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.data_phase = TASKFILE_IN;
 131         return ide_raw_taskfile(drive, &args, buf, 1);
 132 }
 133
 134 static int inline task_dma_ok(ide_task_t *task)
 135 {
 136         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 137                 return 1;
 138
 139         switch (task->tf.command) {
 140                 case WIN_WRITEDMA_ONCE:
 141                 case WIN_WRITEDMA:
 142                 case WIN_WRITEDMA_EXT:
 143                 case WIN_READDMA_ONCE:
 144                 case WIN_READDMA:
 145                 case WIN_READDMA_EXT:
 146                 case WIN_IDENTIFY_DMA:
 147                         return 1;
 148         }
 149
 150         return 0;
 151 }
 152
 153 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 154 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 155 static ide_startstop_t recal_intr(ide_drive_t *);
 156 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 157
 158 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 159 {
 160         ide_hwif_t *hwif        = HWIF(drive);
 161         struct ide_taskfile *tf = &task->tf;
 162         ide_handler_t *handler = NULL;
 163
 164         if (task->data_phase == TASKFILE_MULTI_IN ||
 165             task->data_phase == TASKFILE_MULTI_OUT) {
 166                 if (!drive->mult_count) {
 167                         printk(KERN_ERR "%s: multimode not set!\n",
 168                                         drive->name);
 169                         return ide_stopped;
 170                 }
 171         }
 172
 173         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 174                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 175
 176         ide_tf_load(drive, task);
 177
 178         switch (task->data_phase) {
 179         case TASKFILE_MULTI_OUT:
 180         case TASKFILE_OUT:
 181                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 182                 ndelay(400);    /* FIXME */
 183                 return pre_task_out_intr(drive, task->rq);
 184         case TASKFILE_MULTI_IN:
 185         case TASKFILE_IN:
 186                 handler = task_in_intr;
 187                 /* fall-through */
 188         case TASKFILE_NO_DATA:
 189                 if (handler == NULL)
 190                         handler = task_no_data_intr;
 191                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 192                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 193                         switch (tf->command) {
 194                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 195                         case WIN_RESTORE: handler = recal_intr;         break;
 196                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 197                         }
 198                 }
 199                 ide_execute_command(drive, tf->command, handler,
 200                                     WAIT_WORSTCASE, NULL);
 201                 return ide_started;
 202         default:
 203                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 204                     hwif->dma_setup(drive))
 205                         return ide_stopped;
 206                 hwif->dma_exec_cmd(drive, tf->command);
 207                 hwif->dma_start(drive);
 208                 return ide_started;
 209         }
 210 }
 211
 212 /*
 213  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 214  */
 215 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 216 {
 217         ide_hwif_t *hwif = HWIF(drive);
 218         u8 stat;
 219
 220         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 221                 drive->mult_count = drive->mult_req;
 222         } else {
 223                 drive->mult_req = drive->mult_count = 0;
 224                 drive->special.b.recalibrate = 1;
 225                 (void) ide_dump_status(drive, "set_multmode", stat);
 226         }
 227         return ide_stopped;
 228 }
 229
 230 /*
 231  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 232  */
 233 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 234 {
 235         ide_hwif_t *hwif = HWIF(drive);
 236         int retries = 5;
 237         u8 stat;
 238
 239         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 240                 udelay(10);
 241
 242         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 243                 return ide_stopped;
 244
 245         if (stat & (ERR_STAT|DRQ_STAT))
 246                 return ide_error(drive, "set_geometry_intr", stat);
 247
 248         BUG_ON(HWGROUP(drive)->handler != NULL);
 249         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 250         return ide_started;
 251 }
 252
 253 /*
 254  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 255  */
 256 static ide_startstop_t recal_intr(ide_drive_t *drive)
 257 {
 258         ide_hwif_t *hwif = HWIF(drive);
 259         u8 stat;
 260
 261         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 262                 return ide_error(drive, "recal_intr", stat);
 263         return ide_stopped;
 264 }
 265
 266 /*
 267  * Handler for commands without a data phase
 268  */
 269 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 270 {
 271         ide_task_t *args        = HWGROUP(drive)->rq->special;
 272         ide_hwif_t *hwif        = HWIF(drive);
 273         u8 stat;
 274
 275         local_irq_enable_in_hardirq();
 276         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 277                 return ide_error(drive, "task_no_data_intr", stat);
 278                 /* calls ide_end_drive_cmd */
 279         }
 280         if (args)
 281                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 282
 283         return ide_stopped;
 284 }
 285
 286 static u8 wait_drive_not_busy(ide_drive_t *drive)
 287 {
 288         ide_hwif_t *hwif = HWIF(drive);
 289         int retries;
 290         u8 stat;
 291
 292         /*
 293          * Last sector was transfered, wait until drive is ready.
