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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_VLB_SYNC /* 1 to support weird 32-bit chips */ ! 29: #define SUPPORT_VLB_SYNC 1 /* 0 to reduce kernel size */ ! 30: #endif ! 31: #ifndef DISK_RECOVERY_TIME /* off=0; on=access_delay_time */ ! 32: #define DISK_RECOVERY_TIME 0 /* for hardware that needs it */ ! 33: #endif ! 34: #ifndef OK_TO_RESET_CONTROLLER /* 1 needed for good error recovery */ ! 35: #define OK_TO_RESET_CONTROLLER 1 /* 0 for use with AH2372A/B interface */ ! 36: #endif ! 37: #ifndef FAKE_FDISK_FOR_EZDRIVE /* 1 to help linux fdisk with EZDRIVE */ ! 38: #define FAKE_FDISK_FOR_EZDRIVE 1 /* 0 to reduce kernel size */ ! 39: #endif ! 40: #ifndef FANCY_STATUS_DUMPS /* 1 for human-readable drive errors */ ! 41: #define FANCY_STATUS_DUMPS 1 /* 0 to reduce kernel size */ ! 42: #endif ! 43: ! 44: #if defined(CONFIG_BLK_DEV_IDECD) || defined(CONFIG_BLK_DEV_IDETAPE) ! 45: #define CONFIG_BLK_DEV_IDEATAPI 1 ! 46: #endif ! 47: ! 48: /* ! 49: * IDE_DRIVE_CMD is used to implement many features of the hdparm utility ! 50: */ ! 51: #define IDE_DRIVE_CMD 99 /* (magic) undef to reduce kernel size*/ ! 52: ! 53: /* ! 54: * "No user-serviceable parts" beyond this point :) ! 55: *****************************************************************************/ ! 56: ! 57: typedef unsigned char byte; /* used everywhere */ ! 58: ! 59: /* ! 60: * Probably not wise to fiddle with these ! 61: */ ! 62: #define ERROR_MAX 8 /* Max read/write errors per sector */ ! 63: #define ERROR_RESET 3 /* Reset controller every 4th retry */ ! 64: #define ERROR_RECAL 1 /* Recalibrate every 2nd retry */ ! 65: ! 66: /* ! 67: * Ensure that various configuration flags have compatible settings ! 68: */ ! 69: #ifdef REALLY_SLOW_IO ! 70: #undef REALLY_FAST_IO ! 71: #endif ! 72: ! 73: /* ! 74: * Definitions for accessing IDE controller registers ! 75: */ ! 76: ! 77: #define HWIF(drive) ((ide_hwif_t *)drive->hwif) ! 78: #define HWGROUP(drive) ((ide_hwgroup_t *)(HWIF(drive)->hwgroup)) ! 79: ! 80: #define IDE_DATA_OFFSET (0) ! 81: #define IDE_ERROR_OFFSET (1) ! 82: #define IDE_NSECTOR_OFFSET (2) ! 83: #define IDE_SECTOR_OFFSET (3) ! 84: #define IDE_LCYL_OFFSET (4) ! 85: #define IDE_HCYL_OFFSET (5) ! 86: #define IDE_SELECT_OFFSET (6) ! 87: #define IDE_STATUS_OFFSET (7) ! 88: #define IDE_FEATURE_OFFSET IDE_ERROR_OFFSET ! 89: #define IDE_COMMAND_OFFSET IDE_STATUS_OFFSET ! 90: ! 91: #define IDE_DATA_REG (HWIF(drive)->io_base+IDE_DATA_OFFSET) ! 92: #define IDE_ERROR_REG (HWIF(drive)->io_base+IDE_ERROR_OFFSET) ! 93: #define IDE_NSECTOR_REG (HWIF(drive)->io_base+IDE_NSECTOR_OFFSET) ! 94: #define IDE_SECTOR_REG (HWIF(drive)->io_base+IDE_SECTOR_OFFSET) ! 95: #define IDE_LCYL_REG (HWIF(drive)->io_base+IDE_LCYL_OFFSET) ! 96: #define IDE_HCYL_REG (HWIF(drive)->io_base+IDE_HCYL_OFFSET) ! 97: #define IDE_SELECT_REG (HWIF(drive)->io_base+IDE_SELECT_OFFSET) ! 98: #define IDE_STATUS_REG (HWIF(drive)->io_base+IDE_STATUS_OFFSET) ! 99: #define IDE_CONTROL_REG (HWIF(drive)->ctl_port) ! 100: #define IDE_FEATURE_REG IDE_ERROR_REG ! 101: #define IDE_COMMAND_REG IDE_STATUS_REG ! 