ide-disk.c revision 22aa4b32a19b1f231d4ce7e9af6354b577a22a35
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#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, struct ide_cmd *cmd, u8 dma) 66{ 67 u8 index, lba48, write; 68 69 lba48 = (cmd->tf_flags & IDE_TFLAG_LBA48) ? 2 : 0; 70 write = (cmd->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 cmd->tf.command = ide_rw_cmds[index + lba48 + write]; 78 79 if (dma) 80 index = 8; /* fixup index */ 81 82 cmd->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 = drive->hwif; 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 struct ide_cmd cmd; 97 struct ide_taskfile *tf = &cmd.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(&cmd, 0, sizeof(cmd)); 113 cmd.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 cmd.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 cmd.tf_flags |= IDE_TFLAG_WRITE; 161 162 ide_tf_set_cmd(drive, &cmd, dma); 163 cmd.rq = rq; 164 165 rc = do_rw_taskfile(drive, &cmd); 166 167 if (rc == ide_stopped && dma) { 168 /* fallback to PIO */ 169 cmd.tf_flags |= IDE_TFLAG_DMA_PIO_FALLBACK; 170 ide_tf_set_cmd(drive, &cmd, 0); 171 ide_init_sg_cmd(drive, rq); 172 rc = do_rw_taskfile(drive, &cmd); 173 } 174 175 return rc; 176} 177 178/* 179 * 268435455 == 137439 MB or 28bit limit 180 * 320173056 == 163929 MB or 48bit addressing 181 * 1073741822 == 549756 MB or 48bit addressing fake drive 182 */ 183 184static ide_startstop_t ide_do_rw_disk(ide_drive_t *drive, struct request *rq, 185 sector_t block) 186{ 187 ide_hwif_t *hwif = drive->hwif; 188 189 BUG_ON(drive->dev_flags & IDE_DFLAG_BLOCKED); 190 191 if (!blk_fs_request(rq)) { 192 blk_dump_rq_flags(rq, "ide_do_rw_disk - bad command"); 193 ide_end_request(drive, 0, 0); 194 return ide_stopped; 195 } 196 197 ledtrig_ide_activity(); 198 199 pr_debug("%s: %sing: block=%llu, sectors=%lu, buffer=0x%08lx\n", 200 drive->name, rq_data_dir(rq) == READ ? "read" : "writ", 201 (unsigned long long)block, rq->nr_sectors, 202 (unsigned long)rq->buffer); 203 204 if (hwif->rw_disk) 205 hwif->rw_disk(drive, rq); 206 207 return __ide_do_rw_disk(drive, rq, block); 208} 209 210/* 211 * Queries for true maximum capacity of the drive. 212 * Returns maximum LBA address (> 0) of the drive, 0 if failed. 213 */ 214static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48) 215{ 216 struct ide_cmd cmd; 217 struct ide_taskfile *tf = &cmd.tf; 218 u64 addr = 0; 219 220 memset(&cmd, 0, sizeof(cmd)); 221 if (lba48) 222 tf->command = ATA_CMD_READ_NATIVE_MAX_EXT; 223 else 224 tf->command = ATA_CMD_READ_NATIVE_MAX; 225 tf->device = ATA_LBA; 226 227 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 228 if (lba48) 229 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 230 231 ide_no_data_taskfile(drive, &cmd); 232 233 /* if OK, compute maximum address value */ 234 if ((tf->status & 0x01) == 0) 235 addr = ide_get_lba_addr(tf, lba48) + 1; 236 237 return addr; 238} 239 240/* 241 * Sets maximum virtual LBA address of the drive. 242 * Returns new maximum virtual LBA address (> 0) or 0 on failure. 243 */ 244static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48) 245{ 246 struct ide_cmd cmd; 247 struct ide_taskfile *tf = &cmd.tf; 248 u64 addr_set = 0; 249 250 addr_req--; 251 252 memset(&cmd, 0, sizeof(cmd)); 253 tf->lbal = (addr_req >> 0) & 0xff; 254 tf->lbam = (addr_req >>= 8) & 0xff; 255 tf->lbah = (addr_req >>= 8) & 0xff; 256 if (lba48) { 257 tf->hob_lbal = (addr_req >>= 8) & 0xff; 258 tf->hob_lbam = (addr_req >>= 8) & 0xff; 259 tf->hob_lbah = (addr_req >>= 8) & 0xff; 260 tf->command = ATA_CMD_SET_MAX_EXT; 261 } else { 262 tf->device = (addr_req >>= 8) & 0x0f; 263 tf->command = ATA_CMD_SET_MAX; 264 } 265 tf->device |= ATA_LBA; 266 267 