git.rot13.org Git - 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/export.h>
  15 #include <linux/sched.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/errno.h>
  18 #include <linux/slab.h>
  19 #include <linux/delay.h>
  20 #include <linux/hdreg.h>
  21 #include <linux/ide.h>
  22 #include <linux/nmi.h>
  23 #include <linux/scatterlist.h>
  24 #include <linux/uaccess.h>
  25
  26 #include <asm/io.h>
  27
  28 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  29 {
  30         ide_hwif_t *hwif = drive->hwif;
  31         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  32
  33         /* Be sure we're looking at the low order bytes */
  34         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  35
  36         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  37
  38         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  39                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  40
  41                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  42         }
  43 }
  44
  45 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
  46 {
  47 #ifdef DEBUG
  48         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  49                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  50                s, cmd->tf.feature, cmd->tf.nsect,
  51                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  52                cmd->tf.device, cmd->tf.command);
  53         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  54                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  55 #endif
  56 }
  57
  58 int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
  59 {
  60         struct ide_cmd cmd;
  61
  62         memset(&cmd, 0, sizeof(cmd));
  63         cmd.tf.nsect = 0x01;
  64         if (drive->media == ide_disk)
  65                 cmd.tf.command = ATA_CMD_ID_ATA;
  66         else
  67                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  68         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  69         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  70         cmd.protocol = ATA_PROT_PIO;
  71
  72         return ide_raw_taskfile(drive, &cmd, buf, 1);
  73 }
  74
  75 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  76 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  77 static ide_startstop_t task_pio_intr(ide_drive_t *);
  78
  79 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  80 {
  81         ide_hwif_t *hwif = drive->hwif;
  82         struct ide_cmd *cmd = &hwif->cmd;
  83         struct ide_taskfile *tf = &cmd->tf;
  84         ide_handler_t *handler = NULL;
  85         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  86         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  87
  88         if (orig_cmd->protocol == ATA_PROT_PIO &&
  89             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  90             drive->mult_count == 0) {
  91                 pr_err("%s: multimode not set!\n", drive->name);
  92                 return ide_stopped;
  93         }
  94
  95         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  96                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  97
  98         memcpy(cmd, orig_cmd, sizeof(*cmd));
  99
 100         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
 101                 ide_tf_dump(drive->name, cmd);
 102                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 103
 104                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
 105                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
 106
 107                         tp_ops->output_data(drive, cmd, data, 2);
 108                 }
 109
 110                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
 111                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
 112                                   0xE0 : 0xEF;
 113
 114                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
 115                                 cmd->tf.device &= HIHI;
 116                         cmd->tf.device |= drive->select;
 117                 }
 118
 119                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 120                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 121         }
 122
 123         switch (cmd->protocol) {
 124         case ATA_PROT_PIO:
 125                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 126                         tp_ops->exec_command(hwif, tf->command);
 127                         ndelay(400);    /* FIXME */
 128                         return pre_task_out_intr(drive, cmd);
 129                 }
 130                 handler = task_pio_intr;
 131                 /* fall-through */
 132         case ATA_PROT_NODATA:
 133                 if (handler == NULL)
 134                         handler = task_no_data_intr;
 135                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 136                 return ide_started;
 137         case ATA_PROT_DMA:
 138                 if (ide_dma_prepare(drive, cmd))
 139                         return ide_stopped;
 140                 hwif->expiry = dma_ops->dma_timer_expiry;
 141                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 142                 dma_ops->dma_start(drive);
 143         default:
 144                 return ide_started;
 145         }
 146 }
 147 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 148
 149 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 150 {
 151         ide_hwif_t *hwif = drive->hwif;
 152         struct ide_cmd *cmd = &hwif->cmd;
 153         struct ide_taskfile *tf = &cmd->tf;
 154         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 155         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 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                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 169                         drive->mult_req = drive->mult_count = 0;
