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/module.h>
  12 #include <linux/types.h>
  13 #include <linux/string.h>
  14 #include <linux/kernel.h>
  15 #include <linux/timer.h>
  16 #include <linux/mm.h>
  17 #include <linux/sched.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/major.h>
  20 #include <linux/errno.h>
  21 #include <linux/genhd.h>
  22 #include <linux/blkpg.h>
  23 #include <linux/slab.h>
  24 #include <linux/pci.h>
  25 #include <linux/delay.h>
  26 #include <linux/hdreg.h>
  27 #include <linux/ide.h>
  28 #include <linux/bitops.h>
  29 #include <linux/scatterlist.h>
  30
  31 #include <asm/byteorder.h>
  32 #include <asm/irq.h>
  33 #include <asm/uaccess.h>
  34 #include <asm/io.h>
  35
  36 void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
  37 {
  38         ide_hwif_t *hwif = drive->hwif;
  39         struct ide_taskfile *tf = &task->tf;
  40         u8 HIHI = (task->tf_flags & IDE_TFLAG_LBA48) ? 0xE0 : 0xEF;
  41
  42         if (task->tf_flags & IDE_TFLAG_FLAGGED)
  43                 HIHI = 0xFF;
  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                 drive->name, tf->feature, tf->nsect, tf->lbal,
  49                 tf->lbam, tf->lbah, tf->device, tf->command);
  50         printk("%s: hob: nsect 0x%02x lbal 0x%02x "
  51                 "lbam 0x%02x lbah 0x%02x\n",
  52                 drive->name, tf->hob_nsect, tf->hob_lbal,
  53                 tf->hob_lbam, tf->hob_lbah);
  54 #endif
  55
  56         ide_set_irq(drive, 1);
  57
  58         if ((task->tf_flags & IDE_TFLAG_NO_SELECT_MASK) == 0)
  59                 SELECT_MASK(drive, 0);
  60
  61         if (task->tf_flags & IDE_TFLAG_OUT_DATA)
  62                 hwif->OUTW((tf->hob_data << 8) | tf->data, IDE_DATA_REG);
  63
  64         if (task->tf_flags & IDE_TFLAG_OUT_HOB_FEATURE)
  65                 hwif->OUTB(tf->hob_feature, IDE_FEATURE_REG);
  66         if (task->tf_flags & IDE_TFLAG_OUT_HOB_NSECT)
  67                 hwif->OUTB(tf->hob_nsect, IDE_NSECTOR_REG);
  68         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAL)
  69                 hwif->OUTB(tf->hob_lbal, IDE_SECTOR_REG);
  70         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAM)
  71                 hwif->OUTB(tf->hob_lbam, IDE_LCYL_REG);
  72         if (task->tf_flags & IDE_TFLAG_OUT_HOB_LBAH)
  73                 hwif->OUTB(tf->hob_lbah, IDE_HCYL_REG);
  74
  75         if (task->tf_flags & IDE_TFLAG_OUT_FEATURE)
  76                 hwif->OUTB(tf->feature, IDE_FEATURE_REG);
  77         if (task->tf_flags & IDE_TFLAG_OUT_NSECT)
  78                 hwif->OUTB(tf->nsect, IDE_NSECTOR_REG);
  79         if (task->tf_flags & IDE_TFLAG_OUT_LBAL)
  80                 hwif->OUTB(tf->lbal, IDE_SECTOR_REG);
  81         if (task->tf_flags & IDE_TFLAG_OUT_LBAM)
  82                 hwif->OUTB(tf->lbam, IDE_LCYL_REG);
  83         if (task->tf_flags & IDE_TFLAG_OUT_LBAH)
  84                 hwif->OUTB(tf->lbah, IDE_HCYL_REG);
  85
  86         if (task->tf_flags & IDE_TFLAG_OUT_DEVICE)
  87                 hwif->OUTB((tf->device & HIHI) | drive->select.all, IDE_SELECT_REG);
  88 }
  89
  90 int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
  91 {
  92         ide_task_t args;
  93
  94         memset(&args, 0, sizeof(ide_task_t));
  95         args.tf.nsect = 0x01;
  96         if (drive->media == ide_disk)
  97                 args.tf.command = WIN_IDENTIFY;
  98         else
  99                 args.tf.command = WIN_PIDENTIFY;
 100         args.tf_flags   = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 101         args.data_phase = TASKFILE_IN;
 102         return ide_raw_taskfile(drive, &args, buf, 1);
