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          Bartlomiej Zolnierkiewicz
   9  *
  10  *  The big the bad and the ugly.
  11  *
  12  *  Problems to be fixed because of BH interface or the lack therefore.
  13  *
  14  *  Fill me in stupid !!!
  15  *
  16  *  HOST:
  17  *      General refers to the Controller and Driver "pair".
  18  *  DATA HANDLER:
  19  *      Under the context of Linux it generally refers to an interrupt handler.
  20  *      However, it correctly describes the 'HOST'
  21  *  DATA BLOCK:
  22  *      The amount of data needed to be transfered as predefined in the
  23  *      setup of the device.
  24  *  STORAGE ATOMIC:
  25  *      The 'DATA BLOCK' associated to the 'DATA HANDLER', and can be as
  26  *      small as a single sector or as large as the entire command block
  27  *      request.
  28  */
  29
  30 #include <linux/config.h>
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/string.h>
  34 #include <linux/kernel.h>
  35 #include <linux/timer.h>
  36 #include <linux/mm.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/major.h>
  39 #include <linux/errno.h>
  40 #include <linux/genhd.h>
  41 #include <linux/blkpg.h>
  42 #include <linux/slab.h>
  43 #include <linux/pci.h>
  44 #include <linux/delay.h>
  45 #include <linux/hdreg.h>
  46 #include <linux/ide.h>
  47
  48 #include <asm/byteorder.h>
  49 #include <asm/irq.h>
  50 #include <asm/uaccess.h>
  51 #include <asm/io.h>
  52 #include <asm/bitops.h>
  53
  54 #define DEBUG_TASKFILE  0       /* unset when fixed */
  55
  56 static void ata_bswap_data (void *buffer, int wcount)
  57 {
  58         u16 *p = buffer;
  59
  60         while (wcount--) {
  61                 *p = *p << 8 | *p >> 8; p++;
  62                 *p = *p << 8 | *p >> 8; p++;
  63         }
  64 }
  65
  66
  67 void taskfile_input_data (ide_drive_t *drive, void *buffer, u32 wcount)
  68 {
  69         HWIF(drive)->ata_input_data(drive, buffer, wcount);
  70         if (drive->bswap)
  71                 ata_bswap_data(buffer, wcount);
  72 }
  73
  74 EXPORT_SYMBOL(taskfile_input_data);
  75
  76 void taskfile_output_data (ide_drive_t *drive, void *buffer, u32 wcount)
  77 {
  78         if (drive->bswap) {
  79                 ata_bswap_data(buffer, wcount);
  80                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  81                 ata_bswap_data(buffer, wcount);
  82         } else {
  83                 HWIF(drive)->ata_output_data(drive, buffer, wcount);
  84         }
  85 }
  86
  87 EXPORT_SYMBOL(taskfile_output_data);
  88
  89 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  90 {
  91         ide_task_t args;
  92         memset(&args, 0, sizeof(ide_task_t));
  93         args.tfRegister[IDE_NSECTOR_OFFSET]     = 0x01;
  94         if (drive->media == ide_disk)
  95                 args.tfRegister[IDE_COMMAND_OFFSET]     = WIN_IDENTIFY;
  96         else
  97                 args.tfRegister[IDE_COMMAND_OFFSET]     = WIN_PIDENTIFY;
  98         args.command_type = IDE_DRIVE_TASK_IN;
  99         args.data_phase   = TASKFILE_IN;
 100         args.handler      = &task_in_intr;
 101         return ide_raw_taskfile(drive, &args, buf);
 102 }
 103
 104 EXPORT_SYMBOL(taskfile_lib_get_identify);
 105
 106 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 107 {
 108         ide_hwif_t *hwif        = HWIF(drive);
 109         task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
 110         hob_struct_t *hobfile   = (hob_struct_t *) task->hobRegister;
 111         u8 HIHI                 = (drive->addressing == 1) ? 0xE0 : 0xEF;
 112
 113         /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
 114         if (IDE_CONTROL_REG) {
 115                 /* clear nIEN */
 116                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
 117         }
 118         SELECT_MASK(drive, 0);
 119
 120         if (drive->addressing == 1) {
 121                 hwif->OUTB(hobfile->feature, IDE_FEATURE_REG);
 122                 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
 123                 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
 124                 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
 125                 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
 126         }
 127
 128         hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
 129         hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
 130         hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
 131         hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
 132         hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
