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 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  39 {
  40         ide_hwif_t *hwif = drive->hwif;
  41         struct ide_taskfile *tf = &task->tf;
  42         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  43
  44         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  45                 HIHI = 0xFF;
  46
  47 #ifdef DEBUG
  48         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  49                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  50                 drive->name, tf->feature, tf->nsect, tf->lbal,
  51                 tf->lbam, tf->lbah, tf->device, tf->command);
  52         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  53                 "lbam 0x%02x lbah 0x%02x\n",
  54                 drive->name, tf->hob_nsect, tf->hob_lbal,
  55                 tf->hob_lbam, tf->hob_lbah);
  56 #endif
  57
  58         ide_set_irq(drive, 1);
  59
  60         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  61                 SELECT_MASK(drive, 0);
  62
  63         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  64                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  65
  66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  67                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  69                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  71                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  73                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  74         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  75                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  76
  77         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  78                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  79         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  80                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  81         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  82                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
  83         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  84                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
  85         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  86                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
  87
  88         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  89                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
  90 }
  91
  92 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  93 {
  94         ide_task_t args;
  95
  96         memset(&args, 0, sizeof(ide_task_t));
  97         args.tf.nsect = 0x01;
  98         if (drive->media == ide_disk)
  99                 args.tf.command = WIN_IDENTIFY;
 100         else
 101                 args.tf.command = WIN_PIDENTIFY;
 102         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 103         args.data_phase = TASKFILE_IN;
 104         return ide_raw_taskfile(drive, &args, buf, 1);
 105 }
 106
 107 static int inline task_dma_ok(ide_task_t *task)
 108 {
 109         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
 110                 return 1;
 111
 112         switch (task->tf.command) {
 113                 case WIN_WRITEDMA_ONCE:
 114                 case WIN_WRITEDMA:
 115                 case WIN_WRITEDMA_EXT:
 116                 case WIN_READDMA_ONCE:
 117                 case WIN_READDMA:
 118                 case WIN_READDMA_EXT:
 119                 case WIN_IDENTIFY_DMA:
 120                         return 1;
 121         }
 122
 123         return 0;
 124 }
 125
 126 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 127 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 128 static ide_startstop_t recal_intr(ide_drive_t *);
 129 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 130 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 131 static ide_startstop_t task_in_intr(ide_drive_t *);
 132
 133 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 134 {
 135         ide_hwif_t *hwif        = HWIF(drive);
 136         struct ide_taskfile *tf = &task->tf;
 137         ide_handler_t *handler = NULL;
 138
 139         if (task->data_phase == TASKFILE_MULTI_IN ||
 140             task->data_phase == TASKFILE_MULTI_OUT) {
 141                 if (!drive->mult_count) {
 142                         printk(KERN_ERR "%s: multimode not set!\n",
 143                                         drive->name);
 144                         return ide_stopped;
 145                 }
 146         }
 147
 148         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 149                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 150
 151         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 152                 ide_tf_load(drive, task);
 153
 154         switch (task->data_phase) {
 155         case TASKFILE_MULTI_OUT:
 156         case TASKFILE_OUT:
 157                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 158                 ndelay(400);    /* FIXME */
 159                 return pre_task_out_intr(drive, task->rq);
 160         case TASKFILE_MULTI_IN:
 161         case TASKFILE_IN:
 162                 handler = task_in_intr;
 163                 /* fall-through */
 164         case TASKFILE_NO_DATA:
 165                 if (handler == NULL)
 166                         handler = task_no_data_intr;
 167                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 168                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 169                         switch (tf->command) {
