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/types.h>
  12 #include <linux/string.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/errno.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/hdreg.h>
  20 #include <linux/ide.h>
  21 #include <linux/scatterlist.h>
  22
  23 #include <asm/uaccess.h>
  24 #include <asm/io.h>
  25
  26 void ide_tf_dump(const char *s, struct ide_taskfile *tf)
  27 {
  28 #ifdef DEBUG
  29         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  30                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  31                 s, tf->feature, tf->nsect, tf->lbal,
  32                 tf->lbam, tf->lbah, tf->device, tf->command);
  33         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  34                 "lbam 0x%02x lbah 0x%02x\n",
  35                 s, tf->hob_nsect, tf->hob_lbal,
  36                 tf->hob_lbam, tf->hob_lbah);
  37 #endif
  38 }
  39
  40 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  41 {
  42         ide_task_t args;
  43
  44         memset(&args, 0, sizeof(ide_task_t));
  45         args.tf.nsect = 0x01;
  46         if (drive->media == ide_disk)
  47                 args.tf.command = ATA_CMD_ID_ATA;
  48         else
  49                 args.tf.command = ATA_CMD_ID_ATAPI;
  50         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
  51         args.data_phase = TASKFILE_IN;
  52         return ide_raw_taskfile(drive, &args, buf, 1);
  53 }
  54
  55 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  56 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
  57 static ide_startstop_t task_in_intr(ide_drive_t *);
  58
  59 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
  60 {
  61         ide_hwif_t *hwif        = HWIF(drive);
  62         struct ide_taskfile *tf = &task->tf;
  63         ide_handler_t *handler = NULL;
  64         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  65         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  66
  67         if (task->data_phase == TASKFILE_MULTI_IN ||
  68             task->data_phase == TASKFILE_MULTI_OUT) {
  69                 if (!drive->mult_count) {
  70                         printk(KERN_ERR "%s: multimode not set!\n",
  71                                         drive->name);
  72                         return ide_stopped;
  73                 }
  74         }
  75
  76         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  77                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
  78
  79         memcpy(&hwif->task, task, sizeof(*task));
  80
  81         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  82                 ide_tf_dump(drive->name, tf);
  83                 tp_ops->set_irq(hwif, 1);
  84                 SELECT_MASK(drive, 0);
  85                 tp_ops->tf_load(drive, task);
  86         }
  87
  88         switch (task->data_phase) {
  89         case TASKFILE_MULTI_OUT:
  90         case TASKFILE_OUT:
  91                 tp_ops->exec_command(hwif, tf->command);
  92                 ndelay(400);    /* FIXME */
  93                 return pre_task_out_intr(drive, task->rq);
  94         case TASKFILE_MULTI_IN:
  95         case TASKFILE_IN:
  96                 handler = task_in_intr;
  97                 /* fall-through */
  98         case TASKFILE_NO_DATA:
  99                 if (handler == NULL)
 100                         handler = task_no_data_intr;
 101                 ide_execute_command(drive, tf->command, handler,
 102                                     WAIT_WORSTCASE, NULL);
 103                 return ide_started;
 104         default:
 105                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 106                     dma_ops->dma_setup(drive))
 107                         return ide_stopped;
 108                 dma_ops->dma_exec_cmd(drive, tf->command);
 109                 dma_ops->dma_start(drive);
 110                 return ide_started;
 111         }
 112 }
 113 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 114
 115 /*
 116  * Handler for commands without a data phase
 117  */
 118 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 119 {
 120         ide_hwif_t *hwif = drive->hwif;
 121         ide_task_t *task = &hwif->task;
 122         struct ide_taskfile *tf = &task->tf;
 123         int custom = (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 124         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 125         u8 stat;
 126
 127         local_irq_enable_in_hardirq();
 128
 129         while (1) {
 130                 stat = hwif->tp_ops->read_status(hwif);
 131                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 132                         break;
 133                 udelay(10);
 134         };
 135
 136         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 137                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 138                         drive->mult_req = drive->mult_count = 0;
 139                         drive->special.b.recalibrate = 1;
 140                         (void)ide_dump_status(drive, __func__, stat);
 141                         return ide_stopped;
 142                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 143                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 144                                 ide_set_handler(drive, &task_no_data_intr,
 145                                                 WAIT_WORSTCASE, NULL);
 146                                 return ide_started;
 147                         }
 148                 }
 149                 return ide_error(drive, "task_no_data_intr", stat);
 150                 /* calls ide_end_drive_cmd */
 151         }
 152
 153         if (!custom)
 154                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 155         else if (tf->command == ATA_CMD_SET_MULTI)
