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                     dma_ops->dma_setup(drive))
 107                         return ide_stopped;
 108                 dma_ops->dma_exec_cmd(drive, tf->command);
 109                 dma_ops->dma_start(drive);
 110                 return ide_started;
 111         }
 112 }
 113 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 114
 115 /*
 116  * Handler for commands without a data phase
 117  */
 118 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 119 {
 120         ide_hwif_t *hwif = drive->hwif;
 121         ide_task_t *task = &hwif->task;
 122         struct ide_taskfile *tf = &task->tf;
 123         int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 124         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 125         u8 stat;
 126
 127         local_irq_enable_in_hardirq();
 128
 129         while (1) {
 130                 stat = hwif->tp_ops->read_status(hwif);
 131                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 132                         break;
 133                 udelay(10);
 134         };
 135
 136         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 137                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 138                         drive->mult_req = drive->mult_count = 0;
 139                         drive->special.b.recalibrate = 1;
 140                         (void)ide_dump_status(drive, __func__, stat);
 141                         return ide_stopped;
 142                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 143                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 144                                 ide_set_handler(drive, &task_no_data_intr,
 145                                                 WAIT_WORSTCASE, NULL);
 146                                 return ide_started;
 147                         }
 148                 }
 149                 return ide_error(drive, "task_no_data_intr", stat);
 150         }
 151
 152         if (custom && tf->command == ATA_CMD_IDLEIMMEDIATE) {
 153                 hwif->tp_ops->tf_read(drive, task);
 154                 if (tf->lbal != 0xc4) {
 155                         printk(KERN_ERR "%s: head unload failed!\n",
 156                                drive->name);
 157                         ide_tf_dump(drive->name, tf);
 158                 } else
 159                         drive->dev_flags |= IDE_DFLAG_PARKED;
 160         } else if (custom && tf->command == ATA_CMD_SET_MULTI)
 161                 drive->mult_count = drive->mult_req;
 162
 163         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE) {
 164                 struct request *rq = hwif->rq;
 165                 u8 err = ide_read_error(drive);
 166
 167                 if (blk_pm_request(rq))
 168                         ide_complete_pm_rq(drive, rq);
 169                 else {
 170                         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
 171                                 ide_complete_task(drive, task, stat, err);
 172                         ide_complete_rq(drive, err);
 173                 }
 174         }
 175
 176         return ide_stopped;
 177 }
 178
 179 static u8 wait_drive_not_busy(ide_drive_t *drive)
 180 {
 181         ide_hwif_t *hwif = drive->hwif;
 182         int retries;
 183         u8 stat;
 184
 185         /*
 186          * Last sector was transfered, wait until device is ready.  This can
 187          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 188          */
 189         for (retries = 0; retries < 1000; retries++) {
 190                 stat = hwif->tp_ops->read_status(hwif);
 191
 192                 if (stat & ATA_BUSY)
 193                         udelay(10);
 194                 else
 195                         break;
 196         }
 197
 198         if (stat & ATA_BUSY)
 199                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 200
 201         return stat;
 202 }
 203
 204 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 205                            unsigned int write)
 206 {
 207         ide_hwif_t *hwif = drive->hwif;
 208         struct scatterlist *sg = hwif->sg_table;
 209         struct scatterlist *cursg = hwif->cursg;
 210         struct page *page;
 211 #ifdef CONFIG_HIGHMEM
 212         unsigned long flags;
 213 #endif
 214         unsigned int offset;
 215         u8 *buf;
 216
 217         cursg = hwif->cursg;
 218         if (!cursg) {
 219                 cursg = sg;
 220                 hwif->cursg = sg;
 221         }
 222
 223         page = sg_page(cursg);
 224         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 225
 226         /* get the current page and offset */
 227         page = nth_page(page, (offset >> PAGE_SHIFT));
 228         offset %= PAGE_SIZE;
 229
 230 #ifdef CONFIG_HIGHMEM
 231         local_irq_save(flags);
 232 #endif
 233         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 234
 235         hwif->nleft--;
 236         hwif->cursg_ofs++;
 237
 238         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 239                 hwif->cursg = sg_next(hwif->cursg);
 240                 hwif->cursg_ofs = 0;
 241         }
 242
 243         /* do the actual data transfer */
 244         if (write)
 245                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 246         else
 247                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 248
