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,
  63                            hwif->io_ports[IDE_DATA_OFFSET]);
  64
  65         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  66                 hwif->OUTB(tf->hob_feature, hwif->io_ports[IDE_FEATURE_OFFSET]);
  67         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  68                 hwif->OUTB(tf->hob_nsect, hwif->io_ports[IDE_NSECTOR_OFFSET]);
  69         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  70                 hwif->OUTB(tf->hob_lbal, hwif->io_ports[IDE_SECTOR_OFFSET]);
  71         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  72                 hwif->OUTB(tf->hob_lbam, hwif->io_ports[IDE_LCYL_OFFSET]);
  73         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  74                 hwif->OUTB(tf->hob_lbah, hwif->io_ports[IDE_HCYL_OFFSET]);
  75
  76         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  77                 hwif->OUTB(tf->feature, hwif->io_ports[IDE_FEATURE_OFFSET]);
  78         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  79                 hwif->OUTB(tf->nsect, hwif->io_ports[IDE_NSECTOR_OFFSET]);
  80         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  81                 hwif->OUTB(tf->lbal, hwif->io_ports[IDE_SECTOR_OFFSET]);
  82         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  83                 hwif->OUTB(tf->lbam, hwif->io_ports[IDE_LCYL_OFFSET]);
  84         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  85                 hwif->OUTB(tf->lbah, hwif->io_ports[IDE_HCYL_OFFSET]);
  86
  87         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  88                 hwif->OUTB((tf->device & HIHI) | drive->select.all,
  89                            hwif->io_ports[IDE_SELECT_OFFSET]);
  90 }
  91
  92 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  93 {
  94         ide_task_t args;
  95
  96         memset(&args, 0, sizeof(ide_task_t));
  97         args.tf.nsect = 0x01;
  98         if (drive->media == ide_disk)
  99                 args.tf.command = WIN_IDENTIFY;
 100         else
 101                 args.tf.command = WIN_PIDENTIFY;
 102         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 103         args.data_phase = TASKFILE_IN;
 104         return ide_raw_taskfile(drive, &args, buf, 1);
 105 }
 106
 107 static int inline task_dma_ok(ide_task_t *task)
 108 {
 109         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
 110                 return 1;
 111
 112         switch (task->tf.command) {
 113                 case WIN_WRITEDMA_ONCE:
 114                 case WIN_WRITEDMA:
 115                 case WIN_WRITEDMA_EXT:
 116                 case WIN_READDMA_ONCE:
 117                 case WIN_READDMA:
 118                 case WIN_READDMA_EXT:
 119                 case WIN_IDENTIFY_DMA:
 120                         return 1;
 121         }
 122
 123         return 0;
 124 }
 125
 126 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 127 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 128 static ide_startstop_t recal_intr(ide_drive_t *);
 129 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 130 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 131 static ide_startstop_t task_in_intr(ide_drive_t *);
 132
 133 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 134 {
 135         ide_hwif_t *hwif        = HWIF(drive);
 136         struct ide_taskfile *tf = &task->tf;
 137         ide_handler_t *handler = NULL;
 138         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
 139
 140         if (task->data_phase == TASKFILE_MULTI_IN ||
 141             task->data_phase == TASKFILE_MULTI_OUT) {
 142                 if (!drive->mult_count) {
 143                         printk(KERN_ERR "%s: multimode not set!\n",
 144                                         drive->name);
 145                         return ide_stopped;
 146                 }
 147         }
 148
 149         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 150                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 151
 152         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 153                 ide_tf_load(drive, task);
 154
 155         switch (task->data_phase) {