 103 }
 104
 105 static int inline task_dma_ok(ide_task_t *task)
 106 {
 107         if (blk_fs_request(task->rq) || (task->tf_flags & IDE_TFLAG_FLAGGED))
 108                 return 1;
 109
 110         switch (task->tf.command) {
 111                 case WIN_WRITEDMA_ONCE:
 112                 case WIN_WRITEDMA:
 113                 case WIN_WRITEDMA_EXT:
 114                 case WIN_READDMA_ONCE:
 115                 case WIN_READDMA:
 116                 case WIN_READDMA_EXT:
 117                 case WIN_IDENTIFY_DMA:
 118                         return 1;
 119         }
 120
 121         return 0;
 122 }
 123
 124 static ide_startstop_t task_no_data_intr(ide_drive_t *);
 125 static ide_startstop_t set_geometry_intr(ide_drive_t *);
 126 static ide_startstop_t recal_intr(ide_drive_t *);
 127 static ide_startstop_t set_multmode_intr(ide_drive_t *);
 128 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct request *);
 129 static ide_startstop_t task_in_intr(ide_drive_t *);
 130
 131 ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 132 {
 133         ide_hwif_t *hwif        = HWIF(drive);
 134         struct ide_taskfile *tf = &task->tf;
 135         ide_handler_t *handler = NULL;
 136
 137         if (task->data_phase == TASKFILE_MULTI_IN ||
 138             task->data_phase == TASKFILE_MULTI_OUT) {
 139                 if (!drive->mult_count) {
 140                         printk(KERN_ERR "%s: multimode not set!\n",
 141                                         drive->name);
 142                         return ide_stopped;
 143                 }
 144         }
 145
 146         if (task->tf_flags & IDE_TFLAG_FLAGGED)
 147                 task->tf_flags |= IDE_TFLAG_FLAGGED_SET_IN_FLAGS;
 148
 149         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0)
 150                 ide_tf_load(drive, task);
 151
 152         switch (task->data_phase) {
 153         case TASKFILE_MULTI_OUT:
 154         case TASKFILE_OUT:
 155                 hwif->OUTBSYNC(drive, tf->command, IDE_COMMAND_REG);
 156                 ndelay(400);    /* FIXME */
 157                 return pre_task_out_intr(drive, task->rq);
 158         case TASKFILE_MULTI_IN:
 159         case TASKFILE_IN:
 160                 handler = task_in_intr;
 161                 /* fall-through */
 162         case TASKFILE_NO_DATA:
 163                 if (handler == NULL)
 164                         handler = task_no_data_intr;
 165                 /* WIN_{SPECIFY,RESTORE,SETMULT} use custom handlers */
 166                 if (task->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) {
 167                         switch (tf->command) {
 168                         case WIN_SPECIFY: handler = set_geometry_intr;  break;
 169                         case WIN_RESTORE: handler = recal_intr;         break;
 170                         case WIN_SETMULT: handler = set_multmode_intr;  break;
 171                         }
 172                 }
 173                 ide_execute_command(drive, tf->command, handler,
 174                                     WAIT_WORSTCASE, NULL);
 175                 return ide_started;
 176         default:
 177                 if (task_dma_ok(task) == 0 || drive->using_dma == 0 ||
 178                     hwif->dma_setup(drive))
 179                         return ide_stopped;
 180                 hwif->dma_exec_cmd(drive, tf->command);
 181                 hwif->dma_start(drive);
 182                 return ide_started;
 183         }
 184 }
 185 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 186
 187 /*
 188  * set_multmode_intr() is invoked on completion of a WIN_SETMULT cmd.
