1// SPDX-License-Identifier: BSD-3-Clause-Clear
2/*
3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6#include <linux/rtnetlink.h>
7#include "core.h"
8#include "debug.h"
9
10/* World regdom to be used in case default regd from fw is unavailable */
11#define ATH12K_2GHZ_CH01_11 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
12#define ATH12K_5GHZ_5150_5350 REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
13 NL80211_RRF_NO_IR)
14#define ATH12K_5GHZ_5725_5850 REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
15 NL80211_RRF_NO_IR)
16
17#define ETSI_WEATHER_RADAR_BAND_LOW 5590
18#define ETSI_WEATHER_RADAR_BAND_HIGH 5650
19#define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT 600000
20
21static const struct ieee80211_regdomain ath12k_world_regd = {
22 .n_reg_rules = 3,
23 .alpha2 = "00",
24 .reg_rules = {
25 ATH12K_2GHZ_CH01_11,
26 ATH12K_5GHZ_5150_5350,
27 ATH12K_5GHZ_5725_5850,
28 }
29};
30
31static bool ath12k_regdom_changes(struct ieee80211_hw *hw, char *alpha2)
32{
33 const struct ieee80211_regdomain *regd;
34
35 regd = rcu_dereference_rtnl(hw->wiphy->regd);
36 /* This can happen during wiphy registration where the previous
37 * user request is received before we update the regd received
38 * from firmware.
39 */
40 if (!regd)
41 return true;
42
43 return memcmp(p: regd->alpha2, q: alpha2, size: 2) != 0;
44}
45
46static void
47ath12k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
48{
49 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
50 struct ath12k_wmi_init_country_arg arg;
51 struct ath12k_hw *ah = ath12k_hw_to_ah(hw);
52 struct ath12k *ar = ath12k_ah_to_ar(ah);
53 int ret;
54
55 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
56 "Regulatory Notification received for %s\n", wiphy_name(wiphy));
57
58 /* Currently supporting only General User Hints. Cell base user
59 * hints to be handled later.
60 * Hints from other sources like Core, Beacons are not expected for
61 * self managed wiphy's
62 */
63 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
64 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
65 ath12k_warn(ab: ar->ab, fmt: "Unexpected Regulatory event for this wiphy\n");
66 return;
67 }
68
69 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
70 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
71 "Country Setting is not allowed\n");
72 return;
73 }
74
75 if (!ath12k_regdom_changes(hw, alpha2: request->alpha2)) {
76 ath12k_dbg(ar->ab, ATH12K_DBG_REG, "Country is already set\n");
77 return;
78 }
79
80 /* Set the country code to the firmware and wait for
81 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
82 * reg info
83 */
84 arg.flags = ALPHA_IS_SET;
85 memcpy(&arg.cc_info.alpha2, request->alpha2, 2);
86 arg.cc_info.alpha2[2] = 0;
87
88 ret = ath12k_wmi_send_init_country_cmd(ar, arg: &arg);
89 if (ret)
90 ath12k_warn(ab: ar->ab,
91 fmt: "INIT Country code set to fw failed : %d\n", ret);
92}
93
94int ath12k_reg_update_chan_list(struct ath12k *ar)
95{
96 struct ieee80211_supported_band **bands;
97 struct ath12k_wmi_scan_chan_list_arg *arg;
98 struct ieee80211_channel *channel;
99 struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
100 struct ath12k_wmi_channel_arg *ch;