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 268 if (lba48) 269 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_HOB); 270 271 ide_no_data_taskfile(drive, &cmd); 272 273 /* if OK, compute maximum address value */ 274 if ((tf->status & 0x01) == 0) 275 addr_set = ide_get_lba_addr(tf, 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 void idedisk_check_hpa(ide_drive_t *drive) 299{ 300 unsigned long long capacity, set_max; 301 int lba48 = ata_id_lba48_enabled(drive->id); 302 303 capacity = drive->capacity64; 304 305 set_max = idedisk_read_native_max_address(drive, lba48); 306 307 if (ide_in_drive_list(drive->id, hpa_list)) { 308 /* 309 * Since we are inclusive wrt to firmware revisions do this 310 * extra check and apply the workaround only when needed. 311 */ 312 if (set_max == capacity + 1) 313 set_max--; 314 } 315 316 if (set_max <= capacity) 317 return; 318 319 printk(KERN_INFO "%s: Host Protected Area detected.\n" 320 "\tcurrent capacity is %llu sectors (%llu MB)\n" 321 "\tnative capacity is %llu sectors (%llu MB)\n", 322 drive->name, 323 capacity, sectors_to_MB(capacity), 324 set_max, sectors_to_MB(set_max)); 325 326 set_max = idedisk_set_max_address(drive, set_max, lba48); 327 328 if (set_max) { 329 drive->capacity64 = set_max; 330 printk(KERN_INFO "%s: Host Protected Area disabled.\n", 331 drive->name); 332 } 333} 334 335static int ide_disk_get_capacity(ide_drive_t *drive) 336{ 337 u16 *id = drive->id; 338 int lba; 339 340 if (ata_id_lba48_enabled(id)) { 341 /* drive speaks 48-bit LBA */ 342 lba = 1; 343 drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2); 344 } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) { 345 /* drive speaks 28-bit LBA */ 346 lba = 1; 347 drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY); 348 } else { 349 /* drive speaks boring old 28-bit CHS */ 350 lba = 0; 351 drive->capacity64 = drive->cyl * drive->head * drive->sect; 352 } 353 354 if (lba) { 355 drive->dev_flags |= IDE_DFLAG_LBA; 356 357 /* 358 * If this device supports the Host Protected Area feature set, 359 * then we may need to change our opinion about its capacity. 360 */ 361 if (ata_id_hpa_enabled(id)) 362 idedisk_check_hpa(drive); 363 } 364 365 /* limit drive capacity to 137GB if LBA48 cannot be used */ 366 if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 && 367 drive->capacity64 > 1ULL << 28) { 368 printk(KERN_WARNING "%s: cannot use LBA48 - full capacity " 369 "%llu sectors (%llu MB)\n", 370 drive->name, (unsigned long long)drive->capacity64, 371 sectors_to_MB(drive->capacity64)); 372 drive->capacity64 = 1ULL << 28; 373 } 374 375 if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) && 376 (drive->dev_flags & IDE_DFLAG_LBA48)) { 377 if (drive->capacity64 > 1ULL << 28) { 378 printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode" 379 " will be used for accessing sectors " 380 "> %u\n", drive->name, 1 << 28); 381 } else 382 drive->dev_flags &= ~IDE_DFLAG_LBA48; 383 } 384 385 return 0; 386} 387 388static void idedisk_prepare_flush(struct request_queue *q, struct request *rq) 389{ 390 ide_drive_t *drive = q->queuedata; 391 struct ide_cmd *cmd = kmalloc(sizeof(*cmd), GFP_ATOMIC); 392 393 /* FIXME: map struct ide_taskfile on rq->cmd[] */ 394 BUG_ON(cmd == NULL); 395 396 memset(cmd, 0, sizeof(*cmd)); 397 if (ata_id_flush_ext_enabled(drive->id) && 398 (drive->capacity64 >= (1UL << 28))) 399 cmd->tf.command = ATA_CMD_FLUSH_EXT; 400 else 401 cmd->tf.command = ATA_CMD_FLUSH; 402 cmd->tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE | 403 IDE_TFLAG_DYN; 404 cmd->data_phase = TASKFILE_NO_DATA; 405 406 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 407 rq->cmd_flags |= REQ_SOFTBARRIER; 408 rq->special = cmd; 409} 410 411ide_devset_get(multcount, mult_count); 412 413/* 414 * This is tightly woven into the driver->do_special can not touch. 