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_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  27 {
  28         ide_hwif_t *hwif = drive->hwif;
  29         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  30
  31         /* Be sure we're looking at the low order bytes */
  32         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  33
  34         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  35
  36         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  37                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  38
  39                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  40         }
  41 }
  42
  43 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
  44 {
  45 #ifdef DEBUG
  46         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  47                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  48                s, cmd->tf.feature, cmd->tf.nsect,
  49                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  50                cmd->tf.device, cmd->tf.command);
  51         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  52                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  53 #endif
  54 }
  55
  56 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  57 {
  58         struct ide_cmd cmd;
  59
  60         memset(&cmd, 0, sizeof(cmd));
  61         cmd.tf.nsect = 0x01;
  62         if (drive->media == ide_disk)
  63                 cmd.tf.command = ATA_CMD_ID_ATA;
  64         else
  65                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  66         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  67         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  68         cmd.protocol = ATA_PROT_PIO;
  69
  70         return ide_raw_taskfile(drive, &cmd, buf, 1);
  71 }
  72
  73 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  74 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  75 static ide_startstop_t task_pio_intr(ide_drive_t *);
  76
  77 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  78 {
  79         ide_hwif_t *hwif = drive->hwif;
  80         struct ide_cmd *cmd = &hwif->cmd;
  81         struct ide_taskfile *tf = &cmd->tf;
  82         ide_handler_t *handler = NULL;
  83         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  84         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  85
  86         if (orig_cmd->protocol == ATA_PROT_PIO &&
  87             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  88             drive->mult_count == 0) {
  89                 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
  90                 return ide_stopped;
  91         }
  92
  93         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  94                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  95
  96         memcpy(cmd, orig_cmd, sizeof(*cmd));
  97
  98         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  99                 ide_tf_dump(drive->name, cmd);
 100                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 101
 102                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
 103                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
 104
 105                         tp_ops->output_data(drive, cmd, data, 2);
 106                 }
 107
 108                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
 109                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
 110                                   0xE0 : 0xEF;
 111
 112                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
 113                                 cmd->tf.device &= HIHI;
 114                         cmd->tf.device |= drive->select;
 115                 }
 116
 117                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 118                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 119         }
 120
 121         switch (cmd->protocol) {
 122         case ATA_PROT_PIO:
 123                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 124                         tp_ops->exec_command(hwif, tf->command);
 125                         ndelay(400);    /* FIXME */
 126                         return pre_task_out_intr(drive, cmd);
 127                 }
 128                 handler = task_pio_intr;
 129                 /* fall-through */
 130         case ATA_PROT_NODATA:
 131                 if (handler == NULL)
 132                         handler = task_no_data_intr;
 133                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 134                 return ide_started;
 135         case ATA_PROT_DMA:
 136                 if (ide_dma_prepare(drive, cmd))
 137                         return ide_stopped;
 138                 hwif->expiry = dma_ops->dma_timer_expiry;
 139                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 140                 dma_ops->dma_start(drive);
 141         default:
 142                 return ide_started;
 143         }
 144 }
 145 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 146
 147 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 148 {
 149         ide_hwif_t *hwif = drive->hwif;
 150         struct ide_cmd *cmd = &hwif->cmd;
 151         struct ide_taskfile *tf = &cmd->tf;
 152         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 153         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 154         u8 stat;
 155
 156         local_irq_enable_in_hardirq();
 157
 158         while (1) {
 159                 stat = hwif->tp_ops->read_status(hwif);
 160                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 161                         break;
 162                 udelay(10);
 163         };
 164
 165         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 166                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 167                         drive->mult_req = drive->mult_count = 0;
