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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 #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         switch (task->data_phase) {
 174         case TASKFILE_MULTI_OUT:
 175         case TASKFILE_OUT:
 176                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 177                 ndelay(400);    /* FIXME */
 178                 return pre_task_out_intr(drive, task->rq);
 179         case TASKFILE_MULTI_IN:
 180         case TASKFILE_IN:
 181         case TASKFILE_NO_DATA:
 182                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 183                 return ide_started;
 184         default:
 185                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 186                     hwif->dma_setup(drive))
 187                         return ide_stopped;
 188                 hwif->dma_exec_cmd(drive, tf->command);
 189                 hwif->dma_start(drive);
 190                 return ide_started;
 191         }
 192 }
 193
 194 /*
 195  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 196  */
 197 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 198 {
 199         ide_hwif_t *hwif = HWIF(drive);
 200         u8 stat;
 201
 202         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 203                 drive->mult_count = drive->mult_req;
 204         } else {
 205                 drive->mult_req = drive->mult_count = 0;
 206                 drive->special.b.recalibrate = 1;
 207                 (void) ide_dump_status(drive, "set_multmode", stat);
 208         }
 209         return ide_stopped;
 210 }
 211
 212 /*
 213  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 214  */
 215 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 216 {
 217         ide_hwif_t *hwif = HWIF(drive);
 218         int retries = 5;
 219         u8 stat;
 220
 221         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 222                 udelay(10);
 223
 224         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 225                 return ide_stopped;
 226
 227         if (stat & (ERR_STAT|DRQ_STAT))
 228                 return ide_error(drive, "set_geometry_intr", stat);
 229
 230         BUG_ON(HWGROUP(drive)->handler != NULL);
 231         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 232         return ide_started;
 233 }
 234
 235 /*
 236  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 237  */
 238 ide_startstop_t recal_intr (ide_drive_t *drive)
 239 {
 240         ide_hwif_t *hwif = HWIF(drive);
 241         u8 stat;
 242
 243         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 244                 return ide_error(drive, "recal_intr", stat);
 245         return ide_stopped;
 246 }
 247
 248 /*
 249  * Handler for commands without a data phase
 250  */
 251 ide_startstop_t task_no_data_intr (ide_drive_t *drive)
 252 {
 253         ide_task_t *args        = HWGROUP(drive)->rq->special;
 254         ide_hwif_t *hwif        = HWIF(drive);
 255         u8 stat;
 256
 257         local_irq_enable_in_hardirq();
 258         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 259                 return ide_error(drive, "task_no_data_intr", stat);
 260                 /* calls ide_end_drive_cmd */
 261         }
 262         if (args)
 263                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 264
 265         return ide_stopped;
 266 }
 267
 268 static u8 wait_drive_not_busy(ide_drive_t *drive)
 269 {
 270         ide_hwif_t *hwif = HWIF(drive);
 271         int retries;
 272         u8 stat;
 273
 274         /*
 275          * Last sector was transfered, wait until drive is ready.
 276          * This can take up to 10 usec, but we will wait max 1 ms
 277          * (drive_cmd_intr() waits that long).
