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 ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 104                     ide_build_sglist(drive, cmd) == 0 ||
 105                     dma_ops->dma_setup(drive, cmd))
 106                         return ide_stopped;
 107                 hwif->expiry = dma_ops->dma_timer_expiry;
 108                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 109                 dma_ops->dma_start(drive);
 110         default:
 111                 return ide_started;
 112         }
 113 }
 114 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 115
 116 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 117 {
 118         ide_hwif_t *hwif = drive->hwif;
 119         struct ide_cmd *cmd = &hwif->cmd;
 120         struct ide_taskfile *tf = &cmd->tf;
 121         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 122         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 123         u8 stat;
 124
 125         local_irq_enable_in_hardirq();
 126
 127         while (1) {
 128                 stat = hwif->tp_ops->read_status(hwif);
 129                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 130                         break;
 131                 udelay(10);
 132         };
 133
 134         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 135                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 136                         drive->mult_req = drive->mult_count = 0;
 137                         drive->special.b.recalibrate = 1;
 138                         (void)ide_dump_status(drive, __func__, stat);
 139                         return ide_stopped;
 140                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 141                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 142                                 ide_set_handler(drive, &task_no_data_intr,
 143                                                 WAIT_WORSTCASE);
 144                                 return ide_started;
 145                         }
 146                 }
 147                 return ide_error(drive, "task_no_data_intr", stat);
 148         }
 149
 150         if (custom && tf->command == ATA_CMD_SET_MULTI)
 151                 drive->mult_count = drive->mult_req;
 152
 153         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 154             tf->command == ATA_CMD_CHK_POWER) {
 155                 struct request *rq = hwif->rq;
 156
 157                 if (blk_pm_request(rq))
 158                         ide_complete_pm_rq(drive, rq);
 159                 else
 160                         ide_finish_cmd(drive, cmd, stat);
 161         }
 162
 163         return ide_stopped;
 164 }
 165
 166 static u8 wait_drive_not_busy(ide_drive_t *drive)
 167 {
 168         ide_hwif_t *hwif = drive->hwif;
 169         int retries;
 170         u8 stat;
 171
 172         /*
 173          * Last sector was transfered, wait until device is ready.  This can
 174          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 175          */
 176         for (retries = 0; retries < 1000; retries++) {
 177                 stat = hwif->tp_ops->read_status(hwif);
 178
 179                 if (stat & ATA_BUSY)
 180                         udelay(10);
 181                 else
 182                         break;
 183         }
 184
 185         if (stat & ATA_BUSY)
 186                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 187
 188         return stat;
 189 }
 190
 191 static void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 192                           unsigned int write, unsigned int len)
 193 {
 194         ide_hwif_t *hwif = drive->hwif;
 195         struct scatterlist *sg = hwif->sg_table;
 196         struct scatterlist *cursg = cmd->cursg;
 197         struct page *page;
 198 #ifdef CONFIG_HIGHMEM
 199         unsigned long flags;
 200 #endif
 201         unsigned int offset;
 202         u8 *buf;
 203
 204         cursg = cmd->cursg;
 205         if (cursg == NULL)
 206                 cursg = cmd->cursg = sg;
 207
 208         while (len) {
 209                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 210
 211                 if (nr_bytes > PAGE_SIZE)
 212                         nr_bytes = PAGE_SIZE;
 213
 214                 page = sg_page(cursg);
 215                 offset = cursg->offset + cmd->cursg_ofs;
 216
 217                 /* get the current page and offset */
 218                 page = nth_page(page, (offset >> PAGE_SHIFT));
 219                 offset %= PAGE_SIZE;
 220
 221 #ifdef CONFIG_HIGHMEM
 222                 local_irq_save(flags);
 223 #endif
 224                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 225
 226                 cmd->nleft -= nr_bytes;
 227                 cmd->cursg_ofs += nr_bytes;
 228
 229                 if (cmd->cursg_ofs == cursg->length) {
 230                         cursg = cmd->cursg = sg_next(cmd->cursg);
 231                         cmd->cursg_ofs = 0;
 232                 }
 233
 234                 /* do the actual data transfer */
 235                 if (write)
 236                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 237                 else
 238                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 239
 240                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 241 #ifdef CONFIG_HIGHMEM
 242                 local_irq_restore(flags);
 243 #endif
 244
 245                 len -= nr_bytes;
