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         u8 saved_io_32bit = drive->io_32bit;
 269
 270         if (rq->bio)    /* fs request */
 271                 rq->errors = 0;
 272
 273         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 274                 ide_task_t *task = rq->special;
 275
 276                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 277                         drive->io_32bit = 0;
 278         }
 279
 280         touch_softlockup_watchdog();
 281
 282         switch (drive->hwif->data_phase) {
 283         case TASKFILE_MULTI_IN:
 284         case TASKFILE_MULTI_OUT:
 285                 ide_pio_multi(drive, rq, write);
 286                 break;
 287         default:
 288                 ide_pio_sector(drive, rq, write);
 289                 break;
 290         }
 291
 292         drive->io_32bit = saved_io_32bit;
 293 }
 294
 295 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 296                                   const char *s, u8 stat)
 297 {
 298         if (rq->bio) {
 299                 ide_hwif_t *hwif = drive->hwif;
 300                 int sectors = hwif->nsect - hwif->nleft;
 301
 302                 switch (hwif->data_phase) {
 303                 case TASKFILE_IN:
 304                         if (hwif->nleft)
 305                                 break;
 306                         /* fall through */
 307                 case TASKFILE_OUT:
 308                         sectors--;
 309                         break;
 310                 case TASKFILE_MULTI_IN:
 311                         if (hwif->nleft)
 312                                 break;
 313                         /* fall through */
 314                 case TASKFILE_MULTI_OUT:
 315                         sectors -= drive->mult_count;
 316                 default:
 317                         break;
 318                 }
 319
 320                 if (sectors > 0) {
 321                         struct ide_driver *drv;
 322
 323                         drv = *(struct ide_driver **)rq->rq_disk->private_data;
 324                         drv->end_request(drive, 1, sectors);
 325                 }
 326         }
 327         return ide_error(drive, s, stat);
 328 }
 329
 330 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 331 {
 332         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 333                 ide_task_t *task = rq->special;
 334                 u8 err = ide_read_error(drive);
 335
 336                 if (task)
 337                         ide_complete_task(drive, task, stat, err);
 338                 ide_complete_rq(drive, err);
 339                 return;
 340         }
 341
 342         if (rq->rq_disk) {
 343                 struct ide_driver *drv;
 344
 345                 drv = *(struct ide_driver **)rq->rq_disk->private_data;;
 346                 drv->end_request(drive, 1, rq->nr_sectors);
 347         } else
 348                 ide_end_request(drive, 1, rq->nr_sectors);
 349 }
 350
 351 /*
 352  * We got an interrupt on a task_in case, but no errors and no DRQ.
 353  *
 354  * It might be a spurious irq (shared irq), but it might be a
 355  * command that had no output.
 356  */
 357 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 358 {
 359         /* Command all done? */
 360         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 361                 task_end_request(drive, rq, stat);
 362                 return ide_stopped;
 363         }
 364
 365         /* Assume it was a spurious irq */
 366         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 367         return ide_started;
 368 }
 369
 370 /*
 371  * Handler for command with PIO data-in phase (Read/Read Multiple).
 372  */
 373 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 374 {
 375         ide_hwif_t *hwif = drive->hwif;
 376         struct request *rq = hwif->rq;
 377         u8 stat = hwif->tp_ops->read_status(hwif);
 378
 379         /* Error? */
 380         if (stat & ATA_ERR)
 381                 return task_error(drive, rq, __func__, stat);
 382
 383         /* Didn't want any data? Odd. */
 384         if ((stat & ATA_DRQ) == 0)
 385                 return task_in_unexpected(drive, rq, stat);
 386
 387         ide_pio_datablock(drive, rq, 0);
 388
 389         /* Are we done? Check status and finish transfer. */
 390         if (!hwif->nleft) {
 391                 stat = wait_drive_not_busy(drive);
 392                 if (!OK_STAT(stat, 0, BAD_STAT))
 393                         return task_error(drive, rq, __func__, stat);
 394                 task_end_request(drive, rq, stat);
 395                 return ide_stopped;
 396         }
 397
 398         /* Still data left to transfer. */
 399         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 400
 401         return ide_started;
 402 }
 403
 404 /*
 405  * Handler for command with PIO data-out phase (Write/Write Multiple).
