drivers/ide/ide-taskfile.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  Copyright (C) 2000-2002        Michael Cornwell <cornwell@acm.org>
   4  *  Copyright (C) 2000-2002        Andre Hedrick <andre@linux-ide.org>
   5  *  Copyright (C) 2001-2002        Klaus Smolin
   6  *                                      IBM Storage Technology Division
   7  *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
   8  *
   9  *  The big the bad and the ugly.
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/string.h>
  14 #include <linux/kernel.h>
  15 #include <linux/export.h>
  16 #include <linux/sched.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/delay.h>
  21 #include <linux/hdreg.h>
  22 #include <linux/ide.h>
  23 #include <linux/nmi.h>
  24 #include <linux/scatterlist.h>
  25 #include <linux/uaccess.h>
  26
  27 #include <asm/io.h>
  28
  29 void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
  30 {
  31         ide_hwif_t *hwif = drive->hwif;
  32         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  33
  34         /* Be sure we're looking at the low order bytes */
  35         tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
  36
  37         tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);
  38
  39         if (cmd->tf_flags & IDE_TFLAG_LBA48) {
  40                 tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);
  41
  42                 tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
  43         }
  44 }
  45
  46 void ide_tf_dump(const char *s, struct ide_cmd *cmd)
  47 {
  48 #ifdef DEBUG
  49         printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
  50                 "lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
  51                s, cmd->tf.feature, cmd->tf.nsect,
  52                cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
  53                cmd->tf.device, cmd->tf.command);
  54         printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
  55                s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
  56 #endif
  57 }
  58
  59 int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
  60 {
  61         struct ide_cmd cmd;
  62
  63         memset(&cmd, 0, sizeof(cmd));
  64         cmd.tf.nsect = 0x01;
  65         if (drive->media == ide_disk)
  66                 cmd.tf.command = ATA_CMD_ID_ATA;
  67         else
  68                 cmd.tf.command = ATA_CMD_ID_ATAPI;
  69         cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
  70         cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
  71         cmd.protocol = ATA_PROT_PIO;
  72
  73         return ide_raw_taskfile(drive, &cmd, buf, 1);
  74 }
  75
  76 static ide_startstop_t task_no_data_intr(ide_drive_t *);
  77 static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
  78 static ide_startstop_t task_pio_intr(ide_drive_t *);
  79
  80 ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
  81 {
  82         ide_hwif_t *hwif = drive->hwif;
  83         struct ide_cmd *cmd = &hwif->cmd;
  84         struct ide_taskfile *tf = &cmd->tf;
  85         ide_handler_t *handler = NULL;
  86         const struct ide_tp_ops *tp_ops = hwif->tp_ops;
  87         const struct ide_dma_ops *dma_ops = hwif->dma_ops;
  88
  89         if (orig_cmd->protocol == ATA_PROT_PIO &&
  90             (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
  91             drive->mult_count == 0) {
  92                 pr_err("%s: multimode not set!\n", drive->name);
  93                 return ide_stopped;
  94         }
  95
  96         if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
  97                 orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;
  98
  99         memcpy(cmd, orig_cmd, sizeof(*cmd));
 100
 101         if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
 102                 ide_tf_dump(drive->name, cmd);
 103                 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
 104
 105                 if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
 106                         u8 data[2] = { cmd->tf.data, cmd->hob.data };
 107
 108                         tp_ops->output_data(drive, cmd, data, 2);
 109                 }
 110
 111                 if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
 112                         u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
 113                                   0xE0 : 0xEF;
 114
 115                         if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
 116                                 cmd->tf.device &= HIHI;
 117                         cmd->tf.device |= drive->select;
 118                 }
 119
 120                 tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
 121                 tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
 122         }
 123
 124         switch (cmd->protocol) {
 125         case ATA_PROT_PIO:
 126                 if (cmd->tf_flags & IDE_TFLAG_WRITE) {
 127                         tp_ops->exec_command(hwif, tf->command);
 128                         ndelay(400);    /* FIXME */
 129                         return pre_task_out_intr(drive, cmd);
 130                 }
 131                 handler = task_pio_intr;