 168                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
 169                         (void)ide_dump_status(drive, __func__, stat);
 170                         return ide_stopped;
 171                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 172                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 173                                 ide_set_handler(drive, &task_no_data_intr,
 174                                                 WAIT_WORSTCASE);
 175                                 return ide_started;
 176                         }
 177                 }
 178                 return ide_error(drive, "task_no_data_intr", stat);
 179         }
 180
 181         if (custom && tf->command == ATA_CMD_SET_MULTI)
 182                 drive->mult_count = drive->mult_req;
 183
 184         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 185             tf->command == ATA_CMD_CHK_POWER) {
 186                 struct request *rq = hwif->rq;
 187
 188                 if (blk_pm_request(rq))
 189                         ide_complete_pm_rq(drive, rq);
 190                 else
 191                         ide_finish_cmd(drive, cmd, stat);
 192         }
 193
 194         return ide_stopped;
 195 }
 196
 197 static u8 wait_drive_not_busy(ide_drive_t *drive)
 198 {
 199         ide_hwif_t *hwif = drive->hwif;
 200         int retries;
 201         u8 stat;
 202
 203         /*
 204          * Last sector was transfered, wait until device is ready.  This can
 205          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 206          */
 207         for (retries = 0; retries < 1000; retries++) {
 208                 stat = hwif->tp_ops->read_status(hwif);
 209
 210                 if (stat & ATA_BUSY)
 211                         udelay(10);
 212                 else
 213                         break;
 214         }
 215
 216         if (stat & ATA_BUSY)
 217                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 218
 219         return stat;
 220 }
 221
 222 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 223                    unsigned int write, unsigned int len)
 224 {
 225         ide_hwif_t *hwif = drive->hwif;
 226         struct scatterlist *sg = hwif->sg_table;
 227         struct scatterlist *cursg = cmd->cursg;
 228         struct page *page;
 229         unsigned long flags;
 230         unsigned int offset;
 231         u8 *buf;
 232
 233         cursg = cmd->cursg;
 234         if (cursg == NULL)
 235                 cursg = cmd->cursg = sg;
 236
 237         while (len) {
 238                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 239
 240                 if (nr_bytes > PAGE_SIZE)
 241                         nr_bytes = PAGE_SIZE;
 242
 243                 page = sg_page(cursg);
 244                 offset = cursg->offset + cmd->cursg_ofs;
 245
 246                 /* get the current page and offset */
 247                 page = nth_page(page, (offset >> PAGE_SHIFT));
 248                 offset %= PAGE_SIZE;
 249
 250                 if (PageHighMem(page))
 251                         local_irq_save(flags);
 252
 253                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 254
 255                 cmd->nleft -= nr_bytes;
 256                 cmd->cursg_ofs += nr_bytes;
 257
 258                 if (cmd->cursg_ofs == cursg->length) {
 259                         cursg = cmd->cursg = sg_next(cmd->cursg);
 260                         cmd->cursg_ofs = 0;
 261                 }
 262
 263                 /* do the actual data transfer */
 264                 if (write)
 265                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 266                 else
 267                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 268
 269                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 270
 271                 if (PageHighMem(page))
 272                         local_irq_restore(flags);
 273
 274                 len -= nr_bytes;
 275         }
 276 }
 277 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 278
 279 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 280                               unsigned int write)
 281 {
 282         unsigned int nr_bytes;
 283
 284         u8 saved_io_32bit = drive->io_32bit;
 285
 286         if (cmd->tf_flags & IDE_TFLAG_FS)
 287                 cmd->rq->errors = 0;
 288
 289         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 290                 drive->io_32bit = 0;
 291
 292         touch_softlockup_watchdog();
 293
 294         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 295                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 296         else
 297                 nr_bytes = SECTOR_SIZE;
 298
 299         ide_pio_bytes(drive, cmd, write, nr_bytes);
 300
 301         drive->io_32bit = saved_io_32bit;
 302 }
 303
 304 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 305 {
 306         if (cmd->tf_flags & IDE_TFLAG_FS) {
 307                 int nr_bytes = cmd->nbytes - cmd->nleft;
 308
 309                 if (cmd->protocol == ATA_PROT_PIO &&
 310                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 311                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 312                                 nr_bytes -= drive->mult_count << 9;
 313                         else
 314                                 nr_bytes -= SECTOR_SIZE;
 315                 }
 316
 317                 if (nr_bytes > 0)
 318                         ide_complete_rq(drive, 0, nr_bytes);
 319         }
 320 }
 321
 322 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 323 {
 324         struct request *rq = drive->hwif->rq;
 325         u8 err = ide_read_error(drive);
 326
 327         ide_complete_cmd(drive, cmd, stat, err);
 328         rq->errors = err;
 329         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 330 }
 331
 332 /*
 333  * Handler for command with PIO data phase.
