git.oblomov.eu Git - 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         ide_task_t args;
  43
  44         memset(&args, 0, sizeof(ide_task_t));
  45         args.tf.nsect = 0x01;
  46         if (drive->media == ide_disk)
  47                 args.tf.command = WIN_IDENTIFY;
  48         else
  49                 args.tf.command = WIN_PIDENTIFY;
  50         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
  51         args.data_phase = TASKFILE_IN;
  52         return ide_raw_taskfile(drive, &args, buf, 1);
  53 }
  54
  55 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  56 static ide_startstop_t set_geometry_intr(ide_drive_t *);
  57 static ide_startstop_t recal_intr(ide_drive_t *);
  58 static ide_startstop_t set_multmode_intr(ide_drive_t *);
  59 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
  60 static ide_startstop_t task_in_intr(ide_drive_t *);
  61
  62 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
  63 {
  64         ide_hwif_t *hwif        = HWIF(drive);
  65         struct ide_taskfile *tf = &task->tf;
  66         ide_handler_t *handler = NULL;
  67         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  68         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  69
  70         if (task->data_phase == TASKFILE_MULTI_IN ||
  71             task->data_phase == TASKFILE_MULTI_OUT) {
  72                 if (!drive->mult_count) {
  73                         printk(KERN_ERR "%s: multimode not set!\n",
  74                                         drive->name);
  75                         return ide_stopped;
  76                 }
  77         }
  78
  79         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  80                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
  81
  82         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  83                 ide_tf_dump(drive->name, tf);
  84                 tp_ops->set_irq(hwif, 1);
  85                 SELECT_MASK(drive, 0);
  86                 tp_ops->tf_load(drive, task);
  87         }
  88
  89         switch (task->data_phase) {
  90         case TASKFILE_MULTI_OUT:
  91         case TASKFILE_OUT:
  92                 tp_ops->exec_command(hwif, tf->command);
  93                 ndelay(400);    /* FIXME */
  94                 return pre_task_out_intr(drive, task->rq);
  95         case TASKFILE_MULTI_IN:
  96         case TASKFILE_IN:
  97                 handler = task_in_intr;
  98                 /* fall-through */
  99         case TASKFILE_NO_DATA:
 100                 if (handler == NULL)
 101                         handler = task_no_data_intr;
 102                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 103                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 104                         switch (tf->command) {
 105                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 106                         case WIN_RESTORE: handler = recal_intr;         break;
 107                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 108                         }
 109                 }
 110                 ide_execute_command(drive, tf->command, handler,
 111                                     WAIT_WORSTCASE, NULL);
 112                 return ide_started;
 113         default:
 114                 if (drive->using_dma == 0 || dma_ops->dma_setup(drive))
 115                         return ide_stopped;
 116                 dma_ops->dma_exec_cmd(drive, tf->command);
 117                 dma_ops->dma_start(drive);
 118                 return ide_started;
 119         }
 120 }
 121 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 122
 123 /*
 124  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 125  */
 126 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 127 {
 128         ide_hwif_t *hwif = drive->hwif;
 129         u8 stat;
 130
 131         local_irq_enable_in_hardirq();
 132         stat = hwif->tp_ops->read_status(hwif);
 133
 134         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 135                 drive->mult_count = drive->mult_req;
 136         else {
 137                 drive->mult_req = drive->mult_count = 0;
 138                 drive->special.b.recalibrate = 1;
 139                 (void) ide_dump_status(drive, "set_multmode", stat);
 140         }
 141         return ide_stopped;
 142 }
 143
 144 /*
 145  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 146  */
 147 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 148 {
 149         ide_hwif_t *hwif = drive->hwif;
 150         int retries = 5;
 151         u8 stat;
 152
 153         local_irq_enable_in_hardirq();
 154
 155         while (1) {
 156                 stat = hwif->tp_ops->read_status(hwif);
 157                 if ((stat & BUSY_STAT) == 0 || retries-- == 0)
 158                         break;
 159                 udelay(10);
 160         };
 161
 162         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 163                 return ide_stopped;
 164
 165         if (stat & (ERR_STAT|DRQ_STAT))
 166                 return ide_error(drive, "set_geometry_intr", stat);
 167
 168         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 169         return ide_started;
 170 }
 171
 172 /*
 173  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 174  */
 175 static ide_startstop_t recal_intr(ide_drive_t *drive)
 176 {
 177         ide_hwif_t *hwif = drive->hwif;
 178         u8 stat;
 179
 180         local_irq_enable_in_hardirq();
 181         stat = hwif->tp_ops->read_status(hwif);
 182
 183         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 184                 return ide_error(drive, "recal_intr", stat);
 185         return ide_stopped;
 186 }
 187
 188 /*
 189  * Handler for commands without a data phase
 190  */
 191 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 192 {
 193         ide_hwif_t *hwif = drive->hwif;
 194         ide_task_t *args = hwif->hwgroup->rq->special;
 195         u8 stat;
 196
 197         local_irq_enable_in_hardirq();
 198         stat = hwif->tp_ops->read_status(hwif);
