aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/ide/ide-taskfile.c
blob: cc8633cbe133db4d9b7f81330ef66a547a6176ac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
/*
 *  Copyright (C) 2000-2002	   Michael Cornwell <cornwell@acm.org>
 *  Copyright (C) 2000-2002	   Andre Hedrick <andre@linux-ide.org>
 *  Copyright (C) 2001-2002	   Klaus Smolin
 *					IBM Storage Technology Division
 *  Copyright (C) 2003-2004, 2007  Bartlomiej Zolnierkiewicz
 *
 *  The big the bad and the ugly.
 */

#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/scatterlist.h>
#include <linux/uaccess.h>

#include <asm/io.h>

void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
{
	ide_hwif_t *hwif = drive->hwif;
	const struct ide_tp_ops *tp_ops = hwif->tp_ops;

	/* Be sure we're looking at the low order bytes */
	tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);

	tp_ops->tf_read(drive, &cmd->tf, cmd->valid.in.tf);

	if (cmd->tf_flags & IDE_TFLAG_LBA48) {
		tp_ops->write_devctl(hwif, ATA_HOB | ATA_DEVCTL_OBS);

		tp_ops->tf_read(drive, &cmd->hob, cmd->valid.in.hob);
	}
}

void ide_tf_dump(const char *s, struct ide_cmd *cmd)
{
#ifdef DEBUG
	printk("%s: tf: feat 0x%02x nsect 0x%02x lbal 0x%02x "
		"lbam 0x%02x lbah 0x%02x dev 0x%02x cmd 0x%02x\n",
	       s, cmd->tf.feature, cmd->tf.nsect,
	       cmd->tf.lbal, cmd->tf.lbam, cmd->tf.lbah,
	       cmd->tf.device, cmd->tf.command);
	printk("%s: hob: nsect 0x%02x lbal 0x%02x lbam 0x%02x lbah 0x%02x\n",
	       s, cmd->hob.nsect, cmd->hob.lbal, cmd->hob.lbam, cmd->hob.lbah);
#endif
}

int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
{
	struct ide_cmd cmd;

	memset(&cmd, 0, sizeof(cmd));
	cmd.tf.nsect = 0x01;
	if (drive->media == ide_disk)
		cmd.tf.command = ATA_CMD_ID_ATA;
	else
		cmd.tf.command = ATA_CMD_ID_ATAPI;
	cmd.valid.out.tf = IDE_VALID_OUT_TF | IDE_VALID_DEVICE;
	cmd.valid.in.tf  = IDE_VALID_IN_TF  | IDE_VALID_DEVICE;
	cmd.protocol = ATA_PROT_PIO;

	return ide_raw_taskfile(drive, &cmd, buf, 1);
}

static ide_startstop_t task_no_data_intr(ide_drive_t *);
static ide_startstop_t pre_task_out_intr(ide_drive_t *, struct ide_cmd *);
static ide_startstop_t task_pio_intr(ide_drive_t *);

ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_cmd *cmd = &hwif->cmd;
	struct ide_taskfile *tf = &cmd->tf;
	ide_handler_t *handler = NULL;
	const struct ide_tp_ops *tp_ops = hwif->tp_ops;
	const struct ide_dma_ops *dma_ops = hwif->dma_ops;

	if (orig_cmd->protocol == ATA_PROT_PIO &&
	    (orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
	    drive->mult_count == 0) {
		pr_err("%s: multimode not set!\n", drive->name);
		return ide_stopped;
	}

	if (orig_cmd->ftf_flags & IDE_FTFLAG_FLAGGED)
		orig_cmd->ftf_flags |= IDE_FTFLAG_SET_IN_FLAGS;

	memcpy(cmd, orig_cmd, sizeof(*cmd));

	if ((cmd->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
		ide_tf_dump(drive->name, cmd);
		tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);

		if (cmd->ftf_flags & IDE_FTFLAG_OUT_DATA) {
			u8 data[2] = { cmd->tf.data, cmd->hob.data };

			tp_ops->output_data(drive, cmd, data, 2);
		}

		if (cmd->valid.out.tf & IDE_VALID_DEVICE) {
			u8 HIHI = (cmd->tf_flags & IDE_TFLAG_LBA48) ?
				  0xE0 : 0xEF;

			if (!(cmd->ftf_flags & IDE_FTFLAG_FLAGGED))
				cmd->tf.device &= HIHI;
			cmd->tf.device |= drive->select;
		}

		tp_ops->tf_load(drive, &cmd->hob, cmd->valid.out.hob);
		tp_ops->tf_load(drive, &cmd->tf,  cmd->valid.out.tf);
	}