 249         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 250 #ifdef CONFIG_HIGHMEM
 251         local_irq_restore(flags);
 252 #endif
 253 }
 254
 255 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 256                           unsigned int write)
 257 {
 258         unsigned int nsect;
 259
 260         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 261         while (nsect--)
 262                 ide_pio_sector(drive, rq, write);
 263 }
 264
 265 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 266                                      unsigned int write)
 267 {
 268         ide_task_t *task = &drive->hwif->task;
 269         u8 saved_io_32bit = drive->io_32bit;
 270
 271         if (rq->bio)    /* fs request */
 272                 rq->errors = 0;
 273
 274         if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 275                 drive->io_32bit = 0;
 276
 277         touch_softlockup_watchdog();
 278
 279         switch (task->data_phase) {
 280         case TASKFILE_MULTI_IN:
 281         case TASKFILE_MULTI_OUT:
 282                 ide_pio_multi(drive, rq, write);
 283                 break;
 284         default:
 285                 ide_pio_sector(drive, rq, write);
 286                 break;
 287         }
 288
 289         drive->io_32bit = saved_io_32bit;
 290 }
 291
 292 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 293                                   const char *s, u8 stat)
 294 {
 295         if (rq->bio) {
 296                 ide_hwif_t *hwif = drive->hwif;
 297                 ide_task_t *task = &hwif->task;
 298                 int sectors = hwif->nsect - hwif->nleft;
 299
 300                 switch (task->data_phase) {
 301                 case TASKFILE_IN:
 302                         if (hwif->nleft)
 303                                 break;
 304                         /* fall through */
 305                 case TASKFILE_OUT:
 306                         sectors--;
 307                         break;
 308                 case TASKFILE_MULTI_IN:
 309                         if (hwif->nleft)
 310                                 break;
 311                         /* fall through */
 312                 case TASKFILE_MULTI_OUT:
 313                         sectors -= drive->mult_count;
 314                 default:
 315                         break;
 316                 }
 317
 318                 if (sectors > 0) {
 319                         struct ide_driver *drv;
 320
 321                         drv = *(struct ide_driver **)rq->rq_disk->private_data;
 322                         drv->end_request(drive, 1, sectors);
 323                 }
 324         }
 325         return ide_error(drive, s, stat);
 326 }
 327
 328 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 329 {
 330         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 331                 ide_task_t *task = rq->special;
 332                 u8 err = ide_read_error(drive);
 333
 334                 if (task)
 335                         ide_complete_task(drive, task, stat, err);
 336                 ide_complete_rq(drive, err);
 337                 return;
 338         }
 339
 340         if (rq->rq_disk) {
 341                 struct ide_driver *drv;
 342
 343                 drv = *(struct ide_driver **)rq->rq_disk->private_data;;
 344                 drv->end_request(drive, 1, rq->nr_sectors);
 345         } else
 346                 ide_end_request(drive, 1, rq->nr_sectors);
 347 }
 348
 349 /*
 350  * We got an interrupt on a task_in case, but no errors and no DRQ.
 351  *
 352  * It might be a spurious irq (shared irq), but it might be a
 353  * command that had no output.
 354  */
 355 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 356 {
 357         /* Command all done? */
 358         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 359                 task_end_request(drive, rq, stat);
 360                 return ide_stopped;
 361         }
 362
 363         /* Assume it was a spurious irq */
 364         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 365         return ide_started;
 366 }
 367
 368 /*
 369  * Handler for command with PIO data-in phase (Read/Read Multiple).
 370  */
 371 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 372 {
 373         ide_hwif_t *hwif = drive->hwif;
 374         struct request *rq = hwif->rq;
 375         u8 stat = hwif->tp_ops->read_status(hwif);
 376
 377         /* Error? */
 378         if (stat & ATA_ERR)
 379                 return task_error(drive, rq, __func__, stat);
 380
 381         /* Didn't want any data? Odd. */
 382         if ((stat & ATA_DRQ) == 0)
 383                 return task_in_unexpected(drive, rq, stat);
 384
 385         ide_pio_datablock(drive, rq, 0);
 386
 387         /* Are we done? Check status and finish transfer. */
 388         if (!hwif->nleft) {
 389                 stat = wait_drive_not_busy(drive);
 390                 if (!OK_STAT(stat, 0, BAD_STAT))
 391                         return task_error(drive, rq, __func__, stat);
 392                 task_end_request(drive, rq, stat);
 393                 return ide_stopped;
 394         }
 395
 396         /* Still data left to transfer. */
 397         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 398
 399         return ide_started;
 400 }
 401
 402 /*
 403  * Handler for command with PIO data-out phase (Write/Write Multiple).
