ide-disk.c revision 89f78b3261f7e331e41753ea2459fbb9b60a6f7a
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)rq->nr_sectors; 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 + rq->nr_sectors > 1ULL << 28) 94 dma = 0; 95 else 96 lba48 = 0; 97 } 98 99 memset(&cmd, 0, sizeof(cmd)); 100 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 101 102 if (dma == 0) { 103 ide_init_sg_cmd(&cmd, nsectors); 104 ide_map_sg(drive, rq); 105 } 106 107 if (drive->dev_flags & IDE_DFLAG_LBA) { 108 if (lba48) { 109 pr_debug("%s: LBA=0x%012llx\n", drive->name, 110 (unsigned long long)block); 111 112 tf->hob_nsect = (nsectors >> 8) & 0xff; 113 tf->hob_lbal = (u8)(block >> 24); 114 if (sizeof(block) != 4) { 115 tf->hob_lbam = (u8)((u64)block >> 32); 116 tf->hob_lbah = (u8)((u64)block >> 40); 117 } 118 119 tf->nsect = nsectors & 0xff; 120 tf->lbal = (u8) block; 121 tf->lbam = (u8)(block >> 8); 122 tf->lbah = (u8)(block >> 16); 123 124 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 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; 131 } 132 133 tf->device |= ATA_LBA; 134 } else { 135 unsigned int sect, head, cyl, track; 136 137 track = (int)block / drive->sect; 138 sect = (int)block % drive->sect + 1; 139 head = track % drive->head; 140 cyl = track / drive->head; 141 142 pr_debug("%s: CHS=%u/%u/%u\n", drive->name, cyl, head, sect); 143 144 tf->nsect = nsectors & 0xff; 145 tf->lbal = sect; 146 tf->lbam = cyl; 147 tf->lbah = cyl >> 8; 148 tf->device = head; 149 } 150 151 cmd.tf_flags |= IDE_TFLAG_FS; 152 153 if (rq_data_dir(rq)) 154 cmd.tf_flags |= IDE_TFLAG_WRITE; 155 156 ide_tf_set_cmd(drive, &cmd, dma); 157 cmd.rq = rq; 158 159 rc = do_rw_taskfile(drive, &cmd); 160 161 if (rc == ide_stopped && dma) { 162 /* fallback to PIO */ 163 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 164 ide_tf_set_cmd(drive, &cmd, 0); 165 ide_init_sg_cmd(&cmd, nsectors); 166 rc = do_rw_taskfile(drive, &cmd); 167 } 168 169 return rc; 170} 171 172/* 173 * 268435455 == 137439 MB or 28bit limit 174 * 320173056 == 163929 MB or 48bit addressing 175 * 1073741822 == 549756 MB or 48bit addressing fake drive 176 */ 177 178static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 179 sector_t block) 180{ 181 ide_hwif_t *hwif = drive->hwif; 182 183 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 184 185 if (!blk_fs_request(rq)) { 186 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 187 if (rq->errors == 0) 188 rq->errors = -EIO; 189 ide_end_request(drive, 0, 0); 190 return ide_stopped; 191 } 192 193 ledtrig_ide_activity(); 194 195 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 196 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 197 (unsigned long long)block, rq->nr_sectors, 198 (unsigned long)rq->buffer); 199 200 if (hwif->rw_disk) 201 hwif->rw_disk(drive, rq); 202 203 return __ide_do_rw_disk(drive, rq, block); 204} 205 206/* 207 * Queries for true maximum capacity of the drive. 208 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 209 */ 210static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 211{ 212 struct ide_cmd cmd; 213 struct ide_taskfile *tf = &cmd.tf; 214 u64 addr = 0; 215 216 memset(&cmd, 0, sizeof(cmd)); 217 if (lba48) 218 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 219 else 220 tf->command = ATA_CMD_READ_NATIVE_MAX; 221 tf->device = ATA_LBA; 222 223 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 224 if (lba48) 225 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 226 227 ide_no_data_taskfile(drive, &cmd); 228 229 /* if OK, compute maximum address value */ 230 if ((tf->status & 0x01) == 0) 231 addr = ide_get_lba_addr(tf, 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 tf->hob_lbal = (addr_req >>= 8) & 0xff; 254 tf->hob_lbam = (addr_req >>= 8) & 0xff; 255 tf->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.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 264 if (lba48) 265 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 266 267 ide_no_data_taskfile(drive, &cmd); 268 269 /* if OK, compute maximum address value */ 270 if ((tf->status & 0x01) == 0) 271 addr_set = ide_get_lba_addr(tf, lba48) + 1; 272 273 return addr_set; 274} 275 276static unsigned long long sectors_to_MB(unsigned long long n) 277{ 278 n <<= 9; /* make it bytes */ 279 do_div(n, 1000000); /* make it MB */ 280 return n; 281} 282 283/* 284 * Some disks report total number of sectors instead of 285 * maximum sector address. We list them here. 286 */ 287static const struct drive_list_entry hpa_list[] = { 288 { "ST340823A", NULL }, 289 { "ST320413A", NULL }, 290 { "ST310211A", NULL }, 291 { NULL, NULL } 292}; 293 294static void idedisk_check_hpa(ide_drive_t *drive) 295{ 296 unsigned long long capacity, set_max; 297 int lba48 = ata_id_lba48_enabled(drive->id); 298 299 capacity = drive->capacity64; 300 301 set_max = idedisk_read_native_max_address(drive, lba48); 302 303 if (ide_in_drive_list(drive->id, hpa_list)) { 304 /* 305 * Since we are inclusive wrt to firmware revisions do this 306 * extra check and apply the workaround only when needed. 