102: #define IDE_ALTSTATUS_REG IDE_CONTROL_REG ! 103: ! 104: #ifdef REALLY_FAST_IO ! 105: #define OUT_BYTE(b,p) outb((b),p) ! 106: #define IN_BYTE(p) (byte)inb(p) ! 107: #else ! 108: #define OUT_BYTE(b,p) outb_p((b),p) ! 109: #define IN_BYTE(p) (byte)inb_p(p) ! 110: #endif /* REALLY_FAST_IO */ ! 111: ! 112: #define GET_ERR() IN_BYTE(IDE_ERROR_REG) ! 113: #define GET_STAT() IN_BYTE(IDE_STATUS_REG) ! 114: #define OK_STAT(stat,good,bad) (((stat)&((good)|(bad)))==(good)) ! 115: #define BAD_R_STAT (BUSY_STAT | ERR_STAT) ! 116: #define BAD_W_STAT (BAD_R_STAT | WRERR_STAT) ! 117: #define BAD_STAT (BAD_R_STAT | DRQ_STAT) ! 118: #define DRIVE_READY (READY_STAT | SEEK_STAT) ! 119: #define DATA_READY (DRIVE_READY | DRQ_STAT) ! 120: ! 121: /* ! 122: * Some more useful definitions ! 123: */ ! 124: #define IDE_MAJOR_NAME "ide" /* the same for all i/f; see also genhd.c */ ! 125: #define MAJOR_NAME IDE_MAJOR_NAME ! 126: #define PARTN_BITS 6 /* number of minor dev bits for partitions */ ! 127: #define PARTN_MASK ((1<<PARTN_BITS)-1) /* a useful bit mask */ ! 128: #define MAX_DRIVES 2 /* per interface; 2 assumed by lots of code */ ! 129: #define MAX_HWIFS 4 /* an arbitrary, but realistic limit */ ! 130: #define SECTOR_WORDS (512 / 4) /* number of 32bit words per sector */ ! 131: ! 132: /* ! 133: * Timeouts for various operations: ! 134: */ ! 135: #define WAIT_DRQ (5*HZ/100) /* 50msec - spec allows up to 20ms */ ! 136: #define WAIT_READY (3*HZ/100) /* 30msec - should be instantaneous */ ! 137: #define WAIT_PIDENTIFY (1*HZ) /* 1sec - should be less than 3ms (?) */ ! 138: #define WAIT_WORSTCASE (30*HZ) /* 30sec - worst case when spinning up */ ! 139: #define WAIT_CMD (10*HZ) /* 10sec - maximum wait for an IRQ to happen */ ! 140: ! 141: #ifdef CONFIG_BLK_DEV_IDETAPE ! 142: #include "ide-tape.h" ! 143: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 144: ! 145: #ifdef CONFIG_BLK_DEV_IDECD ! 146: ! 147: struct atapi_request_sense { ! 148: unsigned char error_code : 7; ! 149: unsigned char valid : 1; ! 150: byte reserved1; ! 151: unsigned char sense_key : 4; ! 152: unsigned char reserved2 : 1; ! 153: unsigned char ili : 1; ! 154: unsigned char reserved3 : 2; ! 155: byte info[4]; ! 156: byte sense_len; ! 157: byte command_info[4]; ! 158: byte asc; ! 159: byte ascq; ! 160: byte fru; ! 161: byte sense_key_specific[3]; ! 162: }; ! 163: ! 164: struct packet_command { ! 165: char *buffer; ! 166: int buflen; ! 167: int stat; ! 168: struct atapi_request_sense *sense_data; ! 169: unsigned char c[12]; ! 170: }; ! 171: ! 172: /* Space to hold the disk TOC. */ ! 173: ! 174: #define MAX_TRACKS 99 ! 175: struct atapi_toc_header { ! 176: unsigned short toc_length; ! 177: byte first_track; ! 178: byte last_track; ! 179: }; ! 180: ! 181: struct atapi_toc_entry { ! 182: byte reserved1; ! 183: unsigned control : 4; ! 184: unsigned adr : 4; ! 185: byte track; ! 186: byte reserved2; ! 187: union { ! 188: unsigned lba; ! 189: struct { ! 190: byte reserved3; ! 191: byte m; ! 192: byte s; ! 193: byte f; ! 194: } msf; ! 195: } addr; ! 196: }; ! 197: ! 198: struct atapi_toc { ! 199: int last_session_lba; ! 200: int xa_flag; ! 