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1.1 ! root 1: /* ! 2: * linux/drivers/block/ide.h ! 3: * ! 4: * Copyright (C) 1994, 1995 Linus Torvalds & authors ! 5: */ ! 6: ! 7: #include <linux/config.h> ! 8: ! 9: /* ! 10: * This is the multiple IDE interface driver, as evolved from hd.c. ! 11: * It supports up to four IDE interfaces, on one or more IRQs (usually 14 & 15). ! 12: * There can be up to two drives per interface, as per the ATA-2 spec. ! 13: * ! 14: * Primary i/f: ide0: major=3; (hda) minor=0; (hdb) minor=64 ! 15: * Secondary i/f: ide1: major=22; (hdc or hd1a) minor=0; (hdd or hd1b) minor=64 ! 16: * Tertiary i/f: ide2: major=33; (hde) minor=0; (hdf) minor=64 ! 17: * Quaternary i/f: ide3: major=34; (hdg) minor=0; (hdh) minor=64 ! 18: */ ! 19: ! 20: /****************************************************************************** ! 21: * IDE driver configuration options (play with these as desired): ! 22: * ! 23: * REALLY_SLOW_IO can be defined in ide.c and ide-cd.c, if necessary ! 24: */ ! 25: #undef REALLY_FAST_IO /* define if ide ports are perfect */ ! 26: #define INITIAL_MULT_COUNT 0 /* off=0; on=2,4,8,16,32, etc.. */ ! 27: ! 28: #ifndef SUPPORT_SLOW_DATA_PORTS /* 1 to support slow data ports */ ! 29: #define SUPPORT_SLOW_DATA_PORTS 1 /* 0 to reduce kernel size */ ! 30: #endif ! 31: #ifndef SUPPORT_VLB_SYNC /* 1 to support weird 32-bit chips */ ! 32: #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */ ! 33: #endif ! 34: #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */ ! 35: #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */ ! 36: #endif ! 37: #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */ ! 38: #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */ ! 39: #endif ! 40: #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */ ! 41: #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */ ! 42: #endif ! 43: #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */ ! 44: #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */ ! 45: #endif ! 46: ! 47: #ifdef CONFIG_BLK_DEV_CMD640 ! 48: #if 0 /* change to 1 when debugging cmd640 problems */ ! 49: void cmd640_dump_regs (void); ! 50: #define CMD640_DUMP_REGS cmd640_dump_regs() /* for debugging cmd640 chipset */ ! 51: #endif ! 52: #endif /* CONFIG_BLK_DEV_CMD640 */ ! 53: ! 54: #if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE) || \ ! 55: defined(CONFIG_BLK_DEV_IDEFLOPPY) || defined(CONFIG_BLK_DEV_IDESCSI) ! 56: #define CONFIG_BLK_DEV_IDEATAPI 1 ! 57: #endif ! 58: ! 59: /* ! 60: * IDE_DRIVE_CMD is used to implement many features of the hdparm utility ! 61: */ ! 62: #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/ ! 63: ! 64: /* ! 65: * "No user-serviceable parts" beyond this point :) ! 66: *****************************************************************************/ ! 67: ! 68: #if defined(CONFIG_BLK_DEV_IDESCSI) && !defined(CONFIG_SCSI) ! 69: #error "SCSI must also be selected" ! 70: #endif ! 71: ! 72: typedef unsigned char byte; /* used everywhere */ ! 73: ! 74: /* ! 75: * Probably not wise to fiddle with these ! 76: */ ! 77: #define ERROR_MAX 8 /* Max read/write errors per sector */ ! 78: #define ERROR_RESET 3 /* Reset controller every 4th retry */ ! 79: #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ ! 80: ! 81: /* ! 82: * Ensure that various configuration flags have compatible settings ! 83: */ ! 84: #ifdef REALLY_SLOW_IO ! 85: #undef REALLY_FAST_IO ! 86: #endif ! 87: ! 88: /* ! 89: * Definitions for accessing IDE controller registers ! 90: */ ! 91: ! 92: #define HWIF(drive) ((ide_hwif_t *)((drive)->hwif)) ! 93: #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup)) ! 94: ! 95: #define IDE_DATA_OFFSET (0) ! 96: #define IDE_ERROR_OFFSET (1) ! 97: #define IDE_NSECTOR_OFFSET (2) ! 