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   1 /*
   2  * linux/drivers/ide/ide-taskfile.c     Version 0.38    March 05, 2003
   3  *
   4  *  Copyright (C) 2000-2002     Michael Cornwell <cornwell@acm.org>
   5  *  Copyright (C) 2000-2002     Andre Hedrick <andre@linux-ide.org>
   6  *  Copyright (C) 2001-2002     Klaus Smolin
   7  *                                      IBM Storage Technology Division
   8  *  Copyright (C) 2003-2004     Bartlomiej Zolnierkiewicz
   9  *
  10  *  The big the bad and the ugly.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/string.h>
  16 #include <linux/kernel.h>
  17 #include <linux/timer.h>
  18 #include <linux/mm.h>
  19 #include <linux/sched.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/major.h>
  22 #include <linux/errno.h>
  23 #include <linux/genhd.h>
  24 #include <linux/blkpg.h>
  25 #include <linux/slab.h>
  26 #include <linux/pci.h>
  27 #include <linux/delay.h>
  28 #include <linux/hdreg.h>
  29 #include <linux/ide.h>
  30 #include <linux/bitops.h>
  31 #include <linux/scatterlist.h>
  32
  33 #include <asm/byteorder.h>
  34 #include <asm/irq.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/io.h>
  37
  38 static void ata_bswap_data (void *buffer, int wcount)
  39 {
  40         u16 *p = buffer;
  41
  42         while (wcount--) {
  43                 *p = *p << 8 | *p >> 8; p++;
  44                 *p = *p << 8 | *p >> 8; p++;
  45         }
  46 }
  47
  48 static void taskfile_input_data(ide_drive_t *drive, void *buffer, u32 wcount)
  49 {
  50         HWIF(drive)->ata_input_data(drive, buffer, wcount);
  51         if (drive->bswap)
  52                 ata_bswap_data(buffer, wcount);
  53 }
  54
  55 static void taskfile_output_data(ide_drive_t *drive, void *buffer, u32 wcount)
  56 {
  57         if (drive->bswap) {
  58                 ata_bswap_data(buffer, wcount);
  59                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  60                 ata_bswap_data(buffer, wcount);
  61         } else {
  62                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  63         }
  64 }
  65
  66 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  67 {
  68         ide_hwif_t *hwif = drive->hwif;
  69         struct ide_taskfile *tf = &task->tf;
  70         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  71
  72         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  73                 HIHI = 0xFF;
  74
  75         if (IDE_CONTROL_REG)
  76                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
  77
  78         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  79                 SELECT_MASK(drive, 0);
  80
  81         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  82                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  83
  84         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  85                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  86         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  87                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  88         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  89                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  90         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  91                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  92         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  93                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  94
  95         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  96                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  97         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  98                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  99         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
 100                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
 101         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
 102                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
 103         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
 104                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
 105
 106         hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
 107 }
 108
 109 EXPORT_SYMBOL_GPL(ide_tf_load);
 110
 111 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
 112 {
 113         ide_task_t args;
 114
 115         memset(&args, 0, sizeof(ide_task_t));
 116         args.tf.nsect = 0x01;
 117         if (drive->media == ide_disk)
 118                 args.tf.command = WIN_IDENTIFY;
