ide-disk.c revision 60f85019c6c8c1aebf3485a313e0da094bc95d07
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.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->hob_nsect = (nsectors >> 8) & 0xff; 109 tf->hob_lbal = (u8)(block >> 24); 110 if (sizeof(block) != 4) { 111 tf->hob_lbam = (u8)((u64)block >> 32); 112 tf->hob_lbah = (u8)((u64)block >> 40); 113 } 114 115 tf->nsect = nsectors & 0xff; 116 tf->lbal = (u8) block; 117 tf->lbam = (u8)(block >> 8); 118 tf->lbah = (u8)(block >> 16); 119 120 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 121 cmd.valid.in.hob = IDE_VALID_IN_HOB; 122 cmd.tf_flags |= IDE_TFLAG_LBA48; 123 } else { 124 tf->nsect = nsectors & 0xff; 125 tf->lbal = block; 126 tf->lbam = block >>= 8; 127 tf->lbah = block >>= 8; 128 tf->device = (block >> 8) & 0xf; 129 } 130 131 tf->device |= ATA_LBA; 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); 187 188 if (!blk_fs_request(rq)) { 189 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 190 if (rq->errors == 0) 191 rq->errors = -EIO; 192 ide_complete_rq(drive, -EIO, ide_rq_bytes(rq)); 193 return ide_stopped; 194 } 195 196 ledtrig_ide_activity(); 197 198 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 199 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 200 (unsigned long long)block, rq->nr_sectors, 201 (unsigned long)rq->buffer); 202 203 if (hwif->rw_disk) 204 hwif->rw_disk(drive, rq); 205 206 return __ide_do_rw_disk(drive, rq, block); 207} 208 209/* 210 * Queries for true maximum capacity of the drive. 211 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 212 */ 213static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 214{ 215 struct ide_cmd cmd; 216 struct ide_taskfile *tf = &cmd.tf; 217 u64 addr = 0; 218 219 memset(&cmd, 0, sizeof(cmd)); 220 if (lba48) 221 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 222 else 223 tf->command = ATA_CMD_READ_NATIVE_MAX; 224 tf->device = ATA_LBA; 225 226 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 227 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 228 if (lba48) { 229 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 230 cmd.valid.in.hob = IDE_VALID_IN_HOB; 231 cmd.tf_flags = IDE_TFLAG_LBA48; 232 } 233 234 ide_no_data_taskfile(drive, &cmd); 235 236 /* if OK, compute maximum address value */ 237 if (!(tf->status & ATA_ERR)) 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 struct ide_cmd cmd; 250 struct ide_taskfile *tf = &cmd.tf; 251 u64 addr_set = 0; 252 253 addr_req--; 254 255 memset(&cmd, 0, sizeof(cmd)); 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; 269 270 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 271 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 272 if (lba48) { 273 cmd.valid.out.hob = IDE_VALID_OUT_HOB; 274 cmd.valid.in.hob = IDE_VALID_IN_HOB; 275 cmd.tf_flags = IDE_TFLAG_LBA48; 276 } 277 278 ide_no_data_taskfile(drive, &cmd); 279 280 /* if OK, compute maximum address value */ 281 if (!(tf->status & ATA_ERR)) 282 addr_set = ide_get_lba_addr(tf, lba48) + 1; 283 284 return addr_set; 285} 286 287static unsigned long long sectors_to_MB(unsigned long long n) 288{ 289 n <<= 9; /* make it bytes */ 290 do_div(n, 1000000); /* make it MB */ 291 return n; 292} 293 294/* 295 * Some disks report total number of sectors instead of 296 * maximum sector address. We list them here. 297 */ 298static const struct drive_list_entry hpa_list[] = { 299 { "ST340823A", NULL }, 300 { "ST320413A", NULL }, 301 { "ST310211A", NULL }, 302 { NULL, NULL } 303}; 304 305static void idedisk_check_hpa(ide_drive_t *drive) 306{ 307 unsigned long long capacity, set_max; 308 int lba48 = ata_id_lba48_enabled(drive->id); 309 310 capacity = drive->capacity64; 311 312 set_max = idedisk_read_native_max_address(drive, lba48); 313 314 if (ide_in_drive_list(drive->id, hpa_list)) { 315 /* 316 * Since we are inclusive wrt to firmware revisions do this 317 * extra check and apply the workaround only when needed. 