 132                 fallthrough;
 133         case ATA_PROT_NODATA:
 134                 if (handler == NULL)
 135                         handler = task_no_data_intr;
 136                 ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
 137                 return ide_started;
 138         case ATA_PROT_DMA:
 139                 if (ide_dma_prepare(drive, cmd))
 140                         return ide_stopped;
 141                 hwif->expiry = dma_ops->dma_timer_expiry;
 142                 ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 143                 dma_ops->dma_start(drive);
 144                 fallthrough;
 145         default:
 146                 return ide_started;
 147         }
 148 }
 149 EXPORT_SYMBOL_GPL(do_rw_taskfile);
 150
 151 static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
 152 {
 153         ide_hwif_t *hwif = drive->hwif;
 154         struct ide_cmd *cmd = &hwif->cmd;
 155         struct ide_taskfile *tf = &cmd->tf;
 156         int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
 157         int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
 158         u8 stat;
 159
 160         local_irq_enable_in_hardirq();
 161
 162         while (1) {
 163                 stat = hwif->tp_ops->read_status(hwif);
 164                 if ((stat & ATA_BUSY) == 0 || retries-- == 0)
 165                         break;
 166                 udelay(10);
 167         };
 168
 169         if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
 170                 if (custom && tf->command == ATA_CMD_SET_MULTI) {
 171                         drive->mult_req = drive->mult_count = 0;
 172                         drive->special_flags |= IDE_SFLAG_RECALIBRATE;
 173                         (void)ide_dump_status(drive, __func__, stat);
 174                         return ide_stopped;
 175                 } else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
 176                         if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
 177                                 ide_set_handler(drive, &task_no_data_intr,
 178                                                 WAIT_WORSTCASE);
 179                                 return ide_started;
 180                         }
 181                 }
 182                 return ide_error(drive, "task_no_data_intr", stat);
 183         }
 184
 185         if (custom && tf->command == ATA_CMD_SET_MULTI)
 186                 drive->mult_count = drive->mult_req;
 187
 188         if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
 189             tf->command == ATA_CMD_CHK_POWER) {
 190                 struct request *rq = hwif->rq;
 191
 192                 if (ata_pm_request(rq))
 193                         ide_complete_pm_rq(drive, rq);
 194                 else
 195                         ide_finish_cmd(drive, cmd, stat);
 196         }
 197
 198         return ide_stopped;
 199 }
 200
 201 static u8 wait_drive_not_busy(ide_drive_t *drive)
 202 {
 203         ide_hwif_t *hwif = drive->hwif;
 204         int retries;
 205         u8 stat;
 206
 207         /*
 208          * Last sector was transferred, wait until device is ready.  This can
 209          * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
 210          */
 211         for (retries = 0; retries < 1000; retries++) {
 212                 stat = hwif->tp_ops->read_status(hwif);
 213
 214                 if (stat & ATA_BUSY)
 215                         udelay(10);
 216                 else
 217                         break;
 218         }
 219
 220         if (stat & ATA_BUSY)
 221                 pr_err("%s: drive still BUSY!\n", drive->name);
 222
 223         return stat;
 224 }
 225
 226 void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
 227                    unsigned int write, unsigned int len)
 228 {
 229         ide_hwif_t *hwif = drive->hwif;
 230         struct scatterlist *sg = hwif->sg_table;
 231         struct scatterlist *cursg = cmd->cursg;
 232         struct page *page;
 233         unsigned int offset;
 234         u8 *buf;
 235
 236         if (cursg == NULL)
 237                 cursg = cmd->cursg = sg;
 238
 239         while (len) {
 240                 unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
 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                 buf = kmap_atomic(page) + offset;
 252
 253                 cmd->nleft -= nr_bytes;
 254                 cmd->cursg_ofs += nr_bytes;
 255
 256                 if (cmd->cursg_ofs == cursg->length) {
 257                         cursg = cmd->cursg = sg_next(cmd->cursg);
 258                         cmd->cursg_ofs = 0;
 259                 }
 260
 261                 /* do the actual data transfer */
 262                 if (write)
 263                         hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
 264                 else
 265                         hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);
 266
 267                 kunmap_atomic(buf);
 268
 269                 len -= nr_bytes;
 270         }
 271 }
 272 EXPORT_SYMBOL_GPL(ide_pio_bytes);
 273
 274 static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
