drivers/ide/ide-taskfile.c

   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 #ifdef DEBUG
  76         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  77                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  78                 drive->name, tf->feature, tf->nsect, tf->lbal,
  79                 tf->lbam, tf->lbah, tf->device, tf->command);
  80 #endif
  81
  82         if (IDE_CONTROL_REG)
  83                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
  84
  85         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  86                 SELECT_MASK(drive, 0);
  87
  88         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  89                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  90
  91         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  92                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  93         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  94                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  95         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  96                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  97         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  98                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  99         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
 100                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
 101
 102         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
 103                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
 104         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
 105                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
 106         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
 107                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
 108         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
 109                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
 110         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
 111                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
 112
 113         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
 114                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
 115 }
 116
 117 EXPORT_SYMBOL_GPL(ide_tf_load);
 118
 119 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
 120 {
 121         ide_task_t args;
 122
 123         memset(&args, 0, sizeof(ide_task_t));
 124         args.tf.nsect = 0x01;
 125         if (drive->media == ide_disk)
 126                 args.tf.command = WIN_IDENTIFY;
 127         else
 128                 args.tf.command = WIN_PIDENTIFY;
 129         args.tf_flags   = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 130         args.data_phase = TASKFILE_IN;
 131         args.handler    = task_in_intr;
 132         return ide_raw_taskfile(drive, &args, buf, 1);
 133 }
 134
 135 static int inline task_dma_ok(ide_task_t *task)
 136 {
 137         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 138                 return 1;
 139
 140         switch (task->tf.command) {
 141                 case WIN_WRITEDMA_ONCE:
 142                 case WIN_WRITEDMA:
 143                 case WIN_WRITEDMA_EXT:
 144                 case WIN_READDMA_ONCE:
 145                 case WIN_READDMA:
 146                 case WIN_READDMA_EXT:
 147                 case WIN_IDENTIFY_DMA:
 148                         return 1;
 149         }
 150
 151         return 0;
 152 }
 153
 154 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 155 {
 156         ide_hwif_t *hwif        = HWIF(drive);
 157         struct ide_taskfile *tf = &task->tf;
 158
 159         if (task->data_phase == TASKFILE_MULTI_IN ||
 160             task->data_phase == TASKFILE_MULTI_OUT) {
 161                 if (!drive->mult_count) {
 162                         printk(KERN_ERR "%s: multimode not set!\n",
 163                                         drive->name);
 164                         return ide_stopped;
 165                 }
 166         }
 167
 168         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 169                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 170
 171         ide_tf_load(drive, task);
 172
 173         if (task->handler != NULL) {
 174                 if (task->prehandler != NULL) {
 175                         hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 176                         ndelay(400);    /* FIXME */
 177                         return task->prehandler(drive, task->rq);
 178                 }
 179                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 180                 return ide_started;
 181         }
 182
 183         if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
 184                 hwif->dma_exec_cmd(drive, tf->command);
 185                 hwif->dma_start(drive);
 186                 return ide_started;
 187         }
 188
 189         return ide_stopped;
 190 }
 191
 192 /*
 193  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 194  */
 195 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 196 {
 197         ide_hwif_t *hwif = HWIF(drive);
 198         u8 stat;
 199
 200         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 201                 drive->mult_count = drive->mult_req;
 202         } else {
 203                 drive->mult_req = drive->mult_count = 0;
 204                 drive->special.b.recalibrate = 1;
 205                 (void) ide_dump_status(drive, "set_multmode", stat);
 206         }
 207         return ide_stopped;
 208 }
 209
 210 /*
 211  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 212  */
 213 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 214 {
 215         ide_hwif_t *hwif = HWIF(drive);
 216         int retries = 5;
 217         u8 stat;
 218
 219         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 220                 udelay(10);
 221
 222         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 223                 return ide_stopped;
 224
 225         if (stat & (ERR_STAT|DRQ_STAT))
 226                 return ide_error(drive, "set_geometry_intr", stat);
 227
 228         BUG_ON(HWGROUP(drive)->handler != NULL);
 229         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 230         return ide_started;
 231 }
 232
 233 /*
 234  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 235  */
 236 ide_startstop_t recal_intr (ide_drive_t *drive)
 237 {
 238         ide_hwif_t *hwif = HWIF(drive);
 239         u8 stat;
 240
 241         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 242                 return ide_error(drive, "recal_intr", stat);
 243         return ide_stopped;
 244 }
 245
 246 /*
 247  * Handler for commands without a data phase
 248  */
 249 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 250 {
 251         ide_task_t *args        = HWGROUP(drive)->rq->special;
 252         ide_hwif_t *hwif        = HWIF(drive);
 253         u8 stat;
 254
 255         local_irq_enable_in_hardirq();
 256         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 257                 return ide_error(drive, "task_no_data_intr", stat);
 258                 /* calls ide_end_drive_cmd */
 259         }
 260         if (args)
 261                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 262
 263         return ide_stopped;
 264 }
 265
 266 static u8 wait_drive_not_busy(ide_drive_t *drive)
 267 {
 268         ide_hwif_t *hwif = HWIF(drive);
 269         int retries;
 270         u8 stat;
 271
 272         /*
 273          * Last sector was transfered, wait until drive is ready.
