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_cmd *cmd)
  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, cmd->tf.feature, cmd->tf.nsect,
  32                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  33                cmd->tf.device, cmd->tf.command);
  34         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  35                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  36 #endif
  37 }
  38
  39 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  40 {
  41         struct ide_cmd cmd;
  42
  43         memset(&cmd, 0, sizeof(cmd));
  44         cmd.tf.nsect = 0x01;
  45         if (drive->media == ide_disk)
  46                 cmd.tf.command = ATA_CMD_ID_ATA;
  47         else
  48                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  49         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  50         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  51         cmd.protocol = ATA_PROT_PIO;
  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_pio_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->protocol == ATA_PROT_PIO &&
  70             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  71             drive->mult_count == 0) {
  72                 printk(KERN_ERR "%s: multimode not set!\n", drive->name);
  73                 return ide_stopped;
  74         }
  75
  76         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  77                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  78
  79         memcpy(cmd, orig_cmd, sizeof(*cmd));
  80
  81         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  82                 ide_tf_dump(drive->name, cmd);
  83                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  84                 SELECT_MASK(drive, 0);
  85
  86                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
  87                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
  88
  89                         tp_ops->output_data(drive, cmd, data, 2);
  90                 }
  91
  92                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
  93                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
  94                                   0xE0 : 0xEF;
  95
  96                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
  97                                 cmd->tf.device &= HIHI;
  98                         cmd->tf.device |= drive->select;
  99                 }
 100
 101                 tp_ops->tf_load(drive, cmd);
 102         }
 103
 104         switch (cmd->protocol) {
 105         case ATA_PROT_PIO:
 106                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 107                         tp_ops->exec_command(hwif, tf->command);
 108                         ndelay(400);    /* FIXME */
 109                         return pre_task_out_intr(drive, cmd);
 110                 }
 111                 handler = task_pio_intr;
 112                 /* fall-through */
 113         case ATA_PROT_NODATA:
 114                 if (handler == NULL)
 115                         handler = task_no_data_intr;
 116                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 117                 return ide_started;
 118         case ATA_PROT_DMA:
 119                 if (ide_dma_prepare(drive, cmd))
 120                         return ide_stopped;
 121                 hwif->expiry = dma_ops->dma_timer_expiry;
 122                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 123                 dma_ops->dma_start(drive);
 124         default:
 125                 return ide_started;
 126         }
 127 }
 128 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 129
 130 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 131 {
 132         ide_hwif_t *hwif = drive->hwif;
 133         struct ide_cmd *cmd = &hwif->cmd;
 134         struct ide_taskfile *tf = &cmd->tf;
 135         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 136         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 137         u8 stat;
 138
 139         local_irq_enable_in_hardirq();
 140
 141         while (1) {
 142                 stat = hwif->tp_ops->read_status(hwif);
 143                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 144                         break;
 145                 udelay(10);
 146         };
 147
 148         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 149                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 150                         drive->mult_req = drive->mult_count = 0;
 151                         drive->special.b.recalibrate = 1;
 152                         (void)ide_dump_status(drive, __func__, stat);
 153                         return ide_stopped;
 154                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 155                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 156                                 ide_set_handler(drive, &task_no_data_intr,
 157                                                 WAIT_WORSTCASE);
 158                                 return ide_started;
 159                         }
 160                 }
 161                 return ide_error(drive, "task_no_data_intr", stat);
 162         }
 163
