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 #include <linux/uaccess.h>
  23
  24 #include <asm/io.h>
  25
  26 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  27 {
  28         ide_hwif_t *hwif = drive->hwif;
  29         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  30
  31         /* Be sure we're looking at the low order bytes */
  32         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  33
  34         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  35
  36         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  37                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  38
  39                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  40         }
  41 }
  42
  43 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
  44 {
  45 #ifdef DEBUG
  46         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  47                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  48                s, cmd->tf.feature, cmd->tf.nsect,
  49                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  50                cmd->tf.device, cmd->tf.command);
  51         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  52                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  53 #endif
  54 }
  55
  56 int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
  57 {
  58         struct ide_cmd cmd;
  59
  60         memset(&cmd, 0, sizeof(cmd));
  61         cmd.tf.nsect = 0x01;
  62         if (drive->media == ide_disk)
  63                 cmd.tf.command = ATA_CMD_ID_ATA;
  64         else
  65                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  66         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  67         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  68         cmd.protocol = ATA_PROT_PIO;
  69
  70         return ide_raw_taskfile(drive, &cmd, buf, 1);
  71 }
  72
  73 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  74 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  75 static ide_startstop_t task_pio_intr(ide_drive_t *);
  76
  77 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  78 {
  79         ide_hwif_t *hwif = drive->hwif;
  80         struct ide_cmd *cmd = &hwif->cmd;
  81         struct ide_taskfile *tf = &cmd->tf;
  82         ide_handler_t *handler = NULL;
  83         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  84         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  85
  86         if (orig_cmd->protocol == ATA_PROT_PIO &&
  87             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  88             drive->mult_count == 0) {
  89                 pr_err("%s: multimode not set!\n", drive->name);
  90                 return ide_stopped;
  91         }
  92
  93         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  94                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  95
  96         memcpy(cmd, orig_cmd, sizeof(*cmd));
  97
  98         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
  99                 ide_tf_dump(drive->name, cmd);
 100                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 101
 102                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
 103                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
 104
 105                         tp_ops->output_data(drive, cmd, data, 2);
 106                 }
 107
 108                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
 109                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
 110                                   0xE0 : 0xEF;
 111
 112                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
 113                                 cmd->tf.device &= HIHI;
 114                         cmd->tf.device |= drive->select;
 115                 }
 116
 117                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 118                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 119         }
 120
 121         switch (cmd->protocol) {
 122         case ATA_PROT_PIO:
 123                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 124                         tp_ops->exec_command(hwif, tf->command);
 125                         ndelay(400);    /* FIXME */
 126                         return pre_task_out_intr(drive, cmd);
 127                 }
 128                 handler = task_pio_intr;
 129                 /* fall-through */
 130         case ATA_PROT_NODATA:
 131                 if (handler == NULL)
 132                         handler = task_no_data_intr;
 133                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 134                 return ide_started;
 135         case ATA_PROT_DMA:
 136                 if (ide_dma_prepare(drive, cmd))
 137                         return ide_stopped;
 138                 hwif->expiry = dma_ops->dma_timer_expiry;
 139                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 140                 dma_ops->dma_start(drive);
 141         default:
 142                 return ide_started;
 143         }
 144 }
 145 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 146
 147 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 148 {
 149         ide_hwif_t *hwif = drive->hwif;
 150         struct ide_cmd *cmd = &hwif->cmd;
 151         struct ide_taskfile *tf = &cmd->tf;
 152         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 153         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 154         u8 stat;
 155
 156         local_irq_enable_in_hardirq();
 157
 158         while (1) {
 159                 stat = hwif->tp_ops->read_status(hwif);
 160                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 161                         break;
 162                 udelay(10);
 163         };
 164
 165         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 166                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 167                         drive->mult_req = drive->mult_count = 0;
 168                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
 169                         (void)ide_dump_status(drive, __func__, stat);
