git.oblomov.eu Git - linux-2.6/blob - 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 pre_task_out_intr(ide_drive_t *, struct request *);
  57 static ide_startstop_t task_in_intr(ide_drive_t *);
  58
  59 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
  60 {
  61         ide_hwif_t *hwif = drive->hwif;
  62         struct ide_taskfile *tf = &task->tf;
  63         ide_handler_t *handler = NULL;
  64         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  65         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  66
  67         if (task->data_phase == TASKFILE_MULTI_IN ||
  68             task->data_phase == TASKFILE_MULTI_OUT) {
  69                 if (!drive->mult_count) {
  70                         printk(KERN_ERR "%s: multimode not set!\n",
  71                                         drive->name);
  72                         return ide_stopped;
  73                 }
  74         }
  75
  76         if (task->ftf_flags & IDE_FTFLAG_FLAGGED)
  77                 task->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  78
  79         memcpy(&hwif->task, task, sizeof(*task));
  80
  81         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  82                 ide_tf_dump(drive->name, tf);
  83                 tp_ops->set_irq(hwif, 1);
  84                 SELECT_MASK(drive, 0);
  85                 tp_ops->tf_load(drive, task);
  86         }
  87
  88         switch (task->data_phase) {
  89         case TASKFILE_MULTI_OUT:
  90         case TASKFILE_OUT:
  91                 tp_ops->exec_command(hwif, tf->command);
  92                 ndelay(400);    /* FIXME */
  93                 return pre_task_out_intr(drive, task->rq);
  94         case TASKFILE_MULTI_IN:
  95         case TASKFILE_IN:
  96                 handler = task_in_intr;
  97                 /* fall-through */
  98         case TASKFILE_NO_DATA:
  99                 if (handler == NULL)
 100                         handler = task_no_data_intr;
 101                 ide_execute_command(drive, tf->command, handler,
 102                                     WAIT_WORSTCASE, NULL);
 103                 return ide_started;
 104         default:
 105                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 106                     ide_build_sglist(drive, hwif->rq) == 0 ||
 107                     dma_ops->dma_setup(drive))
 108                         return ide_stopped;
 109                 dma_ops->dma_exec_cmd(drive, tf->command);
 110                 dma_ops->dma_start(drive);
 111                 return ide_started;
 112         }
 113 }
 114 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 115
 116 /*
 117  * Handler for commands without a data phase
 118  */
 119 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 120 {
 121         ide_hwif_t *hwif = drive->hwif;
 122         ide_task_t *task = &hwif->task;
 123         struct ide_taskfile *tf = &task->tf;
 124         int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 125         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 126         u8 stat;
 127
 128         local_irq_enable_in_hardirq();
 129
 130         while (1) {
 131                 stat = hwif->tp_ops->read_status(hwif);
 132                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 133                         break;
 134                 udelay(10);
 135         };
 136
 137         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 138                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 139                         drive->mult_req = drive->mult_count = 0;
 140                         drive->special.b.recalibrate = 1;
 141                         (void)ide_dump_status(drive, __func__, stat);
 142                         return ide_stopped;
 143                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 144                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 145                                 ide_set_handler(drive, &task_no_data_intr,
 146                                                 WAIT_WORSTCASE, NULL);
 147                                 return ide_started;
 148                         }
 149                 }
 150                 return ide_error(drive, "task_no_data_intr", stat);
 151         }
 152
 153         if (custom && tf->command == ATA_CMD_IDLEIMMEDIATE) {
 154                 hwif->tp_ops->tf_read(drive, task);
 155                 if (tf->lbal != 0xc4) {
 156                         printk(KERN_ERR "%s: head unload failed!\n",
 157                                drive->name);
 158                         ide_tf_dump(drive->name, tf);
 159                 } else
 160                         drive->dev_flags |= IDE_DFLAG_PARKED;
 161         } else if (custom && tf->command == ATA_CMD_SET_MULTI)
 162                 drive->mult_count = drive->mult_req;
 163
 164         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE) {
 165                 struct request *rq = hwif->rq;
 166                 u8 err = ide_read_error(drive);
 167
 168                 if (blk_pm_request(rq))
 169                         ide_complete_pm_rq(drive, rq);
 170                 else {
 171                         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
 172                                 ide_complete_task(drive, task, stat, err);
 173                         ide_complete_rq(drive, err);
 174                 }
 175         }
 176
 177         return ide_stopped;
 178 }
 179
 180 static u8 wait_drive_not_busy(ide_drive_t *drive)
 181 {
 182         ide_hwif_t *hwif = drive->hwif;
 183         int retries;
 184         u8 stat;
 185
 186         /*
 187          * Last sector was transfered, wait until device is ready.  This can
