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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         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  81                 "lbam 0x%02x lbah 0x%02x\n",
  82                 drive->name, tf->hob_nsect, tf->hob_lbal,
  83                 tf->hob_lbam, tf->hob_lbah);
  84 #endif
  85
  86         if (IDE_CONTROL_REG)
  87                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG); /* clear nIEN */
  88
  89         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  90                 SELECT_MASK(drive, 0);
  91
  92         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  93                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  94
  95         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  96                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  97         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  98                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  99         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
 100                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
 101         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
 102                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
 103         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
 104                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
 105
 106         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
 107                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
 108         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
 109                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
 110         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
 111                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
 112         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
 113                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
 114         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
 115                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
 116
 117         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
 118                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
 119 }
 120
 121 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
 122 {
 123         ide_task_t args;
 124
 125         memset(&args, 0, sizeof(ide_task_t));
 126         args.tf.nsect = 0x01;
 127         if (drive->media == ide_disk)
 128                 args.tf.command = WIN_IDENTIFY;
 129         else
 130                 args.tf.command = WIN_PIDENTIFY;
 131         args.tf_flags   = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 132         args.data_phase = TASKFILE_IN;
 133         return ide_raw_taskfile(drive, &args, buf, 1);
 134 }
 135
 136 static int inline task_dma_ok(ide_task_t *task)
 137 {
 138         if (blk_fs_request(task->rq) || (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 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 156 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 157 static ide_startstop_t recal_intr(ide_drive_t *);
 158 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 159 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 160 static ide_startstop_t task_in_intr(ide_drive_t *);
 161
 162 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 163 {
 164         ide_hwif_t *hwif        = HWIF(drive);
 165         struct ide_taskfile *tf = &task->tf;
 166         ide_handler_t *handler = NULL;
 167
 168         if (task->data_phase == TASKFILE_MULTI_IN ||
 169             task->data_phase == TASKFILE_MULTI_OUT) {
 170                 if (!drive->mult_count) {
 171                         printk(KERN_ERR "%s: multimode not set!\n",
 172                                         drive->name);
 173                         return ide_stopped;
 174                 }
 175         }
 176
 177         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 178                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 179
 180         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 181                 ide_tf_load(drive, task);
 182
 183         switch (task->data_phase) {
 184         case TASKFILE_MULTI_OUT:
 185         case TASKFILE_OUT:
 186                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 187                 ndelay(400);    /* FIXME */
 188                 return pre_task_out_intr(drive, task->rq);
 189         case TASKFILE_MULTI_IN:
 190         case TASKFILE_IN:
 191                 handler = task_in_intr;
 192                 /* fall-through */
 193         case TASKFILE_NO_DATA:
 194                 if (handler == NULL)
 195                         handler = task_no_data_intr;
 196                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 197                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 198                         switch (tf->command) {
 199                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 200                         case WIN_RESTORE: handler = recal_intr;         break;
 201                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 202                         }
 203                 }
 204                 ide_execute_command(drive, tf->command, handler,
 205                                     WAIT_WORSTCASE, NULL);
 206                 return ide_started;
 207         default:
 208                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 209                     hwif->dma_setup(drive))
 210                         return ide_stopped;
 211                 hwif->dma_exec_cmd(drive, tf->command);
 212                 hwif->dma_start(drive);
 213                 return ide_started;
 214         }
 215 }
 216 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 217
 218 /*
 219  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 220  */
 221 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 222 {
 223         ide_hwif_t *hwif = HWIF(drive);
 224         u8 stat;
 225
 226         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 227                 drive->mult_count = drive->mult_req;
 228         } else {
 229                 drive->mult_req = drive->mult_count = 0;
 230                 drive->special.b.recalibrate = 1;
 231                 (void) ide_dump_status(drive, "set_multmode", stat);
 232         }
 233         return ide_stopped;
 234 }
 235
 236 /*
 237  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 238  */
 239 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 240 {
 241         ide_hwif_t *hwif = HWIF(drive);
 242         int retries = 5;
 243         u8 stat;
 244
 245         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 246                 udelay(10);
 247
 248         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 249                 return ide_stopped;
 250
 251         if (stat & (ERR_STAT|DRQ_STAT))
 252                 return ide_error(drive, "set_geometry_intr", stat);
 253
 254         BUG_ON(HWGROUP(drive)->handler != NULL);
 255         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 256         return ide_started;
 257 }
 258
 259 /*
 260  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 261  */
 262 static ide_startstop_t recal_intr(ide_drive_t *drive)
 263 {
 264         ide_hwif_t *hwif = HWIF(drive);
 265         u8 stat;
 266
 267         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 268                 return ide_error(drive, "recal_intr", stat);
 269         return ide_stopped;
 270 }
 271
 272 /*
 273  * Handler for commands without a data phase
 274  */
 275 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 276 {
 277         ide_task_t *args        = HWGROUP(drive)->rq->special;
 278         ide_hwif_t *hwif        = HWIF(drive);
 279         u8 stat;
 280
 281         local_irq_enable_in_hardirq();
 282         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 283                 return ide_error(drive, "task_no_data_intr", stat);
 284                 /* calls ide_end_drive_cmd */
 285         }
 286         if (args)
 287                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 288
 289         return ide_stopped;
 290 }
 291
 292 static u8 wait_drive_not_busy(ide_drive_t *drive)
 293 {
 294         ide_hwif_t *hwif = HWIF(drive);
 295         int retries;
 296         u8 stat;
 297
 298         /*
 299          * Last sector was transfered, wait until drive is ready.