101 enum nl80211_band band;
102 int num_channels = 0;
103 int i, ret;
104
105 bands = hw->wiphy->bands;
106 for (band = 0; band < NUM_NL80211_BANDS; band++) {
107 if (!(ar->mac.sbands[band].channels && bands[band]))
108 continue;
109
110 for (i = 0; i < bands[band]->n_channels; i++) {
111 if (bands[band]->channels[i].flags &
112 IEEE80211_CHAN_DISABLED)
113 continue;
114
115 num_channels++;
116 }
117 }
118
119 if (WARN_ON(!num_channels))
120 return -EINVAL;
121
122 arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);
123
124 if (!arg)
125 return -ENOMEM;
126
127 arg->pdev_id = ar->pdev->pdev_id;
128 arg->nallchans = num_channels;
129
130 ch = arg->channel;
131
132 for (band = 0; band < NUM_NL80211_BANDS; band++) {
133 if (!(ar->mac.sbands[band].channels && bands[band]))
134 continue;
135
136 for (i = 0; i < bands[band]->n_channels; i++) {
137 channel = &bands[band]->channels[i];
138
139 if (channel->flags & IEEE80211_CHAN_DISABLED)
140 continue;
141
142 /* TODO: Set to true/false based on some condition? */
143 ch->allow_ht = true;
144 ch->allow_vht = true;
145 ch->allow_he = true;
146
147 ch->dfs_set =
148 !!(channel->flags & IEEE80211_CHAN_RADAR);
149 ch->is_chan_passive = !!(channel->flags &
150 IEEE80211_CHAN_NO_IR);
151 ch->is_chan_passive |= ch->dfs_set;
152 ch->mhz = channel->center_freq;
153 ch->cfreq1 = channel->center_freq;
154 ch->minpower = 0;
155 ch->maxpower = channel->max_power * 2;
156 ch->maxregpower = channel->max_reg_power * 2;
157 ch->antennamax = channel->max_antenna_gain * 2;
158
159 /* TODO: Use appropriate phymodes */
160 if (channel->band == NL80211_BAND_2GHZ)
161 ch->phy_mode = MODE_11G;
162 else
163 ch->phy_mode = MODE_11A;
164
165 if (channel->band == NL80211_BAND_6GHZ &&
166 cfg80211_channel_is_psc(chan: channel))
167 ch->psc_channel = true;
168
169 ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
170 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
171 i, arg->nallchans,
172 ch->mhz, ch->maxpower, ch->maxregpower,
173 ch->antennamax, ch->phy_mode);
174
175 ch++;
176 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
177 * set_agile, reg_class_idx
178 */
179 }
180 }
181
182 ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
183 kfree(objp: arg);
184
185 return ret;
186}
187
188static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
189 struct ieee80211_regdomain *regd_copy)
190{
191 u8 i;
192
193 /* The caller should have checked error conditions */
194 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
195
196 for (i = 0; i < regd_orig->n_reg_rules; i++)
197 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
198 sizeof(struct ieee80211_reg_rule));
199}
200
201int ath12k_regd_update(struct ath12k *ar, bool init)
202{
203 struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
204 struct ieee80211_regdomain *regd, *regd_copy = NULL;
205 int ret, regd_len, pdev_id;
206 struct ath12k_base *ab;
207
208 ab = ar->ab;
209 pdev_id = ar->pdev_idx;
210
211 spin_lock_bh(lock: &ab->base_lock);
212
213 if (init) {
214 /* Apply the regd received during init through
215 * WMI_REG_CHAN_LIST_CC event. In case of failure to
216 * receive the regd, initialize with a default world
217 * regulatory.