 275                               unsigned int write)
 276 {
 277         unsigned int nr_bytes;
 278
 279         u8 saved_io_32bit = drive->io_32bit;
 280
 281         if (cmd->tf_flags & IDE_TFLAG_FS)
 282                 scsi_req(cmd->rq)->result = 0;
 283
 284         if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
 285                 drive->io_32bit = 0;
 286
 287         touch_softlockup_watchdog();
 288
 289         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 290                 nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
 291         else
 292                 nr_bytes = SECTOR_SIZE;
 293
 294         ide_pio_bytes(drive, cmd, write, nr_bytes);
 295
 296         drive->io_32bit = saved_io_32bit;
 297 }
 298
 299 static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
 300 {
 301         if (cmd->tf_flags & IDE_TFLAG_FS) {
 302                 int nr_bytes = cmd->nbytes - cmd->nleft;
 303
 304                 if (cmd->protocol == ATA_PROT_PIO &&
 305                     ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
 306                         if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
 307                                 nr_bytes -= drive->mult_count << 9;
 308                         else
 309                                 nr_bytes -= SECTOR_SIZE;
 310                 }
 311
 312                 if (nr_bytes > 0)
 313                         ide_complete_rq(drive, BLK_STS_OK, nr_bytes);
 314         }
 315 }
 316
 317 void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
 318 {
 319         struct request *rq = drive->hwif->rq;
 320         u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
 321         u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);
 322
 323         ide_complete_cmd(drive, cmd, stat, err);
 324         scsi_req(rq)->result = err;
 325
 326         if (err == 0 && set_xfer) {
 327                 ide_set_xfer_rate(drive, nsect);
 328                 ide_driveid_update(drive);
 329         }
 330
 331         ide_complete_rq(drive, err ? BLK_STS_IOERR : BLK_STS_OK, blk_rq_bytes(rq));
 332 }
 333
 334 /*
 335  * Handler for command with PIO data phase.
 336  */
 337 static ide_startstop_t task_pio_intr(ide_drive_t *drive)
 338 {
 339         ide_hwif_t *hwif = drive->hwif;
 340         struct ide_cmd *cmd = &drive->hwif->cmd;
 341         u8 stat = hwif->tp_ops->read_status(hwif);
 342         u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);
 343
 344         if (write == 0) {
 345                 /* Error? */
 346                 if (stat & ATA_ERR)
 347                         goto out_err;
 348
 349                 /* Didn't want any data? Odd. */
 350                 if ((stat & ATA_DRQ) == 0) {
 351                         /* Command all done? */
 352                         if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
 353                                 goto out_end;
 354
 355                         /* Assume it was a spurious irq */
 356                         goto out_wait;
 357                 }
 358         } else {
 359                 if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
 360                         goto out_err;
 361
 362                 /* Deal with unexpected ATA data phase. */
 363                 if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
 364                         goto out_err;
 365         }
 366
 367         if (write && cmd->nleft == 0)
 368                 goto out_end;
 369
 370         /* Still data left to transfer. */
 371         ide_pio_datablock(drive, cmd, write);
 372
 373         /* Are we done? Check status and finish transfer. */
 374         if (write == 0 && cmd->nleft == 0) {
 375                 stat = wait_drive_not_busy(drive);
 376                 if (!OK_STAT(stat, 0, BAD_STAT))
 377                         goto out_err;
 378
 379                 goto out_end;
 380         }
 381 out_wait:
 382         /* Still data left to transfer. */
 383         ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
 384         return ide_started;
 385 out_end:
 386         if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
 387                 ide_finish_cmd(drive, cmd, stat);
 388         else
 389                 ide_complete_rq(drive, BLK_STS_OK, blk_rq_sectors(cmd->rq) << 9);
 390         return ide_stopped;
 391 out_err:
 392         ide_error_cmd(drive, cmd);
 393         return ide_error(drive, __func__, stat);
 394 }
 395
 396 static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
 397                                          struct ide_cmd *cmd)
 398 {
 399         ide_startstop_t startstop;
 400
 401         if (ide_wait_stat(&startstop, drive, ATA_DRQ,
 402                           drive->bad_wstat, WAIT_DRQ)) {
 403                 pr_err("%s: no DRQ after issuing %sWRITE%s\n", 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 (!force_irqthreads && (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,
 426                 (cmd->tf_flags & IDE_TFLAG_WRITE) ?
 427                         REQ_OP_DRV_OUT : REQ_OP_DRV_IN, 0);
 428         ide_req(rq)->type = ATA_PRIV_TASKFILE;
 429
 430         /*
 431          * (ks) We transfer currently only whole sectors.
