAG_NO_AUTODMA            = (1 << 15),
1056         /* don't autotune PIO */
1057         IDE_HFLAG_NO_AUTOTUNE           = (1 << 16),
1058         /* host is CS5510/CS5520 */
1059         IDE_HFLAG_CS5520                = IDE_HFLAG_VDMA,
1060         /* no LBA48 */
1061         IDE_HFLAG_NO_LBA48              = (1 << 17),
1062         /* no LBA48 DMA */
1063         IDE_HFLAG_NO_LBA48_DMA          = (1 << 18),
1064         /* data FIFO is cleared by an error */
1065         IDE_HFLAG_ERROR_STOPS_FIFO      = (1 << 19),
1066         /* serialize ports */
1067         IDE_HFLAG_SERIALIZE             = (1 << 20),
1068         /* use legacy IRQs */
1069         IDE_HFLAG_LEGACY_IRQS           = (1 << 21),
1070         /* force use of legacy IRQs */
1071         IDE_HFLAG_FORCE_LEGACY_IRQS     = (1 << 22),
1072         /* limit LBA48 requests to 256 sectors */
1073         IDE_HFLAG_RQSIZE_256            = (1 << 23),
1074         /* use 32-bit I/O ops */
1075         IDE_HFLAG_IO_32BIT              = (1 << 24),
1076         /* unmask IRQs */
1077         IDE_HFLAG_UNMASK_IRQS           = (1 << 25),
1078         IDE_HFLAG_ABUSE_SET_DMA_MODE    = (1 << 26),
1079         /* host is CY82C693 */
1080         IDE_HFLAG_CY82C693              = (1 << 27),
1081         /* force host out of "simplex" mode */
1082         IDE_HFLAG_CLEAR_SIMPLEX         = (1 << 28),
1083         /* DSC overlap is unsupported */
1084         IDE_HFLAG_NO_DSC                = (1 << 29),
1085         /* never use 32-bit I/O ops */
1086         IDE_HFLAG_NO_IO_32BIT           = (1 << 30),
1087         /* never unmask IRQs */
1088         IDE_HFLAG_NO_UNMASK_IRQS        = (1 << 31),
1089 };
1090
1091 #ifdef CONFIG_BLK_DEV_OFFBOARD
1092 # define IDE_HFLAG_OFF_BOARD    IDE_HFLAG_BOOTABLE
1093 #else
1094 # define IDE_HFLAG_OFF_BOARD    0
1095 #endif
1096
1097 struct ide_port_info {
1098         char                    *name;
1099         unsigned int            (*init_chipset)(struct pci_dev *, const char *);
1100         void                    (*init_iops)(ide_hwif_t *);
1101         void                    (*init_hwif)(ide_hwif_t *);
1102         void                    (*init_dma)(ide_hwif_t *, unsigned long);
1103         ide_pci_enablebit_t     enablebits[2];
1104         hwif_chipset_t          chipset;
1105         u8                      extra;
1106         u32                     host_flags;
1107         u8                      pio_mask;
1108         u8                      swdma_mask;
1109         u8                      mwdma_mask;
1110         u8                      udma_mask;
1111 };
1112
1113 int ide_setup_pci_device(struct pci_dev *, const struct ide_port_info *);
1114 int ide_setup_pci_devices(struct pci_dev *, struct pci_dev *, const struct ide_port_info *);
1115
1116 void ide_map_sg(ide_drive_t *, struct request *);
1117 void ide_init_sg_cmd(ide_drive_t *, struct request *);
1118
1119 #define BAD_DMA_DRIVE           0
1120 #define GOOD_DMA_DRIVE          1
1121
1122 struct drive_list_entry {
1123         const char *id_model;
1124         const char *id_firmware;
1125 };
1126
1127 int ide_in_drive_list(struct hd_driveid *, const struct drive_list_entry *);
1128
1129 #ifdef CONFIG_BLK_DEV_IDEDMA
1130 int __ide_dma_bad_drive(ide_drive_t *);
1131 int ide_id_dma_bug(ide_drive_t *);
1132
1133 u8 ide_find_dma_mode(ide_drive_t *, u8);
1134
1135 static inline u8 ide_max_dma_mode(ide_drive_t *drive)
1136 {
1137         return ide_find_dma_mode(drive, XFER_UDMA_6);
1138 }
1139
1140 void ide_dma_off_quietly(ide_drive_t *);
1141 void ide_dma_off(ide_drive_t *);
1142 void ide_dma_on(ide_drive_t *);
1143 int ide_set_dma(ide_drive_t *);
1144 void ide_check_dma_crc(ide_drive_t *);
1145 ide_startstop_t ide_dma_intr(ide_drive_t *);
1146