218 */
219 if (ab->default_regd[pdev_id]) {
220 regd = ab->default_regd[pdev_id];
221 } else {
222 ath12k_warn(ab,
223 fmt: "failed to receive default regd during init\n");
224 regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
225 }
226 } else {
227 regd = ab->new_regd[pdev_id];
228 }
229
230 if (!regd) {
231 ret = -EINVAL;
232 spin_unlock_bh(lock: &ab->base_lock);
233 goto err;
234 }
235
236 regd_len = sizeof(*regd) + (regd->n_reg_rules *
237 sizeof(struct ieee80211_reg_rule));
238
239 regd_copy = kzalloc(size: regd_len, GFP_ATOMIC);
240 if (regd_copy)
241 ath12k_copy_regd(regd_orig: regd, regd_copy);
242
243 spin_unlock_bh(lock: &ab->base_lock);
244
245 if (!regd_copy) {
246 ret = -ENOMEM;
247 goto err;
248 }
249
250 rtnl_lock();
251 wiphy_lock(wiphy: hw->wiphy);
252 ret = regulatory_set_wiphy_regd_sync(wiphy: hw->wiphy, rd: regd_copy);
253 wiphy_unlock(wiphy: hw->wiphy);
254 rtnl_unlock();
255
256 kfree(objp: regd_copy);
257
258 if (ret)
259 goto err;
260
261 if (ar->state == ATH12K_STATE_ON) {
262 ret = ath12k_reg_update_chan_list(ar);
263 if (ret)
264 goto err;
265 }
266
267 return 0;
268err:
269 ath12k_warn(ab, fmt: "failed to perform regd update : %d\n", ret);
270 return ret;
271}
272
273static enum nl80211_dfs_regions
274ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
275{
276 switch (dfs_region) {
277 case ATH12K_DFS_REG_FCC:
278 case ATH12K_DFS_REG_CN:
279 return NL80211_DFS_FCC;
280 case ATH12K_DFS_REG_ETSI:
281 case ATH12K_DFS_REG_KR:
282 return NL80211_DFS_ETSI;
283 case ATH12K_DFS_REG_MKK:
284 case ATH12K_DFS_REG_MKK_N:
285 return NL80211_DFS_JP;
286 default:
287 return NL80211_DFS_UNSET;
288 }
289}
290
291static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
292{
293 u32 flags = 0;
294
295 if (reg_flags & REGULATORY_CHAN_NO_IR)
296 flags = NL80211_RRF_NO_IR;
297
298 if (reg_flags & REGULATORY_CHAN_RADAR)
299 flags |= NL80211_RRF_DFS;
300
301 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
302 flags |= NL80211_RRF_NO_OFDM;
303
304 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
305 flags |= NL80211_RRF_NO_OUTDOOR;
306
307 if (reg_flags & REGULATORY_CHAN_NO_HT40)
308 flags |= NL80211_RRF_NO_HT40;
309
310 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
311 flags |= NL80211_RRF_NO_80MHZ;
312
313 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
314 flags |= NL80211_RRF_NO_160MHZ;
315
316 return flags;
317}
318
319static u32 ath12k_map_fw_phy_flags(u32 phy_flags)
320{
321 u32 flags = 0;
322
323 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11AX)
324 flags |= NL80211_RRF_NO_HE;
325
326 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11BE)
327 flags |= NL80211_RRF_NO_EHT;
328
329 return flags;
330}
331
332static bool
333ath12k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
334 struct ieee80211_reg_rule *rule2)
335{
336 u32 start_freq1, end_freq1;
337 u32 start_freq2, end_freq2;
338
339 start_freq1 = rule1->freq_range.start_freq_khz;
340 start_freq2 = rule2->freq_range.start_freq_khz;
341
342 end_freq1 = rule1->freq_range.end_freq_khz;
343 end_freq2 = rule2->freq_range.end_freq_khz;
344
345 if ((start_freq1 >= start_freq2 &&
346 start_freq1 < end_freq2) ||
347 (start_freq2 > start_freq1 &&
348 start_freq2 < end_freq1))
349 return true;
350
351 /* TODO: Should we restrict intersection feasibility
352 * based on min bandwidth of the intersected region also,
353 * say the intersected rule should have a min bandwidth
354 * of 20MHz?