 406  */
 407 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 408 {
 409         ide_hwif_t *hwif = drive->hwif;
 410         struct request *rq = hwif->rq;
 411         u8 stat = hwif->tp_ops->read_status(hwif);
 412
 413         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 414                 return task_error(drive, rq, __func__, stat);
 415
 416         /* Deal with unexpected ATA data phase. */
 417         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 418                 return task_error(drive, rq, __func__, stat);
 419
 420         if (!hwif->nleft) {
 421                 task_end_request(drive, rq, stat);
 422                 return ide_stopped;
 423         }
 424
 425         /* Still data left to transfer. */
 426         ide_pio_datablock(drive, rq, 1);
 427         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 428
 429         return ide_started;
 430 }
 431
 432 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 433 {
 434         ide_hwif_t *hwif = drive->hwif;
 435         ide_startstop_t startstop;
 436
 437         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 438                           drive->bad_wstat, WAIT_DRQ)) {
 439                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 440                         drive->name,
 441                         hwif->data_phase == TASKFILE_MULTI_OUT ? "MULT" : "",
 442                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 443                 return startstop;
 444         }
 445
 446         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 447                 local_irq_disable();
 448
 449         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 450         ide_pio_datablock(drive, rq, 1);
 451
 452         return ide_started;
 453 }
 454
 455 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 456 {
 457         struct request *rq;
 458         int error;
 459
 460         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 461         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 462         rq->buffer = buf;
 463
 464         /*
 465          * (ks) We transfer currently only whole sectors.
 466          * This is suffient for now.  But, it would be great,
 467          * if we would find a solution to transfer any size.
 468          * To support special commands like READ LONG.
 469          */
 470         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 471         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 472
 473         if (task->tf_flags & IDE_TFLAG_WRITE)
 474                 rq->cmd_flags |= REQ_RW;
 475
 476         rq->special = task;
 477         task->rq = rq;
 478
 479         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 480         blk_put_request(rq);
 481
 482         return error;
 483 }
 484
 485 EXPORT_SYMBOL(ide_raw_taskfile);
 486
 487 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 488 {
 489         task->data_phase = TASKFILE_NO_DATA;
 490
 491         return ide_raw_taskfile(drive, task, NULL, 0);
 492 }
 493 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 494
 495 #ifdef CONFIG_IDE_TASK_IOCTL
 496 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 497 {
 498         ide_task_request_t      *req_task;
 499         ide_task_t              args;
 500         u8 *outbuf              = NULL;
 501         u8 *inbuf               = NULL;
 502         u8 *data_buf            = NULL;
 503         int err                 = 0;
 504         int tasksize            = sizeof(struct ide_task_request_s);
 505         unsigned int taskin     = 0;
 506         unsigned int taskout    = 0;
 507         u16 nsect               = 0;
 508         char __user *buf = (char __user *)arg;
 509
 510 //      printk("IDE Taskfile ...\n");
 511
 512         req_task = kzalloc(tasksize, GFP_KERNEL);
 513         if (req_task == NULL) return -ENOMEM;
 514         if (copy_from_user(req_task, buf, tasksize)) {
 515                 kfree(req_task);
 516                 return -EFAULT;
 517         }
 518
 519         taskout = req_task->out_size;
 520         taskin  = req_task->in_size;
 521
 522         if (taskin > 65536 || taskout > 65536) {
 523                 err = -EINVAL;
 524                 goto abort;
 525         }
 526
 527         if (taskout) {
 528                 int outtotal = tasksize;
 529                 outbuf = kzalloc(taskout, GFP_KERNEL);
 530                 if (outbuf == NULL) {
 531                         err = -ENOMEM;
 532                         goto abort;
 533                 }
 534                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 535                         err = -EFAULT;
 536                         goto abort;
 537                 }
 538         }
 539
 540         if (taskin) {
 541                 int intotal = tasksize + taskout;
 542                 inbuf = kzalloc(taskin, GFP_KERNEL);
 543                 if (inbuf == NULL) {
 544                         err = -ENOMEM;
 545                         goto abort;
 546                 }
 547                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 548                         err = -EFAULT;
 549                         goto abort;
 550                 }
 551         }
 552
 553         memset(&args, 0, sizeof(ide_task_t));
 554
 555         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 556         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 557
 558         args.data_phase = req_task->data_phase;
 559
 560         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 561                         IDE_TFLAG_IN_TF;
 562         if (drive->dev_flags & IDE_DFLAG_LBA48)
 563                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 564
 565         if (req_task->out_flags.all) {
 566                 args.ftf_flags |= IDE_FTFLAG_FLAGGED;