98: #define IDE_SECTOR_OFFSET (3) ! 99: #define IDE_LCYL_OFFSET (4) ! 100: #define IDE_HCYL_OFFSET (5) ! 101: #define IDE_SELECT_OFFSET (6) ! 102: #define IDE_STATUS_OFFSET (7) ! 103: #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET ! 104: #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET ! 105: ! 106: #define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET) ! 107: #define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET) ! 108: #define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET) ! 109: #define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET) ! 110: #define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET) ! 111: #define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET) ! 112: #define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET) ! 113: #define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET) ! 114: #define IDE_CONTROL_REG (HWIF(drive)->ctl_port) ! 115: #define IDE_FEATURE_REG IDE_ERROR_REG ! 116: #define IDE_COMMAND_REG IDE_STATUS_REG ! 117: #define IDE_ALTSTATUS_REG IDE_CONTROL_REG ! 118: #define IDE_IREASON_REG IDE_NSECTOR_REG ! 119: #define IDE_BCOUNTL_REG IDE_LCYL_REG ! 120: #define IDE_BCOUNTH_REG IDE_HCYL_REG ! 121: ! 122: #ifdef REALLY_FAST_IO ! 123: #define OUT_BYTE(b,p) outb((b),(p)) ! 124: #define IN_BYTE(p) (byte)inb(p) ! 125: #else ! 126: #define OUT_BYTE(b,p) outb_p((b),(p)) ! 127: #define IN_BYTE(p) (byte)inb_p(p) ! 128: #endif /* REALLY_FAST_IO */ ! 129: ! 130: #define GET_ERR() IN_BYTE(IDE_ERROR_REG) ! 131: #define GET_STAT() IN_BYTE(IDE_STATUS_REG) ! 132: #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good)) ! 133: #define BAD_R_STAT (BUSY_STAT | ERR_STAT) ! 134: #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT) ! 135: #define BAD_STAT (BAD_R_STAT | DRQ_STAT) ! 136: #define DRIVE_READY (READY_STAT | SEEK_STAT) ! 137: #define DATA_READY (DRQ_STAT) ! 138: ! 139: /* ! 140: * Some more useful definitions ! 141: */ ! 142: #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */ ! 143: #define MAJOR_NAME IDE_MAJOR_NAME ! 144: #define PARTN_BITS 6 /* number of minor dev bits for partitions */ ! 145: #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */ ! 146: #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */ ! 147: #ifndef MAX_HWIFS ! 148: #define MAX_HWIFS 4 /* an arbitrary, but realistic limit */ ! 149: #endif ! 150: #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */ ! 151: ! 152: /* ! 153: * Timeouts for various operations: ! 154: */ ! 155: #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */ ! 156: #ifdef CONFIG_APM ! 157: #define WAIT_READY (5*HZ) /* 5sec - some laptops are very slow */ ! 158: #else ! 159: #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */ ! 160: #endif /* CONFIG_APM */ ! 161: #define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */ ! 162: #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */ ! 163: #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */ ! 164: ! 165: #if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE) ! 166: #define SELECT_DRIVE(hwif,drive) \ ! 167: { \ ! 168: if (hwif->selectproc) \ ! 169: hwif->selectproc(drive); \ ! 170: else \ ! 171: OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); \ ! 172: } ! 173: #else ! 174: #define SELECT_DRIVE(hwif,drive) OUT_BYTE((drive)->select.all, hwif->io_base+IDE_SELECT_OFFSET); ! 175: #endif /* CONFIG_BLK_DEV_HT6560B || CONFIG_BLK_DEV_PROMISE */ ! 176: ! 177: #ifdef CONFIG_BLK_DEV_IDETAPE ! 178: #include "ide-tape.h" ! 179: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 180: ! 181: #ifdef CONFIG_BLK_DEV_IDECD ! 182: ! 183: struct atapi_request_sense { ! 184: unsigned char error_code : 7; ! 185: unsigned char valid : 1; ! 186: byte reserved1; ! 187: unsigned char sense_key : 4; ! 188: unsigned char reserved2 : 1; ! 