1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) 4 * Copyright (C) 1998-2002 Linux ATA Development 5 * Andre Hedrick <andre@linux-ide.org> 6 * Copyright (C) 2003 Red Hat 7 * Copyright (C) 2003-2005, 2007 Bartlomiej Zolnierkiewicz 8 */ 9 10/* 11 * Mostly written by Mark Lord <mlord@pobox.com> 12 * and Gadi Oxman <gadio@netvision.net.il> 13 * and Andre Hedrick <andre@linux-ide.org> 14 * 15 * This is the IDE/ATA disk driver, as evolved from hd.c and ide.c. 16 */ 17 18#include <linux/types.h> 19#include <linux/string.h> 20#include <linux/kernel.h> 21#include <linux/timer.h> 22#include <linux/mm.h> 23#include <linux/interrupt.h> 24#include <linux/major.h> 25#include <linux/errno.h> 26#include <linux/genhd.h> 27#include <linux/slab.h> 28#include <linux/delay.h> 29#include <linux/mutex.h> 30#include <linux/leds.h> 31#include <linux/ide.h> 32 33#include <asm/byteorder.h> 34#include <asm/irq.h> 35#include <linux/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 void ide_tf_set_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 dma) 57{ 58 u8 index, lba48, write; 59 60 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; 61 write = (cmd->tf_flags & IDE_TFLAG_WRITE) ? 1 : 0; 62 63 if (dma) { 64 cmd->protocol = ATA_PROT_DMA; 65 index = 8; 66 } else { 67 cmd->protocol = ATA_PROT_PIO; 68 if (drive->mult_count) { 69 cmd->tf_flags |= IDE_TFLAG_MULTI_PIO; 70 index = 0; 71 } else 72 index = 4; 73 } 74 75 cmd->tf.command = ide_rw_cmds[index + lba48 + write]; 76} 77 78/* 79 * __ide_do_rw_disk() issues READ and WRITE commands to a disk, 80 * using LBA if supported, or CHS otherwise, to address sectors. 81 */ 82static ide_startstop_t __ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 83 sector_t block) 84{ 85 ide_hwif_t *hwif = drive->hwif; 86 u16 nsectors = (u16)blk_rq_sectors(rq); 87 u8 lba48 = !!(drive->dev_flags & IDE_DFLAG_LBA48); 88 u8 dma = !!(drive->dev_flags & IDE_DFLAG_USING_DMA); 89 struct ide_cmd cmd; 90 struct ide_taskfile *tf = &cmd.tf; 91 ide_startstop_t rc; 92 93 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && lba48 && dma) { 94 if (block + blk_rq_sectors(rq) > 1ULL << 28) 95 dma = 0; 96 else 97 lba48 = 0; 98 } 99 100 memset(&cmd, 0, sizeof(cmd)); 101 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 102 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 103 104 if (drive->dev_flags & IDE_DFLAG_LBA) { 105 if (lba48) { 106 pr_debug("%s: LBA=0x%012llx\n", drive->name, 107 (unsigned long long)block); 108 109 tf->nsect = nsectors & 0xff; 110 tf->lbal = (u8) block; 111 tf->lbam = (u8)(block >> 8); 112 tf->lbah = (u8)(block >> 16); 113 tf->device = ATA_LBA; 114 115 tf = &cmd.hob; 116 tf->nsect = (nsectors >> 8) & 0xff; 117 tf->lbal = (u8)(block >> 24); 118 if (sizeof(block) != 4) { 119 tf->lbam = (u8)((u64)block >> 32); 120 tf->lbah = (u8)((u64)block >> 40); 121 } 122 123 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 124 cmd.valid.in.hob = IDE_VALID_IN_HOB; 125 cmd.tf_flags |= IDE_TFLAG_LBA48; 126 } else { 127 tf->nsect = nsectors & 0xff; 128 tf->lbal = block; 129 tf->lbam = block >>= 8; 130 tf->lbah = block >>= 8; 131 tf->device = ((block >> 8) & 0xf) | ATA_LBA; 132 } 133 } else { 134 unsigned int sect, head, cyl, track; 135 136 track = (int)block / drive->sect; 137 sect = (int)block % drive->sect + 1; 138 head = track % drive->head; 139 cyl = track / drive->head; 140 141 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); 142 143 tf->nsect = nsectors & 0xff; 144 tf->lbal = sect; 145 tf->lbam = cyl; 146 tf->lbah = cyl >> 8; 147 tf->device = head; 148 } 149 150 cmd.tf_flags |= IDE_TFLAG_FS; 