summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/carl9170/debug.c
blob: 1c0af9cd9a85e3fa88b1f5f79c4e1042a0e0c920 (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
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
/*
 * Atheros CARL9170 driver
 *
 * debug(fs) probing
 *
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2009, 2010, Christian Lamparter <chunkeey@googlemail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, see
 * http://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *    Copyright (c) 2008-2009 Atheros Communications, Inc.
 *
 *    Permission to use, copy, modify, and/or distribute this software for any
 *    purpose with or without fee is hereby granted, provided that the above
 *    copyright notice and this permission notice appear in all copies.
 *
 *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/vmalloc.h>
#include "carl9170.h"
#include "cmd.h"

#define ADD(buf, off, max, fmt, args...)				\
	off += snprintf(&buf[off], max - off, fmt, ##args);


struct carl9170_debugfs_fops {
	unsigned int read_bufsize;
	umode_t attr;
	char *(*read)(struct ar9170 *ar, char *buf, size_t bufsize,
		      ssize_t *len);
	ssize_t (*write)(struct ar9170 *aru, const char *buf, size_t size);
	const struct file_operations fops;

	enum carl9170_device_state req_dev_state;
};

static ssize_t carl9170_debugfs_read(struct file *file, char __user *userbuf,
				     size_t count, loff_t *ppos)
{
	struct carl9170_debugfs_fops *dfops;
	struct ar9170 *ar;
	char *buf = NULL, *res_buf = NULL;
	ssize_t ret = 0;
	int err = 0;

	if (!count)
		return 0;

	ar = file->private_data;

	if (!ar)
		return -ENODEV;
	dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);

	if (!dfops->read)
		return -ENOSYS;

	if (dfops->read_bufsize) {
		buf = vmalloc(dfops->read_bufsize);
		if (!buf)
			return -ENOMEM;
	}

	mutex_lock(&ar->mutex);
	if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
		err = -ENODEV;
		res_buf = buf;
		goto out_free;
	}

	res_buf = dfops->read(ar, buf, dfops->read_bufsize, &ret);

	if (ret > 0)
		err = simple_read_from_buffer(userbuf, count, ppos,
					      res_buf, ret);
	else
		err = ret;

	WARN_ON_ONCE(dfops->read_bufsize && (res_buf != buf));

out_free:
	vfree(res_buf);
	mutex_unlock(&ar->mutex);
	return err;
}

static ssize_t carl9170_debugfs_write(struct file *file,
	const char __user *userbuf, size_t count, loff_t *ppos)
{
	struct carl9170_debugfs_fops *dfops;
	struct ar9170 *ar;
	char *buf = NULL;
	int err = 0;

	if (!count)
		return 0;

	if (count > PAGE_SIZE)
		return -E2BIG;

	ar = file->private_data;

	if (!ar)
		return -ENODEV;
	dfops = container_of(file->f_op, struct carl9170_debugfs_fops, fops);

	if (!dfops->write)
		return -ENOSYS;

	buf = vmalloc(count);
	if (!buf)
		return -ENOMEM;

	if (copy_from_user(buf, userbuf, count)) {
		err = -EFAULT;
		goto out_free;
	}

	if (mutex_trylock(&ar->mutex) == 0) {
		err = -EAGAIN;
		goto out_free;
	}

	if (!CHK_DEV_STATE(ar, dfops->req_dev_state)) {
		err = -ENODEV;
		goto out_unlock;
	}

	err = dfops->write(ar, buf, count);
	if (err)
		goto out_unlock;

out_unlock:
	mutex_unlock(&ar->mutex);

out_free:
	vfree(buf);
	return err;
}

#define __DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,	\
			       _attr, _dstate)				\
static const struct carl9170_debugfs_fops carl_debugfs_##name ##_ops = {\
	.read_bufsize = _read_bufsize,					\
	.read = _read,							\
	.write = _write,						\
	.attr = _attr,							\
	.req_dev_state = _dstate,					\
	.fops = {							\
		.open	= simple_open,					\
		.read	= carl9170_debugfs_read,			\
		.write	= carl9170_debugfs_write,			\
		.owner	= THIS_MODULE					\
	},								\
}