189: unsigned char ili : 1; ! 190: unsigned char reserved3 : 2; ! 191: byte info[4]; ! 192: byte sense_len; ! 193: byte command_info[4]; ! 194: byte asc; ! 195: byte ascq; ! 196: byte fru; ! 197: byte sense_key_specific[3]; ! 198: }; ! 199: ! 200: struct packet_command { ! 201: char *buffer; ! 202: int buflen; ! 203: int stat; ! 204: struct atapi_request_sense *sense_data; ! 205: unsigned char c[12]; ! 206: }; ! 207: ! 208: ! 209: /* Structure of a MSF cdrom address. */ ! 210: struct atapi_msf { ! 211: byte reserved; ! 212: byte minute; ! 213: byte second; ! 214: byte frame; ! 215: }; ! 216: ! 217: ! 218: /* Space to hold the disk TOC. */ ! 219: ! 220: #define MAX_TRACKS 99 ! 221: struct atapi_toc_header { ! 222: unsigned short toc_length; ! 223: byte first_track; ! 224: byte last_track; ! 225: }; ! 226: ! 227: struct atapi_toc_entry { ! 228: byte reserved1; ! 229: unsigned control : 4; ! 230: unsigned adr : 4; ! 231: byte track; ! 232: byte reserved2; ! 233: union { ! 234: unsigned lba; ! 235: struct atapi_msf msf; ! 236: } addr; ! 237: }; ! 238: ! 239: struct atapi_toc { ! 240: int last_session_lba; ! 241: int xa_flag; ! 242: unsigned capacity; ! 243: struct atapi_toc_header hdr; ! 244: struct atapi_toc_entry ent[MAX_TRACKS+1]; ! 245: /* One extra for the leadout. */ ! 246: }; ! 247: ! 248: ! 249: /* This structure is annoyingly close to, but not identical with, ! 250: the cdrom_subchnl structure from cdrom.h. */ ! 251: struct atapi_cdrom_subchnl ! 252: { ! 253: u_char acdsc_reserved; ! 254: u_char acdsc_audiostatus; ! 255: u_short acdsc_length; ! 256: u_char acdsc_format; ! 257: ! 258: u_char acdsc_adr: 4; ! 259: u_char acdsc_ctrl: 4; ! 260: u_char acdsc_trk; ! 261: u_char acdsc_ind; ! 262: union { ! 263: struct atapi_msf msf; ! 264: int lba; ! 265: } acdsc_absaddr; ! 266: union { ! 267: struct atapi_msf msf; ! 268: int lba; ! 269: } acdsc_reladdr; ! 270: }; ! 271: ! 272: ! 273: /* Extra per-device info for cdrom drives. */ ! 274: struct cdrom_info { ! 275: ! 276: /* Buffer for table of contents. NULL if we haven't allocated ! 277: a TOC buffer for this device yet. */ ! 278: ! 279: struct atapi_toc *toc; ! 280: ! 281: /* Sector buffer. If a read request wants only the first part ! 282: of a cdrom block, we cache the rest of the block here, ! 283: in the expectation that that data is going to be wanted soon. ! 284: SECTOR_BUFFERED is the number of the first buffered sector, ! 285: and NSECTORS_BUFFERED is the number of sectors in the buffer. ! 286: Before the buffer is allocated, we should have ! 287: SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */ ! 288: ! 289: unsigned long sector_buffered; ! 290: unsigned long nsectors_buffered; ! 291: char *sector_buffer; ! 292: ! 293: /* The result of the last successful request sense command ! 294: on this device. */ ! 295: struct atapi_request_sense sense_data; ! 296: ! 297: int max_sectors; ! 298: }; ! 299: ! 300: #endif /* CONFIG_BLK_DEV_IDECD */ ! 301: ! 302: /* ! 303: * Now for the data we need to maintain per-drive: ide_drive_t ! 304: */ ! 305: ! 306: typedef enum {ide_disk, ide_cdrom, ide_tape, ide_floppy, ide_scsi} ide_media_t; ! 307: ! 308: typedef union { ! 309: unsigned all : 8; /* all of the bits together */ ! 310: struct { ! 311: unsigned set_geometry : 1; /* respecify drive geometry */ ! 312: unsigned recalibrate : 1; /* seek to cyl 0 */ ! 313: unsigned set_multmode : 1; /* set multmode count */ ! 314: unsigned set_tune : 1; /* tune interface for drive */ ! 315: unsigned mc : 1; /* acknowledge media change */ ! 316: unsigned reserved : 3; /* unused */ ! 317: } b; ! 318: } special_t; ! 319: ! 320: typedef union { ! 321: unsigned all : 8; /* all of the bits together */ ! 322: struct { ! 323: unsigned head : 4; /* always zeros here */ ! 