 294          * This can take up to 10 usec, but we will wait max 1 ms
 295          * (drive_cmd_intr() waits that long).
 296          */
 297         for (retries = 0; retries < 100; retries++) {
 298                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 299                         udelay(10);
 300                 else
 301                         break;
 302         }
 303
 304         if (stat & BUSY_STAT)
 305                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 306
 307         return stat;
 308 }
 309
 310 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 311 {
 312         ide_hwif_t *hwif = drive->hwif;
 313         struct scatterlist *sg = hwif->sg_table;
 314         struct scatterlist *cursg = hwif->cursg;
 315         struct page *page;
 316 #ifdef CONFIG_HIGHMEM
 317         unsigned long flags;
 318 #endif
 319         unsigned int offset;
 320         u8 *buf;
 321
 322         cursg = hwif->cursg;
 323         if (!cursg) {
 324                 cursg = sg;
 325                 hwif->cursg = sg;
 326         }
 327
 328         page = sg_page(cursg);
 329         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 330
 331         /* get the current page and offset */
 332         page = nth_page(page, (offset >> PAGE_SHIFT));
 333         offset %= PAGE_SIZE;
 334
 335 #ifdef CONFIG_HIGHMEM
 336         local_irq_save(flags);
 337 #endif
 338         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 339
 340         hwif->nleft--;
 341         hwif->cursg_ofs++;
 342
 343         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 344                 hwif->cursg = sg_next(hwif->cursg);
 345                 hwif->cursg_ofs = 0;
 346         }
 347
 348         /* do the actual data transfer */
 349         if (write)
 350                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 351         else
 352                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 353
 354         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 355 #ifdef CONFIG_HIGHMEM
 356         local_irq_restore(flags);
 357 #endif
 358 }
 359
 360 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 361 {
 362         unsigned int nsect;
 363
 364         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 365         while (nsect--)
 366                 ide_pio_sector(drive, write);
 367 }
 368
 369 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 370                                      unsigned int write)
 371 {
 372         if (rq->bio)    /* fs request */
 373                 rq->errors = 0;
 374
 375         touch_softlockup_watchdog();
 376
 377         switch (drive->hwif->data_phase) {
 378         case TASKFILE_MULTI_IN:
 379         case TASKFILE_MULTI_OUT:
 380                 ide_pio_multi(drive, write);
 381                 break;
 382         default:
 383                 ide_pio_sector(drive, write);
 384                 break;
 385         }
 386 }
 387
 388 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 389                                   const char *s, u8 stat)
 390 {
 391         if (rq->bio) {
 392                 ide_hwif_t *hwif = drive->hwif;
 393                 int sectors = hwif->nsect - hwif->nleft;
 394
 395                 switch (hwif->data_phase) {
 396                 case TASKFILE_IN:
 397                         if (hwif->nleft)
 398                                 break;
 399                         /* fall through */
 400                 case TASKFILE_OUT:
 401                         sectors--;
 402                         break;
 403                 case TASKFILE_MULTI_IN:
 404                         if (hwif->nleft)
 405                                 break;
 406                         /* fall through */
 407                 case TASKFILE_MULTI_OUT:
 408                         sectors -= drive->mult_count;
 409                 default:
 410                         break;
 411                 }
 412
 413                 if (sectors > 0) {
 414                         ide_driver_t *drv;
 415
 416                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 417                         drv->end_request(drive, 1, sectors);
 418                 }
 419         }
 420         return ide_error(drive, s, stat);
 421 }
 422
 423 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 424 {
 425         HWIF(drive)->cursg = NULL;
 426
 427         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 428                 ide_task_t *task = rq->special;
 429
 430                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 431                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 432                         ide_end_drive_cmd(drive, stat, err);
 433                         return;
 434                 }
 435         }
 436
 437         if (rq->rq_disk) {
 438                 ide_driver_t *drv;
 439
 440                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 441                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 442         } else
 443                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 444 }
 445
 446 /*
 447  * Handler for command with PIO data-in phase (Read/Read Multiple).