 156         case TASKFILE_MULTI_OUT:
 157         case TASKFILE_OUT:
 158                 hwif->OUTBSYNC(drive, tf->command,
 159                                hwif->io_ports[IDE_COMMAND_OFFSET]);
 160                 ndelay(400);    /* FIXME */
 161                 return pre_task_out_intr(drive, task->rq);
 162         case TASKFILE_MULTI_IN:
 163         case TASKFILE_IN:
 164                 handler = task_in_intr;
 165                 /* fall-through */
 166         case TASKFILE_NO_DATA:
 167                 if (handler == NULL)
 168                         handler = task_no_data_intr;
 169                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 170                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 171                         switch (tf->command) {
 172                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 173                         case WIN_RESTORE: handler = recal_intr;         break;
 174                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 175                         }
 176                 }
 177                 ide_execute_command(drive, tf->command, handler,
 178                                     WAIT_WORSTCASE, NULL);
 179                 return ide_started;
 180         default:
 181                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 182                     dma_ops->dma_setup(drive))
 183                         return ide_stopped;
 184                 dma_ops->dma_exec_cmd(drive, tf->command);
 185                 dma_ops->dma_start(drive);
 186                 return ide_started;
 187         }
 188 }
 189 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 190
 191 /*
 192  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 193  */
 194 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 195 {
 196         u8 stat = ide_read_status(drive);
 197
 198         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 199                 drive->mult_count = drive->mult_req;
 200         else {
 201                 drive->mult_req = drive->mult_count = 0;
 202                 drive->special.b.recalibrate = 1;
 203                 (void) ide_dump_status(drive, "set_multmode", stat);
 204         }
 205         return ide_stopped;
 206 }
 207
 208 /*
 209  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 210  */
 211 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 212 {
 213         int retries = 5;
 214         u8 stat;
 215
 216         while (((stat = ide_read_status(drive)) & BUSY_STAT) && retries--)
 217                 udelay(10);
 218
 219         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 220                 return ide_stopped;
 221
 222         if (stat & (ERR_STAT|DRQ_STAT))
 223                 return ide_error(drive, "set_geometry_intr", stat);
 224
 225         BUG_ON(HWGROUP(drive)->handler != NULL);
 226         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 227         return ide_started;
 228 }
 229
 230 /*
 231  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 232  */
 233 static ide_startstop_t recal_intr(ide_drive_t *drive)
 234 {
 235         u8 stat = ide_read_status(drive);
 236
 237         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 238                 return ide_error(drive, "recal_intr", stat);
 239         return ide_stopped;
 240 }
 241
 242 /*
 243  * Handler for commands without a data phase
 244  */
 245 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 246 {
 247         ide_task_t *args        = HWGROUP(drive)->rq->special;
 248         u8 stat;
 249
 250         local_irq_enable_in_hardirq();
 251         stat = ide_read_status(drive);
 252
 253         if (!OK_STAT(stat, READY_STAT, BAD_STAT))
 254                 return ide_error(drive, "task_no_data_intr", stat);
 255                 /* calls ide_end_drive_cmd */
 256
 257         if (args)
 258                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 259
 260         return ide_stopped;
 261 }
 262
 263 static u8 wait_drive_not_busy(ide_drive_t *drive)
 264 {
 265         int retries;
 266         u8 stat;
 267
 268         /*
 269          * Last sector was transfered, wait until drive is ready.
 270          * This can take up to 10 usec, but we will wait max 1 ms.
