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->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] = { tf->data, tf->hob_data };
  88
  89                         tp_ops->output_data(drive, cmd, data, 2);
  90                 }
  91                 tp_ops->tf_load(drive, cmd);
  92         }
  93
  94         switch (cmd->protocol) {
  95         case ATA_PROT_PIO:
  96                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
  97                         tp_ops->exec_command(hwif, tf->command);
  98                         ndelay(400);    /* FIXME */
  99                         return pre_task_out_intr(drive, cmd);
 100                 }
 101                 handler = task_pio_intr;
 102                 /* fall-through */
 103         case ATA_PROT_NODATA:
 104                 if (handler == NULL)
 105                         handler = task_no_data_intr;
 106                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 107                 return ide_started;
 108         case ATA_PROT_DMA:
 109                 if (ide_dma_prepare(drive, cmd))
 110                         return ide_stopped;
 111                 hwif->expiry = dma_ops->dma_timer_expiry;
 112                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 113                 dma_ops->dma_start(drive);
 114         default:
 115                 return ide_started;
 116         }
 117 }
 118 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 119
 120 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 121 {
 122         ide_hwif_t *hwif = drive->hwif;
 123         struct ide_cmd *cmd = &hwif->cmd;
 124         struct ide_taskfile *tf = &cmd->tf;
 125         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 126         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 127         u8 stat;
 128
 129         local_irq_enable_in_hardirq();
 130
 131         while (1) {
 132                 stat = hwif->tp_ops->read_status(hwif);
 133                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 134                         break;
 135                 udelay(10);
 136         };
 137
 138         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 139                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 140                         drive->mult_req = drive->mult_count = 0;
 141                         drive->special.b.recalibrate = 1;
 142                         (void)ide_dump_status(drive, __func__, stat);
 143                         return ide_stopped;
 144                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 145                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 146                                 ide_set_handler(drive, &task_no_data_intr,
 147                                                 WAIT_WORSTCASE);
 148                                 return ide_started;
 149                         }
 150                 }
 151                 return ide_error(drive, "task_no_data_intr", stat);
 152         }
 153
 154         if (custom && tf->command == ATA_CMD_SET_MULTI)
 155                 drive->mult_count = drive->mult_req;
 156
 157         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 158             tf->command == ATA_CMD_CHK_POWER) {
 159                 struct request *rq = hwif->rq;
 160
 161                 if (blk_pm_request(rq))
 162                         ide_complete_pm_rq(drive, rq);
 163                 else
 164                         ide_finish_cmd(drive, cmd, stat);
 165         }
 166
 167         return ide_stopped;
 168 }
 169
 170 static u8 wait_drive_not_busy(ide_drive_t *drive)
 171 {
 172         ide_hwif_t *hwif = drive->hwif;
 173         int retries;
 174         u8 stat;
 175
 176         /*
 177          * Last sector was transfered, wait until device is ready.  This can
 178          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 179          */
 180         for (retries = 0; retries < 1000; retries++) {
 181                 stat = hwif->tp_ops->read_status(hwif);
 182
 183                 if (stat & ATA_BUSY)
 184                         udelay(10);
 185                 else
 186                         break;
 187         }
 188
 189         if (stat & ATA_BUSY)
 190                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 191
 192         return stat;
 193 }
 194
 195 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 196                    unsigned int write, unsigned int len)
 197 {
 198         ide_hwif_t *hwif = drive->hwif;
 199         struct scatterlist *sg = hwif->sg_table;
 200         struct scatterlist *cursg = cmd->cursg;
 201         struct page *page;
 202         unsigned long flags;
 203         unsigned int offset;
 204         u8 *buf;
 205
 206         cursg = cmd->cursg;
 207         if (cursg == NULL)
 208                 cursg = cmd->cursg = sg;
 209
 210         while (len) {
 211                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 212
 213                 if (nr_bytes > PAGE_SIZE)
 214                         nr_bytes = PAGE_SIZE;
 215
 216                 page = sg_page(cursg);
 217                 offset = cursg->offset + cmd->cursg_ofs;
 218
 219                 /* get the current page and offset */
 220                 page = nth_page(page, (offset >> PAGE_SHIFT));
 221                 offset %= PAGE_SIZE;
 222
 223                 if (PageHighMem(page))
 224                         local_irq_save(flags);
 225
 226                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 227
 228                 cmd->nleft -= nr_bytes;
 229                 cmd->cursg_ofs += nr_bytes;
 230
 231                 if (cmd->cursg_ofs == cursg->length) {
 232                         cursg = cmd->cursg = sg_next(cmd->cursg);
 233                         cmd->cursg_ofs = 0;
 234                 }
 235
 236                 /* do the actual data transfer */
 237                 if (write)