 189  */
 190 static ide_startstop_t set_multmode_intr(ide_drive_t *drive)
 191 {
 192         ide_hwif_t *hwif = HWIF(drive);
 193         u8 stat;
 194
 195         if (OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 196                 drive->mult_count = drive->mult_req;
 197         } else {
 198                 drive->mult_req = drive->mult_count = 0;
 199                 drive->special.b.recalibrate = 1;
 200                 (void) ide_dump_status(drive, "set_multmode", stat);
 201         }
 202         return ide_stopped;
 203 }
 204
 205 /*
 206  * set_geometry_intr() is invoked on completion of a WIN_SPECIFY cmd.
 207  */
 208 static ide_startstop_t set_geometry_intr(ide_drive_t *drive)
 209 {
 210         ide_hwif_t *hwif = HWIF(drive);
 211         int retries = 5;
 212         u8 stat;
 213
 214         while (((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && retries--)
 215                 udelay(10);
 216
 217         if (OK_STAT(stat, READY_STAT, BAD_STAT))
 218                 return ide_stopped;
 219
 220         if (stat & (ERR_STAT|DRQ_STAT))
 221                 return ide_error(drive, "set_geometry_intr", stat);
 222
 223         BUG_ON(HWGROUP(drive)->handler != NULL);
 224         ide_set_handler(drive, &set_geometry_intr, WAIT_WORSTCASE, NULL);
 225         return ide_started;
 226 }
 227
 228 /*
 229  * recal_intr() is invoked on completion of a WIN_RESTORE (recalibrate) cmd.
 230  */
 231 static ide_startstop_t recal_intr(ide_drive_t *drive)
 232 {
 233         ide_hwif_t *hwif = HWIF(drive);
 234         u8 stat;
 235
 236         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG), READY_STAT, BAD_STAT))
 237                 return ide_error(drive, "recal_intr", stat);
 238         return ide_stopped;
 239 }
 240
 241 /*
 242  * Handler for commands without a data phase
 243  */
 244 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 245 {
 246         ide_task_t *args        = HWGROUP(drive)->rq->special;
 247         ide_hwif_t *hwif        = HWIF(drive);
 248         u8 stat;
 249
 250         local_irq_enable_in_hardirq();
 251         if (!OK_STAT(stat = hwif->INB(IDE_STATUS_REG),READY_STAT,BAD_STAT)) {
 252                 return ide_error(drive, "task_no_data_intr", stat);
 253                 /* calls ide_end_drive_cmd */
 254         }
 255         if (args)
 256                 ide_end_drive_cmd(drive, stat, hwif->INB(IDE_ERROR_REG));
 257
 258         return ide_stopped;
 259 }
 260
 261 static u8 wait_drive_not_busy(ide_drive_t *drive)
 262 {
 263         ide_hwif_t *hwif = HWIF(drive);
 264         int retries;
 265         u8 stat;
 266
 267         /*
 268          * Last sector was transfered, wait until drive is ready.
 269          * This can take up to 10 usec, but we will wait max 1 ms.
 270          */
 271         for (retries = 0; retries < 100; retries++) {
 272                 if ((stat = hwif->INB(IDE_STATUS_REG)) & BUSY_STAT)
 273                         udelay(10);
 274                 else
 275                         break;
 276         }
 277
 278         if (stat & BUSY_STAT)
 279                 printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
 280
 281         return stat;
 282 }
 283
 284 static void ide_pio_sector(ide_drive_t *drive, unsigned int write)
 285 {
 286         ide_hwif_t *hwif = drive->hwif;
 287         struct scatterlist *sg = hwif->sg_table;
 288         struct scatterlist *cursg = hwif->cursg;
 289         struct page *page;
 290 #ifdef CONFIG_HIGHMEM
 291         unsigned long flags;
 292 #endif
 293         unsigned int offset;
 294         u8 *buf;
 295
 296         cursg = hwif->cursg;
 297         if (!cursg) {
 298                 cursg = sg;
 299                 hwif->cursg = sg;
 300         }
 301
 302         page = sg_page(cursg);
 303         offset = cursg->offset + hwif->cursg_ofs * SECTOR_SIZE;
 304
 305         /* get the current page and offset */
 306         page = nth_page(page, (offset >> PAGE_SHIFT));
 307         offset %= PAGE_SIZE;
 308
 309 #ifdef CONFIG_HIGHMEM