 199
 200         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 201                 return ide_error(drive, "task_no_data_intr", stat);
 202                 /* calls ide_end_drive_cmd */
 203
 204         if (args)
 205                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 206
 207         return ide_stopped;
 208 }
 209
 210 static u8 wait_drive_not_busy(ide_drive_t *drive)
 211 {
 212         ide_hwif_t *hwif = drive->hwif;
 213         int retries;
 214         u8 stat;
 215
 216         /*
 217          * Last sector was transfered, wait until device is ready.  This can
 218          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 219          */
 220         for (retries = 0; retries < 1000; retries++) {
 221                 stat = hwif->tp_ops->read_status(hwif);
 222
 223                 if (stat & BUSY_STAT)
 224                         udelay(10);
 225                 else
 226                         break;
 227         }
 228
 229         if (stat & BUSY_STAT)
 230                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 231
 232         return stat;
 233 }
 234
 235 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 236                            unsigned int write)
 237 {
 238         ide_hwif_t *hwif = drive->hwif;
 239         struct scatterlist *sg = hwif->sg_table;
 240         struct scatterlist *cursg = hwif->cursg;
 241         struct page *page;
 242 #ifdef CONFIG_HIGHMEM
 243         unsigned long flags;
 244 #endif
 245         unsigned int offset;
 246         u8 *buf;
 247
 248         cursg = hwif->cursg;
 249         if (!cursg) {
 250                 cursg = sg;
 251                 hwif->cursg = sg;
 252         }
 253
 254         page = sg_page(cursg);
 255         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 256
 257         /* get the current page and offset */
 258         page = nth_page(page, (offset >> PAGE_SHIFT));
 259         offset %= PAGE_SIZE;
 260
 261 #ifdef CONFIG_HIGHMEM
 262         local_irq_save(flags);
 263 #endif
 264         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 265
 266         hwif->nleft--;
 267         hwif->cursg_ofs++;
 268
 269         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 270                 hwif->cursg = sg_next(hwif->cursg);
 271                 hwif->cursg_ofs = 0;
 272         }
 273
 274         /* do the actual data transfer */
 275         if (write)
 276                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 277         else
 278                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 279
 280         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 281 #ifdef CONFIG_HIGHMEM
 282         local_irq_restore(flags);
 283 #endif
 284 }
 285
 286 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 287                           unsigned int write)
 288 {
 289         unsigned int nsect;
 290
 291         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 292         while (nsect--)
 293                 ide_pio_sector(drive, rq, write);
 294 }
 295
 296 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 297                                      unsigned int write)
 298 {
 299         u8 saved_io_32bit = drive->io_32bit;
 300
 301         if (rq->bio)    /* fs request */
 302                 rq->errors = 0;
 303
 304         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 305                 ide_task_t *task = rq->special;
 306
 307                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 308                         drive->io_32bit = 0;
 309         }
 310
 311         touch_softlockup_watchdog();
 312
 313         switch (drive->hwif->data_phase) {
 314         case TASKFILE_MULTI_IN:
 315         case TASKFILE_MULTI_OUT:
 316                 ide_pio_multi(drive, rq, write);
 317                 break;
 318         default:
 319                 ide_pio_sector(drive, rq, write);
 320                 break;
 321         }
 322
 323         drive->io_32bit = saved_io_32bit;
 324 }
 325
 326 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 327                                   const char *s, u8 stat)
 328 {
 329         if (rq->bio) {
 330                 ide_hwif_t *hwif = drive->hwif;
 331                 int sectors = hwif->nsect - hwif->nleft;
 332
 333                 switch (hwif->data_phase) {
 334                 case TASKFILE_IN:
 335                         if (hwif->nleft)
 336                                 break;
 337                         /* fall through */
 338                 case TASKFILE_OUT:
 339                         sectors--;
 340                         break;
 341                 case TASKFILE_MULTI_IN:
 342                         if (hwif->nleft)
 343                                 break;
 344                         /* fall through */
 345                 case TASKFILE_MULTI_OUT:
 346                         sectors -= drive->mult_count;
 347                 default:
 348                         break;
 349                 }
 350
 351                 if (sectors > 0) {
 352                         ide_driver_t *drv;
 353
 354                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 355                         drv->end_request(drive, 1, sectors);
 356                 }
 357         }
 358         return ide_error(drive, s, stat);
 359 }
 360
 361 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 362 {
 363         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 364                 u8 err = ide_read_error(drive);
 365
 366                 ide_end_drive_cmd(drive, stat, err);
 367                 return;
 368         }
 369
 370         if (rq->rq_disk) {
 371                 ide_driver_t *drv;
 372
 373                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 374                 drv->end_request(drive, 1, rq->nr_sectors);
 375         } else
 376                 ide_end_request(drive, 1, rq->nr_sectors);
 377 }
 378
 379 /*
 380  * We got an interrupt on a task_in case, but no errors and no DRQ.