 133
 134         hwif->OUTB((taskfile->device_head & HIHI) | drive->select.all, IDE_SELECT_REG);
 135
 136         if (task->handler != NULL) {
 137                 if (task->prehandler != NULL) {
 138                         hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
 139                         ndelay(400);    /* FIXME */
 140                         return task->prehandler(drive, task->rq);
 141                 }
 142                 ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
 143                 return ide_started;
 144         }
 145
 146         if (!drive->using_dma)
 147                 return ide_stopped;
 148
 149         switch (taskfile->command) {
 150                 case WIN_WRITEDMA_ONCE:
 151                 case WIN_WRITEDMA:
 152                 case WIN_WRITEDMA_EXT:
 153                         if (!hwif->ide_dma_write(drive))
 154                                 return ide_started;
 155                         break;
 156                 case WIN_READDMA_ONCE:
 157                 case WIN_READDMA:
 158                 case WIN_READDMA_EXT:
 159                 case WIN_IDENTIFY_DMA:
 160                         if (!hwif->ide_dma_read(drive))
 161                                 return ide_started;
 162                         break;
 163                 default:
 164                         if (task->handler == NULL)
 165                                 return ide_stopped;
 166         }
 167
 168         return ide_stopped;
 169 }
 170
 171 EXPORT_SYMBOL(do_rw_taskfile);
 172
 173 /*
 174  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 175  */
 176 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 177 {
 178         ide_hwif_t *hwif = HWIF(drive);
 179         u8 stat;
 180
 181         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 182                 drive->mult_count = drive->mult_req;
 183         } else {
 184                 drive->mult_req = drive->mult_count = 0;
 185                 drive->special.b.recalibrate = 1;
 186                 (void) ide_dump_status(drive, "set_multmode", stat);
 187         }
 188         return ide_stopped;
 189 }
 190
 191 EXPORT_SYMBOL(set_multmode_intr);
 192
 193 /*
 194  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 195  */
 196 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 197 {
 198         ide_hwif_t *hwif = HWIF(drive);
 199         int retries = 5;
 200         u8 stat;
 201
 202         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 203                 udelay(10);
 204
 205         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 206                 return ide_stopped;
 207
 208         if (stat & (ERR_STAT|DRQ_STAT))
 209                 return DRIVER(drive)->error(drive, "set_geometry_intr", stat);
 210
 211         if (HWGROUP(drive)->handler != NULL)
 212                 BUG();
 213         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 214         return ide_started;
 215 }
 216
 217 EXPORT_SYMBOL(set_geometry_intr);
 218
 219 /*
 220  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 221  */
 222 ide_startstop_t recal_intr (ide_drive_t *drive)
 223 {
 224         ide_hwif_t *hwif = HWIF(drive);
 225         u8 stat;
 226
 227         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 228                 return DRIVER(drive)->error(drive, "recal_intr", stat);
 229         return ide_stopped;
 230 }
 231
 232 EXPORT_SYMBOL(recal_intr);
 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();
 244         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 245                 return DRIVER(drive)->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 EXPORT_SYMBOL(task_no_data_intr);
 255
 256 static void task_buffer_sectors(ide_drive_t *drive, struct request *rq,
 257                                 unsigned nsect, unsigned rw)
 258 {
 259         char *buf = rq->buffer + blk_rq_offset(rq);
 260
 261         rq->sector += nsect;
 262         rq->current_nr_sectors -= nsect;
 263         rq->nr_sectors -= nsect;
 264         __task_sectors(drive, buf, nsect, rw);
 265 }
 266
 267 static inline void task_buffer_multi_sectors(ide_drive_t *drive,
 268                                              struct request *rq, unsigned rw)
 269 {
 270         unsigned int msect = drive->mult_count, nsect;
 271
 272         nsect = rq->current_nr_sectors;
 273         if (nsect > msect)
 274                 nsect = msect;
 275
 276         task_buffer_sectors(drive, rq, nsect, rw);
 277 }
 278
 279 #ifdef CONFIG_IDE_TASKFILE_IO
 280 static void task_sectors(ide_drive_t *drive, struct request *rq,