#define DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize, _attr)	\
	__DEBUGFS_DECLARE_FILE(name, _read, _write, _read_bufsize,	\
			       _attr, CARL9170_STARTED)			\

#define DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)			\
	DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
			     NULL, _read_bufsize, S_IRUSR)

#define DEBUGFS_DECLARE_WO_FILE(name)					\
	DEBUGFS_DECLARE_FILE(name, NULL, carl9170_debugfs_##name ##_write,\
			     0, S_IWUSR)

#define DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize)			\
	DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
			     carl9170_debugfs_##name ##_write,		\
			     _read_bufsize, S_IRUSR | S_IWUSR)

#define __DEBUGFS_DECLARE_RW_FILE(name, _read_bufsize, _dstate)		\
	__DEBUGFS_DECLARE_FILE(name, carl9170_debugfs_##name ##_read,	\
			     carl9170_debugfs_##name ##_write,		\
			     _read_bufsize, S_IRUSR | S_IWUSR, _dstate)

#define DEBUGFS_READONLY_FILE(name, _read_bufsize, fmt, value...)	\
static char *carl9170_debugfs_ ##name ## _read(struct ar9170 *ar,	\
					     char *buf, size_t buf_size,\
					     ssize_t *len)		\
{									\
	ADD(buf, *len, buf_size, fmt "\n", ##value);			\
	return buf;							\
}									\
DEBUGFS_DECLARE_RO_FILE(name, _read_bufsize)

static char *carl9170_debugfs_mem_usage_read(struct ar9170 *ar, char *buf,
					     size_t bufsize, ssize_t *len)
{
	ADD(buf, *len, bufsize, "jar: [");

	spin_lock_bh(&ar->mem_lock);

	*len += bitmap_scnprintf(&buf[*len], bufsize - *len,
				  ar->mem_bitmap, ar->fw.mem_blocks);

	ADD(buf, *len, bufsize, "]\n");

	ADD(buf, *len, bufsize, "cookies: used:%3d / total:%3d, allocs:%d\n",
	    bitmap_weight(ar->mem_bitmap, ar->fw.mem_blocks),
	    ar->fw.mem_blocks, atomic_read(&ar->mem_allocs));

	ADD(buf, *len, bufsize, "memory: free:%3d (%3d KiB) / total:%3d KiB)\n",
	    atomic_read(&ar->mem_free_blocks),
	    (atomic_read(&ar->mem_free_blocks) * ar->fw.mem_block_size) / 1024,
	    (ar->fw.mem_blocks * ar->fw.mem_block_size) / 1024);

	spin_unlock_bh(&ar->mem_lock);

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(mem_usage, 512);

static char *carl9170_debugfs_qos_stat_read(struct ar9170 *ar, char *buf,
					    size_t bufsize, ssize_t *len)
{
	ADD(buf, *len, bufsize, "%s QoS AC\n", modparam_noht ? "Hardware" :
	    "Software");

	ADD(buf, *len, bufsize, "[     VO            VI       "
				 "     BE            BK      ]\n");

	spin_lock_bh(&ar->tx_stats_lock);
	ADD(buf, *len, bufsize, "[length/limit  length/limit  "
				 "length/limit  length/limit ]\n"
				"[   %3d/%3d       %3d/%3d    "
				 "   %3d/%3d       %3d/%3d   ]\n\n",
	    ar->tx_stats[0].len, ar->tx_stats[0].limit,
	    ar->tx_stats[1].len, ar->tx_stats[1].limit,
	    ar->tx_stats[2].len, ar->tx_stats[2].limit,
	    ar->tx_stats[3].len, ar->tx_stats[3].limit);

	ADD(buf, *len, bufsize, "[    total         total     "
				 "    total         total    ]\n"
				"[%10d    %10d    %10d    %10d   ]\n\n",
	    ar->tx_stats[0].count, ar->tx_stats[1].count,
	    ar->tx_stats[2].count, ar->tx_stats[3].count);

	spin_unlock_bh(&ar->tx_stats_lock);