 170                         return ide_stopped;
 171                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 172                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 173                                 ide_set_handler(drive, &task_no_data_intr,
 174                                                 WAIT_WORSTCASE);
 175                                 return ide_started;
 176                         }
 177                 }
 178                 return ide_error(drive, "task_no_data_intr", stat);
 179         }
 180
 181         if (custom && tf->command == ATA_CMD_SET_MULTI)
 182                 drive->mult_count = drive->mult_req;
 183
 184         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 185             tf->command == ATA_CMD_CHK_POWER) {
 186                 struct request *rq = hwif->rq;
 187
 188                 if (blk_pm_request(rq))
 189                         ide_complete_pm_rq(drive, rq);
 190                 else
 191                         ide_finish_cmd(drive, cmd, stat);
 192         }
 193
 194         return ide_stopped;
 195 }
 196
 197 static u8 wait_drive_not_busy(ide_drive_t *drive)
 198 {
 199         ide_hwif_t *hwif = drive->hwif;
 200         int retries;
 201         u8 stat;
 202
 203         /*
 204          * Last sector was transfered, wait until device is ready.  This can
 205          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 206          */
 207         for (retries = 0; retries < 1000; retries++) {
 208                 stat = hwif->tp_ops->read_status(hwif);
 209
 210                 if (stat & ATA_BUSY)
 211                         udelay(10);
 212                 else
 213                         break;
 214         }
 215
 216         if (stat & ATA_BUSY)
 217                 pr_err("%s: drive still BUSY!\n", drive->name);
 218
 219         return stat;
 220 }
 221
 222 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 223                    unsigned int write, unsigned int len)
 224 {
 225         ide_hwif_t *hwif = drive->hwif;
 226         struct scatterlist *sg = hwif->sg_table;
 227         struct scatterlist *cursg = cmd->cursg;
 228         unsigned long uninitialized_var(flags);
 229         struct page *page;
 230         unsigned int offset;
 231         u8 *buf;
 232
 233         cursg = cmd->cursg;
 234         if (cursg == NULL)
 235                 cursg = cmd->cursg = sg;
 236
 237         while (len) {
 238                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 239                 int page_is_high;
 240
 241                 if (nr_bytes > PAGE_SIZE)
 242                         nr_bytes = PAGE_SIZE;
 243
 244                 page = sg_page(cursg);
 245                 offset = cursg->offset + cmd->cursg_ofs;
 246
 247                 /* get the current page and offset */
 248                 page = nth_page(page, (offset >> PAGE_SHIFT));
 249                 offset %= PAGE_SIZE;
 250
 251                 page_is_high = PageHighMem(page);
 252                 if (page_is_high)
 253                         local_irq_save(flags);
 254
 255                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 256
 257                 cmd->nleft -= nr_bytes;
 258                 cmd->cursg_ofs += nr_bytes;
 259
 260                 if (cmd->cursg_ofs == cursg->length) {
 261                         cursg = cmd->cursg = sg_next(cmd->cursg);
 262                         cmd->cursg_ofs = 0;
 263                 }
 264
 265                 /* do the actual data transfer */
 266                 if (write)
 267                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 268                 else
 269                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 270
 271                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 272
 273                 if (page_is_high)
 274                         local_irq_restore(flags);
 275
 276                 len -= nr_bytes;
 277         }
 278 }
 279 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 280
 281 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 282                               unsigned int write)
 283 {
 284         unsigned int nr_bytes;
 285
 286         u8 saved_io_32bit = drive->io_32bit;
 287
 288         if (cmd->tf_flags & IDE_TFLAG_FS)
 289                 cmd->rq->errors = 0;
 290
 291         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 292                 drive->io_32bit = 0;
 293
 294         touch_softlockup_watchdog();
 295
 296         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 297                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 298         else
 299                 nr_bytes = SECTOR_SIZE;
 300
 301         ide_pio_bytes(drive, cmd, write, nr_bytes);
 302
 303         drive->io_32bit = saved_io_32bit;
 304 }
 305
 306 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 307 {
 308         if (cmd->tf_flags & IDE_TFLAG_FS) {
 309                 int nr_bytes = cmd->nbytes - cmd->nleft;
 310
 311                 if (cmd->protocol == ATA_PROT_PIO &&
 312                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 313                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 314                                 nr_bytes -= drive->mult_count << 9;
 315                         else
 316                                 nr_bytes -= SECTOR_SIZE;
 317                 }
 318
 319                 if (nr_bytes > 0)
 320                         ide_complete_rq(drive, 0, nr_bytes);
 321         }
 322 }
 323
 324 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 325 {
 326         struct request *rq = drive->hwif->rq;
 327         u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
 328         u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
 329
 330         ide_complete_cmd(drive, cmd, stat, err);
 331         rq->errors = err;
 332
 333         if (err == 0 && set_xfer) {
 334                 ide_set_xfer_rate(drive, nsect);
 335                 ide_driveid_update(drive);
 336         }
 337
 338         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 339 }
 340
 341 /*
 342  * Handler for command with PIO data phase.
