ide-disk.c revision 806f80a6fc203ad0bde84e5a9e94572617d2ae45
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 <alan@redhat.com> 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 = HWIF(drive); 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 if (!dma) 164 hwif->data_phase = task.data_phase; 165 task.rq = rq; 166 167 rc = do_rw_taskfile(drive, &task); 168 169 if (rc == ide_stopped && dma) { 170 /* fallback to PIO */ 171 task.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 172 ide_tf_set_cmd(drive, &task, 0); 173 hwif->data_phase = task.data_phase; 174 ide_init_sg_cmd(drive, rq); 175 rc = do_rw_taskfile(drive, &task); 176 } 177 178 return rc; 179} 180 181/* 182 * 268435455 == 137439 MB or 28bit limit 183 * 320173056 == 163929 MB or 48bit addressing 184 * 1073741822 == 549756 MB or 48bit addressing fake drive 185 */ 186 187static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 188 sector_t block) 189{ 190 ide_hwif_t *hwif = HWIF(drive); 191 192 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 193 194 if (!blk_fs_request(rq)) { 195 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 196 ide_end_request(drive, 0, 0); 197 return ide_stopped; 198 } 199 200 ledtrig_ide_activity(); 201 202 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 203 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 204 (unsigned long long)block, rq->nr_sectors, 205 (unsigned long)rq->buffer); 206 207 if (hwif->rw_disk) 208 hwif->rw_disk(drive, rq); 209 210 return __ide_do_rw_disk(drive, rq, block); 211} 212 213/* 214 * Queries for true maximum capacity of the drive. 215 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 216 */ 217static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 218{ 219 ide_task_t args; 220 struct ide_taskfile *tf = &args.tf; 221 u64 addr = 0; 222 223 /* Create IDE/ATA command request structure */ 224 memset(&args, 0, sizeof(ide_task_t)); 225 if (lba48) 226 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 227 else 228 tf->command = ATA_CMD_READ_NATIVE_MAX; 229 tf->device = ATA_LBA; 230 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 231 if (lba48) 232 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 233 /* submit command request */ 234 ide_no_data_taskfile(drive, &args); 235 236 /* if OK, compute maximum address value */ 237 if ((tf->status & 0x01) == 0) 238 addr = ide_get_lba_addr(tf, lba48) + 1; 239 240 return addr; 241} 242 243/* 244 * Sets maximum virtual LBA address of the drive. 245 * Returns new maximum virtual LBA address (> 0) or 0 on failure. 246 */ 247static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) 248{ 249 ide_task_t args; 250 struct ide_taskfile *tf = &args.tf; 251 u64 addr_set = 0; 252 253 addr_req--; 254 /* Create IDE/ATA command request structure */ 255 memset(&args, 0, sizeof(ide_task_t)); 256 tf->lbal = (addr_req >> 0) & 0xff; 257 tf->lbam = (addr_req >>= 8) & 0xff; 258 tf->lbah = (addr_req >>= 8) & 0xff; 259 if (lba48) { 260 tf->hob_lbal = (addr_req >>= 8) & 0xff; 261 tf->hob_lbam = (addr_req >>= 8) & 0xff; 262 tf->hob_lbah = (addr_req >>= 8) & 0xff; 263 tf->command = ATA_CMD_SET_MAX_EXT; 264 } else { 265 tf->device = (addr_req >>= 8) & 0x0f; 266 tf->command = ATA_CMD_SET_MAX; 267 } 268 tf->device |= ATA_LBA; 269 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 270 if (lba48) 271 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 272 /* submit command request */ 273 ide_no_data_taskfile(drive, &args); 274 /* if OK, compute maximum address value */ 275 if ((tf->status & 0x01) == 0) 276 addr_set = ide_get_lba_addr(tf, lba48) + 1; 277 278 return addr_set; 279} 280 281static unsigned long long sectors_to_MB(unsigned long long n) 282{ 283 n <<= 9; /* make it bytes */ 284 do_div(n, 1000000); /* make it MB */ 285 return n; 286} 287 288/* 289 * Some disks report total number of sectors instead of 290 * maximum sector address. We list them here. 291 */ 292static const struct drive_list_entry hpa_list[] = { 293 { "ST340823A", NULL }, 294 { "ST320413A", NULL }, 295 { "ST310211A", NULL }, 296 { NULL, NULL } 297}; 298 299static void idedisk_check_hpa(ide_drive_t *drive) 300{ 301 unsigned long long capacity, set_max; 302 int lba48 = ata_id_lba48_enabled(drive->id); 303 304 capacity = drive->capacity64; 305 306 set_max = idedisk_read_native_max_address(drive, lba48); 307 308 if (ide_in_drive_list(drive->id, hpa_list)) { 309 /* 310 * Since we are inclusive wrt to firmware revisions do this 311 * extra check and apply the workaround only when needed. 