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 set_geometry_intr(ide_drive_t *);
  57 static ide_startstop_t recal_intr(ide_drive_t *);
  58 static ide_startstop_t set_multmode_intr(ide_drive_t *);
  59 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
  60 static ide_startstop_t task_in_intr(ide_drive_t *);
  61
  62 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
  63 {
  64         ide_hwif_t *hwif        = HWIF(drive);
  65         struct ide_taskfile *tf = &task->tf;
  66         ide_handler_t *handler = NULL;
  67         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  68         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  69
  70         if (task->data_phase == TASKFILE_MULTI_IN ||
  71             task->data_phase == TASKFILE_MULTI_OUT) {
  72                 if (!drive->mult_count) {
  73                         printk(KERN_ERR "%s: multimode not set!\n",
  74                                         drive->name);
  75                         return ide_stopped;
  76                 }
  77         }
  78
  79         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  80                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
  81
  82         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  83                 ide_tf_dump(drive->name, tf);
  84                 tp_ops->set_irq(hwif, 1);
  85                 SELECT_MASK(drive, 0);
  86                 tp_ops->tf_load(drive, task);
  87         }
  88
  89         switch (task->data_phase) {
  90         case TASKFILE_MULTI_OUT:
  91         case TASKFILE_OUT:
  92                 tp_ops->exec_command(hwif, tf->command);
  93                 ndelay(400);    /* FIXME */
  94                 return pre_task_out_intr(drive, task->rq);
  95         case TASKFILE_MULTI_IN:
  96         case TASKFILE_IN:
  97                 handler = task_in_intr;
  98                 /* fall-through */
  99         case TASKFILE_NO_DATA:
 100                 if (handler == NULL)
 101                         handler = task_no_data_intr;
 102                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 103                         switch (tf->command) {
 104                         case ATA_CMD_INIT_DEV_PARAMS:
 105                                 handler = set_geometry_intr;
 106                                 break;
 107                         case ATA_CMD_RESTORE:
 108                                 handler = recal_intr;
 109                                 break;
 110                         case ATA_CMD_SET_MULTI:
 111                                 handler = set_multmode_intr;
 112                                 break;
 113                         }
 114                 }
 115                 ide_execute_command(drive, tf->command, handler,
 116                                     WAIT_WORSTCASE, NULL);
 117                 return ide_started;
 118         default:
 119                 if (drive->using_dma == 0 || dma_ops->dma_setup(drive))
 120                         return ide_stopped;
 121                 dma_ops->dma_exec_cmd(drive, tf->command);
 122                 dma_ops->dma_start(drive);
 123                 return ide_started;
 124         }
 125 }
 126 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 127
 128 /*
 129  * set_multmode_intr() is invoked on completion of a ATA_CMD_SET_MULTI cmd.
 130  */
 131 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 132 {
 133         ide_hwif_t *hwif = drive->hwif;
 134         u8 stat;
 135
 136         local_irq_enable_in_hardirq();
 137         stat = hwif->tp_ops->read_status(hwif);
 138
 139         if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
 140                 drive->mult_count = drive->mult_req;
 141         else {
 142                 drive->mult_req = drive->mult_count = 0;
 143                 drive->special.b.recalibrate = 1;
 144                 (void) ide_dump_status(drive, "set_multmode", stat);
 145         }
 146         return ide_stopped;
 147 }
 148
 149 /*
 150  * set_geometry_intr() is invoked on completion of a ATA_CMD_INIT_DEV_PARAMS cmd.
 151  */
 152 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 153 {
 154         ide_hwif_t *hwif = drive->hwif;
 155         int retries = 5;
 156         u8 stat;
 157
 158         local_irq_enable_in_hardirq();
 159
 160         while (1) {
 161                 stat = hwif->tp_ops->read_status(hwif);
 162                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 163                         break;
 164                 udelay(10);
 165         };
 166
 167         if (OK_STAT(stat, ATA_DRDY, BAD_STAT))
 168                 return ide_stopped;
 169
 170         if (stat & (ATA_ERR | ATA_DRQ))
 171                 return ide_error(drive, "set_geometry_intr", stat);
 172
 173         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 174         return ide_started;
 175 }
 176
 177 /*
 178  * recal_intr() is invoked on completion of a ATA_CMD_RESTORE (recalibrate) cmd.
