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