 170                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
 171                         (void)ide_dump_status(drive, __func__, stat);
 172                         return ide_stopped;
 173                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 174                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 175                                 ide_set_handler(drive, &task_no_data_intr,
 176                                                 WAIT_WORSTCASE);
 177                                 return ide_started;
 178                         }
 179                 }
 180                 return ide_error(drive, "task_no_data_intr", stat);
 181         }
 182
 183         if (custom && tf->command == ATA_CMD_SET_MULTI)
 184                 drive->mult_count = drive->mult_req;
 185
 186         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 187             tf->command == ATA_CMD_CHK_POWER) {
 188                 struct request *rq = hwif->rq;
 189
 190                 if (ata_pm_request(rq))
 191                         ide_complete_pm_rq(drive, rq);
 192                 else
 193                         ide_finish_cmd(drive, cmd, stat);
 194         }
 195
 196         return ide_stopped;
 197 }
 198
 199 static u8 wait_drive_not_busy(ide_drive_t *drive)
 200 {
 201         ide_hwif_t *hwif = drive->hwif;
 202         int retries;
 203         u8 stat;
 204
 205         /*
 206          * Last sector was transferred, wait until device is ready.  This can
 207          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 208          */
 209         for (retries = 0; retries < 1000; retries++) {
 210                 stat = hwif->tp_ops->read_status(hwif);
 211
 212                 if (stat & ATA_BUSY)
 213                         udelay(10);
 214                 else
 215                         break;
 216         }
 217
 218         if (stat & ATA_BUSY)
 219                 pr_err("%s: drive still BUSY!\n", drive->name);
 220
 221         return stat;
 222 }
 223
 224 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 225                    unsigned int write, unsigned int len)
 226 {
 227         ide_hwif_t *hwif = drive->hwif;
 228         struct scatterlist *sg = hwif->sg_table;
 229         struct scatterlist *cursg = cmd->cursg;
 230         unsigned long uninitialized_var(flags);
 231         struct page *page;
 232         unsigned int offset;
 233         u8 *buf;
 234
 235         if (cursg == NULL)
 236                 cursg = cmd->cursg = sg;
 237
 238         while (len) {
 239                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 240
 241                 page = sg_page(cursg);
 242                 offset = cursg->offset + cmd->cursg_ofs;
 243
 244                 /* get the current page and offset */
 245                 page = nth_page(page, (offset >> PAGE_SHIFT));
 246                 offset %= PAGE_SIZE;
 247
 248                 nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
 249
 250                 buf = kmap_atomic(page) + offset;
 251
 252                 cmd->nleft -= nr_bytes;
 253                 cmd->cursg_ofs += nr_bytes;
 254
 255                 if (cmd->cursg_ofs == cursg->length) {
 256                         cursg = cmd->cursg = sg_next(cmd->cursg);
 257                         cmd->cursg_ofs = 0;
 258                 }
 259
 260                 /* do the actual data transfer */
 261                 if (write)
 262                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 263                 else
 264                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 265
 266                 kunmap_atomic(buf);
 267
 268                 len -= nr_bytes;
 269         }
 270 }
 271 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 272
 273 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 274                               unsigned int write)
 275 {
 276         unsigned int nr_bytes;
 277
 278         u8 saved_io_32bit = drive->io_32bit;
 279
 280         if (cmd->tf_flags & IDE_TFLAG_FS)
 281                 scsi_req(cmd->rq)->result = 0;
 282
 283         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 284                 drive->io_32bit = 0;
 285
 286         touch_softlockup_watchdog();
 287
 288         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 289                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 290         else
 291                 nr_bytes = SECTOR_SIZE;
 292
 293         ide_pio_bytes(drive, cmd, write, nr_bytes);
 294
 295         drive->io_32bit = saved_io_32bit;
 296 }
 297
 298 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 299 {
 300         if (cmd->tf_flags & IDE_TFLAG_FS) {
 301                 int nr_bytes = cmd->nbytes - cmd->nleft;
 302
 303                 if (cmd->protocol == ATA_PROT_PIO &&
 304                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 305                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 306                                 nr_bytes -= drive->mult_count << 9;
 307                         else
 308                                 nr_bytes -= SECTOR_SIZE;
 309                 }
 310
 311                 if (nr_bytes > 0)
 312                         ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 313         }
 314 }
 315
 316 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 317 {
 318         struct request *rq = drive->hwif->rq;
 319         u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
 320         u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
 321
 322         ide_complete_cmd(drive, cmd, stat, err);
 323         scsi_req(rq)->result = err;
 324
 325         if (err == 0 && set_xfer) {
 326                 ide_set_xfer_rate(drive, nsect);
 327                 ide_driveid_update(drive);
 328         }
 329
 330         ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
 331 }
 332
 333 /*
 334  * Handler for command with PIO data phase.