151 152 if (rq_data_dir(rq)) 153 cmd.tf_flags |= IDE_TFLAG_WRITE; 154 155 ide_tf_set_cmd(drive, &cmd, dma); 156 cmd.rq = rq; 157 158 if (dma == 0) { 159 ide_init_sg_cmd(&cmd, nsectors << 9); 160 ide_map_sg(drive, &cmd); 161 } 162 163 rc = do_rw_taskfile(drive, &cmd); 164 165 if (rc == ide_stopped && dma) { 166 /* fallback to PIO */ 167 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 168 ide_tf_set_cmd(drive, &cmd, 0); 169 ide_init_sg_cmd(&cmd, nsectors << 9); 170 rc = do_rw_taskfile(drive, &cmd); 171 } 172 173 return rc; 174} 175 176/* 177 * 268435455 == 137439 MB or 28bit limit 178 * 320173056 == 163929 MB or 48bit addressing 179 * 1073741822 == 549756 MB or 48bit addressing fake drive 180 */ 181 182static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 183 sector_t block) 184{ 185 ide_hwif_t *hwif = drive->hwif; 186 187 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 188 BUG_ON(blk_rq_is_passthrough(rq)); 189 190 ledtrig_disk_activity(rq_data_dir(rq) == WRITE); 191 192 pr_debug("%s: %sing: block=%llu, sectors=%u\n", 193 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 194 (unsigned long long)block, blk_rq_sectors(rq)); 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 /* 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 return set_max; 315} 316 317static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48) 318{ 319 set_max = idedisk_set_max_address(drive, set_max, lba48); 320 if (set_max) 321 drive->capacity64 = set_max; 322 323 return set_max; 324} 325 326static void idedisk_check_hpa(ide_drive_t *drive) 327{ 328 u64 capacity, set_max; 329 int lba48 = ata_id_lba48_enabled(drive->id); 330 331 capacity = drive->capacity64; 332 set_max = ide_disk_hpa_get_native_capacity(drive, lba48); 333 334 if (set_max <= capacity) 335 return; 336 337 drive->probed_capacity = set_max; 338 339 printk(KERN_INFO "%s: Host Protected Area detected.\n" 340 "\tcurrent capacity is %llu sectors (%llu MB)\n" 341 "\tnative capacity is %llu sectors (%llu MB)\n", 342 drive->name, 343 capacity, sectors_to_MB(capacity), 344 set_max, sectors_to_MB(set_max)); 345 346 if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0) 347 return; 348 349 set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48); 350 if (set_max) 351 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 352 drive->name); 353} 354 355static int ide_disk_get_capacity(ide_drive_t *drive) 356{ 357 u16 *id = drive->id; 358 int lba; 359 360 if (ata_id_lba48_enabled(id)) { 361 /* drive speaks 48-bit LBA */ 362 lba = 1; 363 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 364 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 365 /* drive speaks 28-bit LBA */ 366 lba = 1; 367 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 368 } else { 369 /* drive speaks boring old 28-bit CHS */ 370 lba = 0; 371 drive->capacity64 = drive->cyl * drive->head * drive->sect; 372 } 373 374 drive->probed_capacity = drive->capacity64; 375 376 if (lba) { 377 drive->dev_flags |= IDE_DFLAG_LBA; 378 379 /* 380 * If this device supports the Host Protected Area feature set, 381 * then we may need to change our opinion about its capacity. 