 271          */
 272         for (retries = 0; retries < 100; retries++) {
 273                 stat = ide_read_status(drive);
 274
 275                 if (stat & BUSY_STAT)
 276                         udelay(10);
 277                 else
 278                         break;
 279         }
 280
 281         if (stat & BUSY_STAT)
 282                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 283
 284         return stat;
 285 }
 286
 287 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 288 {
 289         ide_hwif_t *hwif = drive->hwif;
 290         struct scatterlist *sg = hwif->sg_table;
 291         struct scatterlist *cursg = hwif->cursg;
 292         struct page *page;
 293 #ifdef CONFIG_HIGHMEM
 294         unsigned long flags;
 295 #endif
 296         unsigned int offset;
 297         u8 *buf;
 298
 299         cursg = hwif->cursg;
 300         if (!cursg) {
 301                 cursg = sg;
 302                 hwif->cursg = sg;
 303         }
 304
 305         page = sg_page(cursg);
 306         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 307
 308         /* get the current page and offset */
 309         page = nth_page(page, (offset >> PAGE_SHIFT));
 310         offset %= PAGE_SIZE;
 311
 312 #ifdef CONFIG_HIGHMEM
 313         local_irq_save(flags);
 314 #endif
 315         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 316
 317         hwif->nleft--;
 318         hwif->cursg_ofs++;
 319
 320         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 321                 hwif->cursg = sg_next(hwif->cursg);
 322                 hwif->cursg_ofs = 0;
 323         }
 324
 325         /* do the actual data transfer */
 326         if (write)
 327                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
 328         else
 329                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
 330
 331         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 332 #ifdef CONFIG_HIGHMEM
 333         local_irq_restore(flags);
 334 #endif
 335 }
 336
 337 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 338 {
 339         unsigned int nsect;
 340
 341         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 342         while (nsect--)
 343                 ide_pio_sector(drive, write);
 344 }
 345
 346 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 347                                      unsigned int write)
 348 {
 349         u8 saved_io_32bit = drive->io_32bit;
 350
 351         if (rq->bio)    /* fs request */
 352                 rq->errors = 0;
 353
 354         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 355                 ide_task_t *task = rq->special;
 356
 357                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 358                         drive->io_32bit = 0;
 359         }
 360
 361         touch_softlockup_watchdog();
 362
 363         switch (drive->hwif->data_phase) {
 364         case TASKFILE_MULTI_IN:
 365         case TASKFILE_MULTI_OUT:
 366                 ide_pio_multi(drive, write);
 367                 break;
 368         default:
 369                 ide_pio_sector(drive, write);
 370                 break;
 371         }
 372
 373         drive->io_32bit = saved_io_32bit;
 374 }
 375
 376 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 377                                   const char *s, u8 stat)
 378 {
 379         if (rq->bio) {
 380                 ide_hwif_t *hwif = drive->hwif;
 381                 int sectors = hwif->nsect - hwif->nleft;
 382
 383                 switch (hwif->data_phase) {
 384                 case TASKFILE_IN:
 385                         if (hwif->nleft)
 386                                 break;
 387                         /* fall through */
 388                 case TASKFILE_OUT:
 389                         sectors--;
 390                         break;
 391                 case TASKFILE_MULTI_IN:
 392                         if (hwif->nleft)
 393                                 break;
 394                         /* fall through */
 395                 case TASKFILE_MULTI_OUT:
 396                         sectors -= drive->mult_count;
 397                 default:
 398                         break;
 399                 }
 400
 401                 if (sectors > 0) {
 402                         ide_driver_t *drv;
 403
 404                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 405                         drv->end_request(drive, 1, sectors);
 406                 }
 407         }
 408         return ide_error(drive, s, stat);
 409 }
 410
 411 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 412 {
 413         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 414                 u8 err = ide_read_error(drive);
 415
 416                 ide_end_drive_cmd(drive, stat, err);
 417                 return;
 418         }
 419
 420         if (rq->rq_disk) {
 421                 ide_driver_t *drv;
 422
 423                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 424                 drv->end_request(drive, 1, rq->nr_sectors);
 425         } else
 426                 ide_end_request(drive, 1, rq->nr_sectors);
 427 }
 428
 429 /*
 430  * We got an interrupt on a task_in case, but no errors and no DRQ.
 431  *
 432  * It might be a spurious irq (shared irq), but it might be a
 433  * command that had no output.
 434  */
 435 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 436 {
 437         /* Command all done? */
 438         if (OK_STAT(stat, READY_STAT, BUSY_STAT)) {
 439                 task_end_request(drive, rq, stat);
 440                 return ide_stopped;
 441         }
 442
 443         /* Assume it was a spurious irq */
 444         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 445         return ide_started;
 446 }
 447
 448 /*
 449  * Handler for command with PIO data-in phase (Read/Read Multiple).