	switch (cmd->protocol) {
	case ATA_PROT_PIO:
		if (cmd->tf_flags & IDE_TFLAG_WRITE) {
			tp_ops->exec_command(hwif, tf->command);
			ndelay(400);	/* FIXME */
			return pre_task_out_intr(drive, cmd);
		}
		handler = task_pio_intr;
		/* fall-through */
	case ATA_PROT_NODATA:
		if (handler == NULL)
			handler = task_no_data_intr;
		ide_execute_command(drive, cmd, handler, WAIT_WORSTCASE);
		return ide_started;
	case ATA_PROT_DMA:
		if (ide_dma_prepare(drive, cmd))
			return ide_stopped;
		hwif->expiry = dma_ops->dma_timer_expiry;
		ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
		dma_ops->dma_start(drive);
	default:
		return ide_started;
	}
}
EXPORT_SYMBOL_GPL(do_rw_taskfile);

static ide_startstop_t task_no_data_intr(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_cmd *cmd = &hwif->cmd;
	struct ide_taskfile *tf = &cmd->tf;
	int custom = (cmd->tf_flags & IDE_TFLAG_CUSTOM_HANDLER) ? 1 : 0;
	int retries = (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) ? 5 : 1;
	u8 stat;

	local_irq_enable_in_hardirq();

	while (1) {
		stat = hwif->tp_ops->read_status(hwif);
		if ((stat & ATA_BUSY) == 0 || retries-- == 0)
			break;
		udelay(10);
	};

	if (!OK_STAT(stat, ATA_DRDY, BAD_STAT)) {
		if (custom && tf->command == ATA_CMD_SET_MULTI) {
			drive->mult_req = drive->mult_count = 0;
			drive->special_flags |= IDE_SFLAG_RECALIBRATE;
			(void)ide_dump_status(drive, __func__, stat);
			return ide_stopped;
		} else if (custom && tf->command == ATA_CMD_INIT_DEV_PARAMS) {
			if ((stat & (ATA_ERR | ATA_DRQ)) == 0) {
				ide_set_handler(drive, &task_no_data_intr,
						WAIT_WORSTCASE);
				return ide_started;
			}
		}
		return ide_error(drive, "task_no_data_intr", stat);
	}

	if (custom && tf->command == ATA_CMD_SET_MULTI)
		drive->mult_count = drive->mult_req;

	if (custom == 0 || tf->command == ATA_CMD_IDLEIMMEDIATE ||
	    tf->command == ATA_CMD_CHK_POWER) {
		struct request *rq = hwif->rq;

		if (blk_pm_request(rq))
			ide_complete_pm_rq(drive, rq);
		else
			ide_finish_cmd(drive, cmd, stat);
	}

	return ide_stopped;
}

static u8 wait_drive_not_busy(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	int retries;
	u8 stat;

	/*
	 * Last sector was transfered, wait until device is ready.  This can
	 * take up to 6 ms on some ATAPI devices, so we will wait max 10 ms.
	 */
	for (retries = 0; retries < 1000; retries++) {
		stat = hwif->tp_ops->read_status(hwif);

		if (stat & ATA_BUSY)
			udelay(10);
		else
			break;
	}

	if (stat & ATA_BUSY)
		pr_err("%s: drive still BUSY!\n", drive->name);

	return stat;
}

void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
		   unsigned int write, unsigned int len)
{
	ide_hwif_t *hwif = drive->hwif;
	struct scatterlist *sg = hwif->sg_table;
	struct scatterlist *cursg = cmd->cursg;
	unsigned long uninitialized_var(flags);
	struct page *page;
	unsigned int offset;
	u8 *buf;

	cursg = cmd->cursg;
	if (cursg == NULL)
		cursg = cmd->cursg = sg;

	while (len) {
		unsigned nr_bytes = min(len, cursg->length - cmd->cursg_ofs);
		int page_is_high;

		if (nr_bytes > PAGE_SIZE)
			nr_bytes = PAGE_SIZE;

		page = sg_page(cursg);
		offset = cursg->offset + cmd->cursg_ofs;

		/* get the current page and offset */
		page = nth_page(page, (offset >> PAGE_SHIFT));
		offset %= PAGE_SIZE;

		page_is_high = PageHighMem(page);
		if (page_is_high)
			local_irq_save(flags);

		buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;

		cmd->nleft -= nr_bytes;
		cmd->cursg_ofs += nr_bytes;

		if (cmd->cursg_ofs == cursg->length) {
			cursg = cmd->cursg = sg_next(cmd->cursg);
			cmd->cursg_ofs = 0;
		}

