summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/ath/ath12k/reg.c
blob: fbf38044938c6245230e88b399352bfcc77ca7da (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
// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
 * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
 */
#include <linux/rtnetlink.h>
#include "core.h"
#include "debug.h"

/* World regdom to be used in case default regd from fw is unavailable */
#define ATH12K_2GHZ_CH01_11      REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
#define ATH12K_5GHZ_5150_5350    REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
					  NL80211_RRF_NO_IR)
#define ATH12K_5GHZ_5725_5850    REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
					  NL80211_RRF_NO_IR)

#define ETSI_WEATHER_RADAR_BAND_LOW		5590
#define ETSI_WEATHER_RADAR_BAND_HIGH		5650
#define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT	600000

static const struct ieee80211_regdomain ath12k_world_regd = {
	.n_reg_rules = 3,
	.alpha2 = "00",
	.reg_rules = {
		ATH12K_2GHZ_CH01_11,
		ATH12K_5GHZ_5150_5350,
		ATH12K_5GHZ_5725_5850,
	}
};

static bool ath12k_regdom_changes(struct ieee80211_hw *hw, char *alpha2)
{
	const struct ieee80211_regdomain *regd;

	regd = rcu_dereference_rtnl(hw->wiphy->regd);
	/* This can happen during wiphy registration where the previous
	 * user request is received before we update the regd received
	 * from firmware.
	 */
	if (!regd)
		return true;

	return memcmp(regd->alpha2, alpha2, 2) != 0;
}

static void
ath12k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
{
	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
	struct ath12k_wmi_init_country_arg arg;
	struct ath12k_hw *ah = ath12k_hw_to_ah(hw);
	struct ath12k *ar = ath12k_ah_to_ar(ah, 0);
	int ret, i;

	ath12k_dbg(ar->ab, ATH12K_DBG_REG,
		   "Regulatory Notification received for %s\n", wiphy_name(wiphy));

	/* Currently supporting only General User Hints. Cell base user
	 * hints to be handled later.
	 * Hints from other sources like Core, Beacons are not expected for
	 * self managed wiphy's
	 */
	if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
	      request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
		ath12k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
		return;
	}

	if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
		ath12k_dbg(ar->ab, ATH12K_DBG_REG,
			   "Country Setting is not allowed\n");
		return;
	}

	if (!ath12k_regdom_changes(hw, request->alpha2)) {
		ath12k_dbg(ar->ab, ATH12K_DBG_REG, "Country is already set\n");
		return;
	}

	/* Set the country code to the firmware and wait for
	 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
	 * reg info
	 */
	arg.flags = ALPHA_IS_SET;
	memcpy(&arg.cc_info.alpha2, request->alpha2, 2);
	arg.cc_info.alpha2[2] = 0;

	/* Allow fresh updates to wiphy regd */
	ah->regd_updated = false;

	/* Send the reg change request to all the radios */
	for_each_ar(ah, ar, i) {
		ret = ath12k_wmi_send_init_country_cmd(ar, &arg);
		if (ret)
			ath12k_warn(ar->ab,
				    "INIT Country code set to fw failed : %d\n", ret);
	}
}

int ath12k_reg_update_chan_list(struct ath12k *ar)
{
	struct ieee80211_supported_band **bands;
	struct ath12k_wmi_scan_chan_list_arg *arg;
	struct ieee80211_channel *channel;
	struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
	struct ath12k_wmi_channel_arg *ch;
	enum nl80211_band band;
	int num_channels = 0;
	int i, ret;

	bands = hw->wiphy->bands;
	for (band = 0; band < NUM_NL80211_BANDS; band++) {
		if (!(ar->mac.sbands[band].channels && bands[band]))
			continue;

		for (i = 0; i < bands[band]->n_channels; i++) {
			if (bands[band]->channels[i].flags &
			    IEEE80211_CHAN_DISABLED)
				continue;

