Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

  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
// SPDX-License-Identifier: ISC
/*
 * Copyright (c) 2014-2017 Qualcomm Atheros, Inc.
 * Copyright (c) 2018, The Linux Foundation. All rights reserved.
 */

#include "core.h"
#include "wmi-ops.h"
#include "txrx.h"
#include "debug.h"

static void ath10k_rx_stats_update_amsdu_subfrm(struct ath10k *ar,
						struct ath10k_sta_tid_stats *stats,
						u32 msdu_count)
{
	if (msdu_count == 1)
		stats->rx_pkt_amsdu[ATH10K_AMSDU_SUBFRM_NUM_1]++;
	else if (msdu_count == 2)
		stats->rx_pkt_amsdu[ATH10K_AMSDU_SUBFRM_NUM_2]++;
	else if (msdu_count == 3)
		stats->rx_pkt_amsdu[ATH10K_AMSDU_SUBFRM_NUM_3]++;
	else if (msdu_count == 4)
		stats->rx_pkt_amsdu[ATH10K_AMSDU_SUBFRM_NUM_4]++;
	else if (msdu_count > 4)
		stats->rx_pkt_amsdu[ATH10K_AMSDU_SUBFRM_NUM_MORE]++;
}

static void ath10k_rx_stats_update_ampdu_subfrm(struct ath10k *ar,
						struct ath10k_sta_tid_stats *stats,
						u32 mpdu_count)
{
	if (mpdu_count <= 10)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_10]++;
	else if (mpdu_count <= 20)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_20]++;
	else if (mpdu_count <= 30)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_30]++;
	else if (mpdu_count <= 40)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_40]++;
	else if (mpdu_count <= 50)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_50]++;
	else if (mpdu_count <= 60)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_60]++;
	else if (mpdu_count > 60)
		stats->rx_pkt_ampdu[ATH10K_AMPDU_SUBFRM_NUM_MORE]++;
}

void ath10k_sta_update_rx_tid_stats_ampdu(struct ath10k *ar, u16 peer_id, u8 tid,
					  struct htt_rx_indication_mpdu_range *ranges,
					  int num_ranges)
{
	struct ath10k_sta *arsta;
	struct ath10k_peer *peer;
	int i;

	if (tid > IEEE80211_NUM_TIDS || !(ar->sta_tid_stats_mask & BIT(tid)))
		return;

	rcu_read_lock();
	spin_lock_bh(&ar->data_lock);

	peer = ath10k_peer_find_by_id(ar, peer_id);
	if (!peer || !peer->sta)
		goto out;

	arsta = (struct ath10k_sta *)peer->sta->drv_priv;

	for (i = 0; i < num_ranges; i++)
		ath10k_rx_stats_update_ampdu_subfrm(ar,
						    &arsta->tid_stats[tid],
						    ranges[i].mpdu_count);

out:
	spin_unlock_bh(&ar->data_lock);
	rcu_read_unlock();
}

void ath10k_sta_update_rx_tid_stats(struct ath10k *ar, u8 *first_hdr,
				    unsigned long num_msdus,
				    enum ath10k_pkt_rx_err err,
				    unsigned long unchain_cnt,
				    unsigned long drop_cnt,
				    unsigned long drop_cnt_filter,
				    unsigned long queued_msdus)
{
	struct ieee80211_sta *sta;
	struct ath10k_sta *arsta;
	struct ieee80211_hdr *hdr;
	struct ath10k_sta_tid_stats *stats;
	u8 tid = IEEE80211_NUM_TIDS;
	bool non_data_frm = false;

	hdr = (struct ieee80211_hdr *)first_hdr;
	if (!ieee80211_is_data(hdr->frame_control))
		non_data_frm = true;

	if (ieee80211_is_data_qos(hdr->frame_control))
		tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;

	if (!(ar->sta_tid_stats_mask & BIT(tid)) || non_data_frm)
		return;

	rcu_read_lock();

	sta = ieee80211_find_sta_by_ifaddr(ar->hw, hdr->addr2, NULL);
	if (!sta)
		goto exit;

	arsta = (struct ath10k_sta *)sta->drv_priv;

