Pileus Git - ~andy/linux/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/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         struct ide_cmd cmd;
  43
  44         memset(&cmd, 0, sizeof(cmd));
  45         cmd.tf.nsect = 0x01;
  46         if (drive->media == ide_disk)
  47                 cmd.tf.command = ATA_CMD_ID_ATA;
  48         else
  49                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  50         cmd.tf_flags    = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
  51         cmd.data_phase  = TASKFILE_IN;
  52
  53         return ide_raw_taskfile(drive, &cmd, buf, 1);
  54 }
  55
  56 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  57 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  58 static ide_startstop_t task_in_intr(ide_drive_t *);
  59
  60 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  61 {
  62         ide_hwif_t *hwif = drive->hwif;
  63         struct ide_cmd *cmd = &hwif->cmd;
  64         struct ide_taskfile *tf = &cmd->tf;
  65         ide_handler_t *handler = NULL;
  66         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  67         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  68
  69         if (orig_cmd->data_phase == TASKFILE_MULTI_IN ||
  70             orig_cmd->data_phase == TASKFILE_MULTI_OUT) {
  71                 if (!drive->mult_count) {
  72                         printk(KERN_ERR "%s: multimode not set!\n",
  73                                         drive->name);
  74                         return ide_stopped;
  75                 }
  76         }
  77
  78         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  79                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  80
  81         memcpy(cmd, orig_cmd, sizeof(*cmd));
  82
  83         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  84                 ide_tf_dump(drive->name, tf);
  85                 tp_ops->set_irq(hwif, 1);
  86                 SELECT_MASK(drive, 0);
  87                 tp_ops->tf_load(drive, cmd);
  88         }
  89
  90         switch (cmd->data_phase) {
  91         case TASKFILE_MULTI_OUT:
  92         case TASKFILE_OUT:
  93                 tp_ops->exec_command(hwif, tf->command);
  94                 ndelay(400);    /* FIXME */
  95                 return pre_task_out_intr(drive, cmd);
  96         case TASKFILE_MULTI_IN:
  97         case TASKFILE_IN:
  98                 handler = task_in_intr;
  99                 /* fall-through */
 100         case TASKFILE_NO_DATA:
 101                 if (handler == NULL)
 102                         handler = task_no_data_intr;
 103                 ide_execute_command(drive, tf->command, handler,
 104                                     WAIT_WORSTCASE, NULL);
 105                 return ide_started;
 106         default:
 107                 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) == 0 ||
 108                     ide_build_sglist(drive, hwif->rq) == 0 ||
 109                     dma_ops->dma_setup(drive))
 110                         return ide_stopped;
 111                 dma_ops->dma_exec_cmd(drive, tf->command);
 112                 dma_ops->dma_start(drive);
 113                 return ide_started;
 114         }
 115 }
 116 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 117
 118 /*
 119  * Handler for commands without a data phase
 120  */
 121 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 122 {
 123         ide_hwif_t *hwif = drive->hwif;
 124         struct ide_cmd *cmd = &hwif->cmd;
 125         struct ide_taskfile *tf = &cmd->tf;
 126         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 127         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 128         u8 stat;
 129
 130         local_irq_enable_in_hardirq();
 131
 132         while (1) {
 133                 stat = hwif->tp_ops->read_status(hwif);
 134                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 135                         break;
 136                 udelay(10);
 137         };
 138
 139         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 140                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 141                         drive->mult_req = drive->mult_count = 0;
 142                         drive->special.b.recalibrate = 1;
 143                         (void)ide_dump_status(drive, __func__, stat);
 144                         return ide_stopped;
