drivers/ide/ide-taskfile.c

   1 /*
   2  *  Copyright (C) 2000-2002        Michael Cornwell <cornwell@acm.org>
   3  *  Copyright (C) 2000-2002        Andre Hedrick <andre@linux-ide.org>
   4  *  Copyright (C) 2001-2002        Klaus Smolin
   5  *                                      IBM Storage Technology Division
   6  *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
   7  *
   8  *  The big the bad and the ugly.
   9  */
  10
  11 #include <linux/types.h>
  12 #include <linux/string.h>
  13 #include <linux/kernel.h>
  14 #include <linux/sched.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/errno.h>
  17 #include <linux/slab.h>
  18 #include <linux/delay.h>
  19 #include <linux/hdreg.h>
  20 #include <linux/ide.h>
  21 #include <linux/scatterlist.h>
  22
  23 #include <asm/uaccess.h>
  24 #include <asm/io.h>
  25
  26 void ide_tf_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                 printk(KERN_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                 SELECT_MASK(drive, 0);
 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.b.recalibrate = 1;
 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 transfered, 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                 printk(KERN_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         struct page *page;
 230         unsigned long flags;
 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
 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                 if (PageHighMem(page))
 252                         local_irq_save(flags);
 253
 254                 buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 255
 256                 cmd->nleft -= nr_bytes;
 257                 cmd->cursg_ofs += nr_bytes;
 258
 259                 if (cmd->cursg_ofs == cursg->length) {
 260                         cursg = cmd->cursg = sg_next(cmd->cursg);
 261                         cmd->cursg_ofs = 0;
 262                 }
 263
 264                 /* do the actual data transfer */
 265                 if (write)
 266                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 267                 else
 268                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 269
 270                 kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 271
 272                 if (PageHighMem(page))
 273                         local_irq_restore(flags);
 274
 275                 len -= nr_bytes;
 276         }
 277 }
 278 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 279
 280 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 281                               unsigned int write)
 282 {
 283         unsigned int nr_bytes;
 284
 285         u8 saved_io_32bit = drive->io_32bit;
 286
 287         if (cmd->tf_flags & IDE_TFLAG_FS)
 288                 cmd->rq->errors = 0;
 289
 290         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 291                 drive->io_32bit = 0;
 292
 293         touch_softlockup_watchdog();
 294
 295         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 296                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 297         else
 298                 nr_bytes = SECTOR_SIZE;
 299
 300         ide_pio_bytes(drive, cmd, write, nr_bytes);
 301
 302         drive->io_32bit = saved_io_32bit;
 303 }
 304
 305 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 306 {
 307         if (cmd->tf_flags & IDE_TFLAG_FS) {
 308                 int nr_bytes = cmd->nbytes - cmd->nleft;
 309
 310                 if (cmd->protocol == ATA_PROT_PIO &&
 311                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 312                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 313                                 nr_bytes -= drive->mult_count << 9;
 314                         else
 315                                 nr_bytes -= SECTOR_SIZE;
 316                 }
 317
 318                 if (nr_bytes > 0)
 319                         ide_complete_rq(drive, 0, nr_bytes);
 320         }
 321 }
 322
 323 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 324 {
 325         struct request *rq = drive->hwif->rq;
 326         u8 err = ide_read_error(drive);
 327
 328         ide_complete_cmd(drive, cmd, stat, err);
 329         rq->errors = err;
 330         ide_complete_rq(drive, err ? -EIO : 0, 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, 0, cmd->rq->nr_sectors << 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                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 403                         drive->name,
 404                         (cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
 405                         (drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
 406                 return startstop;
 407         }
 408
 409         if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
 410                 local_irq_disable();
 411
 412         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 413
 414         ide_pio_datablock(drive, cmd, 1);
 415
 416         return ide_started;
 417 }
 418
 419 int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
 420                      u16 nsect)
 421 {
 422         struct request *rq;
 423         int error;
 424
 425         rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
 426         rq->cmd_type = REQ_TYPE_ATA_TASKFILE;
 427         rq->buffer = buf;
 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         rq->hard_nr_sectors = rq->nr_sectors = nsect;
 436         rq->hard_cur_sectors = rq->current_nr_sectors = nsect;
 437
 438         if (cmd->tf_flags & IDE_TFLAG_WRITE)
 439                 rq->cmd_flags |= REQ_RW;
 440
 441         rq->special = cmd;
 442         cmd->rq = rq;
 443
 444         error = blk_execute_rq(drive->queue, NULL, rq, 0);
 445         blk_put_request(rq);
 446
 447         return error;
 448 }
 449
 450 EXPORT_SYMBOL(ide_raw_taskfile);
 451
 452 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 453 {
 454         cmd->protocol = ATA_PROT_NODATA;
 455
 456         return ide_raw_taskfile(drive, cmd, NULL, 0);
 457 }
 458 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 459
 460 #ifdef CONFIG_IDE_TASK_IOCTL
 461 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 462 {
 463         ide_task_request_t      *req_task;
 464         struct ide_cmd          cmd;
 465         u8 *outbuf              = NULL;
 466         u8 *inbuf               = NULL;
 467         u8 *data_buf            = NULL;
 468         int err                 = 0;
 469         int tasksize            = sizeof(struct ide_task_request_s);
 470         unsigned int taskin     = 0;
 471         unsigned int taskout    = 0;
 472         u16 nsect               = 0;
 473         char __user *buf = (char __user *)arg;
 474
 475 //      printk("IDE Taskfile ...\n");
 476
 477         req_task = kzalloc(tasksize, GFP_KERNEL);
 478         if (req_task == NULL) return -ENOMEM;
 479         if (copy_from_user(req_task, buf, tasksize)) {
 480                 kfree(req_task);
 481                 return -EFAULT;
 482         }
 483
 484         taskout = req_task->out_size;
 485         taskin  = req_task->in_size;
 486
 487         if (taskin > 65536 || taskout > 65536) {
 488                 err = -EINVAL;
 489                 goto abort;
 490         }
 491
 492         if (taskout) {
 493                 int outtotal = tasksize;
 494                 outbuf = kzalloc(taskout, GFP_KERNEL);
 495                 if (outbuf == NULL) {
 496                         err = -ENOMEM;
 497                         goto abort;
 498                 }
 499                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 500                         err = -EFAULT;
 501                         goto abort;