201: unsigned capacity; ! 202: struct atapi_toc_header hdr; ! 203: struct atapi_toc_entry ent[MAX_TRACKS+1]; /* One extra for the leadout. */ ! 204: }; ! 205: ! 206: ! 207: /* This structure is annoyingly close to, but not identical with, ! 208: the cdrom_subchnl structure from cdrom.h. */ ! 209: struct atapi_cdrom_subchnl ! 210: { ! 211: u_char acdsc_reserved; ! 212: u_char acdsc_audiostatus; ! 213: u_short acdsc_length; ! 214: u_char acdsc_format; ! 215: ! 216: u_char acdsc_adr: 4; ! 217: u_char acdsc_ctrl: 4; ! 218: u_char acdsc_trk; ! 219: u_char acdsc_ind; ! 220: union ! 221: { ! 222: struct ! 223: { ! 224: u_char minute; ! 225: u_char second; ! 226: u_char frame; ! 227: } msf; ! 228: int lba; ! 229: } acdsc_absaddr; ! 230: union ! 231: { ! 232: struct ! 233: { ! 234: u_char minute; ! 235: u_char second; ! 236: u_char frame; ! 237: } msf; ! 238: int lba; ! 239: } acdsc_reladdr; ! 240: }; ! 241: ! 242: ! 243: /* Extra per-device info for cdrom drives. */ ! 244: struct cdrom_info { ! 245: ! 246: /* Buffer for table of contents. NULL if we haven't allocated ! 247: a TOC buffer for this device yet. */ ! 248: ! 249: struct atapi_toc *toc; ! 250: ! 251: /* Sector buffer. If a read request wants only the first part of a cdrom ! 252: block, we cache the rest of the block here, in the expectation that that ! 253: data is going to be wanted soon. SECTOR_BUFFERED is the number of the ! 254: first buffered sector, and NSECTORS_BUFFERED is the number of sectors ! 255: in the buffer. Before the buffer is allocated, we should have ! 256: SECTOR_BUFFER == NULL and NSECTORS_BUFFERED == 0. */ ! 257: ! 258: unsigned long sector_buffered; ! 259: unsigned long nsectors_buffered; ! 260: char *sector_buffer; ! 261: ! 262: /* The result of the last successful request sense command ! 263: on this device. */ ! 264: struct atapi_request_sense sense_data; ! 265: }; ! 266: ! 267: #endif /* CONFIG_BLK_DEV_IDECD */ ! 268: ! 269: /* ! 270: * Now for the data we need to maintain per-drive: ide_drive_t ! 271: */ ! 272: ! 273: typedef enum {ide_disk, ide_cdrom, ide_tape} ide_media_t; ! 274: ! 275: typedef union { ! 276: unsigned all : 8; /* all of the bits together */ ! 277: struct { ! 278: unsigned set_geometry : 1; /* respecify drive geometry */ ! 279: unsigned recalibrate : 1; /* seek to cyl 0 */ ! 280: unsigned set_multmode : 1; /* set multmode count */ ! 281: unsigned set_pio : 1; /* set pio mode */ ! 282: unsigned reserved : 4; /* unused */ ! 283: } b; ! 284: } special_t; ! 285: ! 286: typedef union { ! 287: unsigned all : 8; /* all of the bits together */ ! 288: struct { ! 289: unsigned head : 4; /* always zeros here */ ! 290: unsigned unit : 1; /* drive select number, 0 or 1 */ ! 291: unsigned bit5 : 1; /* always 1 */ ! 292: unsigned lba : 1; /* using LBA instead of CHS */ ! 293: unsigned bit7 : 1; /* always 1 */ ! 294: } b; ! 295: } select_t; ! 296: ! 297: typedef struct ide_drive_s { ! 298: special_t special; /* special action flags */ ! 299: unsigned present : 1; /* drive is physically present */ ! 300: unsigned noprobe : 1; /* from: hdx=noprobe */ ! 301: unsigned keep_settings : 1; /* restore settings after drive reset */ ! 