312 */ 313 if (set_max == capacity + 1) 314 set_max--; 315 } 316 317 if (set_max <= capacity) 318 return; 319 320 printk(KERN_INFO "%s: Host Protected Area detected.\n" 321 "\tcurrent capacity is %llu sectors (%llu MB)\n" 322 "\tnative capacity is %llu sectors (%llu MB)\n", 323 drive->name, 324 capacity, sectors_to_MB(capacity), 325 set_max, sectors_to_MB(set_max)); 326 327 set_max = idedisk_set_max_address(drive, set_max, lba48); 328 329 if (set_max) { 330 drive->capacity64 = set_max; 331 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 332 drive->name); 333 } 334} 335 336static int ide_disk_get_capacity(ide_drive_t *drive) 337{ 338 u16 *id = drive->id; 339 int lba; 340 341 if (ata_id_lba48_enabled(id)) { 342 /* drive speaks 48-bit LBA */ 343 lba = 1; 344 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 345 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 346 /* drive speaks 28-bit LBA */ 347 lba = 1; 348 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 349 } else { 350 /* drive speaks boring old 28-bit CHS */ 351 lba = 0; 352 drive->capacity64 = drive->cyl * drive->head * drive->sect; 353 } 354 355 if (lba) { 356 drive->dev_flags |= IDE_DFLAG_LBA; 357 358 /* 359 * If this device supports the Host Protected Area feature set, 360 * then we may need to change our opinion about its capacity. 361 */ 362 if (ata_id_hpa_enabled(id)) 363 idedisk_check_hpa(drive); 364 } 365 366 /* limit drive capacity to 137GB if LBA48 cannot be used */ 367 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 368 drive->capacity64 > 1ULL << 28) { 369 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 370 "%llu sectors (%llu MB)\n", 371 drive->name, (unsigned long long)drive->capacity64, 372 sectors_to_MB(drive->capacity64)); 373 drive->capacity64 = 1ULL << 28; 374 } 375 376 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 377 (drive->dev_flags & IDE_DFLAG_LBA48)) { 378 if (drive->capacity64 > 1ULL << 28) { 379 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 380 " will be used for accessing sectors " 381 "> %u\n", drive->name, 1 << 28); 382 } else 383 drive->dev_flags &= ~IDE_DFLAG_LBA48; 384 } 385 386 return 0; 387} 388 389static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 390{ 391 ide_drive_t *drive = q->queuedata; 392 ide_task_t *task = kmalloc(sizeof(*task), GFP_ATOMIC); 393 394 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 395 BUG_ON(task == NULL); 396 397 memset(task, 0, sizeof(*task)); 398 if (ata_id_flush_ext_enabled(drive->id) && 399 (drive->capacity64 >= (1UL << 28))) 400 task->tf.command = ATA_CMD_FLUSH_EXT; 401 else 402 task->tf.command = ATA_CMD_FLUSH; 403 task->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE | 404 IDE_TFLAG_DYN; 405 task->data_phase = TASKFILE_NO_DATA; 406 407 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 408 rq->cmd_flags |= REQ_SOFTBARRIER; 409 rq->special = task; 410} 411 412ide_devset_get(multcount, mult_count); 413 414/* 415 * This is tightly woven into the driver->do_special can not touch. 416 * DON'T do it again until a total personality rewrite is committed. 417 */ 418static int set_multcount(ide_drive_t *drive, int arg) 419{ 420 struct request *rq; 421 int error; 422 423 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 424 return -EINVAL; 425 426 if (drive->special.b.set_multmode) 427 return -EBUSY; 428 429 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 430 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 431 432 drive->mult_req = arg; 433 drive->special.b.set_multmode = 1; 434 error = blk_execute_rq(drive->queue, NULL, rq, 0); 435 blk_put_request(rq); 436 437 return (drive->mult_count == arg) ? 