 281                          unsigned nsect, unsigned rw)
 282 {
 283         if (rq->cbio) { /* fs request */
 284                 rq->errors = 0;
 285                 task_bio_sectors(drive, rq, nsect, rw);
 286         } else          /* task request */
 287                 task_buffer_sectors(drive, rq, nsect, rw);
 288 }
 289
 290 static inline void task_bio_multi_sectors(ide_drive_t *drive,
 291                                           struct request *rq, unsigned rw)
 292 {
 293         unsigned int nsect, msect = drive->mult_count;
 294
 295         do {
 296                 nsect = rq->current_nr_sectors;
 297                 if (nsect > msect)
 298                         nsect = msect;
 299
 300                 task_bio_sectors(drive, rq, nsect, rw);
 301
 302                 if (!rq->nr_sectors)
 303                         msect = 0;
 304                 else
 305                         msect -= nsect;
 306         } while (msect);
 307 }
 308
 309 static void task_multi_sectors(ide_drive_t *drive,
 310                                struct request *rq, unsigned rw)
 311 {
 312         if (rq->cbio) { /* fs request */
 313                 rq->errors = 0;
 314                 task_bio_multi_sectors(drive, rq, rw);
 315         } else          /* task request */
 316                 task_buffer_multi_sectors(drive, rq, rw);
 317 }
 318 #else
 319 # define task_sectors(d, rq, nsect, rw) task_buffer_sectors(d, rq, nsect, rw)
 320 # define task_multi_sectors(d, rq, rw)  task_buffer_multi_sectors(d, rq, rw)
 321 #endif /* CONFIG_IDE_TASKFILE_IO */
 322
 323 static u8 wait_drive_not_busy(ide_drive_t *drive)
 324 {
 325         ide_hwif_t *hwif = HWIF(drive);
 326         int retries = 100;
 327         u8 stat;
 328
 329         /*
 330          * Last sector was transfered, wait until drive is ready.
 331          * This can take up to 10 usec, but we will wait max 1 ms
 332          * (drive_cmd_intr() waits that long).
 333          */
 334         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 335                 udelay(10);
 336
 337         if (!retries)
 338                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 339
 340         return stat;
 341 }
 342
 343 static inline void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 344                                      unsigned int write)
 345 {
 346         switch (drive->hwif->data_phase) {
 347         case TASKFILE_MULTI_IN:
 348         case TASKFILE_MULTI_OUT:
 349                 task_multi_sectors(drive, rq, write);
 350                 break;
 351         default:
 352                 task_sectors(drive, rq, 1, write);
 353                 break;
 354         }
 355 }
 356
 357 #ifdef CONFIG_IDE_TASKFILE_IO
 358 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 359                                   const char *s, u8 stat)
 360 {
 361         if (rq->bio) {
 362                 int sectors = rq->hard_nr_sectors - rq->nr_sectors;
 363
 364                 switch (drive->hwif->data_phase) {
 365                 case TASKFILE_IN:
 366                         if (rq->nr_sectors)
 367                                 break;
 368                         /* fall through */
 369                 case TASKFILE_OUT:
 370                         sectors--;
 371                         break;
 372                 case TASKFILE_MULTI_IN:
 373                         if (rq->nr_sectors)
 374                                 break;
 375                         /* fall through */
 376                 case TASKFILE_MULTI_OUT:
 377                         sectors -= drive->mult_count;
 378                 default:
 379                         break;
 380                 }
 381
 382                 if (sectors > 0)
 383                         drive->driver->end_request(drive, 1, sectors);
 384         }
 385         return drive->driver->error(drive, s, stat);
 386 }
 387 #else
 388 # define task_error(d, rq, s, stat) drive->driver->error(d, s, stat)
 389 #endif
 390
 391 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 392 {
 393         if (rq->flags & REQ_DRIVE_TASKFILE) {
 394                 ide_task_t *task = rq->special;
 395
 396                 if (task->tf_out_flags.all) {
 397                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 398                         ide_end_drive_cmd(drive, stat, err);
 399                         return;
 400                 }
 401         }
 402         drive->driver->end_request(drive, 1, rq->hard_nr_sectors);
 403 }
 404
 405 /*
 406  * Handler for command with PIO data-in phase (Read/Read Multiple).