 278          */
 279         for (retries = 0; retries < 100; retries++) {
 280                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 281                         udelay(10);
 282                 else
 283                         break;
 284         }
 285
 286         if (stat & BUSY_STAT)
 287                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 288
 289         return stat;
 290 }
 291
 292 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 293 {
 294         ide_hwif_t *hwif = drive->hwif;
 295         struct scatterlist *sg = hwif->sg_table;
 296         struct scatterlist *cursg = hwif->cursg;
 297         struct page *page;
 298 #ifdef CONFIG_HIGHMEM
 299         unsigned long flags;
 300 #endif
 301         unsigned int offset;
 302         u8 *buf;
 303
 304         cursg = hwif->cursg;
 305         if (!cursg) {
 306                 cursg = sg;
 307                 hwif->cursg = sg;
 308         }
 309
 310         page = sg_page(cursg);
 311         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 312
 313         /* get the current page and offset */
 314         page = nth_page(page, (offset >> PAGE_SHIFT));
 315         offset %= PAGE_SIZE;
 316
 317 #ifdef CONFIG_HIGHMEM
 318         local_irq_save(flags);
 319 #endif
 320         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 321
 322         hwif->nleft--;
 323         hwif->cursg_ofs++;
 324
 325         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 326                 hwif->cursg = sg_next(hwif->cursg);
 327                 hwif->cursg_ofs = 0;
 328         }
 329
 330         /* do the actual data transfer */
 331         if (write)
 332                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 333         else
 334                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 335
 336         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 337 #ifdef CONFIG_HIGHMEM
 338         local_irq_restore(flags);
 339 #endif
 340 }
 341
 342 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 343 {
 344         unsigned int nsect;
 345
 346         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 347         while (nsect--)
 348                 ide_pio_sector(drive, write);
 349 }
 350
 351 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 352                                      unsigned int write)
 353 {
 354         if (rq->bio)    /* fs request */
 355                 rq->errors = 0;
 356
 357         touch_softlockup_watchdog();
 358
 359         switch (drive->hwif->data_phase) {
 360         case TASKFILE_MULTI_IN:
 361         case TASKFILE_MULTI_OUT:
 362                 ide_pio_multi(drive, write);
 363                 break;
 364         default:
 365                 ide_pio_sector(drive, write);
 366                 break;
 367         }
 368 }
 369
 370 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 371                                   const char *s, u8 stat)
 372 {
 373         if (rq->bio) {
 374                 ide_hwif_t *hwif = drive->hwif;
 375                 int sectors = hwif->nsect - hwif->nleft;
 376
 377                 switch (hwif->data_phase) {
 378                 case TASKFILE_IN:
 379                         if (hwif->nleft)
 380                                 break;
 381                         /* fall through */
 382                 case TASKFILE_OUT:
 383                         sectors--;
 384                         break;
 385                 case TASKFILE_MULTI_IN:
 386                         if (hwif->nleft)
 387                                 break;
 388                         /* fall through */
 389                 case TASKFILE_MULTI_OUT:
 390                         sectors -= drive->mult_count;
 391                 default:
 392                         break;
 393                 }
 394
 395                 if (sectors > 0) {
 396                         ide_driver_t *drv;
 397
 398                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 399                         drv->end_request(drive, 1, sectors);
 400                 }
 401         }
 402         return ide_error(drive, s, stat);
 403 }
 404
 405 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 406 {
 407         HWIF(drive)->cursg = NULL;
 408
 409         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 410                 ide_task_t *task = rq->special;
 411
 412                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 413                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 414                         ide_end_drive_cmd(drive, stat, err);
 415                         return;
 416                 }
 417         }
 418
 419         if (rq->rq_disk) {
 420                 ide_driver_t *drv;
 421
 422                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 423                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 424         } else
 425                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 426 }
 427
 428 /*
 429  * Handler for command with PIO data-in phase (Read/Read Multiple).
 430  */
 431 ide_startstop_t task_in_intr (ide_drive_t *drive)
 432 {
 433         ide_hwif_t *hwif = drive->hwif;
 434         struct request *rq = HWGROUP(drive)->rq;
 435         u8 stat = hwif->INB(IDE_STATUS_REG);
 436
 437         /* new way for dealing with premature shared PCI interrupts */
 438         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 439                 if (stat & (ERR_STAT | DRQ_STAT))
 440                         return task_error(drive, rq, __FUNCTION__, stat);
 441                 /* No data yet, so wait for another IRQ. */
 442                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 443                 return ide_started;
 444         }
 445
 446         ide_pio_datablock(drive, rq, 0);
 447
 448         /* If it was the last datablock check status and finish transfer. */
 449         if (!hwif->nleft) {
 450                 stat = wait_drive_not_busy(drive);
 451                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 452                         return task_error(drive, rq, __FUNCTION__, stat);
 453                 task_end_request(drive, rq, stat);
 454                 return ide_stopped;
 455         }
 456
 457         /* Still data left to transfer. */
 458         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 459
 460         return ide_started;
 461 }
 462 EXPORT_SYMBOL(task_in_intr);
 463
 464 /*
 465  * Handler for command with PIO data-out phase (Write/Write Multiple).