			num_channels++;
		}
	}

	if (WARN_ON(!num_channels))
		return -EINVAL;

	arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);

	if (!arg)
		return -ENOMEM;

	arg->pdev_id = ar->pdev->pdev_id;
	arg->nallchans = num_channels;

	ch = arg->channel;

	for (band = 0; band < NUM_NL80211_BANDS; band++) {
		if (!(ar->mac.sbands[band].channels && bands[band]))
			continue;

		for (i = 0; i < bands[band]->n_channels; i++) {
			channel = &bands[band]->channels[i];

			if (channel->flags & IEEE80211_CHAN_DISABLED)
				continue;

			/* TODO: Set to true/false based on some condition? */
			ch->allow_ht = true;
			ch->allow_vht = true;
			ch->allow_he = true;

			ch->dfs_set =
				!!(channel->flags & IEEE80211_CHAN_RADAR);
			ch->is_chan_passive = !!(channel->flags &
						IEEE80211_CHAN_NO_IR);
			ch->is_chan_passive |= ch->dfs_set;
			ch->mhz = channel->center_freq;
			ch->cfreq1 = channel->center_freq;
			ch->minpower = 0;
			ch->maxpower = channel->max_power * 2;
			ch->maxregpower = channel->max_reg_power * 2;
			ch->antennamax = channel->max_antenna_gain * 2;

			/* TODO: Use appropriate phymodes */
			if (channel->band == NL80211_BAND_2GHZ)
				ch->phy_mode = MODE_11G;
			else
				ch->phy_mode = MODE_11A;

			if (channel->band == NL80211_BAND_6GHZ &&
			    cfg80211_channel_is_psc(channel))
				ch->psc_channel = true;

			ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
				   "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
				   i, arg->nallchans,
				   ch->mhz, ch->maxpower, ch->maxregpower,
				   ch->antennamax, ch->phy_mode);

			ch++;
			/* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
			 * set_agile, reg_class_idx
			 */
		}
	}

	ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
	kfree(arg);

	return ret;
}

static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
			     struct ieee80211_regdomain *regd_copy)
{
	u8 i;

	/* The caller should have checked error conditions */
	memcpy(regd_copy, regd_orig, sizeof(*regd_orig));

	for (i = 0; i < regd_orig->n_reg_rules; i++)
		memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
		       sizeof(struct ieee80211_reg_rule));
}

int ath12k_regd_update(struct ath12k *ar, bool init)
{
	struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
	struct ieee80211_regdomain *regd, *regd_copy = NULL;
	struct ath12k_hw *ah = ar->ah;
	int ret, regd_len, pdev_id;
	struct ath12k_base *ab;
	int i;

	ab = ar->ab;

	/* If one of the radios within ah has already updated the regd for
	 * the wiphy, then avoid setting regd again
	 */
	if (ah->regd_updated)
		return 0;

	/* firmware provides reg rules which are similar for 2 GHz and 5 GHz
	 * pdev but 6 GHz pdev has superset of all rules including rules for
	 * all bands, we prefer 6 GHz pdev's rules to be used for setup of
	 * the wiphy regd.
	 * If 6 GHz pdev was part of the ath12k_hw, wait for the 6 GHz pdev,
	 * else pick the first pdev which calls this function and use its
	 * regd to update global hw regd.
	 * The regd_updated flag set at the end will not allow any further
	 * updates.
	 */
	if (ah->use_6ghz_regd && !ar->supports_6ghz)
		return 0;

	pdev_id = ar->pdev_idx;

	spin_lock_bh(&ab->base_lock);

	if (init) {
		/* Apply the regd received during init through
		 * WMI_REG_CHAN_LIST_CC event. In case of failure to
		 * receive the regd, initialize with a default world
		 * regulatory.
		 */
		if (ab->default_regd[pdev_id]) {
			regd = ab->default_regd[pdev_id];
		} else {
			ath12k_warn(ab,
				    "failed to receive default regd during init\n");
			regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
		}
	} else {
		regd = ab->new_regd[pdev_id];
	}