 188          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 189          */
 190         for (retries = 0; retries < 1000; retries++) {
 191                 stat = hwif->tp_ops->read_status(hwif);
 192
 193                 if (stat & ATA_BUSY)
 194                         udelay(10);
 195                 else
 196                         break;
 197         }
 198
 199         if (stat & ATA_BUSY)
 200                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 201
 202         return stat;
 203 }
 204
 205 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 206                            unsigned int write)
 207 {
 208         ide_hwif_t *hwif = drive->hwif;
 209         struct scatterlist *sg = hwif->sg_table;
 210         struct scatterlist *cursg = hwif->cursg;
 211         struct page *page;
 212 #ifdef CONFIG_HIGHMEM
 213         unsigned long flags;
 214 #endif
 215         unsigned int offset;
 216         u8 *buf;
 217
 218         cursg = hwif->cursg;
 219         if (!cursg) {
 220                 cursg = sg;
 221                 hwif->cursg = sg;
 222         }
 223
 224         page = sg_page(cursg);
 225         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 226
 227         /* get the current page and offset */
 228         page = nth_page(page, (offset >> PAGE_SHIFT));
 229         offset %= PAGE_SIZE;
 230
 231 #ifdef CONFIG_HIGHMEM
 232         local_irq_save(flags);
 233 #endif
 234         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 235
 236         hwif->nleft--;
 237         hwif->cursg_ofs++;
 238
 239         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 240                 hwif->cursg = sg_next(hwif->cursg);
 241                 hwif->cursg_ofs = 0;
 242         }
 243
 244         /* do the actual data transfer */
 245         if (write)
 246                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 247         else
 248                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 249
 250         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 251 #ifdef CONFIG_HIGHMEM
 252         local_irq_restore(flags);
 253 #endif
 254 }
 255
 256 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 257                           unsigned int write)
 258 {
 259         unsigned int nsect;
 260
 261         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 262         while (nsect--)
 263                 ide_pio_sector(drive, rq, write);
 264 }
 265
 266 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 267                                      unsigned int write)
 268 {
 269         ide_task_t *task = &drive->hwif->task;
 270         u8 saved_io_32bit = drive->io_32bit;
 271
 272         if (blk_fs_request(rq))
 273                 rq->errors = 0;
 274
 275         if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 276                 drive->io_32bit = 0;
 277
 278         touch_softlockup_watchdog();
 279
 280         switch (task->data_phase) {
 281         case TASKFILE_MULTI_IN:
 282         case TASKFILE_MULTI_OUT:
 283                 ide_pio_multi(drive, rq, write);
 284                 break;
 285         default:
 286                 ide_pio_sector(drive, rq, write);
 287                 break;
 288         }
 289
 290         drive->io_32bit = saved_io_32bit;
 291 }
 292
 293 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 294                                   const char *s, u8 stat)
 295 {
 296         if (blk_fs_request(rq)) {
 297                 ide_hwif_t *hwif = drive->hwif;
 298                 ide_task_t *task = &hwif->task;
 299                 int sectors = hwif->nsect - hwif->nleft;
 300
 301                 switch (task->data_phase) {
 302                 case TASKFILE_IN:
 303                         if (hwif->nleft)
 304                                 break;
 305                         /* fall through */
 306                 case TASKFILE_OUT:
 307                         sectors--;
 308                         break;
 309                 case TASKFILE_MULTI_IN:
 310                         if (hwif->nleft)
 311                                 break;
 312                         /* fall through */
 313                 case TASKFILE_MULTI_OUT:
 314                         sectors -= drive->mult_count;
 315                 default:
 316                         break;
 317                 }
 318
 319                 if (sectors > 0)
 320                         ide_end_request(drive, 1, sectors);
 321         }
 322         return ide_error(drive, s, stat);
 323 }
 324
 325 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 326 {
 327         if (blk_fs_request(rq) == 0) {
 328                 ide_task_t *task = rq->special;
 329                 u8 err = ide_read_error(drive);
 330
 331                 if (task)
 332                         ide_complete_task(drive, task, stat, err);
 333                 ide_complete_rq(drive, err);
 334                 return;
 335         }
 336
 337         ide_end_request(drive, 1, rq->nr_sectors);
 338 }
 339
 340 /*
 341  * We got an interrupt on a task_in case, but no errors and no DRQ.
 342  *
 343  * It might be a spurious irq (shared irq), but it might be a
 344  * command that had no output.
 345  */
 346 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 347 {
 348         /* Command all done? */
 349         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 350                 task_end_request(drive, rq, stat);
 351                 return ide_stopped;
 352         }
 353
 354         /* Assume it was a spurious irq */
 355         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 356         return ide_started;
 357 }
 358
 359 /*
 360  * Handler for command with PIO data-in phase (Read/Read Multiple).