 381  *
 382  * It might be a spurious irq (shared irq), but it might be a
 383  * command that had no output.
 384  */
 385 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 386 {
 387         /* Command all done? */
 388         if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
 389                 task_end_request(drive, rq, stat);
 390                 return ide_stopped;
 391         }
 392
 393         /* Assume it was a spurious irq */
 394         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 395         return ide_started;
 396 }
 397
 398 /*
 399  * Handler for command with PIO data-in phase (Read/Read Multiple).
 400  */
 401 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 402 {
 403         ide_hwif_t *hwif = drive->hwif;
 404         struct request *rq = hwif->hwgroup->rq;
 405         u8 stat = hwif->tp_ops->read_status(hwif);
 406
 407         /* Error? */
 408         if (stat & ERR_STAT)
 409                 return task_error(drive, rq, __func__, stat);
 410
 411         /* Didn't want any data? Odd. */
 412         if (!(stat & DRQ_STAT))
 413                 return task_in_unexpected(drive, rq, stat);
 414
 415         ide_pio_datablock(drive, rq, 0);
 416
 417         /* Are we done? Check status and finish transfer. */
 418         if (!hwif->nleft) {
 419                 stat = wait_drive_not_busy(drive);
 420                 if (!OK_STAT(stat, 0, BAD_STAT))
 421                         return task_error(drive, rq, __func__, stat);
 422                 task_end_request(drive, rq, stat);
 423                 return ide_stopped;
 424         }
 425
 426         /* Still data left to transfer. */
 427         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 428
 429         return ide_started;
 430 }
 431
 432 /*
 433  * Handler for command with PIO data-out phase (Write/Write Multiple).
 434  */
 435 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 436 {
 437         ide_hwif_t *hwif = drive->hwif;
 438         struct request *rq = HWGROUP(drive)->rq;
 439         u8 stat = hwif->tp_ops->read_status(hwif);
 440
 441         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 442                 return task_error(drive, rq, __func__, stat);
 443
 444         /* Deal with unexpected ATA data phase. */
 445         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 446                 return task_error(drive, rq, __func__, stat);
 447
 448         if (!hwif->nleft) {
 449                 task_end_request(drive, rq, stat);
 450                 return ide_stopped;
 451         }
 452
 453         /* Still data left to transfer. */
 454         ide_pio_datablock(drive, rq, 1);
 455         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 456
 457         return ide_started;
 458 }
 459
 460 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 461 {
 462         ide_startstop_t startstop;
 463
 464         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 465                           drive->bad_wstat, WAIT_DRQ)) {
 466                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 467                                 drive->name,
 468                                 drive->hwif->data_phase ? "MULT" : "",
 469                                 drive->addressing ? "_EXT" : "");
 470                 return startstop;
 471         }
 472
 473         if (!drive->unmask)
 474                 local_irq_disable();
 475
 476         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 477         ide_pio_datablock(drive, rq, 1);
 478
 479         return ide_started;
 480 }
 481
 482 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 483 {
 484         struct request *rq;
 485         int error;
 486
 487         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 488         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 489         rq->buffer = buf;
 490
 491         /*
 492          * (ks) We transfer currently only whole sectors.
 493          * This is suffient for now.  But, it would be great,
 494          * if we would find a solution to transfer any size.
 495          * To support special commands like READ LONG.