 448  */
 449 ide_startstop_t task_in_intr (ide_drive_t *drive)
 450 {
 451         ide_hwif_t *hwif = drive->hwif;
 452         struct request *rq = HWGROUP(drive)->rq;
 453         u8 stat = hwif->INB(IDE_STATUS_REG);
 454
 455         /* new way for dealing with premature shared PCI interrupts */
 456         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 457                 if (stat & (ERR_STAT | DRQ_STAT))
 458                         return task_error(drive, rq, __FUNCTION__, stat);
 459                 /* No data yet, so wait for another IRQ. */
 460                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 461                 return ide_started;
 462         }
 463
 464         ide_pio_datablock(drive, rq, 0);
 465
 466         /* If it was the last datablock check status and finish transfer. */
 467         if (!hwif->nleft) {
 468                 stat = wait_drive_not_busy(drive);
 469                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 470                         return task_error(drive, rq, __FUNCTION__, stat);
 471                 task_end_request(drive, rq, stat);
 472                 return ide_stopped;
 473         }
 474
 475         /* Still data left to transfer. */
 476         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 477
 478         return ide_started;
 479 }
 480 EXPORT_SYMBOL(task_in_intr);
 481
 482 /*
 483  * Handler for command with PIO data-out phase (Write/Write Multiple).
 484  */
 485 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 486 {
 487         ide_hwif_t *hwif = drive->hwif;
 488         struct request *rq = HWGROUP(drive)->rq;
 489         u8 stat = hwif->INB(IDE_STATUS_REG);
 490
 491         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 492                 return task_error(drive, rq, __FUNCTION__, stat);
 493
 494         /* Deal with unexpected ATA data phase. */
 495         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 496                 return task_error(drive, rq, __FUNCTION__, stat);
 497
 498         if (!hwif->nleft) {
 499                 task_end_request(drive, rq, stat);
 500                 return ide_stopped;
 501         }
 502
 503         /* Still data left to transfer. */
 504         ide_pio_datablock(drive, rq, 1);
 505         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 506
 507         return ide_started;
 508 }
 509
 510 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 511 {
 512         ide_startstop_t startstop;
 513
 514         if (ide_wait_stat(&startstop, drive, DATA_READY,
 515                           drive->bad_wstat, WAIT_DRQ)) {
 516                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 517                                 drive->name,
 518                                 drive->hwif->data_phase ? "MULT" : "",
 519                                 drive->addressing ? "_EXT" : "");
 520                 return startstop;
 521         }
 522
 523         if (!drive->unmask)
 524                 local_irq_disable();
 525
 526         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 527         ide_pio_datablock(drive, rq, 1);
 528
 529         return ide_started;
 530 }
 531 EXPORT_SYMBOL(pre_task_out_intr);
 532
 533 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 534 {
 535         struct request rq;
 536
 537         memset(&rq, 0, sizeof(rq));
 538         rq.ref_count = 1;
 539         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 540         rq.buffer = buf;
 541
 542         /*
 543          * (ks) We transfer currently only whole sectors.
 544          * This is suffient for now.  But, it would be great,
 545          * if we would find a solution to transfer any size.
 546          * To support special commands like READ LONG.