382 */ 383 if (ata_id_hpa_enabled(id)) 384 idedisk_check_hpa(drive); 385 } 386 387 /* limit drive capacity to 137GB if LBA48 cannot be used */ 388 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 389 drive->capacity64 > 1ULL << 28) { 390 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 391 "%llu sectors (%llu MB)\n", 392 drive->name, (unsigned long long)drive->capacity64, 393 sectors_to_MB(drive->capacity64)); 394 drive->probed_capacity = drive->capacity64 = 1ULL << 28; 395 } 396 397 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 398 (drive->dev_flags & IDE_DFLAG_LBA48)) { 399 if (drive->capacity64 > 1ULL << 28) { 400 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 401 " will be used for accessing sectors " 402 "> %u\n", drive->name, 1 << 28); 403 } else 404 drive->dev_flags &= ~IDE_DFLAG_LBA48; 405 } 406 407 return 0; 408} 409 410static void ide_disk_unlock_native_capacity(ide_drive_t *drive) 411{ 412 u16 *id = drive->id; 413 int lba48 = ata_id_lba48_enabled(id); 414 415 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 || 416 ata_id_hpa_enabled(id) == 0) 417 return; 418 419 /* 420 * according to the spec the SET MAX ADDRESS command shall be 421 * immediately preceded by a READ NATIVE MAX ADDRESS command 422 */ 423 if (!ide_disk_hpa_get_native_capacity(drive, lba48)) 424 return; 425 426 if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48)) 427 drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */ 428} 429 430static bool idedisk_prep_rq(ide_drive_t *drive, struct request *rq) 431{ 432 struct ide_cmd *cmd; 433 434 if (req_op(rq) != REQ_OP_FLUSH) 435 return true; 436 437 if (ide_req(rq)->special) { 438 cmd = ide_req(rq)->special; 439 memset(cmd, 0, sizeof(*cmd)); 440 } else { 441 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 442 } 443 444 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 445 BUG_ON(cmd == NULL); 446 447 if (ata_id_flush_ext_enabled(drive->id) && 448 (drive->capacity64 >= (1UL << 28))) 449 cmd->tf.command = ATA_CMD_FLUSH_EXT; 450 else 451 cmd->tf.command = ATA_CMD_FLUSH; 452 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 453 cmd->tf_flags = IDE_TFLAG_DYN; 454 cmd->protocol = ATA_PROT_NODATA; 455 rq->cmd_flags &= ~REQ_OP_MASK; 456 rq->cmd_flags |= REQ_OP_DRV_OUT; 457 ide_req(rq)->type = ATA_PRIV_TASKFILE; 458 ide_req(rq)->special = cmd; 459 cmd->rq = rq; 460 461 return true; 462} 463 464ide_devset_get(multcount, mult_count); 465 466/* 467 * This is tightly woven into the driver->do_special can not touch. 468 * DON'T do it again until a total personality rewrite is committed. 469 */ 470static int set_multcount(ide_drive_t *drive, int arg) 471{ 472 struct request *rq; 473 474 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 475 return -EINVAL; 476 477 if (drive->special_flags & IDE_SFLAG_SET_MULTMODE) 478 return -EBUSY; 479 480 rq = blk_get_request(drive->queue, REQ_OP_DRV_IN, 0); 481 ide_req(rq)->type = ATA_PRIV_TASKFILE; 482 483 drive->mult_req = arg; 484 drive->special_flags |= IDE_SFLAG_SET_MULTMODE; 485 blk_execute_rq(drive->queue, NULL, rq, 0); 486 blk_put_request(rq); 487 488 return (drive->mult_count == arg) ? 0 : -EIO; 489} 490 491ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 492 493static int set_nowerr(ide_drive_t *drive, int arg) 494{ 495 if (arg < 0 || arg > 1) 496 return -EINVAL; 497 498 if (arg) 499 drive->dev_flags |= IDE_DFLAG_NOWERR; 500 else 501 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 502 503 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 504 505 return 0; 506} 507 508static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 509{ 510 struct ide_cmd cmd; 511 512 memset(&cmd, 0, sizeof(cmd)); 513 cmd.tf.feature = feature; 514 cmd.tf.nsect = nsect; 515 cmd.tf.command = ATA_CMD_SET_FEATURES; 516 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 517 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 518 519 return ide_no_data_taskfile(drive, &cmd); 520} 521 522static void update_flush(ide_drive_t *drive) 523{ 524 u16 *id = drive->id; 525 bool