ide-disk.c revision 3ee38302ffc63da93eb0313053a990bb3466e275
1/* 2 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 3 * Copyright (C) 1998-2002 Linux ATA Development 4 * Andre Hedrick <andre@linux-ide.org> 5 * Copyright (C) 2003 Red Hat 6 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz 7 */ 8 9/* 10 * Mostly written by Mark Lord <mlord@pobox.com> 11 * and Gadi Oxman <gadio@netvision.net.il> 12 * and Andre Hedrick <andre@linux-ide.org> 13 * 14 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c. 15 */ 16 17#include <linux/types.h> 18#include <linux/string.h> 19#include <linux/kernel.h> 20#include <linux/timer.h> 21#include <linux/mm.h> 22#include <linux/interrupt.h> 23#include <linux/major.h> 24#include <linux/errno.h> 25#include <linux/genhd.h> 26#include <linux/slab.h> 27#include <linux/delay.h> 28#include <linux/mutex.h> 29#include <linux/leds.h> 30#include <linux/ide.h> 31#include <linux/hdreg.h> 32 33#include <asm/byteorder.h> 34#include <asm/irq.h> 35#include <asm/uaccess.h> 36#include <asm/io.h> 37#include <asm/div64.h> 38 39#include "ide-disk.h" 40 41static const u8 ide_rw_cmds[] = { 42 ATA_CMD_READ_MULTI, 43 ATA_CMD_WRITE_MULTI, 44 ATA_CMD_READ_MULTI_EXT, 45 ATA_CMD_WRITE_MULTI_EXT, 46 ATA_CMD_PIO_READ, 47 ATA_CMD_PIO_WRITE, 48 ATA_CMD_PIO_READ_EXT, 49 ATA_CMD_PIO_WRITE_EXT, 50 ATA_CMD_READ, 51 ATA_CMD_WRITE, 52 ATA_CMD_READ_EXT, 53 ATA_CMD_WRITE_EXT, 54}; 55 56static const u8 ide_data_phases[] = { 57 TASKFILE_MULTI_IN, 58 TASKFILE_MULTI_OUT, 59 TASKFILE_IN, 60 TASKFILE_OUT, 61 TASKFILE_IN_DMA, 62 TASKFILE_OUT_DMA, 63}; 64 65static void ide_tf_set_cmd(ide_drive_t *drive, ide_task_t *task, u8 dma) 66{ 67 u8 index, lba48, write; 68 69 lba48 = (task->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; 70 write = (task->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; 71 72 if (dma) 73 index = 8; 74 else 75 index = drive->mult_count ? 0 : 4; 76 77 task->tf.command = ide_rw_cmds[index + lba48 + write]; 78 79 if (dma) 80 index = 8; /* fixup index */ 81 82 task->data_phase = ide_data_phases[index / 2 + write]; 83} 84 85/* 86 * __ide_do_rw_disk() issues READ and WRITE commands to a disk, 87 * using LBA if supported, or CHS otherwise, to address sectors. 88 */ 89static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 90 sector_t block) 91{ 92 ide_hwif_t *hwif = drive->hwif; 93 u16 nsectors = (u16)rq->nr_sectors; 94 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); 95 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 96 ide_task_t task; 97 struct ide_taskfile *tf = &task.tf; 98 ide_startstop_t rc; 99 100 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { 101 if (block + rq->nr_sectors > 1ULL << 28) 102 dma = 0; 103 else 104 lba48 = 0; 105 } 106 107 if (!dma) { 108 ide_init_sg_cmd(drive, rq); 109 ide_map_sg(drive, rq); 110 } 111 112 memset(&task, 0, sizeof(task)); 113 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 114 115 if (drive->dev_flags & IDE_DFLAG_LBA) { 116 if (lba48) { 117 pr_debug("%s: LBA=0x%012llx\n", drive->name, 118 (unsigned long long)block); 119 120 tf->hob_nsect = (nsectors >> 8) & 0xff; 121 tf->hob_lbal = (u8)(block >> 24); 122 if (sizeof(block) != 4) { 123 tf->hob_lbam = (u8)((u64)block >> 32); 124 tf->hob_lbah = (u8)((u64)block >> 40); 125 } 126 127 tf->nsect = nsectors & 0xff; 128 tf->lbal = (u8) block; 129 tf->lbam = (u8)(block >> 8); 130 tf->lbah = (u8)(block >> 16); 131 132 task.