		/* do the actual data transfer */
		if (write)
			hwif->tp_ops->output_data(drive, cmd, buf, nr_bytes);
		else
			hwif->tp_ops->input_data(drive, cmd, buf, nr_bytes);

		kunmap_atomic(buf, KM_BIO_SRC_IRQ);

		if (page_is_high)
			local_irq_restore(flags);

		len -= nr_bytes;
	}
}
EXPORT_SYMBOL_GPL(ide_pio_bytes);

static void ide_pio_datablock(ide_drive_t *drive, struct ide_cmd *cmd,
			      unsigned int write)
{
	unsigned int nr_bytes;

	u8 saved_io_32bit = drive->io_32bit;

	if (cmd->tf_flags & IDE_TFLAG_FS)
		cmd->rq->errors = 0;

	if (cmd->tf_flags & IDE_TFLAG_IO_16BIT)
		drive->io_32bit = 0;

	touch_softlockup_watchdog();

	if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
		nr_bytes = min_t(unsigned, cmd->nleft, drive->mult_count << 9);
	else
		nr_bytes = SECTOR_SIZE;

	ide_pio_bytes(drive, cmd, write, nr_bytes);

	drive->io_32bit = saved_io_32bit;
}

static void ide_error_cmd(ide_drive_t *drive, struct ide_cmd *cmd)
{
	if (cmd->tf_flags & IDE_TFLAG_FS) {
		int nr_bytes = cmd->nbytes - cmd->nleft;

		if (cmd->protocol == ATA_PROT_PIO &&
		    ((cmd->tf_flags & IDE_TFLAG_WRITE) || cmd->nleft == 0)) {
			if (cmd->tf_flags & IDE_TFLAG_MULTI_PIO)
				nr_bytes -= drive->mult_count << 9;
			else
				nr_bytes -= SECTOR_SIZE;
		}

		if (nr_bytes > 0)
			ide_complete_rq(drive, 0, nr_bytes);
	}
}

void ide_finish_cmd(ide_drive_t *drive, struct ide_cmd *cmd, u8 stat)
{
	struct request *rq = drive->hwif->rq;
	u8 err = ide_read_error(drive), nsect = cmd->tf.nsect;
	u8 set_xfer = !!(cmd->tf_flags & IDE_TFLAG_SET_XFER);

	ide_complete_cmd(drive, cmd, stat, err);
	rq->errors = err;

	if (err == 0 && set_xfer) {
		ide_set_xfer_rate(drive, nsect);
		ide_driveid_update(drive);
	}

	ide_complete_rq(drive, err ? -EIO : 0, blk_rq_bytes(rq));
}

/*
 * Handler for command with PIO data phase.
 */
static ide_startstop_t task_pio_intr(ide_drive_t *drive)
{
	ide_hwif_t *hwif = drive->hwif;
	struct ide_cmd *cmd = &drive->hwif->cmd;
	u8 stat = hwif->tp_ops->read_status(hwif);
	u8 write = !!(cmd->tf_flags & IDE_TFLAG_WRITE);

	if (write == 0) {
		/* Error? */
		if (stat & ATA_ERR)
			goto out_err;

		/* Didn't want any data? Odd. */
		if ((stat & ATA_DRQ) == 0) {
			/* Command all done? */
			if (OK_STAT(stat, ATA_DRDY, ATA_BUSY))
				goto out_end;

			/* Assume it was a spurious irq */
			goto out_wait;
		}
	} else {
		if (!OK_STAT(stat, DRIVE_READY, drive->bad_wstat))
			goto out_err;

		/* Deal with unexpected ATA data phase. */
		if (((stat & ATA_DRQ) == 0) ^ (cmd->nleft == 0))
			goto out_err;
	}

	if (write && cmd->nleft == 0)
		goto out_end;

	/* Still data left to transfer. */
	ide_pio_datablock(drive, cmd, write);

	/* Are we done? Check status and finish transfer. */
	if (write == 0 && cmd->nleft == 0) {
		stat = wait_drive_not_busy(drive);
		if (!OK_STAT(stat, 0, BAD_STAT))
			goto out_err;

		goto out_end;
	}
out_wait:
	/* Still data left to transfer. */
	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);
	return ide_started;
out_end:
	if ((cmd->tf_flags & IDE_TFLAG_FS) == 0)
		ide_finish_cmd(drive, cmd, stat);
	else
		ide_complete_rq(drive, 0, blk_rq_sectors(cmd->rq) << 9);
	return ide_stopped;
out_err:
	ide_error_cmd(drive, cmd);
	return ide_error(drive, __func__, stat);
}

static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,
					 struct ide_cmd *cmd)
{
	ide_startstop_t startstop;