1147 int ide_build_sglist(ide_drive_t *, struct request *);
1148 void ide_destroy_dmatable(ide_drive_t *);
1149
1150 #ifdef CONFIG_BLK_DEV_IDEDMA_SFF
1151 extern int ide_build_dmatable(ide_drive_t *, struct request *);
1152 extern int ide_release_dma(ide_hwif_t *);
1153 extern void ide_setup_dma(ide_hwif_t *, unsigned long);
1154
1155 void ide_dma_host_set(ide_drive_t *, int);
1156 extern int ide_dma_setup(ide_drive_t *);
1157 extern void ide_dma_start(ide_drive_t *);
1158 extern int __ide_dma_end(ide_drive_t *);
1159 extern void ide_dma_lost_irq(ide_drive_t *);
1160 extern void ide_dma_timeout(ide_drive_t *);
1161 #endif /* CONFIG_BLK_DEV_IDEDMA_SFF */
1162
1163 #else
1164 static inline int ide_id_dma_bug(ide_drive_t *drive) { return 0; }
1165 static inline u8 ide_find_dma_mode(ide_drive_t *drive, u8 speed) { return 0; }
1166 static inline u8 ide_max_dma_mode(ide_drive_t *drive) { return 0; }
1167 static inline void ide_dma_off_quietly(ide_drive_t *drive) { ; }
1168 static inline void ide_dma_off(ide_drive_t *drive) { ; }
1169 static inline void ide_dma_on(ide_drive_t *drive) { ; }
1170 static inline void ide_dma_verbose(ide_drive_t *drive) { ; }
1171 static inline int ide_set_dma(ide_drive_t *drive) { return 1; }
1172 static inline void ide_check_dma_crc(ide_drive_t *drive) { ; }
1173 #endif /* CONFIG_BLK_DEV_IDEDMA */
1174
1175 #ifndef CONFIG_BLK_DEV_IDEDMA_SFF
1176 static inline void ide_release_dma(ide_hwif_t *drive) {;}
1177 #endif
1178
1179 #ifdef CONFIG_BLK_DEV_IDEACPI
1180 extern int ide_acpi_exec_tfs(ide_drive_t *drive);
1181 extern void ide_acpi_get_timing(ide_hwif_t *hwif);
1182 extern void ide_acpi_push_timing(ide_hwif_t *hwif);
1183 extern void ide_acpi_init(ide_hwif_t *hwif);
1184 void ide_acpi_port_init_devices(ide_hwif_t *);
1185 extern void ide_acpi_set_state(ide_hwif_t *hwif, int on);
1186 #else
1187 static inline int ide_acpi_exec_tfs(ide_drive_t *drive) { return 0; }
1188 static inline void ide_acpi_get_timing(ide_hwif_t *hwif) { ; }
1189 static inline void ide_acpi_push_timing(ide_hwif_t *hwif) { ; }
1190 static inline void ide_acpi_init(ide_hwif_t *hwif) { ; }
1191 static inline void ide_acpi_port_init_devices(ide_hwif_t *hwif) { ; }
1192 static inline void ide_acpi_set_state(ide_hwif_t *hwif, int on) {}
1193 #endif
1194
1195 void ide_remove_port_from_hwgroup(ide_hwif_t *);
1196 extern int ide_hwif_request_regions(ide_hwif_t *hwif);
1197 extern void ide_hwif_release_regions(ide_hwif_t* hwif);
1198 void ide_unregister(unsigned int, int, int);
1199
1200 void ide_register_region(struct gendisk *);
1201 void ide_unregister_region(struct gendisk *);
1202
1203 void ide_undecoded_slave(ide_drive_t *);
1204
1205 int ide_device_add_all(u8 *idx, const struct ide_port_info *);
1206 int ide_device_add(u8 idx[4], const struct ide_port_info *);
1207
1208 static inline void *ide_get_hwifdata (ide_hwif_t * hwif)
1209 {
1210         return hwif->hwif_data;
1211 }
1212
1213 static inline void ide_set_hwifdata (ide_hwif_t * hwif, void *data)
1214 {
1215         hwif->hwif_data = data;
1216 }
1217
1218 const char *ide_xfer_verbose(u8 mode);
1219 extern void ide_toggle_bounce(ide_drive_t *drive, int on);
1220 extern int ide_set_xfer_rate(ide_drive_t *drive, u8 rate);
1221
1222 static inline int ide_dev_has_iordy(struct hd_driveid *id)
1223 {
1224         return ((id->field_valid & 2) && (id->capability & 8)) ? 1 : 0;
1225 }
1226
1227 static inline int ide_dev_is_sata(struct hd_driveid *id)
1228 {
1229         /*
1230          * See if word 93 is 0 AND drive is at least ATA-5 compatible
1231          * verifying that word 80 by casting it to a signed type --
1232          * this trick allows us to filter out the reserved values of
1233          * 0x0000 and 0xffff along with the earlier ATA revisions...