 547          */
 548         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 549         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 550
 551         if (task->tf_flags & IDE_TFLAG_WRITE)
 552                 rq.cmd_flags |= REQ_RW;
 553
 554         rq.special = task;
 555         task->rq = &rq;
 556
 557         return ide_do_drive_cmd(drive, &rq, ide_wait);
 558 }
 559
 560 EXPORT_SYMBOL(ide_raw_taskfile);
 561
 562 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 563 {
 564         task->data_phase = TASKFILE_NO_DATA;
 565
 566         return ide_raw_taskfile(drive, task, NULL, 0);
 567 }
 568 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 569
 570 #ifdef CONFIG_IDE_TASK_IOCTL
 571 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 572 {
 573         ide_task_request_t      *req_task;
 574         ide_task_t              args;
 575         u8 *outbuf              = NULL;
 576         u8 *inbuf               = NULL;
 577         u8 *data_buf            = NULL;
 578         int err                 = 0;
 579         int tasksize            = sizeof(struct ide_task_request_s);
 580         unsigned int taskin     = 0;
 581         unsigned int taskout    = 0;
 582         u16 nsect               = 0;
 583         u8 io_32bit             = drive->io_32bit;
 584         char __user *buf = (char __user *)arg;
 585
 586 //      printk("IDE Taskfile ...\n");
 587
 588         req_task = kzalloc(tasksize, GFP_KERNEL);
 589         if (req_task == NULL) return -ENOMEM;
 590         if (copy_from_user(req_task, buf, tasksize)) {
 591                 kfree(req_task);
 592                 return -EFAULT;
 593         }
 594
 595         taskout = req_task->out_size;
 596         taskin  = req_task->in_size;
 597
 598         if (taskin > 65536 || taskout > 65536) {
 599                 err = -EINVAL;
 600                 goto abort;
 601         }
 602
 603         if (taskout) {
 604                 int outtotal = tasksize;
 605                 outbuf = kzalloc(taskout, GFP_KERNEL);
 606                 if (outbuf == NULL) {
 607                         err = -ENOMEM;
 608                         goto abort;
 609                 }
 610                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 611                         err = -EFAULT;
 612                         goto abort;
 613                 }
 614         }
 615
 616         if (taskin) {
 617                 int intotal = tasksize + taskout;
 618                 inbuf = kzalloc(taskin, GFP_KERNEL);
 619                 if (inbuf == NULL) {
 620                         err = -ENOMEM;
 621                         goto abort;
 622                 }
 623                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 624                         err = -EFAULT;
 625                         goto abort;
 626                 }
 627         }
 628
 629         memset(&args, 0, sizeof(ide_task_t));
 630
 631         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 632         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 633
 634         args.data_phase = req_task->data_phase;
 635
 636         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 637         if (drive->addressing == 1)
 638                 args.tf_flags |= IDE_TFLAG_LBA48;
 639
 640         if (req_task->out_flags.all) {
 641                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 642
 643                 if (req_task->out_flags.b.data)
 644                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 645
 646                 if (req_task->out_flags.b.nsector_hob)
 647                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 648                 if (req_task->out_flags.b.sector_hob)
 649                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 650                 if (req_task->out_flags.b.lcyl_hob)
 651                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 652                 if (req_task->out_flags.b.hcyl_hob)
 653                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 654
 655                 if (req_task->out_flags.b.error_feature)
 656                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 657                 if (req_task->out_flags.b.nsector)
 658                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 659                 if (req_task->out_flags.b.sector)
 660                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 661                 if (req_task->out_flags.b.lcyl)
 662                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 663                 if (req_task->out_flags.b.hcyl)
 664                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 665         } else {
 666                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 667                 if (args.tf_flags & IDE_TFLAG_LBA48)
 668                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 669         }
 670
 671         if (req_task->in_flags.b.data)
 672                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 673
 674         drive->io_32bit = 0;
 675         switch(req_task->data_phase) {
 676                 case TASKFILE_MULTI_OUT:
 677                         if (!drive->mult_count) {
 678                                 /* (hs): give up if multcount is not set */
 679                                 printk(KERN_ERR "%s: %s Multimode Write " \
 680                                         "multcount is not set\n",
 681                                         drive->name, __FUNCTION__);
 682                                 err = -EPERM;
 683                                 goto abort;
 684                         }
 685                         /* fall through */
 686                 case TASKFILE_OUT:
 687                         /* fall through */
 688                 case TASKFILE_OUT_DMAQ:
 689                 case TASKFILE_OUT_DMA:
 690                         nsect = taskout / SECTOR_SIZE;
 691                         data_buf = outbuf;
 692                         break;
 693                 case TASKFILE_MULTI_IN:
 694                         if (!drive->mult_count) {
