drivers/ide/ide-taskfile.c

   1 /*
   2  *  Copyright (C) 2000-2002        Michael Cornwell <cornwell@acm.org>
   3  *  Copyright (C) 2000-2002        Andre Hedrick <andre@linux-ide.org>
   4  *  Copyright (C) 2001-2002        Klaus Smolin
   5  *                                      IBM Storage Technology Division
   6  *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
   7  *
   8  *  The big the bad and the ugly.
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/string.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/errno.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/hdreg.h>
  20 #include <linux/ide.h>
  21 #include <linux/scatterlist.h>
  22
  23 #include <asm/uaccess.h>
  24 #include <asm/io.h>
  25
  26 void ide_tf_dump(const char *s, struct ide_taskfile *tf)
  27 {
  28 #ifdef DEBUG
  29         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  30                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  31                 s, tf->feature, tf->nsect, tf->lbal,
  32                 tf->lbam, tf->lbah, tf->device, tf->command);
  33         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  34                 "lbam 0x%02x lbah 0x%02x\n",
  35                 s, tf->hob_nsect, tf->hob_lbal,
  36                 tf->hob_lbam, tf->hob_lbah);
  37 #endif
  38 }
  39
  40 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  41 {
  42         ide_task_t args;
  43
  44         memset(&args, 0, sizeof(ide_task_t));
  45         args.tf.nsect = 0x01;
  46         if (drive->media == ide_disk)
  47                 args.tf.command = ATA_CMD_ID_ATA;
  48         else
  49                 args.tf.command = ATA_CMD_ID_ATAPI;
  50         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
  51         args.data_phase = TASKFILE_IN;
  52         return ide_raw_taskfile(drive, &args, buf, 1);
  53 }
  54
  55 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  56 static ide_startstop_t set_geometry_intr(ide_drive_t *);
  57 static ide_startstop_t recal_intr(ide_drive_t *);
  58 static ide_startstop_t set_multmode_intr(ide_drive_t *);
  59 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
  60 static ide_startstop_t task_in_intr(ide_drive_t *);
  61
  62 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
  63 {
  64         ide_hwif_t *hwif        = HWIF(drive);
  65         struct ide_taskfile *tf = &task->tf;
  66         ide_handler_t *handler = NULL;
  67         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  68         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  69
  70         if (task->data_phase == TASKFILE_MULTI_IN ||
  71             task->data_phase == TASKFILE_MULTI_OUT) {
  72                 if (!drive->mult_count) {
  73                         printk(KERN_ERR "%s: multimode not set!\n",
  74                                         drive->name);
  75                         return ide_stopped;
  76                 }
  77         }
  78
  79         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  80                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
  81
  82         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  83                 ide_tf_dump(drive->name, tf);
  84                 tp_ops->set_irq(hwif, 1);
  85                 SELECT_MASK(drive, 0);
  86                 tp_ops->tf_load(drive, task);
  87         }
  88
  89         switch (task->data_phase) {
  90         case TASKFILE_MULTI_OUT:
  91         case TASKFILE_OUT:
  92                 tp_ops->exec_command(hwif, tf->command);
  93                 ndelay(400);    /* FIXME */
  94                 return pre_task_out_intr(drive, task->rq);
  95         case TASKFILE_MULTI_IN:
  96         case TASKFILE_IN:
  97                 handler = task_in_intr;
  98                 /* fall-through */
  99         case TASKFILE_NO_DATA:
 100                 if (handler == NULL)
 101                         handler = task_no_data_intr;
 102                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 103                         switch (tf->command) {
 104                         case ATA_CMD_INIT_DEV_PARAMS:
 105                                 handler = set_geometry_intr;
 106                                 break;
 107                         case ATA_CMD_RESTORE:
 108                                 handler = recal_intr;
 109                                 break;
 110                         case ATA_CMD_SET_MULTI:
 111                                 handler = set_multmode_intr;
 112                                 break;
 113                         }
 114                 }
 115                 ide_execute_command(drive, tf->command, handler,
 116                                     WAIT_WORSTCASE, NULL);
 117                 return ide_started;
 118         default:
 119                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 120                     dma_ops->dma_setup(drive))
 121                         return ide_stopped;
 122                 dma_ops->dma_exec_cmd(drive, tf->command);
 123                 dma_ops->dma_start(drive);
 124                 return ide_started;
 125         }
 126 }
 127 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 128
 129 /*
 130  * set_multmode_intr() is invoked on completion of a ATA_CMD_SET_MULTI cmd.
