git.oblomov.eu Git - linux-2.6/blob - drivers/ide/ide-taskfile.c

   1 /*
   2  *  Copyright (C) 2000-2002        Michael Cornwell <cornwell@acm.org>
   3  *  Copyright (C) 2000-2002        Andre Hedrick <andre@linux-ide.org>
   4  *  Copyright (C) 2001-2002        Klaus Smolin
   5  *                                      IBM Storage Technology Division
   6  *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
   7  *
   8  *  The big the bad and the ugly.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/types.h>
  13 #include <linux/string.h>
  14 #include <linux/kernel.h>
  15 #include <linux/timer.h>
  16 #include <linux/mm.h>
  17 #include <linux/sched.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/major.h>
  20 #include <linux/errno.h>
  21 #include <linux/genhd.h>
  22 #include <linux/blkpg.h>
  23 #include <linux/slab.h>
  24 #include <linux/pci.h>
  25 #include <linux/delay.h>
  26 #include <linux/hdreg.h>
  27 #include <linux/ide.h>
  28 #include <linux/bitops.h>
  29 #include <linux/scatterlist.h>
  30
  31 #include <asm/byteorder.h>
  32 #include <asm/irq.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/io.h>
  35
  36 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  37 {
  38         ide_hwif_t *hwif = drive->hwif;
  39         struct ide_taskfile *tf = &task->tf;
  40         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  41
  42         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  43                 HIHI = 0xFF;
  44
  45 #ifdef DEBUG
  46         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  47                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  48                 drive->name, tf->feature, tf->nsect, tf->lbal,
  49                 tf->lbam, tf->lbah, tf->device, tf->command);
  50         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  51                 "lbam 0x%02x lbah 0x%02x\n",
  52                 drive->name, tf->hob_nsect, tf->hob_lbal,
  53                 tf->hob_lbam, tf->hob_lbah);
  54 #endif
  55
  56         ide_set_irq(drive, 1);
  57
  58         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  59                 SELECT_MASK(drive, 0);
  60
  61         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  62                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  63
  64         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  65                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  67                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  69                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  71                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  73                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  74
  75         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  76                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  77         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  78                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  79         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  80                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
  81         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  82                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
  83         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  84                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
  85
  86         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  87                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
  88 }
  89
  90 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  91 {
  92         ide_task_t args;
  93
  94         memset(&args, 0, sizeof(ide_task_t));
  95         args.tf.nsect = 0x01;
  96         if (drive->media == ide_disk)
  97                 args.tf.command = WIN_IDENTIFY;
  98         else
  99                 args.tf.command = WIN_PIDENTIFY;
 100         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 101         args.data_phase = TASKFILE_IN;
 102         return ide_raw_taskfile(drive, &args, buf, 1);
 103 }
 104
 105 static int inline task_dma_ok(ide_task_t *task)
 106 {
 107         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
 108                 return 1;
 109
 110         switch (task->tf.command) {
 111                 case WIN_WRITEDMA_ONCE:
 112                 case WIN_WRITEDMA:
 113                 case WIN_WRITEDMA_EXT:
 114                 case WIN_READDMA_ONCE:
 115                 case WIN_READDMA:
 116                 case WIN_READDMA_EXT:
 117                 case WIN_IDENTIFY_DMA:
 118                         return 1;
 119         }
 120
 121         return 0;
 122 }
 123
 124 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 125 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 126 static ide_startstop_t recal_intr(ide_drive_t *);
 127 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 128 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 129 static ide_startstop_t task_in_intr(ide_drive_t *);
 130