 567
 568                 if (req_task->out_flags.b.data)
 569                         args.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 570
 571                 if (req_task->out_flags.b.nsector_hob)
 572                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 573                 if (req_task->out_flags.b.sector_hob)
 574                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 575                 if (req_task->out_flags.b.lcyl_hob)
 576                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 577                 if (req_task->out_flags.b.hcyl_hob)
 578                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 579
 580                 if (req_task->out_flags.b.error_feature)
 581                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 582                 if (req_task->out_flags.b.nsector)
 583                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 584                 if (req_task->out_flags.b.sector)
 585                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 586                 if (req_task->out_flags.b.lcyl)
 587                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 588                 if (req_task->out_flags.b.hcyl)
 589                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 590         } else {
 591                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 592                 if (args.tf_flags & IDE_TFLAG_LBA48)
 593                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 594         }
 595
 596         if (req_task->in_flags.b.data)
 597                 args.ftf_flags |= IDE_FTFLAG_IN_DATA;
 598
 599         switch(req_task->data_phase) {
 600                 case TASKFILE_MULTI_OUT:
 601                         if (!drive->mult_count) {
 602                                 /* (hs): give up if multcount is not set */
 603                                 printk(KERN_ERR "%s: %s Multimode Write " \
 604                                         "multcount is not set\n",
 605                                         drive->name, __func__);
 606                                 err = -EPERM;
 607                                 goto abort;
 608                         }
 609                         /* fall through */
 610                 case TASKFILE_OUT:
 611                         /* fall through */
 612                 case TASKFILE_OUT_DMAQ:
 613                 case TASKFILE_OUT_DMA:
 614                         nsect = taskout / SECTOR_SIZE;
 615                         data_buf = outbuf;
 616                         break;
 617                 case TASKFILE_MULTI_IN:
 618                         if (!drive->mult_count) {
 619                                 /* (hs): give up if multcount is not set */
 620                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 621                                         "multcount is not set\n",
 622                                         drive->name, __func__);
 623                                 err = -EPERM;
 624                                 goto abort;
 625                         }
 626                         /* fall through */
 627                 case TASKFILE_IN:
 628                         /* fall through */
 629                 case TASKFILE_IN_DMAQ:
 630                 case TASKFILE_IN_DMA:
 631                         nsect = taskin / SECTOR_SIZE;
 632                         data_buf = inbuf;
 633                         break;
 634                 case TASKFILE_NO_DATA:
 635                         break;
 636                 default:
 637                         err = -EFAULT;
 638                         goto abort;
 639         }
 640
 641         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 642                 nsect = 0;
 643         else if (!nsect) {
 644                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 645
 646                 if (!nsect) {
 647                         printk(KERN_ERR "%s: in/out command without data\n",
 648                                         drive->name);
 649                         err = -EFAULT;
 650                         goto abort;
 651                 }
 652         }
 653
 654         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 655                 args.tf_flags |= IDE_TFLAG_WRITE;
 656
 657         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 658
 659         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 660         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 661
 662         if ((args.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 663             req_task->in_flags.all == 0) {
 664                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 665                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 666                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 667         }
 668
 669         if (copy_to_user(buf, req_task, tasksize)) {
 670                 err = -EFAULT;
 671                 goto abort;
 672         }
 673         if (taskout) {
 674                 int outtotal = tasksize;
 675                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 676                         err = -EFAULT;
 677                         goto abort;
 678                 }
 679         }
 680         if (taskin) {
 681                 int intotal = tasksize + taskout;
 682                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 683                         err = -EFAULT;
 684                         goto abort;
 685                 }
 686         }
 687 abort:
 688         kfree(req_task);
 689         kfree(outbuf);
 690         kfree(inbuf);
 691
 692 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 693
 694         return err;
 695 }
 696 #endif