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 (blk_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                 if (nr_bytes > PAGE_SIZE)
 243                         nr_bytes = PAGE_SIZE;
 244
 245                 page = sg_page(cursg);
 246                 offset = cursg->offset + cmd->cursg_ofs;
 247
 248                 /* get the current page and offset */
 249                 page = nth_page(page, (offset >> PAGE_SHIFT));
 250                 offset %= PAGE_SIZE;
 251
 252                 page_is_high = PageHighMem(page);
 253                 if (page_is_high)
 254                         local_irq_save(flags);
 255
 256                 buf = kmap_atomic(page) + offset;
 257
 258                 cmd->nleft -= nr_bytes;
 259                 cmd->cursg_ofs += nr_bytes;
 260
 261                 if (cmd->cursg_ofs == cursg->length) {
 262                         cursg = cmd->cursg = sg_next(cmd->cursg);
 263                         cmd->cursg_ofs = 0;
 264                 }
 265
 266                 /* do the actual data transfer */
 267                 if (write)
 268                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 269                 else
 270                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 271
 272                 kunmap_atomic(buf);
 273
 274                 if (page_is_high)
 275                         local_irq_restore(flags);
 276
 277                 len -= nr_bytes;
 278         }
 279 }
 280 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 281
 282 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 283                               unsigned int write)
 284 {
 285         unsigned int nr_bytes;
 286
 287         u8 saved_io_32bit = drive->io_32bit;
 288
 289         if (cmd->tf_flags & IDE_TFLAG_FS)
 290                 cmd->rq->errors = 0;
 291
 292         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 293                 drive->io_32bit = 0;
 294
 295         touch_softlockup_watchdog();
 296
 297         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 298                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 299         else
 300                 nr_bytes = SECTOR_SIZE;
 301
 302         ide_pio_bytes(drive, cmd, write, nr_bytes);
 303
 304         drive->io_32bit = saved_io_32bit;
 305 }
 306
 307 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 308 {
 309         if (cmd->tf_flags & IDE_TFLAG_FS) {
 310                 int nr_bytes = cmd->nbytes - cmd->nleft;
 311
 312                 if (cmd->protocol == ATA_PROT_PIO &&
 313                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 314                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 315                                 nr_bytes -= drive->mult_count << 9;
 316                         else
 317                                 nr_bytes -= SECTOR_SIZE;
 318                 }
 319
 320                 if (nr_bytes > 0)
 321                         ide_complete_rq(drive, 0, nr_bytes);
 322         }
 323 }
 324
 325 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 326 {
 327         struct request *rq = drive->hwif->rq;
 328         u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
 329         u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
 330
 331         ide_complete_cmd(drive, cmd, stat, err);
 332         rq->errors = err;
 333
 334         if (err == 0 && set_xfer) {
 335                 ide_set_xfer_rate(drive, nsect);
 336                 ide_driveid_update(drive);
 337         }
 338
 339         ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
 340 }
 341
 342 /*
 343  * Handler for command with PIO data phase.