302: unsigned busy : 1; /* currently doing revalidate_disk() */ ! 303: unsigned removeable : 1; /* 1 if need to do check_media_change */ ! 304: unsigned using_dma : 1; /* disk is using dma for read/write */ ! 305: unsigned forced_geom : 1; /* 1 if hdx=c,h,s was given at boot */ ! 306: unsigned unmask : 1; /* flag: okay to unmask other irqs */ ! 307: unsigned autotune : 2; /* 1=autotune, 2=noautotune, 0=default */ ! 308: #if FAKE_FDISK_FOR_EZDRIVE ! 309: unsigned remap_0_to_1 : 1; /* flag: partitioned with ezdrive */ ! 310: #endif /* FAKE_FDISK_FOR_EZDRIVE */ ! 311: ide_media_t media; /* disk, cdrom, tape */ ! 312: select_t select; /* basic drive/head select reg value */ ! 313: byte ctl; /* "normal" value for IDE_CONTROL_REG */ ! 314: byte ready_stat; /* min status value for drive ready */ ! 315: byte mult_count; /* current multiple sector setting */ ! 316: byte mult_req; /* requested multiple sector setting */ ! 317: byte pio_req; /* requested multiple sector setting */ ! 318: byte io_32bit; /* 0=16-bit, 1=32-bit, 2/3=32bit+sync */ ! 319: byte bad_wstat; /* used for ignoring WRERR_STAT */ ! 320: byte sect0; /* offset of first sector for DM6:DDO */ ! 321: byte usage; /* current "open()" count for drive */ ! 322: byte head; /* "real" number of heads */ ! 323: byte sect; /* "real" sectors per track */ ! 324: byte bios_head; /* BIOS/fdisk/LILO number of heads */ ! 325: byte bios_sect; /* BIOS/fdisk/LILO sectors per track */ ! 326: unsigned short bios_cyl; /* BIOS/fdisk/LILO number of cyls */ ! 327: unsigned short cyl; /* "real" number of cyls */ ! 328: void *hwif; /* actually (ide_hwif_t *) */ ! 329: struct wait_queue *wqueue; /* used to wait for drive in open() */ ! 330: struct hd_driveid *id; /* drive model identification info */ ! 331: struct hd_struct *part; /* drive partition table */ ! 332: char name[4]; /* drive name, such as "hda" */ ! 333: #ifdef CONFIG_BLK_DEV_IDECD ! 334: struct cdrom_info cdrom_info; /* for ide-cd.c */ ! 335: #endif /* CONFIG_BLK_DEV_IDECD */ ! 336: #ifdef CONFIG_BLK_DEV_IDETAPE ! 337: idetape_tape_t tape; /* for ide-tape.c */ ! 338: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 339: ! 340: } ide_drive_t; ! 341: ! 342: /* ! 343: * An ide_dmaproc_t() initiates/aborts DMA read/write operations on a drive. ! 344: * ! 345: * The caller is assumed to have selected the drive and programmed the drive's ! 346: * sector address using CHS or LBA. All that remains is to prepare for DMA ! 347: * and then issue the actual read/write DMA/PIO command to the drive. ! 348: * ! 349: * Returns 0 if all went well. ! 350: * Returns 1 if DMA read/write could not be started, in which case the caller ! 351: * should either try again later, or revert to PIO for the current request. ! 352: */ ! 353: typedef enum { ide_dma_read = 0, ide_dma_write = 1, ! 354: ide_dma_abort = 2, ide_dma_check = 3, ! 355: ide_dma_status_bad = 4, ide_dma_transferred = 5, ! 356: ide_dma_begin = 6 } ! 357: ide_dma_action_t; ! 358: ! 359: typedef int (ide_dmaproc_t)(ide_dma_action_t, ide_drive_t *); ! 360: ! 361: ! 362: /* ! 363: * An ide_tuneproc_t() is used to set the speed of an IDE interface ! 