 310         local_irq_save(flags);
 311 #endif
 312         buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;
 313
 314         hwif->nleft--;
 315         hwif->cursg_ofs++;
 316
 317         if ((hwif->cursg_ofs * SECTOR_SIZE) == cursg->length) {
 318                 hwif->cursg = sg_next(hwif->cursg);
 319                 hwif->cursg_ofs = 0;
 320         }
 321
 322         /* do the actual data transfer */
 323         if (write)
 324                 hwif->ata_output_data(drive, buf, SECTOR_WORDS);
 325         else
 326                 hwif->ata_input_data(drive, buf, SECTOR_WORDS);
 327
 328         kunmap_atomic(buf, KM_BIO_SRC_IRQ);
 329 #ifdef CONFIG_HIGHMEM
 330         local_irq_restore(flags);
 331 #endif
 332 }
 333
 334 static void ide_pio_multi(ide_drive_t *drive, unsigned int write)
 335 {
 336         unsigned int nsect;
 337
 338         nsect = min_t(unsigned int, drive->hwif->nleft, drive->mult_count);
 339         while (nsect--)
 340                 ide_pio_sector(drive, write);
 341 }
 342
 343 static void ide_pio_datablock(ide_drive_t *drive, struct request *rq,
 344                                      unsigned int write)
 345 {
 346         u8 saved_io_32bit = drive->io_32bit;
 347
 348         if (rq->bio)    /* fs request */
 349                 rq->errors = 0;
 350
 351         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 352                 ide_task_t *task = rq->special;
 353
 354                 if (task->tf_flags & IDE_TFLAG_IO_16BIT)
 355                         drive->io_32bit = 0;
 356         }
 357
 358         touch_softlockup_watchdog();
 359
 360         switch (drive->hwif->data_phase) {
 361         case TASKFILE_MULTI_IN:
 362         case TASKFILE_MULTI_OUT:
 363                 ide_pio_multi(drive, write);
 364                 break;
 365         default:
 366                 ide_pio_sector(drive, write);
 367                 break;
 368         }
 369
 370         drive->io_32bit = saved_io_32bit;
 371 }
 372
 373 static ide_startstop_t task_error(ide_drive_t *drive, struct request *rq,
 374                                   const char *s, u8 stat)
 375 {
 376         if (rq->bio) {
 377                 ide_hwif_t *hwif = drive->hwif;
 378                 int sectors = hwif->nsect - hwif->nleft;
 379
 380                 switch (hwif->data_phase) {
 381                 case TASKFILE_IN:
 382                         if (hwif->nleft)
 383                                 break;
 384                         /* fall through */
 385                 case TASKFILE_OUT:
 386                         sectors--;
 387                         break;
 388                 case TASKFILE_MULTI_IN:
 389                         if (hwif->nleft)
 390                                 break;
 391                         /* fall through */
 392                 case TASKFILE_MULTI_OUT:
 393                         sectors -= drive->mult_count;
 394                 default:
 395                         break;
 396                 }
 397
 398                 if (sectors > 0) {
 399                         ide_driver_t *drv;
 400
 401                         drv = *(ide_driver_t **)rq->rq_disk->private_data;
 402                         drv->end_request(drive, 1, sectors);
 403                 }
 404         }
 405         return ide_error(drive, s, stat);
 406 }
 407
 408 void task_end_request(ide_drive_t *drive, struct request *rq, u8 stat)
 409 {
 410         if (rq->cmd_type == REQ_TYPE_ATA_TASKFILE) {
 411                 u8 err = drive->hwif->INB(IDE_ERROR_REG);
 412
 413                 ide_end_drive_cmd(drive, stat, err);
 414                 return;
 415         }
 416
 417         if (rq->rq_disk) {
 418                 ide_driver_t *drv;
 419
 420                 drv = *(ide_driver_t **)rq->rq_disk->private_data;;
 421                 drv->end_request(drive, 1, rq->nr_sectors);
 422         } else
 423                 ide_end_request(drive, 1, rq->nr_sectors);
 424 }
 425
 426 /*
 427  * Handler for command with PIO data-in phase (Read/Read Multiple).