 156                 drive->mult_count = drive->mult_req;
 157
 158         return ide_stopped;
 159 }
 160
 161 static u8 wait_drive_not_busy(ide_drive_t *drive)
 162 {
 163         ide_hwif_t *hwif = drive->hwif;
 164         int retries;
 165         u8 stat;
 166
 167         /*
 168          * Last sector was transfered, wait until device is ready.  This can
 169          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 170          */
 171         for (retries = 0; retries < 1000; retries++) {
 172                 stat = hwif->tp_ops->read_status(hwif);
 173
 174                 if (stat & ATA_BUSY)
 175                         udelay(10);
 176                 else
 177                         break;
 178         }
 179
 180         if (stat & ATA_BUSY)
 181                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 182
 183         return stat;
 184 }
 185
 186 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 187                            unsigned int write)
 188 {
 189         ide_hwif_t *hwif = drive->hwif;
 190         struct scatterlist *sg = hwif->sg_table;
 191         struct scatterlist *cursg = hwif->cursg;
 192         struct page *page;
 193 #ifdef CONFIG_HIGHMEM
 194         unsigned long flags;
 195 #endif
 196         unsigned int offset;
 197         u8 *buf;
 198
 199         cursg = hwif->cursg;
 200         if (!cursg) {
 201                 cursg = sg;
 202                 hwif->cursg = sg;
 203         }
 204
 205         page = sg_page(cursg);
 206         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 207
 208         /* get the current page and offset */
 209         page = nth_page(page, (offset >> PAGE_SHIFT));
 210         offset %= PAGE_SIZE;
 211
 212 #ifdef CONFIG_HIGHMEM
 213         local_irq_save(flags);
 214 #endif
 215         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 216
 217         hwif->nleft--;
 218         hwif->cursg_ofs++;
 219
 220         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 221                 hwif->cursg = sg_next(hwif->cursg);
 222                 hwif->cursg_ofs = 0;
 223         }
 224
 225         /* do the actual data transfer */
 226         if (write)
 227                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 228         else
 229                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 230
 231         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 232 #ifdef CONFIG_HIGHMEM
 233         local_irq_restore(flags);
 234 #endif
 235 }
 236
 237 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 238                           unsigned int write)
 239 {
 240         unsigned int nsect;
 241
 242         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 243         while (nsect--)
 244                 ide_pio_sector(drive, rq, write);
 245 }
 246
 247 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 248                                      unsigned int write)
 249 {
 250         u8 saved_io_32bit = drive->io_32bit;
 251
 252         if (rq->bio)    /* fs request */
 253                 rq->errors = 0;
 254
 255         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 256                 ide_task_t *task = rq->special;
 257
 258                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 259                         drive->io_32bit = 0;
 260         }
 261
 262         touch_softlockup_watchdog();
 263
 264         switch (drive->hwif->data_phase) {
 265         case TASKFILE_MULTI_IN:
 266         case TASKFILE_MULTI_OUT:
 267                 ide_pio_multi(drive, rq, write);
 268                 break;
 269         default:
 270                 ide_pio_sector(drive, rq, write);
 271                 break;
 272         }
 273
 274         drive->io_32bit = saved_io_32bit;
 275 }
 276
 277 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 278                                   const char *s, u8 stat)
 279 {
 280         if (rq->bio) {
 281                 ide_hwif_t *hwif = drive->hwif;
 282                 int sectors = hwif->nsect - hwif->nleft;
 283
 284                 switch (hwif->data_phase) {
 285                 case TASKFILE_IN:
 286                         if (hwif->nleft)
 287                                 break;
 288                         /* fall through */
 289                 case TASKFILE_OUT:
 290                         sectors--;
 291                         break;
 292                 case TASKFILE_MULTI_IN:
 293                         if (hwif->nleft)
 294                                 break;
 295                         /* fall through */
 296                 case TASKFILE_MULTI_OUT:
 297                         sectors -= drive->mult_count;
 298                 default:
 299                         break;
 300                 }
 301
 302                 if (sectors > 0) {
 303                         ide_driver_t *drv;
 304
 305                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 306                         drv->end_request(drive, 1, sectors);
 307                 }
 308         }
 309         return ide_error(drive, s, stat);
 310 }
 311
 312 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 313 {
 314         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 315                 u8 err = ide_read_error(drive);
 316
 317                 ide_end_drive_cmd(drive, stat, err);
 318                 return;
 319         }
 320
 321         if (rq->rq_disk) {
 322                 ide_driver_t *drv;
 323
 324                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 325                 drv->end_request(drive, 1, rq->nr_sectors);
 326         } else
 327                 ide_end_request(drive, 1, rq->nr_sectors);
 328 }
 329
 330 /*
 331  * We got an interrupt on a task_in case, but no errors and no DRQ.
 332  *
 333  * It might be a spurious irq (shared irq), but it might be a
 334  * command that had no output.