0 : -EIO; 438} 439 440ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 441 442static int set_nowerr(ide_drive_t *drive, int arg) 443{ 444 if (arg < 0 || arg > 1) 445 return -EINVAL; 446 447 if (arg) 448 drive->dev_flags |= IDE_DFLAG_NOWERR; 449 else 450 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 451 452 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 453 454 return 0; 455} 456 457static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 458{ 459 ide_task_t task; 460 461 memset(&task, 0, sizeof(task)); 462 task.tf.feature = feature; 463 task.tf.nsect = nsect; 464 task.tf.command = ATA_CMD_SET_FEATURES; 465 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 466 467 return ide_no_data_taskfile(drive, &task); 468} 469 470static void update_ordered(ide_drive_t *drive) 471{ 472 u16 *id = drive->id; 473 unsigned ordered = QUEUE_ORDERED_NONE; 474 prepare_flush_fn *prep_fn = NULL; 475 476 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 477 unsigned long long capacity; 478 int barrier; 479 /* 480 * We must avoid issuing commands a drive does not 481 * understand or we may crash it. We check flush cache 482 * is supported. We also check we have the LBA48 flush 483 * cache if the drive capacity is too large. By this 484 * time we have trimmed the drive capacity if LBA48 is 485 * not available so we don't need to recheck that. 486 */ 487 capacity = ide_gd_capacity(drive); 488 barrier = ata_id_flush_enabled(id) && 489 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 490 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 491 capacity <= (1ULL << 28) || 492 ata_id_flush_ext_enabled(id)); 493 494 printk(KERN_INFO "%s: cache flushes %ssupported\n", 495 drive->name, barrier ? "" : "not "); 496 497 if (barrier) { 498 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 499 prep_fn = idedisk_prepare_flush; 500 } 501 } else 502 ordered = QUEUE_ORDERED_DRAIN; 503 504 blk_queue_ordered(drive->queue, ordered, prep_fn); 505} 506 507ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 508 509static int set_wcache(ide_drive_t *drive, int arg) 510{ 511 int err = 1; 512 513 if (arg < 0 || arg > 1) 514 return -EINVAL; 515 516 if (ata_id_flush_enabled(drive->id)) { 517 err = ide_do_setfeature(drive, 518 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 519 if (err == 0) { 520 if (arg) 521 drive->dev_flags |= IDE_DFLAG_WCACHE; 522 else 523 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 524 } 525 } 526 527 update_ordered(drive); 528 529 return err; 530} 531 532static int do_idedisk_flushcache(ide_drive_t *drive) 533{ 534 ide_task_t args; 535 536 memset(&args, 0, sizeof(ide_task_t)); 537 if (ata_id_flush_ext_enabled(drive->id)) 538 args.tf.command = ATA_CMD_FLUSH_EXT; 539 else 540 args.tf.command = ATA_CMD_FLUSH; 541 args.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 542 return ide_no_data_taskfile(drive, &args); 543} 544 545ide_devset_get(acoustic, acoustic); 546 547static int set_acoustic(ide_drive_t *drive, int arg) 548{ 549 if (arg < 0 || arg > 254) 550 return -EINVAL; 551 552 ide_do_setfeature(drive, 553 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 554 555 drive->acoustic = arg; 556 557 return 0; 558} 559 560ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 561 562/* 563 * drive->addressing: 564 * 0: 28-bit 565 * 1: 48-bit 566 * 2: 48-bit capable doing 28-bit 567 */ 568static int set_addressing(ide_drive_t *drive, int arg) 569{ 570 if (arg < 0 || arg > 2) 571 return -EINVAL; 572 573 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 574 ata_id_lba48_enabled(drive->id) == 0)) 575 return -EIO; 576 577 if (arg == 2) 578 arg = 0; 579 580 if (arg) 581 drive->dev_flags |= IDE_DFLAG_LBA48; 582 else 583 drive->dev_flags &= ~IDE_DFLAG_LBA48; 584 585 return 0; 586} 587 588ide_ext_devset_rw(acoustic, acoustic); 589ide_ext_devset_rw(address, addressing); 590ide_ext_devset_rw(multcount, multcount); 