wc = false; 526 527 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 528 unsigned long long capacity; 529 int barrier; 530 /* 531 * We must avoid issuing commands a drive does not 532 * understand or we may crash it. We check flush cache 533 * is supported. We also check we have the LBA48 flush 534 * cache if the drive capacity is too large. By this 535 * time we have trimmed the drive capacity if LBA48 is 536 * not available so we don't need to recheck that. 537 */ 538 capacity = ide_gd_capacity(drive); 539 barrier = ata_id_flush_enabled(id) && 540 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 541 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 542 capacity <= (1ULL << 28) || 543 ata_id_flush_ext_enabled(id)); 544 545 printk(KERN_INFO "%s: cache flushes %ssupported\n", 546 drive->name, barrier ? "" : "not "); 547 548 if (barrier) { 549 wc = true; 550 drive->prep_rq = idedisk_prep_rq; 551 } 552 } 553 554 blk_queue_write_cache(drive->queue, wc, false); 555} 556 557ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 558 559static int set_wcache(ide_drive_t *drive, int arg) 560{ 561 int err = 1; 562 563 if (arg < 0 || arg > 1) 564 return -EINVAL; 565 566 if (ata_id_flush_enabled(drive->id)) { 567 err = ide_do_setfeature(drive, 568 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 569 if (err == 0) { 570 if (arg) 571 drive->dev_flags |= IDE_DFLAG_WCACHE; 572 else 573 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 574 } 575 } 576 577 update_flush(drive); 578 579 return err; 580} 581 582static int do_idedisk_flushcache(ide_drive_t *drive) 583{ 584 struct ide_cmd cmd; 585 586 memset(&cmd, 0, sizeof(cmd)); 587 if (ata_id_flush_ext_enabled(drive->id)) 588 cmd.tf.command = ATA_CMD_FLUSH_EXT; 589 else 590 cmd.tf.command = ATA_CMD_FLUSH; 591 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 592 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 593 594 return ide_no_data_taskfile(drive, &cmd); 595} 596 597ide_devset_get(acoustic, acoustic); 598 599static int set_acoustic(ide_drive_t *drive, int arg) 600{ 601 if (arg < 0 || arg > 254) 602 return -EINVAL; 603 604 ide_do_setfeature(drive, 605 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 606 607 drive->acoustic = arg; 608 609 return 0; 610} 611 612ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 613 614/* 615 * drive->addressing: 616 * 0: 28-bit 617 * 1: 48-bit 618 * 2: 48-bit capable doing 28-bit 619 */ 620static int set_addressing(ide_drive_t *drive, int arg) 621{ 622 if (arg < 0 || arg > 2) 623 return -EINVAL; 624 625 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 626 ata_id_lba48_enabled(drive->id) == 0)) 627 return -EIO; 628 629 if (arg == 2) 630 arg = 0; 631 632 if (arg) 633 drive->dev_flags |= IDE_DFLAG_LBA48; 634 else 635 drive->dev_flags &= ~IDE_DFLAG_LBA48; 636 637 return 0; 638} 639 640ide_ext_devset_rw(acoustic, acoustic); 641ide_ext_devset_rw(address, addressing); 642ide_ext_devset_rw(multcount, multcount); 643ide_ext_devset_rw(wcache, wcache); 644 645ide_ext_devset_rw_sync(nowerr, nowerr); 646 647static int ide_disk_check(ide_drive_t *drive, const char *s) 648{ 649 return 1; 650} 651 652static void ide_disk_setup(ide_drive_t *drive) 653{ 654 struct ide_disk_obj *idkp = drive->driver_data; 655 struct request_queue *q = drive->queue; 656 ide_hwif_t *hwif = drive->hwif; 657 u16 *id = drive->id; 658 char *m = (char *)&id[ATA_ID_PROD]; 659 unsigned long long capacity; 660 661 ide_proc_register_driver(drive, idkp->driver); 662 663 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 664 return; 665 666 