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