 335  */
 336 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 337 {
 338         ide_hwif_t *hwif = drive->hwif;
 339         struct ide_cmd *cmd = &drive->hwif->cmd;
 340         u8 stat = hwif->tp_ops->read_status(hwif);
 341         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 342
 343         if (write == 0) {
 344                 /* Error? */
 345                 if (stat & ATA_ERR)
 346                         goto out_err;
 347
 348                 /* Didn't want any data? Odd. */
 349                 if ((stat & ATA_DRQ) == 0) {
 350                         /* Command all done? */
 351                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 352                                 goto out_end;
 353
 354                         /* Assume it was a spurious irq */
 355                         goto out_wait;
 356                 }
 357         } else {
 358                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 359                         goto out_err;
 360
 361                 /* Deal with unexpected ATA data phase. */
 362                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 363                         goto out_err;
 364         }
 365
 366         if (write && cmd->nleft == 0)
 367                 goto out_end;
 368
 369         /* Still data left to transfer. */
 370         ide_pio_datablock(drive, cmd, write);
 371
 372         /* Are we done? Check status and finish transfer. */
 373         if (write == 0 && cmd->nleft == 0) {
 374                 stat = wait_drive_not_busy(drive);
 375                 if (!OK_STAT(stat, 0, BAD_STAT))
 376                         goto out_err;
 377
 378                 goto out_end;
 379         }
 380 out_wait:
 381         /* Still data left to transfer. */
 382         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 383         return ide_started;
 384 out_end:
 385         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 386                 ide_finish_cmd(drive, cmd, stat);
 387         else
 388                 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
 389         return ide_stopped;
 390 out_err:
 391         ide_error_cmd(drive, cmd);
 392         return ide_error(drive, __func__, stat);
 393 }
 394
 395 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 396                                          struct ide_cmd *cmd)
 397 {
 398         ide_startstop_t startstop;
 399
 400         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 401                           drive->bad_wstat, WAIT_DRQ)) {
 402                 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
 403                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 404                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 405                 return startstop;
 406         }
 407
 408         if (!force_irqthreads && (drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 409                 local_irq_disable();
 410
 411         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 412
 413         ide_pio_datablock(drive, cmd, 1);
 414
 415         return ide_started;
 416 }
 417
 418 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 419                      u16 nsect)
 420 {
 421         struct request *rq;
 422         int error;
 423
 424         rq = blk_get_request(drive->queue,
 425                 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
 426                         REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 427         ide_req(rq)->type = ATA_PRIV_TASKFILE;
 428
 429         /*
 430          * (ks) We transfer currently only whole sectors.
 431          * This is suffient for now.  But, it would be great,
 432          * if we would find a solution to transfer any size.
 433          * To support special commands like READ LONG.
 434          */
 435         if (nsect) {
 436                 error = blk_rq_map_kern(drive->queue, rq, buf,
 437                                         nsect * SECTOR_SIZE, GFP_NOIO);
 438                 if (error)
 439                         goto put_req;
 440         }
 441
 442         rq->special = cmd;
 443         cmd->rq = rq;
 444
 445         blk_execute_rq(drive->queue, NULL, rq, 0);
 446         error = scsi_req(rq)->result ? -EIO : 0;
 447 put_req:
 448         blk_put_request(rq);
 449         return error;
 450 }
 451 EXPORT_SYMBOL(ide_raw_taskfile);
 452
 453 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 454 {
 455         cmd->protocol = ATA_PROT_NODATA;
 456
 457         return ide_raw_taskfile(drive, cmd, NULL, 0);
 458 }
 459 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 460
 461 #ifdef CONFIG_IDE_TASK_IOCTL
 462 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 463 {
 464         ide_task_request_t      *req_task;
 465         struct ide_cmd          cmd;
 466         u8 *outbuf              = NULL;
 467         u8 *inbuf               = NULL;
 468         u8 *data_buf            = NULL;
 469         int err                 = 0;
 470         int tasksize            = sizeof(struct ide_task_request_s);
 471         unsigned int taskin     = 0;
 472         unsigned int taskout    = 0;
 473         u16 nsect               = 0;
 474         char __user *buf = (char __user *)arg;
 475
 476         req_task = memdup_user(buf, tasksize);
 477         if (IS_ERR(req_task))
 478                 return PTR_ERR(req_task);
 479
 480         taskout = req_task->out_size;
 481         taskin  = req_task->in_size;
 482
 483         if (taskin > 65536 || taskout > 65536) {
 484                 err = -EINVAL;
 485                 goto abort;
 486         }
 487
 488         if (taskout) {
 489                 int outtotal = tasksize;
 490                 outbuf = kzalloc(taskout, GFP_KERNEL);
 491                 if (outbuf == NULL) {
 492                         err = -ENOMEM;
 493                         goto abort;
 494                 }
 495                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 496                         err = -EFAULT;
 497                         goto abort;
 498                 }
 499         }
 500
 501         if (taskin) {
 502                 int intotal = tasksize + taskout;
 503                 inbuf = kzalloc(taskin, GFP_KERNEL);
 504                 if (inbuf == NULL) {
 505                         err = -ENOMEM;
 506                         goto abort;
 507                 }
 508                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 509                         err = -EFAULT;
 510                         goto abort;
 511                 }
 512         }
 513
 514         memset(&cmd, 0, sizeof(cmd));