 335  */
 336 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 337 {
 338         /* Command all done? */
 339         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 340                 task_end_request(drive, rq, stat);
 341                 return ide_stopped;
 342         }
 343
 344         /* Assume it was a spurious irq */
 345         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 346         return ide_started;
 347 }
 348
 349 /*
 350  * Handler for command with PIO data-in phase (Read/Read Multiple).
 351  */
 352 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 353 {
 354         ide_hwif_t *hwif = drive->hwif;
 355         struct request *rq = hwif->hwgroup->rq;
 356         u8 stat = hwif->tp_ops->read_status(hwif);
 357
 358         /* Error? */
 359         if (stat & ATA_ERR)
 360                 return task_error(drive, rq, __func__, stat);
 361
 362         /* Didn't want any data? Odd. */
 363         if ((stat & ATA_DRQ) == 0)
 364                 return task_in_unexpected(drive, rq, stat);
 365
 366         ide_pio_datablock(drive, rq, 0);
 367
 368         /* Are we done? Check status and finish transfer. */
 369         if (!hwif->nleft) {
 370                 stat = wait_drive_not_busy(drive);
 371                 if (!OK_STAT(stat, 0, BAD_STAT))
 372                         return task_error(drive, rq, __func__, stat);
 373                 task_end_request(drive, rq, stat);
 374                 return ide_stopped;
 375         }
 376
 377         /* Still data left to transfer. */
 378         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 379
 380         return ide_started;
 381 }
 382
 383 /*
 384  * Handler for command with PIO data-out phase (Write/Write Multiple).
 385  */
 386 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 387 {
 388         ide_hwif_t *hwif = drive->hwif;
 389         struct request *rq = HWGROUP(drive)->rq;
 390         u8 stat = hwif->tp_ops->read_status(hwif);
 391
 392         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 393                 return task_error(drive, rq, __func__, stat);
 394
 395         /* Deal with unexpected ATA data phase. */
 396         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 397                 return task_error(drive, rq, __func__, stat);
 398
 399         if (!hwif->nleft) {
 400                 task_end_request(drive, rq, stat);
 401                 return ide_stopped;
 402         }
 403
 404         /* Still data left to transfer. */
 405         ide_pio_datablock(drive, rq, 1);
 406         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 407
 408         return ide_started;
 409 }
 410
 411 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 412 {
 413         ide_startstop_t startstop;
 414
 415         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 416                           drive->bad_wstat, WAIT_DRQ)) {
 417                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 418                         drive->name, drive->hwif->data_phase ? "MULT" : "",
 419                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 420                 return startstop;
 421         }
 422
 423         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 424                 local_irq_disable();
 425
 426         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 427         ide_pio_datablock(drive, rq, 1);
 428
 429         return ide_started;
 430 }
 431
 432 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 433 {
 434         struct request *rq;
 435         int error;
 436
 437         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 438         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 439         rq->buffer = buf;
 440
 441         /*
 442          * (ks) We transfer currently only whole sectors.
 443          * This is suffient for now.  But, it would be great,
 444          * if we would find a solution to transfer any size.
 445          * To support special commands like READ LONG.
 446          */
 447         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 448         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 449
 450         if (task->tf_flags & IDE_TFLAG_WRITE)
 451                 rq->cmd_flags |= REQ_RW;
 452
 453         rq->special = task;
 454         task->rq = rq;
 455
 456         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 457         blk_put_request(rq);
 458
 459         return error;
 460 }
 461
 462 EXPORT_SYMBOL(ide_raw_taskfile);
 463
 464 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 465 {
 466         task->data_phase = TASKFILE_NO_DATA;
 467
 468         return ide_raw_taskfile(drive, task, NULL, 0);
 469 }
 470 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 471
 472 #ifdef CONFIG_IDE_TASK_IOCTL
 473 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 474 {
 475         ide_task_request_t      *req_task;
 476         ide_task_t              args;
 477         u8 *outbuf              = NULL;
 478         u8 *inbuf               = NULL;
 479         u8 *data_buf            = NULL;
 480         int err                 = 0;
 481         int tasksize            = sizeof(struct ide_task_request_s);
 482         unsigned int taskin     = 0;
 483         unsigned int taskout    = 0;
 484         u16 nsect               = 0;
 485         char __user *buf = (char __user *)arg;
 486
 487 //      printk("IDE Taskfile ...\n");
 488
 489         req_task = kzalloc(tasksize, GFP_KERNEL);
 490         if (req_task == NULL) return -ENOMEM;
 491         if (copy_from_user(req_task, buf, tasksize)) {
 492                 kfree(req_task);
 493                 return -EFAULT;
 494         }
 495
 496         taskout = req_task->out_size;
 497         taskin  = req_task->in_size;
 498
 499         if (taskin > 65536 || taskout > 65536) {
 500                 err = -EINVAL;
 501                 goto abort;
 502         }
 503
 504         if (taskout) {
 505                 int outtotal = tasksize;
 506                 outbuf = kzalloc(taskout, GFP_KERNEL);
 507                 if (outbuf == NULL) {
 508                         err = -ENOMEM;
 509                         goto abort;
 510                 }
 511                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 512                         err = -EFAULT;
 513                         goto abort;
 514                 }
 515         }
 516
 517         if (taskin) {
 518                 int intotal = tasksize + taskout;
 519                 inbuf = kzalloc(taskin, GFP_KERNEL);
 520                 if (inbuf == NULL) {
 521                         err = -ENOMEM;