 145                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 146                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 147                                 ide_set_handler(drive, &task_no_data_intr,
 148                                                 WAIT_WORSTCASE, NULL);
 149                                 return ide_started;
 150                         }
 151                 }
 152                 return ide_error(drive, "task_no_data_intr", stat);
 153         }
 154
 155         if (custom && tf->command == ATA_CMD_IDLEIMMEDIATE) {
 156                 hwif->tp_ops->tf_read(drive, cmd);
 157                 if (tf->lbal != 0xc4) {
 158                         printk(KERN_ERR "%s: head unload failed!\n",
 159                                drive->name);
 160                         ide_tf_dump(drive->name, tf);
 161                 } else
 162                         drive->dev_flags |= IDE_DFLAG_PARKED;
 163         } else if (custom && tf->command == ATA_CMD_SET_MULTI)
 164                 drive->mult_count = drive->mult_req;
 165
 166         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE) {
 167                 struct request *rq = hwif->rq;
 168                 u8 err = ide_read_error(drive);
 169
 170                 if (blk_pm_request(rq))
 171                         ide_complete_pm_rq(drive, rq);
 172                 else {
 173                         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE)
 174                                 ide_complete_cmd(drive, cmd, stat, err);
 175                         ide_complete_rq(drive, err);
 176                 }
 177         }
 178
 179         return ide_stopped;
 180 }
 181
 182 static u8 wait_drive_not_busy(ide_drive_t *drive)
 183 {
 184         ide_hwif_t *hwif = drive->hwif;
 185         int retries;
 186         u8 stat;
 187
 188         /*
 189          * Last sector was transfered, wait until device is ready.  This can
 190          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 191          */
 192         for (retries = 0; retries < 1000; retries++) {
 193                 stat = hwif->tp_ops->read_status(hwif);
 194
 195                 if (stat & ATA_BUSY)
 196                         udelay(10);
 197                 else
 198                         break;
 199         }
 200
 201         if (stat & ATA_BUSY)
 202                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 203
 204         return stat;
 205 }
 206
 207 static void ide_pio_sector(ide_drive_t *drive, struct ide_cmd *cmd,
 208                            unsigned int write)
 209 {
 210         ide_hwif_t *hwif = drive->hwif;
 211         struct scatterlist *sg = hwif->sg_table;
 212         struct scatterlist *cursg = hwif->cursg;
 213         struct page *page;
 214 #ifdef CONFIG_HIGHMEM
 215         unsigned long flags;
 216 #endif
 217         unsigned int offset;
 218         u8 *buf;
 219
 220         cursg = hwif->cursg;
 221         if (!cursg) {
 222                 cursg = sg;
 223                 hwif->cursg = sg;
 224         }
 225
 226         page = sg_page(cursg);
 227         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 228
 229         /* get the current page and offset */
 230         page = nth_page(page, (offset >> PAGE_SHIFT));
 231         offset %= PAGE_SIZE;
 232
 233 #ifdef CONFIG_HIGHMEM
 234         local_irq_save(flags);
 235 #endif
 236         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 237
 238         hwif->nleft--;
 239         hwif->cursg_ofs++;
 240
 241         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 242                 hwif->cursg = sg_next(hwif->cursg);
 243                 hwif->cursg_ofs = 0;
 244         }
 245
 246         /* do the actual data transfer */
 247         if (write)
 248                 hwif->tp_ops->output_data(drive, cmd, buf, SECTOR_SIZE);
 249         else
 250                 hwif->tp_ops->input_data(drive, cmd, buf, SECTOR_SIZE);
 251
 252         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 253 #ifdef CONFIG_HIGHMEM
 254         local_irq_restore(flags);
 255 #endif
 256 }
 257
 258 static void ide_pio_multi(ide_drive_t *drive, struct ide_cmd *cmd,
 259                           unsigned int write)
 260 {
 261         unsigned int nsect;
 262
 263         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 264         while (nsect--)
 265                 ide_pio_sector(drive, cmd, write);
 266 }
 267