	ADD(buf, *len, bufsize, "[  pend/waittx   pend/waittx "
				 "  pend/waittx   pend/waittx]\n"
				"[   %3d/%3d       %3d/%3d    "
				 "   %3d/%3d       %3d/%3d   ]\n\n",
	    skb_queue_len(&ar->tx_pending[0]),
	    skb_queue_len(&ar->tx_status[0]),
	    skb_queue_len(&ar->tx_pending[1]),
	    skb_queue_len(&ar->tx_status[1]),
	    skb_queue_len(&ar->tx_pending[2]),
	    skb_queue_len(&ar->tx_status[2]),
	    skb_queue_len(&ar->tx_pending[3]),
	    skb_queue_len(&ar->tx_status[3]));

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(qos_stat, 512);

static void carl9170_debugfs_format_frame(struct ar9170 *ar,
	struct sk_buff *skb, const char *prefix, char *buf,
	ssize_t *off, ssize_t bufsize)
{
	struct _carl9170_tx_superframe *txc = (void *) skb->data;
	struct ieee80211_tx_info *txinfo = IEEE80211_SKB_CB(skb);
	struct carl9170_tx_info *arinfo = (void *) txinfo->rate_driver_data;
	struct ieee80211_hdr *hdr = (void *) txc->frame_data;

	ADD(buf, *off, bufsize, "%s %p, c:%2x, DA:%pM, sq:%4d, mc:%.4x, "
	    "pc:%.8x, to:%d ms\n", prefix, skb, txc->s.cookie,
	    ieee80211_get_DA(hdr), get_seq_h(hdr),
	    le16_to_cpu(txc->f.mac_control), le32_to_cpu(txc->f.phy_control),
	    jiffies_to_msecs(jiffies - arinfo->timeout));
}


static char *carl9170_debugfs_ampdu_state_read(struct ar9170 *ar, char *buf,
					       size_t bufsize, ssize_t *len)
{
	struct carl9170_sta_tid *iter;
	struct sk_buff *skb;
	int cnt = 0, fc;
	int offset;

	rcu_read_lock();
	list_for_each_entry_rcu(iter, &ar->tx_ampdu_list, list) {

		spin_lock_bh(&iter->lock);
		ADD(buf, *len, bufsize, "Entry: #%2d TID:%1d, BSN:%4d, "
		    "SNX:%4d, HSN:%4d, BAW:%2d, state:%1d, toggles:%d\n",
		    cnt, iter->tid, iter->bsn, iter->snx, iter->hsn,
		    iter->max, iter->state, iter->counter);

		ADD(buf, *len, bufsize, "\tWindow:  [");

		*len += bitmap_scnprintf(&buf[*len], bufsize - *len,
			iter->bitmap, CARL9170_BAW_BITS);

#define BM_STR_OFF(offset)					\
	((CARL9170_BAW_BITS - (offset) - 1) / 4 +		\
	 (CARL9170_BAW_BITS - (offset) - 1) / 32 + 1)

		ADD(buf, *len, bufsize, ",W]\n");

		offset = BM_STR_OFF(0);
		ADD(buf, *len, bufsize, "\tBase Seq: %*s\n", offset, "T");

		offset = BM_STR_OFF(SEQ_DIFF(iter->snx, iter->bsn));
		ADD(buf, *len, bufsize, "\tNext Seq: %*s\n", offset, "W");

		offset = BM_STR_OFF(((int)iter->hsn - (int)iter->bsn) %
				     CARL9170_BAW_BITS);
		ADD(buf, *len, bufsize, "\tLast Seq: %*s\n", offset, "N");

		ADD(buf, *len, bufsize, "\tPre-Aggregation reorder buffer: "
		    " currently queued:%d\n", skb_queue_len(&iter->queue));

		fc = 0;
		skb_queue_walk(&iter->queue, skb) {
			char prefix[32];

			snprintf(prefix, sizeof(prefix), "\t\t%3d :", fc);
			carl9170_debugfs_format_frame(ar, skb, prefix, buf,
						      len, bufsize);

			fc++;
		}
		spin_unlock_bh(&iter->lock);
		cnt++;
	}
	rcu_read_unlock();