 179  */
 180 static ide_startstop_t recal_intr(ide_drive_t *drive)
 181 {
 182         ide_hwif_t *hwif = drive->hwif;
 183         u8 stat;
 184
 185         local_irq_enable_in_hardirq();
 186         stat = hwif->tp_ops->read_status(hwif);
 187
 188         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
 189                 return ide_error(drive, "recal_intr", stat);
 190         return ide_stopped;
 191 }
 192
 193 /*
 194  * Handler for commands without a data phase
 195  */
 196 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 197 {
 198         ide_hwif_t *hwif = drive->hwif;
 199         ide_task_t *args = hwif->hwgroup->rq->special;
 200         u8 stat;
 201
 202         local_irq_enable_in_hardirq();
 203         stat = hwif->tp_ops->read_status(hwif);
 204
 205         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT))
 206                 return ide_error(drive, "task_no_data_intr", stat);
 207                 /* calls ide_end_drive_cmd */
 208
 209         if (args)
 210                 ide_end_drive_cmd(drive, stat, ide_read_error(drive));
 211
 212         return ide_stopped;
 213 }
 214
 215 static u8 wait_drive_not_busy(ide_drive_t *drive)
 216 {
 217         ide_hwif_t *hwif = drive->hwif;
 218         int retries;
 219         u8 stat;
 220
 221         /*
 222          * Last sector was transfered, wait until device is ready.  This can
 223          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 224          */
 225         for (retries = 0; retries < 1000; retries++) {
 226                 stat = hwif->tp_ops->read_status(hwif);
 227
 228                 if (stat & ATA_BUSY)
 229                         udelay(10);
 230                 else
 231                         break;
 232         }
 233
 234         if (stat & ATA_BUSY)
 235                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 236
 237         return stat;
 238 }
 239
 240 static void ide_pio_sector(ide_drive_t *drive, struct request *rq,
 241                            unsigned int write)
 242 {
 243         ide_hwif_t *hwif = drive->hwif;
 244         struct scatterlist *sg = hwif->sg_table;
 245         struct scatterlist *cursg = hwif->cursg;
 246         struct page *page;
 247 #ifdef CONFIG_HIGHMEM
 248         unsigned long flags;
 249 #endif
 250         unsigned int offset;
 251         u8 *buf;
 252
 253         cursg = hwif->cursg;
 254         if (!cursg) {
 255                 cursg = sg;
 256                 hwif->cursg = sg;
 257         }
 258
 259         page = sg_page(cursg);
 260         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 261
 262         /* get the current page and offset */
 263         page = nth_page(page, (offset >> PAGE_SHIFT));
 264         offset %= PAGE_SIZE;
 265
 266 #ifdef CONFIG_HIGHMEM
 267         local_irq_save(flags);
 268 #endif
 269         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 270
 271         hwif->nleft--;
 272         hwif->cursg_ofs++;
 273
 274         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 275                 hwif->cursg = sg_next(hwif->cursg);
 276                 hwif->cursg_ofs = 0;
 277         }
 278
 279         /* do the actual data transfer */
 280         if (write)
 281                 hwif->tp_ops->output_data(drive, rq, buf, SECTOR_SIZE);
 282         else
 283                 hwif->tp_ops->input_data(drive, rq, buf, SECTOR_SIZE);
 284
 285         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 286 #ifdef CONFIG_HIGHMEM
 287         local_irq_restore(flags);
 288 #endif
 289 }
 290
 291 static void ide_pio_multi(ide_drive_t *drive, struct request *rq,
 292                           unsigned int write)
 293 {
 294         unsigned int nsect;
 295
 296         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 297         while (nsect--)
 298                 ide_pio_sector(drive, rq, write);
 299 }
 300
 301 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 302                                      unsigned int write)
 303 {
 304         u8 saved_io_32bit = drive->io_32bit;
 305
 306         if (rq->bio)    /* fs request */
 307                 rq->errors = 0;
 308
 309         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 310                 ide_task_t *task = rq->special;
 311
 312                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 313                         drive->io_32bit = 0;