 268 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 269                               unsigned int write)
 270 {
 271         u8 saved_io_32bit = drive->io_32bit;
 272
 273         if (cmd->tf_flags & IDE_TFLAG_FS)
 274                 cmd->rq->errors = 0;
 275
 276         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 277                 drive->io_32bit = 0;
 278
 279         touch_softlockup_watchdog();
 280
 281         switch (cmd->data_phase) {
 282         case TASKFILE_MULTI_IN:
 283         case TASKFILE_MULTI_OUT:
 284                 ide_pio_multi(drive, cmd, write);
 285                 break;
 286         default:
 287                 ide_pio_sector(drive, cmd, write);
 288                 break;
 289         }
 290
 291         drive->io_32bit = saved_io_32bit;
 292 }
 293
 294 static ide_startstop_t task_error(ide_drive_t *drive, struct ide_cmd *cmd,
 295                                   const char *s, u8 stat)
 296 {
 297         if (cmd->tf_flags & IDE_TFLAG_FS) {
 298                 ide_hwif_t *hwif = drive->hwif;
 299                 int sectors = hwif->nsect - hwif->nleft;
 300
 301                 switch (cmd->data_phase) {
 302                 case TASKFILE_IN:
 303                         if (hwif->nleft)
 304                                 break;
 305                         /* fall through */
 306                 case TASKFILE_OUT:
 307                         sectors--;
 308                         break;
 309                 case TASKFILE_MULTI_IN:
 310                         if (hwif->nleft)
 311                                 break;
 312                         /* fall through */
 313                 case TASKFILE_MULTI_OUT:
 314                         sectors -= drive->mult_count;
 315                 default:
 316                         break;
 317                 }
 318
 319                 if (sectors > 0)
 320                         ide_end_request(drive, 1, sectors);
 321         }
 322         return ide_error(drive, s, stat);
 323 }
 324
 325 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 326 {
 327         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0) {
 328                 u8 err = ide_read_error(drive);
 329
 330                 ide_complete_cmd(drive, cmd, stat, err);
 331                 ide_complete_rq(drive, err);
 332                 return;
 333         }
 334
 335         ide_end_request(drive, 1, cmd->rq->nr_sectors);
 336 }
 337
 338 /*
 339  * We got an interrupt on a task_in case, but no errors and no DRQ.
 340  *
 341  * It might be a spurious irq (shared irq), but it might be a
 342  * command that had no output.
 343  */
 344 static ide_startstop_t task_in_unexpected(ide_drive_t *drive,
 345                                           struct ide_cmd *cmd, u8 stat)
 346 {
 347         /* Command all done? */
 348         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 349                 ide_finish_cmd(drive, cmd, stat);
 350                 return ide_stopped;
 351         }
 352
 353         /* Assume it was a spurious irq */
 354         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 355         return ide_started;
 356 }
 357
 358 /*
 359  * Handler for command with PIO data-in phase (Read/Read Multiple).
 360  */
 361 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 362 {
 363         ide_hwif_t *hwif = drive->hwif;
 364         struct ide_cmd *cmd = &drive->hwif->cmd;
 365         u8 stat = hwif->tp_ops->read_status(hwif);
 366
 367         /* Error? */
 368         if (stat & ATA_ERR)
 369                 return task_error(drive, cmd, __func__, stat);
 370
 371         /* Didn't want any data? Odd. */
 372         if ((stat & ATA_DRQ) == 0)
 373                 return task_in_unexpected(drive, cmd, stat);
 374
 375         ide_pio_datablock(drive, cmd, 0);
 376
 377         /* Are we done? Check status and finish transfer. */
 378         if (!hwif->nleft) {
 379                 stat = wait_drive_not_busy(drive);
 380                 if (!OK_STAT(stat, 0, BAD_STAT))
 381                         return task_error(drive, cmd, __func__, stat);
 382                 ide_finish_cmd(drive, cmd, stat);
 383                 return ide_stopped;
 384         }
 385
 386         /* Still data left to transfer. */
 387         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 388
 389         return ide_started;
 390 }
 391
 392 /*
 393  * Handler for command with PIO data-out phase (Write/Write Multiple).
