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.tf_flags   = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 130         args.data_phase = TASKFILE_IN;
 131         return ide_raw_taskfile(drive, &args, buf, 1);
 132 }
 133
 134 static int inline task_dma_ok(ide_task_t *task)
 135 {
 136         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 137                 return 1;
 138
 139         switch (task->tf.command) {
 140                 case WIN_WRITEDMA_ONCE:
 141                 case WIN_WRITEDMA:
 142                 case WIN_WRITEDMA_EXT:
 143                 case WIN_READDMA_ONCE:
 144                 case WIN_READDMA:
 145                 case WIN_READDMA_EXT:
 146                 case WIN_IDENTIFY_DMA:
 147                         return 1;
 148         }
 149
 150         return 0;
 151 }
 152
 153 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 154 static ide_startstop_t task_out_intr(ide_drive_t *);
 155
 156 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 157 {
 158         ide_hwif_t *hwif        = HWIF(drive);
 159         struct ide_taskfile *tf = &task->tf;
 160
 161         if (task->data_phase == TASKFILE_MULTI_IN ||
 162             task->data_phase == TASKFILE_MULTI_OUT) {
 163                 if (!drive->mult_count) {
 164                         printk(KERN_ERR "%s: multimode not set!\n",
 165                                         drive->name);
 166                         return ide_stopped;
 167                 }
 168         }
 169
 170         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 171                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 172
 173         ide_tf_load(drive, task);
 174
 175         switch (task->data_phase) {
 176         case TASKFILE_MULTI_OUT:
 177         case TASKFILE_OUT:
 178                 task->handler = task_out_intr;
 179                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 180                 ndelay(400);    /* FIXME */
 181                 return pre_task_out_intr(drive, task->rq);
 182         case TASKFILE_MULTI_IN:
 183         case TASKFILE_IN:
 184                 task->handler = task_in_intr;
 185                 /* fall-through */
 186         case TASKFILE_NO_DATA:
 187                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 188                 if (task->handler == NULL)
 189                         task->handler = task_no_data_intr;
 190                 ide_execute_command(drive, tf->command, task->handler, WAIT_WORSTCASE, NULL);
 191                 return ide_started;
 192         default:
 193                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 194                     hwif->dma_setup(drive))
 195                         return ide_stopped;
 196                 hwif->dma_exec_cmd(drive, tf->command);
 197                 hwif->dma_start(drive);
 198                 return ide_started;
 199         }
 200 }
 201
 202 /*
 203  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 204  */
 205 ide_startstop_t set_multmode_intr (ide_drive_t *drive)
 206 {
 207         ide_hwif_t *hwif = HWIF(drive);
 208         u8 stat;
 209
 210         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 211                 drive->mult_count = drive->mult_req;
 212         } else {
 213                 drive->mult_req = drive->mult_count = 0;
 214                 drive->special.b.recalibrate = 1;
 215                 (void) ide_dump_status(drive, "set_multmode", stat);
 216         }
 217         return ide_stopped;
 218 }
 219
 220 /*
 221  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 222  */
 223 ide_startstop_t set_geometry_intr (ide_drive_t *drive)
 224 {
 225         ide_hwif_t *hwif = HWIF(drive);
 226         int retries = 5;
 227         u8 stat;
 228
 229         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 230                 udelay(10);
 231
 232         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 233                 return ide_stopped;
 234
 235         if (stat & (ERR_STAT|DRQ_STAT))
 236                 return ide_error(drive, "set_geometry_intr", stat);
 237
 238         BUG_ON(HWGROUP(drive)->handler != NULL);
 239         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 240         return ide_started;
 241 }
 242
 243 /*
 244  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 245  */
 246 ide_startstop_t recal_intr (ide_drive_t *drive)
 247 {
 248         ide_hwif_t *hwif = HWIF(drive);
 249         u8 stat;
 250
 251         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 252                 return ide_error(drive, "recal_intr", stat);
 253         return ide_stopped;
 254 }
 255
 256 /*
 257  * Handler for commands without a data phase
 258  */
 259 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 260 {
 261         ide_task_t *args        = HWGROUP(drive)->rq->special;
 262         ide_hwif_t *hwif        = HWIF(drive);
 263         u8 stat;
 264
 265         local_irq_enable_in_hardirq();
 266         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 267                 return ide_error(drive, "task_no_data_intr", stat);
 268                 /* calls ide_end_drive_cmd */
 269         }
 270         if (args)
 271                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 272
 273         return ide_stopped;
 274 }
 275
 276 static u8 wait_drive_not_busy(ide_drive_t *drive)
 277 {
 278         ide_hwif_t *hwif = HWIF(drive);
 279         int retries;
 280         u8 stat;
 281
 282         /*
 283          * Last sector was transfered, wait until drive is ready.