 119         else
 120                 args.tf.command = WIN_PIDENTIFY;
 121         args.command_type = IDE_DRIVE_TASK_IN;
 122         args.data_phase   = TASKFILE_IN;
 123         args.handler      = &task_in_intr;
 124         return ide_raw_taskfile(drive, &args, buf);
 125 }
 126
 127 static int inline task_dma_ok(ide_task_t *task)
 128 {
 129         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 130                 return 1;
 131
 132         switch (task->tf.command) {
 133                 case WIN_WRITEDMA_ONCE:
 134                 case WIN_WRITEDMA:
 135                 case WIN_WRITEDMA_EXT:
 136                 case WIN_READDMA_ONCE:
 137                 case WIN_READDMA:
 138                 case WIN_READDMA_EXT:
 139                 case WIN_IDENTIFY_DMA:
 140                         return 1;
 141         }
 142
 143         return 0;
 144 }
 145
 146 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 147 {
 148         ide_hwif_t *hwif        = HWIF(drive);
 149         struct ide_taskfile *tf = &task->tf;
 150
 151         ide_tf_load(drive, task);
 152
 153         if (task->handler != NULL) {
 154                 if (task->prehandler != NULL) {
 155                         hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 156                         ndelay(400);    /* FIXME */
 157                         return task->prehandler(drive, task->rq);
 158                 }
 159                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 160                 return ide_started;
 161         }
 162
 163         if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
 164                 hwif->dma_exec_cmd(drive, tf->command);
 165                 hwif->dma_start(drive);
 166                 return ide_started;
 167         }
 168
 169         return ide_stopped;
 170 }
 171
 172 /*
 173  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 174  */
 175 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 176 {
 177         ide_hwif_t *hwif = HWIF(drive);
 178         u8 stat;
 179
 180         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 181                 drive->mult_count = drive->mult_req;
 182         } else {
 183                 drive->mult_req = drive->mult_count = 0;
 184                 drive->special.b.recalibrate = 1;
 185                 (void) ide_dump_status(drive, "set_multmode", stat);
 186         }
 187         return ide_stopped;
 188 }
 189
 190 /*
 191  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 192  */
 193 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 194 {
 195         ide_hwif_t *hwif = HWIF(drive);
 196         int retries = 5;
 197         u8 stat;
 198
 199         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 200                 udelay(10);
 201
 202         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 203                 return ide_stopped;
 204
 205         if (stat & (ERR_STAT|DRQ_STAT))
 206                 return ide_error(drive, "set_geometry_intr", stat);
 207
 208         BUG_ON(HWGROUP(drive)->handler != NULL);
 209         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 210         return ide_started;
 211 }
 212
 213 /*
 214  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 215  */
 216 ide_startstop_t recal_intr (ide_drive_t *drive)
 217 {
 218         ide_hwif_t *hwif = HWIF(drive);
 219         u8 stat;
 220
 221         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 222                 return ide_error(drive, "recal_intr", stat);
 223         return ide_stopped;
 224 }
 225
 226 /*
 227  * Handler for commands without a data phase
 228  */
 229 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 230 {
 231         ide_task_t *args        = HWGROUP(drive)->rq->special;
 232         ide_hwif_t *hwif        = HWIF(drive);
 233         u8 stat;
 234
 235         local_irq_enable_in_hardirq();
 236         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 237                 return ide_error(drive, "task_no_data_intr", stat);
 238                 /* calls ide_end_drive_cmd */
 239         }
 240         if (args)
 241                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 242
 243         return ide_stopped;
 244 }
 245
 246 static u8 wait_drive_not_busy(ide_drive_t *drive)
 247 {
 248         ide_hwif_t *hwif = HWIF(drive);
 249         int retries;
 250         u8 stat;
 251
 252         /*
 253          * Last sector was transfered, wait until drive is ready.
 254          * This can take up to 10 usec, but we will wait max 1 ms
 255          * (drive_cmd_intr() waits that long).
