git.oblomov.eu Git - linux-2.6/blob - 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.command_type = IDE_DRIVE_TASK_IN;
 131         args.data_phase   = TASKFILE_IN;
 132         args.handler      = &task_in_intr;
 133         return ide_raw_taskfile(drive, &args, buf);
 134 }
 135
 136 static int inline task_dma_ok(ide_task_t *task)
 137 {
 138         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 139                 return 1;
 140
 141         switch (task->tf.command) {
 142                 case WIN_WRITEDMA_ONCE:
 143                 case WIN_WRITEDMA:
 144                 case WIN_WRITEDMA_EXT:
 145                 case WIN_READDMA_ONCE:
 146                 case WIN_READDMA:
 147                 case WIN_READDMA_EXT:
 148                 case WIN_IDENTIFY_DMA:
 149                         return 1;
 150         }
 151
 152         return 0;
 153 }
 154
 155 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 156 {
 157         ide_hwif_t *hwif        = HWIF(drive);
 158         struct ide_taskfile *tf = &task->tf;
 159
 160         ide_tf_load(drive, task);
 161
 162         if (task->handler != NULL) {
 163                 if (task->prehandler != NULL) {
 164                         hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 165                         ndelay(400);    /* FIXME */
 166                         return task->prehandler(drive, task->rq);
 167                 }
 168                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 169                 return ide_started;
 170         }
 171
 172         if (task_dma_ok(task) && drive->using_dma && !hwif->dma_setup(drive)) {
 173                 hwif->dma_exec_cmd(drive, tf->command);
 174                 hwif->dma_start(drive);
 175                 return ide_started;
 176         }
 177
 178         return ide_stopped;
 179 }
 180
 181 /*
 182  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 183  */
 184 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 185 {
 186         ide_hwif_t *hwif = HWIF(drive);
 187         u8 stat;
 188
 189         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 190                 drive->mult_count = drive->mult_req;
 191         } else {
 192                 drive->mult_req = drive->mult_count = 0;
 193                 drive->special.b.recalibrate = 1;
 194                 (void) ide_dump_status(drive, "set_multmode", stat);
 195         }
 196         return ide_stopped;
 197 }
 198
 199 /*
 200  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 201  */
 202 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 203 {
 204         ide_hwif_t *hwif = HWIF(drive);
 205         int retries = 5;
 206         u8 stat;
 207
 208         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 209                 udelay(10);
 210
 211         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 212                 return ide_stopped;
 213
 214         if (stat & (ERR_STAT|DRQ_STAT))
 215                 return ide_error(drive, "set_geometry_intr", stat);
 216
 217         BUG_ON(HWGROUP(drive)->handler != NULL);
 218         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 219         return ide_started;
 220 }
 221
 222 /*
 223  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 224  */
 225 ide_startstop_t recal_intr (ide_drive_t *drive)
 226 {
 227         ide_hwif_t *hwif = HWIF(drive);
 228         u8 stat;
 229
 230         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 231                 return ide_error(drive, "recal_intr", stat);
 232         return ide_stopped;
 233 }
 234
 235 /*
 236  * Handler for commands without a data phase
 237  */
 238 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 239 {
 240         ide_task_t *args        = HWGROUP(drive)->rq->special;
 241         ide_hwif_t *hwif        = HWIF(drive);
 242         u8 stat;
 243
 244         local_irq_enable_in_hardirq();
 245         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 246                 return ide_error(drive, "task_no_data_intr", stat);
 247                 /* calls ide_end_drive_cmd */
 248         }
 249         if (args)
 250                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 251
 252         return ide_stopped;
 253 }
 254
 255 static u8 wait_drive_not_busy(ide_drive_t *drive)
 256 {
 257         ide_hwif_t *hwif = HWIF(drive);
 258         int retries;
 259         u8 stat;
 260
 261         /*
 262          * Last sector was transfered, wait until drive is ready.
 263          * This can take up to 10 usec, but we will wait max 1 ms
 264          * (drive_cmd_intr() waits that long).