 466  */
 467 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 468 {
 469         ide_hwif_t *hwif = drive->hwif;
 470         struct request *rq = HWGROUP(drive)->rq;
 471         u8 stat = hwif->INB(IDE_STATUS_REG);
 472
 473         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 474                 return task_error(drive, rq, __FUNCTION__, stat);
 475
 476         /* Deal with unexpected ATA data phase. */
 477         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 478                 return task_error(drive, rq, __FUNCTION__, stat);
 479
 480         if (!hwif->nleft) {
 481                 task_end_request(drive, rq, stat);
 482                 return ide_stopped;
 483         }
 484
 485         /* Still data left to transfer. */
 486         ide_pio_datablock(drive, rq, 1);
 487         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 488
 489         return ide_started;
 490 }
 491
 492 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 493 {
 494         ide_startstop_t startstop;
 495
 496         if (ide_wait_stat(&startstop, drive, DATA_READY,
 497                           drive->bad_wstat, WAIT_DRQ)) {
 498                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 499                                 drive->name,
 500                                 drive->hwif->data_phase ? "MULT" : "",
 501                                 drive->addressing ? "_EXT" : "");
 502                 return startstop;
 503         }
 504
 505         if (!drive->unmask)
 506                 local_irq_disable();
 507
 508         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 509         ide_pio_datablock(drive, rq, 1);
 510
 511         return ide_started;
 512 }
 513 EXPORT_SYMBOL(pre_task_out_intr);
 514
 515 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 516 {
 517         struct request rq;
 518
 519         memset(&rq, 0, sizeof(rq));
 520         rq.ref_count = 1;
 521         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 522         rq.buffer = buf;
 523
 524         /*
 525          * (ks) We transfer currently only whole sectors.
 526          * This is suffient for now.  But, it would be great,
 527          * if we would find a solution to transfer any size.
 528          * To support special commands like READ LONG.
 529          */
 530         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 531         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 532
 533         if (task->tf_flags & IDE_TFLAG_WRITE)
 534                 rq.cmd_flags |= REQ_RW;
 535
 536         rq.special = task;
 537         task->rq = &rq;
 538
 539         return ide_do_drive_cmd(drive, &rq, ide_wait);
 540 }
 541
 542 EXPORT_SYMBOL(ide_raw_taskfile);
 543
 544 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 545 {
 546         task->data_phase = TASKFILE_NO_DATA;
 547         task->handler    = task_no_data_intr;
 548
 549         return ide_raw_taskfile(drive, task, NULL, 0);
 550 }
 551 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 552
 553 #ifdef CONFIG_IDE_TASK_IOCTL
 554 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 555 {
 556         ide_task_request_t      *req_task;
 557         ide_task_t              args;
 558         u8 *outbuf              = NULL;
 559         u8 *inbuf               = NULL;
 560         u8 *data_buf            = NULL;
 561         int err                 = 0;
 562         int tasksize            = sizeof(struct ide_task_request_s);
 563         unsigned int taskin     = 0;
 564         unsigned int taskout    = 0;
 565         u16 nsect               = 0;
 566         u8 io_32bit             = drive->io_32bit;
 567         char __user *buf = (char __user *)arg;
 568
 569 //      printk("IDE Taskfile ...\n");
 570
 571         req_task = kzalloc(tasksize, GFP_KERNEL);
 572         if (req_task == NULL) return -ENOMEM;
 573         if (copy_from_user(req_task, buf, tasksize)) {
 574                 kfree(req_task);
 575                 return -EFAULT;
 576         }
 577
 578         taskout = req_task->out_size;
 579         taskin  = req_task->in_size;
 580
 581         if (taskin > 65536 || taskout > 65536) {
 582                 err = -EINVAL;
 583                 goto abort;
 584         }
 585
 586         if (taskout) {
 587                 int outtotal = tasksize;
 588                 outbuf = kzalloc(taskout, GFP_KERNEL);
 589                 if (outbuf == NULL) {
 590                         err = -ENOMEM;
 591                         goto abort;
 592                 }
 593                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 594                         err = -EFAULT;
 595                         goto abort;
 596                 }
 597         }
 598
 599         if (taskin) {
 600                 int intotal = tasksize + taskout;
 601                 inbuf = kzalloc(taskin, GFP_KERNEL);
 602                 if (inbuf == NULL) {
 603                         err = -ENOMEM;
