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         struct ide_cmd cmd;
  43
  44         memset(&cmd, 0, sizeof(cmd));
  45         cmd.tf.nsect = 0x01;
  46         if (drive->media == ide_disk)
  47                 cmd.tf.command = ATA_CMD_ID_ATA;
  48         else
  49                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  50         cmd.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
  51         cmd.protocol = ATA_PROT_PIO;
  52
  53         return ide_raw_taskfile(drive, &cmd, buf, 1);
  54 }
  55
  56 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  57 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  58 static ide_startstop_t task_pio_intr(ide_drive_t *);
  59
  60 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  61 {
  62         ide_hwif_t *hwif = drive->hwif;
  63         struct ide_cmd *cmd = &hwif->cmd;
  64         struct ide_taskfile *tf = &cmd->tf;
  65         ide_handler_t *handler = NULL;
  66         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  67         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  68
  69         if (orig_cmd->protocol == ATA_PROT_PIO &&
  70             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  71             drive->mult_count == 0) {
  72                 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
  73                 return ide_stopped;
  74         }
  75
  76         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  77                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  78
  79         memcpy(cmd, orig_cmd, sizeof(*cmd));
  80
  81         if ((cmd->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, cmd);
  86         }
  87
  88         switch (cmd->protocol) {
  89         case ATA_PROT_PIO:
  90                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
  91                         tp_ops->exec_command(hwif, tf->command);
  92                         ndelay(400);    /* FIXME */
  93                         return pre_task_out_intr(drive, cmd);
  94                 }
  95                 handler = task_pio_intr;
  96                 /* fall-through */
  97         case ATA_PROT_NODATA:
  98                 if (handler == NULL)
  99                         handler = task_no_data_intr;
 100                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 101                 return ide_started;
 102         case ATA_PROT_DMA:
 103                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 104                     ide_build_sglist(drive, cmd) == 0 ||
 105                     dma_ops->dma_setup(drive, cmd))
 106                         return ide_stopped;
 107                 hwif->expiry = dma_ops->dma_timer_expiry;
 108                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 109                 dma_ops->dma_start(drive);
 110         default:
 111                 return ide_started;
 112         }
 113 }
 114 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 115
 116 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 117 {
 118         ide_hwif_t *hwif = drive->hwif;
 119         struct ide_cmd *cmd = &hwif->cmd;
 120         struct ide_taskfile *tf = &cmd->tf;
 121         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 122         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 123         u8 stat;
 124
 125         local_irq_enable_in_hardirq();
 126
 127         while (1) {
 128                 stat = hwif->tp_ops->read_status(hwif);
 129                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 130                         break;
 131                 udelay(10);
 132         };
 133
 134         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 135                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 136                         drive->mult_req = drive->mult_count = 0;
 137                         drive->special.b.recalibrate = 1;
 138                         (void)ide_dump_status(drive, __func__, stat);
 139                         return ide_stopped;
 140                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 141                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 142                                 ide_set_handler(drive, &task_no_data_intr,
 143                                                 WAIT_WORSTCASE);
 144                                 return ide_started;
 145                         }
 146                 }
 147                 return ide_error(drive, "task_no_data_intr", stat);
 148         }
 149
 150         if (custom && tf->command == ATA_CMD_SET_MULTI)
 151                 drive->mult_count = drive->mult_req;
 152
 153         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 154             tf->command == ATA_CMD_CHK_POWER) {
 155                 struct request *rq = hwif->rq;
 156
 157                 if (blk_pm_request(rq))
