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 32#include <asm/byteorder.h> 33#include <asm/irq.h> 34#include <asm/uaccess.h> 35#include <asm/io.h> 36#include <asm/div64.h> 37 38#include "ide-disk.h" 39 40static const u8 ide_rw_cmds[] = { 41 ATA_CMD_READ_MULTI, 42 ATA_CMD_WRITE_MULTI, 43 ATA_CMD_READ_MULTI_EXT, 44 ATA_CMD_WRITE_MULTI_EXT, 45 ATA_CMD_PIO_READ, 46 ATA_CMD_PIO_WRITE, 47 ATA_CMD_PIO_READ_EXT, 48 ATA_CMD_PIO_WRITE_EXT, 49 ATA_CMD_READ, 50 ATA_CMD_WRITE, 51 ATA_CMD_READ_EXT, 52 ATA_CMD_WRITE_EXT, 53}; 54 55static void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma) 56{ 57 u8 index, lba48, write; 58 59 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; 60 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; 61 62 if (dma) { 63 cmd->protocol = ATA_PROT_DMA; 64 index = 8; 65 } else { 66 cmd->protocol = ATA_PROT_PIO; 67 if (drive->mult_count) { 68 cmd->tf_flags |= IDE_TFLAG_MULTI_PIO; 69 index = 0; 70 } else 71 index = 4; 72 } 73 74 cmd->tf.command = ide_rw_cmds[index + lba48 + write]; 75} 76 77/* 78 * __ide_do_rw_disk() issues READ and WRITE commands to a disk, 79 * using LBA if supported, or CHS otherwise, to address sectors. 80 */ 81static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 82 sector_t block) 83{ 84 ide_hwif_t *hwif = drive->hwif; 85 u16 nsectors = (u16)blk_rq_sectors(rq); 86 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); 87 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 88 struct ide_cmd cmd; 89 struct ide_taskfile *tf = &cmd.tf; 90 ide_startstop_t rc; 91 92 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { 93 if (block + blk_rq_sectors(rq) > 1ULL << 28) 94 dma = 0; 95 else 96 lba48 = 0; 97 } 98 99 memset(&cmd, 0, sizeof(cmd)); 100 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 101 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 102 103 if (drive->dev_flags & IDE_DFLAG_LBA) { 104 if (lba48) { 105 pr_debug("%s: LBA=0x%012llx\n", drive->name, 106 (unsigned long long)block); 107 108 tf->nsect = nsectors & 0xff; 109 tf->lbal = (u8) block; 110 tf->lbam = (u8)(block >> 8); 111 tf->lbah = (u8)(block >> 16); 112 tf->device = ATA_LBA; 113 114 tf = &cmd.hob; 115 tf->nsect = (nsectors >> 8) & 0xff; 116 tf->lbal = (u8)(block >> 24); 117 if (sizeof(block) != 4) { 118 tf->lbam = (u8)((u64)block >> 32); 119 tf->lbah = (u8)((u64)block >> 40); 120 } 121 122 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 123 cmd.valid.in.hob = IDE_VALID_IN_HOB; 124 cmd.tf_flags |= IDE_TFLAG_LBA48; 125 } else { 126 tf->nsect = nsectors & 0xff; 127 tf->lbal = block; 128 tf->lbam = block >>= 8; 129 tf->lbah = block >>= 8; 130 tf->device = ((block >> 8) & 0xf) | ATA_LBA; 131 } 132 } else { 133 unsigned int sect, head, cyl, track; 134 135 track = (int)block / drive->sect; 136 sect = (int)block % drive->sect + 1; 137 head = track % drive->head; 138 cyl = track / drive->head; 139 140 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); 141 142 tf->nsect = nsectors & 0xff; 143 tf->lbal = sect; 144 tf->lbam = cyl; 145 tf->lbah = cyl >> 8; 146 tf->device = head; 147 } 148 149 cmd.tf_flags |= IDE_TFLAG_FS; 150 151 if (rq_data_dir(rq)) 152 cmd.tf_flags |= IDE_TFLAG_WRITE; 153 154 ide_tf_set_cmd(drive, &cmd, dma); 155 cmd.rq = rq; 156 157 if (dma == 0) { 158 ide_init_sg_cmd(&cmd, nsectors << 9); 159 ide_map_sg(drive, &cmd); 160 } 161 162 rc = do_rw_taskfile(drive, &cmd); 163 164 if (rc == ide_stopped && dma) { 165 /* fallback to PIO */ 166 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 167 ide_tf_set_cmd(drive, &cmd, 0); 168 ide_init_sg_cmd(&cmd, nsectors << 9); 169 rc = do_rw_taskfile(drive, &cmd); 170 } 171 172 return rc; 173} 174 175/* 176 * 268435455 == 137439 MB or 28bit limit 177 * 320173056 == 163929 MB or 48bit addressing 178 * 1073741822 == 549756 MB or 48bit addressing fake drive 179 */ 180 181static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 182 sector_t block) 183{ 184 ide_hwif_t *hwif = drive->hwif; 185 186 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 187 BUG_ON(rq->cmd_type != REQ_TYPE_FS); 188 189 ledtrig_ide_activity(); 190 191 pr_debug("%s: %sing: block=%llu, sectors=%u, buffer=0x%08lx\n", 192 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 193 (unsigned long long)block, blk_rq_sectors(rq), 194 (unsigned long)rq->buffer); 195 196 if (hwif->rw_disk) 197 hwif->rw_disk(drive, rq); 198 199 return __ide_do_rw_disk(drive, rq, block); 200} 201 202/* 203 * Queries for true maximum capacity of the drive. 