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(ampdu_state, 8000);

static void carl9170_debugfs_queue_dump(struct ar9170 *ar, char *buf,
	ssize_t *len, size_t bufsize, struct sk_buff_head *queue)
{
	struct sk_buff *skb;
	char prefix[16];
	int fc = 0;

	spin_lock_bh(&queue->lock);
	skb_queue_walk(queue, skb) {
		snprintf(prefix, sizeof(prefix), "%3d :", fc);
		carl9170_debugfs_format_frame(ar, skb, prefix, buf,
					      len, bufsize);
		fc++;
	}
	spin_unlock_bh(&queue->lock);
}

#define DEBUGFS_QUEUE_DUMP(q, qi)					\
static char *carl9170_debugfs_##q ##_##qi ##_read(struct ar9170 *ar,	\
	char *buf, size_t bufsize, ssize_t *len)			\
{									\
	carl9170_debugfs_queue_dump(ar, buf, len, bufsize, &ar->q[qi]);	\
	return buf;							\
}									\
DEBUGFS_DECLARE_RO_FILE(q##_##qi, 8000);

static char *carl9170_debugfs_sta_psm_read(struct ar9170 *ar, char *buf,
					   size_t bufsize, ssize_t *len)
{
	ADD(buf, *len, bufsize, "psm state: %s\n", (ar->ps.off_override ?
	    "FORCE CAM" : (ar->ps.state ? "PSM" : "CAM")));

	ADD(buf, *len, bufsize, "sleep duration: %d ms.\n", ar->ps.sleep_ms);
	ADD(buf, *len, bufsize, "last power-state transition: %d ms ago.\n",
	    jiffies_to_msecs(jiffies - ar->ps.last_action));
	ADD(buf, *len, bufsize, "last CAM->PSM transition: %d ms ago.\n",
	    jiffies_to_msecs(jiffies - ar->ps.last_slept));

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(sta_psm, 160);

static char *carl9170_debugfs_tx_stuck_read(struct ar9170 *ar, char *buf,
					    size_t bufsize, ssize_t *len)
{
	int i;

	for (i = 0; i < ar->hw->queues; i++) {
		ADD(buf, *len, bufsize, "TX queue [%d]: %10d max:%10d ms.\n",
		    i, ieee80211_queue_stopped(ar->hw, i) ?
		    jiffies_to_msecs(jiffies - ar->queue_stop_timeout[i]) : 0,
		    jiffies_to_msecs(ar->max_queue_stop_timeout[i]));

		ar->max_queue_stop_timeout[i] = 0;
	}

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(tx_stuck, 180);

static char *carl9170_debugfs_phy_noise_read(struct ar9170 *ar, char *buf,
					     size_t bufsize, ssize_t *len)
{
	int err;

	err = carl9170_get_noisefloor(ar);
	if (err) {
		*len = err;
		return buf;
	}

	ADD(buf, *len, bufsize, "Chain 0: %10d dBm, ext. chan.:%10d dBm\n",
	    ar->noise[0], ar->noise[2]);
	ADD(buf, *len, bufsize, "Chain 2: %10d dBm, ext. chan.:%10d dBm\n",
	    ar->noise[1], ar->noise[3]);

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(phy_noise, 180);

static char *carl9170_debugfs_vif_dump_read(struct ar9170 *ar, char *buf,
					    size_t bufsize, ssize_t *len)
{
	struct carl9170_vif_info *iter;
	int i = 0;

	ADD(buf, *len, bufsize, "registered VIFs:%d \\ %d\n",
	    ar->vifs, ar->fw.vif_num);

	ADD(buf, *len, bufsize, "VIF bitmap: [");

	*len += bitmap_scnprintf(&buf[*len], bufsize - *len,
				 &ar->vif_bitmap, ar->fw.vif_num);