 158                         ide_complete_pm_rq(drive, rq);
 159                 else
 160                         ide_finish_cmd(drive, cmd, stat);
 161         }
 162
 163         return ide_stopped;
 164 }
 165
 166 static u8 wait_drive_not_busy(ide_drive_t *drive)
 167 {
 168         ide_hwif_t *hwif = drive->hwif;
 169         int retries;
 170         u8 stat;
 171
 172         /*
 173          * Last sector was transfered, wait until device is ready.  This can
 174          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 175          */
 176         for (retries = 0; retries < 1000; retries++) {
 177                 stat = hwif->tp_ops->read_status(hwif);
 178
 179                 if (stat & ATA_BUSY)
 180                         udelay(10);
 181                 else
 182                         break;
 183         }
 184
 185         if (stat & ATA_BUSY)
 186                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 187
 188         return stat;
 189 }
 190
 191 static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 192                           unsigned int write, unsigned int len)
 193 {
 194         ide_hwif_t *hwif = drive->hwif;
 195         struct scatterlist *sg = hwif->sg_table;
 196         struct scatterlist *cursg = cmd->cursg;
 197         struct page *page;
 198         unsigned long flags;
 199         unsigned int offset;
 200         u8 *buf;
 201
 202         cursg = cmd->cursg;
 203         if (cursg == NULL)
 204                 cursg = cmd->cursg = sg;
 205
 206         while (len) {
 207                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 208
 209                 if (nr_bytes > PAGE_SIZE)
 210                         nr_bytes = PAGE_SIZE;
 211
 212                 page = sg_page(cursg);
 213                 offset = cursg->offset + cmd->cursg_ofs;
 214
 215                 /* get the current page and offset */
 216                 page = nth_page(page, (offset >> PAGE_SHIFT));
 217                 offset %= PAGE_SIZE;
 218
 219                 if (PageHighMem(page))
 220                         local_irq_save(flags);
 221
 222                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 223
 224                 cmd->nleft -= nr_bytes;
 225                 cmd->cursg_ofs += nr_bytes;
 226
 227                 if (cmd->cursg_ofs == cursg->length) {
 228                         cursg = cmd->cursg = sg_next(cmd->cursg);
 229                         cmd->cursg_ofs = 0;
 230                 }
 231
 232                 /* do the actual data transfer */
 233                 if (write)
 234                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 235                 else
 236                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 237
 238                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 239
 240                 if (PageHighMem(page))
 241                         local_irq_restore(flags);
 242
 243                 len -= nr_bytes;
 244         }
 245 }
 246
 247 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 248                               unsigned int write)
 249 {
 250         unsigned int nr_bytes;
 251
 252         u8 saved_io_32bit = drive->io_32bit;
 253
 254         if (cmd->tf_flags & IDE_TFLAG_FS)
 255                 cmd->rq->errors = 0;
 256
 257         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 258                 drive->io_32bit = 0;
 259
 260         touch_softlockup_watchdog();
 261
 262         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 263                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 264         else
 265                 nr_bytes = SECTOR_SIZE;
 266
 267         ide_pio_bytes(drive, cmd, write, nr_bytes);
 268
 269         drive->io_32bit = saved_io_32bit;
 270 }
 271
 272 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 273 {
 274         if (cmd->tf_flags & IDE_TFLAG_FS) {
 275                 int nr_bytes = cmd->nbytes - cmd->nleft;
 276
 277                 if (cmd->protocol == ATA_PROT_PIO &&
 278                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 279                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 280                                 nr_bytes -= drive->mult_count << 9;
 281                         else
 282                                 nr_bytes -= SECTOR_SIZE;
 283                 }
 284
 285                 if (nr_bytes > 0)
 286                         ide_complete_rq(drive, 0, nr_bytes);
 287         }
 288 }
 289
 290 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 291 {
 292         struct request *rq = drive->hwif->rq;
 293         u8 err = ide_read_error(drive);
 294
 295         ide_complete_cmd(drive, cmd, stat, err);
 296         rq->errors = err;
 297         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 298 }
 299
 300 /*
 301  * Handler for command with PIO data phase.