 256          */
 257         for (retries = 0; retries < 100; retries++) {
 258                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 259                         udelay(10);
 260                 else
 261                         break;
 262         }
 263
 264         if (stat & BUSY_STAT)
 265                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 266
 267         return stat;
 268 }
 269
 270 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 271 {
 272         ide_hwif_t *hwif = drive->hwif;
 273         struct scatterlist *sg = hwif->sg_table;
 274         struct scatterlist *cursg = hwif->cursg;
 275         struct page *page;
 276 #ifdef CONFIG_HIGHMEM
 277         unsigned long flags;
 278 #endif
 279         unsigned int offset;
 280         u8 *buf;
 281
 282         cursg = hwif->cursg;
 283         if (!cursg) {
 284                 cursg = sg;
 285                 hwif->cursg = sg;
 286         }
 287
 288         page = sg_page(cursg);
 289         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 290
 291         /* get the current page and offset */
 292         page = nth_page(page, (offset >> PAGE_SHIFT));
 293         offset %= PAGE_SIZE;
 294
 295 #ifdef CONFIG_HIGHMEM
 296         local_irq_save(flags);
 297 #endif
 298         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 299
 300         hwif->nleft--;
 301         hwif->cursg_ofs++;
 302
 303         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 304                 hwif->cursg = sg_next(hwif->cursg);
 305                 hwif->cursg_ofs = 0;
 306         }
 307
 308         /* do the actual data transfer */
 309         if (write)
 310                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 311         else
 312                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 313
 314         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 315 #ifdef CONFIG_HIGHMEM
 316         local_irq_restore(flags);
 317 #endif
 318 }
 319
 320 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 321 {
 322         unsigned int nsect;
 323
 324         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 325         while (nsect--)
 326                 ide_pio_sector(drive, write);
 327 }
 328
 329 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 330                                      unsigned int write)
 331 {
 332         if (rq->bio)    /* fs request */
 333                 rq->errors = 0;
 334
 335         touch_softlockup_watchdog();
 336
 337         switch (drive->hwif->data_phase) {
 338         case TASKFILE_MULTI_IN:
 339         case TASKFILE_MULTI_OUT:
 340                 ide_pio_multi(drive, write);
 341                 break;
 342         default:
 343                 ide_pio_sector(drive, write);
 344                 break;
 345         }
 346 }
 347
 348 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 349                                   const char *s, u8 stat)
 350 {
 351         if (rq->bio) {
 352                 ide_hwif_t *hwif = drive->hwif;
 353                 int sectors = hwif->nsect - hwif->nleft;
 354
 355                 switch (hwif->data_phase) {
 356                 case TASKFILE_IN:
 357                         if (hwif->nleft)
 358                                 break;
 359                         /* fall through */
 360                 case TASKFILE_OUT:
 361                         sectors--;
 362                         break;
 363                 case TASKFILE_MULTI_IN:
 364                         if (hwif->nleft)
 365                                 break;
 366                         /* fall through */
 367                 case TASKFILE_MULTI_OUT:
 368                         sectors -= drive->mult_count;
 369                 default:
 370                         break;
 371                 }
 372
 373                 if (sectors > 0) {
 374                         ide_driver_t *drv;
 375
 376                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 377                         drv->end_request(drive, 1, sectors);
 378                 }
 379         }
 380         return ide_error(drive, s, stat);
 381 }
 382
 383 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 384 {
 385         HWIF(drive)->cursg = NULL;
 386
 387         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 388                 ide_task_t *task = rq->special;
 389
 390                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 391                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 392                         ide_end_drive_cmd(drive, stat, err);
 393                         return;
 394                 }
 395         }
 396
 397         if (rq->rq_disk) {
 398                 ide_driver_t *drv;
 399
 400                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 401                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 402         } else
 403                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 404 }
 405
 406 /*
 407  * Handler for command with PIO data-in phase (Read/Read Multiple).
 408  */
 409 ide_startstop_t task_in_intr (ide_drive_t *drive)
 410 {
 411         ide_hwif_t *hwif = drive->hwif;
 412         struct request *rq = HWGROUP(drive)->rq;
 413         u8 stat = hwif->INB(IDE_STATUS_REG);
 414
 415         /* new way for dealing with premature shared PCI interrupts */
 416         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 417                 if (stat & (ERR_STAT | DRQ_STAT))
 418                         return task_error(drive, rq, __FUNCTION__, stat);
 419                 /* No data yet, so wait for another IRQ. */
 420                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 421                 return ide_started;
 422         }
 423
 424         ide_pio_datablock(drive, rq, 0);
 425
 426         /* If it was the last datablock check status and finish transfer. */
 427         if (!hwif->nleft) {
 428                 stat = wait_drive_not_busy(drive);
 429                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 430                         return task_error(drive, rq, __FUNCTION__, stat);
 431                 task_end_request(drive, rq, stat);
 432                 return ide_stopped;
 433         }
 434
 435         /* Still data left to transfer. */
 436         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 437
 438         return ide_started;
 439 }
 440 EXPORT_SYMBOL(task_in_intr);
 441
 442 /*
 443  * Handler for command with PIO data-out phase (Write/Write Multiple).