	ADD(buf, *len, bufsize, "]\n");

	rcu_read_lock();
	list_for_each_entry_rcu(iter, &ar->vif_list, list) {
		struct ieee80211_vif *vif = carl9170_get_vif(iter);
		ADD(buf, *len, bufsize, "\t%d = [%s VIF, id:%d, type:%x "
		    " mac:%pM %s]\n", i, (carl9170_get_main_vif(ar) == vif ?
		    "Master" : " Slave"), iter->id, vif->type, vif->addr,
		    iter->enable_beacon ? "beaconing " : "");
		i++;
	}
	rcu_read_unlock();

	return buf;
}
DEBUGFS_DECLARE_RO_FILE(vif_dump, 8000);

#define UPDATE_COUNTER(ar, name)	({				\
	u32 __tmp[ARRAY_SIZE(name##_regs)];				\
	unsigned int __i, __err = -ENODEV;				\
									\
	for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {		\
		__tmp[__i] = name##_regs[__i].reg;			\
		ar->debug.stats.name##_counter[__i] = 0;		\
	}								\
									\
	if (IS_STARTED(ar))						\
		__err = carl9170_read_mreg(ar, ARRAY_SIZE(name##_regs),	\
			__tmp, ar->debug.stats.name##_counter);		\
	(__err); })

#define TALLY_SUM_UP(ar, name)	do {					\
	unsigned int __i;						\
									\
	for (__i = 0; __i < ARRAY_SIZE(name##_regs); __i++) {		\
		ar->debug.stats.name##_sum[__i] +=			\
			ar->debug.stats.name##_counter[__i];		\
	}								\
} while (0)

#define DEBUGFS_HW_TALLY_FILE(name, f)					\
static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,	\
	 char *dum, size_t bufsize, ssize_t *ret)			\
{									\
	char *buf;							\
	int i, max_len, err;						\
									\
	max_len = ARRAY_SIZE(name##_regs) * 80;				\
	buf = vmalloc(max_len);						\
	if (!buf)							\
		return NULL;						\
									\
	err = UPDATE_COUNTER(ar, name);					\
	if (err) {							\
		*ret = err;						\
		return buf;						\
	}								\
									\
	TALLY_SUM_UP(ar, name);						\
									\
	for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {			\
		ADD(buf, *ret, max_len, "%22s = %" f "[+%" f "]\n",	\
		    name##_regs[i].nreg, ar->debug.stats.name ##_sum[i],\
		    ar->debug.stats.name ##_counter[i]);		\
	}								\
									\
	return buf;							\
}									\
DEBUGFS_DECLARE_RO_FILE(name, 0);

#define DEBUGFS_HW_REG_FILE(name, f)					\
static char *carl9170_debugfs_##name ## _read(struct ar9170 *ar,	\
	char *dum, size_t bufsize, ssize_t *ret)			\
{									\
	char *buf;							\
	int i, max_len, err;						\
									\
	max_len = ARRAY_SIZE(name##_regs) * 80;				\
	buf = vmalloc(max_len);						\
	if (!buf)							\
		return NULL;						\
									\
	err = UPDATE_COUNTER(ar, name);					\
	if (err) {							\
		*ret = err;						\
		return buf;						\
	}								\
									\
	for (i = 0; i < ARRAY_SIZE(name##_regs); i++) {			\
		ADD(buf, *ret, max_len, "%22s = %" f "\n",		\
		    name##_regs[i].nreg,				\
		    ar->debug.stats.name##_counter[i]);			\
	}								\
									\
	return buf;							\
}									\
DEBUGFS_DECLARE_RO_FILE(name, 0);

static ssize_t carl9170_debugfs_hw_ioread32_write(struct ar9170 *ar,
	const char *buf, size_t count)
{
	int err = 0, i, n = 0, max_len = 32, res;
	unsigned int reg, tmp;

	if (!count)
		return 0;

	if (count > max_len)
		return -E2BIG;

	res = sscanf(buf, "0x%X %d", &reg, &n);
	if (res < 1) {
		err = -EINVAL;
		goto out;
	}

	if (res == 1)
		n = 1;

