linux/drivers/ide/ide-disk.c
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   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)blk_rq_sectors(rq);
  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 + blk_rq_sectors(rq) > 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->nsect  = nsectors & 0xff;
 109                        tf->lbal   = (u8) block;
 110                        tf->lbam   = (u8)(block >>  8);
 111                        tf->lbah   = (u8)(block >> 16);
 112                        tf->device = ATA_LBA;
 113
 114                        tf = &cmd.hob;
 115                        tf->nsect = (nsectors >> 8) & 0xff;
 116                        tf->lbal  = (u8)(block >> 24);
 117                        if (sizeof(block) != 4) {
 118                                tf->lbam = (u8)((u64)block >> 32);
 119                                tf->lbah = (u8)((u64)block >> 40);
 120                        }
 121
 122                        cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 123                        cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 124                        cmd.tf_flags |= IDE_TFLAG_LBA48;
 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) | ATA_LBA;
 131                }
 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        BUG_ON(rq->cmd_type != REQ_TYPE_FS);
 188
 189        ledtrig_disk_activity();
 190
 191        pr_debug("%s: %sing: block=%llu, sectors=%u\n",
 192                 drive->name, rq_data_dir(rq) == READ ? "read" : "writ",
 193                 (unsigned long long)block, blk_rq_sectors(rq));
 194
 195        if (hwif->rw_disk)
 196                hwif->rw_disk(drive, rq);
 197
 198        return __ide_do_rw_disk(drive, rq, block);
 199}
 200
 201/*
 202 * Queries for true maximum capacity of the drive.
 203 * Returns maximum LBA address (> 0) of the drive, 0 if failed.
 204 */
 205static u64 idedisk_read_native_max_address(ide_drive_t *drive, int lba48)
 206{
 207        struct ide_cmd cmd;
 208        struct ide_taskfile *tf = &cmd.tf;
 209        u64 addr = 0;
 210
 211        memset(&cmd, 0, sizeof(cmd));
 212        if (lba48)
 213                tf->command = ATA_CMD_READ_NATIVE_MAX_EXT;
 214        else
 215                tf->command = ATA_CMD_READ_NATIVE_MAX;
 216        tf->device  = ATA_LBA;
 217
 218        cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 219        cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 220        if (lba48) {
 221                cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 222                cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 223                cmd.tf_flags = IDE_TFLAG_LBA48;
 224        }
 225
 226        ide_no_data_taskfile(drive, &cmd);
 227
 228        /* if OK, compute maximum address value */
 229        if (!(tf->status & ATA_ERR))
 230                addr = ide_get_lba_addr(&cmd, lba48) + 1;
 231
 232        return addr;
 233}
 234
 235/*
 236 * Sets maximum virtual LBA address of the drive.
 237 * Returns new maximum virtual LBA address (> 0) or 0 on failure.
 238 */
 239static u64 idedisk_set_max_address(ide_drive_t *drive, u64 addr_req, int lba48)
 240{
 241        struct ide_cmd cmd;
 242        struct ide_taskfile *tf = &cmd.tf;
 243        u64 addr_set = 0;
 244
 245        addr_req--;
 246
 247        memset(&cmd, 0, sizeof(cmd));
 248        tf->lbal     = (addr_req >>  0) & 0xff;
 249        tf->lbam     = (addr_req >>= 8) & 0xff;
 250        tf->lbah     = (addr_req >>= 8) & 0xff;
 251        if (lba48) {
 252                cmd.hob.lbal = (addr_req >>= 8) & 0xff;
 253                cmd.hob.lbam = (addr_req >>= 8) & 0xff;
 254                cmd.hob.lbah = (addr_req >>= 8) & 0xff;
 255                tf->command  = ATA_CMD_SET_MAX_EXT;
 256        } else {
 257                tf->device   = (addr_req >>= 8) & 0x0f;
 258                tf->command  = ATA_CMD_SET_MAX;
 259        }
 260        tf->device |= ATA_LBA;
 261
 262        cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
 263        cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
 264        if (lba48) {
 265                cmd.valid.out.hob = IDE_VALID_OUT_HOB;
 266                cmd.valid.in.hob  = IDE_VALID_IN_HOB;
 267                cmd.tf_flags = IDE_TFLAG_LBA48;
 268        }
 269
 270        ide_no_data_taskfile(drive, &cmd);
 271
 272        /* if OK, compute maximum address value */
 273        if (!(tf->status & ATA_ERR))
 274                addr_set = ide_get_lba_addr(&cmd, lba48) + 1;
 275
 276        return addr_set;
 277}
 278
 279static unsigned long long sectors_to_MB(unsigned long long n)
 280{
 281        n <<= 9;                /* make it bytes */
 282        do_div(n, 1000000);     /* make it MB */
 283        return n;
 284}
 285
 286/*
 287 * Some disks report total number of sectors instead of
 288 * maximum sector address.  We list them here.