 404  */
 405 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 406 {
 407         ide_hwif_t *hwif = drive->hwif;
 408         struct request *rq = hwif->rq;
 409         u8 stat = hwif->tp_ops->read_status(hwif);
 410
 411         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 412                 return task_error(drive, rq, __func__, stat);
 413
 414         /* Deal with unexpected ATA data phase. */
 415         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 416                 return task_error(drive, rq, __func__, stat);
 417
 418         if (!hwif->nleft) {
 419                 task_end_request(drive, rq, stat);
 420                 return ide_stopped;
 421         }
 422
 423         /* Still data left to transfer. */
 424         ide_pio_datablock(drive, rq, 1);
 425         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 426
 427         return ide_started;
 428 }
 429
 430 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 431 {
 432         ide_task_t *task = &drive->hwif->task;
 433         ide_startstop_t startstop;
 434
 435         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 436                           drive->bad_wstat, WAIT_DRQ)) {
 437                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 438                         drive->name,
 439                         task->data_phase == TASKFILE_MULTI_OUT ? "MULT" : "",
 440                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 441                 return startstop;
 442         }
 443
 444         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 445                 local_irq_disable();
 446
 447         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 448         ide_pio_datablock(drive, rq, 1);
 449
 450         return ide_started;
 451 }
 452
 453 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 454 {
 455         struct request *rq;
 456         int error;
 457
 458         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 459         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 460         rq->buffer = buf;
 461
 462         /*
 463          * (ks) We transfer currently only whole sectors.
 464          * This is suffient for now.  But, it would be great,
 465          * if we would find a solution to transfer any size.
 466          * To support special commands like READ LONG.
 467          */
 468         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 469         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 470
 471         if (task->tf_flags & IDE_TFLAG_WRITE)
 472                 rq->cmd_flags |= REQ_RW;
 473
 474         rq->special = task;
 475         task->rq = rq;
 476
 477         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 478         blk_put_request(rq);
 479
 480         return error;
 481 }
 482
 483 EXPORT_SYMBOL(ide_raw_taskfile);
 484
 485 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 486 {
 487         task->data_phase = TASKFILE_NO_DATA;
 488
 489         return ide_raw_taskfile(drive, task, NULL, 0);
 490 }
 491 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 492
 493 #ifdef CONFIG_IDE_TASK_IOCTL
 494 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 495 {
 496         ide_task_request_t      *req_task;
 497         ide_task_t              args;
 498         u8 *outbuf              = NULL;
 499         u8 *inbuf               = NULL;
 500         u8 *data_buf            = NULL;
 501         int err                 = 0;
 502         int tasksize            = sizeof(struct ide_task_request_s);
 503         unsigned int taskin     = 0;
 504         unsigned int taskout    = 0;
 505         u16 nsect               = 0;
 506         char __user *buf = (char __user *)arg;
 507
 508 //      printk("IDE Taskfile ...\n");
 509
 510         req_task = kzalloc(tasksize, GFP_KERNEL);
 511         if (req_task == NULL) return -ENOMEM;
 512         if (copy_from_user(req_task, buf, tasksize)) {
 513                 kfree(req_task);
 514                 return -EFAULT;
 515         }
 516
 517         taskout = req_task->out_size;
 518         taskin  = req_task->in_size;
 519
 520         if (taskin > 65536 || taskout > 65536) {
 521                 err = -EINVAL;
 522                 goto abort;
 523         }
 524
 525         if (taskout) {
 526                 int outtotal = tasksize;
 527                 outbuf = kzalloc(taskout, GFP_KERNEL);
 528                 if (outbuf == NULL) {
 529                         err = -ENOMEM;
 530                         goto abort;
 531                 }
 532                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 533                         err = -EFAULT;
 534                         goto abort;
 535                 }
 536         }
 537
 538         if (taskin) {
 539                 int intotal = tasksize + taskout;
 540                 inbuf = kzalloc(taskin, GFP_KERNEL);
 541                 if (inbuf == NULL) {
 542                         err = -ENOMEM;
 543                         goto abort;
 544                 }
 545                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 546                         err = -EFAULT;
 547                         goto abort;
 548                 }
 549         }
 550
 551         memset(&args, 0, sizeof(ide_task_t));
 552
 553         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 554         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 555
 556         args.data_phase = req_task->data_phase;
 557
 558         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 559                         IDE_TFLAG_IN_TF;
 560         if (drive->dev_flags & IDE_DFLAG_LBA48)
 561                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 562
 563         if (req_task->out_flags.all) {
 564                 args.ftf_flags |= IDE_FTFLAG_FLAGGED;