 284          * This can take up to 10 usec, but we will wait max 1 ms
 285          * (drive_cmd_intr() waits that long).
 286          */
 287         for (retries = 0; retries < 100; retries++) {
 288                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 289                         udelay(10);
 290                 else
 291                         break;
 292         }
 293
 294         if (stat & BUSY_STAT)
 295                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 296
 297         return stat;
 298 }
 299
 300 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 301 {
 302         ide_hwif_t *hwif = drive->hwif;
 303         struct scatterlist *sg = hwif->sg_table;
 304         struct scatterlist *cursg = hwif->cursg;
 305         struct page *page;
 306 #ifdef CONFIG_HIGHMEM
 307         unsigned long flags;
 308 #endif
 309         unsigned int offset;
 310         u8 *buf;
 311
 312         cursg = hwif->cursg;
 313         if (!cursg) {
 314                 cursg = sg;
 315                 hwif->cursg = sg;
 316         }
 317
 318         page = sg_page(cursg);
 319         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 320
 321         /* get the current page and offset */
 322         page = nth_page(page, (offset >> PAGE_SHIFT));
 323         offset %= PAGE_SIZE;
 324
 325 #ifdef CONFIG_HIGHMEM
 326         local_irq_save(flags);
 327 #endif
 328         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 329
 330         hwif->nleft--;
 331         hwif->cursg_ofs++;
 332
 333         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 334                 hwif->cursg = sg_next(hwif->cursg);
 335                 hwif->cursg_ofs = 0;
 336         }
 337
 338         /* do the actual data transfer */
 339         if (write)
 340                 taskfile_output_data(drive, buf, SECTOR_WORDS);
 341         else
 342                 taskfile_input_data(drive, buf, SECTOR_WORDS);
 343
 344         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 345 #ifdef CONFIG_HIGHMEM
 346         local_irq_restore(flags);
 347 #endif
 348 }
 349
 350 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 351 {
 352         unsigned int nsect;
 353
 354         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 355         while (nsect--)
 356                 ide_pio_sector(drive, write);
 357 }
 358
 359 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 360                                      unsigned int write)
 361 {
 362         if (rq->bio)    /* fs request */
 363                 rq->errors = 0;
 364
 365         touch_softlockup_watchdog();
 366
 367         switch (drive->hwif->data_phase) {
 368         case TASKFILE_MULTI_IN:
 369         case TASKFILE_MULTI_OUT:
 370                 ide_pio_multi(drive, write);
 371                 break;
 372         default:
 373                 ide_pio_sector(drive, write);
 374                 break;
 375         }
 376 }
 377
 378 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 379                                   const char *s, u8 stat)
 380 {
 381         if (rq->bio) {
 382                 ide_hwif_t *hwif = drive->hwif;
 383                 int sectors = hwif->nsect - hwif->nleft;
 384
 385                 switch (hwif->data_phase) {
 386                 case TASKFILE_IN:
 387                         if (hwif->nleft)
 388                                 break;
 389                         /* fall through */
 390                 case TASKFILE_OUT:
 391                         sectors--;
 392                         break;
 393                 case TASKFILE_MULTI_IN:
 394                         if (hwif->nleft)
 395                                 break;
 396                         /* fall through */
 397                 case TASKFILE_MULTI_OUT:
 398                         sectors -= drive->mult_count;
 399                 default:
 400                         break;
 401                 }
 402
 403                 if (sectors > 0) {
 404                         ide_driver_t *drv;
 405
 406                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 407                         drv->end_request(drive, 1, sectors);
 408                 }
 409         }
 410         return ide_error(drive, s, stat);
 411 }
 412
 413 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 414 {
 415         HWIF(drive)->cursg = NULL;
 416
 417         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 418                 ide_task_t *task = rq->special;
 419
 420                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 421                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 422                         ide_end_drive_cmd(drive, stat, err);
 423                         return;
 424                 }
 425         }
 426
 427         if (rq->rq_disk) {
 428                 ide_driver_t *drv;
 429
 430                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 431                 drv->end_request(drive, 1, rq->hard_nr_sectors);
 432         } else
 433                 ide_end_request(drive, 1, rq->hard_nr_sectors);
 434 }
 435
 436 /*
 437  * Handler for command with PIO data-in phase (Read/Read Multiple).