 131  */
 132 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 133 {
 134         ide_hwif_t *hwif = drive->hwif;
 135         u8 stat;
 136
 137         local_irq_enable_in_hardirq();
 138         stat = hwif->tp_ops->read_status(hwif);
 139
 140         if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
 141                 drive->mult_count = drive->mult_req;
 142         else {
 143                 drive->mult_req = drive->mult_count = 0;
 144                 drive->special.b.recalibrate = 1;
 145                 (void) ide_dump_status(drive, "set_multmode", stat);
 146         }
 147         return ide_stopped;
 148 }
 149
 150 /*
 151  * set_geometry_intr() is invoked on completion of a ATA_CMD_INIT_DEV_PARAMS cmd.
 152  */
 153 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 154 {
 155         ide_hwif_t *hwif = drive->hwif;
 156         int retries = 5;
 157         u8 stat;
 158
 159         local_irq_enable_in_hardirq();
 160
 161         while (1) {
 162                 stat = hwif->tp_ops->read_status(hwif);
 163                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 164                         break;
 165                 udelay(10);
 166         };
 167
 168         if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
 169                 return ide_stopped;
 170
 171         if (stat & (ATA_ERR | ATA_DRQ))
 172                 return ide_error(drive, "set_geometry_intr", stat);
 173
 174         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 175         return ide_started;
 176 }
 177
 178 /*
 179  * recal_intr() is invoked on completion of a ATA_CMD_RESTORE (recalibrate) cmd.
 180  */
 181 static ide_startstop_t recal_intr(ide_drive_t *drive)
 182 {
 183         ide_hwif_t *hwif = drive->hwif;
 184         u8 stat;
 185
 186         local_irq_enable_in_hardirq();
 187         stat = hwif->tp_ops->read_status(hwif);
 188
 189         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
 190                 return ide_error(drive, "recal_intr", stat);
 191         return ide_stopped;
 192 }
 193
 194 /*
 195  * Handler for commands without a data phase
 196  */
 197 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 198 {
 199         ide_hwif_t *hwif = drive->hwif;
 200         ide_task_t *args = hwif->hwgroup->rq->special;
 201         u8 stat;
 202
 203         local_irq_enable_in_hardirq();
 204         stat = hwif->tp_ops->read_status(hwif);
 205
 206         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
 207                 return ide_error(drive, "task_no_data_intr", stat);
 208                 /* calls ide_end_drive_cmd */
 209
 210         if (args)
 211                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 212
 213         return ide_stopped;
 214 }
 215
 216 static u8 wait_drive_not_busy(ide_drive_t *drive)
 217 {
 218         ide_hwif_t *hwif = drive->hwif;
 219         int retries;
 220         u8 stat;
 221
 222         /*
 223          * Last sector was transfered, wait until device is ready.  This can
 224          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 225          */
 226         for (retries = 0; retries < 1000; retries++) {
 227                 stat = hwif->tp_ops->read_status(hwif);
 228
 229                 if (stat & ATA_BUSY)
 230                         udelay(10);
 231                 else
 232                         break;
 233         }
 234
 235         if (stat & ATA_BUSY)
 236                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 237
 238         return stat;
 239 }
 240
 241 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 242                            unsigned int write)
 243 {
 244         ide_hwif_t *hwif = drive->hwif;
 245         struct scatterlist *sg = hwif->sg_table;
 246         struct scatterlist *cursg = hwif->cursg;
 247         struct page *page;
 248 #ifdef CONFIG_HIGHMEM
 249         unsigned long flags;
 250 #endif
 251         unsigned int offset;
 252         u8 *buf;
 253
 254         cursg = hwif->cursg;
 255         if (!cursg) {
 256                 cursg = sg;
 257                 hwif->cursg = sg;
 258         }
 259
 260         page = sg_page(cursg);
 261         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 262
 263         /* get the current page and offset */
 264         page = nth_page(page, (offset >> PAGE_SHIFT));
 265         offset %= PAGE_SIZE;
 266
 267 #ifdef CONFIG_HIGHMEM
 268         local_irq_save(flags);
 269 #endif
 270         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 271
 272         hwif->nleft--;
 273         hwif->cursg_ofs++;
 274
 275         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 276                 hwif->cursg = sg_next(hwif->cursg);
 277                 hwif->cursg_ofs = 0;
 278         }
 279
 280         /* do the actual data transfer */
 281         if (write)
 282                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 283         else
 284                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 285
 286         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 287 #ifdef CONFIG_HIGHMEM
 288         local_irq_restore(flags);