	spin_lock_bh(&ar->data_lock);
	stats = &arsta->tid_stats[tid];
	stats->rx_pkt_from_fw += num_msdus;
	stats->rx_pkt_unchained += unchain_cnt;
	stats->rx_pkt_drop_chained += drop_cnt;
	stats->rx_pkt_drop_filter += drop_cnt_filter;
	if (err != ATH10K_PKT_RX_ERR_MAX)
		stats->rx_pkt_err[err] += queued_msdus;
	stats->rx_pkt_queued_for_mac += queued_msdus;
	ath10k_rx_stats_update_amsdu_subfrm(ar, &arsta->tid_stats[tid],
					    num_msdus);
	spin_unlock_bh(&ar->data_lock);

exit:
	rcu_read_unlock();
}

static void ath10k_sta_update_extd_stats_rx_duration(struct ath10k *ar,
						     struct ath10k_fw_stats *stats)
{
	struct ath10k_fw_extd_stats_peer *peer;
	struct ieee80211_sta *sta;
	struct ath10k_sta *arsta;

	rcu_read_lock();
	list_for_each_entry(peer, &stats->peers_extd, list) {
		sta = ieee80211_find_sta_by_ifaddr(ar->hw, peer->peer_macaddr,
						   NULL);
		if (!sta)
			continue;
		arsta = (struct ath10k_sta *)sta->drv_priv;
		arsta->rx_duration += (u64)peer->rx_duration;
	}
	rcu_read_unlock();
}

static void ath10k_sta_update_stats_rx_duration(struct ath10k *ar,
						struct ath10k_fw_stats *stats)
{
	struct ath10k_fw_stats_peer *peer;
	struct ieee80211_sta *sta;
	struct ath10k_sta *arsta;

	rcu_read_lock();
	list_for_each_entry(peer, &stats->peers, list) {
		sta = ieee80211_find_sta_by_ifaddr(ar->hw, peer->peer_macaddr,
						   NULL);
		if (!sta)
			continue;
		arsta = (struct ath10k_sta *)sta->drv_priv;
		arsta->rx_duration += (u64)peer->rx_duration;
	}
	rcu_read_unlock();
}

void ath10k_sta_update_rx_duration(struct ath10k *ar,
				   struct ath10k_fw_stats *stats)
{
	if (stats->extended)
		ath10k_sta_update_extd_stats_rx_duration(ar, stats);
	else
		ath10k_sta_update_stats_rx_duration(ar, stats);
}

static ssize_t ath10k_dbg_sta_read_aggr_mode(struct file *file,
					     char __user *user_buf,
					     size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	char buf[32];
	int len = 0;

	mutex_lock(&ar->conf_mutex);
	len = scnprintf(buf, sizeof(buf) - len, "aggregation mode: %s\n",
			(arsta->aggr_mode == ATH10K_DBG_AGGR_MODE_AUTO) ?
			"auto" : "manual");
	mutex_unlock(&ar->conf_mutex);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t ath10k_dbg_sta_write_aggr_mode(struct file *file,
					      const char __user *user_buf,
					      size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u32 aggr_mode;
	int ret;

	if (kstrtouint_from_user(user_buf, count, 0, &aggr_mode))
		return -EINVAL;

	if (aggr_mode >= ATH10K_DBG_AGGR_MODE_MAX)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	if ((ar->state != ATH10K_STATE_ON) ||
	    (aggr_mode == arsta->aggr_mode)) {
		ret = count;
		goto out;
	}

	ret = ath10k_wmi_addba_clear_resp(ar, arsta->arvif->vdev_id, sta->addr);
	if (ret) {
		ath10k_warn(ar, "failed to clear addba session ret: %d\n", ret);
		goto out;
	}

	arsta->aggr_mode = aggr_mode;
out:
	mutex_unlock(&ar->conf_mutex);
	return ret;
}

static const struct file_operations fops_aggr_mode = {
	.read = ath10k_dbg_sta_read_aggr_mode,
	.write = ath10k_dbg_sta_write_aggr_mode,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_write_addba(struct file *file,
					  const char __user *user_buf,
					  size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u32 tid, buf_size;
	int ret;
	char buf[64] = {0};

	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
				     user_buf, count);
	if (ret <= 0)
		return ret;

	ret = sscanf(buf, "%u %u", &tid, &buf_size);
	if (ret != 2)
		return -EINVAL;