364: * to a particular PIO mode. The "byte" parameter is used ! 365: * to select the PIO mode by number (0,1,2,3,4,5), and a value of 255 ! 366: * indicates that the interface driver should "auto-tune" the PIO mode ! 367: * according to the drive capabilities in drive->id; ! 368: * ! 369: * Not all interface types support tuning, and not all of those ! 370: * support all possible PIO settings. They may silently ignore ! 371: * or round values as they see fit. ! 372: */ ! 373: typedef void (ide_tuneproc_t)(ide_drive_t *, byte); ! 374: ! 375: /* ! 376: * This is used to provide HT6560B interface support. ! 377: * It will probably also be used by the DC4030VL driver. ! 378: */ ! 379: typedef void (ide_selectproc_t) (ide_drive_t *); ! 380: ! 381: /* ! 382: * hwif_chipset_t is used to keep track of the specific hardware ! 383: * chipset used by each IDE interface, if known. ! 384: */ ! 385: typedef enum { ide_unknown, ide_generic, ide_triton, ! 386: ide_cmd640, ide_dtc2278, ide_ali14xx, ! 387: ide_qd6580, ide_umc8672, ide_ht6560b } ! 388: hwif_chipset_t; ! 389: ! 390: typedef struct hwif_s { ! 391: struct hwif_s *next; /* for linked-list in ide_hwgroup_t */ ! 392: void *hwgroup; /* actually (ide_hwgroup_t *) */ ! 393: unsigned short io_base; /* base io port addr */ ! 394: unsigned short ctl_port; /* usually io_base+0x206 */ ! 395: ide_drive_t drives[MAX_DRIVES]; /* drive info */ ! 396: struct gendisk *gd; /* gendisk structure */ ! 397: ide_tuneproc_t *tuneproc; /* routine to tune PIO mode for drives */ ! 398: #ifdef CONFIG_BLK_DEV_HT6560B ! 399: ide_selectproc_t *selectproc; /* tweaks hardware to select drive */ ! 400: #endif /* CONFIG_BLK_DEV_HT6560B */ ! 401: ide_dmaproc_t *dmaproc; /* dma read/write/abort routine */ ! 402: unsigned long *dmatable; /* dma physical region descriptor table */ ! 403: unsigned short dma_base; /* base addr for dma ports (triton) */ ! 404: byte irq; /* our irq number */ ! 405: byte major; /* our major number */ ! 406: char name[5]; /* name of interface, eg. "ide0" */ ! 407: byte index; /* 0 for ide0; 1 for ide1; ... */ ! 408: hwif_chipset_t chipset; /* sub-module for tuning.. */ ! 409: unsigned noprobe : 1; /* don't probe for this interface */ ! 410: unsigned present : 1; /* this interface exists */ ! 411: unsigned serialized : 1; /* valid only for ide_hwifs[0] */ ! 412: unsigned no_unmask : 1; /* disallow setting unmask bits */ ! 413: #if (DISK_RECOVERY_TIME > 0) ! 414: unsigned long last_time; /* time when previous rq was done */ ! 415: #endif ! 416: #ifdef CONFIG_BLK_DEV_IDECD ! 417: struct request request_sense_request; /* from ide-cd.c */ ! 418: struct packet_command request_sense_pc; /* from ide-cd.c */ ! 419: #endif /* CONFIG_BLK_DEV_IDECD */ ! 420: #ifdef CONFIG_BLK_DEV_IDETAPE ! 421: ide_drive_t *tape_drive; /* Pointer to the tape on this interface */ ! 422: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 423: } ide_hwif_t; ! 424: ! 425: /* ! 426: * internal ide interrupt handler type ! 427: */ ! 428: typedef void (ide_handler_t)(ide_drive_t *); ! 429: ! 430: typedef struct hwgroup_s { ! 