355 */
356
357 return false;
358}
359
360static void ath12k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
361 struct ieee80211_reg_rule *rule2,
362 struct ieee80211_reg_rule *new_rule)
363{
364 u32 start_freq1, end_freq1;
365 u32 start_freq2, end_freq2;
366 u32 freq_diff, max_bw;
367
368 start_freq1 = rule1->freq_range.start_freq_khz;
369 start_freq2 = rule2->freq_range.start_freq_khz;
370
371 end_freq1 = rule1->freq_range.end_freq_khz;
372 end_freq2 = rule2->freq_range.end_freq_khz;
373
374 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
375 start_freq2);
376 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
377
378 freq_diff = new_rule->freq_range.end_freq_khz -
379 new_rule->freq_range.start_freq_khz;
380 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
381 rule2->freq_range.max_bandwidth_khz);
382 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
383
384 new_rule->power_rule.max_antenna_gain =
385 min_t(u32, rule1->power_rule.max_antenna_gain,
386 rule2->power_rule.max_antenna_gain);
387
388 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
389 rule2->power_rule.max_eirp);
390
391 /* Use the flags of both the rules */
392 new_rule->flags = rule1->flags | rule2->flags;
393
394 /* To be safe, lts use the max cac timeout of both rules */
395 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
396 rule2->dfs_cac_ms);
397}
398
399static struct ieee80211_regdomain *
400ath12k_regd_intersect(struct ieee80211_regdomain *default_regd,
401 struct ieee80211_regdomain *curr_regd)
402{
403 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
404 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
405 struct ieee80211_regdomain *new_regd = NULL;
406 u8 i, j, k;
407
408 num_old_regd_rules = default_regd->n_reg_rules;
409 num_curr_regd_rules = curr_regd->n_reg_rules;
410 num_new_regd_rules = 0;
411
412 /* Find the number of intersecting rules to allocate new regd memory */
413 for (i = 0; i < num_old_regd_rules; i++) {
414 old_rule = default_regd->reg_rules + i;
415 for (j = 0; j < num_curr_regd_rules; j++) {
416 curr_rule = curr_regd->reg_rules + j;
417
418 if (ath12k_reg_can_intersect(rule1: old_rule, rule2: curr_rule))
419 num_new_regd_rules++;
420 }
421 }
422
423 if (!num_new_regd_rules)
424 return NULL;
425
426 new_regd = kzalloc(size: sizeof(*new_regd) + (num_new_regd_rules *
427 sizeof(struct ieee80211_reg_rule)),
428 GFP_ATOMIC);
429
430 if (!new_regd)
431 return NULL;
432
433 /* We set the new country and dfs region directly and only trim
434 * the freq, power, antenna gain by intersecting with the
435 * default regdomain. Also MAX of the dfs cac timeout is selected.
436 */
437 new_regd->n_reg_rules = num_new_regd_rules;
438 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
439 new_regd->dfs_region = curr_regd->dfs_region;
440 new_rule = new_regd->reg_rules;
441
442 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
443 old_rule = default_regd->reg_rules + i;
444 for (j = 0; j < num_curr_regd_rules; j++) {
445 curr_rule = curr_regd->reg_rules + j;
446
447 if (ath12k_reg_can_intersect(rule1: old_rule, rule2: curr_rule))
448 ath12k_reg_intersect_rules(rule1: old_rule, rule2: curr_rule,
449 new_rule: (new_rule + k++));
450 }
451 }
452 return new_regd;
453}
454
455static const char *
456ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
457{
458 switch (dfs_region) {
459 case NL80211_DFS_FCC:
460 return "FCC";
461 case NL80211_DFS_ETSI:
462 return "ETSI";
463 case NL80211_DFS_JP:
464 return "JP";
465 default:
466 return "UNSET";
467 }
468}
469
470static u16
471ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
472{
473 u16 bw;
474
475 bw = end_freq - start_freq;
476 bw = min_t(u16, bw, max_bw);
477
478 if (bw >= 80 && bw < 160)
479 bw = 80;
480 else if (bw >= 40 && bw < 80)
481 bw = 40;
482 else if (bw < 40)
483 bw = 20;
484
485 return bw;
486}
487
488static void
489ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
490 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
491 u32 reg_flags)
492{
493 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
494 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
495 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