 334  */
 335 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 336 {
 337         ide_hwif_t *hwif = drive->hwif;
 338         struct ide_cmd *cmd = &drive->hwif->cmd;
 339         u8 stat = hwif->tp_ops->read_status(hwif);
 340         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 341
 342         if (write == 0) {
 343                 /* Error? */
 344                 if (stat & ATA_ERR)
 345                         goto out_err;
 346
 347                 /* Didn't want any data? Odd. */
 348                 if ((stat & ATA_DRQ) == 0) {
 349                         /* Command all done? */
 350                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 351                                 goto out_end;
 352
 353                         /* Assume it was a spurious irq */
 354                         goto out_wait;
 355                 }
 356         } else {
 357                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 358                         goto out_err;
 359
 360                 /* Deal with unexpected ATA data phase. */
 361                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 362                         goto out_err;
 363         }
 364
 365         if (write && cmd->nleft == 0)
 366                 goto out_end;
 367
 368         /* Still data left to transfer. */
 369         ide_pio_datablock(drive, cmd, write);
 370
 371         /* Are we done? Check status and finish transfer. */
 372         if (write == 0 && cmd->nleft == 0) {
 373                 stat = wait_drive_not_busy(drive);
 374                 if (!OK_STAT(stat, 0, BAD_STAT))
 375                         goto out_err;
 376
 377                 goto out_end;
 378         }
 379 out_wait:
 380         /* Still data left to transfer. */
 381         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 382         return ide_started;
 383 out_end:
 384         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 385                 ide_finish_cmd(drive, cmd, stat);
 386         else
 387                 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
 388         return ide_stopped;
 389 out_err:
 390         ide_error_cmd(drive, cmd);
 391         return ide_error(drive, __func__, stat);
 392 }
 393
 394 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 395                                          struct ide_cmd *cmd)
 396 {
 397         ide_startstop_t startstop;
 398
 399         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 400                           drive->bad_wstat, WAIT_DRQ)) {
 401                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 402                         drive->name,
 403                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 404                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 405                 return startstop;
 406         }
 407
 408         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 409                 local_irq_disable();
 410
 411         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 412
 413         ide_pio_datablock(drive, cmd, 1);
 414
 415         return ide_started;
 416 }
 417
 418 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 419                      u16 nsect)
 420 {
 421         struct request *rq;
 422         int error;
 423
 424         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 425         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 426
 427         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 428                 rq->cmd_flags |= REQ_RW;
 429
 430         /*
 431          * (ks) We transfer currently only whole sectors.
 432          * This is suffient for now.  But, it would be great,
 433          * if we would find a solution to transfer any size.
 434          * To support special commands like READ LONG.
 435          */
 436         if (nsect) {
 437                 error = blk_rq_map_kern(drive->queue, rq, buf,
 438                                         nsect * SECTOR_SIZE, __GFP_WAIT);
 439                 if (error)
 440                         goto put_req;
 441         }
 442
 443         rq->special = cmd;
 444         cmd->rq = rq;
 445
 446         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 447
 448 put_req:
 449         blk_put_request(rq);
 450         return error;
 451 }
 452
 453 EXPORT_SYMBOL(ide_raw_taskfile);
 454
 455 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 456 {
 457         cmd->protocol = ATA_PROT_NODATA;
 458
 459         return ide_raw_taskfile(drive, cmd, NULL, 0);
 460 }
 461 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 462
 463 #ifdef CONFIG_IDE_TASK_IOCTL
 464 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 465 {
 466         ide_task_request_t      *req_task;
 467         struct ide_cmd          cmd;
 468         u8 *outbuf              = NULL;
 469         u8 *inbuf               = NULL;
 470         u8 *data_buf            = NULL;
 471         int err                 = 0;
 472         int tasksize            = sizeof(struct ide_task_request_s);
 473         unsigned int taskin     = 0;
 474         unsigned int taskout    = 0;
 475         u16 nsect               = 0;
 476         char __user *buf = (char __user *)arg;
 477
 478 //      printk("IDE Taskfile ...\n");
 479
 480         req_task = kzalloc(tasksize, GFP_KERNEL);
 481         if (req_task == NULL) return -ENOMEM;
 482         if (copy_from_user(req_task, buf, tasksize)) {
 483                 kfree(req_task);
 484                 return -EFAULT;
 485         }
 486
 487         taskout = req_task->out_size;
 488         taskin  = req_task->in_size;
 489
 490         if (taskin > 65536 || taskout > 65536) {
 491                 err = -EINVAL;
 492                 goto abort;
 493         }
 494
 495         if (taskout) {
 496                 int outtotal = tasksize;
 497                 outbuf = kzalloc(taskout, GFP_KERNEL);
 498                 if (outbuf == NULL) {
 499                         err = -ENOMEM;
 500                         goto abort;
 501                 }
 502                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 503                         err = -EFAULT;
 504                         goto abort;
 505                 }
 506         }
 507
 508         if (taskin) {
 509                 int intotal = tasksize + taskout;
 510                 inbuf = kzalloc(taskin, GFP_KERNEL);
 511                 if (inbuf == NULL) {
 512                         err = -ENOMEM;
 513                         goto abort;
 514                 }
 515                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 516                         err = -EFAULT;
 517                         goto abort;
 518                 }
 519         }
 520
 521         memset(&cmd, 0, sizeof(cmd));