 238                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 239                 else
 240                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 241
 242                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 243
 244                 if (PageHighMem(page))
 245                         local_irq_restore(flags);
 246
 247                 len -= nr_bytes;
 248         }
 249 }
 250 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 251
 252 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 253                               unsigned int write)
 254 {
 255         unsigned int nr_bytes;
 256
 257         u8 saved_io_32bit = drive->io_32bit;
 258
 259         if (cmd->tf_flags & IDE_TFLAG_FS)
 260                 cmd->rq->errors = 0;
 261
 262         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 263                 drive->io_32bit = 0;
 264
 265         touch_softlockup_watchdog();
 266
 267         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 268                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 269         else
 270                 nr_bytes = SECTOR_SIZE;
 271
 272         ide_pio_bytes(drive, cmd, write, nr_bytes);
 273
 274         drive->io_32bit = saved_io_32bit;
 275 }
 276
 277 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 278 {
 279         if (cmd->tf_flags & IDE_TFLAG_FS) {
 280                 int nr_bytes = cmd->nbytes - cmd->nleft;
 281
 282                 if (cmd->protocol == ATA_PROT_PIO &&
 283                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 284                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 285                                 nr_bytes -= drive->mult_count << 9;
 286                         else
 287                                 nr_bytes -= SECTOR_SIZE;
 288                 }
 289
 290                 if (nr_bytes > 0)
 291                         ide_complete_rq(drive, 0, nr_bytes);
 292         }
 293 }
 294
 295 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 296 {
 297         struct request *rq = drive->hwif->rq;
 298         u8 err = ide_read_error(drive);
 299
 300         ide_complete_cmd(drive, cmd, stat, err);
 301         rq->errors = err;
 302         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 303 }
 304
 305 /*
 306  * Handler for command with PIO data phase.
 307  */
 308 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 309 {
 310         ide_hwif_t *hwif = drive->hwif;
 311         struct ide_cmd *cmd = &drive->hwif->cmd;
 312         u8 stat = hwif->tp_ops->read_status(hwif);
 313         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 314
 315         if (write == 0) {
 316                 /* Error? */
 317                 if (stat & ATA_ERR)
 318                         goto out_err;
 319
 320                 /* Didn't want any data? Odd. */
 321                 if ((stat & ATA_DRQ) == 0) {
 322                         /* Command all done? */
 323                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 324                                 goto out_end;
 325
 326                         /* Assume it was a spurious irq */
 327                         goto out_wait;
 328                 }
 329         } else {
 330                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 331                         goto out_err;
 332
 333                 /* Deal with unexpected ATA data phase. */
 334                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 335                         goto out_err;
 336         }
 337
 338         if (write && cmd->nleft == 0)
 339                 goto out_end;
 340
 341         /* Still data left to transfer. */
 342         ide_pio_datablock(drive, cmd, write);
 343
 344         /* Are we done? Check status and finish transfer. */
 345         if (write == 0 && cmd->nleft == 0) {
 346                 stat = wait_drive_not_busy(drive);
 347                 if (!OK_STAT(stat, 0, BAD_STAT))
 348                         goto out_err;
 349
 350                 goto out_end;
 351         }
 352 out_wait:
 353         /* Still data left to transfer. */
 354         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 355         return ide_started;
 356 out_end:
 357         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 358                 ide_finish_cmd(drive, cmd, stat);
 359         else
 360                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
 361         return ide_stopped;
 362 out_err:
 363         ide_error_cmd(drive, cmd);
 364         return ide_error(drive, __func__, stat);
 365 }
 366
 367 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 368                                          struct ide_cmd *cmd)
 369 {
 370         ide_startstop_t startstop;
 371
 372         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 373                           drive->bad_wstat, WAIT_DRQ)) {
 374                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 375                         drive->name,
 376                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 377                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 378                 return startstop;
 379         }
 380
 381         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 382                 local_irq_disable();
 383
 384         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 385
 386         ide_pio_datablock(drive, cmd, 1);
 387
 388         return ide_started;
 389 }
 390
 391 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 392                      u16 nsect)
 393 {
 394         struct request *rq;
 395         int error;
 396
 397         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 398         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 399         rq->buffer = buf;
 400
 401         /*
 402          * (ks) We transfer currently only whole sectors.