1234          */
1235         if (id->hw_config == 0 && (short)id->major_rev_num >= 0x0020)
1236                 return 1;
1237         return 0;
1238 }
1239
1240 u64 ide_get_lba_addr(struct ide_taskfile *, int);
1241 u8 ide_dump_status(ide_drive_t *, const char *, u8);
1242
1243 typedef struct ide_pio_timings_s {
1244         int     setup_time;     /* Address setup (ns) minimum */
1245         int     active_time;    /* Active pulse (ns) minimum */
1246         int     cycle_time;     /* Cycle time (ns) minimum = */
1247                                 /* active + recovery (+ setup for some chips) */
1248 } ide_pio_timings_t;
1249
1250 unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
1251 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
1252 extern const ide_pio_timings_t ide_pio_timings[6];
1253
1254 int ide_set_pio_mode(ide_drive_t *, u8);
1255 int ide_set_dma_mode(ide_drive_t *, u8);
1256
1257 void ide_set_pio(ide_drive_t *, u8);
1258
1259 static inline void ide_set_max_pio(ide_drive_t *drive)
1260 {
1261         ide_set_pio(drive, 255);
1262 }
1263
1264 extern spinlock_t ide_lock;
1265 extern struct mutex ide_cfg_mtx;
1266 /*
1267  * Structure locking:
1268  *
1269  * ide_cfg_mtx and ide_lock together protect changes to
1270  * ide_hwif_t->{next,hwgroup}
1271  * ide_drive_t->next
1272  *
1273  * ide_hwgroup_t->busy: ide_lock
1274  * ide_hwgroup_t->hwif: ide_lock
1275  * ide_hwif_t->mate: constant, no locking
1276  * ide_drive_t->hwif: constant, no locking
1277  */
1278
1279 #define local_irq_set(flags)    do { local_save_flags((flags)); local_irq_enable_in_hardirq(); } while (0)
1280
1281 extern struct bus_type ide_bus_type;
1282
1283 /* check if CACHE FLUSH (EXT) command is supported (bits defined in ATA-6) */
1284 #define ide_id_has_flush_cache(id)      ((id)->cfs_enable_2 & 0x3000)
1285
1286 /* some Maxtor disks have bit 13 defined incorrectly so check bit 10 too */
1287 #define ide_id_has_flush_cache_ext(id)  \
1288         (((id)->cfs_enable_2 & 0x2400) == 0x2400)
1289
1290 static inline void ide_dump_identify(u8 *id)
1291 {
1292         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 2, id, 512, 0);
1293 }
1294
1295 static inline int hwif_to_node(ide_hwif_t *hwif)
1296 {
1297         struct pci_dev *dev = to_pci_dev(hwif->dev);
1298         return hwif->dev ? pcibus_to_node(dev->bus) : -1;
1299 }
1300
1301 static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
1302 {
1303         ide_hwif_t *hwif        = HWIF(drive);
1304
1305         return &hwif->drives[(drive->dn ^ 1) & 1];
1306 }
1307
1308 static inline void ide_set_irq(ide_drive_t *drive, int on)
1309 {
1310         drive->hwif->OUTB(drive->ctl | (on ? 0 : 2), IDE_CONTROL_REG);
1311 }
1312
1313 static inline u8 ide_read_status(ide_drive_t *drive)
1314 {
1315         ide_hwif_t *hwif = drive->hwif;
1316
1317         return hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
1318 }
1319
1320 static inline u8 ide_read_altstatus(ide_drive_t *drive)
1321 {
1322         ide_hwif_t *hwif = drive->hwif;
1323
1324         return hwif->INB(hwif->io_ports[IDE_CONTROL_OFFSET]);
1325 }
1326
1327 static inline u8 ide_read_error(ide_drive_t *drive)
1328 {
1329         ide_hwif_t *hwif = drive->hwif;
1330
1331         return hwif->INB(hwif->io_ports[IDE_ERROR_OFFSET]);
1332 }
1333
1334 #endif /* _IDE_H */