 265          */
 266         for (retries = 0; retries < 100; retries++) {
 267                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 268                         udelay(10);
 269                 else
 270                         break;
 271         }
 272
 273         if (stat & BUSY_STAT)
 274                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 275
 276         return stat;
 277 }
 278
 279 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 280 {
 281         ide_hwif_t *hwif = drive->hwif;
 282         struct scatterlist *sg = hwif->sg_table;
 283         struct scatterlist *cursg = hwif->cursg;
 284         struct page *page;
 285 #ifdef CONFIG_HIGHMEM
 286         unsigned long flags;
 287 #endif
 288         unsigned int offset;
 289         u8 *buf;
 290
 291         cursg = hwif->cursg;
 292         if (!cursg) {
 293                 cursg = sg;
 294                 hwif->cursg = sg;
 295         }
 296
 297         page = sg_page(cursg);
 298         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 299
 300         /* get the current page and offset */
 301         page = nth_page(page, (offset >> PAGE_SHIFT));
 302         offset %= PAGE_SIZE;
 303
 304 #ifdef CONFIG_HIGHMEM
 305         local_irq_save(flags);
 306 #endif
 307         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 308
 309         hwif->nleft--;
 310         hwif->cursg_ofs++;
 311
 312         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 313                 hwif->cursg = sg_next(hwif->cursg);
 314                 hwif->cursg_ofs = 0;
 315         }
 316
 317         /* do the actual data transfer */
 318         if (write)
 319                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 320         else
 321                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 322
 323         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 324 #ifdef CONFIG_HIGHMEM
 325         local_irq_restore(flags);
 326 #endif
 327 }
 328
 329 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 330 {
 331         unsigned int nsect;
 332
 333         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 334         while (nsect--)
 335                 ide_pio_sector(drive, write);
 336 }
 337
 338 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 339                                      unsigned int write)
 340 {
 341         if (rq->bio)    /* fs request */
 342                 rq->errors = 0;
 343
 344         touch_softlockup_watchdog();
 345
 346         switch (drive->hwif->data_phase) {
 347         case TASKFILE_MULTI_IN:
 348         case TASKFILE_MULTI_OUT:
 349                 ide_pio_multi(drive, write);
 350                 break;
 351         default:
 352                 ide_pio_sector(drive, write);
 353                 break;
 354         }
 355 }
 356
 357 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 358                                   const char *s, u8 stat)
 359 {
 360         if (rq->bio) {
 361                 ide_hwif_t *hwif = drive->hwif;
 362                 int sectors = hwif->nsect - hwif->nleft;
 363
 364                 switch (hwif->data_phase) {
 365                 case TASKFILE_IN:
 366                         if (hwif->nleft)
 367                                 break;
 368                         /* fall through */
 369                 case TASKFILE_OUT:
 370                         sectors--;
 371                         break;
 372                 case TASKFILE_MULTI_IN:
 373                         if (hwif->nleft)
 374                                 break;
 375                         /* fall through */
 376                 case TASKFILE_MULTI_OUT:
 377                         sectors -= drive->mult_count;
 378                 default:
 379                         break;
 380                 }
 381
 382                 if (sectors > 0) {
 383                         ide_driver_t *drv;
 384
 385                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 386                         drv->end_request(drive, 1, sectors);
 387                 }
 388         }
 389         return ide_error(drive, s, stat);
 390 }
 391
 392 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 393 {
 394         HWIF(drive)->cursg = NULL;
 395
 396         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 397                 ide_task_t *task = rq->special;
 398
 399                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 400                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 401                         ide_end_drive_cmd(drive, stat, err);
 402                         return;
 403                 }
 404         }
 405
 406         if (rq->rq_disk) {
 407                 ide_driver_t *drv;
 408
 409                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 410                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 411         } else
 412                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 413 }
 414
 415 /*
 416  * Handler for command with PIO data-in phase (Read/Read Multiple).
 417  */
 418 ide_startstop_t task_in_intr (ide_drive_t *drive)
 419 {
 420         ide_hwif_t *hwif = drive->hwif;
 421         struct request *rq = HWGROUP(drive)->rq;
 422         u8 stat = hwif->INB(IDE_STATUS_REG);
 423
 424         /* new way for dealing with premature shared PCI interrupts */
 425         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 426                 if (stat & (ERR_STAT | DRQ_STAT))
 427                         return task_error(drive, rq, __FUNCTION__, stat);
 428                 /* No data yet, so wait for another IRQ. */
 429                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 430                 return ide_started;
 431         }
 432
 433         ide_pio_datablock(drive, rq, 0);
 434
 435         /* If it was the last datablock check status and finish transfer. */
 436         if (!hwif->nleft) {
 437                 stat = wait_drive_not_busy(drive);
 438                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 439                         return task_error(drive, rq, __FUNCTION__, stat);
 440                 task_end_request(drive, rq, stat);
 441                 return ide_stopped;
 442         }
 443
 444         /* Still data left to transfer. */
 445         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 446
 447         return ide_started;
 448 }
 449 EXPORT_SYMBOL(task_in_intr);
 450
 451 /*
 452  * Handler for command with PIO data-out phase (Write/Write Multiple).