324: unsigned unit : 1; /* drive select number, 0 or 1 */ ! 325: unsigned bit5 : 1; /* always 1 */ ! 326: unsigned lba : 1; /* using LBA instead of CHS */ ! 327: unsigned bit7 : 1; /* always 1 */ ! 328: } b; ! 329: } select_t; ! 330: ! 331: typedef struct ide_drive_s { ! 332: special_t special; /* special action flags */ ! 333: unsigned present : 1; /* drive is physically present */ ! 334: unsigned noprobe : 1; /* from: hdx=noprobe */ ! 335: unsigned keep_settings : 1; /* restore settings after drive reset */ ! 336: unsigned busy : 1; /* currently doing revalidate_disk() */ ! 337: unsigned removable : 1; /* 1 if need to do check_media_change */ ! 338: unsigned using_dma : 1; /* disk is using dma for read/write */ ! 339: unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */ ! 340: unsigned unmask : 1; /* flag: okay to unmask other irqs */ ! 341: unsigned no_unmask : 1; /* disallow setting unmask bit */ ! 342: unsigned no_io_32bit : 1; /* disallow enabling 32bit I/O */ ! 343: unsigned nobios : 1; /* flag: do not probe bios for drive */ ! 344: unsigned slow : 1; /* flag: slow data port */ ! 345: unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */ ! 346: #if FAKE_FDISK_FOR_EZDRIVE ! 347: unsigned remap_0_to_1 : 1; /* flag: partitioned with ezdrive */ ! 348: #endif /* FAKE_FDISK_FOR_EZDRIVE */ ! 349: unsigned no_geom : 1; /* flag: do not set geometry */ ! 350: ide_media_t media; /* disk, cdrom, tape, floppy */ ! 351: select_t select; /* basic drive/head select reg value */ ! 352: byte ctl; /* "normal" value for IDE_CONTROL_REG */ ! 353: byte ready_stat; /* min status value for drive ready */ ! 354: byte mult_count; /* current multiple sector setting */ ! 355: byte mult_req; /* requested multiple sector setting */ ! 356: byte tune_req; /* requested drive tuning setting */ ! 357: byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ ! 358: byte bad_wstat; /* used for ignoring WRERR_STAT */ ! 359: byte sect0; /* offset of first sector for DM6:DDO */ ! 360: byte usage; /* current "open()" count for drive */ ! 361: byte head; /* "real" number of heads */ ! 362: byte sect; /* "real" sectors per track */ ! 363: byte bios_head; /* BIOS/fdisk/LILO number of heads */ ! 364: byte bios_sect; /* BIOS/fdisk/LILO sectors per track */ ! 365: unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */ ! 366: unsigned short cyl; /* "real" number of cyls */ ! 367: void *hwif; /* actually (ide_hwif_t *) */ ! 368: struct wait_queue *wqueue; /* used to wait for drive in open() */ ! 369: struct hd_driveid *id; /* drive model identification info */ ! 370: struct hd_struct *part; /* drive partition table */ ! 371: char name[4]; /* drive name, such as "hda" */ ! 372: #ifdef CONFIG_BLK_DEV_IDECD ! 373: struct cdrom_info cdrom_info; /* for ide-cd.c */ ! 374: #endif /* CONFIG_BLK_DEV_IDECD */ ! 375: #ifdef CONFIG_BLK_DEV_IDETAPE ! 376: idetape_tape_t tape; /* for ide-tape.c */ ! 377: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 378: #ifdef CONFIG_BLK_DEV_IDEFLOPPY ! 379: void *floppy; /* for ide-floppy.c */ ! 380: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ ! 381: #ifdef CONFIG_BLK_DEV_IDESCSI ! 382: void *scsi; /* for ide-scsi.c */ ! 383: #endif /* CONFIG_BLK_DEV_IDESCSI */ ! 384: byte ide_scsi; /* use ide-scsi driver */ ! 385: } ide_drive_t; ! 386: ! 387: /* ! 388: * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive. ! 389: * ! 390: * The caller is assumed to have selected the drive and programmed the drive's ! 391: * sector address using CHS or LBA. All that remains is to prepare for DMA ! 392: * and then issue the actual read/write DMA/PIO command to the drive. ! 393: * ! 394: * Returns 0 if all went well. ! 395: * Returns 1 if DMA read/write could not be started, in which case the caller ! 