 432          * This is suffient for now.  But, it would be great,
 433          * if we would find a solution to transfer any size.
 434          * To support special commands like READ LONG.
 435          */
 436         if (nsect) {
 437                 error = blk_rq_map_kern(drive->queue, rq, buf,
 438                                         nsect * SECTOR_SIZE, GFP_NOIO);
 439                 if (error)
 440                         goto put_req;
 441         }
 442
 443         ide_req(rq)->special = cmd;
 444         cmd->rq = rq;
 445
 446         blk_execute_rq(drive->queue, NULL, rq, 0);
 447         error = scsi_req(rq)->result ? -EIO : 0;
 448 put_req:
 449         blk_put_request(rq);
 450         return error;
 451 }
 452 EXPORT_SYMBOL(ide_raw_taskfile);
 453
 454 int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
 455 {
 456         cmd->protocol = ATA_PROT_NODATA;
 457
 458         return ide_raw_taskfile(drive, cmd, NULL, 0);
 459 }
 460 EXPORT_SYMBOL_GPL(ide_no_data_taskfile);
 461
 462 #ifdef CONFIG_IDE_TASK_IOCTL
 463 int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 464 {
 465         ide_task_request_t      *req_task;
 466         struct ide_cmd          cmd;
 467         u8 *outbuf              = NULL;
 468         u8 *inbuf               = NULL;
 469         u8 *data_buf            = NULL;
 470         int err                 = 0;
 471         int tasksize            = sizeof(struct ide_task_request_s);
 472         unsigned int taskin     = 0;
 473         unsigned int taskout    = 0;
 474         u16 nsect               = 0;
 475         char __user *buf = (char __user *)arg;
 476
 477         req_task = memdup_user(buf, tasksize);
 478         if (IS_ERR(req_task))
 479                 return PTR_ERR(req_task);
 480
 481         taskout = req_task->out_size;
 482         taskin  = req_task->in_size;
 483
 484         if (taskin > 65536 || taskout > 65536) {
 485                 err = -EINVAL;
 486                 goto abort;
 487         }
 488
 489         if (taskout) {
 490                 int outtotal = tasksize;
 491                 outbuf = kzalloc(taskout, GFP_KERNEL);
 492                 if (outbuf == NULL) {
 493                         err = -ENOMEM;
 494                         goto abort;
 495                 }
 496                 if (copy_from_user(outbuf, buf + outtotal, taskout)) {
 497                         err = -EFAULT;
 498                         goto abort;
 499                 }
 500         }
 501
 502         if (taskin) {
 503                 int intotal = tasksize + taskout;
 504                 inbuf = kzalloc(taskin, GFP_KERNEL);
 505                 if (inbuf == NULL) {
 506                         err = -ENOMEM;
 507                         goto abort;
 508                 }
 509                 if (copy_from_user(inbuf, buf + intotal, taskin)) {
 510                         err = -EFAULT;
 511                         goto abort;
 512                 }
 513         }
 514
 515         memset(&cmd, 0, sizeof(cmd));
 516
 517         memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 518         memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);
 519
 520         cmd.valid.out.tf = IDE_VALID_DEVICE;
 521         cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
 522         cmd.tf_flags = IDE_TFLAG_IO_16BIT;
 523
 524         if (drive->dev_flags & IDE_DFLAG_LBA48) {
 525                 cmd.tf_flags |= IDE_TFLAG_LBA48;
 526                 cmd.valid.in.hob = IDE_VALID_IN_HOB;
 527         }
 528
 529         if (req_task->out_flags.all) {
 530                 cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;
 531
 532                 if (req_task->out_flags.b.data)
 533                         cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;
 534
 535                 if (req_task->out_flags.b.nsector_hob)
 536                         cmd.valid.out.hob |= IDE_VALID_NSECT;
 537                 if (req_task->out_flags.b.sector_hob)
 538                         cmd.valid.out.hob |= IDE_VALID_LBAL;
 539                 if (req_task->out_flags.b.lcyl_hob)
 540                         cmd.valid.out.hob |= IDE_VALID_LBAM;
 541                 if (req_task->out_flags.b.hcyl_hob)
 542                         cmd.valid.out.hob |= IDE_VALID_LBAH;
 543
 544                 if (req_task->out_flags.b.error_feature)
 545                         cmd.valid.out.tf  |= IDE_VALID_FEATURE;
 546                 if (req_task->out_flags.b.nsector)
 547                         cmd.valid.out.tf  |= IDE_VALID_NSECT;
 548                 if (req_task->out_flags.b.sector)
 549                         cmd.valid.out.tf  |= IDE_VALID_LBAL;
 550                 if (req_task->out_flags.b.lcyl)
 551                         cmd.valid.out.tf  |= IDE_VALID_LBAM;