 131 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 132 {
 133         ide_hwif_t *hwif        = HWIF(drive);
 134         struct ide_taskfile *tf = &task->tf;
 135         ide_handler_t *handler = NULL;
 136
 137         if (task->data_phase == TASKFILE_MULTI_IN ||
 138             task->data_phase == TASKFILE_MULTI_OUT) {
 139                 if (!drive->mult_count) {
 140                         printk(KERN_ERR "%s: multimode not set!\n",
 141                                         drive->name);
 142                         return ide_stopped;
 143                 }
 144         }
 145
 146         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 147                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 148
 149         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 150                 ide_tf_load(drive, task);
 151
 152         switch (task->data_phase) {
 153         case TASKFILE_MULTI_OUT:
 154         case TASKFILE_OUT:
 155                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 156                 ndelay(400);    /* FIXME */
 157                 return pre_task_out_intr(drive, task->rq);
 158         case TASKFILE_MULTI_IN:
 159         case TASKFILE_IN:
 160                 handler = task_in_intr;
 161                 /* fall-through */
 162         case TASKFILE_NO_DATA:
 163                 if (handler == NULL)
 164                         handler = task_no_data_intr;
 165                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 166                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 167                         switch (tf->command) {
 168                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 169                         case WIN_RESTORE: handler = recal_intr;         break;
 170                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 171                         }
 172                 }
 173                 ide_execute_command(drive, tf->command, handler,
 174                                     WAIT_WORSTCASE, NULL);
 175                 return ide_started;
 176         default:
 177                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 178                     hwif->dma_setup(drive))
 179                         return ide_stopped;
 180                 hwif->dma_exec_cmd(drive, tf->command);
 181                 hwif->dma_start(drive);
 182                 return ide_started;
 183         }
 184 }
 185 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 186
 187 /*
 188  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 189  */
 190 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 191 {
 192         u8 stat = ide_read_status(drive);
 193
 194         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 195                 drive->mult_count = drive->mult_req;
 196         else {
 197                 drive->mult_req = drive->mult_count = 0;
 198                 drive->special.b.recalibrate = 1;
 199                 (void) ide_dump_status(drive, "set_multmode", stat);
 200         }
 201         return ide_stopped;
 202 }
 203
 204 /*
 205  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 206  */
 207 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 208 {
 209         int retries = 5;
 210         u8 stat;
 211
 212         while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
 213                 udelay(10);
 214
 215         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 216                 return ide_stopped;
 217
 218         if (stat & (ERR_STAT|DRQ_STAT))
 219                 return ide_error(drive, "set_geometry_intr", stat);
 220
 221         BUG_ON(HWGROUP(drive)->handler != NULL);
 222         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 223         return ide_started;
 224 }
 225
 226 /*
 227  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 228  */
 229 static ide_startstop_t recal_intr(ide_drive_t *drive)
 230 {
 231         u8 stat = ide_read_status(drive);
 232
 233         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 234                 return ide_error(drive, "recal_intr", stat);
 235         return ide_stopped;
 236 }
 237
 238 /*
 239  * Handler for commands without a data phase
 240  */
 241 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 242 {
 243         ide_task_t *args        = HWGROUP(drive)->rq->special;
 244         u8 stat;
 245
 246         local_irq_enable_in_hardirq();
 247         stat = ide_read_status(drive);
 248
 249         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 250                 return ide_error(drive, "task_no_data_intr", stat);
 251                 /* calls ide_end_drive_cmd */
 252
 253         if (args)
 254                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 255
 256         return ide_stopped;
 257 }
 258
 259 static u8 wait_drive_not_busy(ide_drive_t *drive)
 260 {
 261         int retries;
 262         u8 stat;
 263
 264         /*
 265          * Last sector was transfered, wait until drive is ready.
 266          * This can take up to 10 usec, but we will wait max 1 ms.