 428  */
 429 static ide_startstop_t task_in_intr(ide_drive_t *drive)
 430 {
 431         ide_hwif_t *hwif = drive->hwif;
 432         struct request *rq = HWGROUP(drive)->rq;
 433         u8 stat = hwif->INB(IDE_STATUS_REG);
 434
 435         /* new way for dealing with premature shared PCI interrupts */
 436         if (!OK_STAT(stat, DRQ_STAT, BAD_R_STAT)) {
 437                 if (stat & (ERR_STAT | DRQ_STAT))
 438                         return task_error(drive, rq, __FUNCTION__, stat);
 439                 /* No data yet, so wait for another IRQ. */
 440                 ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 441                 return ide_started;
 442         }
 443
 444         ide_pio_datablock(drive, rq, 0);
 445
 446         /* If it was the last datablock check status and finish transfer. */
 447         if (!hwif->nleft) {
 448                 stat = wait_drive_not_busy(drive);
 449                 if (!OK_STAT(stat, 0, BAD_STAT))
 450                         return task_error(drive, rq, __FUNCTION__, stat);
 451                 task_end_request(drive, rq, stat);
 452                 return ide_stopped;
 453         }
 454
 455         /* Still data left to transfer. */
 456         ide_set_handler(drive, &task_in_intr, WAIT_WORSTCASE, NULL);
 457
 458         return ide_started;
 459 }
 460
 461 /*
 462  * Handler for command with PIO data-out phase (Write/Write Multiple).
 463  */
 464 static ide_startstop_t task_out_intr (ide_drive_t *drive)
 465 {
 466         ide_hwif_t *hwif = drive->hwif;
 467         struct request *rq = HWGROUP(drive)->rq;
 468         u8 stat = hwif->INB(IDE_STATUS_REG);
 469
 470         if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 471                 return task_error(drive, rq, __FUNCTION__, stat);
 472
 473         /* Deal with unexpected ATA data phase. */
 474         if (((stat & DRQ_STAT) == 0) ^ !hwif->nleft)
 475                 return task_error(drive, rq, __FUNCTION__, stat);
 476
 477         if (!hwif->nleft) {
 478                 task_end_request(drive, rq, stat);
 479                 return ide_stopped;
 480         }
 481
 482         /* Still data left to transfer. */
 483         ide_pio_datablock(drive, rq, 1);
 484         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 485
 486         return ide_started;
 487 }
 488
 489 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive, struct request *rq)
 490 {
 491         ide_startstop_t startstop;
 492
 493         if (ide_wait_stat(&startstop, drive, DRQ_STAT,
 494                           drive->bad_wstat, WAIT_DRQ)) {
 495                 printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
 496                                 drive->name,
 497                                 drive->hwif->data_phase ? "MULT" : "",
 498                                 drive->addressing ? "_EXT" : "");
 499                 return startstop;
 500         }
 501
 502         if (!drive->unmask)
 503                 local_irq_disable();
 504
 505         ide_set_handler(drive, &task_out_intr, WAIT_WORSTCASE, NULL);
 506         ide_pio_datablock(drive, rq, 1);
 507
 508         return ide_started;
 509 }
 510
 511 int ide_raw_taskfile(ide_drive_t *drive, ide_task_t *task, u8 *buf, u16 nsect)
 512 {
 513         struct request rq;
 514
 515         memset(&rq, 0, sizeof(rq));
 516         rq.ref_count = 1;
 517         rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 518         rq.buffer = buf;
 519
 520         /*
 521          * (ks) We transfer currently only whole sectors.
 522          * This is suffient for now.  But, it would be great,
 523          * if we would find a solution to transfer any size.
 524          * To support special commands like READ LONG.