204 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 205 */ 206static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 207{ 208 struct ide_cmd cmd; 209 struct ide_taskfile *tf = &cmd.tf; 210 u64 addr = 0; 211 212 memset(&cmd, 0, sizeof(cmd)); 213 if (lba48) 214 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 215 else 216 tf->command = ATA_CMD_READ_NATIVE_MAX; 217 tf->device = ATA_LBA; 218 219 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 220 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 221 if (lba48) { 222 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 223 cmd.valid.in.hob = IDE_VALID_IN_HOB; 224 cmd.tf_flags = IDE_TFLAG_LBA48; 225 } 226 227 ide_no_data_taskfile(drive, &cmd); 228 229 /* if OK, compute maximum address value */ 230 if (!(tf->status & ATA_ERR)) 231 addr = ide_get_lba_addr(&cmd, lba48) + 1; 232 233 return addr; 234} 235 236/* 237 * Sets maximum virtual LBA address of the drive. 238 * Returns new maximum virtual LBA address (> 0) or 0 on failure. 239 */ 240static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) 241{ 242 struct ide_cmd cmd; 243 struct ide_taskfile *tf = &cmd.tf; 244 u64 addr_set = 0; 245 246 addr_req--; 247 248 memset(&cmd, 0, sizeof(cmd)); 249 tf->lbal = (addr_req >> 0) & 0xff; 250 tf->lbam = (addr_req >>= 8) & 0xff; 251 tf->lbah = (addr_req >>= 8) & 0xff; 252 if (lba48) { 253 cmd.hob.lbal = (addr_req >>= 8) & 0xff; 254 cmd.hob.lbam = (addr_req >>= 8) & 0xff; 255 cmd.hob.lbah = (addr_req >>= 8) & 0xff; 256 tf->command = ATA_CMD_SET_MAX_EXT; 257 } else { 258 tf->device = (addr_req >>= 8) & 0x0f; 259 tf->command = ATA_CMD_SET_MAX; 260 } 261 tf->device |= ATA_LBA; 262 263 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 264 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 265 if (lba48) { 266 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 267 cmd.valid.in.hob = IDE_VALID_IN_HOB; 268 cmd.tf_flags = IDE_TFLAG_LBA48; 269 } 270 271 ide_no_data_taskfile(drive, &cmd); 272 273 /* if OK, compute maximum address value */ 274 if (!(tf->status & ATA_ERR)) 275 addr_set = ide_get_lba_addr(&cmd, lba48) + 1; 276 277 return addr_set; 278} 279 280static unsigned long long sectors_to_MB(unsigned long long n) 281{ 282 n <<= 9; /* make it bytes */ 283 do_div(n, 1000000); /* make it MB */ 284 return n; 285} 286 287/* 288 * Some disks report total number of sectors instead of 289 * maximum sector address. We list them here. 290 */ 291static const struct drive_list_entry hpa_list[] = { 292 { "ST340823A", NULL }, 293 { "ST320413A", NULL }, 294 { "ST310211A", NULL }, 295 { NULL, NULL } 296}; 297 298static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48) 299{ 300 u64 capacity, set_max; 301 302 capacity = drive->capacity64; 303 set_max = idedisk_read_native_max_address(drive, lba48); 304 305 if (ide_in_drive_list(drive->id, hpa_list)) { 306 if (set_max == capacity + 1) 307 set_max--; 308 } 309 310 return set_max; 311} 312 313static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48) 314{ 315 set_max = idedisk_set_max_address(drive, set_max, lba48); 316 if (set_max) 317 drive->capacity64 = set_max; 318 319 return set_max; 320} 321 322static void idedisk_check_hpa(ide_drive_t *drive) 323{ 324 u64 capacity, set_max; 325 int lba48 = ata_id_lba48_enabled(drive->id); 326 327 capacity = drive->capacity64; 328 set_max = ide_disk_hpa_get_native_capacity(drive, lba48); 329 330 if (set_max <= capacity) 331 return; 332 333 drive->probed_capacity = set_max; 334 335 printk(KERN_INFO "%s: Host Protected Area detected.