	/* Valid TID values are 0 through 15 */
	if (tid > HTT_DATA_TX_EXT_TID_MGMT - 2)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	if ((ar->state != ATH10K_STATE_ON) ||
	    (arsta->aggr_mode != ATH10K_DBG_AGGR_MODE_MANUAL)) {
		ret = count;
		goto out;
	}

	ret = ath10k_wmi_addba_send(ar, arsta->arvif->vdev_id, sta->addr,
				    tid, buf_size);
	if (ret) {
		ath10k_warn(ar, "failed to send addba request: vdev_id %u peer %pM tid %u buf_size %u\n",
			    arsta->arvif->vdev_id, sta->addr, tid, buf_size);
	}

	ret = count;
out:
	mutex_unlock(&ar->conf_mutex);
	return ret;
}

static const struct file_operations fops_addba = {
	.write = ath10k_dbg_sta_write_addba,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_write_addba_resp(struct file *file,
					       const char __user *user_buf,
					       size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u32 tid, status;
	int ret;
	char buf[64] = {0};

	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
				     user_buf, count);
	if (ret <= 0)
		return ret;

	ret = sscanf(buf, "%u %u", &tid, &status);
	if (ret != 2)
		return -EINVAL;

	/* Valid TID values are 0 through 15 */
	if (tid > HTT_DATA_TX_EXT_TID_MGMT - 2)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	if ((ar->state != ATH10K_STATE_ON) ||
	    (arsta->aggr_mode != ATH10K_DBG_AGGR_MODE_MANUAL)) {
		ret = count;
		goto out;
	}

	ret = ath10k_wmi_addba_set_resp(ar, arsta->arvif->vdev_id, sta->addr,
					tid, status);
	if (ret) {
		ath10k_warn(ar, "failed to send addba response: vdev_id %u peer %pM tid %u status%u\n",
			    arsta->arvif->vdev_id, sta->addr, tid, status);
	}
	ret = count;
out:
	mutex_unlock(&ar->conf_mutex);
	return ret;
}

static const struct file_operations fops_addba_resp = {
	.write = ath10k_dbg_sta_write_addba_resp,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_write_delba(struct file *file,
					  const char __user *user_buf,
					  size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u32 tid, initiator, reason;
	int ret;
	char buf[64] = {0};

	ret = simple_write_to_buffer(buf, sizeof(buf) - 1, ppos,
				     user_buf, count);
	if (ret <= 0)
		return ret;

	ret = sscanf(buf, "%u %u %u", &tid, &initiator, &reason);
	if (ret != 3)
		return -EINVAL;

	/* Valid TID values are 0 through 15 */
	if (tid > HTT_DATA_TX_EXT_TID_MGMT - 2)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);
	if ((ar->state != ATH10K_STATE_ON) ||
	    (arsta->aggr_mode != ATH10K_DBG_AGGR_MODE_MANUAL)) {
		ret = count;
		goto out;
	}

	ret = ath10k_wmi_delba_send(ar, arsta->arvif->vdev_id, sta->addr,
				    tid, initiator, reason);
	if (ret) {
		ath10k_warn(ar, "failed to send delba: vdev_id %u peer %pM tid %u initiator %u reason %u\n",
			    arsta->arvif->vdev_id, sta->addr, tid, initiator,
			    reason);
	}
	ret = count;
out:
	mutex_unlock(&ar->conf_mutex);
	return ret;
}

static const struct file_operations fops_delba = {
	.write = ath10k_dbg_sta_write_delba,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_read_peer_debug_trigger(struct file *file,
						      char __user *user_buf,
						      size_t count,
						      loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	char buf[8];
	int len = 0;

	mutex_lock(&ar->conf_mutex);
	len = scnprintf(buf, sizeof(buf) - len,
			"Write 1 to once trigger the debug logs\n");
	mutex_unlock(&ar->conf_mutex);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static ssize_t
ath10k_dbg_sta_write_peer_debug_trigger(struct file *file,
					const char __user *user_buf,
					size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	u8 peer_debug_trigger;
	int ret;

	if (kstrtou8_from_user(user_buf, count, 0, &peer_debug_trigger))
		return -EINVAL;

	if (peer_debug_trigger != 1)
		return -EINVAL;

	mutex_lock(&ar->conf_mutex);