 344  */
 345 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 346 {
 347         ide_hwif_t *hwif = drive->hwif;
 348         struct ide_cmd *cmd = &drive->hwif->cmd;
 349         u8 stat = hwif->tp_ops->read_status(hwif);
 350         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 351
 352         if (write == 0) {
 353                 /* Error? */
 354                 if (stat & ATA_ERR)
 355                         goto out_err;
 356
 357                 /* Didn't want any data? Odd. */
 358                 if ((stat & ATA_DRQ) == 0) {
 359                         /* Command all done? */
 360                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 361                                 goto out_end;
 362
 363                         /* Assume it was a spurious irq */
 364                         goto out_wait;
 365                 }
 366         } else {
 367                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 368                         goto out_err;
 369
 370                 /* Deal with unexpected ATA data phase. */
 371                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 372                         goto out_err;
 373         }
 374
 375         if (write && cmd->nleft == 0)
 376                 goto out_end;
 377
 378         /* Still data left to transfer. */
 379         ide_pio_datablock(drive, cmd, write);
 380
 381         /* Are we done? Check status and finish transfer. */
 382         if (write == 0 && cmd->nleft == 0) {
 383                 stat = wait_drive_not_busy(drive);
 384                 if (!OK_STAT(stat, 0, BAD_STAT))
 385                         goto out_err;
 386
 387                 goto out_end;
 388         }
 389 out_wait:
 390         /* Still data left to transfer. */
 391         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 392         return ide_started;
 393 out_end:
 394         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 395                 ide_finish_cmd(drive, cmd, stat);
 396         else
 397                 ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
 398         return ide_stopped;
 399 out_err:
 400         ide_error_cmd(drive, cmd);
 401         return ide_error(drive, __func__, stat);
 402 }
 403
 404 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 405                                          struct ide_cmd *cmd)
 406 {
 407         ide_startstop_t startstop;
 408
 409         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 410                           drive->bad_wstat, WAIT_DRQ)) {
 411                 pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
 412                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 413                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 414                 return startstop;
 415         }
 416
 417         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 418                 local_irq_disable();
 419
 420         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 421
 422         ide_pio_datablock(drive, cmd, 1);
 423
 424         return ide_started;
 425 }
 426
 427 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 428                      u16 nsect)
 429 {
 430         struct request *rq;
 431         int error;
 432         int rw = !(cmd->tf_flags & IDE_TFLAG_WRITE) ? READ : WRITE;
 433
 434         rq = blk_get_request(drive->queue, rw, __GFP_WAIT);
 435         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 436
 437         /*
 438          * (ks) We transfer currently only whole sectors.
 439          * This is suffient for now.  But, it would be great,
 440          * if we would find a solution to transfer any size.
 441          * To support special commands like READ LONG.
 442          */
 443         if (nsect) {
 444                 error = blk_rq_map_kern(drive->queue, rq, buf,
 445                                         nsect * SECTOR_SIZE, __GFP_WAIT);
 446                 if (error)
 447                         goto put_req;
 448         }
 449
 450         rq->special = cmd;
 451         cmd->rq = rq;
 452
 453         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 454
 455 put_req:
 456         blk_put_request(rq);
 457         return error;
 458 }
 459 EXPORT_SYMBOL(ide_raw_taskfile);
 460
 461 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 462 {
 463         cmd->protocol = ATA_PROT_NODATA;
 464
 465         return ide_raw_taskfile(drive, cmd, NULL, 0);
 466 }
 467 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 468
 469 #ifdef CONFIG_IDE_TASK_IOCTL
 470 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 471 {
 472         ide_task_request_t      *req_task;
 473         struct ide_cmd          cmd;
 474         u8 *outbuf              = NULL;
 475         u8 *inbuf               = NULL;
 476         u8 *data_buf            = NULL;
 477         int err                 = 0;
 478         int tasksize            = sizeof(struct ide_task_request_s);
 479         unsigned int taskin     = 0;
 480         unsigned int taskout    = 0;
 481         u16 nsect               = 0;
 482         char __user *buf = (char __user *)arg;
 483
 484         req_task = memdup_user(buf, tasksize);
 485         if (IS_ERR(req_task))
 486                 return PTR_ERR(req_task);
 487
 488         taskout = req_task->out_size;
 489         taskin  = req_task->in_size;
 490
 491         if (taskin > 65536 || taskout > 65536) {
 492                 err = -EINVAL;
 493                 goto abort;
 494         }
 495
 496         if (taskout) {
 497                 int outtotal = tasksize;
 498                 outbuf = kzalloc(taskout, GFP_KERNEL);
 499                 if (outbuf == NULL) {
 500                         err = -ENOMEM;
 501                         goto abort;
 502                 }
 503                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 504                         err = -EFAULT;
 505                         goto abort;
 506                 }
 507         }
 508
 509         if (taskin) {
 510                 int intotal = tasksize + taskout;
 511                 inbuf = kzalloc(taskin, GFP_KERNEL);
 512                 if (inbuf == NULL) {
 513                         err = -ENOMEM;
 514                         goto abort;
 515                 }
 516                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 517                         err = -EFAULT;
 518                         goto abort;
 519                 }
 520         }
 521
 522         memset(&cmd, 0, sizeof(cmd));
 523