	if (!regd) {
		ret = -EINVAL;
		spin_unlock_bh(&ab->base_lock);
		goto err;
	}

	regd_len = sizeof(*regd) + (regd->n_reg_rules *
		sizeof(struct ieee80211_reg_rule));

	regd_copy = kzalloc(regd_len, GFP_ATOMIC);
	if (regd_copy)
		ath12k_copy_regd(regd, regd_copy);

	spin_unlock_bh(&ab->base_lock);

	if (!regd_copy) {
		ret = -ENOMEM;
		goto err;
	}

	rtnl_lock();
	wiphy_lock(hw->wiphy);
	ret = regulatory_set_wiphy_regd_sync(hw->wiphy, regd_copy);
	wiphy_unlock(hw->wiphy);
	rtnl_unlock();

	kfree(regd_copy);

	if (ret)
		goto err;

	ah->regd_updated = true;
	/* Apply the new regd to all the radios, this is expected to be received only once
	 * since we check for ah->regd_updated and allow here only once.
	 */
	for_each_ar(ah, ar, i) {
		if (ar->state == ATH12K_STATE_ON) {
			ab = ar->ab;
			ret = ath12k_reg_update_chan_list(ar);
			if (ret)
				goto err;
		}
	}

	return 0;
err:
	ath12k_warn(ab, "failed to perform regd update : %d\n", ret);
	return ret;
}

static enum nl80211_dfs_regions
ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
{
	switch (dfs_region) {
	case ATH12K_DFS_REG_FCC:
	case ATH12K_DFS_REG_CN:
		return NL80211_DFS_FCC;
	case ATH12K_DFS_REG_ETSI:
	case ATH12K_DFS_REG_KR:
		return NL80211_DFS_ETSI;
	case ATH12K_DFS_REG_MKK:
	case ATH12K_DFS_REG_MKK_N:
		return NL80211_DFS_JP;
	default:
		return NL80211_DFS_UNSET;
	}
}

static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
{
	u32 flags = 0;

	if (reg_flags & REGULATORY_CHAN_NO_IR)
		flags = NL80211_RRF_NO_IR;

	if (reg_flags & REGULATORY_CHAN_RADAR)
		flags |= NL80211_RRF_DFS;

	if (reg_flags & REGULATORY_CHAN_NO_OFDM)
		flags |= NL80211_RRF_NO_OFDM;

	if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
		flags |= NL80211_RRF_NO_OUTDOOR;

	if (reg_flags & REGULATORY_CHAN_NO_HT40)
		flags |= NL80211_RRF_NO_HT40;

	if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
		flags |= NL80211_RRF_NO_80MHZ;

	if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
		flags |= NL80211_RRF_NO_160MHZ;

	return flags;
}

static u32 ath12k_map_fw_phy_flags(u32 phy_flags)
{
	u32 flags = 0;

	if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11AX)
		flags |= NL80211_RRF_NO_HE;

	if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11BE)
		flags |= NL80211_RRF_NO_EHT;

	return flags;
}

static bool
ath12k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
			 struct ieee80211_reg_rule *rule2)
{
	u32 start_freq1, end_freq1;
	u32 start_freq2, end_freq2;

	start_freq1 = rule1->freq_range.start_freq_khz;
	start_freq2 = rule2->freq_range.start_freq_khz;

	end_freq1 = rule1->freq_range.end_freq_khz;
	end_freq2 = rule2->freq_range.end_freq_khz;

	if ((start_freq1 >= start_freq2 &&
	     start_freq1 < end_freq2) ||
	    (start_freq2 > start_freq1 &&
	     start_freq2 < end_freq1))
		return true;