 407  */
 408 ide_startstop_t task_in_intr (ide_drive_t *drive)
 409 {
 410         struct request *rq = HWGROUP(drive)->rq;
 411         u8 stat = HWIF(drive)->INB(IDE_STATUS_REG);
 412
 413         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 414                 if (stat & (ERR_STAT | DRQ_STAT))
 415                         return task_error(drive, rq, __FUNCTION__, stat);
 416                 /* No data yet, so wait for another IRQ. */
 417                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 418                 return ide_started;
 419         }
 420
 421         ide_pio_datablock(drive, rq, 0);
 422
 423         /* If it was the last datablock check status and finish transfer. */
 424         if (!rq->nr_sectors) {
 425                 stat = wait_drive_not_busy(drive);
 426                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 427                         return task_error(drive, rq, __FUNCTION__, stat);
 428                 task_end_request(drive, rq, stat);
 429                 return ide_stopped;
 430         }
 431
 432         /* Still data left to transfer. */
 433         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 434
 435         return ide_started;
 436 }
 437 EXPORT_SYMBOL(task_in_intr);
 438
 439 /*
 440  * Handler for command with PIO data-out phase (Write/Write Multiple).
 441  */
 442 ide_startstop_t task_out_intr (ide_drive_t *drive)
 443 {
 444         struct request *rq = HWGROUP(drive)->rq;
 445         u8 stat;
 446
 447         stat = HWIF(drive)->INB(IDE_STATUS_REG);
 448         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 449                 return task_error(drive, rq, __FUNCTION__, stat);
 450
 451         /* Deal with unexpected ATA data phase. */
 452         if (((stat & DRQ_STAT) == 0) ^ !rq->nr_sectors)
 453                 return task_error(drive, rq, __FUNCTION__, stat);
 454
 455         if (!rq->nr_sectors) {
 456                 task_end_request(drive, rq, stat);
 457                 return ide_stopped;
 458         }
 459
 460         /* Still data left to transfer. */
 461         ide_pio_datablock(drive, rq, 1);
 462         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 463
 464         return ide_started;
 465 }
 466
 467 EXPORT_SYMBOL(task_out_intr);
 468
 469 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 470 {
 471         ide_startstop_t startstop;
 472
 473         if (ide_wait_stat(&startstop, drive, DATA_READY,
 474                           drive->bad_wstat, WAIT_DRQ)) {
 475                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 476                                 drive->name,
 477                                 drive->hwif->data_phase ? "MULT" : "",
 478                                 drive->addressing ? "_EXT" : "");
 479                 return startstop;
 480         }
 481
 482         if (!drive->unmask)
 483                 local_irq_disable();
 484
 485         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 486         ide_pio_datablock(drive, rq, 1);
 487
 488         return ide_started;
 489 }
 490 EXPORT_SYMBOL(pre_task_out_intr);
 491
 492 int ide_diag_taskfile (ide_drive_t *drive, ide_task_t *args, unsigned long data_size, u8 *buf)
 493 {
 494         struct request rq;
 495
 496         memset(&rq, 0, sizeof(rq));
 497         rq.flags = REQ_DRIVE_TASKFILE;
 498         rq.buffer = buf;
 499
 500         /*
 501          * (ks) We transfer currently only whole sectors.
 502          * This is suffient for now.  But, it would be great,
 503          * if we would find a solution to transfer any size.
 504          * To support special commands like READ LONG.