 524         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 525         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 526
 527         cmd.valid.out.tf = IDE_VALID_DEVICE;
 528         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 529         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 530
 531         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 532                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 533                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 534         }
 535
 536         if (req_task->out_flags.all) {
 537                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 538
 539                 if (req_task->out_flags.b.data)
 540                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 541
 542                 if (req_task->out_flags.b.nsector_hob)
 543                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 544                 if (req_task->out_flags.b.sector_hob)
 545                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 546                 if (req_task->out_flags.b.lcyl_hob)
 547                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 548                 if (req_task->out_flags.b.hcyl_hob)
 549                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 550
 551                 if (req_task->out_flags.b.error_feature)
 552                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 553                 if (req_task->out_flags.b.nsector)
 554                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 555                 if (req_task->out_flags.b.sector)
 556                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 557                 if (req_task->out_flags.b.lcyl)
 558                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 559                 if (req_task->out_flags.b.hcyl)
 560                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 561         } else {
 562                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 563                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 564                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 565         }
 566
 567         if (req_task->in_flags.b.data)
 568                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 569
 570         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 571                 /* fixup data phase if needed */
 572                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 573                     req_task->data_phase == TASKFILE_IN_DMA)
 574                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 575         }
 576
 577         cmd.protocol = ATA_PROT_DMA;
 578
 579         switch (req_task->data_phase) {
 580         case TASKFILE_MULTI_OUT:
 581                 if (!drive->mult_count) {
 582                         /* (hs): give up if multcount is not set */
 583                         pr_err("%s: %s Multimode Write multcount is not set\n",
 584                                 drive->name, __func__);
 585                         err = -EPERM;
 586                         goto abort;
 587                 }
 588                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 589                 /* fall through */
 590         case TASKFILE_OUT:
 591                 cmd.protocol = ATA_PROT_PIO;
 592                 /* fall through */
 593         case TASKFILE_OUT_DMAQ:
 594         case TASKFILE_OUT_DMA:
 595                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 596                 nsect = taskout / SECTOR_SIZE;
 597                 data_buf = outbuf;
 598                 break;
 599         case TASKFILE_MULTI_IN:
 600                 if (!drive->mult_count) {
 601                         /* (hs): give up if multcount is not set */
 602                         pr_err("%s: %s Multimode Read multcount is not set\n",
 603                                 drive->name, __func__);
 604                         err = -EPERM;
 605                         goto abort;
 606                 }
 607                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 608                 /* fall through */
 609         case TASKFILE_IN:
 610                 cmd.protocol = ATA_PROT_PIO;
 611                 /* fall through */
 612         case TASKFILE_IN_DMAQ:
 613         case TASKFILE_IN_DMA:
 614                 nsect = taskin / SECTOR_SIZE;
 615                 data_buf = inbuf;
 616                 break;
 617         case TASKFILE_NO_DATA:
 618                 cmd.protocol = ATA_PROT_NODATA;
 619                 break;
 620         default:
 621                 err = -EFAULT;
 622                 goto abort;
 623         }
 624
 625         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 626                 nsect = 0;
 627         else if (!nsect) {
 628                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 629
 630                 if (!nsect) {
 631                         pr_err("%s: in/out command without data\n",
 632                                         drive->name);
 633                         err = -EFAULT;
 634                         goto abort;
 635                 }
 636         }
 637
 638         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 639
 640         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 641         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 642
 643         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 644             req_task->in_flags.all == 0) {
 645                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 646                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 647                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 648         }
 649
 650         if (copy_to_user(buf, req_task, tasksize)) {
 651                 err = -EFAULT;
 652                 goto abort;
 653         }
 654         if (taskout) {
 655                 int outtotal = tasksize;
 656                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 657                         err = -EFAULT;
 658                         goto abort;
 659                 }
 660         }
 661         if (taskin) {
 662                 int intotal = tasksize + taskout;
 663                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 664                         err = -EFAULT;
 665                         goto abort;
 666                 }
 667         }
 668 abort:
 669         kfree(req_task);
 670         kfree(outbuf);
 671         kfree(inbuf);
 672
 673         return err;
 674 }
 675 #endif