 314         }
 315
 316         touch_softlockup_watchdog();
 317
 318         switch (drive->hwif->data_phase) {
 319         case TASKFILE_MULTI_IN:
 320         case TASKFILE_MULTI_OUT:
 321                 ide_pio_multi(drive, rq, write);
 322                 break;
 323         default:
 324                 ide_pio_sector(drive, rq, write);
 325                 break;
 326         }
 327
 328         drive->io_32bit = saved_io_32bit;
 329 }
 330
 331 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 332                                   const char *s, u8 stat)
 333 {
 334         if (rq->bio) {
 335                 ide_hwif_t *hwif = drive->hwif;
 336                 int sectors = hwif->nsect - hwif->nleft;
 337
 338                 switch (hwif->data_phase) {
 339                 case TASKFILE_IN:
 340                         if (hwif->nleft)
 341                                 break;
 342                         /* fall through */
 343                 case TASKFILE_OUT:
 344                         sectors--;
 345                         break;
 346                 case TASKFILE_MULTI_IN:
 347                         if (hwif->nleft)
 348                                 break;
 349                         /* fall through */
 350                 case TASKFILE_MULTI_OUT:
 351                         sectors -= drive->mult_count;
 352                 default:
 353                         break;
 354                 }
 355
 356                 if (sectors > 0) {
 357                         ide_driver_t *drv;
 358
 359                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 360                         drv->end_request(drive, 1, sectors);
 361                 }
 362         }
 363         return ide_error(drive, s, stat);
 364 }
 365
 366 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 367 {
 368         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 369                 u8 err = ide_read_error(drive);
 370
 371                 ide_end_drive_cmd(drive, stat, err);
 372                 return;
 373         }
 374
 375         if (rq->rq_disk) {
 376                 ide_driver_t *drv;
 377
 378                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 379                 drv->end_request(drive, 1, rq->nr_sectors);
 380         } else
 381                 ide_end_request(drive, 1, rq->nr_sectors);
 382 }
 383
 384 /*
 385  * We got an interrupt on a task_in case, but no errors and no DRQ.
 386  *
 387  * It might be a spurious irq (shared irq), but it might be a
 388  * command that had no output.
 389  */
 390 static ide_startstop_t task_in_unexpected(ide_drive_t *drive, struct request *rq, u8 stat)
 391 {
 392         /* Command all done? */
 393         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY)) {
 394                 task_end_request(drive, rq, stat);
 395                 return ide_stopped;
 396         }
 397
 398         /* Assume it was a spurious irq */
 399         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 400         return ide_started;
 401 }
 402
 403 /*
 404  * Handler for command with PIO data-in phase (Read/Read Multiple).
 405  */
 406 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 407 {
 408         ide_hwif_t *hwif = drive->hwif;
 409         struct request *rq = hwif->hwgroup->rq;
 410         u8 stat = hwif->tp_ops->read_status(hwif);
 411
 412         /* Error? */
 413         if (stat & ATA_ERR)
 414                 return task_error(drive, rq, __func__, stat);
 415
 416         /* Didn't want any data? Odd. */
 417         if ((stat & ATA_DRQ) == 0)
 418                 return task_in_unexpected(drive, rq, stat);
 419
 420         ide_pio_datablock(drive, rq, 0);
 421
 422         /* Are we done? Check status and finish transfer. */
 423         if (!hwif->nleft) {
 424                 stat = wait_drive_not_busy(drive);
 425                 if (!OK_STAT(stat, 0, BAD_STAT))
 426                         return task_error(drive, rq, __func__, stat);
 427                 task_end_request(drive, rq, stat);
 428                 return ide_stopped;
 429         }
 430
 431         /* Still data left to transfer. */
 432         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 433
 434         return ide_started;
 435 }
 436
 437 /*
 438  * Handler for command with PIO data-out phase (Write/Write Multiple).