 515
 516         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 517         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 518
 519         cmd.valid.out.tf = IDE_VALID_DEVICE;
 520         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 521         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 522
 523         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 524                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 525                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 526         }
 527
 528         if (req_task->out_flags.all) {
 529                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 530
 531                 if (req_task->out_flags.b.data)
 532                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 533
 534                 if (req_task->out_flags.b.nsector_hob)
 535                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 536                 if (req_task->out_flags.b.sector_hob)
 537                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 538                 if (req_task->out_flags.b.lcyl_hob)
 539                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 540                 if (req_task->out_flags.b.hcyl_hob)
 541                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 542
 543                 if (req_task->out_flags.b.error_feature)
 544                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 545                 if (req_task->out_flags.b.nsector)
 546                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 547                 if (req_task->out_flags.b.sector)
 548                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 549                 if (req_task->out_flags.b.lcyl)
 550                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 551                 if (req_task->out_flags.b.hcyl)
 552                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 553         } else {
 554                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 555                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 556                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 557         }
 558
 559         if (req_task->in_flags.b.data)
 560                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 561
 562         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 563                 /* fixup data phase if needed */
 564                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 565                     req_task->data_phase == TASKFILE_IN_DMA)
 566                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 567         }
 568
 569         cmd.protocol = ATA_PROT_DMA;
 570
 571         switch (req_task->data_phase) {
 572         case TASKFILE_MULTI_OUT:
 573                 if (!drive->mult_count) {
 574                         /* (hs): give up if multcount is not set */
 575                         pr_err("%s: %s Multimode Write multcount is not set\n",
 576                                 drive->name, __func__);
 577                         err = -EPERM;
 578                         goto abort;
 579                 }
 580                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 581                 /* fall through */
 582         case TASKFILE_OUT:
 583                 cmd.protocol = ATA_PROT_PIO;
 584                 /* fall through */
 585         case TASKFILE_OUT_DMAQ:
 586         case TASKFILE_OUT_DMA:
 587                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 588                 nsect = taskout / SECTOR_SIZE;
 589                 data_buf = outbuf;
 590                 break;
 591         case TASKFILE_MULTI_IN:
 592                 if (!drive->mult_count) {
 593                         /* (hs): give up if multcount is not set */
 594                         pr_err("%s: %s Multimode Read multcount is not set\n",
 595                                 drive->name, __func__);
 596                         err = -EPERM;
 597                         goto abort;
 598                 }
 599                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 600                 /* fall through */
 601         case TASKFILE_IN:
 602                 cmd.protocol = ATA_PROT_PIO;
 603                 /* fall through */
 604         case TASKFILE_IN_DMAQ:
 605         case TASKFILE_IN_DMA:
 606                 nsect = taskin / SECTOR_SIZE;
 607                 data_buf = inbuf;
 608                 break;
 609         case TASKFILE_NO_DATA:
 610                 cmd.protocol = ATA_PROT_NODATA;
 611                 break;
 612         default:
 613                 err = -EFAULT;
 614                 goto abort;
 615         }
 616
 617         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 618                 nsect = 0;
 619         else if (!nsect) {
 620                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 621
 622                 if (!nsect) {
 623                         pr_err("%s: in/out command without data\n",
 624                                         drive->name);
 625                         err = -EFAULT;
 626                         goto abort;
 627                 }
 628         }
 629
 630         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 631
 632         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 633         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 634
 635         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 636             req_task->in_flags.all == 0) {
 637                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 638                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 639                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 640         }
 641
 642         if (copy_to_user(buf, req_task, tasksize)) {
 643                 err = -EFAULT;
 644                 goto abort;
 645         }
 646         if (taskout) {
 647                 int outtotal = tasksize;
 648                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 649                         err = -EFAULT;
 650                         goto abort;
 651                 }
 652         }
 653         if (taskin) {
 654                 int intotal = tasksize + taskout;
 655                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 656                         err = -EFAULT;
 657                         goto abort;
 658                 }
 659         }
 660 abort:
 661         kfree(req_task);
 662         kfree(outbuf);
 663         kfree(inbuf);
 664
 665         return err;
 666 }
 667 #endif