 289 #endif
 290 }
 291
 292 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 293                           unsigned int write)
 294 {
 295         unsigned int nsect;
 296
 297         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 298         while (nsect--)
 299                 ide_pio_sector(drive, rq, write);
 300 }
 301
 302 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 303                                      unsigned int write)
 304 {
 305         u8 saved_io_32bit = drive->io_32bit;
 306
 307         if (rq->bio)    /* fs request */
 308                 rq->errors = 0;
 309
 310         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 311                 ide_task_t *task = rq->special;
 312
 313                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 314                         drive->io_32bit = 0;
 315         }
 316
 317         touch_softlockup_watchdog();
 318
 319         switch (drive->hwif->data_phase) {
 320         case TASKFILE_MULTI_IN:
 321         case TASKFILE_MULTI_OUT:
 322                 ide_pio_multi(drive, rq, write);
 323                 break;
 324         default:
 325                 ide_pio_sector(drive, rq, write);
 326                 break;
 327         }
 328
 329         drive->io_32bit = saved_io_32bit;
 330 }
 331
 332 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 333                                   const char *s, u8 stat)
 334 {
 335         if (rq->bio) {
 336                 ide_hwif_t *hwif = drive->hwif;
 337                 int sectors = hwif->nsect - hwif->nleft;
 338
 339                 switch (hwif->data_phase) {
 340                 case TASKFILE_IN:
 341                         if (hwif->nleft)
 342                                 break;
 343                         /* fall through */
 344                 case TASKFILE_OUT:
 345                         sectors--;
 346                         break;
 347                 case TASKFILE_MULTI_IN:
 348                         if (hwif->nleft)
 349                                 break;
 350                         /* fall through */
 351                 case TASKFILE_MULTI_OUT:
 352                         sectors -= drive->mult_count;
 353                 default:
 354                         break;
 355                 }
 356
 357                 if (sectors > 0) {
 358                         ide_driver_t *drv;
 359
 360                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 361                         drv->end_request(drive, 1, sectors);
 362                 }
 363         }
 364         return ide_error(drive, s, stat);
 365 }
 366
 367 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 368 {
 369         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 370                 u8 err = ide_read_error(drive);
 371
 372                 ide_end_drive_cmd(drive, stat, err);
 373                 return;
 374         }
 375
 376         if (rq->rq_disk) {
 377                 ide_driver_t *drv;
 378
 379                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 380                 drv->end_request(drive, 1, rq->nr_sectors);
 381         } else
 382                 ide_end_request(drive, 1, rq->nr_sectors);
 383 }
 384
 385 /*
 386  * We got an interrupt on a task_in case, but no errors and no DRQ.
 387  *
 388  * It might be a spurious irq (shared irq), but it might be a
 389  * command that had no output.
 390  */
 391 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 392 {
 393         /* Command all done? */
 394         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 395                 task_end_request(drive, rq, stat);
 396                 return ide_stopped;
 397         }
 398
 399         /* Assume it was a spurious irq */
 400         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 401         return ide_started;
 402 }
 403
 404 /*
 405  * Handler for command with PIO data-in phase (Read/Read Multiple).
 406  */
 407 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 408 {
 409         ide_hwif_t *hwif = drive->hwif;
 410         struct request *rq = hwif->hwgroup->rq;
 411         u8 stat = hwif->tp_ops->read_status(hwif);
 412
 413         /* Error? */
 414         if (stat & ATA_ERR)
 415                 return task_error(drive, rq, __func__, stat);
 416
 417         /* Didn't want any data? Odd. */
 418         if ((stat & ATA_DRQ) == 0)
 419                 return task_in_unexpected(drive, rq, stat);
 420
 421         ide_pio_datablock(drive, rq, 0);
 422
 423         /* Are we done? Check status and finish transfer. */
 424         if (!hwif->nleft) {
 425                 stat = wait_drive_not_busy(drive);
 426                 if (!OK_STAT(stat, 0, BAD_STAT))
 427                         return task_error(drive, rq, __func__, stat);
 428                 task_end_request(drive, rq, stat);
 429                 return ide_stopped;
 430         }
 431
 432         /* Still data left to transfer. */
 433         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 434
 435         return ide_started;
 436 }
 437
 438 /*
 439  * Handler for command with PIO data-out phase (Write/Write Multiple).