415 * DON'T do it again until a total personality rewrite is committed. 416 */ 417static int set_multcount(ide_drive_t *drive, int arg) 418{ 419 struct request *rq; 420 int error; 421 422 if (arg < 0 || arg > (drive->id[ATA_ID_MAX_MULTSECT] & 0xff)) 423 return -EINVAL; 424 425 if (drive->special.b.set_multmode) 426 return -EBUSY; 427 428 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 429 rq->cmd_type = REQ_TYPE_ATA_TASKFILE; 430 431 drive->mult_req = arg; 432 drive->special.b.set_multmode = 1; 433 error = blk_execute_rq(drive->queue, NULL, rq, 0); 434 blk_put_request(rq); 435 436 return (drive->mult_count == arg) ? 0 : -EIO; 437} 438 439ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR); 440 441static int set_nowerr(ide_drive_t *drive, int arg) 442{ 443 if (arg < 0 || arg > 1) 444 return -EINVAL; 445 446 if (arg) 447 drive->dev_flags |= IDE_DFLAG_NOWERR; 448 else 449 drive->dev_flags &= ~IDE_DFLAG_NOWERR; 450 451 drive->bad_wstat = arg ? BAD_R_STAT : BAD_W_STAT; 452 453 return 0; 454} 455 456static int ide_do_setfeature(ide_drive_t *drive, u8 feature, u8 nsect) 457{ 458 struct ide_cmd cmd; 459 460 memset(&cmd, 0, sizeof(cmd)); 461 cmd.tf.feature = feature; 462 cmd.tf.nsect = nsect; 463 cmd.tf.command = ATA_CMD_SET_FEATURES; 464 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 465 466 return ide_no_data_taskfile(drive, &cmd); 467} 468 469static void update_ordered(ide_drive_t *drive) 470{ 471 u16 *id = drive->id; 472 unsigned ordered = QUEUE_ORDERED_NONE; 473 prepare_flush_fn *prep_fn = NULL; 474 475 if (drive->dev_flags & IDE_DFLAG_WCACHE) { 476 unsigned long long capacity; 477 int barrier; 478 /* 479 * We must avoid issuing commands a drive does not 480 * understand or we may crash it. We check flush cache 481 * is supported. We also check we have the LBA48 flush 482 * cache if the drive capacity is too large. By this 483 * time we have trimmed the drive capacity if LBA48 is 484 * not available so we don't need to recheck that. 485 */ 486 capacity = ide_gd_capacity(drive); 487 barrier = ata_id_flush_enabled(id) && 488 (drive->dev_flags & IDE_DFLAG_NOFLUSH) == 0 && 489 ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 || 490 capacity <= (1ULL << 28) || 491 ata_id_flush_ext_enabled(id)); 492 493 printk(KERN_INFO "%s: cache flushes %ssupported\n", 494 drive->name, barrier ? "" : "not "); 495 496 if (barrier) { 497 ordered = QUEUE_ORDERED_DRAIN_FLUSH; 498 prep_fn = idedisk_prepare_flush; 499 } 500 } else 501 ordered = QUEUE_ORDERED_DRAIN; 502 503 blk_queue_ordered(drive->queue, ordered, prep_fn); 504} 505 506ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE); 507 508static int set_wcache(ide_drive_t *drive, int arg) 509{ 510 int err = 1; 511 512 if (arg < 0 || arg > 1) 513 return -EINVAL; 514 515 if (ata_id_flush_enabled(drive->id)) { 516 err = ide_do_setfeature(drive, 517 arg ? SETFEATURES_WC_ON : SETFEATURES_WC_OFF, 0); 518 if (err == 0) { 519 if (arg) 520 drive->dev_flags |= IDE_DFLAG_WCACHE; 521 else 522 drive->dev_flags &= ~IDE_DFLAG_WCACHE; 523 } 524 } 525 526 update_ordered(drive); 527 528 return err; 529} 530 531static int do_idedisk_flushcache(ide_drive_t *drive) 532{ 533 struct ide_cmd cmd; 534 535 memset(&cmd, 0, sizeof(cmd)); 536 if (ata_id_flush_ext_enabled(drive->id)) 537 cmd.tf.command = ATA_CMD_FLUSH_EXT; 538 else 539 cmd.tf.command = ATA_CMD_FLUSH; 540 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 541 542 return ide_no_data_taskfile(drive, &cmd); 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 struct request_queue *q = drive->queue; 604 ide_hwif_t *hwif = drive->hwif; 605 u16 *id = drive->id; 