 439  */
 440 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 441 {
 442         ide_hwif_t *hwif = drive->hwif;
 443         struct request *rq = HWGROUP(drive)->rq;
 444         u8 stat = hwif->tp_ops->read_status(hwif);
 445
 446         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 447                 return task_error(drive, rq, __func__, stat);
 448
 449         /* Deal with unexpected ATA data phase. */
 450         if (((stat & ATA_DRQ) == 0) ^ !hwif->nleft)
 451                 return task_error(drive, rq, __func__, stat);
 452
 453         if (!hwif->nleft) {
 454                 task_end_request(drive, rq, stat);
 455                 return ide_stopped;
 456         }
 457
 458         /* Still data left to transfer. */
 459         ide_pio_datablock(drive, rq, 1);
 460         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 461
 462         return ide_started;
 463 }
 464
 465 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 466 {
 467         ide_startstop_t startstop;
 468
 469         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 470                           drive->bad_wstat, WAIT_DRQ)) {
 471                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 472                                 drive->name,
 473                                 drive->hwif->data_phase ? "MULT" : "",
 474                                 drive->addressing ? "_EXT" : "");
 475                 return startstop;
 476         }
 477
 478         if (!drive->unmask)
 479                 local_irq_disable();
 480
 481         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 482         ide_pio_datablock(drive, rq, 1);
 483
 484         return ide_started;
 485 }
 486
 487 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 488 {
 489         struct request *rq;
 490         int error;
 491
 492         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 493         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 494         rq->buffer = buf;
 495
 496         /*
 497          * (ks) We transfer currently only whole sectors.
 498          * This is suffient for now.  But, it would be great,
 499          * if we would find a solution to transfer any size.
 500          * To support special commands like READ LONG.
 501          */
 502         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 503         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 504
 505         if (task->tf_flags & IDE_TFLAG_WRITE)
 506                 rq->cmd_flags |= REQ_RW;
 507
 508         rq->special = task;
 509         task->rq = rq;
 510
 511         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 512         blk_put_request(rq);
 513
 514         return error;
 515 }
 516
 517 EXPORT_SYMBOL(ide_raw_taskfile);
 518
 519 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 520 {
 521         task->data_phase = TASKFILE_NO_DATA;
 522
 523         return ide_raw_taskfile(drive, task, NULL, 0);
 524 }
 525 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 526
 527 #ifdef CONFIG_IDE_TASK_IOCTL
 528 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 529 {
 530         ide_task_request_t      *req_task;
 531         ide_task_t              args;
 532         u8 *outbuf              = NULL;
 533         u8 *inbuf               = NULL;
 534         u8 *data_buf            = NULL;
 535         int err                 = 0;
 536         int tasksize            = sizeof(struct ide_task_request_s);
 537         unsigned int taskin     = 0;
 538         unsigned int taskout    = 0;
 539         u16 nsect               = 0;
 540         char __user *buf = (char __user *)arg;
 541
 542 //      printk("IDE Taskfile ...\n");
 543
 544         req_task = kzalloc(tasksize, GFP_KERNEL);
 545         if (req_task == NULL) return -ENOMEM;
 546         if (copy_from_user(req_task, buf, tasksize)) {
 547                 kfree(req_task);
 548                 return -EFAULT;
 549         }
 550
 551         taskout = req_task->out_size;
 552         taskin  = req_task->in_size;
 553
 554         if (taskin > 65536 || taskout > 65536) {
 555                 err = -EINVAL;
 556                 goto abort;
 557         }
 558
 559         if (taskout) {
 560                 int outtotal = tasksize;
 561                 outbuf = kzalloc(taskout, GFP_KERNEL);
 562                 if (outbuf == NULL) {
 563                         err = -ENOMEM;
 564                         goto abort;
 565                 }
 566                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 567                         err = -EFAULT;
 568                         goto abort;
 569                 }
 570         }
 571
 572         if (taskin) {
 573                 int intotal = tasksize + taskout;
 574                 inbuf = kzalloc(taskin, GFP_KERNEL);
 575                 if (inbuf == NULL) {
 576                         err = -ENOMEM;
 577                         goto abort;
 578                 }
 579                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 580                         err = -EFAULT;
 581                         goto abort;
 582                 }
 583         }
