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_cmd *cmd)
  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, cmd->tf.feature, cmd->tf.nsect,
  32                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  33                cmd->tf.device, cmd->tf.command);
  34         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  35                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  36 #endif
  37 }
  38
  39 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  40 {
  41         struct ide_cmd cmd;
  42
  43         memset(&cmd, 0, sizeof(cmd));
  44         cmd.tf.nsect = 0x01;
  45         if (drive->media == ide_disk)
  46                 cmd.tf.command = ATA_CMD_ID_ATA;
  47         else
  48                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  49         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  50         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_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, cmd);
  83                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  84                 SELECT_MASK(drive, 0);
  85
  86                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
  87                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
  88
  89                         tp_ops->output_data(drive, cmd, data, 2);
  90                 }
  91
  92                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
  93                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
  94                                   0xE0 : 0xEF;
  95
  96                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
  97                                 cmd->tf.device &= HIHI;
  98                         cmd->tf.device |= drive->select;
  99                 }
 100
 101                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 102                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 103         }
 104
 105         switch (cmd->protocol) {
 106         case ATA_PROT_PIO:
 107                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 108                         tp_ops->exec_command(hwif, tf->command);
 109                         ndelay(400);    /* FIXME */
 110                         return pre_task_out_intr(drive, cmd);
 111                 }
 112                 handler = task_pio_intr;
 113                 /* fall-through */
 114         case ATA_PROT_NODATA:
 115                 if (handler == NULL)
 116                         handler = task_no_data_intr;
 117                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 118                 return ide_started;
 119         case ATA_PROT_DMA:
 120                 if (ide_dma_prepare(drive, cmd))
 121                         return ide_stopped;
 122                 hwif->expiry = dma_ops->dma_timer_expiry;
 123                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 124                 dma_ops->dma_start(drive);
 125         default:
 126                 return ide_started;
 127         }
 128 }
 129 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 130
 131 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 132 {
 133         ide_hwif_t *hwif = drive->hwif;
 134         struct ide_cmd *cmd = &hwif->cmd;
 135         struct ide_taskfile *tf = &cmd->tf;
 136         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 137         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 138         u8 stat;
 139
 140         local_irq_enable_in_hardirq();
 141
 142         while (1) {
 143                 stat = hwif->tp_ops->read_status(hwif);
 144                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 145                         break;
 146                 udelay(10);
 147         };
 148
 149         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 150                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 151                         drive->mult_req = drive->mult_count = 0;
 152                         drive->special.b.recalibrate = 1;
 153                         (void)ide_dump_status(drive, __func__, stat);
 154                         return ide_stopped;
 155                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 156                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 157                                 ide_set_handler(drive, &task_no_data_intr,
 158                                                 WAIT_WORSTCASE);
 159                                 return ide_started;
 160                         }
 161                 }
 162                 return ide_error(drive, "task_no_data_intr", stat);
 163         }
 164
 165         if (custom && tf->command == ATA_CMD_SET_MULTI)
 166                 drive->mult_count = drive->mult_req;
 167
 168         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 169             tf->command == ATA_CMD_CHK_POWER) {
 170                 struct request *rq = hwif->rq;
 171
 172                 if (blk_pm_request(rq))
 173                         ide_complete_pm_rq(drive, rq);
 174                 else
 175                         ide_finish_cmd(drive, cmd, stat);
 176         }
 177
 178         return ide_stopped;
 179 }
 180
 181 static u8 wait_drive_not_busy(ide_drive_t *drive)
 182 {
 183         ide_hwif_t *hwif = drive->hwif;
 184         int retries;
 185         u8 stat;
 186
 187         /*
 188          * Last sector was transfered, wait until device is ready.  This can
 189          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 190          */
 191         for (retries = 0; retries < 1000; retries++) {
 192                 stat = hwif->tp_ops->read_status(hwif);
 193
 194                 if (stat & ATA_BUSY)
 195                         udelay(10);
 196                 else
 197                         break;
 198         }
 199
 200         if (stat & ATA_BUSY)
 201                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 202
 203         return stat;
 204 }
 205
 206 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 207                    unsigned int write, unsigned int len)
 208 {
 209         ide_hwif_t *hwif = drive->hwif;
 210         struct scatterlist *sg = hwif->sg_table;
 211         struct scatterlist *cursg = cmd->cursg;
 212         struct page *page;
 213         unsigned long flags;
 214         unsigned int offset;
 215         u8 *buf;
 216
 217         cursg = cmd->cursg;
 218         if (cursg == NULL)
 219                 cursg = cmd->cursg = sg;
 220
 221         while (len) {
