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   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 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  39 {
  40         ide_hwif_t *hwif = drive->hwif;
  41         struct ide_taskfile *tf = &task->tf;
  42         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  43
  44         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  45                 HIHI = 0xFF;
  46
  47 #ifdef DEBUG
  48         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  49                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  50                 drive->name, tf->feature, tf->nsect, tf->lbal,
  51                 tf->lbam, tf->lbah, tf->device, tf->command);
  52         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  53                 "lbam 0x%02x lbah 0x%02x\n",
  54                 drive->name, tf->hob_nsect, tf->hob_lbal,
  55                 tf->hob_lbam, tf->hob_lbah);
  56 #endif
  57
  58         ide_set_irq(drive, 1);
  59
  60         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  61                 SELECT_MASK(drive, 0);
  62
  63         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  64                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  65
  66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  67                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  69                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  71                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  73                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  74         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  75                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  76
  77         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  78                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  79         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  80                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  81         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  82                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
  83         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  84                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
  85         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  86                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
  87
  88         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  89                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
  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
 139         if (task->data_phase == TASKFILE_MULTI_IN ||
 140             task->data_phase == TASKFILE_MULTI_OUT) {
 141                 if (!drive->mult_count) {
 142                         printk(KERN_ERR "%s: multimode not set!\n",
 143                                         drive->name);
 144                         return ide_stopped;
 145                 }
 146         }
 147
 148         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 149                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 150
 151         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 152                 ide_tf_load(drive, task);
 153
 154         switch (task->data_phase) {
 155         case TASKFILE_MULTI_OUT:
 156         case TASKFILE_OUT:
 157                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 158                 ndelay(400);    /* FIXME */
 159                 return pre_task_out_intr(drive, task->rq);
 160         case TASKFILE_MULTI_IN:
 161         case TASKFILE_IN:
 162                 handler = task_in_intr;
 163                 /* fall-through */
 164         case TASKFILE_NO_DATA:
 165                 if (handler == NULL)
 166                         handler = task_no_data_intr;
 167                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 168                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 169                         switch (tf->command) {
 170                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 171                         case WIN_RESTORE: handler = recal_intr;         break;
 172                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 173                         }
 174                 }
 175                 ide_execute_command(drive, tf->command, handler,
 176                                     WAIT_WORSTCASE, NULL);
 177                 return ide_started;
 178         default:
 179                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 180                     hwif->dma_setup(drive))
 181                         return ide_stopped;
 182                 hwif->dma_exec_cmd(drive, tf->command);
 183                 hwif->dma_start(drive);
 184                 return ide_started;
 185         }
 186 }
 187 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 188
 189 /*
 190  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 191  */
 192 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 193 {
 194         ide_hwif_t *hwif = HWIF(drive);
 195         u8 stat;
 196
 197         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 198                 drive->mult_count = drive->mult_req;
 199         } else {
 200                 drive->mult_req = drive->mult_count = 0;
 201                 drive->special.b.recalibrate = 1;
 202                 (void) ide_dump_status(drive, "set_multmode", stat);
 203         }
 204         return ide_stopped;
 205 }
 206
 207 /*
 208  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 209  */
 210 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 211 {
 212         ide_hwif_t *hwif = HWIF(drive);
 213         int retries = 5;
 214         u8 stat;
 215
 216         while (((stat = hwif->INB(IDE_STATUS_REG)) & 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         ide_hwif_t *hwif = HWIF(drive);
 236         u8 stat;
 237
 238         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 239                 return ide_error(drive, "recal_intr", stat);
 240         return ide_stopped;
 241 }
 242
 243 /*
 244  * Handler for commands without a data phase
 245  */
 246 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 247 {
 248         ide_task_t *args        = HWGROUP(drive)->rq->special;
 249         ide_hwif_t *hwif        = HWIF(drive);
 250         u8 stat;
 251
 252         local_irq_enable_in_hardirq();
 253         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),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, hwif->INB(IDE_ERROR_REG));
 259
 260         return ide_stopped;
 261 }
 262
 263 static u8 wait_drive_not_busy(ide_drive_t *drive)
 264 {
 265         ide_hwif_t *hwif = HWIF(drive);
 266         int retries;
 267         u8 stat;
 268
 269         /*
 270          * Last sector was transfered, wait until drive is ready.
 271          * This can take up to 10 usec, but we will wait max 1 ms
 272          * (drive_cmd_intr() waits that long).