431: ide_handler_t *handler;/* irq handler, if active */ ! 432: ide_drive_t *drive; /* current drive */ ! 433: ide_hwif_t *hwif; /* ptr to current hwif in linked-list */ ! 434: struct request *rq; /* current request */ ! 435: struct timer_list timer; /* failsafe timer */ ! 436: struct request wrq; /* local copy of current write rq */ ! 437: unsigned long poll_timeout; /* timeout value during long polls */ ! 438: } ide_hwgroup_t; ! 439: ! 440: /* ! 441: * ide_hwifs[] is the master data structure used to keep track ! 442: * of just about everything in ide.c. Whenever possible, routines ! 443: * should be using pointers to a drive (ide_drive_t *) or ! 444: * pointers to a hwif (ide_hwif_t *), rather than indexing this ! 445: * structure directly (the allocation/layout may change!). ! 446: */ ! 447: #ifdef _IDE_C ! 448: ide_hwif_t ide_hwifs[MAX_HWIFS]; /* master data repository */ ! 449: #else ! 450: extern ide_hwif_t ide_hwifs[]; ! 451: #endif ! 452: ! 453: /* ! 454: * One final include file, which references some of the data/defns from above ! 455: */ ! 456: #define IDE_DRIVER /* "parameter" for blk.h */ ! 457: #include <linux/blk.h> ! 458: ! 459: #if (DISK_RECOVERY_TIME > 0) ! 460: void ide_set_recovery_timer (ide_hwif_t *); ! 461: #define SET_RECOVERY_TIMER(drive) ide_set_recovery_timer (drive) ! 462: #else ! 463: #define SET_RECOVERY_TIMER(drive) ! 464: #endif ! 465: ! 466: /* ! 467: * This is used for (nearly) all data transfers from the IDE interface ! 468: */ ! 469: void ide_input_data (ide_drive_t *drive, void *buffer, unsigned int wcount); ! 470: ! 471: /* ! 472: * This is used for (nearly) all data transfers to the IDE interface ! 473: */ ! 474: void ide_output_data (ide_drive_t *drive, void *buffer, unsigned int wcount); ! 475: ! 476: /* ! 477: * This is used on exit from the driver, to designate the next irq handler ! 478: * and also to start the safety timer. ! 479: */ ! 480: void ide_set_handler (ide_drive_t *drive, ide_handler_t *handler, unsigned int timeout); ! 481: ! 482: /* ! 483: * Error reporting, in human readable form (luxurious, but a memory hog). ! 484: */ ! 485: byte ide_dump_status (ide_drive_t *drive, const char *msg, byte stat); ! 486: ! 487: /* ! 488: * ide_error() takes action based on the error returned by the controller. ! 489: * The calling function must return afterwards, to restart the request. ! 490: */ ! 491: void ide_error (ide_drive_t *drive, const char *msg, byte stat); ! 492: ! 493: /* ! 494: * ide_fixstring() cleans up and (optionally) byte-swaps a text string, ! 495: * removing leading/trailing blanks and compressing internal blanks. ! 496: * It is primarily used to tidy up the model name/number fields as ! 497: * returned by the WIN_[P]IDENTIFY commands. ! 498: */ ! 499: void ide_fixstring (byte *s, const int bytecount, const int byteswap); ! 500: ! 501: /* ! 502: * This routine busy-waits for the drive status to be not "busy". ! 503: * It then checks the status for all of the "good" bits and none ! 504: * of the "bad" bits, and if all is okay it returns 0. All other ! 505: * cases return 1 after invoking ide_error() -- caller should return. ! 506: * ! 