 246         }
 247 }
 248
 249 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 250                               unsigned int write)
 251 {
 252         unsigned int nr_bytes;
 253
 254         u8 saved_io_32bit = drive->io_32bit;
 255
 256         if (cmd->tf_flags & IDE_TFLAG_FS)
 257                 cmd->rq->errors = 0;
 258
 259         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 260                 drive->io_32bit = 0;
 261
 262         touch_softlockup_watchdog();
 263
 264         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 265                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 266         else
 267                 nr_bytes = SECTOR_SIZE;
 268
 269         ide_pio_bytes(drive, cmd, write, nr_bytes);
 270
 271         drive->io_32bit = saved_io_32bit;
 272 }
 273
 274 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 275 {
 276         if (cmd->tf_flags & IDE_TFLAG_FS) {
 277                 int nr_bytes = cmd->nbytes - cmd->nleft;
 278
 279                 if (cmd->protocol == ATA_PROT_PIO &&
 280                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 281                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 282                                 nr_bytes -= drive->mult_count << 9;
 283                         else
 284                                 nr_bytes -= SECTOR_SIZE;
 285                 }
 286
 287                 if (nr_bytes > 0)
 288                         ide_complete_rq(drive, 0, nr_bytes);
 289         }
 290 }
 291
 292 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 293 {
 294         struct request *rq = drive->hwif->rq;
 295         u8 err = ide_read_error(drive);
 296
 297         ide_complete_cmd(drive, cmd, stat, err);
 298         rq->errors = err;
 299         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 300 }
 301
 302 /*
 303  * Handler for command with PIO data phase.
 304  */
 305 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 306 {
 307         ide_hwif_t *hwif = drive->hwif;
 308         struct ide_cmd *cmd = &drive->hwif->cmd;
 309         u8 stat = hwif->tp_ops->read_status(hwif);
 310         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 311
 312         if (write == 0) {
 313                 /* Error? */
 314                 if (stat & ATA_ERR)
 315                         goto out_err;
 316
 317                 /* Didn't want any data? Odd. */
 318                 if ((stat & ATA_DRQ) == 0) {
 319                         /* Command all done? */
 320                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 321                                 goto out_end;
 322
 323                         /* Assume it was a spurious irq */
 324                         goto out_wait;
 325                 }
 326         } else {
 327                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 328                         goto out_err;
 329
 330                 /* Deal with unexpected ATA data phase. */
 331                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 332                         goto out_err;
 333         }
 334
 335         if (write && cmd->nleft == 0)
 336                 goto out_end;
 337
 338         /* Still data left to transfer. */
 339         ide_pio_datablock(drive, cmd, write);
 340
 341         /* Are we done? Check status and finish transfer. */
 342         if (write == 0 && cmd->nleft == 0) {
 343                 stat = wait_drive_not_busy(drive);
 344                 if (!OK_STAT(stat, 0, BAD_STAT))
 345                         goto out_err;
 346
 347                 goto out_end;
 348         }
 349 out_wait:
 350         /* Still data left to transfer. */
 351         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 352         return ide_started;
 353 out_end:
 354         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 355                 ide_finish_cmd(drive, cmd, stat);
 356         else
 357                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
 358         return ide_stopped;
 359 out_err:
 360         ide_error_cmd(drive, cmd);
 361         return ide_error(drive, __func__, stat);
 362 }
 363
 364 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 365                                          struct ide_cmd *cmd)
 366 {
 367         ide_startstop_t startstop;
 368
 369         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 370                           drive->bad_wstat, WAIT_DRQ)) {
 371                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 372                         drive->name,
 373                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 374                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 375                 return startstop;
 376         }
 377
 378         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 379                 local_irq_disable();
 380
 381         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 382
 383         ide_pio_datablock(drive, cmd, 1);
 384
 385         return ide_started;
 386 }
 387
 388 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 389                      u16 nsect)
 390 {
 391         struct request *rq;
 392         int error;
 393
 394         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 395         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 396         rq->buffer = buf;
 397
 398         /*
 399          * (ks) We transfer currently only whole sectors.