\n" 336 "\tcurrent capacity is %llu sectors (%llu MB)\n" 337 "\tnative capacity is %llu sectors (%llu MB)\n", 338 drive->name, 339 capacity, sectors_to_MB(capacity), 340 set_max, sectors_to_MB(set_max)); 341 342 if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0) 343 return; 344 345 set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48); 346 if (set_max) 347 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 348 drive->name); 349} 350 351static int ide_disk_get_capacity(ide_drive_t *drive) 352{ 353 u16 *id = drive->id; 354 int lba; 355 356 if (ata_id_lba48_enabled(id)) { 357 /* drive speaks 48-bit LBA */ 358 lba = 1; 359 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 360 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 361 /* drive speaks 28-bit LBA */ 362 lba = 1; 363 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 364 } else { 365 /* drive speaks boring old 28-bit CHS */ 366 lba = 0; 367 drive->capacity64 = drive->cyl * drive->head * drive->sect; 368 } 369 370 drive->probed_capacity = drive->capacity64; 371 372 if (lba) { 373 drive->dev_flags |= IDE_DFLAG_LBA; 374 375 /* 376 * If this device supports the Host Protected Area feature set, 377 * then we may need to change our opinion about its capacity. 378 */ 379 if (ata_id_hpa_enabled(id)) 380 idedisk_check_hpa(drive); 381 } 382 383 /* limit drive capacity to 137GB if LBA48 cannot be used */ 384 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 385 drive->capacity64 > 1ULL << 28) { 386 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 387 "%llu sectors (%llu MB)\n", 388 drive->name, (unsigned long long)drive->capacity64, 389 sectors_to_MB(drive->capacity64)); 390 drive->probed_capacity = drive->capacity64 = 1ULL << 28; 391 } 392 393 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 394 (drive->dev_flags & IDE_DFLAG_LBA48)) { 395 if (drive->capacity64 > 1ULL << 28) { 396 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 397 " will be used for accessing sectors " 398 "> %u\n", drive->name, 1 << 28); 399 } else 400 drive->dev_flags &= ~IDE_DFLAG_LBA48; 401 } 402 403 return 0; 404} 405 406static void ide_disk_unlock_native_capacity(ide_drive_t *drive) 407{ 408 u16 *id = drive->id; 409 int lba48 = ata_id_lba48_enabled(id); 410 411 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 || 412 ata_id_hpa_enabled(id) == 0) 413 return; 414 415 /* 416 * according to the spec the SET MAX ADDRESS command shall be 417 * immediately preceded by a READ NATIVE MAX ADDRESS command 418 */ 419 if (!ide_disk_hpa_get_native_capacity(drive, lba48)) 420 return; 421 422 if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48)) 423 drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */ 424} 425 426static int idedisk_prep_fn(struct request_queue *q, struct request *rq) 427{ 428 ide_drive_t *drive = q->queuedata; 429 struct ide_cmd *cmd; 430 431 if (!(rq->cmd_flags & REQ_FLUSH)) 432 return BLKPREP_OK; 433 434 cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); 435 436 BUG_ON(cmd == NULL); 437 438 memset(cmd, 0, sizeof(*cmd)); 439 if (ata_id_flush_ext_enabled(drive->id) && 440 (drive->capacity64 >= (1UL << 28))) 441 cmd->tf.command = ATA_CMD_FLUSH_EXT; 442 else 443 cmd->tf.command = ATA_CMD_FLUSH; 444 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 445 cmd->tf_flags = IDE_TFLAG_DYN; 446 cmd->protocol = ATA_PROT_NODATA; 447 448 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 449 rq->special = cmd; 450 cmd->rq = rq; 451 452 return BLKPREP_OK; 453} 454 455ide_devset_get(multcount, mult_count); 456 457/* 458 * This is tightly woven into the driver->do_special can not touch. 459 * DON'T do it again until a total personality rewrite is committed. 460 */ 461static int set_multcount(ide_drive_t *drive, int arg) 462{ 463 struct request *rq; 464 int error; 465 466 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 467 return -EINVAL; 468 469 if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) 470 return -EBUSY; 471 472 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 473 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 474 475 drive->mult_req = arg; 476 drive->special_flags |= IDE_SFLAG_SET_MULTMODE; 477 error = blk_execute_rq(drive->queue, NULL, rq, 0); 478 blk_put_request(rq); 479 480 return (drive->mult_count == arg) ? 