 273          */
 274         for (retries = 0; retries < 100; retries++) {
 275                 if ((stat = hwif->INB(IDE_STATUS_REG)) & 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 static void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 412 {
 413         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 414                 ide_task_t *task = rq->special;
 415
 416                 if (task->tf_flags & IDE_TFLAG_FLAGGED) {
 417                         u8 err = drive->hwif->INB(IDE_ERROR_REG);
 418                         ide_end_drive_cmd(drive, stat, err);
 419                         return;
 420                 }
 421         }
 422
 423         if (rq->rq_disk) {
 424                 ide_driver_t *drv;
 425
 426                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 427                 drv->end_request(drive, 1, rq->nr_sectors);
 428         } else
 429                 ide_end_request(drive, 1, rq->nr_sectors);
 430 }
 431
 432 /*
 433  * Handler for command with PIO data-in phase (Read/Read Multiple).
 434  */
 435 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 436 {
 437         ide_hwif_t *hwif = drive->hwif;
 438         struct request *rq = HWGROUP(drive)->rq;
 439         u8 stat = hwif->INB(IDE_STATUS_REG);
 440
 441         /* new way for dealing with premature shared PCI interrupts */
 442         if (!OK_STAT(stat, DATA_READY, BAD_R_STAT)) {
 443                 if (stat & (ERR_STAT | DRQ_STAT))
 444                         return task_error(drive, rq, __FUNCTION__, stat);
 445                 /* No data yet, so wait for another IRQ. */
 446                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 447                 return ide_started;
 448         }
 449
 450         ide_pio_datablock(drive, rq, 0);
 451
 452         /* If it was the last datablock check status and finish transfer. */
 453         if (!hwif->nleft) {
 454                 stat = wait_drive_not_busy(drive);
 455                 if (!OK_STAT(stat, 0, BAD_STAT))
 456                         return task_error(drive, rq, __FUNCTION__, stat);
 457                 task_end_request(drive, rq, stat);
 458                 return ide_stopped;
 459         }
 460
 461         /* Still data left to transfer. */
 462         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 463
 464         return ide_started;
 465 }
 466
 467 /*
 468  * Handler for command with PIO data-out phase (Write/Write Multiple).
 469  */
 470 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 471 {
 472         ide_hwif_t *hwif = drive->hwif;
 473         struct request *rq = HWGROUP(drive)->rq;
 474         u8 stat = hwif->INB(IDE_STATUS_REG);
 475
 476         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 477                 return task_error(drive, rq, __FUNCTION__, stat);
 478
 479         /* Deal with unexpected ATA data phase. */
 480         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 481                 return task_error(drive, rq, __FUNCTION__, stat);
 482
 483         if (!hwif->nleft) {
 484                 task_end_request(drive, rq, stat);
 485                 return ide_stopped;
 486         }
 487
 488         /* Still data left to transfer. */
 489         ide_pio_datablock(drive, rq, 1);
 490         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 491
 492         return ide_started;
 493 }
 494
 495 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 496 {
 497         ide_startstop_t startstop;
 498
 499         if (ide_wait_stat(&startstop, drive, DATA_READY,
 500                           drive->bad_wstat, WAIT_DRQ)) {
 501                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 502                                 drive->name,
 503                                 drive->hwif->data_phase ? "MULT" : "",
 504                                 drive->addressing ? "_EXT" : "");
 505                 return startstop;
 506         }
 507
 508         if (!drive->unmask)
 509                 local_irq_disable();
 510
 511         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 512         ide_pio_datablock(drive, rq, 1);
 513
 514         return ide_started;
 515 }
 516
 517 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 518 {
 519         struct request rq;
 520
 521         memset(&rq, 0, sizeof(rq));
 522         rq.ref_count = 1;
 523         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 524         rq.buffer = buf;
 525
 526         /*
 527          * (ks) We transfer currently only whole sectors.
 528          * This is suffient for now.  But, it would be great,
 529          * if we would find a solution to transfer any size.
 530          * To support special commands like READ LONG.