 604                         goto abort;
 605                 }
 606                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 607                         err = -EFAULT;
 608                         goto abort;
 609                 }
 610         }
 611
 612         memset(&args, 0, sizeof(ide_task_t));
 613
 614         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 615         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 616
 617         args.data_phase = req_task->data_phase;
 618
 619         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 620         if (drive->addressing == 1)
 621                 args.tf_flags |= IDE_TFLAG_LBA48;
 622
 623         if (req_task->out_flags.all) {
 624                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 625
 626                 if (req_task->out_flags.b.data)
 627                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 628
 629                 if (req_task->out_flags.b.nsector_hob)
 630                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 631                 if (req_task->out_flags.b.sector_hob)
 632                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 633                 if (req_task->out_flags.b.lcyl_hob)
 634                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 635                 if (req_task->out_flags.b.hcyl_hob)
 636                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 637
 638                 if (req_task->out_flags.b.error_feature)
 639                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 640                 if (req_task->out_flags.b.nsector)
 641                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 642                 if (req_task->out_flags.b.sector)
 643                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 644                 if (req_task->out_flags.b.lcyl)
 645                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 646                 if (req_task->out_flags.b.hcyl)
 647                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 648         } else {
 649                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 650                 if (args.tf_flags & IDE_TFLAG_LBA48)
 651                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 652         }
 653
 654         if (req_task->in_flags.b.data)
 655                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 656
 657         drive->io_32bit = 0;
 658         switch(req_task->data_phase) {
 659                 case TASKFILE_MULTI_OUT:
 660                         if (!drive->mult_count) {
 661                                 /* (hs): give up if multcount is not set */
 662                                 printk(KERN_ERR "%s: %s Multimode Write " \
 663                                         "multcount is not set\n",
 664                                         drive->name, __FUNCTION__);
 665                                 err = -EPERM;
 666                                 goto abort;
 667                         }
 668                         /* fall through */
 669                 case TASKFILE_OUT:
 670                         args.handler = &task_out_intr;
 671                         /* fall through */
 672                 case TASKFILE_OUT_DMAQ:
 673                 case TASKFILE_OUT_DMA:
 674                         nsect = taskout / SECTOR_SIZE;
 675                         data_buf = outbuf;
 676                         break;
 677                 case TASKFILE_MULTI_IN:
 678                         if (!drive->mult_count) {
 679                                 /* (hs): give up if multcount is not set */
 680                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 681                                         "multcount is not set\n",
 682                                         drive->name, __FUNCTION__);
 683                                 err = -EPERM;
 684                                 goto abort;
 685                         }
 686                         /* fall through */
 687                 case TASKFILE_IN:
 688                         args.handler = &task_in_intr;
 689                         /* fall through */
 690                 case TASKFILE_IN_DMAQ:
 691                 case TASKFILE_IN_DMA:
 692                         nsect = taskin / SECTOR_SIZE;
 693                         data_buf = inbuf;
 694                         break;
 695                 case TASKFILE_NO_DATA:
 696                         args.handler = &task_no_data_intr;
 697                         break;
 698                 default:
 699                         err = -EFAULT;
 700                         goto abort;
 701         }
 702
 703         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 704                 nsect = 0;
 705         else if (!nsect) {
 706                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 707