 302  */
 303 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 304 {
 305         ide_hwif_t *hwif = drive->hwif;
 306         struct ide_cmd *cmd = &drive->hwif->cmd;
 307         u8 stat = hwif->tp_ops->read_status(hwif);
 308         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 309
 310         if (write == 0) {
 311                 /* Error? */
 312                 if (stat & ATA_ERR)
 313                         goto out_err;
 314
 315                 /* Didn't want any data? Odd. */
 316                 if ((stat & ATA_DRQ) == 0) {
 317                         /* Command all done? */
 318                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 319                                 goto out_end;
 320
 321                         /* Assume it was a spurious irq */
 322                         goto out_wait;
 323                 }
 324         } else {
 325                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 326                         goto out_err;
 327
 328                 /* Deal with unexpected ATA data phase. */
 329                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 330                         goto out_err;
 331         }
 332
 333         if (write && cmd->nleft == 0)
 334                 goto out_end;
 335
 336         /* Still data left to transfer. */
 337         ide_pio_datablock(drive, cmd, write);
 338
 339         /* Are we done? Check status and finish transfer. */
 340         if (write == 0 && cmd->nleft == 0) {
 341                 stat = wait_drive_not_busy(drive);
 342                 if (!OK_STAT(stat, 0, BAD_STAT))
 343                         goto out_err;
 344
 345                 goto out_end;
 346         }
 347 out_wait:
 348         /* Still data left to transfer. */
 349         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 350         return ide_started;
 351 out_end:
 352         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 353                 ide_finish_cmd(drive, cmd, stat);
 354         else
 355                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
 356         return ide_stopped;
 357 out_err:
 358         ide_error_cmd(drive, cmd);
 359         return ide_error(drive, __func__, stat);
 360 }
 361
 362 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 363                                          struct ide_cmd *cmd)
 364 {
 365         ide_startstop_t startstop;
 366
 367         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 368                           drive->bad_wstat, WAIT_DRQ)) {
 369                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 370                         drive->name,
 371                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 372                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 373                 return startstop;
 374         }
 375
 376         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 377                 local_irq_disable();
 378
 379         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 380
 381         ide_pio_datablock(drive, cmd, 1);
 382
 383         return ide_started;
 384 }
 385
 386 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 387                      u16 nsect)
 388 {
 389         struct request *rq;
 390         int error;
 391
 392         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 393         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 394         rq->buffer = buf;
 395
 396         /*
 397          * (ks) We transfer currently only whole sectors.
 398          * This is suffient for now.  But, it would be great,
 399          * if we would find a solution to transfer any size.
 400          * To support special commands like READ LONG.
 401          */
 402         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 403         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 404
 405         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 406                 rq->cmd_flags |= REQ_RW;
 407
 408         rq->special = cmd;
 409         cmd->rq = rq;
 410
 411         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 412         blk_put_request(rq);
 413
 414         return error;
 415 }
 416
 417 EXPORT_SYMBOL(ide_raw_taskfile);
 418
 419 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 420 {
 421         cmd->protocol = ATA_PROT_NODATA;
 422
 423         return ide_raw_taskfile(drive, cmd, NULL, 0);
 424 }
 425 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 426
 427 #ifdef CONFIG_IDE_TASK_IOCTL
 428 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 429 {
 430         ide_task_request_t      *req_task;
 431         struct ide_cmd          cmd;
 432         u8 *outbuf              = NULL;
 433         u8 *inbuf               = NULL;
 434         u8 *data_buf            = NULL;
 435         int err                 = 0;
 436         int tasksize            = sizeof(struct ide_task_request_s);
 437         unsigned int taskin     = 0;
 438         unsigned int taskout    = 0;
 439         u16 nsect               = 0;
 440         char __user *buf = (char __user *)arg;
 441
 442 //      printk("IDE Taskfile ...\n");
 443
 444         req_task = kzalloc(tasksize, GFP_KERNEL);
 445         if (req_task == NULL) return -ENOMEM;
 446         if (copy_from_user(req_task, buf, tasksize)) {
 447                 kfree(req_task);
 448                 return -EFAULT;
 449         }
 450
 451         taskout = req_task->out_size;
 452         taskin  = req_task->in_size;
 453
 454         if (taskin > 65536 || taskout > 65536) {
 455                 err = -EINVAL;
 456                 goto abort;
 457         }
 458
 459         if (taskout) {
 460                 int outtotal = tasksize;
 461                 outbuf = kzalloc(taskout, GFP_KERNEL);
 462                 if (outbuf == NULL) {
 463                         err = -ENOMEM;
 464                         goto abort;
 465                 }
 466                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 467                         err = -EFAULT;
 468                         goto abort;
 469                 }
 470         }
 471
 472         if (taskin) {
 473                 int intotal = tasksize + taskout;
 474                 inbuf = kzalloc(taskin, GFP_KERNEL);
 475                 if (inbuf == NULL) {
 476                         err = -ENOMEM;
 477                         goto abort;
 478                 }
 479                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 480                         err = -EFAULT;
 481                         goto abort;
 482                 }
 483         }
 484
 485         memset(&cmd, 0, sizeof(cmd));
 486
 487         memcpy(&cmd.tf_array[0], req_task->hob_ports,
 488                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 489         memcpy(&cmd.tf_array[6], req_task->io_ports,
 490                HDIO_DRIVE_TASK_HDR_SIZE);
 491