	if (ide_wait_stat(&startstop, drive, ATA_DRQ,
			  drive->bad_wstat, WAIT_DRQ)) {
		pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
			(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
			(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
		return startstop;
	}

	if ((drive->dev_flags & IDE_DFLAG_UNMASK) == 0)
		local_irq_disable();

	ide_set_handler(drive, &task_pio_intr, WAIT_WORSTCASE);

	ide_pio_datablock(drive, cmd, 1);

	return ide_started;
}

int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,
		     u16 nsect)
{
	struct request *rq;
	int error;

	rq = blk_get_request(drive->queue, READ, __GFP_WAIT);
	rq->cmd_type = REQ_TYPE_ATA_TASKFILE;

	if (cmd->tf_flags & IDE_TFLAG_WRITE)
		rq->cmd_flags |= REQ_RW;

	/*
	 * (ks) We transfer currently only whole sectors.
	 * This is suffient for now.  But, it would be great,
	 * if we would find a solution to transfer any size.
	 * To support special commands like READ LONG.
	 */
	if (nsect) {
		error = blk_rq_map_kern(drive->queue, rq, buf,
					nsect * SECTOR_SIZE, __GFP_WAIT);
		if (error)
			goto put_req;
	}

	rq->special = cmd;
	cmd->rq = rq;

	error = blk_execute_rq(drive->queue, NULL, rq, 0);

put_req:
	blk_put_request(rq);
	return error;
}
EXPORT_SYMBOL(ide_raw_taskfile);

int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
{
	cmd->protocol = ATA_PROT_NODATA;

	return ide_raw_taskfile(drive, cmd, NULL, 0);
}
EXPORT_SYMBOL_GPL(ide_no_data_taskfile);

#ifdef CONFIG_IDE_TASK_IOCTL
int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
{
	ide_task_request_t	*req_task;
	struct ide_cmd		cmd;
	u8 *outbuf		= NULL;
	u8 *inbuf		= NULL;
	u8 *data_buf		= NULL;
	int err			= 0;
	int tasksize		= sizeof(struct ide_task_request_s);
	unsigned int taskin	= 0;
	unsigned int taskout	= 0;
	u16 nsect		= 0;
	char __user *buf = (char __user *)arg;

	req_task = kzalloc(tasksize, GFP_KERNEL);
	if (req_task == NULL)
		return -ENOMEM;
	if (copy_from_user(req_task, buf, tasksize)) {
		kfree(req_task);
		return -EFAULT;
	}

	taskout = req_task->out_size;
	taskin  = req_task->in_size;

	if (taskin > 65536 || taskout > 65536) {
		err = -EINVAL;
		goto abort;
	}

	if (taskout) {
		int outtotal = tasksize;
		outbuf = kzalloc(taskout, GFP_KERNEL);
		if (outbuf == NULL) {
			err = -ENOMEM;
			goto abort;
		}
		if (copy_from_user(outbuf, buf + outtotal, taskout)) {
			err = -EFAULT;
			goto abort;
		}
	}

	if (taskin) {
		int intotal = tasksize + taskout;
		inbuf = kzalloc(taskin, GFP_KERNEL);
		if (inbuf == NULL) {
			err = -ENOMEM;
			goto abort;
		}
		if (copy_from_user(inbuf, buf + intotal, taskin)) {
			err = -EFAULT;
			goto abort;
		}
	}

	memset(&cmd, 0, sizeof(cmd));

	memcpy(&cmd.hob, req_task->hob_ports, HDIO_DRIVE_HOB_HDR_SIZE - 2);
	memcpy(&cmd.tf,  req_task->io_ports,  HDIO_DRIVE_TASK_HDR_SIZE);

	cmd.valid.out.tf = IDE_VALID_DEVICE;
	cmd.valid.in.tf  = IDE_VALID_DEVICE | IDE_VALID_IN_TF;
	cmd.tf_flags = IDE_TFLAG_IO_16BIT;

	if (drive->dev_flags & IDE_DFLAG_LBA48) {
		cmd.tf_flags |= IDE_TFLAG_LBA48;
		cmd.valid.in.hob = IDE_VALID_IN_HOB;
	}

	if (req_task->out_flags.all) {
		cmd.ftf_flags |= IDE_FTFLAG_FLAGGED;

		if (req_task->out_flags.b.data)
			cmd.ftf_flags |= IDE_FTFLAG_OUT_DATA;