 440  */
 441 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 442 {
 443         ide_hwif_t *hwif = drive->hwif;
 444         struct request *rq = HWGROUP(drive)->rq;
 445         u8 stat = hwif->tp_ops->read_status(hwif);
 446
 447         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 448                 return task_error(drive, rq, __func__, stat);
 449
 450         /* Deal with unexpected ATA data phase. */
 451         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 452                 return task_error(drive, rq, __func__, stat);
 453
 454         if (!hwif->nleft) {
 455                 task_end_request(drive, rq, stat);
 456                 return ide_stopped;
 457         }
 458
 459         /* Still data left to transfer. */
 460         ide_pio_datablock(drive, rq, 1);
 461         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 462
 463         return ide_started;
 464 }
 465
 466 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 467 {
 468         ide_startstop_t startstop;
 469
 470         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 471                           drive->bad_wstat, WAIT_DRQ)) {
 472                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 473                         drive->name, drive->hwif->data_phase ? "MULT" : "",
 474                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 475                 return startstop;
 476         }
 477
 478         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 479                 local_irq_disable();
 480
 481         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 482         ide_pio_datablock(drive, rq, 1);
 483
 484         return ide_started;
 485 }
 486
 487 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 488 {
 489         struct request *rq;
 490         int error;
 491
 492         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 493         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 494         rq->buffer = buf;
 495
 496         /*
 497          * (ks) We transfer currently only whole sectors.
 498          * This is suffient for now.  But, it would be great,
 499          * if we would find a solution to transfer any size.
 500          * To support special commands like READ LONG.
 501          */
 502         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 503         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 504
 505         if (task->tf_flags & IDE_TFLAG_WRITE)
 506                 rq->cmd_flags |= REQ_RW;
 507
 508         rq->special = task;
 509         task->rq = rq;
 510
 511         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 512         blk_put_request(rq);
 513
 514         return error;
 515 }
 516
 517 EXPORT_SYMBOL(ide_raw_taskfile);
 518
 519 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 520 {
 521         task->data_phase = TASKFILE_NO_DATA;
 522
 523         return ide_raw_taskfile(drive, task, NULL, 0);
 524 }
 525 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 526
 527 #ifdef CONFIG_IDE_TASK_IOCTL
 528 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 529 {
 530         ide_task_request_t      *req_task;
 531         ide_task_t              args;
 532         u8 *outbuf              = NULL;
 533         u8 *inbuf               = NULL;
 534         u8 *data_buf            = NULL;
 535         int err                 = 0;
 536         int tasksize            = sizeof(struct ide_task_request_s);
 537         unsigned int taskin     = 0;
 538         unsigned int taskout    = 0;
 539         u16 nsect               = 0;
 540         char __user *buf = (char __user *)arg;
 541
 542 //      printk("IDE Taskfile ...\n");
 543
 544         req_task = kzalloc(tasksize, GFP_KERNEL);
 545         if (req_task == NULL) return -ENOMEM;
 546         if (copy_from_user(req_task, buf, tasksize)) {
 547                 kfree(req_task);
 548                 return -EFAULT;
 549         }
 550
 551         taskout = req_task->out_size;
 552         taskin  = req_task->in_size;
 553
 554         if (taskin > 65536 || taskout > 65536) {
 555                 err = -EINVAL;
 556                 goto abort;
 557         }
 558
 559         if (taskout) {
 560                 int outtotal = tasksize;
 561                 outbuf = kzalloc(taskout, GFP_KERNEL);
 562                 if (outbuf == NULL) {
 563                         err = -ENOMEM;
 564                         goto abort;
 565                 }
 566                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 567                         err = -EFAULT;
 568                         goto abort;
 569                 }
 570         }
 571
 572         if (taskin) {
 573                 int intotal = tasksize + taskout;
 574                 inbuf = kzalloc(taskin, GFP_KERNEL);
 575                 if (inbuf == NULL) {
 576                         err = -ENOMEM;
 577                         goto abort;
 578                 }
 579                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 580                         err = -EFAULT;
 581                         goto abort;
 582                 }
 583         }
 584
 585         memset(&args, 0, sizeof(ide_task_t));
 586
 587         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 588         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 589
 590         args.data_phase = req_task->data_phase;
 591
 592         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 593                         IDE_TFLAG_IN_TF;
 594         if (drive->dev_flags & IDE_DFLAG_LBA48)
 595                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 596
 597         if (req_task->out_flags.all) {
 598                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 599