 343  */
 344 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 345 {
 346         ide_hwif_t *hwif = drive->hwif;
 347         struct ide_cmd *cmd = &drive->hwif->cmd;
 348         u8 stat = hwif->tp_ops->read_status(hwif);
 349         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 350
 351         if (write == 0) {
 352                 /* Error? */
 353                 if (stat & ATA_ERR)
 354                         goto out_err;
 355
 356                 /* Didn't want any data? Odd. */
 357                 if ((stat & ATA_DRQ) == 0) {
 358                         /* Command all done? */
 359                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 360                                 goto out_end;
 361
 362                         /* Assume it was a spurious irq */
 363                         goto out_wait;
 364                 }
 365         } else {
 366                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 367                         goto out_err;
 368
 369                 /* Deal with unexpected ATA data phase. */
 370                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 371                         goto out_err;
 372         }
 373
 374         if (write && cmd->nleft == 0)
 375                 goto out_end;
 376
 377         /* Still data left to transfer. */
 378         ide_pio_datablock(drive, cmd, write);
 379
 380         /* Are we done? Check status and finish transfer. */
 381         if (write == 0 && cmd->nleft == 0) {
 382                 stat = wait_drive_not_busy(drive);
 383                 if (!OK_STAT(stat, 0, BAD_STAT))
 384                         goto out_err;
 385
 386                 goto out_end;
 387         }
 388 out_wait:
 389         /* Still data left to transfer. */
 390         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 391         return ide_started;
 392 out_end:
 393         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 394                 ide_finish_cmd(drive, cmd, stat);
 395         else
 396                 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
 397         return ide_stopped;
 398 out_err:
 399         ide_error_cmd(drive, cmd);
 400         return ide_error(drive, __func__, stat);
 401 }
 402
 403 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 404                                          struct ide_cmd *cmd)
 405 {
 406         ide_startstop_t startstop;
 407
 408         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 409                           drive->bad_wstat, WAIT_DRQ)) {
 410                 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
 411                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 412                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 413                 return startstop;
 414         }
 415
 416         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 417                 local_irq_disable();
 418
 419         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 420
 421         ide_pio_datablock(drive, cmd, 1);
 422
 423         return ide_started;
 424 }
 425
 426 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 427                      u16 nsect)
 428 {
 429         struct request *rq;
 430         int error;
 431
 432         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 433         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 434
 435         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 436                 rq->cmd_flags |= REQ_RW;
 437
 438         /*
 439          * (ks) We transfer currently only whole sectors.
 440          * This is suffient for now.  But, it would be great,
 441          * if we would find a solution to transfer any size.
 442          * To support special commands like READ LONG.
 443          */
 444         if (nsect) {
 445                 error = blk_rq_map_kern(drive->queue, rq, buf,
 446                                         nsect * SECTOR_SIZE, __GFP_WAIT);
 447                 if (error)
 448                         goto put_req;
 449         }
 450
 451         rq->special = cmd;
 452         cmd->rq = rq;
 453
 454         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 455
 456 put_req:
 457         blk_put_request(rq);
 458         return error;
 459 }
 460 EXPORT_SYMBOL(ide_raw_taskfile);
 461
 462 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 463 {
 464         cmd->protocol = ATA_PROT_NODATA;
 465
 466         return ide_raw_taskfile(drive, cmd, NULL, 0);
 467 }
 468 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 469
 470 #ifdef CONFIG_IDE_TASK_IOCTL
 471 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 472 {
 473         ide_task_request_t      *req_task;
 474         struct ide_cmd          cmd;
 475         u8 *outbuf              = NULL;
 476         u8 *inbuf               = NULL;
 477         u8 *data_buf            = NULL;
 478         int err                 = 0;
 479         int tasksize            = sizeof(struct ide_task_request_s);
 480         unsigned int taskin     = 0;
 481         unsigned int taskout    = 0;
 482         u16 nsect               = 0;
 483         char __user *buf = (char __user *)arg;
 484
 485         req_task = kzalloc(tasksize, GFP_KERNEL);
 486         if (req_task == NULL)
 487                 return -ENOMEM;
 488         if (copy_from_user(req_task, buf, tasksize)) {
 489                 kfree(req_task);
 490                 return -EFAULT;
 491         }
 492
 493         taskout = req_task->out_size;
 494         taskin  = req_task->in_size;
 495
 496         if (taskin > 65536 || taskout > 65536) {
 497                 err = -EINVAL;
 498                 goto abort;
 499         }
 500
 501         if (taskout) {
 502                 int outtotal = tasksize;
 503                 outbuf = kzalloc(taskout, GFP_KERNEL);
 504                 if (outbuf == NULL) {
 505                         err = -ENOMEM;
 506                         goto abort;
 507                 }
 508                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 509                         err = -EFAULT;
 510                         goto abort;
 511                 }
 512         }
 513
 514         if (taskin) {
 515                 int intotal = tasksize + taskout;
 516                 inbuf = kzalloc(taskin, GFP_KERNEL);
 517                 if (inbuf == NULL) {
 518                         err = -ENOMEM;
 519                         goto abort;
 520                 }
 521                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 522                         err = -EFAULT;
 523                         goto abort;
 524                 }
 525         }
 526