318 */ 319 if (set_max == capacity + 1) 320 set_max--; 321 } 322 323 if (set_max <= capacity) 324 return; 325 326 printk(KERN_INFO "%s: Host Protected Area detected.\n" 327 "\tcurrent capacity is %llu sectors (%llu MB)\n" 328 "\tnative capacity is %llu sectors (%llu MB)\n", 329 drive->name, 330 capacity, sectors_to_MB(capacity), 331 set_max, sectors_to_MB(set_max)); 332 333 set_max = idedisk_set_max_address(drive, set_max, lba48); 334 335 if (set_max) { 336 drive->capacity64 = set_max; 337 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 338 drive->name); 339 } 340} 341 342static int ide_disk_get_capacity(ide_drive_t *drive) 343{ 344 u16 *id = drive->id; 345 int lba; 346 347 if (ata_id_lba48_enabled(id)) { 348 /* drive speaks 48-bit LBA */ 349 lba = 1; 350 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 351 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 352 /* drive speaks 28-bit LBA */ 353 lba = 1; 354 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 355 } else { 356 /* drive speaks boring old 28-bit CHS */ 357 lba = 0; 358 drive->capacity64 = drive->cyl * drive->head * drive->sect; 359 } 360 361 if (lba) { 362 drive->dev_flags |= IDE_DFLAG_LBA; 363 364 /* 365 * If this device supports the Host Protected Area feature set, 366 * then we may need to change our opinion about its capacity. 367 */ 368 if (ata_id_hpa_enabled(id)) 369 idedisk_check_hpa(drive); 370 } 371 372 /* limit drive capacity to 137GB if LBA48 cannot be used */ 373 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 374 drive->capacity64 > 1ULL << 28) { 375 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 376 "%llu sectors (%llu MB)\n", 377 drive->name, (unsigned long long)drive->capacity64, 378 sectors_to_MB(drive->capacity64)); 379 drive->capacity64 = 1ULL << 28; 380 } 381 382 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 383 (drive->dev_flags & IDE_DFLAG_LBA48)) { 384 if (drive->capacity64 > 1ULL << 28) { 385 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 386 " will be used for accessing sectors " 387 "> %u\n", drive->name, 1 << 28); 388 } else 389 drive->dev_flags &= ~IDE_DFLAG_LBA48; 390 } 391 392 return 0; 393} 394 395static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 396{ 397 ide_drive_t *drive = q->queuedata; 398 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); 399 400 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 401 BUG_ON(cmd == NULL); 402 403 memset(cmd, 0, sizeof(*cmd)); 404 if (ata_id_flush_ext_enabled(drive->id) && 405 (drive->capacity64 >= (1UL << 28))) 406 cmd->tf.command = ATA_CMD_FLUSH_EXT; 407 else 408 cmd->tf.command = ATA_CMD_FLUSH; 409 cmd->valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 410 cmd->tf_flags = IDE_TFLAG_DYN; 411 cmd->protocol = ATA_PROT_NODATA; 412 413 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 414 rq->cmd_flags |= REQ_SOFTBARRIER; 415 rq->special = cmd; 416} 417 418ide_devset_get(multcount, mult_count); 419 420/* 421 * This is tightly woven into the driver->do_special can not touch. 422 * DON'T do it again until a total personality rewrite is committed. 423 */ 424static int set_multcount(ide_drive_t *drive, int arg) 425{ 426 struct request *rq; 427 int error; 428 429 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 430 return -EINVAL; 431 432 if (drive->special.b.set_multmode) 433 return -EBUSY; 434 435 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 436 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 437 438 drive->mult_req = arg; 439 drive->special.b.set_multmode = 1; 440 error = blk_execute_rq(drive->queue, NULL, rq, 0); 441 blk_put_request(rq); 442 443 return (drive->mult_count == arg) ? 