 450  */
 451 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 452 {
 453         ide_hwif_t *hwif = drive->hwif;
 454         struct request *rq = HWGROUP(drive)->rq;
 455         u8 stat = ide_read_status(drive);
 456
 457         /* Error? */
 458         if (stat & ERR_STAT)
 459                 return task_error(drive, rq, __func__, stat);
 460
 461         /* Didn't want any data? Odd. */
 462         if (!(stat & DRQ_STAT))
 463                 return task_in_unexpected(drive, rq, stat);
 464
 465         ide_pio_datablock(drive, rq, 0);
 466
 467         /* Are we done? Check status and finish transfer. */
 468         if (!hwif->nleft) {
 469                 stat = wait_drive_not_busy(drive);
 470                 if (!OK_STAT(stat, 0, BAD_STAT))
 471                         return task_error(drive, rq, __func__, stat);
 472                 task_end_request(drive, rq, stat);
 473                 return ide_stopped;
 474         }
 475
 476         /* Still data left to transfer. */
 477         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 478
 479         return ide_started;
 480 }
 481
 482 /*
 483  * Handler for command with PIO data-out phase (Write/Write Multiple).
 484  */
 485 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 486 {
 487         ide_hwif_t *hwif = drive->hwif;
 488         struct request *rq = HWGROUP(drive)->rq;
 489         u8 stat = ide_read_status(drive);
 490
 491         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 492                 return task_error(drive, rq, __func__, stat);
 493
 494         /* Deal with unexpected ATA data phase. */
 495         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 496                 return task_error(drive, rq, __func__, stat);
 497
 498         if (!hwif->nleft) {
 499                 task_end_request(drive, rq, stat);
 500                 return ide_stopped;
 501         }
 502
 503         /* Still data left to transfer. */
 504         ide_pio_datablock(drive, rq, 1);
 505         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 506
 507         return ide_started;
 508 }
 509
 510 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 511 {
 512         ide_startstop_t startstop;
 513
 514         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 515                           drive->bad_wstat, WAIT_DRQ)) {
 516                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 517                                 drive->name,
 518                                 drive->hwif->data_phase ? "MULT" : "",
 519                                 drive->addressing ? "_EXT" : "");
 520                 return startstop;
 521         }
 522
 523         if (!drive->unmask)
 524                 local_irq_disable();
 525
 526         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 527         ide_pio_datablock(drive, rq, 1);
 528
 529         return ide_started;
 530 }
 531
 532 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 533 {
 534         struct request rq;
 535
 536         memset(&rq, 0, sizeof(rq));
 537         rq.ref_count = 1;
 538         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 539         rq.buffer = buf;
 540
 541         /*
 542          * (ks) We transfer currently only whole sectors.
 543          * This is suffient for now.  But, it would be great,
 544          * if we would find a solution to transfer any size.
 545          * To support special commands like READ LONG.
 546          */
 547         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 548         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 549
 550         if (task->tf_flags & IDE_TFLAG_WRITE)
 551                 rq.cmd_flags |= REQ_RW;
 552
 553         rq.special = task;
 554         task->rq = &rq;
 555
 556         return ide_do_drive_cmd(drive, &rq, ide_wait);
 557 }
 558
 559 EXPORT_SYMBOL(ide_raw_taskfile);
 560
 561 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 562 {
 563         task->data_phase = TASKFILE_NO_DATA;
 564
 565         return ide_raw_taskfile(drive, task, NULL, 0);
 566 }
 567 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 568
 569 #ifdef CONFIG_IDE_TASK_IOCTL
 570 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 571 {
 572         ide_task_request_t      *req_task;
 573         ide_task_t              args;
 574         u8 *outbuf              = NULL;
 575         u8 *inbuf               = NULL;
 576         u8 *data_buf            = NULL;
 577         int err                 = 0;
 578         int tasksize            = sizeof(struct ide_task_request_s);
 579         unsigned int taskin     = 0;
 580         unsigned int taskout    = 0;
 581         u16 nsect               = 0;
 582         char __user *buf = (char __user *)arg;
 583
 584 //      printk("IDE Taskfile ...\n");
 585
 586         req_task = kzalloc(tasksize, GFP_KERNEL);
 587         if (req_task == NULL) return -ENOMEM;
 588         if (copy_from_user(req_task, buf, tasksize)) {
 589                 kfree(req_task);
 590                 return -EFAULT;
 591         }
 592
 593         taskout = req_task->out_size;
 594         taskin  = req_task->in_size;
 595
 596         if (taskin > 65536 || taskout > 65536) {
 597                 err = -EINVAL;
 598                 goto abort;
 599         }
 600
 601         if (taskout) {
 602                 int outtotal = tasksize;
 603                 outbuf = kzalloc(taskout, GFP_KERNEL);
 604                 if (outbuf == NULL) {