	if (ar->state != ATH10K_STATE_ON) {
		ret = -ENETDOWN;
		goto out;
	}

	ret = ath10k_wmi_peer_set_param(ar, arsta->arvif->vdev_id, sta->addr,
					WMI_PEER_DEBUG, peer_debug_trigger);
	if (ret) {
		ath10k_warn(ar, "failed to set param to trigger peer tid logs for station ret: %d\n",
			    ret);
		goto out;
	}
out:
	mutex_unlock(&ar->conf_mutex);
	return count;
}

static const struct file_operations fops_peer_debug_trigger = {
	.open = simple_open,
	.read = ath10k_dbg_sta_read_peer_debug_trigger,
	.write = ath10k_dbg_sta_write_peer_debug_trigger,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_read_peer_ps_state(struct file *file,
						 char __user *user_buf,
						 size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	char buf[20];
	int len = 0;

	spin_lock_bh(&ar->data_lock);

	len = scnprintf(buf, sizeof(buf) - len, "%d\n",
			arsta->peer_ps_state);

	spin_unlock_bh(&ar->data_lock);

	return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}

static const struct file_operations fops_peer_ps_state = {
	.open = simple_open,
	.read = ath10k_dbg_sta_read_peer_ps_state,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static char *get_err_str(enum ath10k_pkt_rx_err i)
{
	switch (i) {
	case ATH10K_PKT_RX_ERR_FCS:
		return "fcs_err";
	case ATH10K_PKT_RX_ERR_TKIP:
		return "tkip_err";
	case ATH10K_PKT_RX_ERR_CRYPT:
		return "crypt_err";
	case ATH10K_PKT_RX_ERR_PEER_IDX_INVAL:
		return "peer_idx_inval";
	case ATH10K_PKT_RX_ERR_MAX:
		return "unknown";
	}

	return "unknown";
}

static char *get_num_ampdu_subfrm_str(enum ath10k_ampdu_subfrm_num i)
{
	switch (i) {
	case ATH10K_AMPDU_SUBFRM_NUM_10:
		return "upto 10";
	case ATH10K_AMPDU_SUBFRM_NUM_20:
		return "11-20";
	case ATH10K_AMPDU_SUBFRM_NUM_30:
		return "21-30";
	case ATH10K_AMPDU_SUBFRM_NUM_40:
		return "31-40";
	case ATH10K_AMPDU_SUBFRM_NUM_50:
		return "41-50";
	case ATH10K_AMPDU_SUBFRM_NUM_60:
		return "51-60";
	case ATH10K_AMPDU_SUBFRM_NUM_MORE:
		return ">60";
	case ATH10K_AMPDU_SUBFRM_NUM_MAX:
		return "0";
	}

	return "0";
}

static char *get_num_amsdu_subfrm_str(enum ath10k_amsdu_subfrm_num i)
{
	switch (i) {
	case ATH10K_AMSDU_SUBFRM_NUM_1:
		return "1";
	case ATH10K_AMSDU_SUBFRM_NUM_2:
		return "2";
	case ATH10K_AMSDU_SUBFRM_NUM_3:
		return "3";
	case ATH10K_AMSDU_SUBFRM_NUM_4:
		return "4";
	case ATH10K_AMSDU_SUBFRM_NUM_MORE:
		return ">4";
	case ATH10K_AMSDU_SUBFRM_NUM_MAX:
		return "0";
	}

	return "0";
}

#define PRINT_TID_STATS(_field, _tabs) \
	do { \
		int k = 0; \
		for (j = 0; j <= IEEE80211_NUM_TIDS; j++) { \
			if (ar->sta_tid_stats_mask & BIT(j))  { \
				len += scnprintf(buf + len, buf_len - len, \
						 "[%02d] %-10lu  ", \
						 j, stats[j]._field); \
				k++; \
				if (k % 8 == 0)  { \
					len += scnprintf(buf + len, \
							 buf_len - len, "\n"); \
					len += scnprintf(buf + len, \
							 buf_len - len, \
							 _tabs); \
				} \
			} \
		} \
		len += scnprintf(buf + len, buf_len - len, "\n"); \
	} while (0)

static ssize_t ath10k_dbg_sta_read_tid_stats(struct file *file,
					     char __user *user_buf,
					     size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	struct ath10k_sta_tid_stats *stats = arsta->tid_stats;
	size_t len = 0, buf_len = 1048 * IEEE80211_NUM_TIDS;
	char *buf;
	int i, j;
	ssize_t ret;

	buf = kzalloc(buf_len, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	mutex_lock(&ar->conf_mutex);