 274          * This can take up to 10 usec, but we will wait max 1 ms
 275          * (drive_cmd_intr() waits that long).
 276          */
 277         for (retries = 0; retries < 100; retries++) {
 278                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 279                         udelay(10);
 280                 else
 281                         break;
 282         }
 283
 284         if (stat & BUSY_STAT)
 285                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 286
 287         return stat;
 288 }
 289
 290 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 291 {
 292         ide_hwif_t *hwif = drive->hwif;
 293         struct scatterlist *sg = hwif->sg_table;
 294         struct scatterlist *cursg = hwif->cursg;
 295         struct page *page;
 296 #ifdef CONFIG_HIGHMEM
 297         unsigned long flags;
 298 #endif
 299         unsigned int offset;
 300         u8 *buf;
 301
 302         cursg = hwif->cursg;
 303         if (!cursg) {
 304                 cursg = sg;
 305                 hwif->cursg = sg;
 306         }
 307
 308         page = sg_page(cursg);
 309         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 310
 311         /* get the current page and offset */
 312         page = nth_page(page, (offset >> PAGE_SHIFT));
 313         offset %= PAGE_SIZE;
 314
 315 #ifdef CONFIG_HIGHMEM
 316         local_irq_save(flags);
 317 #endif
 318         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 319
 320         hwif->nleft--;
 321         hwif->cursg_ofs++;
 322
 323         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 324                 hwif->cursg = sg_next(hwif->cursg);
 325                 hwif->cursg_ofs = 0;
 326         }
 327
 328         /* do the actual data transfer */
 329         if (write)
 330                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 331         else
 332                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 333
 334         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 335 #ifdef CONFIG_HIGHMEM
 336         local_irq_restore(flags);
 337 #endif
 338 }
 339
 340 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 341 {
 342         unsigned int nsect;
 343
 344         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 345         while (nsect--)
 346                 ide_pio_sector(drive, write);
 347 }
 348
 349 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 350                                      unsigned int write)
 351 {
 352         if (rq->bio)    /* fs request */
 353                 rq->errors = 0;
 354
 355         touch_softlockup_watchdog();
 356
 357         switch (drive->hwif->data_phase) {
 358         case TASKFILE_MULTI_IN:
 359         case TASKFILE_MULTI_OUT:
 360                 ide_pio_multi(drive, write);
 361                 break;
 362         default:
 363                 ide_pio_sector(drive, write);
 364                 break;
 365         }
 366 }
 367
 368 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 369                                   const char *s, u8 stat)
 370 {
 371         if (rq->bio) {
 372                 ide_hwif_t *hwif = drive->hwif;
 373                 int sectors = hwif->nsect - hwif->nleft;
 374
 375                 switch (hwif->data_phase) {
 376                 case TASKFILE_IN:
 377                         if (hwif->nleft)
 378                                 break;
 379                         /* fall through */
 380                 case TASKFILE_OUT:
 381                         sectors--;
 382                         break;
 383                 case TASKFILE_MULTI_IN:
 384                         if (hwif->nleft)
 385                                 break;
 386                         /* fall through */
 387                 case TASKFILE_MULTI_OUT:
 388                         sectors -= drive->mult_count;
 389                 default:
 390                         break;
 391                 }
 392
 393                 if (sectors > 0) {
 394                         ide_driver_t *drv;
 395
 396                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 397                         drv->end_request(drive, 1, sectors);
 398                 }
 399         }
 400         return ide_error(drive, s, stat);
 401 }
 402
 403 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 404 {
 405         HWIF(drive)->cursg = NULL;
 406
 407         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 408                 ide_task_t *task = rq->special;
 409
 410                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 411                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 412                         ide_end_drive_cmd(drive, stat, err);
 413                         return;
 414                 }
 415         }
 416
 417         if (rq->rq_disk) {
 418                 ide_driver_t *drv;
 419
 420                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 421                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 422         } else
 423                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 424 }
 425
 426 /*
 427  * Handler for command with PIO data-in phase (Read/Read Multiple).