 605                         err = -ENOMEM;
 606                         goto abort;
 607                 }
 608                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 609                         err = -EFAULT;
 610                         goto abort;
 611                 }
 612         }
 613
 614         if (taskin) {
 615                 int intotal = tasksize + taskout;
 616                 inbuf = kzalloc(taskin, GFP_KERNEL);
 617                 if (inbuf == NULL) {
 618                         err = -ENOMEM;
 619                         goto abort;
 620                 }
 621                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 622                         err = -EFAULT;
 623                         goto abort;
 624                 }
 625         }
 626
 627         memset(&args, 0, sizeof(ide_task_t));
 628
 629         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 630         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 631
 632         args.data_phase = req_task->data_phase;
 633
 634         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 635                         IDE_TFLAG_IN_TF;
 636         if (drive->addressing == 1)
 637                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 638
 639         if (req_task->out_flags.all) {
 640                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 641
 642                 if (req_task->out_flags.b.data)
 643                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 644
 645                 if (req_task->out_flags.b.nsector_hob)
 646                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 647                 if (req_task->out_flags.b.sector_hob)
 648                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 649                 if (req_task->out_flags.b.lcyl_hob)
 650                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 651                 if (req_task->out_flags.b.hcyl_hob)
 652                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 653
 654                 if (req_task->out_flags.b.error_feature)
 655                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 656                 if (req_task->out_flags.b.nsector)
 657                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 658                 if (req_task->out_flags.b.sector)
 659                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 660                 if (req_task->out_flags.b.lcyl)
 661                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 662                 if (req_task->out_flags.b.hcyl)
 663                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 664         } else {
 665                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 666                 if (args.tf_flags & IDE_TFLAG_LBA48)
 667                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 668         }
 669
 670         if (req_task->in_flags.b.data)
 671                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 672
 673         switch(req_task->data_phase) {
 674                 case TASKFILE_MULTI_OUT:
 675                         if (!drive->mult_count) {
 676                                 /* (hs): give up if multcount is not set */
 677                                 printk(KERN_ERR "%s: %s Multimode Write " \
 678                                         "multcount is not set\n",
 679                                         drive->name, __func__);
 680                                 err = -EPERM;
 681                                 goto abort;
 682                         }
 683                         /* fall through */
 684                 case TASKFILE_OUT:
 685                         /* fall through */
 686                 case TASKFILE_OUT_DMAQ:
 687                 case TASKFILE_OUT_DMA:
 688                         nsect = taskout / SECTOR_SIZE;
 689                         data_buf = outbuf;
 690                         break;
 691                 case TASKFILE_MULTI_IN:
 692                         if (!drive->mult_count) {
 693                                 /* (hs): give up if multcount is not set */
 694                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 695                                         "multcount is not set\n",
 696                                         drive->name, __func__);
 697                                 err = -EPERM;
 698                                 goto abort;
 699                         }
 700                         /* fall through */
 701                 case TASKFILE_IN:
 702                         /* fall through */
 703                 case TASKFILE_IN_DMAQ:
 704                 case TASKFILE_IN_DMA:
 705                         nsect = taskin / SECTOR_SIZE;
 706                         data_buf = inbuf;
 707                         break;
 708                 case TASKFILE_NO_DATA:
 709                         break;
 710                 default:
 711                         err = -EFAULT;
 712                         goto abort;
 713         }
 714
 715         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 716                 nsect = 0;
 717         else if (!nsect) {
 718                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 719
 720                 if (!nsect) {
 721                         printk(KERN_ERR "%s: in/out command without data\n",
 722                                         drive->name);