	/* TODO: Should we restrict intersection feasibility
	 *  based on min bandwidth of the intersected region also,
	 *  say the intersected rule should have a  min bandwidth
	 * of 20MHz?
	 */

	return false;
}

static void ath12k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
				       struct ieee80211_reg_rule *rule2,
				       struct ieee80211_reg_rule *new_rule)
{
	u32 start_freq1, end_freq1;
	u32 start_freq2, end_freq2;
	u32 freq_diff, max_bw;

	start_freq1 = rule1->freq_range.start_freq_khz;
	start_freq2 = rule2->freq_range.start_freq_khz;

	end_freq1 = rule1->freq_range.end_freq_khz;
	end_freq2 = rule2->freq_range.end_freq_khz;

	new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
						    start_freq2);
	new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);

	freq_diff = new_rule->freq_range.end_freq_khz -
			new_rule->freq_range.start_freq_khz;
	max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
		       rule2->freq_range.max_bandwidth_khz);
	new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);

	new_rule->power_rule.max_antenna_gain =
		min_t(u32, rule1->power_rule.max_antenna_gain,
		      rule2->power_rule.max_antenna_gain);

	new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
					      rule2->power_rule.max_eirp);

	/* Use the flags of both the rules */
	new_rule->flags = rule1->flags | rule2->flags;

	/* To be safe, lts use the max cac timeout of both rules */
	new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
				     rule2->dfs_cac_ms);
}

static struct ieee80211_regdomain *
ath12k_regd_intersect(struct ieee80211_regdomain *default_regd,
		      struct ieee80211_regdomain *curr_regd)
{
	u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
	struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
	struct ieee80211_regdomain *new_regd = NULL;
	u8 i, j, k;

	num_old_regd_rules = default_regd->n_reg_rules;
	num_curr_regd_rules = curr_regd->n_reg_rules;
	num_new_regd_rules = 0;

	/* Find the number of intersecting rules to allocate new regd memory */
	for (i = 0; i < num_old_regd_rules; i++) {
		old_rule = default_regd->reg_rules + i;
		for (j = 0; j < num_curr_regd_rules; j++) {
			curr_rule = curr_regd->reg_rules + j;

			if (ath12k_reg_can_intersect(old_rule, curr_rule))
				num_new_regd_rules++;
		}
	}

	if (!num_new_regd_rules)
		return NULL;

	new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
			sizeof(struct ieee80211_reg_rule)),
			GFP_ATOMIC);

	if (!new_regd)
		return NULL;

	/* We set the new country and dfs region directly and only trim
	 * the freq, power, antenna gain by intersecting with the
	 * default regdomain. Also MAX of the dfs cac timeout is selected.
	 */
	new_regd->n_reg_rules = num_new_regd_rules;
	memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
	new_regd->dfs_region = curr_regd->dfs_region;
	new_rule = new_regd->reg_rules;

	for (i = 0, k = 0; i < num_old_regd_rules; i++) {
		old_rule = default_regd->reg_rules + i;
		for (j = 0; j < num_curr_regd_rules; j++) {
			curr_rule = curr_regd->reg_rules + j;

			if (ath12k_reg_can_intersect(old_rule, curr_rule))
				ath12k_reg_intersect_rules(old_rule, curr_rule,
							   (new_rule + k++));
		}
	}
	return new_regd;
}

static const char *
ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
{
	switch (dfs_region) {
	case NL80211_DFS_FCC:
		return "FCC";
	case NL80211_DFS_ETSI:
		return "ETSI";
	case NL80211_DFS_JP:
		return "JP";
	default:
		return "UNSET";
	}
}

static u16
ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
{
	u16 bw;

	bw = end_freq - start_freq;
	bw = min_t(u16, bw, max_bw);

	if (bw >= 80 && bw < 160)
		bw = 80;
	else if (bw >= 40 && bw < 80)
		bw = 40;
	else if (bw < 40)
		bw = 20;

	return bw;
}

static void
ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
		       u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
		       u32 reg_flags)
{
	reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
	reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
	reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
	reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
	reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
	reg_rule->flags = reg_flags;
}