 300          * This can take up to 10 usec, but we will wait max 1 ms
 301          * (drive_cmd_intr() waits that long).
 302          */
 303         for (retries = 0; retries < 100; retries++) {
 304                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 305                         udelay(10);
 306                 else
 307                         break;
 308         }
 309
 310         if (stat & BUSY_STAT)
 311                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 312
 313         return stat;
 314 }
 315
 316 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 317 {
 318         ide_hwif_t *hwif = drive->hwif;
 319         struct scatterlist *sg = hwif->sg_table;
 320         struct scatterlist *cursg = hwif->cursg;
 321         struct page *page;
 322 #ifdef CONFIG_HIGHMEM
 323         unsigned long flags;
 324 #endif
 325         unsigned int offset;
 326         u8 *buf;
 327
 328         cursg = hwif->cursg;
 329         if (!cursg) {
 330                 cursg = sg;
 331                 hwif->cursg = sg;
 332         }
 333
 334         page = sg_page(cursg);
 335         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 336
 337         /* get the current page and offset */
 338         page = nth_page(page, (offset >> PAGE_SHIFT));
 339         offset %= PAGE_SIZE;
 340
 341 #ifdef CONFIG_HIGHMEM
 342         local_irq_save(flags);
 343 #endif
 344         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 345
 346         hwif->nleft--;
 347         hwif->cursg_ofs++;
 348
 349         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 350                 hwif->cursg = sg_next(hwif->cursg);
 351                 hwif->cursg_ofs = 0;
 352         }
 353
 354         /* do the actual data transfer */
 355         if (write)
 356                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 357         else
 358                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 359
 360         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 361 #ifdef CONFIG_HIGHMEM
 362         local_irq_restore(flags);
 363 #endif
 364 }
 365
 366 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 367 {
 368         unsigned int nsect;
 369
 370         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 371         while (nsect--)
 372                 ide_pio_sector(drive, write);
 373 }
 374
 375 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 376                                      unsigned int write)
 377 {
 378         if (rq->bio)    /* fs request */
 379                 rq->errors = 0;
 380
 381         touch_softlockup_watchdog();
 382
 383         switch (drive->hwif->data_phase) {
 384         case TASKFILE_MULTI_IN:
 385         case TASKFILE_MULTI_OUT:
 386                 ide_pio_multi(drive, write);
 387                 break;
 388         default:
 389                 ide_pio_sector(drive, write);
 390                 break;
 391         }
 392 }
 393
 394 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 395                                   const char *s, u8 stat)
 396 {
 397         if (rq->bio) {
 398                 ide_hwif_t *hwif = drive->hwif;
 399                 int sectors = hwif->nsect - hwif->nleft;
 400
 401                 switch (hwif->data_phase) {
 402                 case TASKFILE_IN:
 403                         if (hwif->nleft)
 404                                 break;
 405                         /* fall through */
 406                 case TASKFILE_OUT:
 407                         sectors--;
 408                         break;
 409                 case TASKFILE_MULTI_IN:
 410                         if (hwif->nleft)
 411                                 break;
 412                         /* fall through */
 413                 case TASKFILE_MULTI_OUT:
 414                         sectors -= drive->mult_count;
 415                 default:
 416                         break;
 417                 }
 418
 419                 if (sectors > 0) {
 420                         ide_driver_t *drv;
 421
 422                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 423                         drv->end_request(drive, 1, sectors);
 424                 }
 425         }
 426         return ide_error(drive, s, stat);
 427 }
 428
 429 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 430 {
 431         HWIF(drive)->cursg = NULL;
 432
 433         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 434                 ide_task_t *task = rq->special;
 435
 436                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 437                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 438                         ide_end_drive_cmd(drive, stat, err);
 439                         return;
 440                 }
 441         }
 442
 443         if (rq->rq_disk) {
 444                 ide_driver_t *drv;
 445
 446                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 447                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 448         } else
 449                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 450 }
 451
 452 /*
 453  * Handler for command with PIO data-in phase (Read/Read Multiple).