 289 */
 290static const struct drive_list_entry hpa_list[] = {
 291        { "ST340823A",  NULL },
 292        { "ST320413A",  NULL },
 293        { "ST310211A",  NULL },
 294        { NULL,         NULL }
 295};
 296
 297static u64 ide_disk_hpa_get_native_capacity(ide_drive_t *drive, int lba48)
 298{
 299        u64 capacity, set_max;
 300
 301        capacity = drive->capacity64;
 302        set_max  = idedisk_read_native_max_address(drive, lba48);
 303
 304        if (ide_in_drive_list(drive->id, hpa_list)) {
 305                /*
 306                 * Since we are inclusive wrt to firmware revisions do this
 307                 * extra check and apply the workaround only when needed.
 308                 */
 309                if (set_max == capacity + 1)
 310                        set_max--;
 311        }
 312
 313        return set_max;
 314}
 315
 316static u64 ide_disk_hpa_set_capacity(ide_drive_t *drive, u64 set_max, int lba48)
 317{
 318        set_max = idedisk_set_max_address(drive, set_max, lba48);
 319        if (set_max)
 320                drive->capacity64 = set_max;
 321
 322        return set_max;
 323}
 324
 325static void idedisk_check_hpa(ide_drive_t *drive)
 326{
 327        u64 capacity, set_max;
 328        int lba48 = ata_id_lba48_enabled(drive->id);
 329
 330        capacity = drive->capacity64;
 331        set_max  = ide_disk_hpa_get_native_capacity(drive, lba48);
 332
 333        if (set_max <= capacity)
 334                return;
 335
 336        drive->probed_capacity = set_max;
 337
 338        printk(KERN_INFO "%s: Host Protected Area detected.\n"
 339                         "\tcurrent capacity is %llu sectors (%llu MB)\n"
 340                         "\tnative  capacity is %llu sectors (%llu MB)\n",
 341                         drive->name,
 342                         capacity, sectors_to_MB(capacity),
 343                         set_max, sectors_to_MB(set_max));
 344
 345        if ((drive->dev_flags & IDE_DFLAG_NOHPA) == 0)
 346                return;
 347
 348        set_max = ide_disk_hpa_set_capacity(drive, set_max, lba48);
 349        if (set_max)
 350                printk(KERN_INFO "%s: Host Protected Area disabled.\n",
 351                                 drive->name);
 352}
 353
 354static int ide_disk_get_capacity(ide_drive_t *drive)
 355{
 356        u16 *id = drive->id;
 357        int lba;
 358
 359        if (ata_id_lba48_enabled(id)) {
 360                /* drive speaks 48-bit LBA */
 361                lba = 1;
 362                drive->capacity64 = ata_id_u64(id, ATA_ID_LBA_CAPACITY_2);
 363        } else if (ata_id_has_lba(id) && ata_id_is_lba_capacity_ok(id)) {
 364                /* drive speaks 28-bit LBA */
 365                lba = 1;
 366                drive->capacity64 = ata_id_u32(id, ATA_ID_LBA_CAPACITY);
 367        } else {
 368                /* drive speaks boring old 28-bit CHS */
 369                lba = 0;
 370                drive->capacity64 = drive->cyl * drive->head * drive->sect;
 371        }
 372
 373        drive->probed_capacity = drive->capacity64;
 374
 375        if (lba) {
 376                drive->dev_flags |= IDE_DFLAG_LBA;
 377
 378                /*
 379                * If this device supports the Host Protected Area feature set,
 380                * then we may need to change our opinion about its capacity.