 708                 if (!nsect) {
 709                         printk(KERN_ERR "%s: in/out command without data\n",
 710                                         drive->name);
 711                         err = -EFAULT;
 712                         goto abort;
 713                 }
 714         }
 715
 716         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 717                 args.tf_flags |= IDE_TFLAG_WRITE;
 718
 719         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 720
 721         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 722         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 723
 724         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 725             req_task->in_flags.all == 0) {
 726                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 727                 if (drive->addressing == 1)
 728                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 729         }
 730
 731         if (copy_to_user(buf, req_task, tasksize)) {
 732                 err = -EFAULT;
 733                 goto abort;
 734         }
 735         if (taskout) {
 736                 int outtotal = tasksize;
 737                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 738                         err = -EFAULT;
 739                         goto abort;
 740                 }
 741         }
 742         if (taskin) {
 743                 int intotal = tasksize + taskout;
 744                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 745                         err = -EFAULT;
 746                         goto abort;
 747                 }
 748         }
 749 abort:
 750         kfree(req_task);
 751         kfree(outbuf);
 752         kfree(inbuf);
 753
 754 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 755
 756         drive->io_32bit = io_32bit;
 757
 758         return err;
 759 }
 760 #endif
 761
 762 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 763 {
 764         struct request rq;
 765         u8 buffer[4];
 766
 767         if (!buf)
 768                 buf = buffer;
 769         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 770         ide_init_drive_cmd(&rq);
 771         rq.buffer = buf;
 772         *buf++ = cmd;
 773         *buf++ = nsect;
 774         *buf++ = feature;
 775         *buf++ = sectors;
 776         return ide_do_drive_cmd(drive, &rq, ide_wait);
 777 }
 778
 779 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 780 {
 781         int err = 0;
 782         u8 args[4], *argbuf = args;
 783         u8 xfer_rate = 0;
 784         int argsize = 4;
 785         ide_task_t tfargs;
 786         struct ide_taskfile *tf = &tfargs.tf;
 787
 788         if (NULL == (void *) arg) {
 789                 struct request rq;
 790                 ide_init_drive_cmd(&rq);
 791                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 792         }
 793
 794         if (copy_from_user(args, (void __user *)arg, 4))
 795                 return -EFAULT;
 796
 797         memset(&tfargs, 0, sizeof(ide_task_t));
 798         tf->feature = args[2];
 799         tf->nsect   = args[3];
 800         tf->lbal    = args[1];
 801         tf->command = args[0];
 802
 803         if (args[3]) {
 804                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 805                 argbuf = kzalloc(argsize, GFP_KERNEL);
 806                 if (argbuf == NULL)
 807                         return -ENOMEM;
 808         }
 809         if (set_transfer(drive, &tfargs)) {
 810                 xfer_rate = args[1];
 811                 if (ide_ata66_check(drive, &tfargs))
 812                         goto abort;
 813         }
 814
 815         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 816
 817         if (!err && xfer_rate) {
 818                 /* active-retuning-calls future */
 819                 ide_set_xfer_rate(drive, xfer_rate);
 820                 ide_driveid_update(drive);
 821         }
 822 abort:
 823         if (copy_to_user((void __user *)arg, argbuf, argsize))
 824                 err = -EFAULT;
 825         if (argsize > 4)
 826                 kfree(argbuf);
 827         return err;
 828 }
 829
 830 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 831 {
 832         void __user *p = (void __user *)arg;
 833         int err = 0;
 834         u8 args[7];
 835         ide_task_t task;
 836
 837         if (copy_from_user(args, p, 7))
 838                 return -EFAULT;
 839
 840         memset(&task, 0, sizeof(task));
 841         memcpy(&task.tf_array[7], &args[1], 6);
 842         task.tf.command = args[0];
 843         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 844
 845         err = ide_no_data_taskfile(drive, &task);
 846
 847         args[0] = task.tf.command;
 848         memcpy(&args[1], &task.tf_array[7], 6);
 849
 850         if (copy_to_user(p, args, 7))
 851                 err = -EFAULT;
 852
 853         return err;
 854 }