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/scatterlist.h>
  23 #include <linux/uaccess.h>
  24
  25 #include <asm/io.h>
  26
  27 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  28 {
  29         ide_hwif_t *hwif = drive->hwif;
  30         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  31
  32         /* Be sure we're looking at the low order bytes */
  33         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  34
  35         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  36
  37         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  38                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  39
  40                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  41         }
  42 }
  43
  44 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
  45 {
  46 #ifdef DEBUG
  47         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  48                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  49                s, cmd->tf.feature, cmd->tf.nsect,
  50                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  51                cmd->tf.device, cmd->tf.command);
  52         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  53                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  54 #endif
  55 }
  56
  57 int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
  58 {
  59         struct ide_cmd cmd;
  60
  61         memset(&cmd, 0, sizeof(cmd));
  62         cmd.tf.nsect = 0x01;
  63         if (drive->media == ide_disk)
  64                 cmd.tf.command = ATA_CMD_ID_ATA;
  65         else
  66                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  67         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  68         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  69         cmd.protocol = ATA_PROT_PIO;
  70
  71         return ide_raw_taskfile(drive, &cmd, buf, 1);
  72 }
  73
  74 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  75 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  76 static ide_startstop_t task_pio_intr(ide_drive_t *);
  77
  78 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  79 {
  80         ide_hwif_t *hwif = drive->hwif;
  81         struct ide_cmd *cmd = &hwif->cmd;
  82         struct ide_taskfile *tf = &cmd->tf;
  83         ide_handler_t *handler = NULL;
  84         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  85         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  86
  87         if (orig_cmd->protocol == ATA_PROT_PIO &&
  88             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  89             drive->mult_count == 0) {
  90                 pr_err("%s: multimode not set!\n", drive->name);
  91                 return ide_stopped;
  92         }
  93
  94         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  95                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  96
  97         memcpy(cmd, orig_cmd, sizeof(*cmd));
  98
  99         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
 100                 ide_tf_dump(drive->name, cmd);
 101                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 102
 103                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
 104                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
 105
 106                         tp_ops->output_data(drive, cmd, data, 2);
 107                 }
 108
 109                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
 110                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
 111                                   0xE0 : 0xEF;
 112
 113                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
 114                                 cmd->tf.device &= HIHI;
 115                         cmd->tf.device |= drive->select;
 116                 }
 117
 118                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 119                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 120         }
 121
 122         switch (cmd->protocol) {
 123         case ATA_PROT_PIO:
 124                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 125                         tp_ops->exec_command(hwif, tf->command);
 126                         ndelay(400);    /* FIXME */
 127                         return pre_task_out_intr(drive, cmd);
 128                 }
 129                 handler = task_pio_intr;
 130                 /* fall-through */
 131         case ATA_PROT_NODATA:
 132                 if (handler == NULL)
 133                         handler = task_no_data_intr;
 134                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 135                 return ide_started;
 136         case ATA_PROT_DMA:
 137                 if (ide_dma_prepare(drive, cmd))
 138                         return ide_stopped;
 139                 hwif->expiry = dma_ops->dma_timer_expiry;
 140                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 141                 dma_ops->dma_start(drive);
 142         default:
 143                 return ide_started;
 144         }
 145 }
 146 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 147
 148 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 149 {
 150         ide_hwif_t *hwif = drive->hwif;
 151         struct ide_cmd *cmd = &hwif->cmd;
 152         struct ide_taskfile *tf = &cmd->tf;
 153         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 154         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 155         u8 stat;
 156
 157         local_irq_enable_in_hardirq();
 158
 159         while (1) {
 160                 stat = hwif->tp_ops->read_status(hwif);
 161                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 162                         break;
 163                 udelay(10);
 164         };
 165
 166         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 167                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 168                         drive->mult_req = drive->mult_count = 0;
 169                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
 170                         (void)ide_dump_status(drive, __func__, stat);
 171                         return ide_stopped;