 505          */
 506         if (args->command_type != IDE_DRIVE_TASK_NO_DATA) {
 507                 if (data_size == 0)
 508                         rq.nr_sectors = (args->hobRegister[IDE_NSECTOR_OFFSET] << 8) | args->tfRegister[IDE_NSECTOR_OFFSET];
 509                 else
 510                         rq.nr_sectors = data_size / SECTOR_SIZE;
 511
 512                 if (!rq.nr_sectors) {
 513                         printk(KERN_ERR "%s: in/out command without data\n",
 514                                         drive->name);
 515                         return -EFAULT;
 516                 }
 517
 518                 rq.hard_nr_sectors = rq.nr_sectors;
 519                 rq.hard_cur_sectors = rq.current_nr_sectors = rq.nr_sectors;
 520         }
 521
 522         rq.special = args;
 523         return ide_do_drive_cmd(drive, &rq, ide_wait);
 524 }
 525
 526 EXPORT_SYMBOL(ide_diag_taskfile);
 527
 528 int ide_raw_taskfile (ide_drive_t *drive, ide_task_t *args, u8 *buf)
 529 {
 530         return ide_diag_taskfile(drive, args, 0, buf);
 531 }
 532
 533 EXPORT_SYMBOL(ide_raw_taskfile);
 534
 535 #define MAX_DMA         (256*SECTOR_WORDS)
 536
 537 ide_startstop_t flagged_taskfile(ide_drive_t *, ide_task_t *);
 538
 539 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 540 {
 541         ide_task_request_t      *req_task;
 542         ide_task_t              args;
 543         u8 *outbuf              = NULL;
 544         u8 *inbuf               = NULL;
 545         task_ioreg_t *argsptr   = args.tfRegister;
 546         task_ioreg_t *hobsptr   = args.hobRegister;
 547         int err                 = 0;
 548         int tasksize            = sizeof(struct ide_task_request_s);
 549         int taskin              = 0;
 550         int taskout             = 0;
 551         u8 io_32bit             = drive->io_32bit;
 552         char __user *buf = (char __user *)arg;
 553
 554 //      printk("IDE Taskfile ...\n");
 555
 556         req_task = kmalloc(tasksize, GFP_KERNEL);
 557         if (req_task == NULL) return -ENOMEM;
 558         memset(req_task, 0, tasksize);
 559         if (copy_from_user(req_task, buf, tasksize)) {
 560                 kfree(req_task);
 561                 return -EFAULT;
 562         }
 563
 564         taskout = (int) req_task->out_size;
 565         taskin  = (int) req_task->in_size;
 566
 567         if (taskout) {
 568                 int outtotal = tasksize;
 569                 outbuf = kmalloc(taskout, GFP_KERNEL);
 570                 if (outbuf == NULL) {
 571                         err = -ENOMEM;
 572                         goto abort;
 573                 }
 574                 memset(outbuf, 0, taskout);
 575                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 576                         err = -EFAULT;
 577                         goto abort;
 578                 }
 579         }
 580
 581         if (taskin) {
 582                 int intotal = tasksize + taskout;
 583                 inbuf = kmalloc(taskin, GFP_KERNEL);
 584                 if (inbuf == NULL) {
 585                         err = -ENOMEM;
 586                         goto abort;
 587                 }
 588                 memset(inbuf, 0, taskin);
 589                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 590                         err = -EFAULT;
 591                         goto abort;
 592                 }
 593         }
 594
 595         memset(&args, 0, sizeof(ide_task_t));
 596         memcpy(argsptr, req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 597         memcpy(hobsptr, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE);
 598
 599         args.tf_in_flags  = req_task->in_flags;
 600         args.tf_out_flags = req_task->out_flags;
 601         args.data_phase   = req_task->data_phase;
 602         args.command_type = req_task->req_cmd;
 603
 604         drive->io_32bit = 0;
 605         switch(req_task->data_phase) {
 606                 case TASKFILE_OUT_DMAQ:
 607                 case TASKFILE_OUT_DMA:
 608                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 609                         break;