507: */ ! 508: int ide_wait_stat (ide_drive_t *drive, byte good, byte bad, unsigned long timeout); ! 509: ! 510: /* ! 511: * This routine is called from the partition-table code in genhd.c ! 512: * to "convert" a drive to a logical geometry with fewer than 1024 cyls. ! 513: * ! 514: * The second parameter, "xparm", determines exactly how the translation ! 515: * will be handled: ! 516: * 0 = convert to CHS with fewer than 1024 cyls ! 517: * using the same method as Ontrack DiskManager. ! 518: * 1 = same as "0", plus offset everything by 63 sectors. ! 519: * -1 = similar to "0", plus redirect sector 0 to sector 1. ! 520: * >1 = convert to a CHS geometry with "xparm" heads. ! 521: * ! 522: * Returns 0 if the translation was not possible, if the device was not ! 523: * an IDE disk drive, or if a geometry was "forced" on the commandline. ! 524: * Returns 1 if the geometry translation was successful. ! 525: */ ! 526: int ide_xlate_1024 (kdev_t, int, const char *); ! 527: ! 528: /* ! 529: * Start a reset operation for an IDE interface. ! 530: * The caller should return immediately after invoking this. ! 531: */ ! 532: void ide_do_reset (ide_drive_t *); ! 533: ! 534: /* ! 535: * This function is intended to be used prior to invoking ide_do_drive_cmd(). ! 536: */ ! 537: void ide_init_drive_cmd (struct request *rq); ! 538: ! 539: /* ! 540: * "action" parameter type for ide_do_drive_cmd() below. ! 541: */ ! 542: typedef enum ! 543: {ide_wait, /* insert rq at end of list, and wait for it */ ! 544: ide_next, /* insert rq immediately after current request */ ! 545: ide_preempt, /* insert rq in front of current request */ ! 546: ide_end} /* insert rq at end of list, but don't wait for it */ ! 547: ide_action_t; ! 548: ! 549: /* ! 550: * This function issues a special IDE device request ! 551: * onto the request queue. ! 552: * ! 553: * If action is ide_wait, then then rq is queued at the end of ! 554: * the request queue, and the function sleeps until it has been ! 555: * processed. This is for use when invoked from an ioctl handler. ! 556: * ! 557: * If action is ide_preempt, then the rq is queued at the head of ! 558: * the request queue, displacing the currently-being-processed ! 559: * request and this function returns immediately without waiting ! 560: * for the new rq to be completed. This is VERY DANGEROUS, and is ! 561: * intended for careful use by the ATAPI tape/cdrom driver code. ! 562: * ! 563: * If action is ide_next, then the rq is queued immediately after ! 564: * the currently-being-processed-request (if any), and the function ! 565: * returns without waiting for the new rq to be completed. As above, ! 566: * This is VERY DANGEROUS, and is intended for careful use by the ! 567: * ATAPI tape/cdrom driver code. ! 568: * ! 569: * If action is ide_end, then the rq is queued at the end of the ! 570: * request queue, and the function returns immediately without waiting ! 571: * for the new rq to be completed. This is again intended for careful ! 572: * use by the ATAPI tape/cdrom driver code. (Currently used by ide-tape.c, ! 573: * when operating in the pipelined operation mode). ! 