 531          */
 532         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 533         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 534
 535         if (task->tf_flags & IDE_TFLAG_WRITE)
 536                 rq.cmd_flags |= REQ_RW;
 537
 538         rq.special = task;
 539         task->rq = &rq;
 540
 541         return ide_do_drive_cmd(drive, &rq, ide_wait);
 542 }
 543
 544 EXPORT_SYMBOL(ide_raw_taskfile);
 545
 546 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 547 {
 548         task->data_phase = TASKFILE_NO_DATA;
 549
 550         return ide_raw_taskfile(drive, task, NULL, 0);
 551 }
 552 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 553
 554 #ifdef CONFIG_IDE_TASK_IOCTL
 555 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 556 {
 557         ide_task_request_t      *req_task;
 558         ide_task_t              args;
 559         u8 *outbuf              = NULL;
 560         u8 *inbuf               = NULL;
 561         u8 *data_buf            = NULL;
 562         int err                 = 0;
 563         int tasksize            = sizeof(struct ide_task_request_s);
 564         unsigned int taskin     = 0;
 565         unsigned int taskout    = 0;
 566         u16 nsect               = 0;
 567         char __user *buf = (char __user *)arg;
 568
 569 //      printk("IDE Taskfile ...\n");
 570
 571         req_task = kzalloc(tasksize, GFP_KERNEL);
 572         if (req_task == NULL) return -ENOMEM;
 573         if (copy_from_user(req_task, buf, tasksize)) {
 574                 kfree(req_task);
 575                 return -EFAULT;
 576         }
 577
 578         taskout = req_task->out_size;
 579         taskin  = req_task->in_size;
 580
 581         if (taskin > 65536 || taskout > 65536) {
 582                 err = -EINVAL;
 583                 goto abort;
 584         }
 585
 586         if (taskout) {
 587                 int outtotal = tasksize;
 588                 outbuf = kzalloc(taskout, GFP_KERNEL);
 589                 if (outbuf == NULL) {
 590                         err = -ENOMEM;
 591                         goto abort;
 592                 }
 593                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 594                         err = -EFAULT;
 595                         goto abort;
 596                 }
 597         }
 598
 599         if (taskin) {
 600                 int intotal = tasksize + taskout;
 601                 inbuf = kzalloc(taskin, GFP_KERNEL);
 602                 if (inbuf == NULL) {
 603                         err = -ENOMEM;
 604                         goto abort;
 605                 }
 606                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 607                         err = -EFAULT;
 608                         goto abort;
 609                 }
 610         }
 611
 612         memset(&args, 0, sizeof(ide_task_t));
 613
 614         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 615         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 616
 617         args.data_phase = req_task->data_phase;
 618
 619         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 620                         IDE_TFLAG_IN_TF;
 621         if (drive->addressing == 1)
 622                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 623
 624         if (req_task->out_flags.all) {
 625                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 626
 627                 if (req_task->out_flags.b.data)
 628                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 629
 630                 if (req_task->out_flags.b.nsector_hob)
 631                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 632                 if (req_task->out_flags.b.sector_hob)
 633                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 634                 if (req_task->out_flags.b.lcyl_hob)
 635                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 636                 if (req_task->out_flags.b.hcyl_hob)
 637                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 638
 639                 if (req_task->out_flags.b.error_feature)
 640                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 641                 if (req_task->out_flags.b.nsector)
 642                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 643                 if (req_task->out_flags.b.sector)
 644                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 645                 if (req_task->out_flags.b.lcyl)
 646                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 647                 if (req_task->out_flags.b.hcyl)
 648                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 649         } else {
 650                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 651                 if (args.tf_flags & IDE_TFLAG_LBA48)
 652                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 653         }
 654
 655         if (req_task->in_flags.b.data)
 656                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 657
 658         switch(req_task->data_phase) {
 659                 case TASKFILE_MULTI_OUT:
 660                         if (!drive->mult_count) {
 661                                 /* (hs): give up if multcount is not set */
 662                                 printk(KERN_ERR "%s: %s Multimode Write " \
 663                                         "multcount is not set\n",
 664                                         drive->name, __FUNCTION__);
 665                                 err = -EPERM;
 666                                 goto abort;
 667                         }
 668                         /* fall through */
 669                 case TASKFILE_OUT:
 670                         /* fall through */
 671                 case TASKFILE_OUT_DMAQ:
 672                 case TASKFILE_OUT_DMA:
 673                         nsect = taskout / SECTOR_SIZE;
 674                         data_buf = outbuf;
 675                         break;
 676                 case TASKFILE_MULTI_IN:
 677                         if (!drive->mult_count) {