 170                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 171                         case WIN_RESTORE: handler = recal_intr;         break;
 172                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 173                         }
 174                 }
 175                 ide_execute_command(drive, tf->command, handler,
 176                                     WAIT_WORSTCASE, NULL);
 177                 return ide_started;
 178         default:
 179                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 180                     hwif->dma_setup(drive))
 181                         return ide_stopped;
 182                 hwif->dma_exec_cmd(drive, tf->command);
 183                 hwif->dma_start(drive);
 184                 return ide_started;
 185         }
 186 }
 187 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 188
 189 /*
 190  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 191  */
 192 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 193 {
 194         ide_hwif_t *hwif = HWIF(drive);
 195         u8 stat;
 196
 197         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 198                 drive->mult_count = drive->mult_req;
 199         } else {
 200                 drive->mult_req = drive->mult_count = 0;
 201                 drive->special.b.recalibrate = 1;
 202                 (void) ide_dump_status(drive, "set_multmode", stat);
 203         }
 204         return ide_stopped;
 205 }
 206
 207 /*
 208  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 209  */
 210 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 211 {
 212         ide_hwif_t *hwif = HWIF(drive);
 213         int retries = 5;
 214         u8 stat;
 215
 216         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 217                 udelay(10);
 218
 219         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 220                 return ide_stopped;
 221
 222         if (stat & (ERR_STAT|DRQ_STAT))
 223                 return ide_error(drive, "set_geometry_intr", stat);
 224
 225         BUG_ON(HWGROUP(drive)->handler != NULL);
 226         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 227         return ide_started;
 228 }
 229
 230 /*
 231  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 232  */
 233 static ide_startstop_t recal_intr(ide_drive_t *drive)
 234 {
 235         ide_hwif_t *hwif = HWIF(drive);
 236         u8 stat;
 237
 238         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 239                 return ide_error(drive, "recal_intr", stat);
 240         return ide_stopped;
 241 }
 242
 243 /*
 244  * Handler for commands without a data phase
 245  */
 246 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 247 {
 248         ide_task_t *args        = HWGROUP(drive)->rq->special;
 249         ide_hwif_t *hwif        = HWIF(drive);
 250         u8 stat;
 251
 252         local_irq_enable_in_hardirq();
 253         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 254                 return ide_error(drive, "task_no_data_intr", stat);
 255                 /* calls ide_end_drive_cmd */
 256         }
 257         if (args)
 258                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 259
 260         return ide_stopped;
 261 }
 262
 263 u8 wait_drive_not_busy(ide_drive_t *drive)
 264 {
 265         ide_hwif_t *hwif = HWIF(drive);
 266         int retries;
 267         u8 stat;
 268
 269         /*
 270          * Last sector was transfered, wait until drive is ready.
 271          * This can take up to 10 usec, but we will wait max 1 ms.
 272          */
 273         for (retries = 0; retries < 100; retries++) {
 274                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 275                         udelay(10);
 276                 else
 277                         break;
 278         }
 279
 280         if (stat & BUSY_STAT)
 281                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 282
 283         return stat;
 284 }
 285
 286 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 287 {
 288         ide_hwif_t *hwif = drive->hwif;
 289         struct scatterlist *sg = hwif->sg_table;
 290         struct scatterlist *cursg = hwif->cursg;
 291         struct page *page;
 292 #ifdef CONFIG_HIGHMEM
 293         unsigned long flags;
 294 #endif
 295         unsigned int offset;
 296         u8 *buf;
 297
 298         cursg = hwif->cursg;
 299         if (!cursg) {
 300                 cursg = sg;
 301                 hwif->cursg = sg;
 302         }
 303
 304         page = sg_page(cursg);
 305         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 306
 307         /* get the current page and offset */
 308         page = nth_page(page, (offset >> PAGE_SHIFT));
 309         offset %= PAGE_SIZE;
 310
 311 #ifdef CONFIG_HIGHMEM
 312         local_irq_save(flags);
 313 #endif
 314         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 315
 316         hwif->nleft--;
 317         hwif->cursg_ofs++;
 318
 319         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 320                 hwif->cursg = sg_next(hwif->cursg);
 321                 hwif->cursg_ofs = 0;
 322         }
 323
 324         /* do the actual data transfer */
 325         if (write)
 326                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
 327         else
 328                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
 329
 330         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 331 #ifdef CONFIG_HIGHMEM
 332         local_irq_restore(flags);
 333 #endif