 438  */
 439 ide_startstop_t task_in_intr (ide_drive_t *drive)
 440 {
 441         ide_hwif_t *hwif = drive->hwif;
 442         struct request *rq = HWGROUP(drive)->rq;
 443         u8 stat = hwif->INB(IDE_STATUS_REG);
 444
 445         /* new way for dealing with premature shared PCI interrupts */
 446         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 447                 if (stat & (ERR_STAT | DRQ_STAT))
 448                         return task_error(drive, rq, __FUNCTION__, stat);
 449                 /* No data yet, so wait for another IRQ. */
 450                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 451                 return ide_started;
 452         }
 453
 454         ide_pio_datablock(drive, rq, 0);
 455
 456         /* If it was the last datablock check status and finish transfer. */
 457         if (!hwif->nleft) {
 458                 stat = wait_drive_not_busy(drive);
 459                 if (!OK_STAT(stat, 0, BAD_R_STAT))
 460                         return task_error(drive, rq, __FUNCTION__, stat);
 461                 task_end_request(drive, rq, stat);
 462                 return ide_stopped;
 463         }
 464
 465         /* Still data left to transfer. */
 466         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 467
 468         return ide_started;
 469 }
 470 EXPORT_SYMBOL(task_in_intr);
 471
 472 /*
 473  * Handler for command with PIO data-out phase (Write/Write Multiple).
 474  */
 475 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 476 {
 477         ide_hwif_t *hwif = drive->hwif;
 478         struct request *rq = HWGROUP(drive)->rq;
 479         u8 stat = hwif->INB(IDE_STATUS_REG);
 480
 481         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 482                 return task_error(drive, rq, __FUNCTION__, stat);
 483
 484         /* Deal with unexpected ATA data phase. */
 485         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 486                 return task_error(drive, rq, __FUNCTION__, stat);
 487
 488         if (!hwif->nleft) {
 489                 task_end_request(drive, rq, stat);
 490                 return ide_stopped;
 491         }
 492
 493         /* Still data left to transfer. */
 494         ide_pio_datablock(drive, rq, 1);
 495         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 496
 497         return ide_started;
 498 }
 499
 500 ide_startstop_t pre_task_out_intr (ide_drive_t *drive, struct request *rq)
 501 {
 502         ide_startstop_t startstop;
 503
 504         if (ide_wait_stat(&startstop, drive, DATA_READY,
 505                           drive->bad_wstat, WAIT_DRQ)) {
 506                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 507                                 drive->name,
 508                                 drive->hwif->data_phase ? "MULT" : "",
 509                                 drive->addressing ? "_EXT" : "");
 510                 return startstop;
 511         }
 512
 513         if (!drive->unmask)
 514                 local_irq_disable();
 515
 516         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 517         ide_pio_datablock(drive, rq, 1);
 518
 519         return ide_started;
 520 }
 521 EXPORT_SYMBOL(pre_task_out_intr);
 522
 523 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 524 {
 525         struct request rq;
 526
 527         memset(&rq, 0, sizeof(rq));
 528         rq.ref_count = 1;
 529         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 530         rq.buffer = buf;
 531
 532         /*
 533          * (ks) We transfer currently only whole sectors.
 534          * This is suffient for now.  But, it would be great,
 535          * if we would find a solution to transfer any size.
 536          * To support special commands like READ LONG.