396: * should either try again later, or revert to PIO for the current request. ! 397: */ ! 398: typedef enum { ide_dma_read = 0, ide_dma_write = 1, ! 399: ide_dma_abort = 2, ide_dma_check = 3, ! 400: ide_dma_status_bad = 4, ide_dma_transferred = 5, ! 401: ide_dma_begin = 6 } ! 402: ide_dma_action_t; ! 403: ! 404: typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *); ! 405: ! 406: ! 407: /* ! 408: * An ide_tuneproc_t() is used to set the speed of an IDE interface ! 409: * to a particular PIO mode. The "byte" parameter is used ! 410: * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255 ! 411: * indicates that the interface driver should "auto-tune" the PIO mode ! 412: * according to the drive capabilities in drive->id; ! 413: * ! 414: * Not all interface types support tuning, and not all of those ! 415: * support all possible PIO settings. They may silently ignore ! 416: * or round values as they see fit. ! 417: */ ! 418: typedef void (ide_tuneproc_t)(ide_drive_t *, byte); ! 419: ! 420: /* ! 421: * This is used to provide HT6560B & PROMISE interface support. ! 422: */ ! 423: typedef void (ide_selectproc_t) (ide_drive_t *); ! 424: ! 425: /* ! 426: * hwif_chipset_t is used to keep track of the specific hardware ! 427: * chipset used by each IDE interface, if known. ! 428: */ ! 429: typedef enum { ide_unknown, ide_generic, ide_triton, ! 430: ide_cmd640, ide_dtc2278, ide_ali14xx, ! 431: ide_qd6580, ide_umc8672, ide_ht6560b, ! 432: ide_promise, ide_promise_udma } ! 433: hwif_chipset_t; ! 434: ! 435: typedef struct hwif_s { ! 436: struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ ! 437: void *hwgroup; /* actually (ide_hwgroup_t *) */ ! 438: unsigned short io_base; /* base io port addr */ ! 439: unsigned short ctl_port; /* usually io_base+0x206 */ ! 440: ide_drive_t drives[MAX_DRIVES]; /* drive info */ ! 441: struct gendisk *gd; /* gendisk structure */ ! 442: ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */ ! 443: #if defined(CONFIG_BLK_DEV_HT6560B) || defined(CONFIG_BLK_DEV_PROMISE) ! 444: ide_selectproc_t *selectproc; /* tweaks hardware to select drive */ ! 445: #endif ! 446: ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */ ! 447: unsigned long *dmatable; /* dma physical region descriptor table */ ! 448: unsigned short dma_base; /* base addr for dma ports (triton) */ ! 449: byte irq; /* our irq number */ ! 450: byte major; /* our major number */ ! 451: char name[5]; /* name of interface, eg. "ide0" */ ! 452: byte index; /* 0 for ide0; 1 for ide1; ... */ ! 453: hwif_chipset_t chipset; /* sub-module for tuning.. */ ! 454: unsigned noprobe : 1; /* don't probe for this interface */ ! 455: unsigned present : 1; /* this interface exists */ ! 456: unsigned serialized : 1; /* serialized operation with mate hwif */ ! 457: unsigned sharing_irq: 1; /* 1 = sharing irq with another hwif */ ! 458: #ifdef CONFIG_BLK_DEV_PROMISE ! 459: unsigned is_promise2: 1; /* 2nd i/f on promise DC4030 */ ! 460: #endif /* CONFIG_BLK_DEV_PROMISE */ ! 461: #if (DISK_RECOVERY_TIME > 0) ! 462: unsigned long last_time; /* time when previous rq was done */ ! 463: #endif ! 464: #ifdef CONFIG_BLK_DEV_IDECD ! 465: struct request request_sense_request; /* from ide-cd.c */ ! 466: struct packet_command request_sense_pc; /* from ide-cd.c */ ! 467: #endif /* CONFIG_BLK_DEV_IDECD */ ! 468: #ifdef CONFIG_BLK_DEV_IDETAPE ! 469: ide_drive_t *tape_drive; /* Pointer to the tape on this interface */ ! 470: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 471: } ide_hwif_t; ! 472: ! 473: /* ! 474: * internal ide interrupt handler type ! 475: */ ! 476: typedef void (ide_handler_t)(ide_drive_t *); ! 477: ! 478: typedef struct hwgroup_s { ! 479: ide_handler_t *handler;/* irq handler, if active */ ! 480: ide_drive_t *drive; /* current drive */ ! 