static void
ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
				     struct ieee80211_regdomain *regd,
				     struct ath12k_reg_rule *reg_rule,
				     u8 *rule_idx, u32 flags, u16 max_bw)
{
	u32 end_freq;
	u16 bw;
	u8 i;

	i = *rule_idx;

	bw = ath12k_reg_adjust_bw(reg_rule->start_freq,
				  ETSI_WEATHER_RADAR_BAND_LOW, max_bw);

	ath12k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
			       ETSI_WEATHER_RADAR_BAND_LOW, bw,
			       reg_rule->ant_gain, reg_rule->reg_power,
			       flags);

	ath12k_dbg(ab, ATH12K_DBG_REG,
		   "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
		   i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
		   bw, reg_rule->ant_gain, reg_rule->reg_power,
		   regd->reg_rules[i].dfs_cac_ms,
		   flags);

	if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
		end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
	else
		end_freq = reg_rule->end_freq;

	bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
				  max_bw);

	i++;

	ath12k_reg_update_rule(regd->reg_rules + i,
			       ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
			       reg_rule->ant_gain, reg_rule->reg_power,
			       flags);

	regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;

	ath12k_dbg(ab, ATH12K_DBG_REG,
		   "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
		   i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
		   bw, reg_rule->ant_gain, reg_rule->reg_power,
		   regd->reg_rules[i].dfs_cac_ms,
		   flags);

	if (end_freq == reg_rule->end_freq) {
		regd->n_reg_rules--;
		*rule_idx = i;
		return;
	}

	bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
				  reg_rule->end_freq, max_bw);

	i++;

	ath12k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
			       reg_rule->end_freq, bw,
			       reg_rule->ant_gain, reg_rule->reg_power,
			       flags);

	ath12k_dbg(ab, ATH12K_DBG_REG,
		   "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
		   i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
		   bw, reg_rule->ant_gain, reg_rule->reg_power,
		   regd->reg_rules[i].dfs_cac_ms,
		   flags);

	*rule_idx = i;
}

struct ieee80211_regdomain *
ath12k_reg_build_regd(struct ath12k_base *ab,
		      struct ath12k_reg_info *reg_info, bool intersect)
{
	struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
	struct ath12k_reg_rule *reg_rule;
	u8 i = 0, j = 0, k = 0;
	u8 num_rules;
	u16 max_bw;
	u32 flags;
	char alpha2[3];

	num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;

	/* FIXME: Currently taking reg rules for 6G only from Indoor AP mode list.
	 * This can be updated to choose the combination dynamically based on AP
	 * type and client type, after complete 6G regulatory support is added.
	 */
	if (reg_info->is_ext_reg_event)
		num_rules += reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP];

	if (!num_rules)
		goto ret;

	/* Add max additional rules to accommodate weather radar band */
	if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
		num_rules += 2;

	tmp_regd = kzalloc(sizeof(*tmp_regd) +
			   (num_rules * sizeof(struct ieee80211_reg_rule)),
			   GFP_ATOMIC);
	if (!tmp_regd)
		goto ret;

	memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
	memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
	alpha2[2] = '\0';
	tmp_regd->dfs_region = ath12k_map_fw_dfs_region(reg_info->dfs_region);

	ath12k_dbg(ab, ATH12K_DBG_REG,
		   "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
		   alpha2, ath12k_reg_get_regdom_str(tmp_regd->dfs_region),
		   reg_info->dfs_region, num_rules);
	/* Update reg_rules[] below. Firmware is expected to
	 * send these rules in order(2G rules first and then 5G)
	 */
	for (; i < num_rules; i++) {
		if (reg_info->num_2g_reg_rules &&
		    (i < reg_info->num_2g_reg_rules)) {
			reg_rule = reg_info->reg_rules_2g_ptr + i;
			max_bw = min_t(u16, reg_rule->max_bw,
				       reg_info->max_bw_2g);
			flags = 0;
		} else if (reg_info->num_5g_reg_rules &&
			   (j < reg_info->num_5g_reg_rules)) {
			reg_rule = reg_info->reg_rules_5g_ptr + j++;
			max_bw = min_t(u16, reg_rule->max_bw,
				       reg_info->max_bw_5g);