 496          */
 497         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 498         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 499
 500         if (task->tf_flags & IDE_TFLAG_WRITE)
 501                 rq->cmd_flags |= REQ_RW;
 502
 503         rq->special = task;
 504         task->rq = rq;
 505
 506         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 507         blk_put_request(rq);
 508
 509         return error;
 510 }
 511
 512 EXPORT_SYMBOL(ide_raw_taskfile);
 513
 514 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 515 {
 516         task->data_phase = TASKFILE_NO_DATA;
 517
 518         return ide_raw_taskfile(drive, task, NULL, 0);
 519 }
 520 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 521
 522 #ifdef CONFIG_IDE_TASK_IOCTL
 523 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 524 {
 525         ide_task_request_t      *req_task;
 526         ide_task_t              args;
 527         u8 *outbuf              = NULL;
 528         u8 *inbuf               = NULL;
 529         u8 *data_buf            = NULL;
 530         int err                 = 0;
 531         int tasksize            = sizeof(struct ide_task_request_s);
 532         unsigned int taskin     = 0;
 533         unsigned int taskout    = 0;
 534         u16 nsect               = 0;
 535         char __user *buf = (char __user *)arg;
 536
 537 //      printk("IDE Taskfile ...\n");
 538
 539         req_task = kzalloc(tasksize, GFP_KERNEL);
 540         if (req_task == NULL) return -ENOMEM;
 541         if (copy_from_user(req_task, buf, tasksize)) {
 542                 kfree(req_task);
 543                 return -EFAULT;
 544         }
 545
 546         taskout = req_task->out_size;
 547         taskin  = req_task->in_size;
 548
 549         if (taskin > 65536 || taskout > 65536) {
 550                 err = -EINVAL;
 551                 goto abort;
 552         }
 553
 554         if (taskout) {
 555                 int outtotal = tasksize;
 556                 outbuf = kzalloc(taskout, GFP_KERNEL);
 557                 if (outbuf == NULL) {
 558                         err = -ENOMEM;
 559                         goto abort;
 560                 }
 561                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 562                         err = -EFAULT;
 563                         goto abort;
 564                 }
 565         }
 566
 567         if (taskin) {
 568                 int intotal = tasksize + taskout;
 569                 inbuf = kzalloc(taskin, GFP_KERNEL);
 570                 if (inbuf == NULL) {
 571                         err = -ENOMEM;
 572                         goto abort;
 573                 }
 574                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 575                         err = -EFAULT;
 576                         goto abort;
 577                 }
 578         }
 579
 580         memset(&args, 0, sizeof(ide_task_t));
 581
 582         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 583         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 584
 585         args.data_phase = req_task->data_phase;
 586
 587         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 588                         IDE_TFLAG_IN_TF;
 589         if (drive->addressing == 1)
 590                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 591
 592         if (req_task->out_flags.all) {
 593                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 594
 595                 if (req_task->out_flags.b.data)
 596                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 597
 598                 if (req_task->out_flags.b.nsector_hob)
 599                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 600                 if (req_task->out_flags.b.sector_hob)
 601                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 602                 if (req_task->out_flags.b.lcyl_hob)
 603                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 604                 if (req_task->out_flags.b.hcyl_hob)
 605                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 606
 607                 if (req_task->out_flags.b.error_feature)
 608                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 609                 if (req_task->out_flags.b.nsector)
 610                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 611                 if (req_task->out_flags.b.sector)
 612                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 613                 if (req_task->out_flags.b.lcyl)
 614                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 615                 if (req_task->out_flags.b.hcyl)
 616                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 617         } else {
 618                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 619                 if (args.tf_flags & IDE_TFLAG_LBA48)
 620                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 621         }
 622
 623         if (req_task->in_flags.b.data)
 624                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 625
 626         switch(req_task->data_phase) {
 627                 case TASKFILE_MULTI_OUT:
 628                         if (!drive->mult_count) {
 629                                 /* (hs): give up if multcount is not set */
 630                                 printk(KERN_ERR "%s: %s Multimode Write " \
 631                                         "multcount is not set\n",
 632                                         drive->name, __func__);
 633                                 err = -EPERM;
 634                                 goto abort;
 635                         }
 636                         /* fall through */
 637                 case TASKFILE_OUT:
 638                         /* fall through */
 639                 case TASKFILE_OUT_DMAQ:
 640                 case TASKFILE_OUT_DMA:
 641                         nsect = taskout / SECTOR_SIZE;
 642                         data_buf = outbuf;
 643                         break;
 644                 case TASKFILE_MULTI_IN:
 645                         if (!drive->mult_count) {
 646                                 /* (hs): give up if multcount is not set */
 647                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 648                                         "multcount is not set\n",
 649                                         drive->name, __func__);
 650                                 err = -EPERM;
 651                                 goto abort;