 610                 case TASKFILE_IN_DMAQ:
 611                 case TASKFILE_IN_DMA:
 612                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 613                         break;
 614                 case TASKFILE_MULTI_OUT:
 615                         if (!drive->mult_count) {
 616                                 /* (hs): give up if multcount is not set */
 617                                 printk(KERN_ERR "%s: %s Multimode Write " \
 618                                         "multcount is not set\n",
 619                                         drive->name, __FUNCTION__);
 620                                 err = -EPERM;
 621                                 goto abort;
 622                         }
 623                         /* fall through */
 624                 case TASKFILE_OUT:
 625                         args.prehandler = &pre_task_out_intr;
 626                         args.handler = &task_out_intr;
 627                         err = ide_diag_taskfile(drive, &args, taskout, outbuf);
 628                         break;
 629                 case TASKFILE_MULTI_IN:
 630                         if (!drive->mult_count) {
 631                                 /* (hs): give up if multcount is not set */
 632                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 633                                         "multcount is not set\n",
 634                                         drive->name, __FUNCTION__);
 635                                 err = -EPERM;
 636                                 goto abort;
 637                         }
 638                         /* fall through */
 639                 case TASKFILE_IN:
 640                         args.handler = &task_in_intr;
 641                         err = ide_diag_taskfile(drive, &args, taskin, inbuf);
 642                         break;
 643                 case TASKFILE_NO_DATA:
 644                         args.handler = &task_no_data_intr;
 645                         err = ide_diag_taskfile(drive, &args, 0, NULL);
 646                         break;
 647                 default:
 648                         err = -EFAULT;
 649                         goto abort;
 650         }
 651
 652         memcpy(req_task->io_ports, &(args.tfRegister), HDIO_DRIVE_TASK_HDR_SIZE);
 653         memcpy(req_task->hob_ports, &(args.hobRegister), HDIO_DRIVE_HOB_HDR_SIZE);
 654         req_task->in_flags  = args.tf_in_flags;
 655         req_task->out_flags = args.tf_out_flags;
 656
 657         if (copy_to_user(buf, req_task, tasksize)) {
 658                 err = -EFAULT;
 659                 goto abort;
 660         }
 661         if (taskout) {
 662                 int outtotal = tasksize;
 663                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 664                         err = -EFAULT;
 665                         goto abort;
 666                 }
 667         }
 668         if (taskin) {
 669                 int intotal = tasksize + taskout;
 670                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 671                         err = -EFAULT;
 672                         goto abort;
 673                 }
 674         }
 675 abort:
 676         kfree(req_task);
 677         if (outbuf != NULL)
 678                 kfree(outbuf);
 679         if (inbuf != NULL)
 680                 kfree(inbuf);
 681
 682 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 683
 684         drive->io_32bit = io_32bit;
 685
 686         return err;
 687 }
 688
 689 EXPORT_SYMBOL(ide_taskfile_ioctl);
 690
 691 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 692 {
 693         struct request rq;
 694         u8 buffer[4];
 695
 696         if (!buf)
 697                 buf = buffer;
 698         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 699         ide_init_drive_cmd(&rq);
 700         rq.buffer = buf;
 701         *buf++ = cmd;
 702         *buf++ = nsect;
 703         *buf++ = feature;
 704         *buf++ = sectors;
 705         return ide_do_drive_cmd(drive, &rq, ide_wait);
 706 }
 707
 708 EXPORT_SYMBOL(ide_wait_cmd);
 709
 710 /*
 711  * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