0 : -EIO; 444} 445 446ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 447 448static int set_nowerr(ide_drive_t *drive, int arg) 449{ 450 if (arg < 0 || arg > 1) 451 return -EINVAL; 452 453 if (arg) 454 drive->dev_flags |= IDE_DFLAG_NOWERR; 455 else 456 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 457 458 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 459 460 return 0; 461} 462 463static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 464{ 465 struct ide_cmd cmd; 466 467 memset(&cmd, 0, sizeof(cmd)); 468 cmd.tf.feature = feature; 469 cmd.tf.nsect = nsect; 470 cmd.tf.command = ATA_CMD_SET_FEATURES; 471 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 472 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 473 474 return ide_no_data_taskfile(drive, &cmd); 475} 476 477static void update_ordered(ide_drive_t *drive) 478{ 479 u16 *id = drive->id; 480 unsigned ordered = QUEUE_ORDERED_NONE; 481 prepare_flush_fn *prep_fn = NULL; 482 483 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 484 unsigned long long capacity; 485 int barrier; 486 /* 487 * We must avoid issuing commands a drive does not 488 * understand or we may crash it. We check flush cache 489 * is supported. We also check we have the LBA48 flush 490 * cache if the drive capacity is too large. By this 491 * time we have trimmed the drive capacity if LBA48 is 492 * not available so we don't need to recheck that. 493 */ 494 capacity = ide_gd_capacity(drive); 495 barrier = ata_id_flush_enabled(id) && 496 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 497 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 498 capacity <= (1ULL << 28) || 499 ata_id_flush_ext_enabled(id)); 500 501 printk(KERN_INFO "%s: cache flushes %ssupported\n", 502 drive->name, barrier ? "" : "not "); 503 504 if (barrier) { 505 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 506 prep_fn = idedisk_prepare_flush; 507 } 508 } else 509 ordered = QUEUE_ORDERED_DRAIN; 510 511 blk_queue_ordered(drive->queue, ordered, prep_fn); 512} 513 514ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 515 516static int set_wcache(ide_drive_t *drive, int arg) 517{ 518 int err = 1; 519 520 if (arg < 0 || arg > 1) 521 return -EINVAL; 522 523 if (ata_id_flush_enabled(drive->id)) { 524 err = ide_do_setfeature(drive, 525 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 526 if (err == 0) { 527 if (arg) 528 drive->dev_flags |= IDE_DFLAG_WCACHE; 529 else 530 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 531 } 532 } 533 534 update_ordered(drive); 535 536 return err; 537} 538 539static int do_idedisk_flushcache(ide_drive_t *drive) 540{ 541 struct ide_cmd cmd; 542 543 memset(&cmd, 0, sizeof(cmd)); 544 if (ata_id_flush_ext_enabled(drive->id)) 545 cmd.tf.command = ATA_CMD_FLUSH_EXT; 546 else 547 cmd.tf.command = ATA_CMD_FLUSH; 548 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 549 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 550 551 return ide_no_data_taskfile(drive, &cmd); 552} 553 554ide_devset_get(acoustic, acoustic); 555 556static int set_acoustic(ide_drive_t *drive, int arg) 557{ 558 if (arg < 0 || arg > 254) 559 return -EINVAL; 560 561 ide_do_setfeature(drive, 562 arg ? SETFEATURES_AAM_ON : SETFEATURES_AAM_OFF, arg); 563 564 drive->acoustic = arg; 565 566 return 0; 567} 568 569ide_devset_get_flag(addressing, IDE_DFLAG_LBA48); 570 571/* 572 * drive->addressing: 573 * 0: 28-bit 574 * 1: 48-bit 575 * 2: 48-bit capable doing 28-bit 576 */ 577static int set_addressing(ide_drive_t *drive, int arg) 578{ 579 if (arg < 0 || arg > 2) 580 return -EINVAL; 581 582 if (arg && ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48) || 583 ata_id_lba48_enabled(drive->id) == 0)) 584 return -EIO; 585 586 if (arg == 2) 587 arg = 0; 588 589 if (arg) 590 drive->dev_flags |= IDE_DFLAG_LBA48; 591 else 592 drive->dev_flags &= ~IDE_DFLAG_LBA48; 593 594 return 0; 595} 596 597ide_ext_devset_rw(acoustic, acoustic); 598ide_ext_devset_rw(address, addressing); 599ide_ext_devset_rw(multcount, multcount); 600ide_ext_devset_rw(wcache, wcache); 601 602ide_ext_devset_rw_sync(nowerr, nowerr); 603 604static int ide_disk_check(ide_drive_t *drive, const char *s) 605{ 606 return 1; 607} 608 609static void