 394  */
 395 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 396 {
 397         ide_hwif_t *hwif = drive->hwif;
 398         struct ide_cmd *cmd = &drive->hwif->cmd;
 399         u8 stat = hwif->tp_ops->read_status(hwif);
 400
 401         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 402                 return task_error(drive, cmd, __func__, stat);
 403
 404         /* Deal with unexpected ATA data phase. */
 405         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 406                 return task_error(drive, cmd, __func__, stat);
 407
 408         if (!hwif->nleft) {
 409                 ide_finish_cmd(drive, cmd, stat);
 410                 return ide_stopped;
 411         }
 412
 413         /* Still data left to transfer. */
 414         ide_pio_datablock(drive, cmd, 1);
 415         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 416
 417         return ide_started;
 418 }
 419
 420 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 421                                          struct ide_cmd *cmd)
 422 {
 423         ide_startstop_t startstop;
 424
 425         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 426                           drive->bad_wstat, WAIT_DRQ)) {
 427                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 428                         drive->name,
 429                         cmd->data_phase == TASKFILE_MULTI_OUT ? "MULT" : "",
 430                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 431                 return startstop;
 432         }
 433
 434         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 435                 local_irq_disable();
 436
 437         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 438         ide_pio_datablock(drive, cmd, 1);
 439
 440         return ide_started;
 441 }
 442
 443 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 444                      u16 nsect)
 445 {
 446         struct request *rq;
 447         int error;
 448
 449         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 450         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 451         rq->buffer = buf;
 452
 453         /*
 454          * (ks) We transfer currently only whole sectors.
 455          * This is suffient for now.  But, it would be great,
 456          * if we would find a solution to transfer any size.
 457          * To support special commands like READ LONG.
 458          */
 459         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 460         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 461
 462         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 463                 rq->cmd_flags |= REQ_RW;
 464
 465         rq->special = cmd;
 466         cmd->rq = rq;
 467
 468         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 469         blk_put_request(rq);
 470
 471         return error;
 472 }
 473
 474 EXPORT_SYMBOL(ide_raw_taskfile);
 475
 476 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 477 {
 478         cmd->data_phase = TASKFILE_NO_DATA;
 479
 480         return ide_raw_taskfile(drive, cmd, NULL, 0);
 481 }
 482 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 483
 484 #ifdef CONFIG_IDE_TASK_IOCTL
 485 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 486 {
 487         ide_task_request_t      *req_task;
 488         struct ide_cmd          cmd;
 489         u8 *outbuf              = NULL;
 490         u8 *inbuf               = NULL;
 491         u8 *data_buf            = NULL;
 492         int err                 = 0;
 493         int tasksize            = sizeof(struct ide_task_request_s);
 494         unsigned int taskin     = 0;
 495         unsigned int taskout    = 0;
 496         u16 nsect               = 0;
 497         char __user *buf = (char __user *)arg;
 498
 499 //      printk("IDE Taskfile ...\n");
 500
 501         req_task = kzalloc(tasksize, GFP_KERNEL);
 502         if (req_task == NULL) return -ENOMEM;
 503         if (copy_from_user(req_task, buf, tasksize)) {
 504                 kfree(req_task);
 505                 return -EFAULT;
 506         }
 507
 508         taskout = req_task->out_size;
 509         taskin  = req_task->in_size;
 510
 511         if (taskin > 65536 || taskout > 65536) {
 512                 err = -EINVAL;
 513                 goto abort;
 514         }
 515
 516         if (taskout) {
 517                 int outtotal = tasksize;
 518                 outbuf = kzalloc(taskout, GFP_KERNEL);
 519                 if (outbuf == NULL) {
 520                         err = -ENOMEM;
 521                         goto abort;
 522                 }
 523                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 524                         err = -EFAULT;
 525                         goto abort;
 526                 }
 527         }
 528
 529         if (taskin) {
 530                 int intotal = tasksize + taskout;
 531                 inbuf = kzalloc(taskin, GFP_KERNEL);
 532                 if (inbuf == NULL) {
 533                         err = -ENOMEM;
 534                         goto abort;
 535                 }
 536                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 537                         err = -EFAULT;
 538                         goto abort;
 539                 }
 540         }
 541
 542         memset(&cmd, 0, sizeof(cmd));
 543
 544         memcpy(&cmd.tf_array[0], req_task->hob_ports,
 545                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 546         memcpy(&cmd.tf_array[6], req_task->io_ports,
 547                HDIO_DRIVE_TASK_HDR_SIZE);
 548
 549         cmd.data_phase = req_task->data_phase;
 550         cmd.tf_flags   = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 551                          IDE_TFLAG_IN_TF;
 552
 553         if (drive->dev_flags & IDE_DFLAG_LBA48)
 554                 cmd.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 555
 556         if (req_task->out_flags.all) {