 652                         }
 653                         /* fall through */
 654                 case TASKFILE_IN:
 655                         /* fall through */
 656                 case TASKFILE_IN_DMAQ:
 657                 case TASKFILE_IN_DMA:
 658                         nsect = taskin / SECTOR_SIZE;
 659                         data_buf = inbuf;
 660                         break;
 661                 case TASKFILE_NO_DATA:
 662                         break;
 663                 default:
 664                         err = -EFAULT;
 665                         goto abort;
 666         }
 667
 668         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 669                 nsect = 0;
 670         else if (!nsect) {
 671                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 672
 673                 if (!nsect) {
 674                         printk(KERN_ERR "%s: in/out command without data\n",
 675                                         drive->name);
 676                         err = -EFAULT;
 677                         goto abort;
 678                 }
 679         }
 680
 681         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 682                 args.tf_flags |= IDE_TFLAG_WRITE;
 683
 684         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 685
 686         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 687         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 688
 689         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 690             req_task->in_flags.all == 0) {
 691                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 692                 if (drive->addressing == 1)
 693                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 694         }
 695
 696         if (copy_to_user(buf, req_task, tasksize)) {
 697                 err = -EFAULT;
 698                 goto abort;
 699         }
 700         if (taskout) {
 701                 int outtotal = tasksize;
 702                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 703                         err = -EFAULT;
 704                         goto abort;
 705                 }
 706         }
 707         if (taskin) {
 708                 int intotal = tasksize + taskout;
 709                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 710                         err = -EFAULT;
 711                         goto abort;
 712                 }
 713         }
 714 abort:
 715         kfree(req_task);
 716         kfree(outbuf);
 717         kfree(inbuf);
 718
 719 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 720
 721         return err;
 722 }
 723 #endif
 724
 725 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 726 {
 727         u8 *buf = NULL;
 728         int bufsize = 0, err = 0;
 729         u8 args[4], xfer_rate = 0;
 730         ide_task_t tfargs;
 731         struct ide_taskfile *tf = &tfargs.tf;
 732         struct hd_driveid *id = drive->id;
 733
 734         if (NULL == (void *) arg) {
 735                 struct request *rq;
 736
 737                 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 738                 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 739                 err = blk_execute_rq(drive->queue, NULL, rq, 0);
 740                 blk_put_request(rq);
 741
 742                 return err;
 743         }
 744
 745         if (copy_from_user(args, (void __user *)arg, 4))
 746                 return -EFAULT;
 747
 748         memset(&tfargs, 0, sizeof(ide_task_t));
 749         tf->feature = args[2];
 750         if (args[0] == WIN_SMART) {
 751                 tf->nsect = args[3];
 752                 tf->lbal  = args[1];
 753                 tf->lbam  = 0x4f;
 754                 tf->lbah  = 0xc2;
 755                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 756         } else {
 757                 tf->nsect = args[1];
 758                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 759                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 760         }
 761         tf->command = args[0];
 762         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 763
 764         if (args[3]) {
 765                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 766                 bufsize = SECTOR_WORDS * 4 * args[3];
 767                 buf = kzalloc(bufsize, GFP_KERNEL);
 768                 if (buf == NULL)
 769                         return -ENOMEM;
 770         }
 771
 772         if (tf->command == WIN_SETFEATURES &&
 773             tf->feature == SETFEATURES_XFER &&
 774             tf->nsect >= XFER_SW_DMA_0 &&
 775             (id->dma_ultra || id->dma_mword || id->dma_1word)) {
 776                 xfer_rate = args[1];
 777                 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 778                         printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 779                                             "be set\n", drive->name);
 780                         goto abort;
 781                 }
 782         }
 783
 784         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 785
 786         args[0] = tf->status;
 787         args[1] = tf->error;
 788         args[2] = tf->nsect;
 789
 790         if (!err && xfer_rate) {
 791                 /* active-retuning-calls future */
 792                 ide_set_xfer_rate(drive, xfer_rate);
 793                 ide_driveid_update(drive);
 794         }
 795 abort:
 796         if (copy_to_user((void __user *)arg, &args, 4))
 797                 err = -EFAULT;
 798         if (buf) {
 799                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 800                         err = -EFAULT;
 801                 kfree(buf);
 802         }
 803         return err;
 804 }
 805
 806 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 807 {
 808         void __user *p = (void __user *)arg;
 809         int err = 0;
 810         u8 args[7];
 811         ide_task_t task;
 812
 813         if (copy_from_user(args, p, 7))
 814                 return -EFAULT;
 815
 816         memset(&task, 0, sizeof(task));
 817         memcpy(&task.tf_array[7], &args[1], 6);
 818         task.tf.command = args[0];
 819         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 820
 821         err = ide_no_data_taskfile(drive, &task);
 822
 823         args[0] = task.tf.command;
 824         memcpy(&args[1], &task.tf_array[7], 6);
 825
 826         if (copy_to_user(p, args, 7))
 827                 err = -EFAULT;
 828
 829         return err;
 830 }