 444  */
 445 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 446 {
 447         ide_hwif_t *hwif = drive->hwif;
 448         struct request *rq = HWGROUP(drive)->rq;
 449         u8 stat = hwif->INB(IDE_STATUS_REG);
 450
 451         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 452                 return task_error(drive, rq, __FUNCTION__, stat);
 453
 454         /* Deal with unexpected ATA data phase. */
 455         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 456                 return task_error(drive, rq, __FUNCTION__, stat);
 457
 458         if (!hwif->nleft) {
 459                 task_end_request(drive, rq, stat);
 460                 return ide_stopped;
 461         }
 462
 463         /* Still data left to transfer. */
 464         ide_pio_datablock(drive, rq, 1);
 465         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 466
 467         return ide_started;
 468 }
 469
 470 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 471 {
 472         ide_startstop_t startstop;
 473
 474         if (ide_wait_stat(&startstop, drive, DATA_READY,
 475                           drive->bad_wstat, WAIT_DRQ)) {
 476                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 477                                 drive->name,
 478                                 drive->hwif->data_phase ? "MULT" : "",
 479                                 drive->addressing ? "_EXT" : "");
 480                 return startstop;
 481         }
 482
 483         if (!drive->unmask)
 484                 local_irq_disable();
 485
 486         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 487         ide_pio_datablock(drive, rq, 1);
 488
 489         return ide_started;
 490 }
 491 EXPORT_SYMBOL(pre_task_out_intr);
 492
 493 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
 494 {
 495         struct request rq;
 496
 497         memset(&rq, 0, sizeof(rq));
 498         rq.ref_count = 1;
 499         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 500         rq.buffer = buf;
 501
 502         /*
 503          * (ks) We transfer currently only whole sectors.
 504          * This is suffient for now.  But, it would be great,
 505          * if we would find a solution to transfer any size.
 506          * To support special commands like READ LONG.
 507          */
 508         if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
 509                 if (data_size == 0)
 510                         rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect;
 511                 else
 512                         rq.nr_sectors = data_size / SECTOR_SIZE;
 513
 514                 if (!rq.nr_sectors) {
 515                         printk(KERN_ERR "%s: in/out command without data\n",
 516                                         drive->name);
 517                         return -EFAULT;
 518                 }
 519
 520                 rq.hard_nr_sectors = rq.nr_sectors;
 521                 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
 522
 523                 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
 524                         rq.cmd_flags |= REQ_RW;
 525         }
 526
 527         rq.special = args;
 528         args->rq = &rq;
 529         return ide_do_drive_cmd(drive, &rq, ide_wait);
 530 }
 531
 532 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 533 {
 534         return ide_diag_taskfile(drive, args, 0, buf);
 535 }
 536
 537 EXPORT_SYMBOL(ide_raw_taskfile);
 538
 539 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 540 {
 541         task->command_type = IDE_DRIVE_TASK_NO_DATA;
 542         task->data_phase   = TASKFILE_NO_DATA;
 543         task->handler      = task_no_data_intr;
 544
 545         return ide_raw_taskfile(drive, task, NULL);
 546 }
 547 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 548
 549 #ifdef CONFIG_IDE_TASK_IOCTL
 550 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 551 {
 552         ide_task_request_t      *req_task;
 553         ide_task_t              args;
 554         u8 *outbuf              = NULL;
 555         u8 *inbuf               = NULL;
 556         int err                 = 0;
 557         int tasksize            = sizeof(struct ide_task_request_s);
 558         unsigned int taskin     = 0;
 559         unsigned int taskout    = 0;
 560         u8 io_32bit             = drive->io_32bit;
 561         char __user *buf = (char __user *)arg;
 562
 563 //      printk("IDE Taskfile ...\n");
 564
 565         req_task = kzalloc(tasksize, GFP_KERNEL);
 566         if (req_task == NULL) return -ENOMEM;
 567         if (copy_from_user(req_task, buf, tasksize)) {
 568                 kfree(req_task);
 569                 return -EFAULT;
 570         }
 571
 572         taskout = req_task->out_size;
 573         taskin  = req_task->in_size;
 574
 575         if (taskin > 65536 || taskout > 65536) {
 576                 err = -EINVAL;
 577                 goto abort;
 578         }
 579
 580         if (taskout) {
 581                 int outtotal = tasksize;
 582                 outbuf = kzalloc(taskout, GFP_KERNEL);
 583                 if (outbuf == NULL) {
 584                         err = -ENOMEM;
 585                         goto abort;
 586                 }