0 : -EIO; 481} 482 483ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 484 485static int set_nowerr(ide_drive_t *drive, int arg) 486{ 487 if (arg < 0 || arg > 1) 488 return -EINVAL; 489 490 if (arg) 491 drive->dev_flags |= IDE_DFLAG_NOWERR; 492 else 493 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 494 495 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 496 497 return 0; 498} 499 500static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 501{ 502 struct ide_cmd cmd; 503 504 memset(&cmd, 0, sizeof(cmd)); 505 cmd.tf.feature = feature; 506 cmd.tf.nsect = nsect; 507 cmd.tf.command = ATA_CMD_SET_FEATURES; 508 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 509 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 510 511 return ide_no_data_taskfile(drive, &cmd); 512} 513 514static void update_ordered(ide_drive_t *drive) 515{ 516 u16 *id = drive->id; 517 unsigned ordered = QUEUE_ORDERED_NONE; 518 519 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 520 unsigned long long capacity; 521 int barrier; 522 /* 523 * We must avoid issuing commands a drive does not 524 * understand or we may crash it. We check flush cache 525 * is supported. We also check we have the LBA48 flush 526 * cache if the drive capacity is too large. By this 527 * time we have trimmed the drive capacity if LBA48 is 528 * not available so we don't need to recheck that. 529 */ 530 capacity = ide_gd_capacity(drive); 531 barrier = ata_id_flush_enabled(id) && 532 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 533 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 534 capacity <= (1ULL << 28) || 535 ata_id_flush_ext_enabled(id)); 536 537 printk(KERN_INFO "%s: cache flushes %ssupported\n", 538 drive->name, barrier ? "" : "not "); 539 540 if (barrier) { 541 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 542 blk_queue_prep_rq(drive->queue, idedisk_prep_fn); 543 } 544 } else 545 ordered = QUEUE_ORDERED_DRAIN; 546 547 blk_queue_ordered(drive->queue, ordered); 548} 549 550ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 551 552static int set_wcache(ide_drive_t *drive, int arg) 553{ 554 int err = 1; 555 556 if (arg < 0 || arg > 1) 557 return -EINVAL; 558 559 if (ata_id_flush_enabled(drive->id)) { 560 err = ide_do_setfeature(drive, 561 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 562 if (err == 0) { 563 if (arg) 564 drive->dev_flags |= IDE_DFLAG_WCACHE; 565 else 566 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 567 } 568 } 569 570 update_ordered(drive); 571 572 return err; 573} 574 575static int do_idedisk_flushcache(ide_drive_t *drive) 576{ 577 struct ide_cmd cmd; 578 579 memset(&cmd, 0, sizeof(cmd)); 580 if (ata_id_flush_ext_enabled(drive->id)) 581 cmd.tf.command = ATA_CMD_FLUSH_EXT; 582 else 583 cmd.tf.command = ATA_CMD_FLUSH; 584 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 585 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 586 587 return ide_no_data_taskfile(drive, &cmd); 588} 589 590ide_devset_get(acoustic, acoustic); 591 592static int set_acoustic(ide_drive_t *drive, int arg) 593{ 594 if (arg < 0 || arg > 254) 595 return -EINVAL; 596 597 ide_do_setfeature(drive, 598 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 599 600 drive->acoustic = arg; 601 602 return 0; 603} 604 605ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 606 607/* 608 * drive->addressing: 609 * 0: 28-bit 610 * 1: 48-bit 611 * 2: 48-bit capable doing 28-bit 612 */ 613static int set_addressing(ide_drive_t *drive, int arg) 614{ 615 if (arg < 0 || arg > 2) 616 return -EINVAL; 617 618 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 619 ata_id_lba48_enabled(drive->id) == 0)) 620 return -EIO; 621 622 if (arg == 2) 623 arg = 0; 624 625 if (arg) 626 drive->dev_flags |= IDE_DFLAG_LBA48; 627 else 628 drive->dev_flags &= ~IDE_DFLAG_LBA48; 629 630 return 0; 631} 632 633ide_ext_devset_rw(acoustic, acoustic); 634ide_ext_devset_rw(address, addressing); 635ide_ext_devset_rw(multcount, multcount); 636ide_ext_devset_rw(wcache, wcache); 637 638ide_ext_devset_rw_sync(nowerr, nowerr); 639 640static int ide_disk_check(ide_drive_t *drive, const char *s) 641{ 642 return 1; 643} 644 645static void ide_disk_setup(ide_drive_t *drive) 646{ 647 struct ide_disk_obj *idkp = drive->driver_data; 648 struct request_queue *q = drive->queue; 649 ide_hwif_t *hwif = drive->hwif; 650 u16 *id = drive->id; 651 char *m = (char *)&id[ATA_ID_PROD]; 652 unsigned long long capacity; 653 654 ide_proc_register_driver(drive, idkp->driver); 655 656 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 657 return; 658 659 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 660 /* 661 * Removable disks (eg. SYQUEST); ignore 'WD' drives 662 */ 663 if (m[0] != 'W' || m[1] != 'D') 664 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 665 } 666 667 (void)set_addressing(drive, 1); 668 669 if (drive->dev_flags & IDE_DFLAG_LBA48) { 670 int max_s = 2048; 671 672 if (max_s > hwif->rqsize) 673 max_s = hwif->rqsize; 674 675 blk_queue_max_hw_sectors(q, max_s); 676 } 677 678 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 679 queue_max_sectors(q) / 2); 680 681 if (ata_id_is_ssd(id)) 682 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); 683 684 /* calculate drive capacity, and select LBA if possible */ 685 ide_disk_get_capacity(drive); 686 687 /* 688 * if possible, give fdisk access to more of the drive, 689 * by correcting bios_cyls: 690 */ 691 capacity = ide_gd_capacity(drive); 692 693 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 694 if (ata_id_lba48_enabled(drive->id)) { 695 /* compatibility */ 696 drive->bios_sect = 63; 697 drive->bios_head = 255; 698 } 699 700 if (drive->bios_sect && drive->bios_head) { 701 unsigned int cap0 = capacity; /* truncate to 32 bits */ 702 unsigned int cylsz, cyl; 703 704 if (cap0 != capacity) 705 drive->bios_cyl = 65535; 706 else { 707 cylsz = drive->bios_sect * drive->bios_head; 708 cyl = cap0 / cylsz; 709 if (cyl > 65535) 710 cyl = 65535; 711 if (cyl > drive->bios_cyl) 712 drive->bios_cyl = cyl; 713 } 714 } 715 } 716 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 717 drive->name, capacity, sectors_to_MB(capacity)); 718 719 /* Only print cache size when it was specified */ 720 if (id[ATA_ID_BUF_SIZE]) 721 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 722 723 printk(KERN_CONT ", CHS=%d/%d/%d\n", 724 drive->bios_cyl, drive->bios_head, drive->bios_sect); 725 726 /* write cache enabled? */ 727 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 728 drive->dev_flags |= IDE_DFLAG_WCACHE; 729 730 set_wcache(drive, 1); 731 732 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 733 (drive->head == 0 || drive->head > 16)) { 734 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 735 drive->name, drive->head); 736 drive->dev_flags &= ~IDE_DFLAG_ATTACH; 737 } else 738 drive->dev_flags |= IDE_DFLAG_ATTACH; 739} 740 741static void ide_disk_flush(ide_drive_t *drive) 742{ 743 if (ata_id_flush_enabled(drive->id) == 0 || 744 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 745 return; 746 747 if (do_idedisk_flushcache(drive)) 748 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 749} 750 751static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 752{ 753 return 0; 754} 755 756static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 757 int on) 758{ 759 struct ide_cmd cmd; 760 int ret; 761 762 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 763 return 0; 764 765 memset(&cmd, 0, sizeof(cmd)); 766 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 767 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 768 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 769 770 ret = ide_no_data_taskfile(drive, &cmd); 771 772 if (ret) 773 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 774 775 return ret; 776} 777 778const struct ide_disk_ops ide_ata_disk_ops = { 779 .check = ide_disk_check, 780 .unlock_native_capacity = ide_disk_unlock_native_capacity, 781 .get_capacity = ide_disk_get_capacity, 782 .setup = ide_disk_setup, 783 .flush = ide_disk_flush, 784 .init_media = ide_disk_init_media, 785 .set_doorlock = ide_disk_set_doorlock, 786 .do_request = ide_do_rw_disk, 787 .ioctl = ide_disk_ioctl, 788}; 789