 492         cmd.tf_flags   = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 493                          IDE_TFLAG_IN_TF;
 494
 495         if (drive->dev_flags & IDE_DFLAG_LBA48)
 496                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 497
 498         if (req_task->out_flags.all) {
 499                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 500
 501                 if (req_task->out_flags.b.data)
 502                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 503
 504                 if (req_task->out_flags.b.nsector_hob)
 505                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 506                 if (req_task->out_flags.b.sector_hob)
 507                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 508                 if (req_task->out_flags.b.lcyl_hob)
 509                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 510                 if (req_task->out_flags.b.hcyl_hob)
 511                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 512
 513                 if (req_task->out_flags.b.error_feature)
 514                         cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 515                 if (req_task->out_flags.b.nsector)
 516                         cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
 517                 if (req_task->out_flags.b.sector)
 518                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
 519                 if (req_task->out_flags.b.lcyl)
 520                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
 521                 if (req_task->out_flags.b.hcyl)
 522                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
 523         } else {
 524                 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
 525                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 526                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
 527         }
 528
 529         if (req_task->in_flags.b.data)
 530                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 531
 532         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 533                 /* fixup data phase if needed */
 534                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 535                     req_task->data_phase == TASKFILE_IN_DMA)
 536                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 537         }
 538
 539         cmd.protocol = ATA_PROT_DMA;
 540
 541         switch (req_task->data_phase) {
 542                 case TASKFILE_MULTI_OUT:
 543                         if (!drive->mult_count) {
 544                                 /* (hs): give up if multcount is not set */
 545                                 printk(KERN_ERR "%s: %s Multimode Write " \
 546                                         "multcount is not set\n",
 547                                         drive->name, __func__);
 548                                 err = -EPERM;
 549                                 goto abort;
 550                         }
 551                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 552                         /* fall through */
 553                 case TASKFILE_OUT:
 554                         cmd.protocol = ATA_PROT_PIO;
 555                         /* fall through */
 556                 case TASKFILE_OUT_DMAQ:
 557                 case TASKFILE_OUT_DMA:
 558                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 559                         nsect = taskout / SECTOR_SIZE;
 560                         data_buf = outbuf;
 561                         break;
 562                 case TASKFILE_MULTI_IN:
 563                         if (!drive->mult_count) {
 564                                 /* (hs): give up if multcount is not set */
 565                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 566                                         "multcount is not set\n",
 567                                         drive->name, __func__);
 568                                 err = -EPERM;
 569                                 goto abort;
 570                         }
 571                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 572                         /* fall through */
 573                 case TASKFILE_IN:
 574                         cmd.protocol = ATA_PROT_PIO;
 575                         /* fall through */
 576                 case TASKFILE_IN_DMAQ:
 577                 case TASKFILE_IN_DMA:
 578                         nsect = taskin / SECTOR_SIZE;
 579                         data_buf = inbuf;
 580                         break;
 581                 case TASKFILE_NO_DATA:
 582                         cmd.protocol = ATA_PROT_NODATA;
 583                         break;
 584                 default:
 585                         err = -EFAULT;
 586                         goto abort;
 587         }
 588
 589         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 590                 nsect = 0;
 591         else if (!nsect) {
 592                 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
 593
 594                 if (!nsect) {
 595                         printk(KERN_ERR "%s: in/out command without data\n",
 596                                         drive->name);
 597                         err = -EFAULT;
 598                         goto abort;
 599                 }
 600         }
 601
 602         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 603
 604         memcpy(req_task->hob_ports, &cmd.tf_array[0],
 605                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 606         memcpy(req_task->io_ports, &cmd.tf_array[6],
 607                HDIO_DRIVE_TASK_HDR_SIZE);
 608
 609         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 610             req_task->in_flags.all == 0) {
 611                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 612                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 613                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 614         }
 615
 616         if (copy_to_user(buf, req_task, tasksize)) {
 617                 err = -EFAULT;
 618                 goto abort;
 619         }
 620         if (taskout) {
 621                 int outtotal = tasksize;
 622                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 623                         err = -EFAULT;
 624                         goto abort;
 625                 }
 626         }
 627         if (taskin) {
 628                 int intotal = tasksize + taskout;
 629                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 630                         err = -EFAULT;
 631                         goto abort;
 632                 }
 633         }
 634 abort:
 635         kfree(req_task);
 636         kfree(outbuf);
 637         kfree(inbuf);
 638
 639 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 640
 641         return err;
 642 }
 643 #endif