 600                 if (req_task->out_flags.b.data)
 601                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 602
 603                 if (req_task->out_flags.b.nsector_hob)
 604                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 605                 if (req_task->out_flags.b.sector_hob)
 606                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 607                 if (req_task->out_flags.b.lcyl_hob)
 608                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 609                 if (req_task->out_flags.b.hcyl_hob)
 610                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 611
 612                 if (req_task->out_flags.b.error_feature)
 613                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 614                 if (req_task->out_flags.b.nsector)
 615                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 616                 if (req_task->out_flags.b.sector)
 617                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 618                 if (req_task->out_flags.b.lcyl)
 619                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 620                 if (req_task->out_flags.b.hcyl)
 621                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 622         } else {
 623                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 624                 if (args.tf_flags & IDE_TFLAG_LBA48)
 625                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 626         }
 627
 628         if (req_task->in_flags.b.data)
 629                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 630
 631         switch(req_task->data_phase) {
 632                 case TASKFILE_MULTI_OUT:
 633                         if (!drive->mult_count) {
 634                                 /* (hs): give up if multcount is not set */
 635                                 printk(KERN_ERR "%s: %s Multimode Write " \
 636                                         "multcount is not set\n",
 637                                         drive->name, __func__);
 638                                 err = -EPERM;
 639                                 goto abort;
 640                         }
 641                         /* fall through */
 642                 case TASKFILE_OUT:
 643                         /* fall through */
 644                 case TASKFILE_OUT_DMAQ:
 645                 case TASKFILE_OUT_DMA:
 646                         nsect = taskout / SECTOR_SIZE;
 647                         data_buf = outbuf;
 648                         break;
 649                 case TASKFILE_MULTI_IN:
 650                         if (!drive->mult_count) {
 651                                 /* (hs): give up if multcount is not set */
 652                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 653                                         "multcount is not set\n",
 654                                         drive->name, __func__);
 655                                 err = -EPERM;
 656                                 goto abort;
 657                         }
 658                         /* fall through */
 659                 case TASKFILE_IN:
 660                         /* fall through */
 661                 case TASKFILE_IN_DMAQ:
 662                 case TASKFILE_IN_DMA:
 663                         nsect = taskin / SECTOR_SIZE;
 664                         data_buf = inbuf;
 665                         break;
 666                 case TASKFILE_NO_DATA:
 667                         break;
 668                 default:
 669                         err = -EFAULT;
 670                         goto abort;
 671         }
 672
 673         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 674                 nsect = 0;
 675         else if (!nsect) {
 676                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 677
 678                 if (!nsect) {
 679                         printk(KERN_ERR "%s: in/out command without data\n",
 680                                         drive->name);
 681                         err = -EFAULT;
 682                         goto abort;
 683                 }
 684         }
 685
 686         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 687                 args.tf_flags |= IDE_TFLAG_WRITE;
 688
 689         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 690
 691         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 692         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 693
 694         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 695             req_task->in_flags.all == 0) {
 696                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 697                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 698                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 699         }
 700
 701         if (copy_to_user(buf, req_task, tasksize)) {
 702                 err = -EFAULT;
 703                 goto abort;
 704         }
 705         if (taskout) {
 706                 int outtotal = tasksize;
 707                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 708                         err = -EFAULT;
 709                         goto abort;
 710                 }
 711         }
 712         if (taskin) {
 713                 int intotal = tasksize + taskout;
 714                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 715                         err = -EFAULT;
 716                         goto abort;
 717                 }
 718         }
 719 abort:
 720         kfree(req_task);
 721         kfree(outbuf);
 722         kfree(inbuf);
 723
 724 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 725
 726         return err;
 727 }
 728 #endif