 428  */
 429 ide_startstop_t task_in_intr (ide_drive_t *drive)
 430 {
 431         ide_hwif_t *hwif = drive->hwif;
 432         struct request *rq = HWGROUP(drive)->rq;
 433         u8 stat = hwif->INB(IDE_STATUS_REG);
 434
 435         /* new way for dealing with premature shared PCI interrupts */
 436         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 437                 if (stat & (ERR_STAT | DRQ_STAT))
 438                         return task_error(drive, rq, __FUNCTION__, stat);
 439                 /* No data yet, so wait for another IRQ. */
 440                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 441                 return ide_started;
 442         }
 443
 444         ide_pio_datablock(drive, rq, 0);
 445
 446         /* If it was the last datablock check status and finish transfer. */
 447         if (!hwif->nleft) {
 448                 stat = wait_drive_not_busy(drive);
 449                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 450                         return task_error(drive, rq, __FUNCTION__, stat);
 451                 task_end_request(drive, rq, stat);
 452                 return ide_stopped;
 453         }
 454
 455         /* Still data left to transfer. */
 456         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 457
 458         return ide_started;
 459 }
 460 EXPORT_SYMBOL(task_in_intr);
 461
 462 /*
 463  * Handler for command with PIO data-out phase (Write/Write Multiple).
 464  */
 465 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 466 {
 467         ide_hwif_t *hwif = drive->hwif;
 468         struct request *rq = HWGROUP(drive)->rq;
 469         u8 stat = hwif->INB(IDE_STATUS_REG);
 470
 471         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 472                 return task_error(drive, rq, __FUNCTION__, stat);
 473
 474         /* Deal with unexpected ATA data phase. */
 475         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 476                 return task_error(drive, rq, __FUNCTION__, stat);
 477
 478         if (!hwif->nleft) {
 479                 task_end_request(drive, rq, stat);
 480                 return ide_stopped;
 481         }
 482
 483         /* Still data left to transfer. */
 484         ide_pio_datablock(drive, rq, 1);
 485         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 486
 487         return ide_started;
 488 }
 489
 490 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 491 {
 492         ide_startstop_t startstop;
 493
 494         if (ide_wait_stat(&startstop, drive, DATA_READY,
 495                           drive->bad_wstat, WAIT_DRQ)) {
 496                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 497                                 drive->name,
 498                                 drive->hwif->data_phase ? "MULT" : "",
 499                                 drive->addressing ? "_EXT" : "");
 500                 return startstop;
 501         }
 502
 503         if (!drive->unmask)
 504                 local_irq_disable();
 505
 506         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 507         ide_pio_datablock(drive, rq, 1);
 508
 509         return ide_started;
 510 }
 511 EXPORT_SYMBOL(pre_task_out_intr);
 512
 513 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 514 {
 515         struct request rq;
 516
 517         memset(&rq, 0, sizeof(rq));
 518         rq.ref_count = 1;
 519         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 520         rq.buffer = buf;
 521
 522         /*
 523          * (ks) We transfer currently only whole sectors.
 524          * This is suffient for now.  But, it would be great,
 525          * if we would find a solution to transfer any size.
 526          * To support special commands like READ LONG.