 164         if (custom && tf->command == ATA_CMD_SET_MULTI)
 165                 drive->mult_count = drive->mult_req;
 166
 167         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 168             tf->command == ATA_CMD_CHK_POWER) {
 169                 struct request *rq = hwif->rq;
 170
 171                 if (blk_pm_request(rq))
 172                         ide_complete_pm_rq(drive, rq);
 173                 else
 174                         ide_finish_cmd(drive, cmd, stat);
 175         }
 176
 177         return ide_stopped;
 178 }
 179
 180 static u8 wait_drive_not_busy(ide_drive_t *drive)
 181 {
 182         ide_hwif_t *hwif = drive->hwif;
 183         int retries;
 184         u8 stat;
 185
 186         /*
 187          * Last sector was transfered, wait until device is ready.  This can
 188          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 189          */
 190         for (retries = 0; retries < 1000; retries++) {
 191                 stat = hwif->tp_ops->read_status(hwif);
 192
 193                 if (stat & ATA_BUSY)
 194                         udelay(10);
 195                 else
 196                         break;
 197         }
 198
 199         if (stat & ATA_BUSY)
 200                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 201
 202         return stat;
 203 }
 204
 205 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 206                    unsigned int write, unsigned int len)
 207 {
 208         ide_hwif_t *hwif = drive->hwif;
 209         struct scatterlist *sg = hwif->sg_table;
 210         struct scatterlist *cursg = cmd->cursg;
 211         struct page *page;
 212         unsigned long flags;
 213         unsigned int offset;
 214         u8 *buf;
 215
 216         cursg = cmd->cursg;
 217         if (cursg == NULL)
 218                 cursg = cmd->cursg = sg;
 219
 220         while (len) {
 221                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 222
 223                 if (nr_bytes > PAGE_SIZE)
 224                         nr_bytes = PAGE_SIZE;
 225
 226                 page = sg_page(cursg);
 227                 offset = cursg->offset + cmd->cursg_ofs;
 228
 229                 /* get the current page and offset */
 230                 page = nth_page(page, (offset >> PAGE_SHIFT));
 231                 offset %= PAGE_SIZE;
 232
 233                 if (PageHighMem(page))
 234                         local_irq_save(flags);
 235
 236                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 237
 238                 cmd->nleft -= nr_bytes;
 239                 cmd->cursg_ofs += nr_bytes;
 240
 241                 if (cmd->cursg_ofs == cursg->length) {
 242                         cursg = cmd->cursg = sg_next(cmd->cursg);
 243                         cmd->cursg_ofs = 0;
 244                 }
 245
 246                 /* do the actual data transfer */
 247                 if (write)
 248                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 249                 else
 250                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 251
 252                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 253
 254                 if (PageHighMem(page))
 255                         local_irq_restore(flags);
 256
 257                 len -= nr_bytes;
 258         }
 259 }
 260 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 261
 262 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 263                               unsigned int write)
 264 {
 265         unsigned int nr_bytes;
 266
 267         u8 saved_io_32bit = drive->io_32bit;
 268
 269         if (cmd->tf_flags & IDE_TFLAG_FS)
 270                 cmd->rq->errors = 0;
 271
 272         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 273                 drive->io_32bit = 0;
 274
 275         touch_softlockup_watchdog();
 276
 277         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 278                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 279         else
 280                 nr_bytes = SECTOR_SIZE;
 281
 282         ide_pio_bytes(drive, cmd, write, nr_bytes);
 283
 284         drive->io_32bit = saved_io_32bit;
 285 }
 286
 287 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 288 {
 289         if (cmd->tf_flags & IDE_TFLAG_FS) {
 290                 int nr_bytes = cmd->nbytes - cmd->nleft;
 291
 292                 if (cmd->protocol == ATA_PROT_PIO &&
 293                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 294                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 295                                 nr_bytes -= drive->mult_count << 9;
 296                         else
 297                                 nr_bytes -= SECTOR_SIZE;
 298                 }
 299
 300                 if (nr_bytes > 0)
 301                         ide_complete_rq(drive, 0, nr_bytes);
 302         }
 303 }
 304
 305 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 306 {
 307         struct request *rq = drive->hwif->rq;
 308         u8 err = ide_read_error(drive);
 309
 310         ide_complete_cmd(drive, cmd, stat, err);
 311         rq->errors = err;
 312         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 313 }
 314
 315 /*
 316  * Handler for command with PIO data phase.