496 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
497 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
498 reg_rule->flags = reg_flags;
499}
500
501static void
502ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
503 struct ieee80211_regdomain *regd,
504 struct ath12k_reg_rule *reg_rule,
505 u8 *rule_idx, u32 flags, u16 max_bw)
506{
507 u32 end_freq;
508 u16 bw;
509 u8 i;
510
511 i = *rule_idx;
512
513 bw = ath12k_reg_adjust_bw(start_freq: reg_rule->start_freq,
514 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
515
516 ath12k_reg_update_rule(reg_rule: regd->reg_rules + i, start_freq: reg_rule->start_freq,
517 ETSI_WEATHER_RADAR_BAND_LOW, bw,
518 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
519 reg_flags: flags);
520
521 ath12k_dbg(ab, ATH12K_DBG_REG,
522 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
523 i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
524 bw, reg_rule->ant_gain, reg_rule->reg_power,
525 regd->reg_rules[i].dfs_cac_ms,
526 flags);
527
528 if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
529 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
530 else
531 end_freq = reg_rule->end_freq;
532
533 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
534 max_bw);
535
536 i++;
537
538 ath12k_reg_update_rule(reg_rule: regd->reg_rules + i,
539 ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
540 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
541 reg_flags: flags);
542
543 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
544
545 ath12k_dbg(ab, ATH12K_DBG_REG,
546 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
547 i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
548 bw, reg_rule->ant_gain, reg_rule->reg_power,
549 regd->reg_rules[i].dfs_cac_ms,
550 flags);
551
552 if (end_freq == reg_rule->end_freq) {
553 regd->n_reg_rules--;
554 *rule_idx = i;
555 return;
556 }
557
558 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
559 end_freq: reg_rule->end_freq, max_bw);
560
561 i++;
562
563 ath12k_reg_update_rule(reg_rule: regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
564 end_freq: reg_rule->end_freq, bw,
565 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
566 reg_flags: flags);
567
568 ath12k_dbg(ab, ATH12K_DBG_REG,
569 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
570 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
571 bw, reg_rule->ant_gain, reg_rule->reg_power,
572 regd->reg_rules[i].dfs_cac_ms,
573 flags);
574
575 *rule_idx = i;
576}
577
578struct ieee80211_regdomain *
579ath12k_reg_build_regd(struct ath12k_base *ab,
580 struct ath12k_reg_info *reg_info, bool intersect)
581{
582 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
583 struct ath12k_reg_rule *reg_rule;
584 u8 i = 0, j = 0, k = 0;
585 u8 num_rules;
586 u16 max_bw;
587 u32 flags;
588 char alpha2[3];
589
590 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
591
592 /* FIXME: Currently taking reg rules for 6G only from Indoor AP mode list.
593 * This can be updated to choose the combination dynamically based on AP
594 * type and client type, after complete 6G regulatory support is added.
595 */
596 if (reg_info->is_ext_reg_event)
597 num_rules += reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP];
598
599 if (!num_rules)
600 goto ret;
601
602 /* Add max additional rules to accommodate weather radar band */
603 if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
604 num_rules += 2;
605
606 tmp_regd = kzalloc(size: sizeof(*tmp_regd) +
607 (num_rules * sizeof(struct ieee80211_reg_rule)),
608 GFP_ATOMIC);
609 if (!tmp_regd)
610 goto ret;
611
612 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
613 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
614 alpha2[2] = '\0';
615 tmp_regd->dfs_region = ath12k_map_fw_dfs_region(dfs_region: reg_info->dfs_region);
616
617 ath12k_dbg(ab, ATH12K_DBG_REG,
618 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
619 alpha2, ath12k_reg_get_regdom_str(tmp_regd->dfs_region),
620 reg_info->dfs_region, num_rules);
621 /* Update reg_rules[] below. Firmware is expected to
622 * send these rules in order(2G rules first and then 5G)
623 */