 453  */
 454 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 455 {
 456         ide_hwif_t *hwif = drive->hwif;
 457         struct request *rq = HWGROUP(drive)->rq;
 458         u8 stat = hwif->INB(IDE_STATUS_REG);
 459
 460         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 461                 return task_error(drive, rq, __FUNCTION__, stat);
 462
 463         /* Deal with unexpected ATA data phase. */
 464         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 465                 return task_error(drive, rq, __FUNCTION__, stat);
 466
 467         if (!hwif->nleft) {
 468                 task_end_request(drive, rq, stat);
 469                 return ide_stopped;
 470         }
 471
 472         /* Still data left to transfer. */
 473         ide_pio_datablock(drive, rq, 1);
 474         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 475
 476         return ide_started;
 477 }
 478
 479 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 480 {
 481         ide_startstop_t startstop;
 482
 483         if (ide_wait_stat(&startstop, drive, DATA_READY,
 484                           drive->bad_wstat, WAIT_DRQ)) {
 485                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 486                                 drive->name,
 487                                 drive->hwif->data_phase ? "MULT" : "",
 488                                 drive->addressing ? "_EXT" : "");
 489                 return startstop;
 490         }
 491
 492         if (!drive->unmask)
 493                 local_irq_disable();
 494
 495         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 496         ide_pio_datablock(drive, rq, 1);
 497
 498         return ide_started;
 499 }
 500 EXPORT_SYMBOL(pre_task_out_intr);
 501
 502 static int ide_diag_taskfile(ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
 503 {
 504         struct request rq;
 505
 506         memset(&rq, 0, sizeof(rq));
 507         rq.ref_count = 1;
 508         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 509         rq.buffer = buf;
 510
 511         /*
 512          * (ks) We transfer currently only whole sectors.
 513          * This is suffient for now.  But, it would be great,
 514          * if we would find a solution to transfer any size.
 515          * To support special commands like READ LONG.
 516          */
 517         if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
 518                 if (data_size == 0)
 519                         rq.nr_sectors = (args->tf.hob_nsect << 8) | args->tf.nsect;
 520                 else
 521                         rq.nr_sectors = data_size / SECTOR_SIZE;
 522
 523                 if (!rq.nr_sectors) {
 524                         printk(KERN_ERR "%s: in/out command without data\n",
 525                                         drive->name);
 526                         return -EFAULT;
 527                 }
 528
 529                 rq.hard_nr_sectors = rq.nr_sectors;
 530                 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
 531
 532                 if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE)
 533                         rq.cmd_flags |= REQ_RW;
 534         }
 535
 536         rq.special = args;
 537         args->rq = &rq;
 538         return ide_do_drive_cmd(drive, &rq, ide_wait);
 539 }
 540
 541 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 542 {
 543         return ide_diag_taskfile(drive, args, 0, buf);
 544 }
 545
 546 EXPORT_SYMBOL(ide_raw_taskfile);
 547
 548 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 549 {
 550         task->command_type = IDE_DRIVE_TASK_NO_DATA;
 551         task->data_phase   = TASKFILE_NO_DATA;
 552         task->handler      = task_no_data_intr;
 553
 554         return ide_raw_taskfile(drive, task, NULL);
 555 }
 556 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 557
 558 #ifdef CONFIG_IDE_TASK_IOCTL
 559 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 560 {
 561         ide_task_request_t      *req_task;
 562         ide_task_t              args;
 563         u8 *outbuf              = NULL;
 564         u8 *inbuf               = NULL;
 565         int err                 = 0;
 566         int tasksize            = sizeof(struct ide_task_request_s);
 567         unsigned int taskin     = 0;
 568         unsigned int taskout    = 0;
 569         u8 io_32bit             = drive->io_32bit;
 570         char __user *buf = (char __user *)arg;
 571
 572 //      printk("IDE Taskfile ...\n");
 573
 574         req_task = kzalloc(tasksize, GFP_KERNEL);
 575         if (req_task == NULL) return -ENOMEM;
 576         if (copy_from_user(req_task, buf, tasksize)) {
 577                 kfree(req_task);
 578                 return -EFAULT;
 579         }
 580
 581         taskout = req_task->out_size;
 582         taskin  = req_task->in_size;
 583
 584         if (taskin > 65536 || taskout > 65536) {
 585                 err = -EINVAL;
 586                 goto abort;
 587         }
 588
 589         if (taskout) {
 590                 int outtotal = tasksize;
 591                 outbuf = kzalloc(taskout, GFP_KERNEL);
 592                 if (outbuf == NULL) {
 593                         err = -ENOMEM;
 594                         goto abort;
 595                 }
 596                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 597                         err = -EFAULT;