 172                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 173                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 174                                 ide_set_handler(drive, &task_no_data_intr,
 175                                                 WAIT_WORSTCASE);
 176                                 return ide_started;
 177                         }
 178                 }
 179                 return ide_error(drive, "task_no_data_intr", stat);
 180         }
 181
 182         if (custom && tf->command == ATA_CMD_SET_MULTI)
 183                 drive->mult_count = drive->mult_req;
 184
 185         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 186             tf->command == ATA_CMD_CHK_POWER) {
 187                 struct request *rq = hwif->rq;
 188
 189                 if (ata_pm_request(rq))
 190                         ide_complete_pm_rq(drive, rq);
 191                 else
 192                         ide_finish_cmd(drive, cmd, stat);
 193         }
 194
 195         return ide_stopped;
 196 }
 197
 198 static u8 wait_drive_not_busy(ide_drive_t *drive)
 199 {
 200         ide_hwif_t *hwif = drive->hwif;
 201         int retries;
 202         u8 stat;
 203
 204         /*
 205          * Last sector was transferred, wait until device is ready.  This can
 206          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 207          */
 208         for (retries = 0; retries < 1000; retries++) {
 209                 stat = hwif->tp_ops->read_status(hwif);
 210
 211                 if (stat & ATA_BUSY)
 212                         udelay(10);
 213                 else
 214                         break;
 215         }
 216
 217         if (stat & ATA_BUSY)
 218                 pr_err("%s: drive still BUSY!\n", drive->name);
 219
 220         return stat;
 221 }
 222
 223 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 224                    unsigned int write, unsigned int len)
 225 {
 226         ide_hwif_t *hwif = drive->hwif;
 227         struct scatterlist *sg = hwif->sg_table;
 228         struct scatterlist *cursg = cmd->cursg;
 229         unsigned long uninitialized_var(flags);
 230         struct page *page;
 231         unsigned int offset;
 232         u8 *buf;
 233
 234         cursg = cmd->cursg;
 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                 int page_is_high;
 241
 242                 page = sg_page(cursg);
 243                 offset = cursg->offset + cmd->cursg_ofs;
 244
 245                 /* get the current page and offset */
 246                 page = nth_page(page, (offset >> PAGE_SHIFT));
 247                 offset %= PAGE_SIZE;
 248
 249                 nr_bytes = min_t(unsigned, nr_bytes, (PAGE_SIZE - offset));
 250
 251                 page_is_high = PageHighMem(page);
 252                 if (page_is_high)
 253                         local_irq_save(flags);
 254
 255                 buf = kmap_atomic(page) + 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);
 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         int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
 432
 433         rq = blk_get_request(drive->queue, rw, __GFP_RECLAIM);
 434         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 435
 436         /*
 437          * (ks) We transfer currently only whole sectors.
 438          * This is suffient for now.  But, it would be great,
 439          * if we would find a solution to transfer any size.
 440          * To support special commands like READ LONG.
 441          */
 442         if (nsect) {
 443                 error = blk_rq_map_kern(drive->queue, rq, buf,
 444                                         nsect * SECTOR_SIZE, __GFP_RECLAIM);
 445                 if (error)
 446                         goto put_req;
 447         }
 448
 449         rq->special = cmd;
 450         cmd->rq = rq;
 451
 452         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 453
 454 put_req:
 455         blk_put_request(rq);
 456         return error;
 457 }
 458 EXPORT_SYMBOL(ide_raw_taskfile);
 459
 460 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 461 {
 462         cmd->protocol = ATA_PROT_NODATA;
 463
 464         return ide_raw_taskfile(drive, cmd, NULL, 0);
 465 }
 466 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 467
 468 #ifdef CONFIG_IDE_TASK_IOCTL
 469 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 470 {
 471         ide_task_request_t      *req_task;
 472         struct ide_cmd          cmd;
 473         u8 *outbuf              = NULL;
 474         u8 *inbuf               = NULL;
 475         u8 *data_buf            = NULL;
 476         int err                 = 0;
 477         int tasksize            = sizeof(struct ide_task_request_s);
 478         unsigned int taskin     = 0;
 479         unsigned int taskout    = 0;
 480         u16 nsect               = 0;
 481         char __user *buf = (char __user *)arg;
 482
 483         req_task = memdup_user(buf, tasksize);
 484         if (IS_ERR(req_task))
 485                 return PTR_ERR(req_task);
 486
 487         taskout = req_task->out_size;
 488         taskin  = req_task->in_size;
 489
 490         if (taskin > 65536 || taskout > 65536) {
 491                 err = -EINVAL;
 492                 goto abort;
 493         }
 494
 495         if (taskout) {
 496                 int outtotal = tasksize;
 497                 outbuf = kzalloc(taskout, GFP_KERNEL);
 498                 if (outbuf == NULL) {
 499                         err = -ENOMEM;
 500                         goto abort;
 501                 }
 502                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 503                         err = -EFAULT;
 504                         goto abort;
 505                 }
 506         }
 507
 508         if (taskin) {
 509                 int intotal = tasksize + taskout;
 510                 inbuf = kzalloc(taskin, GFP_KERNEL);
 511                 if (inbuf == NULL) {
 512                         err = -ENOMEM;
 513                         goto abort;
 514                 }
 515                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 516                         err = -EFAULT;
 517                         goto abort;
 518                 }
 519         }
 520
 521         memset(&cmd, 0, sizeof(cmd));
 522