 695                                 /* (hs): give up if multcount is not set */
 696                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 697                                         "multcount is not set\n",
 698                                         drive->name, __FUNCTION__);
 699                                 err = -EPERM;
 700                                 goto abort;
 701                         }
 702                         /* fall through */
 703                 case TASKFILE_IN:
 704                         /* fall through */
 705                 case TASKFILE_IN_DMAQ:
 706                 case TASKFILE_IN_DMA:
 707                         nsect = taskin / SECTOR_SIZE;
 708                         data_buf = inbuf;
 709                         break;
 710                 case TASKFILE_NO_DATA:
 711                         break;
 712                 default:
 713                         err = -EFAULT;
 714                         goto abort;
 715         }
 716
 717         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 718                 nsect = 0;
 719         else if (!nsect) {
 720                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 721
 722                 if (!nsect) {
 723                         printk(KERN_ERR "%s: in/out command without data\n",
 724                                         drive->name);
 725                         err = -EFAULT;
 726                         goto abort;
 727                 }
 728         }
 729
 730         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 731                 args.tf_flags |= IDE_TFLAG_WRITE;
 732
 733         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 734
 735         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 736         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 737
 738         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 739             req_task->in_flags.all == 0) {
 740                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 741                 if (drive->addressing == 1)
 742                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 743         }
 744
 745         if (copy_to_user(buf, req_task, tasksize)) {
 746                 err = -EFAULT;
 747                 goto abort;
 748         }
 749         if (taskout) {
 750                 int outtotal = tasksize;
 751                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 752                         err = -EFAULT;
 753                         goto abort;
 754                 }
 755         }
 756         if (taskin) {
 757                 int intotal = tasksize + taskout;
 758                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 759                         err = -EFAULT;
 760                         goto abort;
 761                 }
 762         }
 763 abort:
 764         kfree(req_task);
 765         kfree(outbuf);
 766         kfree(inbuf);
 767
 768 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 769
 770         drive->io_32bit = io_32bit;
 771
 772         return err;
 773 }
 774 #endif
 775
 776 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 777 {
 778         struct request rq;
 779         u8 buffer[4];
 780
 781         if (!buf)
 782                 buf = buffer;
 783         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 784         ide_init_drive_cmd(&rq);
 785         rq.buffer = buf;
 786         *buf++ = cmd;
 787         *buf++ = nsect;
 788         *buf++ = feature;
 789         *buf++ = sectors;
 790         return ide_do_drive_cmd(drive, &rq, ide_wait);
 791 }
 792
 793 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 794 {
 795         int err = 0;
 796         u8 args[4], *argbuf = args;
 797         u8 xfer_rate = 0;
 798         int argsize = 4;
 799         ide_task_t tfargs;
 800         struct ide_taskfile *tf = &tfargs.tf;
 801
 802         if (NULL == (void *) arg) {
 803                 struct request rq;
 804                 ide_init_drive_cmd(&rq);
 805                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 806         }
 807
 808         if (copy_from_user(args, (void __user *)arg, 4))
 809                 return -EFAULT;
 810
 811         memset(&tfargs, 0, sizeof(ide_task_t));
 812         tf->feature = args[2];
 813         tf->nsect   = args[3];
 814         tf->lbal    = args[1];
 815         tf->command = args[0];
 816
 817         if (args[3]) {
 818                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 819                 argbuf = kzalloc(argsize, GFP_KERNEL);
 820                 if (argbuf == NULL)
 821                         return -ENOMEM;
 822         }
 823         if (set_transfer(drive, &tfargs)) {
 824                 xfer_rate = args[1];
 825                 if (ide_ata66_check(drive, &tfargs))
 826                         goto abort;
 827         }
 828
 829         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 830
 831         if (!err && xfer_rate) {
 832                 /* active-retuning-calls future */
 833                 ide_set_xfer_rate(drive, xfer_rate);
 834                 ide_driveid_update(drive);
 835         }
 836 abort:
 837         if (copy_to_user((void __user *)arg, argbuf, argsize))
 838                 err = -EFAULT;
 839         if (argsize > 4)
 840                 kfree(argbuf);
 841         return err;
 842 }
 843
 844 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 845 {
 846         void __user *p = (void __user *)arg;
 847         int err = 0;
 848         u8 args[7];
 849         ide_task_t task;
 850
 851         if (copy_from_user(args, p, 7))
 852                 return -EFAULT;
 853
 854         memset(&task, 0, sizeof(task));
 855         memcpy(&task.tf_array[7], &args[1], 6);
 856         task.tf.command = args[0];
 857         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 858
 859         err = ide_no_data_taskfile(drive, &task);
 860
 861         args[0] = task.tf.command;
 862         memcpy(&args[1], &task.tf_array[7], 6);
 863
 864         if (copy_to_user(p, args, 7))
 865                 err = -EFAULT;
 866
 867         return err;
 868 }