 317  */
 318 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 319 {
 320         ide_hwif_t *hwif = drive->hwif;
 321         struct ide_cmd *cmd = &drive->hwif->cmd;
 322         u8 stat = hwif->tp_ops->read_status(hwif);
 323         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 324
 325         if (write == 0) {
 326                 /* Error? */
 327                 if (stat & ATA_ERR)
 328                         goto out_err;
 329
 330                 /* Didn't want any data? Odd. */
 331                 if ((stat & ATA_DRQ) == 0) {
 332                         /* Command all done? */
 333                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 334                                 goto out_end;
 335
 336                         /* Assume it was a spurious irq */
 337                         goto out_wait;
 338                 }
 339         } else {
 340                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 341                         goto out_err;
 342
 343                 /* Deal with unexpected ATA data phase. */
 344                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 345                         goto out_err;
 346         }
 347
 348         if (write && cmd->nleft == 0)
 349                 goto out_end;
 350
 351         /* Still data left to transfer. */
 352         ide_pio_datablock(drive, cmd, write);
 353
 354         /* Are we done? Check status and finish transfer. */
 355         if (write == 0 && cmd->nleft == 0) {
 356                 stat = wait_drive_not_busy(drive);
 357                 if (!OK_STAT(stat, 0, BAD_STAT))
 358                         goto out_err;
 359
 360                 goto out_end;
 361         }
 362 out_wait:
 363         /* Still data left to transfer. */
 364         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 365         return ide_started;
 366 out_end:
 367         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 368                 ide_finish_cmd(drive, cmd, stat);
 369         else
 370                 ide_complete_rq(drive, 0, cmd->rq->nr_sectors << 9);
 371         return ide_stopped;
 372 out_err:
 373         ide_error_cmd(drive, cmd);
 374         return ide_error(drive, __func__, stat);
 375 }
 376
 377 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 378                                          struct ide_cmd *cmd)
 379 {
 380         ide_startstop_t startstop;
 381
 382         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 383                           drive->bad_wstat, WAIT_DRQ)) {
 384                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 385                         drive->name,
 386                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 387                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 388                 return startstop;
 389         }
 390
 391         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 392                 local_irq_disable();
 393
 394         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 395
 396         ide_pio_datablock(drive, cmd, 1);
 397
 398         return ide_started;
 399 }
 400
 401 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 402                      u16 nsect)
 403 {
 404         struct request *rq;
 405         int error;
 406
 407         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 408         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 409         rq->buffer = buf;
 410
 411         /*
 412          * (ks) We transfer currently only whole sectors.
 413          * This is suffient for now.  But, it would be great,
 414          * if we would find a solution to transfer any size.
 415          * To support special commands like READ LONG.
 416          */
 417         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 418         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 419
 420         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 421                 rq->cmd_flags |= REQ_RW;
 422
 423         rq->special = cmd;
 424         cmd->rq = rq;
 425
 426         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 427         blk_put_request(rq);
 428
 429         return error;
 430 }
 431
 432 EXPORT_SYMBOL(ide_raw_taskfile);
 433
 434 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 435 {
 436         cmd->protocol = ATA_PROT_NODATA;
 437
 438         return ide_raw_taskfile(drive, cmd, NULL, 0);
 439 }
 440 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 441
 442 #ifdef CONFIG_IDE_TASK_IOCTL
 443 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 444 {
 445         ide_task_request_t      *req_task;
 446         struct ide_cmd          cmd;
 447         u8 *outbuf              = NULL;
 448         u8 *inbuf               = NULL;
 449         u8 *data_buf            = NULL;
 450         int err                 = 0;
 451         int tasksize            = sizeof(struct ide_task_request_s);
 452         unsigned int taskin     = 0;
 453         unsigned int taskout    = 0;
 454         u16 nsect               = 0;
 455         char __user *buf = (char __user *)arg;
 456
 457 //      printk("IDE Taskfile ...\n");
 458
 459         req_task = kzalloc(tasksize, GFP_KERNEL);
 460         if (req_task == NULL) return -ENOMEM;
 461         if (copy_from_user(req_task, buf, tasksize)) {
 462                 kfree(req_task);
 463                 return -EFAULT;
 464         }
 465
 466         taskout = req_task->out_size;
 467         taskin  = req_task->in_size;
 468
 469         if (taskin > 65536 || taskout > 65536) {
 470                 err = -EINVAL;
 471                 goto abort;
 472         }
 473
 474         if (taskout) {
 475                 int outtotal = tasksize;
 476                 outbuf = kzalloc(taskout, GFP_KERNEL);
 477                 if (outbuf == NULL) {
 478                         err = -ENOMEM;
 479                         goto abort;
 480                 }
 481                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 482                         err = -EFAULT;
 483                         goto abort;
 484                 }
 485         }
 486
 487         if (taskin) {
 488                 int intotal = tasksize + taskout;
 489                 inbuf = kzalloc(taskin, GFP_KERNEL);
 490                 if (inbuf == NULL) {
 491                         err = -ENOMEM;
 492                         goto abort;
 493                 }
 494                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 495                         err = -EFAULT;
 496                         goto abort;
 497                 }
 498         }
 499
 500         memset(&cmd, 0, sizeof(cmd));
 501
 502         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 503         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 504
 505         cmd.valid.out.tf = IDE_VALID_DEVICE;