 723                         err = -EFAULT;
 724                         goto abort;
 725                 }
 726         }
 727
 728         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 729                 args.tf_flags |= IDE_TFLAG_WRITE;
 730
 731         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 732
 733         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 734         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 735
 736         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 737             req_task->in_flags.all == 0) {
 738                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 739                 if (drive->addressing == 1)
 740                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 741         }
 742
 743         if (copy_to_user(buf, req_task, tasksize)) {
 744                 err = -EFAULT;
 745                 goto abort;
 746         }
 747         if (taskout) {
 748                 int outtotal = tasksize;
 749                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 750                         err = -EFAULT;
 751                         goto abort;
 752                 }
 753         }
 754         if (taskin) {
 755                 int intotal = tasksize + taskout;
 756                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 757                         err = -EFAULT;
 758                         goto abort;
 759                 }
 760         }
 761 abort:
 762         kfree(req_task);
 763         kfree(outbuf);
 764         kfree(inbuf);
 765
 766 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 767
 768         return err;
 769 }
 770 #endif
 771
 772 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 773 {
 774         u8 *buf = NULL;
 775         int bufsize = 0, err = 0;
 776         u8 args[4], xfer_rate = 0;
 777         ide_task_t tfargs;
 778         struct ide_taskfile *tf = &tfargs.tf;
 779         struct hd_driveid *id = drive->id;
 780
 781         if (NULL == (void *) arg) {
 782                 struct request rq;
 783
 784                 ide_init_drive_cmd(&rq);
 785                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 786
 787                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 788         }
 789
 790         if (copy_from_user(args, (void __user *)arg, 4))
 791                 return -EFAULT;
 792
 793         memset(&tfargs, 0, sizeof(ide_task_t));
 794         tf->feature = args[2];
 795         if (args[0] == WIN_SMART) {
 796                 tf->nsect = args[3];
 797                 tf->lbal  = args[1];
 798                 tf->lbam  = 0x4f;
 799                 tf->lbah  = 0xc2;
 800                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 801         } else {
 802                 tf->nsect = args[1];
 803                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 804                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 805         }
 806         tf->command = args[0];
 807         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 808
 809         if (args[3]) {
 810                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 811                 bufsize = SECTOR_WORDS * 4 * args[3];
 812                 buf = kzalloc(bufsize, GFP_KERNEL);
 813                 if (buf == NULL)
 814                         return -ENOMEM;
 815         }
 816
 817         if (tf->command == WIN_SETFEATURES &&
 818             tf->feature == SETFEATURES_XFER &&
 819             tf->nsect >= XFER_SW_DMA_0 &&
 820             (id->dma_ultra || id->dma_mword || id->dma_1word)) {
 821                 xfer_rate = args[1];
 822                 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 823                         printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 824                                             "be set\n", drive->name);
 825                         goto abort;
 826                 }
 827         }
 828
 829         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 830
 831         args[0] = tf->status;
 832         args[1] = tf->error;
 833         args[2] = tf->nsect;
 834
 835         if (!err && xfer_rate) {
 836                 /* active-retuning-calls future */
 837                 ide_set_xfer_rate(drive, xfer_rate);
 838                 ide_driveid_update(drive);
 839         }
 840 abort:
 841         if (copy_to_user((void __user *)arg, &args, 4))
 842                 err = -EFAULT;
 843         if (buf) {
 844                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 845                         err = -EFAULT;
 846                 kfree(buf);
 847         }
 848         return err;
 849 }
 850
 851 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 852 {
 853         void __user *p = (void __user *)arg;
 854         int err = 0;
 855         u8 args[7];
 856         ide_task_t task;
 857
 858         if (copy_from_user(args, p, 7))
 859                 return -EFAULT;
 860
 861         memset(&task, 0, sizeof(task));
 862         memcpy(&task.tf_array[7], &args[1], 6);
 863         task.tf.command = args[0];
 864         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 865
 866         err = ide_no_data_taskfile(drive, &task);
 867
 868         args[0] = task.tf.command;
 869         memcpy(&args[1], &task.tf_array[7], 6);
 870
 871         if (copy_to_user(p, args, 7))
 872                 err = -EFAULT;
 873
 874         return err;
 875 }