ide_disk_setup(ide_drive_t *drive) 610{ 611 struct ide_disk_obj *idkp = drive->driver_data; 612 struct request_queue *q = drive->queue; 613 ide_hwif_t *hwif = drive->hwif; 614 u16 *id = drive->id; 615 char *m = (char *)&id[ATA_ID_PROD]; 616 unsigned long long capacity; 617 618 ide_proc_register_driver(drive, idkp->driver); 619 620 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 621 return; 622 623 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 624 /* 625 * Removable disks (eg. SYQUEST); ignore 'WD' drives 626 */ 627 if (m[0] != 'W' || m[1] != 'D') 628 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 629 } 630 631 (void)set_addressing(drive, 1); 632 633 if (drive->dev_flags & IDE_DFLAG_LBA48) { 634 int max_s = 2048; 635 636 if (max_s > hwif->rqsize) 637 max_s = hwif->rqsize; 638 639 blk_queue_max_sectors(q, max_s); 640 } 641 642 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 643 q->max_sectors / 2); 644 645 if (ata_id_is_ssd(id)) 646 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); 647 648 /* calculate drive capacity, and select LBA if possible */ 649 ide_disk_get_capacity(drive); 650 651 /* 652 * if possible, give fdisk access to more of the drive, 653 * by correcting bios_cyls: 654 */ 655 capacity = ide_gd_capacity(drive); 656 657 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 658 if (ata_id_lba48_enabled(drive->id)) { 659 /* compatibility */ 660 drive->bios_sect = 63; 661 drive->bios_head = 255; 662 } 663 664 if (drive->bios_sect && drive->bios_head) { 665 unsigned int cap0 = capacity; /* truncate to 32 bits */ 666 unsigned int cylsz, cyl; 667 668 if (cap0 != capacity) 669 drive->bios_cyl = 65535; 670 else { 671 cylsz = drive->bios_sect * drive->bios_head; 672 cyl = cap0 / cylsz; 673 if (cyl > 65535) 674 cyl = 65535; 675 if (cyl > drive->bios_cyl) 676 drive->bios_cyl = cyl; 677 } 678 } 679 } 680 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 681 drive->name, capacity, sectors_to_MB(capacity)); 682 683 /* Only print cache size when it was specified */ 684 if (id[ATA_ID_BUF_SIZE]) 685 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 686 687 printk(KERN_CONT ", CHS=%d/%d/%d\n", 688 drive->bios_cyl, drive->bios_head, drive->bios_sect); 689 690 /* write cache enabled? */ 691 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 692 drive->dev_flags |= IDE_DFLAG_WCACHE; 693 694 set_wcache(drive, 1); 695 696 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 697 (drive->head == 0 || drive->head > 16)) { 698 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 699 drive->name, drive->head); 700 drive->dev_flags &= ~IDE_DFLAG_ATTACH; 701 } else 702 drive->dev_flags |= IDE_DFLAG_ATTACH; 703} 704 705static void ide_disk_flush(ide_drive_t *drive) 706{ 707 if (ata_id_flush_enabled(drive->id) == 0 || 708 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 709 return; 710 711 if (do_idedisk_flushcache(drive)) 712 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 713} 714 715static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 716{ 717 return 0; 718} 719 720static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 721 int on) 722{ 723 struct ide_cmd cmd; 724 int ret; 725 726 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 727 return 0; 728 729 memset(&cmd, 0, sizeof(cmd)); 730 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 731 cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE; 732 cmd.valid.in.tf = IDE_VALID_IN_TF | IDE_VALID_DEVICE; 733 734 ret = ide_no_data_taskfile(drive, &cmd); 735 736 if (ret) 737 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 738 739 return ret; 740} 741 742const struct ide_disk_ops ide_ata_disk_ops = { 743 .check = ide_disk_check, 744 .get_capacity = ide_disk_get_capacity, 745 .setup = ide_disk_setup, 746 .flush = ide_disk_flush, 747 .init_media = ide_disk_init_media, 748 .set_doorlock = ide_disk_set_doorlock, 749 .do_request = ide_do_rw_disk, 750 .ioctl = ide_disk_ioctl, 751}; 752