 267          */
 268         for (retries = 0; retries < 100; retries++) {
 269                 stat = ide_read_status(drive);
 270
 271                 if (stat & BUSY_STAT)
 272                         udelay(10);
 273                 else
 274                         break;
 275         }
 276
 277         if (stat & BUSY_STAT)
 278                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 279
 280         return stat;
 281 }
 282
 283 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 284 {
 285         ide_hwif_t *hwif = drive->hwif;
 286         struct scatterlist *sg = hwif->sg_table;
 287         struct scatterlist *cursg = hwif->cursg;
 288         struct page *page;
 289 #ifdef CONFIG_HIGHMEM
 290         unsigned long flags;
 291 #endif
 292         unsigned int offset;
 293         u8 *buf;
 294
 295         cursg = hwif->cursg;
 296         if (!cursg) {
 297                 cursg = sg;
 298                 hwif->cursg = sg;
 299         }
 300
 301         page = sg_page(cursg);
 302         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 303
 304         /* get the current page and offset */
 305         page = nth_page(page, (offset >> PAGE_SHIFT));
 306         offset %= PAGE_SIZE;
 307
 308 #ifdef CONFIG_HIGHMEM
 309         local_irq_save(flags);
 310 #endif
 311         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 312
 313         hwif->nleft--;
 314         hwif->cursg_ofs++;
 315
 316         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 317                 hwif->cursg = sg_next(hwif->cursg);
 318                 hwif->cursg_ofs = 0;
 319         }
 320
 321         /* do the actual data transfer */
 322         if (write)
 323                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
 324         else
 325                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
 326
 327         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 328 #ifdef CONFIG_HIGHMEM
 329         local_irq_restore(flags);
 330 #endif
 331 }
 332
 333 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 334 {
 335         unsigned int nsect;
 336
 337         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 338         while (nsect--)
 339                 ide_pio_sector(drive, write);
 340 }
 341
 342 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 343                                      unsigned int write)
 344 {
 345         u8 saved_io_32bit = drive->io_32bit;
 346
 347         if (rq->bio)    /* fs request */
 348                 rq->errors = 0;
 349
 350         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 351                 ide_task_t *task = rq->special;
 352
 353                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 354                         drive->io_32bit = 0;
 355         }
 356
 357         touch_softlockup_watchdog();
 358
 359         switch (drive->hwif->data_phase) {
 360         case TASKFILE_MULTI_IN:
 361         case TASKFILE_MULTI_OUT:
 362                 ide_pio_multi(drive, write);
 363                 break;
 364         default:
 365                 ide_pio_sector(drive, write);
 366                 break;
 367         }
 368
 369         drive->io_32bit = saved_io_32bit;
 370 }
 371
 372 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 373                                   const char *s, u8 stat)
 374 {
 375         if (rq->bio) {
 376                 ide_hwif_t *hwif = drive->hwif;
 377                 int sectors = hwif->nsect - hwif->nleft;
 378
 379                 switch (hwif->data_phase) {
 380                 case TASKFILE_IN:
 381                         if (hwif->nleft)
 382                                 break;
 383                         /* fall through */
 384                 case TASKFILE_OUT:
 385                         sectors--;
 386                         break;
 387                 case TASKFILE_MULTI_IN:
 388                         if (hwif->nleft)
 389                                 break;
 390                         /* fall through */
 391                 case TASKFILE_MULTI_OUT:
 392                         sectors -= drive->mult_count;
 393                 default:
 394                         break;
 395                 }
 396
 397                 if (sectors > 0) {
 398                         ide_driver_t *drv;
 399
 400                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 401                         drv->end_request(drive, 1, sectors);
 402                 }
 403         }
 404         return ide_error(drive, s, stat);
 405 }
 406
 407 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 408 {
 409         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 410                 u8 err = ide_read_error(drive);
 411
 412                 ide_end_drive_cmd(drive, stat, err);
 413                 return;
 414         }
 415
 416         if (rq->rq_disk) {
 417                 ide_driver_t *drv;
 418
 419                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 420                 drv->end_request(drive, 1, rq->nr_sectors);
 421         } else
 422                 ide_end_request(drive, 1, rq->nr_sectors);
 423 }
 424
 425 /*
 426  * We got an interrupt on a task_in case, but no errors and no DRQ.
 427  *
 428  * It might be a spurious irq (shared irq), but it might be a
 429  * command that had no output.
 430  */
 431 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 432 {
 433         /* Command all done? */
 434         if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
 435                 task_end_request(drive, rq, stat);
 436                 return ide_stopped;
 437         }
 438
 439         /* Assume it was a spurious irq */
 440         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 441         return ide_started;
 442 }
 443
 444 /*
 445  * Handler for command with PIO data-in phase (Read/Read Multiple).