 557                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 558
 559                 if (req_task->out_flags.b.data)
 560                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 561
 562                 if (req_task->out_flags.b.nsector_hob)
 563                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 564                 if (req_task->out_flags.b.sector_hob)
 565                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 566                 if (req_task->out_flags.b.lcyl_hob)
 567                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 568                 if (req_task->out_flags.b.hcyl_hob)
 569                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 570
 571                 if (req_task->out_flags.b.error_feature)
 572                         cmd.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 573                 if (req_task->out_flags.b.nsector)
 574                         cmd.tf_flags |= IDE_TFLAG_OUT_NSECT;
 575                 if (req_task->out_flags.b.sector)
 576                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAL;
 577                 if (req_task->out_flags.b.lcyl)
 578                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAM;
 579                 if (req_task->out_flags.b.hcyl)
 580                         cmd.tf_flags |= IDE_TFLAG_OUT_LBAH;
 581         } else {
 582                 cmd.tf_flags |= IDE_TFLAG_OUT_TF;
 583                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 584                         cmd.tf_flags |= IDE_TFLAG_OUT_HOB;
 585         }
 586
 587         if (req_task->in_flags.b.data)
 588                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 589
 590         switch(req_task->data_phase) {
 591                 case TASKFILE_MULTI_OUT:
 592                         if (!drive->mult_count) {
 593                                 /* (hs): give up if multcount is not set */
 594                                 printk(KERN_ERR "%s: %s Multimode Write " \
 595                                         "multcount is not set\n",
 596                                         drive->name, __func__);
 597                                 err = -EPERM;
 598                                 goto abort;
 599                         }
 600                         /* fall through */
 601                 case TASKFILE_OUT:
 602                         /* fall through */
 603                 case TASKFILE_OUT_DMAQ:
 604                 case TASKFILE_OUT_DMA:
 605                         nsect = taskout / SECTOR_SIZE;
 606                         data_buf = outbuf;
 607                         break;
 608                 case TASKFILE_MULTI_IN:
 609                         if (!drive->mult_count) {
 610                                 /* (hs): give up if multcount is not set */
 611                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 612                                         "multcount is not set\n",
 613                                         drive->name, __func__);
 614                                 err = -EPERM;
 615                                 goto abort;
 616                         }
 617                         /* fall through */
 618                 case TASKFILE_IN:
 619                         /* fall through */
 620                 case TASKFILE_IN_DMAQ:
 621                 case TASKFILE_IN_DMA:
 622                         nsect = taskin / SECTOR_SIZE;
 623                         data_buf = inbuf;
 624                         break;
 625                 case TASKFILE_NO_DATA:
 626                         break;
 627                 default:
 628                         err = -EFAULT;
 629                         goto abort;
 630         }
 631
 632         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 633                 nsect = 0;
 634         else if (!nsect) {
 635                 nsect = (cmd.tf.hob_nsect << 8) | cmd.tf.nsect;
 636
 637                 if (!nsect) {
 638                         printk(KERN_ERR "%s: in/out command without data\n",
 639                                         drive->name);
 640                         err = -EFAULT;
 641                         goto abort;
 642                 }
 643         }
 644
 645         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 646                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 647
 648         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 649
 650         memcpy(req_task->hob_ports, &cmd.tf_array[0],
 651                HDIO_DRIVE_HOB_HDR_SIZE - 2);
 652         memcpy(req_task->io_ports, &cmd.tf_array[6],
 653                HDIO_DRIVE_TASK_HDR_SIZE);
 654
 655         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 656             req_task->in_flags.all == 0) {
 657                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 658                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 659                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 660         }
 661
 662         if (copy_to_user(buf, req_task, tasksize)) {
 663                 err = -EFAULT;
 664                 goto abort;
 665         }
 666         if (taskout) {
 667                 int outtotal = tasksize;
 668                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 669                         err = -EFAULT;
 670                         goto abort;
 671                 }
 672         }
 673         if (taskin) {
 674                 int intotal = tasksize + taskout;
 675                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 676                         err = -EFAULT;
 677                         goto abort;
 678                 }
 679         }
 680 abort:
 681         kfree(req_task);
 682         kfree(outbuf);
 683         kfree(inbuf);
 684
 685 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 686
 687         return err;
 688 }
 689 #endif