		if (req_task->out_flags.b.nsector_hob)
			cmd.valid.out.hob |= IDE_VALID_NSECT;
		if (req_task->out_flags.b.sector_hob)
			cmd.valid.out.hob |= IDE_VALID_LBAL;
		if (req_task->out_flags.b.lcyl_hob)
			cmd.valid.out.hob |= IDE_VALID_LBAM;
		if (req_task->out_flags.b.hcyl_hob)
			cmd.valid.out.hob |= IDE_VALID_LBAH;

		if (req_task->out_flags.b.error_feature)
			cmd.valid.out.tf  |= IDE_VALID_FEATURE;
		if (req_task->out_flags.b.nsector)
			cmd.valid.out.tf  |= IDE_VALID_NSECT;
		if (req_task->out_flags.b.sector)
			cmd.valid.out.tf  |= IDE_VALID_LBAL;
		if (req_task->out_flags.b.lcyl)
			cmd.valid.out.tf  |= IDE_VALID_LBAM;
		if (req_task->out_flags.b.hcyl)
			cmd.valid.out.tf  |= IDE_VALID_LBAH;
	} else {
		cmd.valid.out.tf |= IDE_VALID_OUT_TF;
		if (cmd.tf_flags & IDE_TFLAG_LBA48)
			cmd.valid.out.hob |= IDE_VALID_OUT_HOB;
	}

	if (req_task->in_flags.b.data)
		cmd.ftf_flags |= IDE_FTFLAG_IN_DATA;

	if (req_task->req_cmd == IDE_DRIVE_TASK_RAW_WRITE) {
		/* fixup data phase if needed */
		if (req_task->data_phase == TASKFILE_IN_DMAQ ||
		    req_task->data_phase == TASKFILE_IN_DMA)
			cmd.tf_flags |= IDE_TFLAG_WRITE;
	}

	cmd.protocol = ATA_PROT_DMA;

	switch (req_task->data_phase) {
	case TASKFILE_MULTI_OUT:
		if (!drive->mult_count) {
			/* (hs): give up if multcount is not set */
			pr_err("%s: %s Multimode Write multcount is not set\n",
				drive->name, __func__);
			err = -EPERM;
			goto abort;
		}
		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
		/* fall through */
	case TASKFILE_OUT:
		cmd.protocol = ATA_PROT_PIO;
		/* fall through */
	case TASKFILE_OUT_DMAQ:
	case TASKFILE_OUT_DMA:
		cmd.tf_flags |= IDE_TFLAG_WRITE;
		nsect = taskout / SECTOR_SIZE;
		data_buf = outbuf;
		break;
	case TASKFILE_MULTI_IN:
		if (!drive->mult_count) {
			/* (hs): give up if multcount is not set */
			pr_err("%s: %s Multimode Read multcount is not set\n",
				drive->name, __func__);
			err = -EPERM;
			goto abort;
		}
		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
		/* fall through */
	case TASKFILE_IN:
		cmd.protocol = ATA_PROT_PIO;
		/* fall through */
	case TASKFILE_IN_DMAQ:
	case TASKFILE_IN_DMA:
		nsect = taskin / SECTOR_SIZE;
		data_buf = inbuf;
		break;
	case TASKFILE_NO_DATA:
		cmd.protocol = ATA_PROT_NODATA;
		break;
	default:
		err = -EFAULT;
		goto abort;
	}

	if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
		nsect = 0;
	else if (!nsect) {
		nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;

		if (!nsect) {
			pr_err("%s: in/out command without data\n",
					drive->name);
			err = -EFAULT;
			goto abort;
		}
	}

	err = ide_raw_taskfile(drive, &cmd, data_buf, nsect);

	memcpy(req_task->hob_ports, &cmd.hob, HDIO_DRIVE_HOB_HDR_SIZE - 2);
	memcpy(req_task->io_ports,  &cmd.tf,  HDIO_DRIVE_TASK_HDR_SIZE);

	if ((cmd.ftf_flags & IDE_FTFLAG_SET_IN_FLAGS) &&
	    req_task->in_flags.all == 0) {
		req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS;
		if (drive->dev_flags & IDE_DFLAG_LBA48)
			req_task->in_flags.all |= (IDE_HOB_STD_IN_FLAGS << 8);
	}

	if (copy_to_user(buf, req_task, tasksize)) {
		err = -EFAULT;
		goto abort;
	}
	if (taskout) {
		int outtotal = tasksize;
		if (copy_to_user(buf + outtotal, outbuf, taskout)) {
			err = -EFAULT;
			goto abort;
		}
	}
	if (taskin) {
		int intotal = tasksize + taskout;
		if (copy_to_user(buf + intotal, inbuf, taskin)) {
			err = -EFAULT;
			goto abort;
		}
	}
abort:
	kfree(req_task);
	kfree(outbuf);
	kfree(inbuf);

	return err;
}
#endif