 334 }
 335
 336 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 337 {
 338         unsigned int nsect;
 339
 340         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 341         while (nsect--)
 342                 ide_pio_sector(drive, write);
 343 }
 344
 345 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 346                                      unsigned int write)
 347 {
 348         u8 saved_io_32bit = drive->io_32bit;
 349
 350         if (rq->bio)    /* fs request */
 351                 rq->errors = 0;
 352
 353         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 354                 ide_task_t *task = rq->special;
 355
 356                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 357                         drive->io_32bit = 0;
 358         }
 359
 360         touch_softlockup_watchdog();
 361
 362         switch (drive->hwif->data_phase) {
 363         case TASKFILE_MULTI_IN:
 364         case TASKFILE_MULTI_OUT:
 365                 ide_pio_multi(drive, write);
 366                 break;
 367         default:
 368                 ide_pio_sector(drive, write);
 369                 break;
 370         }
 371
 372         drive->io_32bit = saved_io_32bit;
 373 }
 374
 375 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 376                                   const char *s, u8 stat)
 377 {
 378         if (rq->bio) {
 379                 ide_hwif_t *hwif = drive->hwif;
 380                 int sectors = hwif->nsect - hwif->nleft;
 381
 382                 switch (hwif->data_phase) {
 383                 case TASKFILE_IN:
 384                         if (hwif->nleft)
 385                                 break;
 386                         /* fall through */
 387                 case TASKFILE_OUT:
 388                         sectors--;
 389                         break;
 390                 case TASKFILE_MULTI_IN:
 391                         if (hwif->nleft)
 392                                 break;
 393                         /* fall through */
 394                 case TASKFILE_MULTI_OUT:
 395                         sectors -= drive->mult_count;
 396                 default:
 397                         break;
 398                 }
 399
 400                 if (sectors > 0) {
 401                         ide_driver_t *drv;
 402
 403                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 404                         drv->end_request(drive, 1, sectors);
 405                 }
 406         }
 407         return ide_error(drive, s, stat);
 408 }
 409
 410 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 411 {
 412         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 413                 u8 err = drive->hwif->INB(IDE_ERROR_REG);
 414
 415                 ide_end_drive_cmd(drive, stat, err);
 416                 return;
 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->nr_sectors);
 424         } else
 425                 ide_end_request(drive, 1, rq->nr_sectors);
 426 }
 427
 428 /*
 429  * Handler for command with PIO data-in phase (Read/Read Multiple).
 430  */
 431 static 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, DRQ_STAT, 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_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
 463 /*
 464  * Handler for command with PIO data-out phase (Write/Write Multiple).
 465  */
 466 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 467 {
 468         ide_hwif_t *hwif = drive->hwif;
 469         struct request *rq = HWGROUP(drive)->rq;
 470         u8 stat = hwif->INB(IDE_STATUS_REG);
 471
 472         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 473                 return task_error(drive, rq, __FUNCTION__, stat);
 474
 475         /* Deal with unexpected ATA data phase. */
 476         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 477                 return task_error(drive, rq, __FUNCTION__, stat);
 478
 479         if (!hwif->nleft) {
 480                 task_end_request(drive, rq, stat);
 481                 return ide_stopped;
 482         }
 483
 484         /* Still data left to transfer. */
 485         ide_pio_datablock(drive, rq, 1);
 486         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 487
 488         return ide_started;
 489 }
 490
 491 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 492 {
 493         ide_startstop_t startstop;
 494
 495         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 496                           drive->bad_wstat, WAIT_DRQ)) {
 497                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 498                                 drive->name,
 499                                 drive->hwif->data_phase ? "MULT" : "",
 500                                 drive->addressing ? "_EXT" : "");
 501                 return startstop;
 502         }
 503
 504         if (!drive->unmask)
 505                 local_irq_disable();
 506
 507         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 508         ide_pio_datablock(drive, rq, 1);
 509
 510         return ide_started;
 511 }
 512
 513 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 514 {
 515         struct request rq;
 516
 517         memset(&rq, 0, sizeof(rq));
 518         rq.ref_count = 1;
 519         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 520         rq.buffer = buf;
 521
 522         /*
 523          * (ks) We transfer currently only whole sectors.
 524          * This is suffient for now.  But, it would be great,
 525          * if we would find a solution to transfer any size.
 526          * To support special commands like READ LONG.