 525          */
 526         rq.hard_nr_sectors = rq.nr_sectors = nsect;
 527         rq.hard_cur_sectors = rq.current_nr_sectors = nsect;
 528
 529         if (task->tf_flags & IDE_TFLAG_WRITE)
 530                 rq.cmd_flags |= REQ_RW;
 531
 532         rq.special = task;
 533         task->rq = &rq;
 534
 535         return ide_do_drive_cmd(drive, &rq, ide_wait);
 536 }
 537
 538 EXPORT_SYMBOL(ide_raw_taskfile);
 539
 540 int ide_no_data_taskfile(ide_drive_t *drive, ide_task_t *task)
 541 {
 542         task->data_phase = TASKFILE_NO_DATA;
 543
 544         return ide_raw_taskfile(drive, task, NULL, 0);
 545 }
 546 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 547
 548 #ifdef CONFIG_IDE_TASK_IOCTL
 549 int ide_taskfile_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 550 {
 551         ide_task_request_t      *req_task;
 552         ide_task_t              args;
 553         u8 *outbuf              = NULL;
 554         u8 *inbuf               = NULL;
 555         u8 *data_buf            = NULL;
 556         int err                 = 0;
 557         int tasksize            = sizeof(struct ide_task_request_s);
 558         unsigned int taskin     = 0;
 559         unsigned int taskout    = 0;
 560         u16 nsect               = 0;
 561         char __user *buf = (char __user *)arg;
 562
 563 //      printk("IDE Taskfile ...\n");
 564
 565         req_task = kzalloc(tasksize, GFP_KERNEL);
 566         if (req_task == NULL) return -ENOMEM;
 567         if (copy_from_user(req_task, buf, tasksize)) {
 568                 kfree(req_task);
 569                 return -EFAULT;
 570         }
 571
 572         taskout = req_task->out_size;
 573         taskin  = req_task->in_size;
 574
 575         if (taskin > 65536 || taskout > 65536) {
 576                 err = -EINVAL;
 577                 goto abort;
 578         }
 579
 580         if (taskout) {
 581                 int outtotal = tasksize;
 582                 outbuf = kzalloc(taskout, GFP_KERNEL);
 583                 if (outbuf == NULL) {
 584                         err = -ENOMEM;
 585                         goto abort;
 586                 }
 587                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 588                         err = -EFAULT;
 589                         goto abort;
 590                 }
 591         }
 592
 593         if (taskin) {
 594                 int intotal = tasksize + taskout;
 595                 inbuf = kzalloc(taskin, GFP_KERNEL);
 596                 if (inbuf == NULL) {
 597                         err = -ENOMEM;
 598                         goto abort;
 599                 }
 600                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 601                         err = -EFAULT;
 602                         goto abort;
 603                 }
 604         }
 605
 606         memset(&args, 0, sizeof(ide_task_t));
 607
 608         memcpy(&args.tf_array[0], req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 609         memcpy(&args.tf_array[6], req_task->io_ports, HDIO_DRIVE_TASK_HDR_SIZE);
 610
 611         args.data_phase = req_task->data_phase;
 612
 613         args.tf_flags = IDE_TFLAG_IO_16BIT | IDE_TFLAG_DEVICE |
 614                         IDE_TFLAG_IN_TF;
 615         if (drive->addressing == 1)
 616                 args.tf_flags |= (IDE_TFLAG_LBA48 | IDE_TFLAG_IN_HOB);
 617
 618         if (req_task->out_flags.all) {
 619                 args.tf_flags |= IDE_TFLAG_FLAGGED;
 620
 621                 if (req_task->out_flags.b.data)
 622                         args.tf_flags |= IDE_TFLAG_OUT_DATA;
 623
 624                 if (req_task->out_flags.b.nsector_hob)
 625                         args.tf_flags |= IDE_TFLAG_OUT_HOB_NSECT;
 626                 if (req_task->out_flags.b.sector_hob)
 627                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAL;
 628                 if (req_task->out_flags.b.lcyl_hob)
 629                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAM;
 630                 if (req_task->out_flags.b.hcyl_hob)
 631                         args.tf_flags |= IDE_TFLAG_OUT_HOB_LBAH;
 632
 633                 if (req_task->out_flags.b.error_feature)
 634                         args.tf_flags |= IDE_TFLAG_OUT_FEATURE;
 635                 if (req_task->out_flags.b.nsector)
 636                         args.tf_flags |= IDE_TFLAG_OUT_NSECT;