 587                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 588                         err = -EFAULT;
 589                         goto abort;
 590                 }
 591         }
 592
 593         if (taskin) {
 594                 int intotal = tasksize + taskout;
 595                 inbuf = kzalloc(taskin, GFP_KERNEL);
 596                 if (inbuf == NULL) {
 597                         err = -ENOMEM;
 598                         goto abort;
 599                 }
 600                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 601                         err = -EFAULT;
 602                         goto abort;
 603                 }
 604         }
 605
 606         memset(&args, 0, sizeof(ide_task_t));
 607
 608         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 609         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 610         args.tf_in_flags  = req_task->in_flags;
 611         args.data_phase   = req_task->data_phase;
 612         args.command_type = req_task->req_cmd;
 613
 614         if (req_task->out_flags.all) {
 615                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 616
 617                 if (req_task->out_flags.b.data)
 618                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 619
 620                 if (req_task->out_flags.b.nsector_hob)
 621                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 622                 if (req_task->out_flags.b.sector_hob)
 623                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 624                 if (req_task->out_flags.b.lcyl_hob)
 625                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 626                 if (req_task->out_flags.b.hcyl_hob)
 627                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 628
 629                 if (req_task->out_flags.b.error_feature)
 630                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 631                 if (req_task->out_flags.b.nsector)
 632                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 633                 if (req_task->out_flags.b.sector)
 634                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 635                 if (req_task->out_flags.b.lcyl)
 636                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 637                 if (req_task->out_flags.b.hcyl)
 638                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 639         }
 640
 641         drive->io_32bit = 0;
 642         switch(req_task->data_phase) {
 643                 case TASKFILE_OUT_DMAQ:
 644                 case TASKFILE_OUT_DMA:
 645                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 646                         break;
 647                 case TASKFILE_IN_DMAQ:
 648                 case TASKFILE_IN_DMA:
 649                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 650                         break;
 651                 case TASKFILE_MULTI_OUT:
 652                         if (!drive->mult_count) {
 653                                 /* (hs): give up if multcount is not set */
 654                                 printk(KERN_ERR "%s: %s Multimode Write " \
 655                                         "multcount is not set\n",
 656                                         drive->name, __FUNCTION__);
 657                                 err = -EPERM;
 658                                 goto abort;
 659                         }
 660                         /* fall through */
 661                 case TASKFILE_OUT:
 662                         args.prehandler = &pre_task_out_intr;
 663                         args.handler = &task_out_intr;
 664                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 665                         break;
 666                 case TASKFILE_MULTI_IN:
 667                         if (!drive->mult_count) {
 668                                 /* (hs): give up if multcount is not set */
 669                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 670                                         "multcount is not set\n",
 671                                         drive->name, __FUNCTION__);
 672                                 err = -EPERM;
 673                                 goto abort;
 674                         }
 675                         /* fall through */
 676                 case TASKFILE_IN:
 677                         args.handler = &task_in_intr;
 678                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 679                         break;
 680                 case TASKFILE_NO_DATA:
 681                         args.handler = &task_no_data_intr;
 682                         err = ide_diag_taskfile(drive, &args, 0, NULL);
 683                         break;
 684                 default:
 685                         err = -EFAULT;
 686                         goto abort;
 687         }
 688
 689         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 690         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 691         req_task->in_flags  = args.tf_in_flags;
 692
 693         if (copy_to_user(buf, req_task, tasksize)) {
 694                 err = -EFAULT;