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 133 } else { 134 tf->nsect = nsectors & 0xff; 135 tf->lbal = block; 136 tf->lbam = block >>= 8; 137 tf->lbah = block >>= 8; 138 tf->device = (block >> 8) & 0xf; 139 } 140 141 tf->device |= ATA_LBA; 142 } else { 143 unsigned int sect, head, cyl, track; 144 145 track = (int)block / drive->sect; 146 sect = (int)block % drive->sect + 1; 147 head = track % drive->head; 148 cyl = track / drive->head; 149 150 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); 151 152 tf->nsect = nsectors & 0xff; 153 tf->lbal = sect; 154 tf->lbam = cyl; 155 tf->lbah = cyl >> 8; 156 tf->device = head; 157 } 158 159 if (rq_data_dir(rq)) 160 task.tf_flags |= IDE_TFLAG_WRITE; 161 162 ide_tf_set_cmd(drive, &task, dma); 163 task.rq = rq; 164 165 rc = do_rw_taskfile(drive, &task); 166 167 if (rc == ide_stopped && dma) { 168 /* fallback to PIO */ 169 task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 170 ide_tf_set_cmd(drive, &task, 0); 171 ide_init_sg_cmd(drive, rq); 172 rc = do_rw_taskfile(drive, &task); 173 } 174 175 return rc; 176} 177 178/* 179 * 268435455 == 137439 MB or 28bit limit 180 * 320173056 == 163929 MB or 48bit addressing 181 * 1073741822 == 549756 MB or 48bit addressing fake drive 182 */ 183 184static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 185 sector_t block) 186{ 187 ide_hwif_t *hwif = drive->hwif; 188 189 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 190 191 if (!blk_fs_request(rq)) { 192 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 193 ide_end_request(drive, 0, 0); 194 return ide_stopped; 195 } 196 197 ledtrig_ide_activity(); 198 199 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 200 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 201 (unsigned long long)block, rq->nr_sectors, 202 (unsigned long)rq->buffer); 203 204 if (hwif->rw_disk) 205 hwif->rw_disk(drive, rq); 206 207 return __ide_do_rw_disk(drive, rq, block); 208} 209 210/* 211 * Queries for true maximum capacity of the drive. 212 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 213 */ 214static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 215{ 216 ide_task_t args; 217 struct ide_taskfile *tf = &args.tf; 218 u64 addr = 0; 219 220 /* Create IDE/ATA command request structure */ 221 memset(&args, 0, sizeof(ide_task_t)); 222 if (lba48) 223 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 224 else 225 tf->command = ATA_CMD_READ_NATIVE_MAX; 226 tf->device = ATA_LBA; 227 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 228 if (lba48) 229 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 230 /* submit command request */ 231 ide_no_data_taskfile(drive, &args); 232 233 /* if OK, compute maximum address value */ 234 if ((tf->status & 0x01) == 0) 235 addr = ide_get_lba_addr(tf, lba48) + 1; 236 237 return addr; 238} 239 240/* 241 * Sets maximum virtual LBA address of the drive. 242 * Returns new maximum virtual LBA address (> 0) or 0 on failure. 243 */ 244static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) 245{ 246 ide_task_t args; 247 struct ide_taskfile *tf = &args.tf; 248 u64 addr_set = 0; 249 250 addr_req--; 251 /* Create IDE/ATA command request structure */ 252 memset(&args, 0, sizeof(ide_task_t)); 253 tf->lbal = (addr_req >> 0) & 0xff; 254 tf->lbam = (addr_req >>= 8) & 0xff; 255 tf->lbah = (addr_req >>= 8) & 0xff; 256 if (lba48) { 257 tf->hob_lbal = (addr_req >>= 8) & 0xff; 258 tf->hob_lbam = (addr_req >>= 8) & 0xff; 259 tf->hob_lbah = (addr_req >>= 8) & 0xff; 260 tf->command = ATA_CMD_SET_MAX_EXT; 261 } else { 262 tf->device = (addr_req >>= 8) & 0x0f; 263 tf->command = ATA_CMD_SET_MAX; 264 } 265 tf->device |= ATA_LBA; 266 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 267 if (lba48) 268 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 269 /* submit command request */ 270 ide_no_data_taskfile(drive, &args); 271 /* if OK, compute maximum address value */ 272 if ((tf->status & 0x01) == 0) 273 addr_set = ide_get_lba_addr(tf, lba48) + 1; 274 275 return addr_set; 276} 277 278static unsigned long long sectors_to_MB(unsigned long long n) 279{ 280 n <<= 9; /* make it bytes */ 281 do_div(n, 1000000); /* make it MB */ 282 return n; 283} 284 285/* 286 * Some disks report total number of sectors instead of 287 * maximum sector address. We list them here. 288 */ 289static const struct drive_list_entry hpa_list[] = { 290 { "ST340823A", NULL }, 291 { "ST320413A", NULL }, 292 { "ST310211A", NULL }, 293 { NULL, NULL } 294}; 295 296static void idedisk_check_hpa(ide_drive_t *drive) 297{ 298 unsigned long long capacity, set_max; 299 int lba48 = ata_id_lba48_enabled(drive->id); 300 301 capacity = drive->capacity64; 302 303 set_max = idedisk_read_native_max_address(drive, lba48); 304 305 if (ide_in_drive_list(drive->id, hpa_list)) { 306 /* 307 * Since we are inclusive wrt to firmware revisions do this 308 * extra check and apply the workaround only when needed. 