drivers/ide/ide-disk.c

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This source file includes following definitions.
ide_tf_set_cmd
__ide_do_rw_disk
ide_do_rw_disk
idedisk_read_native_max_address
idedisk_set_max_address
sectors_to_MB
ide_disk_hpa_get_native_capacity
ide_disk_hpa_set_capacity
idedisk_check_hpa
ide_disk_get_capacity
ide_disk_unlock_native_capacity
idedisk_prep_rq
set_multcount
set_nowerr
ide_do_setfeature
update_flush
set_wcache
do_idedisk_flushcache
set_acoustic
set_addressing
ide_disk_check
ide_disk_setup
ide_disk_flush
ide_disk_init_media
ide_disk_set_doorlock
   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 
  41 static 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 
  56 static 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  */
  82 static 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 
 182 static 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  */
 206 static 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  */
 240 static 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 
 280 static 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  */
 291 static const struct drive_list_entry hpa_list[] = {
 292         { "ST340823A",  NULL },
 293         { "ST320413A",  NULL },
 294         { "ST310211A",  NULL },
 295         { NULL,         NULL }
 296 };
 297 
 298 static 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 
 317 static 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 
 326 static 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 
 355 static 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 
 410 static 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 
 430 static 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 
 464 ide_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  */
 470 static 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 
 491 ide_devset_get_flag(nowerr, IDE_DFLAG_NOWERR);
 492 
 493 static 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 
 508 static 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 
 522 static 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 
 557 ide_devset_get_flag(wcache, IDE_DFLAG_WCACHE);
 558 
 559 static 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 
 582 static 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 
 597 ide_devset_get(acoustic, acoustic);
 598 
 599 static 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 
 612 ide_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  */
 620 static 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 
 640 ide_ext_devset_rw(acoustic, acoustic);
 641 ide_ext_devset_rw(address, addressing);
 642 ide_ext_devset_rw(multcount, multcount);
 643 ide_ext_devset_rw(wcache, wcache);
 644 
 645 ide_ext_devset_rw_sync(nowerr, nowerr);
 646 
 647 static int ide_disk_check(ide_drive_t *drive, const char *s)
 648 {
 649         return 1;
 650 }
 651 
 652 static 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                 drive->dev_flags &= ~IDE_DFLAG_ATTACH;
 746         } else
 747                 drive->dev_flags |= IDE_DFLAG_ATTACH;
 748 }
 749 
 750 static void ide_disk_flush(ide_drive_t *drive)
 751 {
 752         if (ata_id_flush_enabled(drive->id) == 0 ||
 753             (drive->dev_flags & IDE_DFLAG_WCACHE) == 0)
 754                 return;
 755 
 756         if (do_idedisk_flushcache(drive))
 757                 printk(KERN_INFO "%s: wcache flush failed!\n", drive->name);
 758 }
 759 
 760 static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 761 {
 762         return 0;
 763 }
 764 
 765 static int ide_disk_set_doorlock(ide_drive_t *drive, struct gendisk *disk,
 766                                  int on)
 767 {
 768         struct ide_cmd cmd;
 769         int ret;
 770 
 771         if ((drive->dev_flags & IDE_DFLAG_DOORLOCKING) == 0)
 772                 return 0;
 773 
 774         memset(&cmd, 0, sizeof(cmd));
 775         cmd.tf.command = on ? ATA_CMD_MEDIA_LOCK : ATA_CMD_MEDIA_UNLOCK;
 776         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 777         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 778 
 779         ret = ide_no_data_taskfile(drive, &cmd);
 780 
 781         if (ret)
 782                 drive->dev_flags &= ~IDE_DFLAG_DOORLOCKING;
 783 
 784         return ret;
 785 }
 786 
 787 const struct ide_disk_ops ide_ata_disk_ops = {
 788         .check                  = ide_disk_check,
 789         .unlock_native_capacity = ide_disk_unlock_native_capacity,
 790         .get_capacity           = ide_disk_get_capacity,
 791         .setup                  = ide_disk_setup,
 792         .flush                  = ide_disk_flush,
 793         .init_media             = ide_disk_init_media,
 794         .set_doorlock           = ide_disk_set_doorlock,
 795         .do_request             = ide_do_rw_disk,
 796         .ioctl                  = ide_disk_ioctl,
 797 };
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/ide/ide-disk.c

DEFINITIONS