481: ide_hwif_t *hwif; /* ptr to current hwif in linked-list */ ! 482: ide_hwif_t *next_hwif; /* next selected hwif (for tape) */ ! 483: struct request *rq; /* current request */ ! 484: struct timer_list timer; /* failsafe timer */ ! 485: struct request wrq; /* local copy of current write rq */ ! 486: unsigned long poll_timeout; /* timeout value during long polls */ ! 487: int active; /* set when servicing requests */ ! 488: } ide_hwgroup_t; ! 489: ! 490: /* ! 491: * ide_hwifs[] is the master data structure used to keep track ! 492: * of just about everything in ide.c. Whenever possible, routines ! 493: * should be using pointers to a drive (ide_drive_t *) or ! 494: * pointers to a hwif (ide_hwif_t *), rather than indexing this ! 495: * structure directly (the allocation/layout may change!). ! 496: * ! 497: */ ! 498: #ifndef _IDE_C ! 499: extern ide_hwif_t ide_hwifs[]; /* master data repository */ ! 500: #endif ! 501: ! 502: /* ! 503: * One final include file, which references some of the data/defns from above ! 504: */ ! 505: #define IDE_DRIVER /* "parameter" for blk.h */ ! 506: #include <linux/blk.h> ! 507: ! 508: #if (DISK_RECOVERY_TIME > 0) ! 509: void ide_set_recovery_timer (ide_hwif_t *); ! 510: #define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive) ! 511: #else ! 512: #define SET_RECOVERY_TIMER(drive) ! 513: #endif ! 514: ! 515: /* ! 516: * This is used for (nearly) all data transfers from the IDE interface ! 517: */ ! 518: void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount); ! 519: ! 520: /* ! 521: * This is used for (nearly) all data transfers to the IDE interface ! 522: */ ! 523: void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount); ! 524: ! 525: /* ! 526: * This is used for (nearly) all ATAPI data transfers from/to the IDE interface ! 527: */ ! 528: void atapi_input_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount); ! 529: void atapi_output_bytes (ide_drive_t *drive, void *buffer, unsigned int bytecount); ! 530: ! 531: /* ! 532: * This is used on exit from the driver, to designate the next irq handler ! 533: * and also to start the safety timer. ! 534: */ ! 535: void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout); ! 536: ! 537: /* ! 538: * Error reporting, in human readable form (luxurious, but a memory hog). ! 539: */ ! 540: byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat); ! 541: ! 542: /* ! 543: * ide_error() takes action based on the error returned by the controller. ! 544: * The calling function must return afterwards, to restart the request. ! 545: */ ! 546: void ide_error (ide_drive_t *drive, const char *msg, byte stat); ! 547: ! 548: /* ! 549: * ide_fixstring() cleans up and (optionally) byte-swaps a text string, ! 550: * removing leading/trailing blanks and compressing internal blanks. ! 551: * It is primarily used to tidy up the model name/number fields as ! 552: * returned by the WIN_[P]IDENTIFY commands. ! 553: */ ! 554: void ide_fixstring (byte *s, const int bytecount, const int byteswap); ! 555: ! 556: /* ! 557: * This routine busy-waits for the drive status to be not "busy". ! 558: * It then checks the status for all of the "good" bits and none ! 559: * of the "bad" bits, and if all is okay it returns 0. All other ! 560: * cases return 1 after invoking ide_error() -- caller should return. ! 561: * ! 562: */ ! 563: int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout); ! 564: ! 565: /* ! 566: * This routine is called from the partition-table code in genhd.c ! 567: * to "convert" a drive to a logical geometry with fewer than 1024 cyls. ! 568: * ! 569: * The second parameter, "xparm", determines exactly how the translation ! 570: * will be handled: ! 571: * 0 = convert to CHS with fewer than 1024 cyls ! 572: * using the same method as Ontrack DiskManager. ! 