	spin_lock_bh(&ar->data_lock);

	len += scnprintf(buf + len, buf_len - len,
			 "\n\t\tDriver Rx pkt stats per tid, ([tid] count)\n");
	len += scnprintf(buf + len, buf_len - len,
			 "\t\t------------------------------------------\n");
	len += scnprintf(buf + len, buf_len - len, "MSDUs from FW\t\t\t");
	PRINT_TID_STATS(rx_pkt_from_fw, "\t\t\t\t");

	len += scnprintf(buf + len, buf_len - len, "MSDUs unchained\t\t\t");
	PRINT_TID_STATS(rx_pkt_unchained, "\t\t\t\t");

	len += scnprintf(buf + len, buf_len - len,
			 "MSDUs locally dropped:chained\t");
	PRINT_TID_STATS(rx_pkt_drop_chained, "\t\t\t\t");

	len += scnprintf(buf + len, buf_len - len,
			 "MSDUs locally dropped:filtered\t");
	PRINT_TID_STATS(rx_pkt_drop_filter, "\t\t\t\t");

	len += scnprintf(buf + len, buf_len - len,
			 "MSDUs queued for mac80211\t");
	PRINT_TID_STATS(rx_pkt_queued_for_mac, "\t\t\t\t");

	for (i = 0; i < ATH10K_PKT_RX_ERR_MAX; i++) {
		len += scnprintf(buf + len, buf_len - len,
				 "MSDUs with error:%s\t", get_err_str(i));
		PRINT_TID_STATS(rx_pkt_err[i], "\t\t\t\t");
	}

	len += scnprintf(buf + len, buf_len - len, "\n");
	for (i = 0; i < ATH10K_AMPDU_SUBFRM_NUM_MAX; i++) {
		len += scnprintf(buf + len, buf_len - len,
				 "A-MPDU num subframes %s\t",
				 get_num_ampdu_subfrm_str(i));
		PRINT_TID_STATS(rx_pkt_ampdu[i], "\t\t\t\t");
	}

	len += scnprintf(buf + len, buf_len - len, "\n");
	for (i = 0; i < ATH10K_AMSDU_SUBFRM_NUM_MAX; i++) {
		len += scnprintf(buf + len, buf_len - len,
				 "A-MSDU num subframes %s\t\t",
				 get_num_amsdu_subfrm_str(i));
		PRINT_TID_STATS(rx_pkt_amsdu[i], "\t\t\t\t");
	}

	spin_unlock_bh(&ar->data_lock);

	ret = simple_read_from_buffer(user_buf, count, ppos, buf, len);

	kfree(buf);

	mutex_unlock(&ar->conf_mutex);

	return ret;
}

static const struct file_operations fops_tid_stats_dump = {
	.open = simple_open,
	.read = ath10k_dbg_sta_read_tid_stats,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

static ssize_t ath10k_dbg_sta_dump_tx_stats(struct file *file,
					    char __user *user_buf,
					    size_t count, loff_t *ppos)
{
	struct ieee80211_sta *sta = file->private_data;
	struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv;
	struct ath10k *ar = arsta->arvif->ar;
	struct ath10k_htt_data_stats *stats;
	const char *str_name[ATH10K_STATS_TYPE_MAX] = {"succ", "fail",
						       "retry", "ampdu"};
	const char *str[ATH10K_COUNTER_TYPE_MAX] = {"bytes", "packets"};
	int len = 0, i, j, k, retval = 0;
	const int size = 16 * 4096;
	char *buf;

	buf = kzalloc(size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	mutex_lock(&ar->conf_mutex);

	if (!arsta->tx_stats) {
		ath10k_warn(ar, "failed to get tx stats");
		mutex_unlock(&ar->conf_mutex);
		kfree(buf);
		return 0;
	}