 712  */
 713 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 714 {
 715         int err = 0;
 716         u8 args[4], *argbuf = args;
 717         u8 xfer_rate = 0;
 718         int argsize = 4;
 719         ide_task_t tfargs;
 720
 721         if (NULL == (void *) arg) {
 722                 struct request rq;
 723                 ide_init_drive_cmd(&rq);
 724                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 725         }
 726
 727         if (copy_from_user(args, (void __user *)arg, 4))
 728                 return -EFAULT;
 729
 730         memset(&tfargs, 0, sizeof(ide_task_t));
 731         tfargs.tfRegister[IDE_FEATURE_OFFSET] = args[2];
 732         tfargs.tfRegister[IDE_NSECTOR_OFFSET] = args[3];
 733         tfargs.tfRegister[IDE_SECTOR_OFFSET]  = args[1];
 734         tfargs.tfRegister[IDE_LCYL_OFFSET]    = 0x00;
 735         tfargs.tfRegister[IDE_HCYL_OFFSET]    = 0x00;
 736         tfargs.tfRegister[IDE_SELECT_OFFSET]  = 0x00;
 737         tfargs.tfRegister[IDE_COMMAND_OFFSET] = args[0];
 738
 739         if (args[3]) {
 740                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 741                 argbuf = kmalloc(argsize, GFP_KERNEL);
 742                 if (argbuf == NULL)
 743                         return -ENOMEM;
 744                 memcpy(argbuf, args, 4);
 745         }
 746         if (set_transfer(drive, &tfargs)) {
 747                 xfer_rate = args[1];
 748                 if (ide_ata66_check(drive, &tfargs))
 749                         goto abort;
 750         }
 751
 752         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 753
 754         if (!err && xfer_rate) {
 755                 /* active-retuning-calls future */
 756                 ide_set_xfer_rate(drive, xfer_rate);
 757                 ide_driveid_update(drive);
 758         }
 759 abort:
 760         if (copy_to_user((void __user *)arg, argbuf, argsize))
 761                 err = -EFAULT;
 762         if (argsize > 4)
 763                 kfree(argbuf);
 764         return err;
 765 }
 766
 767 EXPORT_SYMBOL(ide_cmd_ioctl);
 768
 769 int ide_wait_cmd_task (ide_drive_t *drive, u8 *buf)
 770 {
 771         struct request rq;
 772
 773         ide_init_drive_cmd(&rq);
 774         rq.flags = REQ_DRIVE_TASK;
 775         rq.buffer = buf;
 776         return ide_do_drive_cmd(drive, &rq, ide_wait);
 777 }
 778
 779 EXPORT_SYMBOL(ide_wait_cmd_task);
 780
 781 /*
 782  * FIXME : this needs to map into at taskfile. <andre@linux-ide.org>
 783  */
 784 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 785 {
 786         void __user *p = (void __user *)arg;
 787         int err = 0;
 788         u8 args[7], *argbuf = args;
 789         int argsize = 7;
 790
 791         if (copy_from_user(args, p, 7))
 792                 return -EFAULT;
 793         err = ide_wait_cmd_task(drive, argbuf);
 794         if (copy_to_user(p, argbuf, argsize))
 795                 err = -EFAULT;
 796         return err;
 797 }
 798
 799 EXPORT_SYMBOL(ide_task_ioctl);
 800
 801 /*
 802  * NOTICE: This is additions from IBM to provide a discrete interface,
 803  * for selective taskregister access operations.  Nice JOB Klaus!!!
 804  * Glad to be able to work and co-develop this with you and IBM.
 805  */
 806 ide_startstop_t flagged_taskfile (ide_drive_t *drive, ide_task_t *task)
 807 {
 808         ide_hwif_t *hwif        = HWIF(drive);
 809         task_struct_t *taskfile = (task_struct_t *) task->tfRegister;
 810         hob_struct_t *hobfile   = (hob_struct_t *) task->hobRegister;
 811 #if DEBUG_TASKFILE
 812         u8 status;
 813 #endif
 814
 815         if (task->data_phase == TASKFILE_MULTI_IN ||
 816             task->data_phase == TASKFILE_MULTI_OUT) {
 817                 if (!drive->mult_count) {
 818                         printk(KERN_ERR "%s: multimode not set!\n", drive->name);
 819                         return ide_stopped;
 820                 }
 821         }
 822
 823         /*
 824          * (ks) Check taskfile in/out flags.
 825          * If set, then execute as it is defined.
 826          * If not set, then define default settings.