573: * 1 = same as "0", plus offset everything by 63 sectors. ! 574: * -1 = similar to "0", plus redirect sector 0 to sector 1. ! 575: * >1 = convert to a CHS geometry with "xparm" heads. ! 576: * ! 577: * Returns 0 if the translation was not possible, if the device was not ! 578: * an IDE disk drive, or if a geometry was "forced" on the commandline. ! 579: * Returns 1 if the geometry translation was successful. ! 580: */ ! 581: int ide_xlate_1024 (kdev_t, int, const char *); ! 582: ! 583: /* ! 584: * Start a reset operation for an IDE interface. ! 585: * The caller should return immediately after invoking this. ! 586: */ ! 587: void ide_do_reset (ide_drive_t *); ! 588: ! 589: /* ! 590: * This function is intended to be used prior to invoking ide_do_drive_cmd(). ! 591: */ ! 592: void ide_init_drive_cmd (struct request *rq); ! 593: ! 594: /* ! 595: * "action" parameter type for ide_do_drive_cmd() below. ! 596: */ ! 597: typedef enum ! 598: {ide_wait, /* insert rq at end of list, and wait for it */ ! 599: ide_next, /* insert rq immediately after current request */ ! 600: ide_preempt, /* insert rq in front of current request */ ! 601: ide_end} /* insert rq at end of list, but don't wait for it */ ! 602: ide_action_t; ! 603: ! 604: /* ! 605: * This function issues a special IDE device request ! 606: * onto the request queue. ! 607: * ! 608: * If action is ide_wait, then the rq is queued at the end of the ! 609: * request queue, and the function sleeps until it has been processed. ! 610: * This is for use when invoked from an ioctl handler. ! 611: * ! 612: * If action is ide_preempt, then the rq is queued at the head of ! 613: * the request queue, displacing the currently-being-processed ! 614: * request and this function returns immediately without waiting ! 615: * for the new rq to be completed. This is VERY DANGEROUS, and is ! 616: * intended for careful use by the ATAPI tape/cdrom driver code. ! 617: * ! 618: * If action is ide_next, then the rq is queued immediately after ! 619: * the currently-being-processed-request (if any), and the function ! 620: * returns without waiting for the new rq to be completed. As above, ! 621: * This is VERY DANGEROUS, and is intended for careful use by the ! 622: * ATAPI tape/cdrom driver code. ! 623: * ! 624: * If action is ide_end, then the rq is queued at the end of the ! 625: * request queue, and the function returns immediately without waiting ! 626: * for the new rq to be completed. This is again intended for careful ! 627: * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c, ! 628: * when operating in the pipelined operation mode). ! 629: */ ! 630: int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action); ! 631: ! 632: /* ! 633: * Clean up after success/failure of an explicit drive cmd. ! 634: * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD). ! 635: */ ! 636: void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err); ! 637: ! 638: /* ! 639: * ide_system_bus_speed() returns what we think is the system VESA/PCI ! 640: * bus speed (in Mhz). This is used for calculating interface PIO timings. ! 641: * The default is 40 for known PCI systems, 50 otherwise. ! 642: * The "idebus=xx" parameter can be used to override this value. ! 643: */ ! 644: int ide_system_bus_speed (void); ! 645: ! 646: /* ! 647: * ide_multwrite() transfers a block of up to mcount sectors of data ! 648: * to a drive as part of a disk multwrite operation. ! 649: */ ! 650: void ide_multwrite (ide_drive_t *drive, unsigned int mcount); ! 651: ! 652: #ifdef CONFIG_BLK_DEV_IDECD ! 653: /* ! 654: * These are routines in ide-cd.c invoked from ide.c ! 655: */ ! 656: void ide_do_rw_cdrom (ide_drive_t *, unsigned long); ! 657: int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long); ! 