 565
 566                 if (req_task->out_flags.b.data)
 567                         args.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 568
 569                 if (req_task->out_flags.b.nsector_hob)
 570                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 571                 if (req_task->out_flags.b.sector_hob)
 572                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 573                 if (req_task->out_flags.b.lcyl_hob)
 574                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 575                 if (req_task->out_flags.b.hcyl_hob)
 576                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 577
 578                 if (req_task->out_flags.b.error_feature)
 579                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 580                 if (req_task->out_flags.b.nsector)
 581                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 582                 if (req_task->out_flags.b.sector)
 583                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 584                 if (req_task->out_flags.b.lcyl)
 585                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 586                 if (req_task->out_flags.b.hcyl)
 587                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 588         } else {
 589                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 590                 if (args.tf_flags & IDE_TFLAG_LBA48)
 591                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 592         }
 593
 594         if (req_task->in_flags.b.data)
 595                 args.ftf_flags |= IDE_FTFLAG_IN_DATA;
 596
 597         switch(req_task->data_phase) {
 598                 case TASKFILE_MULTI_OUT:
 599                         if (!drive->mult_count) {
 600                                 /* (hs): give up if multcount is not set */
 601                                 printk(KERN_ERR "%s: %s Multimode Write " \
 602                                         "multcount is not set\n",
 603                                         drive->name, __func__);
 604                                 err = -EPERM;
 605                                 goto abort;
 606                         }
 607                         /* fall through */
 608                 case TASKFILE_OUT:
 609                         /* fall through */
 610                 case TASKFILE_OUT_DMAQ:
 611                 case TASKFILE_OUT_DMA:
 612                         nsect = taskout / SECTOR_SIZE;
 613                         data_buf = outbuf;
 614                         break;
 615                 case TASKFILE_MULTI_IN:
 616                         if (!drive->mult_count) {
 617                                 /* (hs): give up if multcount is not set */
 618                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 619                                         "multcount is not set\n",
 620                                         drive->name, __func__);
 621                                 err = -EPERM;
 622                                 goto abort;
 623                         }
 624                         /* fall through */
 625                 case TASKFILE_IN:
 626                         /* fall through */
 627                 case TASKFILE_IN_DMAQ:
 628                 case TASKFILE_IN_DMA:
 629                         nsect = taskin / SECTOR_SIZE;
 630                         data_buf = inbuf;
 631                         break;
 632                 case TASKFILE_NO_DATA:
 633                         break;
 634                 default:
 635                         err = -EFAULT;
 636                         goto abort;
 637         }
 638
 639         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 640                 nsect = 0;
 641         else if (!nsect) {
 642                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 643
 644                 if (!nsect) {
 645                         printk(KERN_ERR "%s: in/out command without data\n",
 646                                         drive->name);
 647                         err = -EFAULT;
 648                         goto abort;
 649                 }
 650         }
 651
 652         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 653                 args.tf_flags |= IDE_TFLAG_WRITE;
 654
 655         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 656
 657         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 658         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 659
 660         if ((args.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 661             req_task->in_flags.all == 0) {
 662                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 663                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 664                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 665         }
 666
 667         if (copy_to_user(buf, req_task, tasksize)) {
 668                 err = -EFAULT;
 669                 goto abort;
 670         }
 671         if (taskout) {
 672                 int outtotal = tasksize;
 673                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 674                         err = -EFAULT;
 675                         goto abort;
 676                 }
 677         }
 678         if (taskin) {
 679                 int intotal = tasksize + taskout;
 680                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 681                         err = -EFAULT;
 682                         goto abort;
 683                 }
 684         }
 685 abort:
 686         kfree(req_task);
 687         kfree(outbuf);
 688         kfree(inbuf);
 689
 690 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 691
 692         return err;
 693 }
 694 #endif