 361  */
 362 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 363 {
 364         ide_hwif_t *hwif = drive->hwif;
 365         struct request *rq = hwif->rq;
 366         u8 stat = hwif->tp_ops->read_status(hwif);
 367
 368         /* Error? */
 369         if (stat & ATA_ERR)
 370                 return task_error(drive, rq, __func__, stat);
 371
 372         /* Didn't want any data? Odd. */
 373         if ((stat & ATA_DRQ) == 0)
 374                 return task_in_unexpected(drive, rq, stat);
 375
 376         ide_pio_datablock(drive, rq, 0);
 377
 378         /* Are we done? Check status and finish transfer. */
 379         if (!hwif->nleft) {
 380                 stat = wait_drive_not_busy(drive);
 381                 if (!OK_STAT(stat, 0, BAD_STAT))
 382                         return task_error(drive, rq, __func__, stat);
 383                 task_end_request(drive, rq, stat);
 384                 return ide_stopped;
 385         }
 386
 387         /* Still data left to transfer. */
 388         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 389
 390         return ide_started;
 391 }
 392
 393 /*
 394  * Handler for command with PIO data-out phase (Write/Write Multiple).
 395  */
 396 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 397 {
 398         ide_hwif_t *hwif = drive->hwif;
 399         struct request *rq = hwif->rq;
 400         u8 stat = hwif->tp_ops->read_status(hwif);
 401
 402         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 403                 return task_error(drive, rq, __func__, stat);
 404
 405         /* Deal with unexpected ATA data phase. */
 406         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 407                 return task_error(drive, rq, __func__, stat);
 408
 409         if (!hwif->nleft) {
 410                 task_end_request(drive, rq, stat);
 411                 return ide_stopped;
 412         }
 413
 414         /* Still data left to transfer. */
 415         ide_pio_datablock(drive, rq, 1);
 416         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 417
 418         return ide_started;
 419 }
 420
 421 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 422 {
 423         ide_task_t *task = &drive->hwif->task;
 424         ide_startstop_t startstop;
 425
 426         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 427                           drive->bad_wstat, WAIT_DRQ)) {
 428                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 429                         drive->name,
 430                         task->data_phase == TASKFILE_MULTI_OUT ? "MULT" : "",
 431                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 432                 return startstop;
 433         }
 434
 435         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 436                 local_irq_disable();
 437
 438         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 439         ide_pio_datablock(drive, rq, 1);
 440
 441         return ide_started;
 442 }
 443
 444 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 445 {
 446         struct request *rq;
 447         int error;
 448
 449         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 450         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 451         rq->buffer = buf;
 452
 453         /*
 454          * (ks) We transfer currently only whole sectors.
 455          * This is suffient for now.  But, it would be great,
 456          * if we would find a solution to transfer any size.
 457          * To support special commands like READ LONG.
 458          */
 459         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 460         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 461
 462         if (task->tf_flags & IDE_TFLAG_WRITE)
 463                 rq->cmd_flags |= REQ_RW;
 464
 465         rq->special = task;
 466         task->rq = rq;
 467
 468         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 469         blk_put_request(rq);
 470
 471         return error;
 472 }
 473
 474 EXPORT_SYMBOL(ide_raw_taskfile);
 475
 476 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 477 {
 478         task->data_phase = TASKFILE_NO_DATA;
 479
 480         return ide_raw_taskfile(drive, task, NULL, 0);
 481 }
 482 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 483
 484 #ifdef CONFIG_IDE_TASK_IOCTL
 485 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 486 {
 487         ide_task_request_t      *req_task;
 488         ide_task_t              args;
 489         u8 *outbuf              = NULL;
 490         u8 *inbuf               = NULL;
 491         u8 *data_buf            = NULL;
 492         int err                 = 0;
 493         int tasksize            = sizeof(struct ide_task_request_s);
 494         unsigned int taskin     = 0;
 495         unsigned int taskout    = 0;
 496         u16 nsect               = 0;
 497         char __user *buf = (char __user *)arg;
 498
 499 //      printk("IDE Taskfile ...\n");
 500
 501         req_task = kzalloc(tasksize, GFP_KERNEL);
 502         if (req_task == NULL) return -ENOMEM;
 503         if (copy_from_user(req_task, buf, tasksize)) {
 504                 kfree(req_task);
 505                 return -EFAULT;
 506         }
 507
 508         taskout = req_task->out_size;
 509         taskin  = req_task->in_size;
 510
 511         if (taskin > 65536 || taskout > 65536) {
 512                 err = -EINVAL;
 513                 goto abort;
 514         }
 515
 516         if (taskout) {
 517                 int outtotal = tasksize;
 518                 outbuf = kzalloc(taskout, GFP_KERNEL);
 519                 if (outbuf == NULL) {
 520                         err = -ENOMEM;
 521                         goto abort;
 522                 }
 523                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 524                         err = -EFAULT;
 525                         goto abort;
 526                 }
 527         }
 528
 529         if (taskin) {
 530                 int intotal = tasksize + taskout;
 531                 inbuf = kzalloc(taskin, GFP_KERNEL);
 532                 if (inbuf == NULL) {
 533                         err = -ENOMEM;
 534                         goto abort;
 535                 }
 536                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 537                         err = -EFAULT;
 538                         goto abort;
 539                 }