 403          * This is suffient for now.  But, it would be great,
 404          * if we would find a solution to transfer any size.
 405          * To support special commands like READ LONG.
 406          */
 407         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 408         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 409
 410         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 411                 rq->cmd_flags |= REQ_RW;
 412
 413         rq->special = cmd;
 414         cmd->rq = rq;
 415
 416         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 417         blk_put_request(rq);
 418
 419         return error;
 420 }
 421
 422 EXPORT_SYMBOL(ide_raw_taskfile);
 423
 424 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 425 {
 426         cmd->protocol = ATA_PROT_NODATA;
 427
 428         return ide_raw_taskfile(drive, cmd, NULL, 0);
 429 }
 430 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 431
 432 #ifdef CONFIG_IDE_TASK_IOCTL
 433 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 434 {
 435         ide_task_request_t      *req_task;
 436         struct ide_cmd          cmd;
 437         u8 *outbuf              = NULL;
 438         u8 *inbuf               = NULL;
 439         u8 *data_buf            = NULL;
 440         int err                 = 0;
 441         int tasksize            = sizeof(struct ide_task_request_s);
 442         unsigned int taskin     = 0;
 443         unsigned int taskout    = 0;
 444         u16 nsect               = 0;
 445         char __user *buf = (char __user *)arg;
 446
 447 //      printk("IDE Taskfile ...\n");
 448
 449         req_task = kzalloc(tasksize, GFP_KERNEL);
 450         if (req_task == NULL) return -ENOMEM;
 451         if (copy_from_user(req_task, buf, tasksize)) {
 452                 kfree(req_task);
 453                 return -EFAULT;
 454         }
 455
 456         taskout = req_task->out_size;
 457         taskin  = req_task->in_size;
 458
 459         if (taskin > 65536 || taskout > 65536) {
 460                 err = -EINVAL;
 461                 goto abort;
 462         }
 463
 464         if (taskout) {
 465                 int outtotal = tasksize;
 466                 outbuf = kzalloc(taskout, GFP_KERNEL);
 467                 if (outbuf == NULL) {
 468                         err = -ENOMEM;
 469                         goto abort;
 470                 }
 471                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 472                         err = -EFAULT;
 473                         goto abort;
 474                 }
 475         }
 476
 477         if (taskin) {
 478                 int intotal = tasksize + taskout;
 479                 inbuf = kzalloc(taskin, GFP_KERNEL);
 480                 if (inbuf == NULL) {
 481                         err = -ENOMEM;
 482                         goto abort;
 483                 }
 484                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 485                         err = -EFAULT;
 486                         goto abort;
 487                 }
 488         }
 489
 490         memset(&cmd, 0, sizeof(cmd));
 491
 492         memcpy(&cmd.tf_array[0], req_task->hob_ports,
 493                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 494         memcpy(&cmd.tf_array[6], req_task->io_ports,
 495                HDIO_DRIVE_TASK_HDR_SIZE);
 496
 497         cmd.tf_flags   = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 498                          IDE_TFLAG_IN_TF;
 499
 500         if (drive->dev_flags & IDE_DFLAG_LBA48)
 501                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 502
 503         if (req_task->out_flags.all) {
 504                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 505
 506                 if (req_task->out_flags.b.data)
 507                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 508
 509                 if (req_task->out_flags.b.nsector_hob)
 510                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 511                 if (req_task->out_flags.b.sector_hob)
 512                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 513                 if (req_task->out_flags.b.lcyl_hob)
 514                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 515                 if (req_task->out_flags.b.hcyl_hob)
 516                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 517
 518                 if (req_task->out_flags.b.error_feature)
 519                         cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 520                 if (req_task->out_flags.b.nsector)
 521                         cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
 522                 if (req_task->out_flags.b.sector)
 523                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
 524                 if (req_task->out_flags.b.lcyl)
 525                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
 526                 if (req_task->out_flags.b.hcyl)
 527                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
 528         } else {
 529                 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