 637                 if (req_task->out_flags.b.sector)
 638                         args.tf_flags |= IDE_TFLAG_OUT_LBAL;
 639                 if (req_task->out_flags.b.lcyl)
 640                         args.tf_flags |= IDE_TFLAG_OUT_LBAM;
 641                 if (req_task->out_flags.b.hcyl)
 642                         args.tf_flags |= IDE_TFLAG_OUT_LBAH;
 643         } else {
 644                 args.tf_flags |= IDE_TFLAG_OUT_TF;
 645                 if (args.tf_flags & IDE_TFLAG_LBA48)
 646                         args.tf_flags |= IDE_TFLAG_OUT_HOB;
 647         }
 648
 649         if (req_task->in_flags.b.data)
 650                 args.tf_flags |= IDE_TFLAG_IN_DATA;
 651
 652         switch(req_task->data_phase) {
 653                 case TASKFILE_MULTI_OUT:
 654                         if (!drive->mult_count) {
 655                                 /* (hs): give up if multcount is not set */
 656                                 printk(KERN_ERR "%s: %s Multimode Write " \
 657                                         "multcount is not set\n",
 658                                         drive->name, __FUNCTION__);
 659                                 err = -EPERM;
 660                                 goto abort;
 661                         }
 662                         /* fall through */
 663                 case TASKFILE_OUT:
 664                         /* fall through */
 665                 case TASKFILE_OUT_DMAQ:
 666                 case TASKFILE_OUT_DMA:
 667                         nsect = taskout / SECTOR_SIZE;
 668                         data_buf = outbuf;
 669                         break;
 670                 case TASKFILE_MULTI_IN:
 671                         if (!drive->mult_count) {
 672                                 /* (hs): give up if multcount is not set */
 673                                 printk(KERN_ERR "%s: %s Multimode Read failure " \
 674                                         "multcount is not set\n",
 675                                         drive->name, __FUNCTION__);
 676                                 err = -EPERM;
 677                                 goto abort;
 678                         }
 679                         /* fall through */
 680                 case TASKFILE_IN:
 681                         /* fall through */
 682                 case TASKFILE_IN_DMAQ:
 683                 case TASKFILE_IN_DMA:
 684                         nsect = taskin / SECTOR_SIZE;
 685                         data_buf = inbuf;
 686                         break;
 687                 case TASKFILE_NO_DATA:
 688                         break;
 689                 default:
 690                         err = -EFAULT;
 691                         goto abort;
 692         }
 693
 694         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 695                 nsect = 0;
 696         else if (!nsect) {
 697                 nsect = (args.tf.hob_nsect << 8) | args.tf.nsect;
 698
 699                 if (!nsect) {
 700                         printk(KERN_ERR "%s: in/out command without data\n",
 701                                         drive->name);
 702                         err = -EFAULT;
 703                         goto abort;
 704                 }
 705         }
 706
 707         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE)
 708                 args.tf_flags |= IDE_TFLAG_WRITE;
 709
 710         err = ide_raw_taskfile(drive, &args, data_buf, nsect);
 711
 712         memcpy(req_task->hob_ports, &args.tf_array[0], HDIO_DRIVE_HOB_HDR_SIZE - 2);
 713         memcpy(req_task->io_ports, &args.tf_array[6], HDIO_DRIVE_TASK_HDR_SIZE);
 714
 715         if ((args.tf_flags & IDE_TFLAG_FLAGGED_SET_IN_FLAGS) &&
 716             req_task->in_flags.all == 0) {
 717                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 718                 if (drive->addressing == 1)
 719                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 720         }
 721
 722         if (copy_to_user(buf, req_task, tasksize)) {
 723                 err = -EFAULT;
 724                 goto abort;
 725         }
 726         if (taskout) {
 727                 int outtotal = tasksize;
 728                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 729                         err = -EFAULT;
 730                         goto abort;