 400          * This is suffient for now.  But, it would be great,
 401          * if we would find a solution to transfer any size.
 402          * To support special commands like READ LONG.
 403          */
 404         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 405         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 406
 407         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 408                 rq->cmd_flags |= REQ_RW;
 409
 410         rq->special = cmd;
 411         cmd->rq = rq;
 412
 413         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 414         blk_put_request(rq);
 415
 416         return error;
 417 }
 418
 419 EXPORT_SYMBOL(ide_raw_taskfile);
 420
 421 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 422 {
 423         cmd->protocol = ATA_PROT_NODATA;
 424
 425         return ide_raw_taskfile(drive, cmd, NULL, 0);
 426 }
 427 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 428
 429 #ifdef CONFIG_IDE_TASK_IOCTL
 430 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 431 {
 432         ide_task_request_t      *req_task;
 433         struct ide_cmd          cmd;
 434         u8 *outbuf              = NULL;
 435         u8 *inbuf               = NULL;
 436         u8 *data_buf            = NULL;
 437         int err                 = 0;
 438         int tasksize            = sizeof(struct ide_task_request_s);
 439         unsigned int taskin     = 0;
 440         unsigned int taskout    = 0;
 441         u16 nsect               = 0;
 442         char __user *buf = (char __user *)arg;
 443
 444 //      printk("IDE Taskfile ...\n");
 445
 446         req_task = kzalloc(tasksize, GFP_KERNEL);
 447         if (req_task == NULL) return -ENOMEM;
 448         if (copy_from_user(req_task, buf, tasksize)) {
 449                 kfree(req_task);
 450                 return -EFAULT;
 451         }
 452
 453         taskout = req_task->out_size;
 454         taskin  = req_task->in_size;
 455
 456         if (taskin > 65536 || taskout > 65536) {
 457                 err = -EINVAL;
 458                 goto abort;
 459         }
 460
 461         if (taskout) {
 462                 int outtotal = tasksize;
 463                 outbuf = kzalloc(taskout, GFP_KERNEL);
 464                 if (outbuf == NULL) {
 465                         err = -ENOMEM;
 466                         goto abort;
 467                 }
 468                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 469                         err = -EFAULT;
 470                         goto abort;
 471                 }
 472         }
 473
 474         if (taskin) {
 475                 int intotal = tasksize + taskout;
 476                 inbuf = kzalloc(taskin, GFP_KERNEL);
 477                 if (inbuf == NULL) {
 478                         err = -ENOMEM;
 479                         goto abort;
 480                 }
 481                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 482                         err = -EFAULT;
 483                         goto abort;
 484                 }
 485         }
 486
 487         memset(&cmd, 0, sizeof(cmd));
 488
 489         memcpy(&cmd.tf_array[0], req_task->hob_ports,
 490                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 491         memcpy(&cmd.tf_array[6], req_task->io_ports,
 492                HDIO_DRIVE_TASK_HDR_SIZE);
 493
 494         cmd.tf_flags   = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 495                          IDE_TFLAG_IN_TF;
 496
 497         if (drive->dev_flags & IDE_DFLAG_LBA48)
 498                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 499
 500         if (req_task->out_flags.all) {
 501                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 502
 503                 if (req_task->out_flags.b.data)
 504                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 505
 506                 if (req_task->out_flags.b.nsector_hob)
 507                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 508                 if (req_task->out_flags.b.sector_hob)
 509                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 510                 if (req_task->out_flags.b.lcyl_hob)
 511                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 512                 if (req_task->out_flags.b.hcyl_hob)
 513                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 514
 515                 if (req_task->out_flags.b.error_feature)
 516                         cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 517                 if (req_task->out_flags.b.nsector)
 518                         cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
 519                 if (req_task->out_flags.b.sector)
 520                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
 521                 if (req_task->out_flags.b.lcyl)
 522                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
 523                 if (req_task->out_flags.b.hcyl)
 524                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
 525         } else {
 526                 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