574: */ ! 575: int ide_do_drive_cmd (ide_drive_t *drive, struct request *rq, ide_action_t action); ! 576: ! 577: /* ! 578: * Clean up after success/failure of an explicit drive cmd. ! 579: * stat/err are used only when (HWGROUP(drive)->rq->cmd == IDE_DRIVE_CMD). ! 580: */ ! 581: void ide_end_drive_cmd (ide_drive_t *drive, byte stat, byte err); ! 582: ! 583: #ifdef CONFIG_BLK_DEV_IDECD ! 584: /* ! 585: * These are routines in ide-cd.c invoked from ide.c ! 586: */ ! 587: void ide_do_rw_cdrom (ide_drive_t *, unsigned long); ! 588: int ide_cdrom_ioctl (ide_drive_t *, struct inode *, struct file *, unsigned int, unsigned long); ! 589: int ide_cdrom_check_media_change (ide_drive_t *); ! 590: int ide_cdrom_open (struct inode *, struct file *, ide_drive_t *); ! 591: void ide_cdrom_release (struct inode *, struct file *, ide_drive_t *); ! 592: void ide_cdrom_setup (ide_drive_t *); ! 593: #endif /* CONFIG_BLK_DEV_IDECD */ ! 594: ! 595: #ifdef CONFIG_BLK_DEV_IDETAPE ! 596: ! 597: /* ! 598: * Functions in ide-tape.c which are invoked from ide.c: ! 599: */ ! 600: ! 601: /* ! 602: * idetape_identify_device is called during device probing stage to ! 603: * probe for an ide atapi tape drive and to initialize global variables ! 604: * in ide-tape.c which provide the link between the character device ! 605: * and the correspoding block device. ! 606: * ! 607: * Returns 1 if an ide tape was detected and is supported. ! 608: * Returns 0 otherwise. ! 609: */ ! 610: ! 611: int idetape_identify_device (ide_drive_t *drive,struct hd_driveid *id); ! 612: ! 613: /* ! 614: * idetape_setup is called a bit later than idetape_identify_device, ! 615: * during the search for disk partitions, to initialize various tape ! 616: * state variables in ide_drive_t *drive. ! 617: */ ! 618: ! 619: void idetape_setup (ide_drive_t *drive); ! 620: ! 621: /* ! 622: * idetape_do_request is our request function. It is called by ide.c ! 623: * to process a new request. ! 624: */ ! 625: ! 626: void idetape_do_request (ide_drive_t *drive, struct request *rq, unsigned long block); ! 627: ! 628: /* ! 629: * idetape_end_request is used to finish servicing a request, and to ! 630: * insert a pending pipeline request into the main device queue. ! 631: */ ! 632: ! 633: void idetape_end_request (byte uptodate, ide_hwgroup_t *hwgroup); ! 634: ! 635: /* ! 636: * Block device interface functions. ! 637: */ ! 638: ! 639: int idetape_blkdev_ioctl (ide_drive_t *drive, struct inode *inode, struct file *file, ! 640: unsigned int cmd, unsigned long arg); ! 641: int idetape_blkdev_open (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 642: void idetape_blkdev_release (struct inode *inode, struct file *filp, ide_drive_t *drive); ! 643: ! 644: /* ! 645: * idetape_register_chrdev initializes the character device interface to ! 646: * the ide tape drive. ! 647: */ ! 648: ! 649: void idetape_register_chrdev (void); ! 650: ! 651: #endif /* CONFIG_BLK_DEV_IDETAPE */ ! 652: ! 653: #ifdef CONFIG_BLK_DEV_TRITON ! 654: void ide_init_triton (byte, byte); ! 655: #endif /* CONFIG_BLK_DEV_TRITON */
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