	spin_lock_bh(&ar->data_lock);
	for (k = 0; k < ATH10K_STATS_TYPE_MAX; k++) {
		for (j = 0; j < ATH10K_COUNTER_TYPE_MAX; j++) {
			stats = &arsta->tx_stats->stats[k];
			len += scnprintf(buf + len, size - len, "%s_%s\n",
					 str_name[k],
					 str[j]);
			len += scnprintf(buf + len, size - len,
					 " VHT MCS %s\n",
					 str[j]);
			for (i = 0; i < ATH10K_VHT_MCS_NUM; i++)
				len += scnprintf(buf + len, size - len,
						 "  %llu ",
						 stats->vht[j][i]);
			len += scnprintf(buf + len, size - len, "\n");
			len += scnprintf(buf + len, size - len, " HT MCS %s\n",
					 str[j]);
			for (i = 0; i < ATH10K_HT_MCS_NUM; i++)
				len += scnprintf(buf + len, size - len,
						 "  %llu ", stats->ht[j][i]);
			len += scnprintf(buf + len, size - len, "\n");
			len += scnprintf(buf + len, size - len,
					" BW %s (20,5,10,40,80,160 MHz)\n", str[j]);
			len += scnprintf(buf + len, size - len,
					 "  %llu %llu %llu %llu %llu %llu\n",
					 stats->bw[j][0], stats->bw[j][1],
					 stats->bw[j][2], stats->bw[j][3],
					 stats->bw[j][4], stats->bw[j][5]);
			len += scnprintf(buf + len, size - len,
					 " NSS %s (1x1,2x2,3x3,4x4)\n", str[j]);
			len += scnprintf(buf + len, size - len,
					 "  %llu %llu %llu %llu\n",
					 stats->nss[j][0], stats->nss[j][1],
					 stats->nss[j][2], stats->nss[j][3]);
			len += scnprintf(buf + len, size - len,
					 " GI %s (LGI,SGI)\n",
					 str[j]);
			len += scnprintf(buf + len, size - len, "  %llu %llu\n",
					 stats->gi[j][0], stats->gi[j][1]);
			len += scnprintf(buf + len, size - len,
					 " legacy rate %s (1,2 ... Mbps)\n  ",
					 str[j]);
			for (i = 0; i < ATH10K_LEGACY_NUM; i++)
				len += scnprintf(buf + len, size - len, "%llu ",
						 stats->legacy[j][i]);
			len += scnprintf(buf + len, size - len, "\n");
			len += scnprintf(buf + len, size - len,
					 " Rate table %s (1,2 ... Mbps)\n  ",
					 str[j]);
			for (i = 0; i < ATH10K_RATE_TABLE_NUM; i++) {
				len += scnprintf(buf + len, size - len, "%llu ",
						 stats->rate_table[j][i]);
				if (!((i + 1) % 8))
					len +=
					scnprintf(buf + len, size - len, "\n  ");
			}
		}
	}

	len += scnprintf(buf + len, size - len,
			 "\nTX duration\n %llu usecs\n",
			 arsta->tx_stats->tx_duration);
	len += scnprintf(buf + len, size - len,
			"BA fails\n %llu\n", arsta->tx_stats->ba_fails);
	len += scnprintf(buf + len, size - len,
			"ack fails\n %llu\n", arsta->tx_stats->ack_fails);
	spin_unlock_bh(&ar->data_lock);

	if (len > size)
		len = size;
	retval = simple_read_from_buffer(user_buf, count, ppos, buf, len);
	kfree(buf);

	mutex_unlock(&ar->conf_mutex);
	return retval;
}

static const struct file_operations fops_tx_stats = {
	.read = ath10k_dbg_sta_dump_tx_stats,
	.open = simple_open,
	.owner = THIS_MODULE,
	.llseek = default_llseek,
};

void ath10k_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			    struct ieee80211_sta *sta, struct dentry *dir)
{
	struct ath10k *ar = hw->priv;

	debugfs_create_file("aggr_mode", 0644, dir, sta, &fops_aggr_mode);
	debugfs_create_file("addba", 0200, dir, sta, &fops_addba);
	debugfs_create_file("addba_resp", 0200, dir, sta, &fops_addba_resp);
	debugfs_create_file("delba", 0200, dir, sta, &fops_delba);
	debugfs_create_file("peer_debug_trigger", 0600, dir, sta,
			    &fops_peer_debug_trigger);
	debugfs_create_file("dump_tid_stats", 0400, dir, sta,
			    &fops_tid_stats_dump);

	if (ath10k_peer_stats_enabled(ar) &&
	    ath10k_debug_is_extd_tx_stats_enabled(ar))
		debugfs_create_file("tx_stats", 0400, dir, sta,
				    &fops_tx_stats);
	debugfs_create_file("peer_ps_state", 0400, dir, sta,
			    &fops_peer_ps_state);
}