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