 454  */
 455 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 456 {
 457         ide_hwif_t *hwif = drive->hwif;
 458         struct request *rq = HWGROUP(drive)->rq;
 459         u8 stat = hwif->INB(IDE_STATUS_REG);
 460
 461         /* new way for dealing with premature shared PCI interrupts */
 462         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 463                 if (stat & (ERR_STAT | DRQ_STAT))
 464                         return task_error(drive, rq, __FUNCTION__, stat);
 465                 /* No data yet, so wait for another IRQ. */
 466                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 467                 return ide_started;
 468         }
 469
 470         ide_pio_datablock(drive, rq, 0);
 471
 472         /* If it was the last datablock check status and finish transfer. */
 473         if (!hwif->nleft) {
 474                 stat = wait_drive_not_busy(drive);
 475                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 476                         return task_error(drive, rq, __FUNCTION__, stat);
 477                 task_end_request(drive, rq, stat);
 478                 return ide_stopped;
 479         }
 480
 481         /* Still data left to transfer. */
 482         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 483
 484         return ide_started;
 485 }
 486
 487 /*
 488  * Handler for command with PIO data-out phase (Write/Write Multiple).
 489  */
 490 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 491 {
 492         ide_hwif_t *hwif = drive->hwif;
 493         struct request *rq = HWGROUP(drive)->rq;
 494         u8 stat = hwif->INB(IDE_STATUS_REG);
 495
 496         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 497                 return task_error(drive, rq, __FUNCTION__, stat);
 498
 499         /* Deal with unexpected ATA data phase. */
 500         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 501                 return task_error(drive, rq, __FUNCTION__, stat);
 502
 503         if (!hwif->nleft) {
 504                 task_end_request(drive, rq, stat);
 505                 return ide_stopped;
 506         }
 507
 508         /* Still data left to transfer. */
 509         ide_pio_datablock(drive, rq, 1);
 510         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 511
 512         return ide_started;
 513 }
 514
 515 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 516 {
 517         ide_startstop_t startstop;
 518
 519         if (ide_wait_stat(&startstop, drive, DATA_READY,
 520                           drive->bad_wstat, WAIT_DRQ)) {
 521                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 522                                 drive->name,
 523                                 drive->hwif->data_phase ? "MULT" : "",
 524                                 drive->addressing ? "_EXT" : "");
 525                 return startstop;
 526         }
 527
 528         if (!drive->unmask)
 529                 local_irq_disable();
 530
 531         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 532         ide_pio_datablock(drive, rq, 1);
 533
 534         return ide_started;
 535 }
 536
 537 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 538 {
 539         struct request rq;
 540
 541         memset(&rq, 0, sizeof(rq));
 542         rq.ref_count = 1;
 543         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 544         rq.buffer = buf;
 545
 546         /*
 547          * (ks) We transfer currently only whole sectors.
 548          * This is suffient for now.  But, it would be great,
 549          * if we would find a solution to transfer any size.
 550          * To support special commands like READ LONG.