 446  */
 447 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 448 {
 449         ide_hwif_t *hwif = drive->hwif;
 450         struct request *rq = HWGROUP(drive)->rq;
 451         u8 stat = ide_read_status(drive);
 452
 453         /* Error? */
 454         if (stat & ERR_STAT)
 455                 return task_error(drive, rq, __FUNCTION__, stat);
 456
 457         /* Didn't want any data? Odd. */
 458         if (!(stat & DRQ_STAT))
 459                 return task_in_unexpected(drive, rq, stat);
 460
 461         ide_pio_datablock(drive, rq, 0);
 462
 463         /* Are we done? Check status and finish transfer. */
 464         if (!hwif->nleft) {
 465                 stat = wait_drive_not_busy(drive);
 466                 if (!OK_STAT(stat, 0, BAD_STAT))
 467                         return task_error(drive, rq, __FUNCTION__, stat);
 468                 task_end_request(drive, rq, stat);
 469                 return ide_stopped;
 470         }
 471
 472         /* Still data left to transfer. */
 473         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 474
 475         return ide_started;
 476 }
 477
 478 /*
 479  * Handler for command with PIO data-out phase (Write/Write Multiple).
 480  */
 481 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 482 {
 483         ide_hwif_t *hwif = drive->hwif;
 484         struct request *rq = HWGROUP(drive)->rq;
 485         u8 stat = ide_read_status(drive);
 486
 487         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 488                 return task_error(drive, rq, __FUNCTION__, stat);
 489
 490         /* Deal with unexpected ATA data phase. */
 491         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 492                 return task_error(drive, rq, __FUNCTION__, stat);
 493
 494         if (!hwif->nleft) {
 495                 task_end_request(drive, rq, stat);
 496                 return ide_stopped;
 497         }
 498
 499         /* Still data left to transfer. */
 500         ide_pio_datablock(drive, rq, 1);
 501         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 502
 503         return ide_started;
 504 }
 505
 506 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 507 {
 508         ide_startstop_t startstop;
 509
 510         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 511                           drive->bad_wstat, WAIT_DRQ)) {
 512                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 513                                 drive->name,
 514                                 drive->hwif->data_phase ? "MULT" : "",
 515                                 drive->addressing ? "_EXT" : "");
 516                 return startstop;
 517         }
 518
 519         if (!drive->unmask)
 520                 local_irq_disable();
 521
 522         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 523         ide_pio_datablock(drive, rq, 1);
 524
 525         return ide_started;
 526 }
 527
 528 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 529 {
 530         struct request rq;
 531
 532         memset(&rq, 0, sizeof(rq));
 533         rq.ref_count = 1;
 534         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 535         rq.buffer = buf;
 536
 537         /*
 538          * (ks) We transfer currently only whole sectors.
 539          * This is suffient for now.  But, it would be great,
 540          * if we would find a solution to transfer any size.
 541          * To support special commands like READ LONG.
 542          */
 543         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 544         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 545
 546         if (task->tf_flags & IDE_TFLAG_WRITE)
 547                 rq.cmd_flags |= REQ_RW;
 548
 549         rq.special = task;
 550         task->rq = &rq;
 551
 552         return ide_do_drive_cmd(drive, &rq, ide_wait);
 553 }
 554
 555 EXPORT_SYMBOL(ide_raw_taskfile);
 556
 557 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 558 {
 559         task->data_phase = TASKFILE_NO_DATA;
 560
 561         return ide_raw_taskfile(drive, task, NULL, 0);
 562 }
 563 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 564
 565 #ifdef CONFIG_IDE_TASK_IOCTL
 566 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 567 {
 568         ide_task_request_t      *req_task;
 569         ide_task_t              args;
 570         u8 *outbuf              = NULL;
 571         u8 *inbuf               = NULL;
 572         u8 *data_buf            = NULL;
 573         int err                 = 0;
 574         int tasksize            = sizeof(struct ide_task_request_s);
 575         unsigned int taskin     = 0;
 576         unsigned int taskout    = 0;
 577         u16 nsect               = 0;
 578         char __user *buf = (char __user *)arg;
 579
 580 //      printk("IDE Taskfile ...\n");
 581
 582         req_task = kzalloc(tasksize, GFP_KERNEL);
 583         if (req_task == NULL) return -ENOMEM;
 584         if (copy_from_user(req_task, buf, tasksize)) {
 585                 kfree(req_task);
 586                 return -EFAULT;
 587         }
 588
 589         taskout = req_task->out_size;
 590         taskin  = req_task->in_size;
 591
 592         if (taskin > 65536 || taskout > 65536) {
 593                 err = -EINVAL;
 594                 goto abort;
 595         }
 596
 597         if (taskout) {
 598                 int outtotal = tasksize;
 599                 outbuf = kzalloc(taskout, GFP_KERNEL);
 600                 if (outbuf == NULL) {