 502                 }
 503         }
 504
 505         if (taskin) {
 506                 int intotal = tasksize + taskout;
 507                 inbuf = kzalloc(taskin, GFP_KERNEL);
 508                 if (inbuf == NULL) {
 509                         err = -ENOMEM;
 510                         goto abort;
 511                 }
 512                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 513                         err = -EFAULT;
 514                         goto abort;
 515                 }
 516         }
 517
 518         memset(&cmd, 0, sizeof(cmd));
 519
 520         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 521         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 522
 523         cmd.valid.out.tf = IDE_VALID_DEVICE;
 524         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 525         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 526
 527         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 528                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 529                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 530         }
 531
 532         if (req_task->out_flags.all) {
 533                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 534
 535                 if (req_task->out_flags.b.data)
 536                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 537
 538                 if (req_task->out_flags.b.nsector_hob)
 539                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 540                 if (req_task->out_flags.b.sector_hob)
 541                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 542                 if (req_task->out_flags.b.lcyl_hob)
 543                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 544                 if (req_task->out_flags.b.hcyl_hob)
 545                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 546
 547                 if (req_task->out_flags.b.error_feature)
 548                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 549                 if (req_task->out_flags.b.nsector)
 550                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 551                 if (req_task->out_flags.b.sector)
 552                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 553                 if (req_task->out_flags.b.lcyl)
 554                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 555                 if (req_task->out_flags.b.hcyl)
 556                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 557         } else {
 558                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 559                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 560                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 561         }
 562
 563         if (req_task->in_flags.b.data)
 564                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 565
 566         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 567                 /* fixup data phase if needed */
 568                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 569                     req_task->data_phase == TASKFILE_IN_DMA)
 570                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 571         }
 572
 573         cmd.protocol = ATA_PROT_DMA;
 574
 575         switch (req_task->data_phase) {
 576                 case TASKFILE_MULTI_OUT:
 577                         if (!drive->mult_count) {
 578                                 /* (hs): give up if multcount is not set */
 579                                 printk(KERN_ERR "%s: %s Multimode Write " \
 580                                         "multcount is not set\n",
 581                                         drive->name, __func__);
 582                                 err = -EPERM;
 583                                 goto abort;
 584                         }
 585                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 586                         /* fall through */
 587                 case TASKFILE_OUT:
 588                         cmd.protocol = ATA_PROT_PIO;
 589                         /* fall through */
 590                 case TASKFILE_OUT_DMAQ:
 591                 case TASKFILE_OUT_DMA:
 592                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 593                         nsect = taskout / SECTOR_SIZE;
 594                         data_buf = outbuf;
 595                         break;
 596                 case TASKFILE_MULTI_IN:
 597                         if (!drive->mult_count) {
 598                                 /* (hs): give up if multcount is not set */
 599                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 600                                         "multcount is not set\n",
 601                                         drive->name, __func__);
 602                                 err = -EPERM;
 603                                 goto abort;
 604                         }
 605                         cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 606                         /* fall through */
 607                 case TASKFILE_IN:
 608                         cmd.protocol = ATA_PROT_PIO;
 609                         /* fall through */
 610                 case TASKFILE_IN_DMAQ:
 611                 case TASKFILE_IN_DMA:
 612                         nsect = taskin / SECTOR_SIZE;
 613                         data_buf = inbuf;
 614                         break;
 615                 case TASKFILE_NO_DATA:
 616                         cmd.protocol = ATA_PROT_NODATA;
 617                         break;
 618                 default:
 619                         err = -EFAULT;
 620                         goto abort;
 621         }
 622
 623         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 624                 nsect = 0;
 625         else if (!nsect) {
 626                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 627
 628                 if (!nsect) {
 629                         printk(KERN_ERR "%s: in/out command without data\n",
 630                                         drive->name);
 631                         err = -EFAULT;
 632                         goto abort;
 633                 }
 634         }
 635
 636         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 637
 638         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 639         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 640
 641         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 642             req_task->in_flags.all == 0) {
 643                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 644                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 645                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 646         }
 647
 648         if (copy_to_user(buf, req_task, tasksize)) {
 649                 err = -EFAULT;
 650                 goto abort;
 651         }
 652         if (taskout) {
 653                 int outtotal = tasksize;
 654                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 655                         err = -EFAULT;
 656                         goto abort;
 657                 }
 658         }
 659         if (taskin) {
 660                 int intotal = tasksize + taskout;
 661                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 662                         err = -EFAULT;
 663                         goto abort;
 664                 }
 665         }
 666 abort:
 667         kfree(req_task);
 668         kfree(outbuf);
 669         kfree(inbuf);
 670
 671 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 672
 673         return err;
 674 }
 675 #endif