 522
 523         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 524         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 525
 526         cmd.valid.out.tf = IDE_VALID_DEVICE;
 527         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 528         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 529
 530         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 531                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 532                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 533         }
 534
 535         if (req_task->out_flags.all) {
 536                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 537
 538                 if (req_task->out_flags.b.data)
 539                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 540
 541                 if (req_task->out_flags.b.nsector_hob)
 542                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 543                 if (req_task->out_flags.b.sector_hob)
 544                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 545                 if (req_task->out_flags.b.lcyl_hob)
 546                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 547                 if (req_task->out_flags.b.hcyl_hob)
 548                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 549
 550                 if (req_task->out_flags.b.error_feature)
 551                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 552                 if (req_task->out_flags.b.nsector)
 553                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 554                 if (req_task->out_flags.b.sector)
 555                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 556                 if (req_task->out_flags.b.lcyl)
 557                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 558                 if (req_task->out_flags.b.hcyl)
 559                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 560         } else {
 561                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 562                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 563                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 564         }
 565
 566         if (req_task->in_flags.b.data)
 567                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 568
 569         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 570                 /* fixup data phase if needed */
 571                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 572                     req_task->data_phase == TASKFILE_IN_DMA)
 573                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 574         }
 575
 576         cmd.protocol = ATA_PROT_DMA;
 577
 578         switch (req_task->data_phase) {
 579                 case TASKFILE_MULTI_OUT:
 580                         if (!drive->mult_count) {
 581                                 /* (hs): give up if multcount is not set */
 582                                 printk(KERN_ERR "%s: %s Multimode Write " \
 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_OUT:
 591                         cmd.protocol = ATA_PROT_PIO;
 592                         /* fall through */
 593                 case TASKFILE_OUT_DMAQ:
 594                 case TASKFILE_OUT_DMA:
 595                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 596                         nsect = taskout / SECTOR_SIZE;
 597                         data_buf = outbuf;
 598                         break;
 599                 case TASKFILE_MULTI_IN:
 600                         if (!drive->mult_count) {
 601                                 /* (hs): give up if multcount is not set */
 602                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 603                                         "multcount is not set\n",
 604                                         drive->name, __func__);
 605                                 err = -EPERM;
 606                                 goto abort;
 607                         }
 608                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 609                         /* fall through */
 610                 case TASKFILE_IN:
 611                         cmd.protocol = ATA_PROT_PIO;
 612                         /* fall through */
 613                 case TASKFILE_IN_DMAQ:
 614                 case TASKFILE_IN_DMA:
 615                         nsect = taskin / SECTOR_SIZE;
 616                         data_buf = inbuf;
 617                         break;
 618                 case TASKFILE_NO_DATA:
 619                         cmd.protocol = ATA_PROT_NODATA;
 620                         break;
 621                 default:
 622                         err = -EFAULT;
 623                         goto abort;
 624         }
 625
 626         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 627                 nsect = 0;
 628         else if (!nsect) {
 629                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 630
 631                 if (!nsect) {
 632                         printk(KERN_ERR "%s: in/out command without data\n",
 633                                         drive->name);
 634                         err = -EFAULT;
 635                         goto abort;
 636                 }
 637         }
 638
 639         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 640
 641         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 642         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 643
 644         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 645             req_task->in_flags.all == 0) {
 646                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 647                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 648                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 649         }
 650
 651         if (copy_to_user(buf, req_task, tasksize)) {
 652                 err = -EFAULT;
 653                 goto abort;
 654         }
 655         if (taskout) {
 656                 int outtotal = tasksize;
 657                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 658                         err = -EFAULT;
 659                         goto abort;
 660                 }
 661         }
 662         if (taskin) {
 663                 int intotal = tasksize + taskout;
 664                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 665                         err = -EFAULT;
 666                         goto abort;
 667                 }
 668         }
 669 abort:
 670         kfree(req_task);
 671         kfree(outbuf);
 672         kfree(inbuf);
 673
 674 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 675
 676         return err;
 677 }
 678 #endif