 530                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 531                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
 532         }
 533
 534         if (req_task->in_flags.b.data)
 535                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 536
 537         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 538                 /* fixup data phase if needed */
 539                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 540                     req_task->data_phase == TASKFILE_IN_DMA)
 541                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 542         }
 543
 544         cmd.protocol = ATA_PROT_DMA;
 545
 546         switch (req_task->data_phase) {
 547                 case TASKFILE_MULTI_OUT:
 548                         if (!drive->mult_count) {
 549                                 /* (hs): give up if multcount is not set */
 550                                 printk(KERN_ERR "%s: %s Multimode Write " \
 551                                         "multcount is not set\n",
 552                                         drive->name, __func__);
 553                                 err = -EPERM;
 554                                 goto abort;
 555                         }
 556                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 557                         /* fall through */
 558                 case TASKFILE_OUT:
 559                         cmd.protocol = ATA_PROT_PIO;
 560                         /* fall through */
 561                 case TASKFILE_OUT_DMAQ:
 562                 case TASKFILE_OUT_DMA:
 563                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 564                         nsect = taskout / SECTOR_SIZE;
 565                         data_buf = outbuf;
 566                         break;
 567                 case TASKFILE_MULTI_IN:
 568                         if (!drive->mult_count) {
 569                                 /* (hs): give up if multcount is not set */
 570                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 571                                         "multcount is not set\n",
 572                                         drive->name, __func__);
 573                                 err = -EPERM;
 574                                 goto abort;
 575                         }
 576                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 577                         /* fall through */
 578                 case TASKFILE_IN:
 579                         cmd.protocol = ATA_PROT_PIO;
 580                         /* fall through */
 581                 case TASKFILE_IN_DMAQ:
 582                 case TASKFILE_IN_DMA:
 583                         nsect = taskin / SECTOR_SIZE;
 584                         data_buf = inbuf;
 585                         break;
 586                 case TASKFILE_NO_DATA:
 587                         cmd.protocol = ATA_PROT_NODATA;
 588                         break;
 589                 default:
 590                         err = -EFAULT;
 591                         goto abort;
 592         }
 593
 594         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 595                 nsect = 0;
 596         else if (!nsect) {
 597                 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
 598
 599                 if (!nsect) {
 600                         printk(KERN_ERR "%s: in/out command without data\n",
 601                                         drive->name);
 602                         err = -EFAULT;
 603                         goto abort;
 604                 }
 605         }
 606
 607         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 608
 609         memcpy(req_task->hob_ports, &cmd.tf_array[0],
 610                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 611         memcpy(req_task->io_ports, &cmd.tf_array[6],
 612                HDIO_DRIVE_TASK_HDR_SIZE);
 613
 614         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 615             req_task->in_flags.all == 0) {
 616                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 617                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 618                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 619         }
 620
 621         if (copy_to_user(buf, req_task, tasksize)) {
 622                 err = -EFAULT;
 623                 goto abort;
 624         }
 625         if (taskout) {
 626                 int outtotal = tasksize;
 627                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 628                         err = -EFAULT;
 629                         goto abort;
 630                 }
 631         }
 632         if (taskin) {
 633                 int intotal = tasksize + taskout;
 634                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 635                         err = -EFAULT;
 636                         goto abort;
 637                 }
 638         }
 639 abort:
 640         kfree(req_task);
 641         kfree(outbuf);
 642         kfree(inbuf);
 643
 644 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 645
 646         return err;
 647 }
 648 #endif