 527          */
 528         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 529         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 530
 531         if (task->tf_flags & IDE_TFLAG_WRITE)
 532                 rq.cmd_flags |= REQ_RW;
 533
 534         rq.special = task;
 535         task->rq = &rq;
 536
 537         return ide_do_drive_cmd(drive, &rq, ide_wait);
 538 }
 539
 540 EXPORT_SYMBOL(ide_raw_taskfile);
 541
 542 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 543 {
 544         task->data_phase = TASKFILE_NO_DATA;
 545
 546         return ide_raw_taskfile(drive, task, NULL, 0);
 547 }
 548 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 549
 550 #ifdef CONFIG_IDE_TASK_IOCTL
 551 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 552 {
 553         ide_task_request_t      *req_task;
 554         ide_task_t              args;
 555         u8 *outbuf              = NULL;
 556         u8 *inbuf               = NULL;
 557         u8 *data_buf            = NULL;
 558         int err                 = 0;
 559         int tasksize            = sizeof(struct ide_task_request_s);
 560         unsigned int taskin     = 0;
 561         unsigned int taskout    = 0;
 562         u16 nsect               = 0;
 563         char __user *buf = (char __user *)arg;
 564
 565 //      printk("IDE Taskfile ...\n");
 566
 567         req_task = kzalloc(tasksize, GFP_KERNEL);
 568         if (req_task == NULL) return -ENOMEM;
 569         if (copy_from_user(req_task, buf, tasksize)) {
 570                 kfree(req_task);
 571                 return -EFAULT;
 572         }
 573
 574         taskout = req_task->out_size;
 575         taskin  = req_task->in_size;
 576
 577         if (taskin > 65536 || taskout > 65536) {
 578                 err = -EINVAL;
 579                 goto abort;
 580         }
 581
 582         if (taskout) {
 583                 int outtotal = tasksize;
 584                 outbuf = kzalloc(taskout, GFP_KERNEL);
 585                 if (outbuf == NULL) {
 586                         err = -ENOMEM;
 587                         goto abort;
 588                 }
 589                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 590                         err = -EFAULT;
 591                         goto abort;
 592                 }
 593         }
 594
 595         if (taskin) {
 596                 int intotal = tasksize + taskout;
 597                 inbuf = kzalloc(taskin, GFP_KERNEL);
 598                 if (inbuf == NULL) {
 599                         err = -ENOMEM;
 600                         goto abort;
 601                 }
 602                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 603                         err = -EFAULT;
 604                         goto abort;
 605                 }
 606         }
 607
 608         memset(&args, 0, sizeof(ide_task_t));
 609
 610         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 611         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 612
 613         args.data_phase = req_task->data_phase;
 614
 615         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 616                         IDE_TFLAG_IN_TF;
 617         if (drive->addressing == 1)
 618                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 619
 620         if (req_task->out_flags.all) {
 621                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 622
 623                 if (req_task->out_flags.b.data)
 624                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 625
 626                 if (req_task->out_flags.b.nsector_hob)
 627                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 628                 if (req_task->out_flags.b.sector_hob)
 629                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 630                 if (req_task->out_flags.b.lcyl_hob)
 631                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 632                 if (req_task->out_flags.b.hcyl_hob)
 633                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 634
 635                 if (req_task->out_flags.b.error_feature)
 636                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 637                 if (req_task->out_flags.b.nsector)
 638                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 639                 if (req_task->out_flags.b.sector)
 640                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 641                 if (req_task->out_flags.b.lcyl)
 642                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 643                 if (req_task->out_flags.b.hcyl)
 644                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 645         } else {
 646                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 647                 if (args.tf_flags & IDE_TFLAG_LBA48)
 648                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 649         }
 650
 651         if (req_task->in_flags.b.data)
 652                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 653
 654         switch(req_task->data_phase) {
 655                 case TASKFILE_MULTI_OUT:
 656                         if (!drive->mult_count) {
 657                                 /* (hs): give up if multcount is not set */
 658                                 printk(KERN_ERR "%s: %s Multimode Write " \
 659                                         "multcount is not set\n",
 660                                         drive->name, __FUNCTION__);
 661                                 err = -EPERM;
 662                                 goto abort;
 663                         }
 664                         /* fall through */
 665                 case TASKFILE_OUT:
 666                         /* fall through */
 667                 case TASKFILE_OUT_DMAQ:
 668                 case TASKFILE_OUT_DMA:
 669                         nsect = taskout / SECTOR_SIZE;
 670                         data_buf = outbuf;
 671                         break;
 672                 case TASKFILE_MULTI_IN:
 673                         if (!drive->mult_count) {
 674                                 /* (hs): give up if multcount is not set */
 675                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 676                                         "multcount is not set\n",