 584
 585         memset(&args, 0, sizeof(ide_task_t));
 586
 587         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 588         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 589
 590         args.data_phase = req_task->data_phase;
 591
 592         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 593                         IDE_TFLAG_IN_TF;
 594         if (drive->addressing == 1)
 595                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 596
 597         if (req_task->out_flags.all) {
 598                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 599
 600                 if (req_task->out_flags.b.data)
 601                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 602
 603                 if (req_task->out_flags.b.nsector_hob)
 604                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 605                 if (req_task->out_flags.b.sector_hob)
 606                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 607                 if (req_task->out_flags.b.lcyl_hob)
 608                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 609                 if (req_task->out_flags.b.hcyl_hob)
 610                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 611
 612                 if (req_task->out_flags.b.error_feature)
 613                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 614                 if (req_task->out_flags.b.nsector)
 615                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 616                 if (req_task->out_flags.b.sector)
 617                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 618                 if (req_task->out_flags.b.lcyl)
 619                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 620                 if (req_task->out_flags.b.hcyl)
 621                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 622         } else {
 623                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 624                 if (args.tf_flags & IDE_TFLAG_LBA48)
 625                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 626         }
 627
 628         if (req_task->in_flags.b.data)
 629                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 630
 631         switch(req_task->data_phase) {
 632                 case TASKFILE_MULTI_OUT:
 633                         if (!drive->mult_count) {
 634                                 /* (hs): give up if multcount is not set */
 635                                 printk(KERN_ERR "%s: %s Multimode Write " \
 636                                         "multcount is not set\n",
 637                                         drive->name, __func__);
 638                                 err = -EPERM;
 639                                 goto abort;
 640                         }
 641                         /* fall through */
 642                 case TASKFILE_OUT:
 643                         /* fall through */
 644                 case TASKFILE_OUT_DMAQ:
 645                 case TASKFILE_OUT_DMA:
 646                         nsect = taskout / SECTOR_SIZE;
 647                         data_buf = outbuf;
 648                         break;
 649                 case TASKFILE_MULTI_IN:
 650                         if (!drive->mult_count) {
 651                                 /* (hs): give up if multcount is not set */
 652                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 653                                         "multcount is not set\n",
 654                                         drive->name, __func__);
 655                                 err = -EPERM;
 656                                 goto abort;
 657                         }
 658                         /* fall through */
 659                 case TASKFILE_IN:
 660                         /* fall through */
 661                 case TASKFILE_IN_DMAQ:
 662                 case TASKFILE_IN_DMA:
 663                         nsect = taskin / SECTOR_SIZE;
 664                         data_buf = inbuf;
 665                         break;
 666                 case TASKFILE_NO_DATA:
 667                         break;
 668                 default:
 669                         err = -EFAULT;
 670                         goto abort;
 671         }
 672
 673         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 674                 nsect = 0;
 675         else if (!nsect) {
 676                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 677
 678                 if (!nsect) {
 679                         printk(KERN_ERR "%s: in/out command without data\n",
 680                                         drive->name);
 681                         err = -EFAULT;
 682                         goto abort;
 683                 }
 684         }
 685
 686         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 687                 args.tf_flags |= IDE_TFLAG_WRITE;
 688
 689         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 690
 691         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 692         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 693