 827          * The default values are:
 828          *      write and read all taskfile registers (except data)
 829          *      write and read the hob registers (sector,nsector,lcyl,hcyl)
 830          */
 831         if (task->tf_out_flags.all == 0) {
 832                 task->tf_out_flags.all = IDE_TASKFILE_STD_OUT_FLAGS;
 833                 if (drive->addressing == 1)
 834                         task->tf_out_flags.all |= (IDE_HOB_STD_OUT_FLAGS << 8);
 835         }
 836
 837         if (task->tf_in_flags.all == 0) {
 838                 task->tf_in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 839                 if (drive->addressing == 1)
 840                         task->tf_in_flags.all |= (IDE_HOB_STD_IN_FLAGS  << 8);
 841         }
 842
 843         /* ALL Command Block Executions SHALL clear nIEN, unless otherwise */
 844         if (IDE_CONTROL_REG)
 845                 /* clear nIEN */
 846                 hwif->OUTB(drive->ctl, IDE_CONTROL_REG);
 847         SELECT_MASK(drive, 0);
 848
 849 #if DEBUG_TASKFILE
 850         status = hwif->INB(IDE_STATUS_REG);
 851         if (status & 0x80) {
 852                 printk("flagged_taskfile -> Bad status. Status = %02x. wait 100 usec ...\n", status);
 853                 udelay(100);
 854                 status = hwif->INB(IDE_STATUS_REG);
 855                 printk("flagged_taskfile -> Status = %02x\n", status);
 856         }
 857 #endif
 858
 859         if (task->tf_out_flags.b.data) {
 860                 u16 data =  taskfile->data + (hobfile->data << 8);
 861                 hwif->OUTW(data, IDE_DATA_REG);
 862         }
 863
 864         /* (ks) send hob registers first */
 865         if (task->tf_out_flags.b.nsector_hob)
 866                 hwif->OUTB(hobfile->sector_count, IDE_NSECTOR_REG);
 867         if (task->tf_out_flags.b.sector_hob)
 868                 hwif->OUTB(hobfile->sector_number, IDE_SECTOR_REG);
 869         if (task->tf_out_flags.b.lcyl_hob)
 870                 hwif->OUTB(hobfile->low_cylinder, IDE_LCYL_REG);
 871         if (task->tf_out_flags.b.hcyl_hob)
 872                 hwif->OUTB(hobfile->high_cylinder, IDE_HCYL_REG);
 873
 874         /* (ks) Send now the standard registers */
 875         if (task->tf_out_flags.b.error_feature)
 876                 hwif->OUTB(taskfile->feature, IDE_FEATURE_REG);
 877         /* refers to number of sectors to transfer */
 878         if (task->tf_out_flags.b.nsector)
 879                 hwif->OUTB(taskfile->sector_count, IDE_NSECTOR_REG);
 880         /* refers to sector offset or start sector */
 881         if (task->tf_out_flags.b.sector)
 882                 hwif->OUTB(taskfile->sector_number, IDE_SECTOR_REG);
 883         if (task->tf_out_flags.b.lcyl)
 884                 hwif->OUTB(taskfile->low_cylinder, IDE_LCYL_REG);
 885         if (task->tf_out_flags.b.hcyl)
 886                 hwif->OUTB(taskfile->high_cylinder, IDE_HCYL_REG);
 887
 888         /*
 889          * (ks) In the flagged taskfile approch, we will used all specified
 890          * registers and the register value will not be changed. Except the
 891          * select bit (master/slave) in the drive_head register. We must make
 892          * sure that the desired drive is selected.
 893          */
 894         hwif->OUTB(taskfile->device_head | drive->select.all, IDE_SELECT_REG);
 895         switch(task->data_phase) {
 896
 897                 case TASKFILE_OUT_DMAQ:
 898                 case TASKFILE_OUT_DMA:
 899                         hwif->ide_dma_write(drive);
 900                         break;
 901
 902                 case TASKFILE_IN_DMAQ:
 903                 case TASKFILE_IN_DMA:
 904                         hwif->ide_dma_read(drive);
 905                         break;
 906
 907                 default:
 908                         if (task->handler == NULL)
 909                                 return ide_stopped;
 910
 911                         /* Issue the command */
 912                         if (task->prehandler) {
 913                                 hwif->OUTBSYNC(drive, taskfile->command, IDE_COMMAND_REG);
 914                                 ndelay(400);    /* FIXME */
 915                                 return task->prehandler(drive, task->rq);
 916                         }
 917                         ide_execute_command(drive, taskfile->command, task->handler, WAIT_WORSTCASE, NULL);
 918         }
 919
 920         return ide_started;
 921 }
 922
 923 EXPORT_SYMBOL(flagged_taskfile);