	if (n > 15) {
		err = -EMSGSIZE;
		goto out;
	}

	if ((reg >= 0x280000) || ((reg + (n << 2)) >= 0x280000)) {
		err = -EADDRNOTAVAIL;
		goto out;
	}

	if (reg & 3) {
		err = -EINVAL;
		goto out;
	}

	for (i = 0; i < n; i++) {
		err = carl9170_read_reg(ar, reg + (i << 2), &tmp);
		if (err)
			goto out;

		ar->debug.ring[ar->debug.ring_tail].reg = reg + (i << 2);
		ar->debug.ring[ar->debug.ring_tail].value = tmp;
		ar->debug.ring_tail++;
		ar->debug.ring_tail %= CARL9170_DEBUG_RING_SIZE;
	}

out:
	return err ? err : count;
}

static char *carl9170_debugfs_hw_ioread32_read(struct ar9170 *ar, char *buf,
					       size_t bufsize, ssize_t *ret)
{
	int i = 0;

	while (ar->debug.ring_head != ar->debug.ring_tail) {
		ADD(buf, *ret, bufsize, "%.8x = %.8x\n",
		    ar->debug.ring[ar->debug.ring_head].reg,
		    ar->debug.ring[ar->debug.ring_head].value);

		ar->debug.ring_head++;
		ar->debug.ring_head %= CARL9170_DEBUG_RING_SIZE;

		if (i++ == 64)
			break;
	}
	ar->debug.ring_head = ar->debug.ring_tail;
	return buf;
}
DEBUGFS_DECLARE_RW_FILE(hw_ioread32, CARL9170_DEBUG_RING_SIZE * 40);

static ssize_t carl9170_debugfs_bug_write(struct ar9170 *ar, const char *buf,
					  size_t count)
{
	int err;

	if (count < 1)
		return -EINVAL;

	switch (buf[0]) {
	case 'F':
		ar->needs_full_reset = true;
		break;

	case 'R':
		if (!IS_STARTED(ar)) {
			err = -EAGAIN;
			goto out;
		}

		ar->needs_full_reset = false;
		break;

	case 'M':
		err = carl9170_mac_reset(ar);
		if (err < 0)
			count = err;

		goto out;

	case 'P':
		err = carl9170_set_channel(ar, ar->hw->conf.chandef.chan,
			cfg80211_get_chandef_type(&ar->hw->conf.chandef));
		if (err < 0)
			count = err;

		goto out;

	default:
		return -EINVAL;
	}

	carl9170_restart(ar, CARL9170_RR_USER_REQUEST);

out:
	return count;
}

static char *carl9170_debugfs_bug_read(struct ar9170 *ar, char *buf,
				       size_t bufsize, ssize_t *ret)
{
	ADD(buf, *ret, bufsize, "[P]hy reinit, [R]estart, [F]ull usb reset, "
	    "[M]ac reset\n");
	ADD(buf, *ret, bufsize, "firmware restarts:%d, last reason:%d\n",
		ar->restart_counter, ar->last_reason);
	ADD(buf, *ret, bufsize, "phy reinit errors:%d (%d)\n",
		ar->total_chan_fail, ar->chan_fail);
	ADD(buf, *ret, bufsize, "reported firmware errors:%d\n",
		ar->fw.err_counter);
	ADD(buf, *ret, bufsize, "reported firmware BUGs:%d\n",
		ar->fw.bug_counter);
	ADD(buf, *ret, bufsize, "pending restart requests:%d\n",
		atomic_read(&ar->pending_restarts));
	return buf;
}
__DEBUGFS_DECLARE_RW_FILE(bug, 400, CARL9170_STOPPED);

static const char *const erp_modes[] = {
	[CARL9170_ERP_INVALID] = "INVALID",
	[CARL9170_ERP_AUTO] = "Automatic",
	[CARL9170_ERP_MAC80211] = "Set by MAC80211",
	[CARL9170_ERP_OFF] = "Force Off",
	[CARL9170_ERP_RTS] = "Force RTS",
	[CARL9170_ERP_CTS] = "Force CTS"
};