309 */ 310 if (set_max == capacity + 1) 311 set_max--; 312 } 313 314 if (set_max <= capacity) 315 return; 316 317 printk(KERN_INFO "%s: Host Protected Area detected.\n" 318 "\tcurrent capacity is %llu sectors (%llu MB)\n" 319 "\tnative capacity is %llu sectors (%llu MB)\n", 320 drive->name, 321 capacity, sectors_to_MB(capacity), 322 set_max, sectors_to_MB(set_max)); 323 324 set_max = idedisk_set_max_address(drive, set_max, lba48); 325 326 if (set_max) { 327 drive->capacity64 = set_max; 328 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 329 drive->name); 330 } 331} 332 333static int ide_disk_get_capacity(ide_drive_t *drive) 334{ 335 u16 *id = drive->id; 336 int lba; 337 338 if (ata_id_lba48_enabled(id)) { 339 /* drive speaks 48-bit LBA */ 340 lba = 1; 341 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 342 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 343 /* drive speaks 28-bit LBA */ 344 lba = 1; 345 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 346 } else { 347 /* drive speaks boring old 28-bit CHS */ 348 lba = 0; 349 drive->capacity64 = drive->cyl * drive->head * drive->sect; 350 } 351 352 if (lba) { 353 drive->dev_flags |= IDE_DFLAG_LBA; 354 355 /* 356 * If this device supports the Host Protected Area feature set, 357 * then we may need to change our opinion about its capacity. 358 */ 359 if (ata_id_hpa_enabled(id)) 360 idedisk_check_hpa(drive); 361 } 362 363 /* limit drive capacity to 137GB if LBA48 cannot be used */ 364 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 365 drive->capacity64 > 1ULL << 28) { 366 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 367 "%llu sectors (%llu MB)\n", 368 drive->name, (unsigned long long)drive->capacity64, 369 sectors_to_MB(drive->capacity64)); 370 drive->capacity64 = 1ULL << 28; 371 } 372 373 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 374 (drive->dev_flags & IDE_DFLAG_LBA48)) { 375 if (drive->capacity64 > 1ULL << 28) { 376 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 377 " will be used for accessing sectors " 378 "> %u\n", drive->name, 1 << 28); 379 } else 380 drive->dev_flags &= ~IDE_DFLAG_LBA48; 381 } 382 383 return 0; 384} 385 386static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 387{ 388 ide_drive_t *drive = q->queuedata; 389 ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC); 390 391 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 392 BUG_ON(task == NULL); 393 394 memset(task, 0, sizeof(*task)); 395 if (ata_id_flush_ext_enabled(drive->id) && 396 (drive->capacity64 >= (1UL << 28))) 397 task->tf.command = ATA_CMD_FLUSH_EXT; 398 else 399 task->tf.command = ATA_CMD_FLUSH; 400 task->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE | 401 IDE_TFLAG_DYN; 402 task->data_phase = TASKFILE_NO_DATA; 403 404 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 405 rq->cmd_flags |= REQ_SOFTBARRIER; 406 rq->special = task; 407} 408 409ide_devset_get(multcount, mult_count); 410 411/* 412 * This is tightly woven into the driver->do_special can not touch. 413 * DON'T do it again until a total personality rewrite is committed. 414 */ 415static int set_multcount(ide_drive_t *drive, int arg) 416{ 417 struct request *rq; 418 int error; 419 420 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 421 return -EINVAL; 422 423 if (drive->special.b.set_multmode) 424 return -EBUSY; 425 426 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 427 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 428 429 drive->mult_req = arg; 430 drive->special.b.set_multmode = 1; 431 error = blk_execute_rq(drive->queue, NULL, rq, 0); 432 blk_put_request(rq); 433 434 return (drive->mult_count == arg) ? 