658: int ide_cdrom_check_media_change (ide_drive_t *); ! 659: int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *); ! 660: void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *); ! 661: void ide_cdrom_setup (ide_drive_t *); ! 662: #endif /* CONFIG_BLK_DEV_IDECD */ ! 663: ! 664: #ifdef CONFIG_BLK_DEV_IDETAPE ! 665: ! 666: /* ! 667: * Functions in ide-tape.c which are invoked from ide.c: ! 668: */ ! 669: ! 670: /* ! 671: * idetape_identify_device is called during device probing stage to ! 672: * probe for an ide atapi tape drive and to initialize global variables ! 673: * in ide-tape.c which provide the link between the character device ! 674: * and the corresponding block device. ! 675: * ! 676: * Returns 1 if an ide tape was detected and is supported. ! 677: * Returns 0 otherwise. ! 678: */ ! 679: ! 680: int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id); ! 681: ! 682: /* ! 683: * idetape_setup is called a bit later than idetape_identify_device, ! 684: * during the search for disk partitions, to initialize various tape ! 685: * state variables in ide_drive_t *drive. ! 686: */ ! 687: ! 688: void idetape_setup (ide_drive_t *drive); ! 689: ! 690: /* ! 691: * idetape_do_request is our request function. It is called by ide.c ! 692: * to process a new request. ! 693: */ ! 694: ! 695: void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); ! 696: ! 697: /* ! 698: * idetape_end_request is used to finish servicing a request, and to ! 699: * insert a pending pipeline request into the main device queue. ! 700: */ ! 701: ! 702: void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup); ! 703: ! 704: /* ! 705: * Block device interface functions. ! 706: */ ! 707: ! 708: int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, ! 709: unsigned int cmd, unsigned long arg); ! 710: int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 711: void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 712: ! 713: /* ! 714: * idetape_register_chrdev initializes the character device interface to ! 715: * the ide tape drive. ! 716: */ ! 717: ! 718: void idetape_register_chrdev (void); ! 719: ! 720: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 721: ! 722: #ifdef CONFIG_BLK_DEV_IDEFLOPPY ! 723: int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id); ! 724: void idefloppy_setup (ide_drive_t *drive); ! 725: void idefloppy_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); ! 726: void idefloppy_end_request (byte uptodate, ide_hwgroup_t *hwgroup); ! 727: int idefloppy_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, ! 728: unsigned int cmd, unsigned long arg); ! 729: int idefloppy_open (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 730: void idefloppy_release (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 731: int idefloppy_media_change (ide_drive_t *drive); ! 732: unsigned long idefloppy_capacity (ide_drive_t *drive); ! 733: #endif /* CONFIG_BLK_DEV_IDEFLOPPY */ ! 734: ! 735: #ifdef CONFIG_BLK_DEV_IDESCSI ! 736: void idescsi_setup (ide_drive_t *drive); ! 737: void idescsi_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); ! 738: void idescsi_end_request (byte uptodate, ide_hwgroup_t *hwgroup); ! 739: int idescsi_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg); ! 740: int idescsi_open (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 741: void idescsi_ide_release (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 742: #endif /* CONFIG_BLK_DEV_IDESCSI */ ! 743: ! 744: #ifdef CONFIG_BLK_DEV_TRITON ! 745: void ide_init_triton (byte, byte); ! 746: void ide_init_promise (byte bus, byte fn, ide_hwif_t *hwif0, ide_hwif_t *hwif1, unsigned short dma); ! 747: #endif /* CONFIG_BLK_DEV_TRITON */
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