 551          */
 552         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 553         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 554
 555         if (task->tf_flags & IDE_TFLAG_WRITE)
 556                 rq.cmd_flags |= REQ_RW;
 557
 558         rq.special = task;
 559         task->rq = &rq;
 560
 561         return ide_do_drive_cmd(drive, &rq, ide_wait);
 562 }
 563
 564 EXPORT_SYMBOL(ide_raw_taskfile);
 565
 566 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 567 {
 568         task->data_phase = TASKFILE_NO_DATA;
 569
 570         return ide_raw_taskfile(drive, task, NULL, 0);
 571 }
 572 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 573
 574 #ifdef CONFIG_IDE_TASK_IOCTL
 575 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 576 {
 577         ide_task_request_t      *req_task;
 578         ide_task_t              args;
 579         u8 *outbuf              = NULL;
 580         u8 *inbuf               = NULL;
 581         u8 *data_buf            = NULL;
 582         int err                 = 0;
 583         int tasksize            = sizeof(struct ide_task_request_s);
 584         unsigned int taskin     = 0;
 585         unsigned int taskout    = 0;
 586         u16 nsect               = 0;
 587         u8 io_32bit             = drive->io_32bit;
 588         char __user *buf = (char __user *)arg;
 589
 590 //      printk("IDE Taskfile ...\n");
 591
 592         req_task = kzalloc(tasksize, GFP_KERNEL);
 593         if (req_task == NULL) return -ENOMEM;
 594         if (copy_from_user(req_task, buf, tasksize)) {
 595                 kfree(req_task);
 596                 return -EFAULT;
 597         }
 598
 599         taskout = req_task->out_size;
 600         taskin  = req_task->in_size;
 601
 602         if (taskin > 65536 || taskout > 65536) {
 603                 err = -EINVAL;
 604                 goto abort;
 605         }
 606
 607         if (taskout) {
 608                 int outtotal = tasksize;
 609                 outbuf = kzalloc(taskout, GFP_KERNEL);
 610                 if (outbuf == NULL) {
 611                         err = -ENOMEM;
 612                         goto abort;
 613                 }
 614                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 615                         err = -EFAULT;
 616                         goto abort;
 617                 }
 618         }
 619
 620         if (taskin) {
 621                 int intotal = tasksize + taskout;
 622                 inbuf = kzalloc(taskin, GFP_KERNEL);
 623                 if (inbuf == NULL) {
 624                         err = -ENOMEM;
 625                         goto abort;
 626                 }
 627                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 628                         err = -EFAULT;
 629                         goto abort;
 630                 }
 631         }
 632
 633         memset(&args, 0, sizeof(ide_task_t));
 634
 635         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 636         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 637
 638         args.data_phase = req_task->data_phase;
 639
 640         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 641         if (drive->addressing == 1)
 642                 args.tf_flags |= IDE_TFLAG_LBA48;
 643
 644         if (req_task->out_flags.all) {
 645                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 646
 647                 if (req_task->out_flags.b.data)
 648                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 649
 650                 if (req_task->out_flags.b.nsector_hob)
 651                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 652                 if (req_task->out_flags.b.sector_hob)
 653                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 654                 if (req_task->out_flags.b.lcyl_hob)
 655                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 656                 if (req_task->out_flags.b.hcyl_hob)
 657                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 658
 659                 if (req_task->out_flags.b.error_feature)
 660                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 661                 if (req_task->out_flags.b.nsector)
 662                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 663                 if (req_task->out_flags.b.sector)
 664                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 665                 if (req_task->out_flags.b.lcyl)
 666                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 667                 if (req_task->out_flags.b.hcyl)
 668                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 669         } else {
 670                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 671                 if (args.tf_flags & IDE_TFLAG_LBA48)
 672                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 673         }
 674
 675         if (req_task->in_flags.b.data)
 676                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 677
 678         drive->io_32bit = 0;
 679         switch(req_task->data_phase) {
 680                 case TASKFILE_MULTI_OUT:
 681                         if (!drive->mult_count) {
 682                                 /* (hs): give up if multcount is not set */
 683                                 printk(KERN_ERR "%s: %s Multimode Write " \
 684                                         "multcount is not set\n",
 685                                         drive->name, __FUNCTION__);
 686                                 err = -EPERM;
 687                                 goto abort;
 688                         }
 689                         /* fall through */
 690                 case TASKFILE_OUT:
 691                         /* fall through */
 692                 case TASKFILE_OUT_DMAQ:
 693                 case TASKFILE_OUT_DMA:
 694                         nsect = taskout / SECTOR_SIZE;
 695                         data_buf = outbuf;
 696                         break;
 697                 case TASKFILE_MULTI_IN:
 698                         if (!drive->mult_count) {