 523         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 524         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 525
 526         cmd.valid.out.tf = IDE_VALID_DEVICE;
 527         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 528         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 529
 530         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 531                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 532                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 533         }
 534
 535         if (req_task->out_flags.all) {
 536                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 537
 538                 if (req_task->out_flags.b.data)
 539                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 540
 541                 if (req_task->out_flags.b.nsector_hob)
 542                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 543                 if (req_task->out_flags.b.sector_hob)
 544                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 545                 if (req_task->out_flags.b.lcyl_hob)
 546                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 547                 if (req_task->out_flags.b.hcyl_hob)
 548                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 549
 550                 if (req_task->out_flags.b.error_feature)
 551                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 552                 if (req_task->out_flags.b.nsector)
 553                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 554                 if (req_task->out_flags.b.sector)
 555                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 556                 if (req_task->out_flags.b.lcyl)
 557                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 558                 if (req_task->out_flags.b.hcyl)
 559                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 560         } else {
 561                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 562                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 563                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 564         }
 565
 566         if (req_task->in_flags.b.data)
 567                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 568
 569         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 570                 /* fixup data phase if needed */
 571                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 572                     req_task->data_phase == TASKFILE_IN_DMA)
 573                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 574         }
 575
 576         cmd.protocol = ATA_PROT_DMA;
 577
 578         switch (req_task->data_phase) {
 579         case TASKFILE_MULTI_OUT:
 580                 if (!drive->mult_count) {
 581                         /* (hs): give up if multcount is not set */
 582                         pr_err("%s: %s Multimode Write 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_OUT:
 590                 cmd.protocol = ATA_PROT_PIO;
 591                 /* fall through */
 592         case TASKFILE_OUT_DMAQ:
 593         case TASKFILE_OUT_DMA:
 594                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 595                 nsect = taskout / SECTOR_SIZE;
 596                 data_buf = outbuf;
 597                 break;
 598         case TASKFILE_MULTI_IN:
 599                 if (!drive->mult_count) {
 600                         /* (hs): give up if multcount is not set */
 601                         pr_err("%s: %s Multimode Read multcount is not set\n",
 602                                 drive->name, __func__);
 603                         err = -EPERM;
 604                         goto abort;
 605                 }
 606                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 607                 /* fall through */
 608         case TASKFILE_IN:
 609                 cmd.protocol = ATA_PROT_PIO;
 610                 /* fall through */
 611         case TASKFILE_IN_DMAQ:
 612         case TASKFILE_IN_DMA:
 613                 nsect = taskin / SECTOR_SIZE;
 614                 data_buf = inbuf;
 615                 break;
 616         case TASKFILE_NO_DATA:
 617                 cmd.protocol = ATA_PROT_NODATA;
 618                 break;
 619         default:
 620                 err = -EFAULT;
 621                 goto abort;
 622         }
 623
 624         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 625                 nsect = 0;
 626         else if (!nsect) {
 627                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 628
 629                 if (!nsect) {
 630                         pr_err("%s: in/out command without data\n",
 631                                         drive->name);
 632                         err = -EFAULT;
 633                         goto abort;
 634                 }
 635         }
 636
 637         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 638
 639         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 640         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 641
 642         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 643             req_task->in_flags.all == 0) {
 644                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 645                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 646                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 647         }
 648
 649         if (copy_to_user(buf, req_task, tasksize)) {
 650                 err = -EFAULT;
 651                 goto abort;
 652         }
 653         if (taskout) {
 654                 int outtotal = tasksize;
 655                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 656                         err = -EFAULT;
 657                         goto abort;
 658                 }
 659         }
 660         if (taskin) {
 661                 int intotal = tasksize + taskout;
 662                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 663                         err = -EFAULT;
 664                         goto abort;
 665                 }
 666         }
 667 abort:
 668         kfree(req_task);
 669         kfree(outbuf);
 670         kfree(inbuf);
 671
 672         return err;
 673 }
 674 #endif