 527          */
 528         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 529         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 530
 531         if (task->tf_flags & IDE_TFLAG_WRITE)
 532                 rq.cmd_flags |= REQ_RW;
 533
 534         rq.special = task;
 535         task->rq = &rq;
 536
 537         return ide_do_drive_cmd(drive, &rq, ide_wait);
 538 }
 539
 540 EXPORT_SYMBOL(ide_raw_taskfile);
 541
 542 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 543 {
 544         task->data_phase = TASKFILE_NO_DATA;
 545         task->handler    = task_no_data_intr;
 546
 547         return ide_raw_taskfile(drive, task, NULL, 0);
 548 }
 549 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 550
 551 #ifdef CONFIG_IDE_TASK_IOCTL
 552 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 553 {
 554         ide_task_request_t      *req_task;
 555         ide_task_t              args;
 556         u8 *outbuf              = NULL;
 557         u8 *inbuf               = NULL;
 558         u8 *data_buf            = NULL;
 559         int err                 = 0;
 560         int tasksize            = sizeof(struct ide_task_request_s);
 561         unsigned int taskin     = 0;
 562         unsigned int taskout    = 0;
 563         u16 nsect               = 0;
 564         u8 io_32bit             = drive->io_32bit;
 565         char __user *buf = (char __user *)arg;
 566
 567 //      printk("IDE Taskfile ...\n");
 568
 569         req_task = kzalloc(tasksize, GFP_KERNEL);
 570         if (req_task == NULL) return -ENOMEM;
 571         if (copy_from_user(req_task, buf, tasksize)) {
 572                 kfree(req_task);
 573                 return -EFAULT;
 574         }
 575
 576         taskout = req_task->out_size;
 577         taskin  = req_task->in_size;
 578
 579         if (taskin > 65536 || taskout > 65536) {
 580                 err = -EINVAL;
 581                 goto abort;
 582         }
 583
 584         if (taskout) {
 585                 int outtotal = tasksize;
 586                 outbuf = kzalloc(taskout, GFP_KERNEL);
 587                 if (outbuf == NULL) {
 588                         err = -ENOMEM;
 589                         goto abort;
 590                 }
 591                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 592                         err = -EFAULT;
 593                         goto abort;
 594                 }
 595         }
 596
 597         if (taskin) {
 598                 int intotal = tasksize + taskout;
 599                 inbuf = kzalloc(taskin, GFP_KERNEL);
 600                 if (inbuf == NULL) {
 601                         err = -ENOMEM;
 602                         goto abort;
 603                 }
 604                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 605                         err = -EFAULT;
 606                         goto abort;
 607                 }
 608         }
 609
 610         memset(&args, 0, sizeof(ide_task_t));
 611
 612         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 613         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 614
 615         args.data_phase = req_task->data_phase;
 616
 617         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 618         if (drive->addressing == 1)
 619                 args.tf_flags |= IDE_TFLAG_LBA48;
 620
 621         if (req_task->out_flags.all) {
 622                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 623
 624                 if (req_task->out_flags.b.data)
 625                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 626
 627                 if (req_task->out_flags.b.nsector_hob)
 628                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 629                 if (req_task->out_flags.b.sector_hob)
 630                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 631                 if (req_task->out_flags.b.lcyl_hob)
 632                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 633                 if (req_task->out_flags.b.hcyl_hob)
 634                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 635
 636                 if (req_task->out_flags.b.error_feature)
 637                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 638                 if (req_task->out_flags.b.nsector)
 639                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 640                 if (req_task->out_flags.b.sector)
 641                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 642                 if (req_task->out_flags.b.lcyl)
 643                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 644                 if (req_task->out_flags.b.hcyl)
 645                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 646         } else {
 647                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 648                 if (args.tf_flags & IDE_TFLAG_LBA48)
 649                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 650         }
 651
 652         if (req_task->in_flags.b.data)
 653                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 654
 655         drive->io_32bit = 0;
 656         switch(req_task->data_phase) {
 657                 case TASKFILE_MULTI_OUT:
 658                         if (!drive->mult_count) {
 659                                 /* (hs): give up if multcount is not set */
 660                                 printk(KERN_ERR "%s: %s Multimode Write " \
 661                                         "multcount is not set\n",
 662                                         drive->name, __FUNCTION__);
 663                                 err = -EPERM;
 664                                 goto abort;
 665                         }
 666                         /* fall through */
 667                 case TASKFILE_OUT:
 668                         args.prehandler = &pre_task_out_intr;
 669                         args.handler = &task_out_intr;
 670                         /* fall through */
 671                 case TASKFILE_OUT_DMAQ:
 672                 case TASKFILE_OUT_DMA:
 673                         nsect = taskout / SECTOR_SIZE;
 674                         data_buf = outbuf;
 675                         break;
 676                 case TASKFILE_MULTI_IN:
 677                         if (!drive->mult_count) {