 537          */
 538         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 539         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 540
 541         if (task->tf_flags & IDE_TFLAG_WRITE)
 542                 rq.cmd_flags |= REQ_RW;
 543
 544         rq.special = task;
 545         task->rq = &rq;
 546
 547         return ide_do_drive_cmd(drive, &rq, ide_wait);
 548 }
 549
 550 EXPORT_SYMBOL(ide_raw_taskfile);
 551
 552 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 553 {
 554         task->data_phase = TASKFILE_NO_DATA;
 555
 556         return ide_raw_taskfile(drive, task, NULL, 0);
 557 }
 558 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 559
 560 #ifdef CONFIG_IDE_TASK_IOCTL
 561 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 562 {
 563         ide_task_request_t      *req_task;
 564         ide_task_t              args;
 565         u8 *outbuf              = NULL;
 566         u8 *inbuf               = NULL;
 567         u8 *data_buf            = NULL;
 568         int err                 = 0;
 569         int tasksize            = sizeof(struct ide_task_request_s);
 570         unsigned int taskin     = 0;
 571         unsigned int taskout    = 0;
 572         u16 nsect               = 0;
 573         u8 io_32bit             = drive->io_32bit;
 574         char __user *buf = (char __user *)arg;
 575
 576 //      printk("IDE Taskfile ...\n");
 577
 578         req_task = kzalloc(tasksize, GFP_KERNEL);
 579         if (req_task == NULL) return -ENOMEM;
 580         if (copy_from_user(req_task, buf, tasksize)) {
 581                 kfree(req_task);
 582                 return -EFAULT;
 583         }
 584
 585         taskout = req_task->out_size;
 586         taskin  = req_task->in_size;
 587
 588         if (taskin > 65536 || taskout > 65536) {
 589                 err = -EINVAL;
 590                 goto abort;
 591         }
 592
 593         if (taskout) {
 594                 int outtotal = tasksize;
 595                 outbuf = kzalloc(taskout, GFP_KERNEL);
 596                 if (outbuf == NULL) {
 597                         err = -ENOMEM;
 598                         goto abort;
 599                 }
 600                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 601                         err = -EFAULT;
 602                         goto abort;
 603                 }
 604         }
 605
 606         if (taskin) {
 607                 int intotal = tasksize + taskout;
 608                 inbuf = kzalloc(taskin, GFP_KERNEL);
 609                 if (inbuf == NULL) {
 610                         err = -ENOMEM;
 611                         goto abort;
 612                 }
 613                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 614                         err = -EFAULT;
 615                         goto abort;
 616                 }
 617         }
 618
 619         memset(&args, 0, sizeof(ide_task_t));
 620
 621         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 622         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 623
 624         args.data_phase = req_task->data_phase;
 625
 626         args.tf_flags = IDE_TFLAG_OUT_DEVICE;
 627         if (drive->addressing == 1)
 628                 args.tf_flags |= IDE_TFLAG_LBA48;
 629
 630         if (req_task->out_flags.all) {
 631                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 632
 633                 if (req_task->out_flags.b.data)
 634                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 635
 636                 if (req_task->out_flags.b.nsector_hob)
 637                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 638                 if (req_task->out_flags.b.sector_hob)
 639                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 640                 if (req_task->out_flags.b.lcyl_hob)
 641                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 642                 if (req_task->out_flags.b.hcyl_hob)
 643                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 644
 645                 if (req_task->out_flags.b.error_feature)
 646                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 647                 if (req_task->out_flags.b.nsector)
 648                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 649                 if (req_task->out_flags.b.sector)
 650                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 651                 if (req_task->out_flags.b.lcyl)
 652                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 653                 if (req_task->out_flags.b.hcyl)
 654                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 655         } else {
 656                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 657                 if (args.tf_flags & IDE_TFLAG_LBA48)
 658                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 659         }
 660
 661         if (req_task->in_flags.b.data)
 662                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 663
 664         drive->io_32bit = 0;
 665         switch(req_task->data_phase) {
 666                 case TASKFILE_MULTI_OUT:
 667                         if (!drive->mult_count) {
 668                                 /* (hs): give up if multcount is not set */
 669                                 printk(KERN_ERR "%s: %s Multimode Write " \
 670                                         "multcount is not set\n",
 671                                         drive->name, __FUNCTION__);
 672                                 err = -EPERM;
 673                                 goto abort;
 674                         }
 675                         /* fall through */
 676                 case TASKFILE_OUT:
 677                         /* fall through */
 678                 case TASKFILE_OUT_DMAQ:
 679                 case TASKFILE_OUT_DMA:
 680                         nsect = taskout / SECTOR_SIZE;
 681                         data_buf = outbuf;
 682                         break;
 683                 case TASKFILE_MULTI_IN:
 684                         if (!drive->mult_count) {