 527         memset(&cmd, 0, sizeof(cmd));
 528
 529         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 530         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 531
 532         cmd.valid.out.tf = IDE_VALID_DEVICE;
 533         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 534         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 535
 536         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 537                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 538                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 539         }
 540
 541         if (req_task->out_flags.all) {
 542                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 543
 544                 if (req_task->out_flags.b.data)
 545                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 546
 547                 if (req_task->out_flags.b.nsector_hob)
 548                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 549                 if (req_task->out_flags.b.sector_hob)
 550                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 551                 if (req_task->out_flags.b.lcyl_hob)
 552                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 553                 if (req_task->out_flags.b.hcyl_hob)
 554                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 555
 556                 if (req_task->out_flags.b.error_feature)
 557                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 558                 if (req_task->out_flags.b.nsector)
 559                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 560                 if (req_task->out_flags.b.sector)
 561                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 562                 if (req_task->out_flags.b.lcyl)
 563                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 564                 if (req_task->out_flags.b.hcyl)
 565                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 566         } else {
 567                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 568                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 569                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 570         }
 571
 572         if (req_task->in_flags.b.data)
 573                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 574
 575         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 576                 /* fixup data phase if needed */
 577                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 578                     req_task->data_phase == TASKFILE_IN_DMA)
 579                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 580         }
 581
 582         cmd.protocol = ATA_PROT_DMA;
 583
 584         switch (req_task->data_phase) {
 585         case TASKFILE_MULTI_OUT:
 586                 if (!drive->mult_count) {
 587                         /* (hs): give up if multcount is not set */
 588                         pr_err("%s: %s Multimode Write multcount is not set\n",
 589                                 drive->name, __func__);
 590                         err = -EPERM;
 591                         goto abort;
 592                 }
 593                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 594                 /* fall through */
 595         case TASKFILE_OUT:
 596                 cmd.protocol = ATA_PROT_PIO;
 597                 /* fall through */
 598         case TASKFILE_OUT_DMAQ:
 599         case TASKFILE_OUT_DMA:
 600                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 601                 nsect = taskout / SECTOR_SIZE;
 602                 data_buf = outbuf;
 603                 break;
 604         case TASKFILE_MULTI_IN:
 605                 if (!drive->mult_count) {
 606                         /* (hs): give up if multcount is not set */
 607                         pr_err("%s: %s Multimode Read multcount is not set\n",
 608                                 drive->name, __func__);
 609                         err = -EPERM;
 610                         goto abort;
 611                 }
 612                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 613                 /* fall through */
 614         case TASKFILE_IN:
 615                 cmd.protocol = ATA_PROT_PIO;
 616                 /* fall through */
 617         case TASKFILE_IN_DMAQ:
 618         case TASKFILE_IN_DMA:
 619                 nsect = taskin / SECTOR_SIZE;
 620                 data_buf = inbuf;
 621                 break;
 622         case TASKFILE_NO_DATA:
 623                 cmd.protocol = ATA_PROT_NODATA;
 624                 break;
 625         default:
 626                 err = -EFAULT;
 627                 goto abort;
 628         }
 629
 630         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 631                 nsect = 0;
 632         else if (!nsect) {
 633                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 634
 635                 if (!nsect) {
 636                         pr_err("%s: in/out command without data\n",
 637                                         drive->name);
 638                         err = -EFAULT;
 639                         goto abort;
 640                 }
 641         }
 642
 643         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 644
 645         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 646         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 647
 648         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 649             req_task->in_flags.all == 0) {
 650                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 651                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 652                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 653         }
 654
 655         if (copy_to_user(buf, req_task, tasksize)) {
 656                 err = -EFAULT;
 657                 goto abort;
 658         }
 659         if (taskout) {
 660                 int outtotal = tasksize;
 661                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 662                         err = -EFAULT;
 663                         goto abort;
 664                 }
 665         }
 666         if (taskin) {
 667                 int intotal = tasksize + taskout;
 668                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 669                         err = -EFAULT;
 670                         goto abort;
 671                 }
 672         }
 673 abort:
 674         kfree(req_task);
 675         kfree(outbuf);
 676         kfree(inbuf);
 677
 678         return err;
 679 }
 680 #endif