591ide_ext_devset_rw(wcache, wcache); 592 593ide_ext_devset_rw_sync(nowerr, nowerr); 594 595static int ide_disk_check(ide_drive_t *drive, const char *s) 596{ 597 return 1; 598} 599 600static void ide_disk_setup(ide_drive_t *drive) 601{ 602 struct ide_disk_obj *idkp = drive->driver_data; 603 ide_hwif_t *hwif = drive->hwif; 604 u16 *id = drive->id; 605 char *m = (char *)&id[ATA_ID_PROD]; 606 unsigned long long capacity; 607 608 ide_proc_register_driver(drive, idkp->driver); 609 610 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 611 return; 612 613 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 614 /* 615 * Removable disks (eg. SYQUEST); ignore 'WD' drives 616 */ 617 if (m[0] != 'W' || m[1] != 'D') 618 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 619 } 620 621 (void)set_addressing(drive, 1); 622 623 if (drive->dev_flags & IDE_DFLAG_LBA48) { 624 int max_s = 2048; 625 626 if (max_s > hwif->rqsize) 627 max_s = hwif->rqsize; 628 629 blk_queue_max_sectors(drive->queue, max_s); 630 } 631 632 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 633 drive->queue->max_sectors / 2); 634 635 /* calculate drive capacity, and select LBA if possible */ 636 ide_disk_get_capacity(drive); 637 638 /* 639 * if possible, give fdisk access to more of the drive, 640 * by correcting bios_cyls: 641 */ 642 capacity = ide_gd_capacity(drive); 643 644 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 645 if (ata_id_lba48_enabled(drive->id)) { 646 /* compatibility */ 647 drive->bios_sect = 63; 648 drive->bios_head = 255; 649 } 650 651 if (drive->bios_sect && drive->bios_head) { 652 unsigned int cap0 = capacity; /* truncate to 32 bits */ 653 unsigned int cylsz, cyl; 654 655 if (cap0 != capacity) 656 drive->bios_cyl = 65535; 657 else { 658 cylsz = drive->bios_sect * drive->bios_head; 659 cyl = cap0 / cylsz; 660 if (cyl > 65535) 661 cyl = 65535; 662 if (cyl > drive->bios_cyl) 663 drive->bios_cyl = cyl; 664 } 665 } 666 } 667 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 668 drive->name, capacity, sectors_to_MB(capacity)); 669 670 /* Only print cache size when it was specified */ 671 if (id[ATA_ID_BUF_SIZE]) 672 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 673 674 printk(KERN_CONT ", CHS=%d/%d/%d\n", 675 drive->bios_cyl, drive->bios_head, drive->bios_sect); 676 677 /* write cache enabled? */ 678 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 679 drive->dev_flags |= IDE_DFLAG_WCACHE; 680 681 set_wcache(drive, 1); 682 683 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 684 (drive->head == 0 || drive->head > 16)) { 685 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 686 drive->name, drive->head); 687 drive->dev_flags &= ~IDE_DFLAG_ATTACH; 688 } else 689 drive->dev_flags |= IDE_DFLAG_ATTACH; 690} 691 692static void ide_disk_flush(ide_drive_t *drive) 693{ 694 if (ata_id_flush_enabled(drive->id) == 0 || 695 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 696 return; 697 698 if (do_idedisk_flushcache(drive)) 699 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 700} 701 702static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 703{ 704 return 0; 705} 706 707static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 708 int on) 709{ 710 ide_task_t task; 711 int ret; 712 713 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 714 return 0; 715 716 memset(&task, 0, sizeof(task)); 717 task.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 718 task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 719 720 ret = ide_no_data_taskfile(drive, &task); 721 722 if (ret) 723 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 724 725 return ret; 726} 727 728const struct ide_disk_ops ide_ata_disk_ops = { 729 .check = ide_disk_check, 730 .get_capacity = ide_disk_get_capacity, 731 .setup = ide_disk_setup, 732 .flush = ide_disk_flush, 733 .init_media = ide_disk_init_media, 734 .set_doorlock = ide_disk_set_doorlock, 735 .do_request = ide_do_rw_disk, 736 .end_request = ide_end_request, 737 .ioctl = ide_disk_ioctl, 738}; 739