 506         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 507         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 508
 509         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 510                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 511                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 512         }
 513
 514         if (req_task->out_flags.all) {
 515                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 516
 517                 if (req_task->out_flags.b.data)
 518                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 519
 520                 if (req_task->out_flags.b.nsector_hob)
 521                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 522                 if (req_task->out_flags.b.sector_hob)
 523                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 524                 if (req_task->out_flags.b.lcyl_hob)
 525                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 526                 if (req_task->out_flags.b.hcyl_hob)
 527                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 528
 529                 if (req_task->out_flags.b.error_feature)
 530                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 531                 if (req_task->out_flags.b.nsector)
 532                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 533                 if (req_task->out_flags.b.sector)
 534                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 535                 if (req_task->out_flags.b.lcyl)
 536                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 537                 if (req_task->out_flags.b.hcyl)
 538                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 539         } else {
 540                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 541                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 542                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 543         }
 544
 545         if (req_task->in_flags.b.data)
 546                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 547
 548         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 549                 /* fixup data phase if needed */
 550                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 551                     req_task->data_phase == TASKFILE_IN_DMA)
 552                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 553         }
 554
 555         cmd.protocol = ATA_PROT_DMA;
 556
 557         switch (req_task->data_phase) {
 558                 case TASKFILE_MULTI_OUT:
 559                         if (!drive->mult_count) {
 560                                 /* (hs): give up if multcount is not set */
 561                                 printk(KERN_ERR "%s: %s Multimode Write " \
 562                                         "multcount is not set\n",
 563                                         drive->name, __func__);
 564                                 err = -EPERM;
 565                                 goto abort;
 566                         }
 567                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 568                         /* fall through */
 569                 case TASKFILE_OUT:
 570                         cmd.protocol = ATA_PROT_PIO;
 571                         /* fall through */
 572                 case TASKFILE_OUT_DMAQ:
 573                 case TASKFILE_OUT_DMA:
 574                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 575                         nsect = taskout / SECTOR_SIZE;
 576                         data_buf = outbuf;
 577                         break;
 578                 case TASKFILE_MULTI_IN:
 579                         if (!drive->mult_count) {
 580                                 /* (hs): give up if multcount is not set */
 581                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 582                                         "multcount is not set\n",
 583                                         drive->name, __func__);
 584                                 err = -EPERM;
 585                                 goto abort;
 586                         }
 587                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 588                         /* fall through */
 589                 case TASKFILE_IN:
 590                         cmd.protocol = ATA_PROT_PIO;
 591                         /* fall through */
 592                 case TASKFILE_IN_DMAQ:
 593                 case TASKFILE_IN_DMA:
 594                         nsect = taskin / SECTOR_SIZE;
 595                         data_buf = inbuf;
 596                         break;
 597                 case TASKFILE_NO_DATA:
 598                         cmd.protocol = ATA_PROT_NODATA;
 599                         break;
 600                 default:
 601                         err = -EFAULT;
 602                         goto abort;
 603         }
 604
 605         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 606                 nsect = 0;
 607         else if (!nsect) {
 608                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 609
 610                 if (!nsect) {
 611                         printk(KERN_ERR "%s: in/out command without data\n",
 612                                         drive->name);
 613                         err = -EFAULT;
 614                         goto abort;
 615                 }
 616         }
 617
 618         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 619
 620         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 621         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 622
 623         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 624             req_task->in_flags.all == 0) {
 625                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 626                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 627                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 628         }
 629
 630         if (copy_to_user(buf, req_task, tasksize)) {
 631                 err = -EFAULT;
 632                 goto abort;
 633         }
 634         if (taskout) {
 635                 int outtotal = tasksize;
 636                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 637                         err = -EFAULT;
 638                         goto abort;
 639                 }
 640         }
 641         if (taskin) {
 642                 int intotal = tasksize + taskout;
 643                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 644                         err = -EFAULT;
 645                         goto abort;
 646                 }
 647         }
 648 abort:
 649         kfree(req_task);
 650         kfree(outbuf);
 651         kfree(inbuf);
 652
 653 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 654
 655         return err;
 656 }
 657 #endif