 694         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 695             req_task->in_flags.all == 0) {
 696                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 697                 if (drive->addressing == 1)
 698                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 699         }
 700
 701         if (copy_to_user(buf, req_task, tasksize)) {
 702                 err = -EFAULT;
 703                 goto abort;
 704         }
 705         if (taskout) {
 706                 int outtotal = tasksize;
 707                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 708                         err = -EFAULT;
 709                         goto abort;
 710                 }
 711         }
 712         if (taskin) {
 713                 int intotal = tasksize + taskout;
 714                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 715                         err = -EFAULT;
 716                         goto abort;
 717                 }
 718         }
 719 abort:
 720         kfree(req_task);
 721         kfree(outbuf);
 722         kfree(inbuf);
 723
 724 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 725
 726         return err;
 727 }
 728 #endif
 729
 730 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 731 {
 732         u8 *buf = NULL;
 733         int bufsize = 0, err = 0;
 734         u8 args[4], xfer_rate = 0;
 735         ide_task_t tfargs;
 736         struct ide_taskfile *tf = &tfargs.tf;
 737         u16 *id = drive->id;
 738
 739         if (NULL == (void *) arg) {
 740                 struct request *rq;
 741
 742                 rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 743                 rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 744                 err = blk_execute_rq(drive->queue, NULL, rq, 0);
 745                 blk_put_request(rq);
 746
 747                 return err;
 748         }
 749
 750         if (copy_from_user(args, (void __user *)arg, 4))
 751                 return -EFAULT;
 752
 753         memset(&tfargs, 0, sizeof(ide_task_t));
 754         tf->feature = args[2];
 755         if (args[0] == ATA_CMD_SMART) {
 756                 tf->nsect = args[3];
 757                 tf->lbal  = args[1];
 758                 tf->lbam  = 0x4f;
 759                 tf->lbah  = 0xc2;
 760                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 761         } else {
 762                 tf->nsect = args[1];
 763                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 764                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 765         }
 766         tf->command = args[0];
 767         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 768
 769         if (args[3]) {
 770                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 771                 bufsize = SECTOR_SIZE * args[3];
 772                 buf = kzalloc(bufsize, GFP_KERNEL);
 773                 if (buf == NULL)
 774                         return -ENOMEM;
 775         }
 776
 777         if (tf->command == ATA_CMD_SET_FEATURES &&
 778             tf->feature == SETFEATURES_XFER &&
 779             tf->nsect >= XFER_SW_DMA_0 &&
 780             (id[ATA_ID_UDMA_MODES] ||
 781              id[ATA_ID_MWDMA_MODES] ||
 782              id[ATA_ID_SWDMA_MODES])) {
 783                 xfer_rate = args[1];
 784                 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 785                         printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 786                                             "be set\n", drive->name);
 787                         goto abort;
 788                 }
 789         }
 790
 791         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 792
 793         args[0] = tf->status;
 794         args[1] = tf->error;
 795         args[2] = tf->nsect;
 796
 797         if (!err && xfer_rate) {
 798                 /* active-retuning-calls future */
 799                 ide_set_xfer_rate(drive, xfer_rate);
 800                 ide_driveid_update(drive);
 801         }
 802 abort:
 803         if (copy_to_user((void __user *)arg, &args, 4))
 804                 err = -EFAULT;
 805         if (buf) {
 806                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 807                         err = -EFAULT;
 808                 kfree(buf);
 809         }
 810         return err;
 811 }
 812
 813 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 814 {
 815         void __user *p = (void __user *)arg;
 816         int err = 0;
 817         u8 args[7];
 818         ide_task_t task;
 819
 820         if (copy_from_user(args, p, 7))
 821                 return -EFAULT;
 822
 823         memset(&task, 0, sizeof(task));
 824         memcpy(&task.tf_array[7], &args[1], 6);
 825         task.tf.command = args[0];
 826         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 827
 828         err = ide_no_data_taskfile(drive, &task);
 829
 830         args[0] = task.tf.command;
 831         memcpy(&args[1], &task.tf_array[7], 6);
 832
 833         if (copy_to_user(p, args, 7))
 834                 err = -EFAULT;
 835
 836         return err;
 837 }