 222                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 223
 224                 if (nr_bytes > PAGE_SIZE)
 225                         nr_bytes = PAGE_SIZE;
 226
 227                 page = sg_page(cursg);
 228                 offset = cursg->offset + cmd->cursg_ofs;
 229
 230                 /* get the current page and offset */
 231                 page = nth_page(page, (offset >> PAGE_SHIFT));
 232                 offset %= PAGE_SIZE;
 233
 234                 if (PageHighMem(page))
 235                         local_irq_save(flags);
 236
 237                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 238
 239                 cmd->nleft -= nr_bytes;
 240                 cmd->cursg_ofs += nr_bytes;
 241
 242                 if (cmd->cursg_ofs == cursg->length) {
 243                         cursg = cmd->cursg = sg_next(cmd->cursg);
 244                         cmd->cursg_ofs = 0;
 245                 }
 246
 247                 /* do the actual data transfer */
 248                 if (write)
 249                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 250                 else
 251                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 252
 253                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 254
 255                 if (PageHighMem(page))
 256                         local_irq_restore(flags);
 257
 258                 len -= nr_bytes;
 259         }
 260 }
 261 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 262
 263 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 264                               unsigned int write)
 265 {
 266         unsigned int nr_bytes;
 267
 268         u8 saved_io_32bit = drive->io_32bit;
 269
 270         if (cmd->tf_flags & IDE_TFLAG_FS)
 271                 cmd->rq->errors = 0;
 272
 273         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 274                 drive->io_32bit = 0;
 275
 276         touch_softlockup_watchdog();
 277
 278         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 279                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 280         else
 281                 nr_bytes = SECTOR_SIZE;
 282
 283         ide_pio_bytes(drive, cmd, write, nr_bytes);
 284
 285         drive->io_32bit = saved_io_32bit;
 286 }
 287
 288 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 289 {
 290         if (cmd->tf_flags & IDE_TFLAG_FS) {
 291                 int nr_bytes = cmd->nbytes - cmd->nleft;
 292
 293                 if (cmd->protocol == ATA_PROT_PIO &&
 294                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 295                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 296                                 nr_bytes -= drive->mult_count << 9;
 297                         else
 298                                 nr_bytes -= SECTOR_SIZE;
 299                 }
 300
 301                 if (nr_bytes > 0)
 302                         ide_complete_rq(drive, 0, nr_bytes);
 303         }
 304 }
 305
 306 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 307 {
 308         struct request *rq = drive->hwif->rq;
 309         u8 err = ide_read_error(drive);
 310
 311         ide_complete_cmd(drive, cmd, stat, err);
 312         rq->errors = err;
 313         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 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                         goto out_err;
 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                                 goto out_end;
 336
 337                         /* Assume it was a spurious irq */
 338                         goto out_wait;
 339                 }
 340         } else {
 341                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 342                         goto out_err;
 343
 344                 /* Deal with unexpected ATA data phase. */
 345                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 346                         goto out_err;
 347         }
 348
 349         if (write && cmd->nleft == 0)
 350                 goto out_end;
 351
 352         /* Still data left to transfer. */
 353         ide_pio_datablock(drive, cmd, write);
 354
 355         /* Are we done? Check status and finish transfer. */
 356         if (write == 0 && cmd->nleft == 0) {
 357                 stat = wait_drive_not_busy(drive);
 358                 if (!OK_STAT(stat, 0, BAD_STAT))
 359                         goto out_err;
 360
 361                 goto out_end;
 362         }
 363 out_wait:
 364         /* Still data left to transfer. */
 365         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 366         return ide_started;
 367 out_end:
 368         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 369                 ide_finish_cmd(drive, cmd, stat);
 370         else
 371                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
 372         return ide_stopped;
 373 out_err:
 374         ide_error_cmd(drive, cmd);
 375         return ide_error(drive, __func__, stat);
 376 }
 377
 378 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 379                                          struct ide_cmd *cmd)
 380 {
 381         ide_startstop_t startstop;
 382
 383         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 384                           drive->bad_wstat, WAIT_DRQ)) {
 385                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 386                         drive->name,
 387                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 388                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 389                 return startstop;
 390         }
 391
 392         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 393                 local_irq_disable();
 394
 395         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 396
 397         ide_pio_datablock(drive, cmd, 1);
 398
 399         return ide_started;
 400 }
 401
 402 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 403                      u16 nsect)
 404 {
 405         struct request *rq;
 406         int error;
 407
 408         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 409         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 410         rq->buffer = buf;
 411
 412         /*
 413          * (ks) We transfer currently only whole sectors.
 414          * This is suffient for now.  But, it would be great,
 415          * if we would find a solution to transfer any size.
 416          * To support special commands like READ LONG.