0 : -EIO; 435} 436 437ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 438 439static int set_nowerr(ide_drive_t *drive, int arg) 440{ 441 if (arg < 0 || arg > 1) 442 return -EINVAL; 443 444 if (arg) 445 drive->dev_flags |= IDE_DFLAG_NOWERR; 446 else 447 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 448 449 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 450 451 return 0; 452} 453 454static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 455{ 456 ide_task_t task; 457 458 memset(&task, 0, sizeof(task)); 459 task.tf.feature = feature; 460 task.tf.nsect = nsect; 461 task.tf.command = ATA_CMD_SET_FEATURES; 462 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 463 464 return ide_no_data_taskfile(drive, &task); 465} 466 467static void update_ordered(ide_drive_t *drive) 468{ 469 u16 *id = drive->id; 470 unsigned ordered = QUEUE_ORDERED_NONE; 471 prepare_flush_fn *prep_fn = NULL; 472 473 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 474 unsigned long long capacity; 475 int barrier; 476 /* 477 * We must avoid issuing commands a drive does not 478 * understand or we may crash it. We check flush cache 479 * is supported. We also check we have the LBA48 flush 480 * cache if the drive capacity is too large. By this 481 * time we have trimmed the drive capacity if LBA48 is 482 * not available so we don't need to recheck that. 483 */ 484 capacity = ide_gd_capacity(drive); 485 barrier = ata_id_flush_enabled(id) && 486 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 487 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 488 capacity <= (1ULL << 28) || 489 ata_id_flush_ext_enabled(id)); 490 491 printk(KERN_INFO "%s: cache flushes %ssupported\n", 492 drive->name, barrier ? "" : "not "); 493 494 if (barrier) { 495 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 496 prep_fn = idedisk_prepare_flush; 497 } 498 } else 499 ordered = QUEUE_ORDERED_DRAIN; 500 501 blk_queue_ordered(drive->queue, ordered, prep_fn); 502} 503 504ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 505 506static int set_wcache(ide_drive_t *drive, int arg) 507{ 508 int err = 1; 509 510 if (arg < 0 || arg > 1) 511 return -EINVAL; 512 513 if (ata_id_flush_enabled(drive->id)) { 514 err = ide_do_setfeature(drive, 515 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 516 if (err == 0) { 517 if (arg) 518 drive->dev_flags |= IDE_DFLAG_WCACHE; 519 else 520 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 521 } 522 } 523 524 update_ordered(drive); 525 526 return err; 527} 528 529static int do_idedisk_flushcache(ide_drive_t *drive) 530{ 531 ide_task_t args; 532 533 memset(&args, 0, sizeof(ide_task_t)); 534 if (ata_id_flush_ext_enabled(drive->id)) 535 args.tf.command = ATA_CMD_FLUSH_EXT; 536 else 537 args.tf.command = ATA_CMD_FLUSH; 538 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 539 return ide_no_data_taskfile(drive, &args); 540} 541 542ide_devset_get(acoustic, acoustic); 543 544static int set_acoustic(ide_drive_t *drive, int arg) 545{ 546 if (arg < 0 || arg > 254) 547 return -EINVAL; 548 549 ide_do_setfeature(drive, 550 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 551 552 drive->acoustic = arg; 553 554 return 0; 555} 556 557ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 558 559/* 560 * drive->addressing: 561 * 0: 28-bit 562 * 1: 48-bit 563 * 2: 48-bit capable doing 28-bit 564 */ 565static int set_addressing(ide_drive_t *drive, int arg) 566{ 567 if (arg < 0 || arg > 2) 568 return -EINVAL; 569 570 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 571 ata_id_lba48_enabled(drive->id) == 0)) 572 return -EIO; 573 574 if (arg == 2) 575 arg = 0; 576 577 if (arg) 578 drive->dev_flags |= IDE_DFLAG_LBA48; 579 else 580 drive->dev_flags &= ~IDE_DFLAG_LBA48; 581 582 return 0; 583} 584 585ide_ext_devset_rw(acoustic, acoustic); 586ide_ext_devset_rw(address, addressing); 587ide_ext_devset_rw(multcount, multcount); 588ide_ext_devset_rw(wcache, wcache); 589 590ide_ext_devset_rw_sync(nowerr, nowerr); 591 592static