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