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 667 /* 668 * Removable disks (eg. SYQUEST); ignore 'WD' drives 669 */ 670 if (m[0] != 'W' || m[1] != 'D') 671 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 672 } 673 674 (void)set_addressing(drive, 1); 675 676 if (drive->dev_flags & IDE_DFLAG_LBA48) { 677 int max_s = 2048; 678 679 if (max_s > hwif->rqsize) 680 max_s = hwif->rqsize; 681 682 blk_queue_max_hw_sectors(q, max_s); 683 } 684 685 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 686 queue_max_sectors(q) / 2); 687 688 if (ata_id_is_ssd(id)) { 689 blk_queue_flag_set(QUEUE_FLAG_NONROT, q); 690 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, q); 691 } 692 693 /* calculate drive capacity, and select LBA if possible */ 694 ide_disk_get_capacity(drive); 695 696 /* 697 * if possible, give fdisk access to more of the drive, 698 * by correcting bios_cyls: 699 */ 700 capacity = ide_gd_capacity(drive); 701 702 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 703 if (ata_id_lba48_enabled(drive->id)) { 704 /* compatibility */ 705 drive->bios_sect = 63; 706 drive->bios_head = 255; 707 } 708 709 if (drive->bios_sect && drive->bios_head) { 710 unsigned int cap0 = capacity; /* truncate to 32 bits */ 711 unsigned int cylsz, cyl; 712 713 if (cap0 != capacity) 714 drive->bios_cyl = 65535; 715 else { 716 cylsz = drive->bios_sect * drive->bios_head; 717 cyl = cap0 / cylsz; 718 if (cyl > 65535) 719 cyl = 65535; 720 if (cyl > drive->bios_cyl) 721 drive->bios_cyl = cyl; 722 } 723 } 724 } 725 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 726 drive->name, capacity, sectors_to_MB(capacity)); 727 728 /* Only print cache size when it was specified */ 729 if (id[ATA_ID_BUF_SIZE]) 730 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 731 732 printk(KERN_CONT ", CHS=%d/%d/%d\n", 733 drive->bios_cyl, drive->bios_head, drive->bios_sect); 734 735 /* write cache enabled? */ 736 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 737 drive->dev_flags |= IDE_DFLAG_WCACHE; 738 739 set_wcache(drive, 1); 740 741 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 742 (drive->head == 0 || drive->head > 16)) 743 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 744 drive->name, drive->head); 745} 746 747static void ide_disk_flush(ide_drive_t *drive) 748{ 749 if (ata_id_flush_enabled(drive->id) == 0 || 750 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 751 return; 752 753 if (do_idedisk_flushcache(drive)) 754 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 755} 756 757static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 758{ 759 return 0; 760} 761 762static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 763 int on) 764{ 765 struct ide_cmd cmd; 766 int ret; 767 768 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 769 return 0; 770 771 memset(&cmd, 0, sizeof(cmd)); 772 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 773 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 774 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 775 776 ret = ide_no_data_taskfile(drive, &cmd); 777 778 if (ret) 779 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 780 781 return ret; 782} 783 784const struct ide_disk_ops ide_ata_disk_ops = { 785 .check = ide_disk_check, 786 .unlock_native_capacity = ide_disk_unlock_native_capacity, 787 .get_capacity = ide_disk_get_capacity, 788 .setup = ide_disk_setup, 789 .flush = ide_disk_flush, 790 .init_media = ide_disk_init_media, 791 .set_doorlock = ide_disk_set_doorlock, 792 .do_request = ide_do_rw_disk, 793 .ioctl = ide_disk_ioctl, 794 .compat_ioctl = ide_disk_ioctl, 795}; 796