 527                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 528                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
 529         }
 530
 531         if (req_task->in_flags.b.data)
 532                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 533
 534         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 535                 /* fixup data phase if needed */
 536                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 537                     req_task->data_phase == TASKFILE_IN_DMA)
 538                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 539         }
 540
 541         cmd.protocol = ATA_PROT_DMA;
 542
 543         switch (req_task->data_phase) {
 544                 case TASKFILE_MULTI_OUT:
 545                         if (!drive->mult_count) {
 546                                 /* (hs): give up if multcount is not set */
 547                                 printk(KERN_ERR "%s: %s Multimode Write " \
 548                                         "multcount is not set\n",
 549                                         drive->name, __func__);
 550                                 err = -EPERM;
 551                                 goto abort;
 552                         }
 553                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 554                         /* fall through */
 555                 case TASKFILE_OUT:
 556                         cmd.protocol = ATA_PROT_PIO;
 557                         /* fall through */
 558                 case TASKFILE_OUT_DMAQ:
 559                 case TASKFILE_OUT_DMA:
 560                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 561                         nsect = taskout / SECTOR_SIZE;
 562                         data_buf = outbuf;
 563                         break;
 564                 case TASKFILE_MULTI_IN:
 565                         if (!drive->mult_count) {
 566                                 /* (hs): give up if multcount is not set */
 567                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 568                                         "multcount is not set\n",
 569                                         drive->name, __func__);
 570                                 err = -EPERM;
 571                                 goto abort;
 572                         }
 573                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 574                         /* fall through */
 575                 case TASKFILE_IN:
 576                         cmd.protocol = ATA_PROT_PIO;
 577                         /* fall through */
 578                 case TASKFILE_IN_DMAQ:
 579                 case TASKFILE_IN_DMA:
 580                         nsect = taskin / SECTOR_SIZE;
 581                         data_buf = inbuf;
 582                         break;
 583                 case TASKFILE_NO_DATA:
 584                         cmd.protocol = ATA_PROT_NODATA;
 585                         break;
 586                 default:
 587                         err = -EFAULT;
 588                         goto abort;
 589         }
 590
 591         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 592                 nsect = 0;
 593         else if (!nsect) {
 594                 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
 595
 596                 if (!nsect) {
 597                         printk(KERN_ERR "%s: in/out command without data\n",
 598                                         drive->name);
 599                         err = -EFAULT;
 600                         goto abort;
 601                 }
 602         }
 603
 604         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 605
 606         memcpy(req_task->hob_ports, &cmd.tf_array[0],
 607                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 608         memcpy(req_task->io_ports, &cmd.tf_array[6],
 609                HDIO_DRIVE_TASK_HDR_SIZE);
 610
 611         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 612             req_task->in_flags.all == 0) {
 613                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 614                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 615                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 616         }
 617
 618         if (copy_to_user(buf, req_task, tasksize)) {
 619                 err = -EFAULT;
 620                 goto abort;
 621         }
 622         if (taskout) {
 623                 int outtotal = tasksize;
 624                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 625                         err = -EFAULT;
 626                         goto abort;
 627                 }
 628         }
 629         if (taskin) {
 630                 int intotal = tasksize + taskout;
 631                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 632                         err = -EFAULT;
 633                         goto abort;
 634                 }
 635         }
 636 abort:
 637         kfree(req_task);
 638         kfree(outbuf);
 639         kfree(inbuf);
 640
 641 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 642
 643         return err;
 644 }
 645 #endif