 540         }
 541
 542         memset(&args, 0, sizeof(ide_task_t));
 543
 544         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 545         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 546
 547         args.data_phase = req_task->data_phase;
 548
 549         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 550                         IDE_TFLAG_IN_TF;
 551         if (drive->dev_flags & IDE_DFLAG_LBA48)
 552                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 553
 554         if (req_task->out_flags.all) {
 555                 args.ftf_flags |= IDE_FTFLAG_FLAGGED;
 556
 557                 if (req_task->out_flags.b.data)
 558                         args.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 559
 560                 if (req_task->out_flags.b.nsector_hob)
 561                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 562                 if (req_task->out_flags.b.sector_hob)
 563                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 564                 if (req_task->out_flags.b.lcyl_hob)
 565                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 566                 if (req_task->out_flags.b.hcyl_hob)
 567                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 568
 569                 if (req_task->out_flags.b.error_feature)
 570                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 571                 if (req_task->out_flags.b.nsector)
 572                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 573                 if (req_task->out_flags.b.sector)
 574                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 575                 if (req_task->out_flags.b.lcyl)
 576                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 577                 if (req_task->out_flags.b.hcyl)
 578                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 579         } else {
 580                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 581                 if (args.tf_flags & IDE_TFLAG_LBA48)
 582                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 583         }
 584
 585         if (req_task->in_flags.b.data)
 586                 args.ftf_flags |= IDE_FTFLAG_IN_DATA;
 587
 588         switch(req_task->data_phase) {
 589                 case TASKFILE_MULTI_OUT:
 590                         if (!drive->mult_count) {
 591                                 /* (hs): give up if multcount is not set */
 592                                 printk(KERN_ERR "%s: %s Multimode Write " \
 593                                         "multcount is not set\n",
 594                                         drive->name, __func__);
 595                                 err = -EPERM;
 596                                 goto abort;
 597                         }
 598                         /* fall through */
 599                 case TASKFILE_OUT:
 600                         /* fall through */
 601                 case TASKFILE_OUT_DMAQ:
 602                 case TASKFILE_OUT_DMA:
 603                         nsect = taskout / SECTOR_SIZE;
 604                         data_buf = outbuf;
 605                         break;
 606                 case TASKFILE_MULTI_IN:
 607                         if (!drive->mult_count) {
 608                                 /* (hs): give up if multcount is not set */
 609                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 610                                         "multcount is not set\n",
 611                                         drive->name, __func__);
 612                                 err = -EPERM;
 613                                 goto abort;
 614                         }
 615                         /* fall through */
 616                 case TASKFILE_IN:
 617                         /* fall through */
 618                 case TASKFILE_IN_DMAQ:
 619                 case TASKFILE_IN_DMA:
 620                         nsect = taskin / SECTOR_SIZE;
 621                         data_buf = inbuf;
 622                         break;
 623                 case TASKFILE_NO_DATA:
 624                         break;
 625                 default:
 626                         err = -EFAULT;
 627                         goto abort;
 628         }
 629
 630         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 631                 nsect = 0;
 632         else if (!nsect) {
 633                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 634
 635                 if (!nsect) {
 636                         printk(KERN_ERR "%s: in/out command without data\n",
 637                                         drive->name);
 638                         err = -EFAULT;
 639                         goto abort;
 640                 }
 641         }
 642
 643         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 644                 args.tf_flags |= IDE_TFLAG_WRITE;
 645
 646         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 647
 648         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 649         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 650
 651         if ((args.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 652             req_task->in_flags.all == 0) {
 653                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 654                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 655                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 656         }
 657
 658         if (copy_to_user(buf, req_task, tasksize)) {
 659                 err = -EFAULT;
 660                 goto abort;
 661         }
 662         if (taskout) {
 663                 int outtotal = tasksize;
 664                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 665                         err = -EFAULT;
 666                         goto abort;
 667                 }
 668         }
 669         if (taskin) {
 670                 int intotal = tasksize + taskout;
 671                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 672                         err = -EFAULT;
 673                         goto abort;
 674                 }
 675         }
 676 abort:
 677         kfree(req_task);
 678         kfree(outbuf);
 679         kfree(inbuf);
 680
 681 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 682
 683         return err;
 684 }
 685 #endif