			/* FW doesn't pass NL80211_RRF_AUTO_BW flag for
			 * BW Auto correction, we can enable this by default
			 * for all 5G rules here. The regulatory core performs
			 * BW correction if required and applies flags as
			 * per other BW rule flags we pass from here
			 */
			flags = NL80211_RRF_AUTO_BW;
		} else if (reg_info->is_ext_reg_event &&
			   reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP] &&
			(k < reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP])) {
			reg_rule = reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP] + k++;
			max_bw = min_t(u16, reg_rule->max_bw,
				       reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP]);
			flags = NL80211_RRF_AUTO_BW;
		} else {
			break;
		}

		flags |= ath12k_map_fw_reg_flags(reg_rule->flags);
		flags |= ath12k_map_fw_phy_flags(reg_info->phybitmap);

		ath12k_reg_update_rule(tmp_regd->reg_rules + i,
				       reg_rule->start_freq,
				       reg_rule->end_freq, max_bw,
				       reg_rule->ant_gain, reg_rule->reg_power,
				       flags);

		/* Update dfs cac timeout if the dfs domain is ETSI and the
		 * new rule covers weather radar band.
		 * Default value of '0' corresponds to 60s timeout, so no
		 * need to update that for other rules.
		 */
		if (flags & NL80211_RRF_DFS &&
		    reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
		    (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
		    reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
			ath12k_reg_update_weather_radar_band(ab, tmp_regd,
							     reg_rule, &i,
							     flags, max_bw);
			continue;
		}

		if (reg_info->is_ext_reg_event) {
			ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
				   i + 1, reg_rule->start_freq, reg_rule->end_freq,
				   max_bw, reg_rule->ant_gain, reg_rule->reg_power,
				   tmp_regd->reg_rules[i].dfs_cac_ms,
				   flags, reg_rule->psd_flag, reg_rule->psd_eirp);
		} else {
			ath12k_dbg(ab, ATH12K_DBG_REG,
				   "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
				   i + 1, reg_rule->start_freq, reg_rule->end_freq,
				   max_bw, reg_rule->ant_gain, reg_rule->reg_power,
				   tmp_regd->reg_rules[i].dfs_cac_ms,
				   flags);
		}
	}

	tmp_regd->n_reg_rules = i;

	if (intersect) {
		default_regd = ab->default_regd[reg_info->phy_id];

		/* Get a new regd by intersecting the received regd with
		 * our default regd.
		 */
		new_regd = ath12k_regd_intersect(default_regd, tmp_regd);
		kfree(tmp_regd);
		if (!new_regd) {
			ath12k_warn(ab, "Unable to create intersected regdomain\n");
			goto ret;
		}
	} else {
		new_regd = tmp_regd;
	}

ret:
	return new_regd;
}

void ath12k_regd_update_work(struct work_struct *work)
{
	struct ath12k *ar = container_of(work, struct ath12k,
					 regd_update_work);
	int ret;

	ret = ath12k_regd_update(ar, false);
	if (ret) {
		/* Firmware has already moved to the new regd. We need
		 * to maintain channel consistency across FW, Host driver
		 * and userspace. Hence as a fallback mechanism we can set
		 * the prev or default country code to the firmware.
		 */
		/* TODO: Implement Fallback Mechanism */
	}
}

void ath12k_reg_init(struct ieee80211_hw *hw)
{
	hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
	hw->wiphy->reg_notifier = ath12k_reg_notifier;
}

void ath12k_reg_free(struct ath12k_base *ab)
{
	int i;

	for (i = 0; i < ab->hw_params->max_radios; i++) {
		kfree(ab->default_regd[i]);
		kfree(ab->new_regd[i]);
	}
}