 522                         goto abort;
 523                 }
 524                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 525                         err = -EFAULT;
 526                         goto abort;
 527                 }
 528         }
 529
 530         memset(&args, 0, sizeof(ide_task_t));
 531
 532         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 533         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 534
 535         args.data_phase = req_task->data_phase;
 536
 537         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 538                         IDE_TFLAG_IN_TF;
 539         if (drive->dev_flags & IDE_DFLAG_LBA48)
 540                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 541
 542         if (req_task->out_flags.all) {
 543                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 544
 545                 if (req_task->out_flags.b.data)
 546                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 547
 548                 if (req_task->out_flags.b.nsector_hob)
 549                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 550                 if (req_task->out_flags.b.sector_hob)
 551                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 552                 if (req_task->out_flags.b.lcyl_hob)
 553                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 554                 if (req_task->out_flags.b.hcyl_hob)
 555                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 556
 557                 if (req_task->out_flags.b.error_feature)
 558                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 559                 if (req_task->out_flags.b.nsector)
 560                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 561                 if (req_task->out_flags.b.sector)
 562                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 563                 if (req_task->out_flags.b.lcyl)
 564                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 565                 if (req_task->out_flags.b.hcyl)
 566                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 567         } else {
 568                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 569                 if (args.tf_flags & IDE_TFLAG_LBA48)
 570                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 571         }
 572
 573         if (req_task->in_flags.b.data)
 574                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 575
 576         switch(req_task->data_phase) {
 577                 case TASKFILE_MULTI_OUT:
 578                         if (!drive->mult_count) {
 579                                 /* (hs): give up if multcount is not set */
 580                                 printk(KERN_ERR "%s: %s Multimode Write " \
 581                                         "multcount is not set\n",
 582                                         drive->name, __func__);
 583                                 err = -EPERM;
 584                                 goto abort;
 585                         }
 586                         /* fall through */
 587                 case TASKFILE_OUT:
 588                         /* fall through */
 589                 case TASKFILE_OUT_DMAQ:
 590                 case TASKFILE_OUT_DMA:
 591                         nsect = taskout / SECTOR_SIZE;
 592                         data_buf = outbuf;
 593                         break;
 594                 case TASKFILE_MULTI_IN:
 595                         if (!drive->mult_count) {
 596                                 /* (hs): give up if multcount is not set */
 597                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 598                                         "multcount is not set\n",
 599                                         drive->name, __func__);
 600                                 err = -EPERM;
 601                                 goto abort;
 602                         }
 603                         /* fall through */
 604                 case TASKFILE_IN:
 605                         /* fall through */
 606                 case TASKFILE_IN_DMAQ:
 607                 case TASKFILE_IN_DMA:
 608                         nsect = taskin / SECTOR_SIZE;
 609                         data_buf = inbuf;
 610                         break;
 611                 case TASKFILE_NO_DATA:
 612                         break;
 613                 default:
 614                         err = -EFAULT;
 615                         goto abort;
 616         }
 617
 618         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 619                 nsect = 0;
 620         else if (!nsect) {
 621                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 622
 623                 if (!nsect) {
 624                         printk(KERN_ERR "%s: in/out command without data\n",
 625                                         drive->name);
 626                         err = -EFAULT;
 627                         goto abort;
 628                 }
 629         }
 630
 631         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 632                 args.tf_flags |= IDE_TFLAG_WRITE;
 633
 634         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 635
 636         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 637         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 638
 639         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 640             req_task->in_flags.all == 0) {
 641                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 642                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 643                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 644         }
 645
 646         if (copy_to_user(buf, req_task, tasksize)) {
 647                 err = -EFAULT;
 648                 goto abort;
 649         }
 650         if (taskout) {
 651                 int outtotal = tasksize;
 652                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 653                         err = -EFAULT;
 654                         goto abort;
 655                 }
 656         }
 657         if (taskin) {
 658                 int intotal = tasksize + taskout;
 659                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 660                         err = -EFAULT;
 661                         goto abort;
 662                 }
 663         }
 664 abort:
 665         kfree(req_task);
 666         kfree(outbuf);
 667         kfree(inbuf);
 668
 669 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 670
 671         return err;
 672 }
 673 #endif