307 */ 308 if (set_max == capacity + 1) 309 set_max--; 310 } 311 312 if (set_max <= capacity) 313 return; 314 315 printk(KERN_INFO "%s: Host Protected Area detected.\n" 316 "\tcurrent capacity is %llu sectors (%llu MB)\n" 317 "\tnative capacity is %llu sectors (%llu MB)\n", 318 drive->name, 319 capacity, sectors_to_MB(capacity), 320 set_max, sectors_to_MB(set_max)); 321 322 set_max = idedisk_set_max_address(drive, set_max, lba48); 323 324 if (set_max) { 325 drive->capacity64 = set_max; 326 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 327 drive->name); 328 } 329} 330 331static int ide_disk_get_capacity(ide_drive_t *drive) 332{ 333 u16 *id = drive->id; 334 int lba; 335 336 if (ata_id_lba48_enabled(id)) { 337 /* drive speaks 48-bit LBA */ 338 lba = 1; 339 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 340 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 341 /* drive speaks 28-bit LBA */ 342 lba = 1; 343 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 344 } else { 345 /* drive speaks boring old 28-bit CHS */ 346 lba = 0; 347 drive->capacity64 = drive->cyl * drive->head * drive->sect; 348 } 349 350 if (lba) { 351 drive->dev_flags |= IDE_DFLAG_LBA; 352 353 /* 354 * If this device supports the Host Protected Area feature set, 355 * then we may need to change our opinion about its capacity. 356 */ 357 if (ata_id_hpa_enabled(id)) 358 idedisk_check_hpa(drive); 359 } 360 361 /* limit drive capacity to 137GB if LBA48 cannot be used */ 362 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 363 drive->capacity64 > 1ULL << 28) { 364 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 365 "%llu sectors (%llu MB)\n", 366 drive->name, (unsigned long long)drive->capacity64, 367 sectors_to_MB(drive->capacity64)); 368 drive->capacity64 = 1ULL << 28; 369 } 370 371 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 372 (drive->dev_flags & IDE_DFLAG_LBA48)) { 373 if (drive->capacity64 > 1ULL << 28) { 374 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 375 " will be used for accessing sectors " 376 "> %u\n", drive->name, 1 << 28); 377 } else 378 drive->dev_flags &= ~IDE_DFLAG_LBA48; 379 } 380 381 return 0; 382} 383 384static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 385{ 386 ide_drive_t *drive = q->queuedata; 387 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); 388 389 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 390 BUG_ON(cmd == NULL); 391 392 memset(cmd, 0, sizeof(*cmd)); 393 if (ata_id_flush_ext_enabled(drive->id) && 394 (drive->capacity64 >= (1UL << 28))) 395 cmd->tf.command = ATA_CMD_FLUSH_EXT; 396 else 397 cmd->tf.command = ATA_CMD_FLUSH; 398 cmd->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE | 399 IDE_TFLAG_DYN; 400 cmd->protocol = ATA_PROT_NODATA; 401 402 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 403 rq->cmd_flags |= REQ_SOFTBARRIER; 404 rq->special = cmd; 405} 406 407ide_devset_get(multcount, mult_count); 408 409/* 410 * This is tightly woven into the driver->do_special can not touch. 411 * DON'T do it again until a total personality rewrite is committed. 412 */ 413static int set_multcount(ide_drive_t *drive, int arg) 414{ 415 struct request *rq; 416 int error; 417 418 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 419 return -EINVAL; 420 421 if (drive->special.b.set_multmode) 422 return -EBUSY; 423 424 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 425 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 426 427 drive->mult_req = arg; 428 drive->special.b.set_multmode = 1; 429 error = blk_execute_rq(drive->queue, NULL, rq, 0); 430 blk_put_request(rq); 431 432 return (drive->mult_count == arg) ? 0 : -EIO; 433} 434 435ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 436 437static int set_nowerr(ide_drive_t *drive, int arg) 438{ 439 if (arg < 0 || arg > 1) 440 return -EINVAL; 441 442 if (arg) 443 drive->dev_flags |= IDE_DFLAG_NOWERR; 444 else 445 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 446 447 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 448 449 return 0; 450} 451 452static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 453{ 454 struct ide_cmd cmd; 455 456 memset(&cmd, 0, sizeof(cmd)); 457 cmd.tf.feature = feature; 458 cmd.tf.nsect = nsect; 459 cmd.tf.command = ATA_CMD_SET_FEATURES; 460 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 461 462 return ide_no_data_taskfile(drive, &cmd); 463} 464 465static void update_ordered(ide_drive_t *drive) 466{ 467 u16 *id = drive->id; 468 unsigned ordered = QUEUE_ORDERED_NONE; 469 prepare_flush_fn *prep_fn = NULL; 470 471 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 472 unsigned long long capacity; 473 int barrier; 474 /* 475 * We must avoid issuing commands a drive does not 476 * understand or we may crash it. We check flush cache 477 * is supported. We also check we have the LBA48 flush 478 * cache if the drive capacity is too large. By this 479 * time we have trimmed the drive capacity if LBA48 is 480 * not available so we don't need to recheck that. 481 */ 482 capacity = ide_gd_capacity(drive); 483 barrier = ata_id_flush_enabled(id) && 484 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 485 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 486 capacity <= (1ULL << 28) || 487 ata_id_flush_ext_enabled(id)); 488 489 printk(KERN_INFO "%s: cache flushes %ssupported\n", 490 drive->name, barrier ? "" : "not "); 491 492 if (barrier) { 493 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 494 prep_fn = idedisk_prepare_flush; 495 } 496 } else 497 ordered = QUEUE_ORDERED_DRAIN; 498 499 blk_queue_ordered(drive->queue, ordered, prep_fn); 500} 501 502ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 503 504static int set_wcache(ide_drive_t *drive, int arg) 505{ 506 int err = 1; 507 508 if (arg < 0 || arg > 1) 509 return -EINVAL; 510 511 if (ata_id_flush_enabled(drive->id)) { 512 err = ide_do_setfeature(drive, 513 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 514 if (err == 0) { 515 if (arg) 516 drive->dev_flags |= IDE_DFLAG_WCACHE; 517 else 518 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 519 } 520 } 521 522 update_ordered(drive); 523 524 return err; 525} 526 527static int do_idedisk_flushcache(ide_drive_t *drive) 528{ 529 struct ide_cmd cmd; 530 531 memset(&cmd, 0, sizeof(cmd)); 532 if (ata_id_flush_ext_enabled(drive->id)) 533 cmd.tf.command = ATA_CMD_FLUSH_EXT; 534 else 535 cmd.tf.command = ATA_CMD_FLUSH; 536 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 537 538 return ide_no_data_taskfile(drive, &cmd); 539} 540 541ide_devset_get(acoustic, acoustic); 542 543static int set_acoustic(ide_drive_t *drive, int arg) 544{ 545 if (arg < 0 || arg > 254) 546 return -EINVAL; 547 548 ide_do_setfeature(drive, 549 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 550 551 drive->acoustic = arg; 552 553 return 0; 554} 555 556ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 557 558/* 559 * drive->addressing: 560 * 0: 28-bit 561 * 1: 48-bit 562 * 2: 48-bit capable doing 28-bit 563 */ 564static int set_addressing(ide_drive_t *drive, int arg) 565{ 566 if (arg < 0 || arg > 2) 567 return -EINVAL; 568 569 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 570 ata_id_lba48_enabled(drive->id) == 0)) 571 return -EIO; 572 573 if (arg == 2) 574 arg = 0; 575 576 if (arg) 577 drive->dev_flags |= IDE_DFLAG_LBA48; 578 else 579 drive->dev_flags &= ~IDE_DFLAG_LBA48; 580 581 return 0; 582} 583 584ide_ext_devset_rw(acoustic, acoustic); 585ide_ext_devset_rw(address, addressing); 586ide_ext_devset_rw(multcount, multcount); 587ide_ext_devset_rw(wcache, wcache); 588 589ide_ext_devset_rw_sync(nowerr, nowerr); 590 591static int ide_disk_check(ide_drive_t *drive, const char *s) 592{ 593 return 1; 594} 595 596static void ide_disk_setup(ide_drive_t *drive) 597{ 598 struct ide_disk_obj *idkp = drive->driver_data; 599 struct request_queue *q = drive->queue; 600 ide_hwif_t *hwif = drive->hwif; 601 u16 *id = drive->id; 602 char *m = (char *)&id[ATA_ID_PROD]; 603 unsigned long long capacity; 604 605 ide_proc_register_driver(drive, idkp->driver); 606 607 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 608 return; 609 610 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 611 /* 612 * Removable disks (eg. SYQUEST); ignore 'WD' drives 613 */ 614 if (m[0] != 'W' || m[1] != 'D') 615 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 616 } 617 618 (void)set_addressing(drive, 1); 619 620 if (drive->dev_flags & IDE_DFLAG_LBA48) { 621 int max_s = 2048; 622 623 if (max_s > hwif->rqsize) 624 max_s = hwif->rqsize; 625 626 blk_queue_max_sectors(q, max_s); 627 } 628 629 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 630 q->max_sectors / 2); 631 632 if (ata_id_is_ssd(id)) 633 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); 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 struct ide_cmd cmd; 711 int ret; 712 713 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 714 return 0; 715 716 memset(&cmd, 0, sizeof(cmd)); 717 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 718 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 719 720 ret = ide_no_data_taskfile(drive, &cmd); 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 .ioctl = ide_disk_ioctl, 737}; 738