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 */