static char *carl9170_debugfs_erp_read(struct ar9170 *ar, char *buf,
				       size_t bufsize, ssize_t *ret)
{
	ADD(buf, *ret, bufsize, "ERP Setting: (%d) -> %s\n", ar->erp_mode,
	    erp_modes[ar->erp_mode]);
	return buf;
}

static ssize_t carl9170_debugfs_erp_write(struct ar9170 *ar, const char *buf,
					  size_t count)
{
	int res, val;

	if (count < 1)
		return -EINVAL;

	res = sscanf(buf, "%d", &val);
	if (res != 1)
		return -EINVAL;

	if (!((val > CARL9170_ERP_INVALID) &&
	      (val < __CARL9170_ERP_NUM)))
		return -EINVAL;

	ar->erp_mode = val;
	return count;
}

DEBUGFS_DECLARE_RW_FILE(erp, 80);

static ssize_t carl9170_debugfs_hw_iowrite32_write(struct ar9170 *ar,
	const char *buf, size_t count)
{
	int err = 0, max_len = 22, res;
	u32 reg, val;

	if (!count)
		return 0;

	if (count > max_len)
		return -E2BIG;

	res = sscanf(buf, "0x%X 0x%X", &reg, &val);
	if (res != 2) {
		err = -EINVAL;
		goto out;
	}

	if (reg <= 0x100000 || reg >= 0x280000) {
		err = -EADDRNOTAVAIL;
		goto out;
	}

	if (reg & 3) {
		err = -EINVAL;
		goto out;
	}

	err = carl9170_write_reg(ar, reg, val);
	if (err)
		goto out;

out:
	return err ? err : count;
}
DEBUGFS_DECLARE_WO_FILE(hw_iowrite32);

DEBUGFS_HW_TALLY_FILE(hw_tx_tally, "u");
DEBUGFS_HW_TALLY_FILE(hw_rx_tally, "u");
DEBUGFS_HW_TALLY_FILE(hw_phy_errors, "u");
DEBUGFS_HW_REG_FILE(hw_wlan_queue, ".8x");
DEBUGFS_HW_REG_FILE(hw_pta_queue, ".8x");
DEBUGFS_HW_REG_FILE(hw_ampdu_info, ".8x");
DEBUGFS_QUEUE_DUMP(tx_status, 0);
DEBUGFS_QUEUE_DUMP(tx_status, 1);
DEBUGFS_QUEUE_DUMP(tx_status, 2);
DEBUGFS_QUEUE_DUMP(tx_status, 3);
DEBUGFS_QUEUE_DUMP(tx_pending, 0);
DEBUGFS_QUEUE_DUMP(tx_pending, 1);
DEBUGFS_QUEUE_DUMP(tx_pending, 2);
DEBUGFS_QUEUE_DUMP(tx_pending, 3);
DEBUGFS_READONLY_FILE(usb_tx_anch_urbs, 20, "%d",
		      atomic_read(&ar->tx_anch_urbs));
DEBUGFS_READONLY_FILE(usb_rx_anch_urbs, 20, "%d",
		      atomic_read(&ar->rx_anch_urbs));
DEBUGFS_READONLY_FILE(usb_rx_work_urbs, 20, "%d",
		      atomic_read(&ar->rx_work_urbs));
DEBUGFS_READONLY_FILE(usb_rx_pool_urbs, 20, "%d",
		      atomic_read(&ar->rx_pool_urbs));

DEBUGFS_READONLY_FILE(tx_total_queued, 20, "%d",
		      atomic_read(&ar->tx_total_queued));
DEBUGFS_READONLY_FILE(tx_ampdu_scheduler, 20, "%d",
		      atomic_read(&ar->tx_ampdu_scheduler));

DEBUGFS_READONLY_FILE(tx_total_pending, 20, "%d",
		      atomic_read(&ar->tx_total_pending));

DEBUGFS_READONLY_FILE(tx_ampdu_list_len, 20, "%d",
		      ar->tx_ampdu_list_len);

DEBUGFS_READONLY_FILE(tx_ampdu_upload, 20, "%d",
		      atomic_read(&ar->tx_ampdu_upload));