 598                         goto abort;
 599                 }
 600         }
 601
 602         if (taskin) {
 603                 int intotal = tasksize + taskout;
 604                 inbuf = kzalloc(taskin, GFP_KERNEL);
 605                 if (inbuf == NULL) {
 606                         err = -ENOMEM;
 607                         goto abort;
 608                 }
 609                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 610                         err = -EFAULT;
 611                         goto abort;
 612                 }
 613         }
 614
 615         memset(&args, 0, sizeof(ide_task_t));
 616
 617         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 618         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 619         args.tf_in_flags  = req_task->in_flags;
 620         args.data_phase   = req_task->data_phase;
 621         args.command_type = req_task->req_cmd;
 622
 623         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 624         if (drive->addressing == 1)
 625                 args.tf_flags |= IDE_TFLAG_LBA48;
 626
 627         if (req_task->out_flags.all) {
 628                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 629
 630                 if (req_task->out_flags.b.data)
 631                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 632
 633                 if (req_task->out_flags.b.nsector_hob)
 634                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 635                 if (req_task->out_flags.b.sector_hob)
 636                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 637                 if (req_task->out_flags.b.lcyl_hob)
 638                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 639                 if (req_task->out_flags.b.hcyl_hob)
 640                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 641
 642                 if (req_task->out_flags.b.error_feature)
 643                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 644                 if (req_task->out_flags.b.nsector)
 645                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 646                 if (req_task->out_flags.b.sector)
 647                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 648                 if (req_task->out_flags.b.lcyl)
 649                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 650                 if (req_task->out_flags.b.hcyl)
 651                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 652         } else {
 653                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 654                 if (args.tf_flags & IDE_TFLAG_LBA48)
 655                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 656         }
 657
 658         drive->io_32bit = 0;
 659         switch(req_task->data_phase) {
 660                 case TASKFILE_OUT_DMAQ:
 661                 case TASKFILE_OUT_DMA:
 662                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 663                         break;
 664                 case TASKFILE_IN_DMAQ:
 665                 case TASKFILE_IN_DMA:
 666                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 667                         break;
 668                 case TASKFILE_MULTI_OUT:
 669                         if (!drive->mult_count) {
 670                                 /* (hs): give up if multcount is not set */
 671                                 printk(KERN_ERR "%s: %s Multimode Write " \
 672                                         "multcount is not set\n",
 673                                         drive->name, __FUNCTION__);
 674                                 err = -EPERM;
 675                                 goto abort;
 676                         }
 677                         /* fall through */
 678                 case TASKFILE_OUT:
 679                         args.prehandler = &pre_task_out_intr;
 680                         args.handler = &task_out_intr;
 681                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 682                         break;
 683                 case TASKFILE_MULTI_IN:
 684                         if (!drive->mult_count) {
 685                                 /* (hs): give up if multcount is not set */
 686                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 687                                         "multcount is not set\n",
 688                                         drive->name, __FUNCTION__);
 689                                 err = -EPERM;
 690                                 goto abort;
 691                         }
 692                         /* fall through */
 693                 case TASKFILE_IN:
 694                         args.handler = &task_in_intr;
 695                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 696                         break;
 697                 case TASKFILE_NO_DATA:
 698                         args.handler = &task_no_data_intr;
 699                         err = ide_diag_taskfile(drive, &args, 0, NULL);
 700                         break;
 701                 default:
 702                         err = -EFAULT;
 703                         goto abort;
 704         }
 705
 706         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 707         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 708         req_task->in_flags  = args.tf_in_flags;