 417          */
 418         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 419         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 420
 421         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 422                 rq->cmd_flags |= REQ_RW;
 423
 424         rq->special = cmd;
 425         cmd->rq = rq;
 426
 427         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 428         blk_put_request(rq);
 429
 430         return error;
 431 }
 432
 433 EXPORT_SYMBOL(ide_raw_taskfile);
 434
 435 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 436 {
 437         cmd->protocol = ATA_PROT_NODATA;
 438
 439         return ide_raw_taskfile(drive, cmd, NULL, 0);
 440 }
 441 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 442
 443 #ifdef CONFIG_IDE_TASK_IOCTL
 444 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 445 {
 446         ide_task_request_t      *req_task;
 447         struct ide_cmd          cmd;
 448         u8 *outbuf              = NULL;
 449         u8 *inbuf               = NULL;
 450         u8 *data_buf            = NULL;
 451         int err                 = 0;
 452         int tasksize            = sizeof(struct ide_task_request_s);
 453         unsigned int taskin     = 0;
 454         unsigned int taskout    = 0;
 455         u16 nsect               = 0;
 456         char __user *buf = (char __user *)arg;
 457
 458 //      printk("IDE Taskfile ...\n");
 459
 460         req_task = kzalloc(tasksize, GFP_KERNEL);
 461         if (req_task == NULL) return -ENOMEM;
 462         if (copy_from_user(req_task, buf, tasksize)) {
 463                 kfree(req_task);
 464                 return -EFAULT;
 465         }
 466
 467         taskout = req_task->out_size;
 468         taskin  = req_task->in_size;
 469
 470         if (taskin > 65536 || taskout > 65536) {
 471                 err = -EINVAL;
 472                 goto abort;
 473         }
 474
 475         if (taskout) {
 476                 int outtotal = tasksize;
 477                 outbuf = kzalloc(taskout, GFP_KERNEL);
 478                 if (outbuf == NULL) {
 479                         err = -ENOMEM;
 480                         goto abort;
 481                 }
 482                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 483                         err = -EFAULT;
 484                         goto abort;
 485                 }
 486         }
 487
 488         if (taskin) {
 489                 int intotal = tasksize + taskout;
 490                 inbuf = kzalloc(taskin, GFP_KERNEL);
 491                 if (inbuf == NULL) {
 492                         err = -ENOMEM;
 493                         goto abort;
 494                 }
 495                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 496                         err = -EFAULT;
 497                         goto abort;
 498                 }
 499         }
 500
 501         memset(&cmd, 0, sizeof(cmd));
 502
 503         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 504         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 505
 506         cmd.valid.out.tf = IDE_VALID_DEVICE;
 507         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 508         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 509
 510         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 511                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 512                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 513         }
 514
 515         if (req_task->out_flags.all) {
 516                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 517
 518                 if (req_task->out_flags.b.data)
 519                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 520
 521                 if (req_task->out_flags.b.nsector_hob)
 522                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 523                 if (req_task->out_flags.b.sector_hob)
 524                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 525                 if (req_task->out_flags.b.lcyl_hob)
 526                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 527                 if (req_task->out_flags.b.hcyl_hob)
 528                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 529
 530                 if (req_task->out_flags.b.error_feature)
 531                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 532                 if (req_task->out_flags.b.nsector)
 533                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 534                 if (req_task->out_flags.b.sector)
 535                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 536                 if (req_task->out_flags.b.lcyl)
 537                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 538                 if (req_task->out_flags.b.hcyl)
 539                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 540         } else {
 541                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 542                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 543                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 544         }
 545
 546         if (req_task->in_flags.b.data)
 547                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 548
 549         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 550                 /* fixup data phase if needed */
 551                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 552                     req_task->data_phase == TASKFILE_IN_DMA)
 553                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 554         }
 555
 556         cmd.protocol = ATA_PROT_DMA;
 557
 558         switch (req_task->data_phase) {
 559                 case TASKFILE_MULTI_OUT:
 560                         if (!drive->mult_count) {
 561                                 /* (hs): give up if multcount is not set */
 562                                 printk(KERN_ERR "%s: %s Multimode Write " \
 563                                         "multcount is not set\n",
 564                                         drive->name, __func__);
 565                                 err = -EPERM;
 566                                 goto abort;
 567                         }
 568                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 569                         /* fall through */
 570                 case TASKFILE_OUT:
 571                         cmd.protocol = ATA_PROT_PIO;
 572                         /* fall through */
 573                 case TASKFILE_OUT_DMAQ:
 574                 case TASKFILE_OUT_DMA:
 575                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 576                         nsect = taskout / SECTOR_SIZE;
 577                         data_buf = outbuf;
 578                         break;
 579                 case TASKFILE_MULTI_IN:
 580                         if (!drive->mult_count) {
 581                                 /* (hs): give up if multcount is not set */
 582                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 583                                         "multcount is not set\n",
 584                                         drive->name, __func__);
 585                                 err = -EPERM;
 586                                 goto abort;
 587                         }
 588                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 589                         /* fall through */
 590                 case TASKFILE_IN:
 591                         cmd.protocol = ATA_PROT_PIO;
 592                         /* fall through */
 593                 case TASKFILE_IN_DMAQ:
 594                 case TASKFILE_IN_DMA:
 595                         nsect = taskin / SECTOR_SIZE;
 596                         data_buf = inbuf;
 597                         break;
 598                 case TASKFILE_NO_DATA:
 599                         cmd.protocol = ATA_PROT_NODATA;
 600                         break;
 601                 default:
 602                         err = -EFAULT;
 603                         goto abort;
 604         }
 605
 606         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 607                 nsect = 0;
 608         else if (!nsect) {
 609                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 610
 611                 if (!nsect) {
 612                         printk(KERN_ERR "%s: in/out command without data\n",
 613                                         drive->name);
 614                         err = -EFAULT;
 615                         goto abort;
 616                 }
 617         }
 618
 619         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 620
 621         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 622         memcpy(req_task->io_ports,  &cmd.tf,  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