 699                                 /* (hs): give up if multcount is not set */
 700                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 701                                         "multcount is not set\n",
 702                                         drive->name, __FUNCTION__);
 703                                 err = -EPERM;
 704                                 goto abort;
 705                         }
 706                         /* fall through */
 707                 case TASKFILE_IN:
 708                         /* fall through */
 709                 case TASKFILE_IN_DMAQ:
 710                 case TASKFILE_IN_DMA:
 711                         nsect = taskin / SECTOR_SIZE;
 712                         data_buf = inbuf;
 713                         break;
 714                 case TASKFILE_NO_DATA:
 715                         break;
 716                 default:
 717                         err = -EFAULT;
 718                         goto abort;
 719         }
 720
 721         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 722                 nsect = 0;
 723         else if (!nsect) {
 724                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 725
 726                 if (!nsect) {
 727                         printk(KERN_ERR "%s: in/out command without data\n",
 728                                         drive->name);
 729                         err = -EFAULT;
 730                         goto abort;
 731                 }
 732         }
 733
 734         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 735                 args.tf_flags |= IDE_TFLAG_WRITE;
 736
 737         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 738
 739         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 740         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 741
 742         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 743             req_task->in_flags.all == 0) {
 744                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 745                 if (drive->addressing == 1)
 746                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 747         }
 748
 749         if (copy_to_user(buf, req_task, tasksize)) {
 750                 err = -EFAULT;
 751                 goto abort;
 752         }
 753         if (taskout) {
 754                 int outtotal = tasksize;
 755                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 756                         err = -EFAULT;
 757                         goto abort;
 758                 }
 759         }
 760         if (taskin) {
 761                 int intotal = tasksize + taskout;
 762                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 763                         err = -EFAULT;
 764                         goto abort;
 765                 }
 766         }
 767 abort:
 768         kfree(req_task);
 769         kfree(outbuf);
 770         kfree(inbuf);
 771
 772 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 773
 774         drive->io_32bit = io_32bit;
 775
 776         return err;
 777 }
 778 #endif
 779
 780 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 781 {
 782         struct request rq;
 783         u8 buffer[4];
 784
 785         if (!buf)
 786                 buf = buffer;
 787         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 788         ide_init_drive_cmd(&rq);
 789         rq.buffer = buf;
 790         *buf++ = cmd;
 791         *buf++ = nsect;
 792         *buf++ = feature;
 793         *buf++ = sectors;
 794         return ide_do_drive_cmd(drive, &rq, ide_wait);
 795 }
 796
 797 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 798 {
 799         int err = 0;
 800         u8 args[4], *argbuf = args;
 801         u8 xfer_rate = 0;
 802         int argsize = 4;
 803         ide_task_t tfargs;
 804         struct ide_taskfile *tf = &tfargs.tf;
 805
 806         if (NULL == (void *) arg) {
 807                 struct request rq;
 808                 ide_init_drive_cmd(&rq);
 809                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 810         }
 811
 812         if (copy_from_user(args, (void __user *)arg, 4))
 813                 return -EFAULT;
 814
 815         memset(&tfargs, 0, sizeof(ide_task_t));
 816         tf->feature = args[2];
 817         tf->nsect   = args[3];
 818         tf->lbal    = args[1];
 819         tf->command = args[0];
 820
 821         if (args[3]) {
 822                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 823                 argbuf = kzalloc(argsize, GFP_KERNEL);
 824                 if (argbuf == NULL)
 825                         return -ENOMEM;
 826         }
 827         if (set_transfer(drive, &tfargs)) {
 828                 xfer_rate = args[1];
 829                 if (ide_ata66_check(drive, &tfargs))
 830                         goto abort;
 831         }
 832
 833         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 834
 835         if (!err && xfer_rate) {
 836                 /* active-retuning-calls future */
 837                 ide_set_xfer_rate(drive, xfer_rate);
 838                 ide_driveid_update(drive);
 839         }
 840 abort:
 841         if (copy_to_user((void __user *)arg, argbuf, argsize))
 842                 err = -EFAULT;
 843         if (argsize > 4)
 844                 kfree(argbuf);
 845         return err;
 846 }
 847
 848 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 849 {
 850         void __user *p = (void __user *)arg;
 851         int err = 0;
 852         u8 args[7];
 853         ide_task_t task;
 854
 855         if (copy_from_user(args, p, 7))
 856                 return -EFAULT;
 857
 858         memset(&task, 0, sizeof(task));
 859         memcpy(&task.tf_array[7], &args[1], 6);
 860         task.tf.command = args[0];
 861         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 862
 863         err = ide_no_data_taskfile(drive, &task);
 864
 865         args[0] = task.tf.command;
 866         memcpy(&args[1], &task.tf_array[7], 6);
 867
 868         if (copy_to_user(p, args, 7))
 869                 err = -EFAULT;
 870
 871         return err;
 872 }