 709
 710         if (copy_to_user(buf, req_task, tasksize)) {
 711                 err = -EFAULT;
 712                 goto abort;
 713         }
 714         if (taskout) {
 715                 int outtotal = tasksize;
 716                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 717                         err = -EFAULT;
 718                         goto abort;
 719                 }
 720         }
 721         if (taskin) {
 722                 int intotal = tasksize + taskout;
 723                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 724                         err = -EFAULT;
 725                         goto abort;
 726                 }
 727         }
 728 abort:
 729         kfree(req_task);
 730         kfree(outbuf);
 731         kfree(inbuf);
 732
 733 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 734
 735         drive->io_32bit = io_32bit;
 736
 737         return err;
 738 }
 739 #endif
 740
 741 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 742 {
 743         struct request rq;
 744         u8 buffer[4];
 745
 746         if (!buf)
 747                 buf = buffer;
 748         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 749         ide_init_drive_cmd(&rq);
 750         rq.buffer = buf;
 751         *buf++ = cmd;
 752         *buf++ = nsect;
 753         *buf++ = feature;
 754         *buf++ = sectors;
 755         return ide_do_drive_cmd(drive, &rq, ide_wait);
 756 }
 757
 758 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 759 {
 760         int err = 0;
 761         u8 args[4], *argbuf = args;
 762         u8 xfer_rate = 0;
 763         int argsize = 4;
 764         ide_task_t tfargs;
 765         struct ide_taskfile *tf = &tfargs.tf;
 766
 767         if (NULL == (void *) arg) {
 768                 struct request rq;
 769                 ide_init_drive_cmd(&rq);
 770                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 771         }
 772
 773         if (copy_from_user(args, (void __user *)arg, 4))
 774                 return -EFAULT;
 775
 776         memset(&tfargs, 0, sizeof(ide_task_t));
 777         tf->feature = args[2];
 778         tf->nsect   = args[3];
 779         tf->lbal    = args[1];
 780         tf->command = args[0];
 781
 782         if (args[3]) {
 783                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 784                 argbuf = kzalloc(argsize, GFP_KERNEL);
 785                 if (argbuf == NULL)
 786                         return -ENOMEM;
 787         }
 788         if (set_transfer(drive, &tfargs)) {
 789                 xfer_rate = args[1];
 790                 if (ide_ata66_check(drive, &tfargs))
 791                         goto abort;
 792         }
 793
 794         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 795
 796         if (!err && xfer_rate) {
 797                 /* active-retuning-calls future */
 798                 ide_set_xfer_rate(drive, xfer_rate);
 799                 ide_driveid_update(drive);
 800         }
 801 abort:
 802         if (copy_to_user((void __user *)arg, argbuf, argsize))
 803                 err = -EFAULT;
 804         if (argsize > 4)
 805                 kfree(argbuf);
 806         return err;
 807 }
 808
 809 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 810 {
 811         void __user *p = (void __user *)arg;
 812         int err = 0;
 813         u8 args[7];
 814         ide_task_t task;
 815
 816         if (copy_from_user(args, p, 7))
 817                 return -EFAULT;
 818
 819         memset(&task, 0, sizeof(task));
 820         memcpy(&task.tf_array[7], &args[1], 6);
 821         task.tf.command = args[0];
 822         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 823
 824         err = ide_no_data_taskfile(drive, &task);
 825
 826         args[0] = task.tf.command;
 827         memcpy(&args[1], &task.tf_array[7], 6);
 828
 829         if (copy_to_user(p, args, 7))
 830                 err = -EFAULT;
 831
 832         return err;
 833 }
 834
 835 /*
 836  * NOTICE: This is additions from IBM to provide a discrete interface,
 837  * for selective taskregister access operations.  Nice JOB Klaus!!!
 838  * Glad to be able to work and co-develop this with you and IBM.
 839  */
 840 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 841 {
 842         if (task->data_phase == TASKFILE_MULTI_IN ||
 843             task->data_phase == TASKFILE_MULTI_OUT) {
 844                 if (!drive->mult_count) {
 845                         printk(KERN_ERR "%s: multimode not set!\n", drive->name);
 846                         return ide_stopped;
 847                 }
 848         }
 849
 850         /*
 851          * (ks) Check taskfile in flags.
 852          * If set, then execute as it is defined.
 853          * If not set, then define default settings.
 854          * The default values are:
 855          *      read all taskfile registers (except data)
 856          *      read the hob registers (sector, nsector, lcyl, hcyl)
 857          */
 858         if (task->tf_in_flags.all == 0) {
 859                 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 860                 if (drive->addressing == 1)
 861                         task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
 862         }
 863
 864         return do_rw_taskfile(drive, task);
 865 }