DEBUGFS_READONLY_FILE(tx_janitor_last_run, 64, "last run:%d ms ago",
	jiffies_to_msecs(jiffies - ar->tx_janitor_last_run));

DEBUGFS_READONLY_FILE(tx_dropped, 20, "%d", ar->tx_dropped);

DEBUGFS_READONLY_FILE(rx_dropped, 20, "%d", ar->rx_dropped);

DEBUGFS_READONLY_FILE(sniffer_enabled, 20, "%d", ar->sniffer_enabled);
DEBUGFS_READONLY_FILE(rx_software_decryption, 20, "%d",
		      ar->rx_software_decryption);
DEBUGFS_READONLY_FILE(ampdu_factor, 20, "%d",
		      ar->current_factor);
DEBUGFS_READONLY_FILE(ampdu_density, 20, "%d",
		      ar->current_density);

DEBUGFS_READONLY_FILE(beacon_int, 20, "%d TU", ar->global_beacon_int);
DEBUGFS_READONLY_FILE(pretbtt, 20, "%d TU", ar->global_pretbtt);

void carl9170_debugfs_register(struct ar9170 *ar)
{
	ar->debug_dir = debugfs_create_dir(KBUILD_MODNAME,
		ar->hw->wiphy->debugfsdir);

#define DEBUGFS_ADD(name)						\
	debugfs_create_file(#name, carl_debugfs_##name ##_ops.attr,	\
			    ar->debug_dir, ar,				\
			    &carl_debugfs_##name ## _ops.fops);

	DEBUGFS_ADD(usb_tx_anch_urbs);
	DEBUGFS_ADD(usb_rx_pool_urbs);
	DEBUGFS_ADD(usb_rx_anch_urbs);
	DEBUGFS_ADD(usb_rx_work_urbs);

	DEBUGFS_ADD(tx_total_queued);
	DEBUGFS_ADD(tx_total_pending);
	DEBUGFS_ADD(tx_dropped);
	DEBUGFS_ADD(tx_stuck);
	DEBUGFS_ADD(tx_ampdu_upload);
	DEBUGFS_ADD(tx_ampdu_scheduler);
	DEBUGFS_ADD(tx_ampdu_list_len);

	DEBUGFS_ADD(rx_dropped);
	DEBUGFS_ADD(sniffer_enabled);
	DEBUGFS_ADD(rx_software_decryption);

	DEBUGFS_ADD(mem_usage);
	DEBUGFS_ADD(qos_stat);
	DEBUGFS_ADD(sta_psm);
	DEBUGFS_ADD(ampdu_state);

	DEBUGFS_ADD(hw_tx_tally);
	DEBUGFS_ADD(hw_rx_tally);
	DEBUGFS_ADD(hw_phy_errors);
	DEBUGFS_ADD(phy_noise);

	DEBUGFS_ADD(hw_wlan_queue);
	DEBUGFS_ADD(hw_pta_queue);
	DEBUGFS_ADD(hw_ampdu_info);

	DEBUGFS_ADD(ampdu_density);
	DEBUGFS_ADD(ampdu_factor);

	DEBUGFS_ADD(tx_janitor_last_run);

	DEBUGFS_ADD(tx_status_0);
	DEBUGFS_ADD(tx_status_1);
	DEBUGFS_ADD(tx_status_2);
	DEBUGFS_ADD(tx_status_3);

	DEBUGFS_ADD(tx_pending_0);
	DEBUGFS_ADD(tx_pending_1);
	DEBUGFS_ADD(tx_pending_2);
	DEBUGFS_ADD(tx_pending_3);

	DEBUGFS_ADD(hw_ioread32);
	DEBUGFS_ADD(hw_iowrite32);
	DEBUGFS_ADD(bug);

	DEBUGFS_ADD(erp);

	DEBUGFS_ADD(vif_dump);

	DEBUGFS_ADD(beacon_int);
	DEBUGFS_ADD(pretbtt);

#undef DEBUGFS_ADD
}

void carl9170_debugfs_unregister(struct ar9170 *ar)
{
	debugfs_remove_recursive(ar->debug_dir);
}