606 char *m = (char *)&id[ATA_ID_PROD]; 607 unsigned long long capacity; 608 609 ide_proc_register_driver(drive, idkp->driver); 610 611 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) 612 return; 613 614 if (drive->dev_flags & IDE_DFLAG_REMOVABLE) { 615 /* 616 * Removable disks (eg. SYQUEST); ignore 'WD' drives 617 */ 618 if (m[0] != 'W' || m[1] != 'D') 619 drive->dev_flags |= IDE_DFLAG_DOORLOCKING; 620 } 621 622 (void)set_addressing(drive, 1); 623 624 if (drive->dev_flags & IDE_DFLAG_LBA48) { 625 int max_s = 2048; 626 627 if (max_s > hwif->rqsize) 628 max_s = hwif->rqsize; 629 630 blk_queue_max_sectors(q, max_s); 631 } 632 633 printk(KERN_INFO "%s: max request size: %dKiB\n", drive->name, 634 q->max_sectors / 2); 635 636 if (ata_id_is_ssd(id)) 637 queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q); 638 639 /* calculate drive capacity, and select LBA if possible */ 640 ide_disk_get_capacity(drive); 641 642 /* 643 * if possible, give fdisk access to more of the drive, 644 * by correcting bios_cyls: 645 */ 646 capacity = ide_gd_capacity(drive); 647 648 if ((drive->dev_flags & IDE_DFLAG_FORCED_GEOM) == 0) { 649 if (ata_id_lba48_enabled(drive->id)) { 650 /* compatibility */ 651 drive->bios_sect = 63; 652 drive->bios_head = 255; 653 } 654 655 if (drive->bios_sect && drive->bios_head) { 656 unsigned int cap0 = capacity; /* truncate to 32 bits */ 657 unsigned int cylsz, cyl; 658 659 if (cap0 != capacity) 660 drive->bios_cyl = 65535; 661 else { 662 cylsz = drive->bios_sect * drive->bios_head; 663 cyl = cap0 / cylsz; 664 if (cyl > 65535) 665 cyl = 65535; 666 if (cyl > drive->bios_cyl) 667 drive->bios_cyl = cyl; 668 } 669 } 670 } 671 printk(KERN_INFO "%s: %llu sectors (%llu MB)", 672 drive->name, capacity, sectors_to_MB(capacity)); 673 674 /* Only print cache size when it was specified */ 675 if (id[ATA_ID_BUF_SIZE]) 676 printk(KERN_CONT " w/%dKiB Cache", id[ATA_ID_BUF_SIZE] / 2); 677 678 printk(KERN_CONT ", CHS=%d/%d/%d\n", 679 drive->bios_cyl, drive->bios_head, drive->bios_sect); 680 681 /* write cache enabled? */ 682 if ((id[ATA_ID_CSFO] & 1) || ata_id_wcache_enabled(id)) 683 drive->dev_flags |= IDE_DFLAG_WCACHE; 684 685 set_wcache(drive, 1); 686 687 if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 && 688 (drive->head == 0 || drive->head > 16)) { 689 printk(KERN_ERR "%s: invalid geometry: %d physical heads?\n", 690 drive->name, drive->head); 691 drive->dev_flags &= ~IDE_DFLAG_ATTACH; 692 } else 693 drive->dev_flags |= IDE_DFLAG_ATTACH; 694} 695 696static void ide_disk_flush(ide_drive_t *drive) 697{ 698 if (ata_id_flush_enabled(drive->id) == 0 || 699 (drive->dev_flags & IDE_DFLAG_WCACHE) == 0) 700 return; 701 702 if (do_idedisk_flushcache(drive)) 703 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name); 704} 705 706static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk) 707{ 708 return 0; 709} 710 711static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk, 712 int on) 713{ 714 struct ide_cmd cmd; 715 int ret; 716 717 if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0) 718 return 0; 719 720 memset(&cmd, 0, sizeof(cmd)); 721 cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK; 722 cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE; 723 724 ret = ide_no_data_taskfile(drive, &cmd); 725 726 if (ret) 727 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING; 728 729 return ret; 730} 731 732const struct ide_disk_ops ide_ata_disk_ops = { 733 .check = ide_disk_check, 734 .get_capacity = ide_disk_get_capacity, 735 .setup = ide_disk_setup, 736 .flush = ide_disk_flush, 737 .init_media = ide_disk_init_media, 738 .set_doorlock = ide_disk_set_doorlock, 739 .do_request = ide_do_rw_disk, 740 .ioctl = ide_disk_ioctl, 741}; 742