 731                 }
 732         }
 733         if (taskin) {
 734                 int intotal = tasksize + taskout;
 735                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 736                         err = -EFAULT;
 737                         goto abort;
 738                 }
 739         }
 740 abort:
 741         kfree(req_task);
 742         kfree(outbuf);
 743         kfree(inbuf);
 744
 745 //      printk("IDE Taskfile ioctl ended. rc = %i\n", err);
 746
 747         return err;
 748 }
 749 #endif
 750
 751 int ide_cmd_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 752 {
 753         u8 *buf = NULL;
 754         int bufsize = 0, err = 0;
 755         u8 args[4], xfer_rate = 0;
 756         ide_task_t tfargs;
 757         struct ide_taskfile *tf = &tfargs.tf;
 758         struct hd_driveid *id = drive->id;
 759
 760         if (NULL == (void *) arg) {
 761                 struct request rq;
 762
 763                 ide_init_drive_cmd(&rq);
 764                 rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 765
 766                 return ide_do_drive_cmd(drive, &rq, ide_wait);
 767         }
 768
 769         if (copy_from_user(args, (void __user *)arg, 4))
 770                 return -EFAULT;
 771
 772         memset(&tfargs, 0, sizeof(ide_task_t));
 773         tf->feature = args[2];
 774         if (args[0] == WIN_SMART) {
 775                 tf->nsect = args[3];
 776                 tf->lbal  = args[1];
 777                 tf->lbam  = 0x4f;
 778                 tf->lbah  = 0xc2;
 779                 tfargs.tf_flags = IDE_TFLAG_OUT_TF | IDE_TFLAG_IN_NSECT;
 780         } else {
 781                 tf->nsect = args[1];
 782                 tfargs.tf_flags = IDE_TFLAG_OUT_FEATURE |
 783                                   IDE_TFLAG_OUT_NSECT | IDE_TFLAG_IN_NSECT;
 784         }
 785         tf->command = args[0];
 786         tfargs.data_phase = args[3] ? TASKFILE_IN : TASKFILE_NO_DATA;
 787
 788         if (args[3]) {
 789                 tfargs.tf_flags |= IDE_TFLAG_IO_16BIT;
 790                 bufsize = SECTOR_WORDS * 4 * args[3];
 791                 buf = kzalloc(bufsize, GFP_KERNEL);
 792                 if (buf == NULL)
 793                         return -ENOMEM;
 794         }
 795
 796         if (tf->command == WIN_SETFEATURES &&
 797             tf->feature == SETFEATURES_XFER &&
 798             tf->nsect >= XFER_SW_DMA_0 &&
 799             (id->dma_ultra || id->dma_mword || id->dma_1word)) {
 800                 xfer_rate = args[1];
 801                 if (tf->nsect > XFER_UDMA_2 && !eighty_ninty_three(drive)) {
 802                         printk(KERN_WARNING "%s: UDMA speeds >UDMA33 cannot "
 803                                             "be set\n", drive->name);
 804                         goto abort;
 805                 }
 806         }
 807
 808         err = ide_raw_taskfile(drive, &tfargs, buf, args[3]);
 809
 810         args[0] = tf->status;
 811         args[1] = tf->error;
 812         args[2] = tf->nsect;
 813
 814         if (!err && xfer_rate) {
 815                 /* active-retuning-calls future */
 816                 ide_set_xfer_rate(drive, xfer_rate);
 817                 ide_driveid_update(drive);
 818         }
 819 abort:
 820         if (copy_to_user((void __user *)arg, &args, 4))
 821                 err = -EFAULT;
 822         if (buf) {
 823                 if (copy_to_user((void __user *)(arg + 4), buf, bufsize))
 824                         err = -EFAULT;
 825                 kfree(buf);
 826         }
 827         return err;
 828 }
 829
 830 int ide_task_ioctl (ide_drive_t *drive, unsigned int cmd, unsigned long arg)
 831 {
 832         void __user *p = (void __user *)arg;
 833         int err = 0;
 834         u8 args[7];
 835         ide_task_t task;
 836
 837         if (copy_from_user(args, p, 7))
 838                 return -EFAULT;
 839
 840         memset(&task, 0, sizeof(task));
 841         memcpy(&task.tf_array[7], &args[1], 6);
 842         task.tf.command = args[0];
 843         task.tf_flags = IDE_TFLAG_TF | IDE_TFLAG_DEVICE;
 844
 845         err = ide_no_data_taskfile(drive, &task);
 846
 847         args[0] = task.tf.command;
 848         memcpy(&args[1], &task.tf_array[7], 6);
 849
 850         if (copy_to_user(p, args, 7))
 851                 err = -EFAULT;
 852
 853         return err;
 854 }