 381                */
 382                if (ata_id_hpa_enabled(id))
 383                        idedisk_check_hpa(drive);
 384        }
 385
 386        /* limit drive capacity to 137GB if LBA48 cannot be used */
 387        if ((drive->dev_flags & IDE_DFLAG_LBA48) == 0 &&
 388            drive->capacity64 > 1ULL << 28) {
 389                printk(KERN_WARNING "%s: cannot use LBA48 - full capacity "
 390                       "%llu sectors (%llu MB)\n",
 391                       drive->name, (unsigned long long)drive->capacity64,
 392                       sectors_to_MB(drive->capacity64));
 393                drive->probed_capacity = drive->capacity64 = 1ULL << 28;
 394        }
 395
 396        if ((drive->hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA) &&
 397            (drive->dev_flags & IDE_DFLAG_LBA48)) {
 398                if (drive->capacity64 > 1ULL << 28) {
 399                        printk(KERN_INFO "%s: cannot use LBA48 DMA - PIO mode"
 400                                         " will be used for accessing sectors "
 401                                         "> %u\n", drive->name, 1 << 28);
 402                } else
 403                        drive->dev_flags &= ~IDE_DFLAG_LBA48;
 404        }
 405
 406        return 0;
 407}
 408
 409static void ide_disk_unlock_native_capacity(ide_drive_t *drive)
 410{
 411        u16 *id = drive->id;
 412        int lba48 = ata_id_lba48_enabled(id);
 413
 414        if ((drive->dev_flags & IDE_DFLAG_LBA) == 0 ||
 415            ata_id_hpa_enabled(id) == 0)
 416                return;
 417
 418        /*
 419         * according to the spec the SET MAX ADDRESS command shall be
 420         * immediately preceded by a READ NATIVE MAX ADDRESS command
 421         */
 422        if (!ide_disk_hpa_get_native_capacity(drive, lba48))
 423                return;
 424
 425        if (ide_disk_hpa_set_capacity(drive, drive->probed_capacity, lba48))
 426                drive->dev_flags |= IDE_DFLAG_NOHPA; /* disable HPA on resume */
 427}
 428
 429static int idedisk_prep_fn(struct request_queue *q, struct request *rq)
 430{
 431        ide_drive_t *drive = q->queuedata;
 432        struct ide_cmd *cmd;
 433
 434        if (req_op(rq) != REQ_OP_FLUSH)
 435                return BLKPREP_OK;
 436
 437        if (rq->special) {
 438                cmd = 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
 456        rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 457        rq->special = cmd;
 458        cmd->rq = rq;
 459
 460        return BLKPREP_OK;
 461}
 462
 463ide_devset_get(multcount, mult_count);
 464
 465/*
 466 * This is tightly woven into the driver->do_special can not touch.
 467 * DON'T do it again until a total personality rewrite is committed.
 468 */
 469static int set_multcount(ide_drive_t *drive, int arg)
 470{
 471        struct request *rq;
 472        int error;
 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, READ, __GFP_RECLAIM);
 481        rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 482
 483        drive->mult_req = arg;
 484        drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
 485        error = 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                        blk_queue_prep_rq(drive->queue, idedisk_prep_fn);
 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                queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
 690                queue_flag_clear_unlocked(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
 750static 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
 760static int ide_disk_init_media(ide_drive_t *drive, struct gendisk *disk)
 761{
 762        return 0;
 763}
 764
 765static 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
 787const 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};
 798