 601                         err = -ENOMEM;
 602                         goto abort;
 603                 }
 604                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 605                         err = -EFAULT;
 606                         goto abort;
 607                 }
 608         }
 609
 610         if (taskin) {
 611                 int intotal = tasksize + taskout;
 612                 inbuf = kzalloc(taskin, GFP_KERNEL);
 613                 if (inbuf == NULL) {
 614                         err = -ENOMEM;
 615                         goto abort;
 616                 }
 617                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 618                         err = -EFAULT;
 619                         goto abort;
 620                 }
 621         }
 622
 623         memset(&args, 0, sizeof(ide_task_t));
 624
 625         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 626         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 627
 628         args.data_phase = req_task->data_phase;
 629
 630         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 631                         IDE_TFLAG_IN_TF;
 632         if (drive->addressing == 1)
 633                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 634
 635         if (req_task->out_flags.all) {
 636                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 637
 638                 if (req_task->out_flags.b.data)
 639                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 640
 641                 if (req_task->out_flags.b.nsector_hob)
 642                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 643                 if (req_task->out_flags.b.sector_hob)
 644                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 645                 if (req_task->out_flags.b.lcyl_hob)
 646                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 647                 if (req_task->out_flags.b.hcyl_hob)
 648                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 649
 650                 if (req_task->out_flags.b.error_feature)
 651                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 652                 if (req_task->out_flags.b.nsector)
 653                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 654                 if (req_task->out_flags.b.sector)
 655                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 656                 if (req_task->out_flags.b.lcyl)
 657                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 658                 if (req_task->out_flags.b.hcyl)
 659                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 660         } else {
 661                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 662                 if (args.tf_flags & IDE_TFLAG_LBA48)
 663                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 664         }
 665
 666         if (req_task->in_flags.b.data)
 667                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 668
 669         switch(req_task->data_phase) {
 670                 case TASKFILE_MULTI_OUT:
 671                         if (!drive->mult_count) {
 672                                 /* (hs): give up if multcount is not set */
 673                                 printk(KERN_ERR "%s: %s Multimode Write " \
 674                                         "multcount is not set\n",
 675                                         drive->name, __FUNCTION__);
 676                                 err = -EPERM;
 677                                 goto abort;
 678                         }
 679                         /* fall through */
 680                 case TASKFILE_OUT:
 681                         /* fall through */
 682                 case TASKFILE_OUT_DMAQ:
 683                 case TASKFILE_OUT_DMA:
 684                         nsect = taskout / SECTOR_SIZE;
 685                         data_buf = outbuf;
 686                         break;
 687                 case TASKFILE_MULTI_IN:
 688                         if (!drive->mult_count) {
 689                                 /* (hs): give up if multcount is not set */
 690                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 691                                         "multcount is not set\n",
 692                                         drive->name, __FUNCTION__);
 693                                 err = -EPERM;
 694                                 goto abort;
 695                         }
 696                         /* fall through */
 697                 case TASKFILE_IN:
 698                         /* fall through */
 699                 case TASKFILE_IN_DMAQ:
 700                 case TASKFILE_IN_DMA:
 701                         nsect = taskin / SECTOR_SIZE;
 702                         data_buf = inbuf;
 703                         break;
 704                 case TASKFILE_NO_DATA:
 705                         break;
 706                 default:
 707                         err = -EFAULT;
 708                         goto abort;
 709         }
 710
 711         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 712                 nsect = 0;
 713         else if (!nsect) {
 714                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 715
 716                 if (!nsect) {
 717                         printk(KERN_ERR "%s: in/out command without data\n",
 718                                         drive->name);