int ide_disk_check(ide_drive_t *drive, const char *s) 593{ 594 return 1; 595} 596 597static void ide_disk_setup(ide_drive_t *drive) 598{ 599 struct ide_disk_obj *idkp = drive->driver_data; 600 struct request_queue *q = drive->queue; 601 ide_hwif_t *hwif = drive->hwif; 602 u16 *id = drive->id; 603 char *m = (char *)&id[ATA_ID_PROD]; 604 unsigned long long capacity; 605 606 ide_proc_register_driver(drive, idkp->driver); 607 608 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 609 return; 610 611 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 612 /* 613 * Removable disks (eg. SYQUEST); ignore 'WD' drives 614 */ 615 if (m[0] != 'W' || m[1] != 'D') 616 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 617 } 618 619 (void)set_addressing(drive, 1); 620 621 if (drive->dev_flags & IDE_DFLAG_LBA48) { 622 int max_s = 2048; 623 624 if (max_s > hwif->rqsize) 625 max_s = hwif->rqsize; 626 627 blk_queue_max_sectors(q, max_s); 628 } 629 630 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 631 q->max_sectors / 2); 632 633 if (ata_id_is_ssd(id)) 634 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); 635 636 /* calculate drive capacity, and select LBA if possible */ 637 ide_disk_get_capacity(drive); 638 639 /* 640 * if possible, give fdisk access to more of the drive, 641 * by correcting bios_cyls: 642 */ 643 capacity = ide_gd_capacity(drive); 644 645 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 646 if (ata_id_lba48_enabled(drive->id)) { 647 /* compatibility */ 648 drive->bios_sect = 63; 649 drive->bios_head = 255; 650 } 651 652 if (drive->bios_sect && drive->bios_head) { 653 unsigned int cap0 = capacity; /* truncate to 32 bits */ 654 unsigned int cylsz, cyl; 655 656 if (cap0 != capacity) 657 drive->bios_cyl = 65535; 658 else { 659 cylsz = drive->bios_sect * drive->bios_head; 660 cyl = cap0 / cylsz; 661 if (cyl > 65535) 662 cyl = 65535; 663 if (cyl > drive->bios_cyl) 664 drive->bios_cyl = cyl; 665 } 666 } 667 } 668 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 669 drive->name, capacity, sectors_to_MB(capacity)); 670 671 /* Only print cache size when it was specified */ 672 if (id[ATA_ID_BUF_SIZE]) 673 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 674 675 printk(KERN_CONT ", CHS=%d/%d/%d\n", 676 drive->bios_cyl, drive->bios_head, drive->bios_sect); 677 678 /* write cache enabled? */ 679 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 680 drive->dev_flags |= IDE_DFLAG_WCACHE; 681 682 set_wcache(drive, 1); 683 684 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 685 (drive->head == 0 || drive->head > 16)) { 686 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 687 drive->name, drive->head); 688 drive->dev_flags &= ~IDE_DFLAG_ATTACH; 689 } else 690 drive->dev_flags |= IDE_DFLAG_ATTACH; 691} 692 693static void ide_disk_flush(ide_drive_t *drive) 694{ 695 if (ata_id_flush_enabled(drive->id) == 0 || 696 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 697 return; 698 699 if (do_idedisk_flushcache(drive)) 700 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 701} 702 703static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 704{ 705 return 0; 706} 707 708static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 709 int on) 710{ 711 ide_task_t task; 712 int ret; 713 714 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 715 return 0; 716 717 memset(&task, 0, sizeof(task)); 718 task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 719 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 720 721 ret = ide_no_data_taskfile(drive, &task); 722 723 if (ret) 724 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 725 726 return ret; 727} 728 729const struct ide_disk_ops ide_ata_disk_ops = { 730 .check = ide_disk_check, 731 .get_capacity = ide_disk_get_capacity, 732 .setup = ide_disk_setup, 733 .flush = ide_disk_flush, 734 .init_media = ide_disk_init_media, 735 .set_doorlock = ide_disk_set_doorlock, 736 .do_request = ide_do_rw_disk, 737 .ioctl = ide_disk_ioctl, 738}; 739