 678                                 /* (hs): give up if multcount is not set */
 679                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 680                                         "multcount is not set\n",
 681                                         drive->name, __FUNCTION__);
 682                                 err = -EPERM;
 683                                 goto abort;
 684                         }
 685                         /* fall through */
 686                 case TASKFILE_IN:
 687                         args.handler = &task_in_intr;
 688                         /* fall through */
 689                 case TASKFILE_IN_DMAQ:
 690                 case TASKFILE_IN_DMA:
 691                         nsect = taskin / SECTOR_SIZE;
 692                         data_buf = inbuf;
 693                         break;
 694                 case TASKFILE_NO_DATA:
 695                         args.handler = &task_no_data_intr;
 696                         break;
 697                 default:
 698                         err = -EFAULT;
 699                         goto abort;
 700         }
 701
 702         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 703                 nsect = 0;
 704         else if (!nsect) {
 705                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 706
 707                 if (!nsect) {
 708                         printk(KERN_ERR "%s: in/out command without data\n",
 709                                         drive->name);
 710                         err = -EFAULT;
 711                         goto abort;
 712                 }
 713         }
 714
 715         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 716                 args.tf_flags |= IDE_TFLAG_WRITE;
 717
 718         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 719
 720         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 721         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 722
 723         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 724             req_task->in_flags.all == 0) {
 725                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 726                 if (drive->addressing == 1)
 727                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 728         }
 729
 730         if (copy_to_user(buf, req_task, tasksize)) {
 731                 err = -EFAULT;
 732                 goto abort;
 733         }
 734         if (taskout) {
 735                 int outtotal = tasksize;
 736                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 737                         err = -EFAULT;
 738                         goto abort;
 739                 }
 740         }
 741         if (taskin) {
 742                 int intotal = tasksize + taskout;
 743                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 744                         err = -EFAULT;
 745                         goto abort;
 746                 }
 747         }
 748 abort:
 749         kfree(req_task);
 750         kfree(outbuf);
 751         kfree(inbuf);
 752
 753 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 754
 755         drive->io_32bit = io_32bit;
 756
 757         return err;
 758 }
 759 #endif
 760
 761 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 762 {
 763         struct request rq;
 764         u8 buffer[4];
 765
 766         if (!buf)
 767                 buf = buffer;
 768         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 769         ide_init_drive_cmd(&rq);
 770         rq.buffer = buf;
 771         *buf++ = cmd;
 772         *buf++ = nsect;
 773         *buf++ = feature;
 774         *buf++ = sectors;
 775         return ide_do_drive_cmd(drive, &rq, ide_wait);
 776 }
 777
 778 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 779 {
 780         int err = 0;
 781         u8 args[4], *argbuf = args;
 782         u8 xfer_rate = 0;
 783         int argsize = 4;
 784         ide_task_t tfargs;
 785         struct ide_taskfile *tf = &tfargs.tf;
 786
 787         if (NULL == (void *) arg) {
 788                 struct request rq;
 789                 ide_init_drive_cmd(&rq);
 790                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 791         }
 792
 793         if (copy_from_user(args, (void __user *)arg, 4))
 794                 return -EFAULT;
 795
 796         memset(&tfargs, 0, sizeof(ide_task_t));
 797         tf->feature = args[2];
 798         tf->nsect   = args[3];
 799         tf->lbal    = args[1];
 800         tf->command = args[0];
 801
 802         if (args[3]) {
 803                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 804                 argbuf = kzalloc(argsize, GFP_KERNEL);
 805                 if (argbuf == NULL)
 806                         return -ENOMEM;
 807         }
 808         if (set_transfer(drive, &tfargs)) {
 809                 xfer_rate = args[1];
 810                 if (ide_ata66_check(drive, &tfargs))
 811                         goto abort;
 812         }
 813
 814         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 815
 816         if (!err && xfer_rate) {
 817                 /* active-retuning-calls future */
 818                 ide_set_xfer_rate(drive, xfer_rate);
 819                 ide_driveid_update(drive);
 820         }
 821 abort:
 822         if (copy_to_user((void __user *)arg, argbuf, argsize))
 823                 err = -EFAULT;
 824         if (argsize > 4)
 825                 kfree(argbuf);
 826         return err;
 827 }
 828
 829 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 830 {
 831         void __user *p = (void __user *)arg;
 832         int err = 0;
 833         u8 args[7];
 834         ide_task_t task;
 835
 836         if (copy_from_user(args, p, 7))
 837                 return -EFAULT;
 838
 839         memset(&task, 0, sizeof(task));
 840         memcpy(&task.tf_array[7], &args[1], 6);
 841         task.tf.command = args[0];
 842         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 843
 844         err = ide_no_data_taskfile(drive, &task);
 845
 846         args[0] = task.tf.command;
 847         memcpy(&args[1], &task.tf_array[7], 6);
 848
 849         if (copy_to_user(p, args, 7))
 850                 err = -EFAULT;
 851
 852         return err;
 853 }