 719                         err = -EFAULT;
 720                         goto abort;
 721                 }
 722         }
 723
 724         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 725                 args.tf_flags |= IDE_TFLAG_WRITE;
 726
 727         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 728
 729         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 730         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 731
 732         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 733             req_task->in_flags.all == 0) {
 734                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 735                 if (drive->addressing == 1)
 736                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 737         }
 738
 739         if (copy_to_user(buf, req_task, tasksize)) {
 740                 err = -EFAULT;
 741                 goto abort;
 742         }
 743         if (taskout) {
 744                 int outtotal = tasksize;
 745                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 746                         err = -EFAULT;
 747                         goto abort;
 748                 }
 749         }
 750         if (taskin) {
 751                 int intotal = tasksize + taskout;
 752                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 753                         err = -EFAULT;
 754                         goto abort;
 755                 }
 756         }
 757 abort:
 758         kfree(req_task);
 759         kfree(outbuf);
 760         kfree(inbuf);
 761
 762 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 763
 764         return err;
 765 }
 766 #endif
 767
 768 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 769 {
 770         u8 *buf = NULL;
 771         int bufsize = 0, err = 0;
 772         u8 args[4], xfer_rate = 0;
 773         ide_task_t tfargs;
 774         struct ide_taskfile *tf = &tfargs.tf;
 775         struct hd_driveid *id = drive->id;
 776
 777         if (NULL == (void *) arg) {
 778                 struct request rq;
 779
 780                 ide_init_drive_cmd(&rq);
 781                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 782
 783                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 784         }
 785
 786         if (copy_from_user(args, (void __user *)arg, 4))
 787                 return -EFAULT;
 788
 789         memset(&tfargs, 0, sizeof(ide_task_t));
 790         tf->feature = args[2];
 791         if (args[0] == WIN_SMART) {
 792                 tf->nsect = args[3];
 793                 tf->lbal  = args[1];
 794                 tf->lbam  = 0x4f;
 795                 tf->lbah  = 0xc2;
 796                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 797         } else {
 798                 tf->nsect = args[1];
 799                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 800                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 801         }
 802         tf->command = args[0];
 803         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 804
 805         if (args[3]) {
 806                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 807                 bufsize = SECTOR_WORDS * 4 * args[3];
 808                 buf = kzalloc(bufsize, GFP_KERNEL);
 809                 if (buf == NULL)
 810                         return -ENOMEM;
 811         }
 812
 813         if (tf->command == WIN_SETFEATURES &&
 814             tf->feature == SETFEATURES_XFER &&
 815             tf->nsect >= XFER_SW_DMA_0 &&
 816             (id->dma_ultra || id->dma_mword || id->dma_1word)) {
 817                 xfer_rate = args[1];
 818                 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 819                         printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 820                                             "be set\n", drive->name);
 821                         goto abort;
 822                 }
 823         }
 824
 825         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 826
 827         args[0] = tf->status;
 828         args[1] = tf->error;
 829         args[2] = tf->nsect;
 830
 831         if (!err && xfer_rate) {
 832                 /* active-retuning-calls future */
 833                 ide_set_xfer_rate(drive, xfer_rate);
 834                 ide_driveid_update(drive);
 835         }
 836 abort:
 837         if (copy_to_user((void __user *)arg, &args, 4))
 838                 err = -EFAULT;
 839         if (buf) {
 840                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 841                         err = -EFAULT;
 842                 kfree(buf);
 843         }
 844         return err;
 845 }
 846
 847 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 848 {
 849         void __user *p = (void __user *)arg;
 850         int err = 0;
 851         u8 args[7];
 852         ide_task_t task;
 853
 854         if (copy_from_user(args, p, 7))
 855                 return -EFAULT;
 856
 857         memset(&task, 0, sizeof(task));
 858         memcpy(&task.tf_array[7], &args[1], 6);
 859         task.tf.command = args[0];
 860         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 861
 862         err = ide_no_data_taskfile(drive, &task);
 863
 864         args[0] = task.tf.command;
 865         memcpy(&args[1], &task.tf_array[7], 6);
 866
 867         if (copy_to_user(p, args, 7))
 868                 err = -EFAULT;
 869
 870         return err;
 871 }