 695                 goto abort;
 696         }
 697         if (taskout) {
 698                 int outtotal = tasksize;
 699                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 700                         err = -EFAULT;
 701                         goto abort;
 702                 }
 703         }
 704         if (taskin) {
 705                 int intotal = tasksize + taskout;
 706                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 707                         err = -EFAULT;
 708                         goto abort;
 709                 }
 710         }
 711 abort:
 712         kfree(req_task);
 713         kfree(outbuf);
 714         kfree(inbuf);
 715
 716 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 717
 718         drive->io_32bit = io_32bit;
 719
 720         return err;
 721 }
 722 #endif
 723
 724 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 725 {
 726         struct request rq;
 727         u8 buffer[4];
 728
 729         if (!buf)
 730                 buf = buffer;
 731         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 732         ide_init_drive_cmd(&rq);
 733         rq.buffer = buf;
 734         *buf++ = cmd;
 735         *buf++ = nsect;
 736         *buf++ = feature;
 737         *buf++ = sectors;
 738         return ide_do_drive_cmd(drive, &rq, ide_wait);
 739 }
 740
 741 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 742 {
 743         int err = 0;
 744         u8 args[4], *argbuf = args;
 745         u8 xfer_rate = 0;
 746         int argsize = 4;
 747         ide_task_t tfargs;
 748         struct ide_taskfile *tf = &tfargs.tf;
 749
 750         if (NULL == (void *) arg) {
 751                 struct request rq;
 752                 ide_init_drive_cmd(&rq);
 753                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 754         }
 755
 756         if (copy_from_user(args, (void __user *)arg, 4))
 757                 return -EFAULT;
 758
 759         memset(&tfargs, 0, sizeof(ide_task_t));
 760         tf->feature = args[2];
 761         tf->nsect   = args[3];
 762         tf->lbal    = args[1];
 763         tf->command = args[0];
 764
 765         if (args[3]) {
 766                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 767                 argbuf = kzalloc(argsize, GFP_KERNEL);
 768                 if (argbuf == NULL)
 769                         return -ENOMEM;
 770         }
 771         if (set_transfer(drive, &tfargs)) {
 772                 xfer_rate = args[1];
 773                 if (ide_ata66_check(drive, &tfargs))
 774                         goto abort;
 775         }
 776
 777         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 778
 779         if (!err && xfer_rate) {
 780                 /* active-retuning-calls future */
 781                 ide_set_xfer_rate(drive, xfer_rate);
 782                 ide_driveid_update(drive);
 783         }
 784 abort:
 785         if (copy_to_user((void __user *)arg, argbuf, argsize))
 786                 err = -EFAULT;
 787         if (argsize > 4)
 788                 kfree(argbuf);
 789         return err;
 790 }
 791
 792 static int ide_wait_cmd_task(ide_drive_t *drive, u8 *buf)
 793 {
 794         struct request rq;
 795
 796         ide_init_drive_cmd(&rq);
 797         rq.cmd_type = REQ_TYPE_ATA_TASK;
 798         rq.buffer = buf;
 799         return ide_do_drive_cmd(drive, &rq, ide_wait);
 800 }
 801
 802 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 803 {
 804         void __user *p = (void __user *)arg;
 805         int err = 0;
 806         u8 args[7], *argbuf = args;
 807         int argsize = 7;
 808
 809         if (copy_from_user(args, p, 7))
 810                 return -EFAULT;
 811         err = ide_wait_cmd_task(drive, argbuf);
 812         if (copy_to_user(p, argbuf, argsize))
 813                 err = -EFAULT;
 814         return err;
 815 }
 816
 817 /*
 818  * NOTICE: This is additions from IBM to provide a discrete interface,
 819  * for selective taskregister access operations.  Nice JOB Klaus!!!
 820  * Glad to be able to work and co-develop this with you and IBM.
 821  */
 822 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 823 {
 824         if (task->data_phase == TASKFILE_MULTI_IN ||
 825             task->data_phase == TASKFILE_MULTI_OUT) {
 826                 if (!drive->mult_count) {
 827                         printk(KERN_ERR "%s: multimode not set!\n", drive->name);
 828                         return ide_stopped;
 829                 }
 830         }
 831
 832         /*
 833          * (ks) Check taskfile in flags.
 834          * If set, then execute as it is defined.
 835          * If not set, then define default settings.
 836          * The default values are:
 837          *      read all taskfile registers (except data)
 838          *      read the hob registers (sector, nsector, lcyl, hcyl)
 839          */
 840         if (task->tf_in_flags.all == 0) {
 841                 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 842                 if (drive->addressing == 1)
 843                         task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
 844         }
 845
 846         return do_rw_taskfile(drive, task);
 847 }