 685                                 /* (hs): give up if multcount is not set */
 686                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 687                                         "multcount is not set\n",
 688                                         drive->name, __FUNCTION__);
 689                                 err = -EPERM;
 690                                 goto abort;
 691                         }
 692                         /* fall through */
 693                 case TASKFILE_IN:
 694                         /* fall through */
 695                 case TASKFILE_IN_DMAQ:
 696                 case TASKFILE_IN_DMA:
 697                         nsect = taskin / SECTOR_SIZE;
 698                         data_buf = inbuf;
 699                         break;
 700                 case TASKFILE_NO_DATA:
 701                         break;
 702                 default:
 703                         err = -EFAULT;
 704                         goto abort;
 705         }
 706
 707         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 708                 nsect = 0;
 709         else if (!nsect) {
 710                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 711
 712                 if (!nsect) {
 713                         printk(KERN_ERR "%s: in/out command without data\n",
 714                                         drive->name);
 715                         err = -EFAULT;
 716                         goto abort;
 717                 }
 718         }
 719
 720         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 721                 args.tf_flags |= IDE_TFLAG_WRITE;
 722
 723         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 724
 725         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 726         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 727
 728         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 729             req_task->in_flags.all == 0) {
 730                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 731                 if (drive->addressing == 1)
 732                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 733         }
 734
 735         if (copy_to_user(buf, req_task, tasksize)) {
 736                 err = -EFAULT;
 737                 goto abort;
 738         }
 739         if (taskout) {
 740                 int outtotal = tasksize;
 741                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 742                         err = -EFAULT;
 743                         goto abort;
 744                 }
 745         }
 746         if (taskin) {
 747                 int intotal = tasksize + taskout;
 748                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 749                         err = -EFAULT;
 750                         goto abort;
 751                 }
 752         }
 753 abort:
 754         kfree(req_task);
 755         kfree(outbuf);
 756         kfree(inbuf);
 757
 758 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 759
 760         drive->io_32bit = io_32bit;
 761
 762         return err;
 763 }
 764 #endif
 765
 766 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 767 {
 768         struct request rq;
 769         u8 buffer[4];
 770
 771         if (!buf)
 772                 buf = buffer;
 773         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 774         ide_init_drive_cmd(&rq);
 775         rq.buffer = buf;
 776         *buf++ = cmd;
 777         *buf++ = nsect;
 778         *buf++ = feature;
 779         *buf++ = sectors;
 780         return ide_do_drive_cmd(drive, &rq, ide_wait);
 781 }
 782
 783 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 784 {
 785         int err = 0;
 786         u8 args[4], *argbuf = args;
 787         u8 xfer_rate = 0;
 788         int argsize = 4;
 789         ide_task_t tfargs;
 790         struct ide_taskfile *tf = &tfargs.tf;
 791
 792         if (NULL == (void *) arg) {
 793                 struct request rq;
 794                 ide_init_drive_cmd(&rq);
 795                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 796         }
 797
 798         if (copy_from_user(args, (void __user *)arg, 4))
 799                 return -EFAULT;
 800
 801         memset(&tfargs, 0, sizeof(ide_task_t));
 802         tf->feature = args[2];
 803         tf->nsect   = args[3];
 804         tf->lbal    = args[1];
 805         tf->command = args[0];
 806
 807         if (args[3]) {
 808                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 809                 argbuf = kzalloc(argsize, GFP_KERNEL);
 810                 if (argbuf == NULL)
 811                         return -ENOMEM;
 812         }
 813         if (set_transfer(drive, &tfargs)) {
 814                 xfer_rate = args[1];
 815                 if (ide_ata66_check(drive, &tfargs))
 816                         goto abort;
 817         }
 818
 819         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 820
 821         if (!err && xfer_rate) {
 822                 /* active-retuning-calls future */
 823                 ide_set_xfer_rate(drive, xfer_rate);
 824                 ide_driveid_update(drive);
 825         }
 826 abort:
 827         if (copy_to_user((void __user *)arg, argbuf, argsize))
 828                 err = -EFAULT;
 829         if (argsize > 4)
 830                 kfree(argbuf);
 831         return err;
 832 }
 833
 834 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 835 {
 836         void __user *p = (void __user *)arg;
 837         int err = 0;
 838         u8 args[7];
 839         ide_task_t task;
 840
 841         if (copy_from_user(args, p, 7))
 842                 return -EFAULT;
 843
 844         memset(&task, 0, sizeof(task));
 845         memcpy(&task.tf_array[7], &args[1], 6);
 846         task.tf.command = args[0];
 847         task.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_OUT_DEVICE;
 848
 849         err = ide_no_data_taskfile(drive, &task);
 850
 851         args[0] = task.tf.command;
 852         memcpy(&args[1], &task.tf_array[7], 6);
 853
 854         if (copy_to_user(p, args, 7))
 855                 err = -EFAULT;
 856
 857         return err;
 858 }