 678                                 /* (hs): give up if multcount is not set */
 679                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 680                                         "multcount is not set\n",
 681                                         drive->name, __FUNCTION__);
 682                                 err = -EPERM;
 683                                 goto abort;
 684                         }
 685                         /* fall through */
 686                 case TASKFILE_IN:
 687                         /* fall through */
 688                 case TASKFILE_IN_DMAQ:
 689                 case TASKFILE_IN_DMA:
 690                         nsect = taskin / SECTOR_SIZE;
 691                         data_buf = inbuf;
 692                         break;
 693                 case TASKFILE_NO_DATA:
 694                         break;
 695                 default:
 696                         err = -EFAULT;
 697                         goto abort;
 698         }
 699
 700         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 701                 nsect = 0;
 702         else if (!nsect) {
 703                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 704
 705                 if (!nsect) {
 706                         printk(KERN_ERR "%s: in/out command without data\n",
 707                                         drive->name);
 708                         err = -EFAULT;
 709                         goto abort;
 710                 }
 711         }
 712
 713         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 714                 args.tf_flags |= IDE_TFLAG_WRITE;
 715
 716         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 717
 718         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 719         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 720
 721         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 722             req_task->in_flags.all == 0) {
 723                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 724                 if (drive->addressing == 1)
 725                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 726         }
 727
 728         if (copy_to_user(buf, req_task, tasksize)) {
 729                 err = -EFAULT;
 730                 goto abort;
 731         }
 732         if (taskout) {
 733                 int outtotal = tasksize;
 734                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 735                         err = -EFAULT;
 736                         goto abort;
 737                 }
 738         }
 739         if (taskin) {
 740                 int intotal = tasksize + taskout;
 741                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 742                         err = -EFAULT;
 743                         goto abort;
 744                 }
 745         }
 746 abort:
 747         kfree(req_task);
 748         kfree(outbuf);
 749         kfree(inbuf);
 750
 751 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 752
 753         return err;
 754 }
 755 #endif
 756
 757 int ide_wait_cmd (ide_drive_t *drive, u8 cmd, u8 nsect, u8 feature, u8 sectors, u8 *buf)
 758 {
 759         struct request rq;
 760         u8 buffer[4];
 761
 762         if (!buf)
 763                 buf = buffer;
 764         memset(buf, 0, 4 + SECTOR_WORDS * 4 * sectors);
 765         ide_init_drive_cmd(&rq);
 766         rq.buffer = buf;
 767         *buf++ = cmd;
 768         *buf++ = nsect;
 769         *buf++ = feature;
 770         *buf++ = sectors;
 771         return ide_do_drive_cmd(drive, &rq, ide_wait);
 772 }
 773
 774 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 775 {
 776         int err = 0;
 777         u8 args[4], *argbuf = args;
 778         u8 xfer_rate = 0;
 779         int argsize = 4;
 780         ide_task_t tfargs;
 781         struct ide_taskfile *tf = &tfargs.tf;
 782
 783         if (NULL == (void *) arg) {
 784                 struct request rq;
 785                 ide_init_drive_cmd(&rq);
 786                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 787         }
 788
 789         if (copy_from_user(args, (void __user *)arg, 4))
 790                 return -EFAULT;
 791
 792         memset(&tfargs, 0, sizeof(ide_task_t));
 793         tf->feature = args[2];
 794         tf->nsect   = args[3];
 795         tf->lbal    = args[1];
 796         tf->command = args[0];
 797
 798         if (args[3]) {
 799                 argsize = 4 + (SECTOR_WORDS * 4 * args[3]);
 800                 argbuf = kzalloc(argsize, GFP_KERNEL);
 801                 if (argbuf == NULL)
 802                         return -ENOMEM;
 803         }
 804         if (set_transfer(drive, &tfargs)) {
 805                 xfer_rate = args[1];
 806                 if (ide_ata66_check(drive, &tfargs))
 807                         goto abort;
 808         }
 809
 810         err = ide_wait_cmd(drive, args[0], args[1], args[2], args[3], argbuf);
 811
 812         if (!err && xfer_rate) {
 813                 /* active-retuning-calls future */
 814                 ide_set_xfer_rate(drive, xfer_rate);
 815                 ide_driveid_update(drive);
 816         }
 817 abort:
 818         if (copy_to_user((void __user *)arg, argbuf, argsize))
 819                 err = -EFAULT;
 820         if (argsize > 4)
 821                 kfree(argbuf);
 822         return err;
 823 }
 824
 825 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 826 {
 827         void __user *p = (void __user *)arg;
 828         int err = 0;
 829         u8 args[7];
 830         ide_task_t task;
 831
 832         if (copy_from_user(args, p, 7))
 833                 return -EFAULT;
 834
 835         memset(&task, 0, sizeof(task));
 836         memcpy(&task.tf_array[7], &args[1], 6);
 837         task.tf.command = args[0];
 838         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 839
 840         err = ide_no_data_taskfile(drive, &task);
 841
 842         args[0] = task.tf.command;
 843         memcpy(&args[1], &task.tf_array[7], 6);
 844
 845         if (copy_to_user(p, args, 7))
 846                 err = -EFAULT;
 847
 848         return err;
 849 }