 552                 if (req_task->out_flags.b.hcyl)
 553                         cmd.valid.out.tf  |= IDE_VALID_LBAH;
 554         } else {
 555                 cmd.valid.out.tf |= IDE_VALID_OUT_TF;
 556                 if (cmd.tf_flags & IDE_TFLAG_LBA48)
 557                         cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
 558         }
 559
 560         if (req_task->in_flags.b.data)
 561                 cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;
 562
 563         if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
 564                 /* fixup data phase if needed */
 565                 if (req_task->data_phase == TASKFILE_IN_DMAQ ||
 566                     req_task->data_phase == TASKFILE_IN_DMA)
 567                         cmd.tf_flags |= IDE_TFLAG_WRITE;
 568         }
 569
 570         cmd.protocol = ATA_PROT_DMA;
 571
 572         switch (req_task->data_phase) {
 573         case TASKFILE_MULTI_OUT:
 574                 if (!drive->mult_count) {
 575                         /* (hs): give up if multcount is not set */
 576                         pr_err("%s: %s Multimode Write multcount is not set\n",
 577                                 drive->name, __func__);
 578                         err = -EPERM;
 579                         goto abort;
 580                 }
 581                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 582                 fallthrough;
 583         case TASKFILE_OUT:
 584                 cmd.protocol = ATA_PROT_PIO;
 585                 fallthrough;
 586         case TASKFILE_OUT_DMAQ:
 587         case TASKFILE_OUT_DMA:
 588                 cmd.tf_flags |= IDE_TFLAG_WRITE;
 589                 nsect = taskout / SECTOR_SIZE;
 590                 data_buf = outbuf;
 591                 break;
 592         case TASKFILE_MULTI_IN:
 593                 if (!drive->mult_count) {
 594                         /* (hs): give up if multcount is not set */
 595                         pr_err("%s: %s Multimode Read multcount is not set\n",
 596                                 drive->name, __func__);
 597                         err = -EPERM;
 598                         goto abort;
 599                 }
 600                 cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
 601                 fallthrough;
 602         case TASKFILE_IN:
 603                 cmd.protocol = ATA_PROT_PIO;
 604                 fallthrough;
 605         case TASKFILE_IN_DMAQ:
 606         case TASKFILE_IN_DMA:
 607                 nsect = taskin / SECTOR_SIZE;
 608                 data_buf = inbuf;
 609                 break;
 610         case TASKFILE_NO_DATA:
 611                 cmd.protocol = ATA_PROT_NODATA;
 612                 break;
 613         default:
 614                 err = -EFAULT;
 615                 goto abort;
 616         }
 617
 618         if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
 619                 nsect = 0;
 620         else if (!nsect) {
 621                 nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;
 622
 623                 if (!nsect) {
 624                         pr_err("%s: in/out command without data\n",
 625                                         drive->name);
 626                         err = -EFAULT;
 627                         goto abort;
 628                 }
 629         }
 630
 631         err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);
 632
 633         memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
 634         memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);
 635
 636         if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
 637             req_task->in_flags.all == 0) {
 638                 req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
 639                 if (drive->dev_flags & IDE_DFLAG_LBA48)
 640                         req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
 641         }
 642
 643         if (copy_to_user(buf, req_task, tasksize)) {
 644                 err = -EFAULT;
 645                 goto abort;
 646         }
 647         if (taskout) {
 648                 int outtotal = tasksize;
 649                 if (copy_to_user(buf + outtotal, outbuf, taskout)) {
 650                         err = -EFAULT;
 651                         goto abort;
 652                 }
 653         }
 654         if (taskin) {
 655                 int intotal = tasksize + taskout;
 656                 if (copy_to_user(buf + intotal, inbuf, taskin)) {
 657                         err = -EFAULT;
 658                         goto abort;
 659                 }
 660         }
 661 abort:
 662         kfree(req_task);
 663         kfree(outbuf);
 664         kfree(inbuf);
 665
 666         return err;
 667 }
 668 #endif