 677                                         drive->name, __FUNCTION__);
 678                                 err = -EPERM;
 679                                 goto abort;
 680                         }
 681                         /* fall through */
 682                 case TASKFILE_IN:
 683                         /* fall through */
 684                 case TASKFILE_IN_DMAQ:
 685                 case TASKFILE_IN_DMA:
 686                         nsect = taskin / SECTOR_SIZE;
 687                         data_buf = inbuf;
 688                         break;
 689                 case TASKFILE_NO_DATA:
 690                         break;
 691                 default:
 692                         err = -EFAULT;
 693                         goto abort;
 694         }
 695
 696         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 697                 nsect = 0;
 698         else if (!nsect) {
 699                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 700
 701                 if (!nsect) {
 702                         printk(KERN_ERR "%s: in/out command without data\n",
 703                                         drive->name);
 704                         err = -EFAULT;
 705                         goto abort;
 706                 }
 707         }
 708
 709         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 710                 args.tf_flags |= IDE_TFLAG_WRITE;
 711
 712         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 713
 714         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 715         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 716
 717         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 718             req_task->in_flags.all == 0) {
 719                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 720                 if (drive->addressing == 1)
 721                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 722         }
 723
 724         if (copy_to_user(buf, req_task, tasksize)) {
 725                 err = -EFAULT;
 726                 goto abort;
 727         }
 728         if (taskout) {
 729                 int outtotal = tasksize;
 730                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 731                         err = -EFAULT;
 732                         goto abort;
 733                 }
 734         }
 735         if (taskin) {
 736                 int intotal = tasksize + taskout;
 737                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 738                         err = -EFAULT;
 739                         goto abort;
 740                 }
 741         }
 742 abort:
 743         kfree(req_task);
 744         kfree(outbuf);
 745         kfree(inbuf);
 746
 747 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 748
 749         return err;
 750 }
 751 #endif
 752
 753 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 754 {
 755         u8 *buf = NULL;
 756         int bufsize = 0, err = 0;
 757         u8 args[4], xfer_rate = 0;
 758         ide_task_t tfargs;
 759         struct ide_taskfile *tf = &tfargs.tf;
 760
 761         if (NULL == (void *) arg) {
 762                 struct request rq;
 763
 764                 ide_init_drive_cmd(&rq);
 765                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 766
 767                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 768         }
 769
 770         if (copy_from_user(args, (void __user *)arg, 4))
 771                 return -EFAULT;
 772
 773         memset(&tfargs, 0, sizeof(ide_task_t));
 774         tf->feature = args[2];
 775         if (args[0] == WIN_SMART) {
 776                 tf->nsect = args[3];
 777                 tf->lbal  = args[1];
 778                 tf->lbam  = 0x4f;
 779                 tf->lbah  = 0xc2;
 780                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 781         } else {
 782                 tf->nsect = args[1];
 783                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 784                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 785         }
 786         tf->command = args[0];
 787         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 788
 789         if (args[3]) {
 790                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 791                 bufsize = SECTOR_WORDS * 4 * args[3];
 792                 buf = kzalloc(bufsize, GFP_KERNEL);
 793                 if (buf == NULL)
 794                         return -ENOMEM;
 795         }
 796
 797         if (set_transfer(drive, &tfargs)) {
 798                 xfer_rate = args[1];
 799                 if (ide_ata66_check(drive, &tfargs))
 800                         goto abort;
 801         }
 802
 803         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 804
 805         args[0] = tf->status;
 806         args[1] = tf->error;
 807         args[2] = tf->nsect;
 808
 809         if (!err && xfer_rate) {
 810                 /* active-retuning-calls future */
 811                 ide_set_xfer_rate(drive, xfer_rate);
 812                 ide_driveid_update(drive);
 813         }
 814 abort:
 815         if (copy_to_user((void __user *)arg, &args, 4))
 816                 err = -EFAULT;
 817         if (buf) {
 818                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 819                         err = -EFAULT;
 820                 kfree(buf);
 821         }
 822         return err;
 823 }
 824
 825 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 826 {
 827         void __user *p = (void __user *)arg;
 828         int err = 0;
 829         u8 args[7];
 830         ide_task_t task;
 831
 832         if (copy_from_user(args, p, 7))
 833                 return -EFAULT;
 834
 835         memset(&task, 0, sizeof(task));
 836         memcpy(&task.tf_array[7], &args[1], 6);
 837         task.tf.command = args[0];
 838         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 839
 840         err = ide_no_data_taskfile(drive, &task);
 841
 842         args[0] = task.tf.command;
 843         memcpy(&args[1], &task.tf_array[7], 6);
 844
 845         if (copy_to_user(p, args, 7))
 846                 err = -EFAULT;
 847
 848         return err;
 849 }