624 for (; i < num_rules; i++) {
625 if (reg_info->num_2g_reg_rules &&
626 (i < reg_info->num_2g_reg_rules)) {
627 reg_rule = reg_info->reg_rules_2g_ptr + i;
628 max_bw = min_t(u16, reg_rule->max_bw,
629 reg_info->max_bw_2g);
630 flags = 0;
631 } else if (reg_info->num_5g_reg_rules &&
632 (j < reg_info->num_5g_reg_rules)) {
633 reg_rule = reg_info->reg_rules_5g_ptr + j++;
634 max_bw = min_t(u16, reg_rule->max_bw,
635 reg_info->max_bw_5g);
636
637 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
638 * BW Auto correction, we can enable this by default
639 * for all 5G rules here. The regulatory core performs
640 * BW correction if required and applies flags as
641 * per other BW rule flags we pass from here
642 */
643 flags = NL80211_RRF_AUTO_BW;
644 } else if (reg_info->is_ext_reg_event &&
645 reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP] &&
646 (k < reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP])) {
647 reg_rule = reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP] + k++;
648 max_bw = min_t(u16, reg_rule->max_bw,
649 reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP]);
650 flags = NL80211_RRF_AUTO_BW;
651 } else {
652 break;
653 }
654
655 flags |= ath12k_map_fw_reg_flags(reg_flags: reg_rule->flags);
656 flags |= ath12k_map_fw_phy_flags(phy_flags: reg_info->phybitmap);
657
658 ath12k_reg_update_rule(reg_rule: tmp_regd->reg_rules + i,
659 start_freq: reg_rule->start_freq,
660 end_freq: reg_rule->end_freq, bw: max_bw,
661 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
662 reg_flags: flags);
663
664 /* Update dfs cac timeout if the dfs domain is ETSI and the
665 * new rule covers weather radar band.
666 * Default value of '0' corresponds to 60s timeout, so no
667 * need to update that for other rules.
668 */
669 if (flags & NL80211_RRF_DFS &&
670 reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
671 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
672 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
673 ath12k_reg_update_weather_radar_band(ab, regd: tmp_regd,
674 reg_rule, rule_idx: &i,
675 flags, max_bw);
676 continue;
677 }
678
679 if (reg_info->is_ext_reg_event) {
680 ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
681 i + 1, reg_rule->start_freq, reg_rule->end_freq,
682 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
683 tmp_regd->reg_rules[i].dfs_cac_ms,
684 flags, reg_rule->psd_flag, reg_rule->psd_eirp);
685 } else {
686 ath12k_dbg(ab, ATH12K_DBG_REG,
687 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
688 i + 1, reg_rule->start_freq, reg_rule->end_freq,
689 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
690 tmp_regd->reg_rules[i].dfs_cac_ms,
691 flags);
692 }
693 }
694
695 tmp_regd->n_reg_rules = i;
696
697 if (intersect) {
698 default_regd = ab->default_regd[reg_info->phy_id];
699
700 /* Get a new regd by intersecting the received regd with
701 * our default regd.
702 */
703 new_regd = ath12k_regd_intersect(default_regd, curr_regd: tmp_regd);
704 kfree(objp: tmp_regd);
705 if (!new_regd) {
706 ath12k_warn(ab, fmt: "Unable to create intersected regdomain\n");
707 goto ret;
708 }
709 } else {
710 new_regd = tmp_regd;
711 }
712
713ret:
714 return new_regd;
715}
716
717void ath12k_regd_update_work(struct work_struct *work)
718{
719 struct ath12k *ar = container_of(work, struct ath12k,
720 regd_update_work);
721 int ret;
722
723 ret = ath12k_regd_update(ar, init: false);
724 if (ret) {
725 /* Firmware has already moved to the new regd. We need
726 * to maintain channel consistency across FW, Host driver
727 * and userspace. Hence as a fallback mechanism we can set
728 * the prev or default country code to the firmware.
729 */
730 /* TODO: Implement Fallback Mechanism */
731 }
732}
733
734void ath12k_reg_init(struct ieee80211_hw *hw)
735{
736 hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
737 hw->wiphy->reg_notifier = ath12k_reg_notifier;
738}
739
740void ath12k_reg_free(struct ath12k_base *ab)
741{
742 int i;
743
744 for (i = 0; i < ab->hw_params->max_radios; i++) {
745 kfree(objp: ab->default_regd[i]);
746 kfree(objp: ab->new_regd[i]);
747 }
748}
749

source code of linux/drivers/net/wireless/ath/ath12k/reg.c