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
21 static 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
ath12k_regdom_changes(struct ieee80211_hw * hw,char * alpha2)31 static 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(regd->alpha2, alpha2, 2) != 0;
44 }
45
46 static void
ath12k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)47 ath12k_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, 0);
53 int ret, i;
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(ar->ab, "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, 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 /* Allow fresh updates to wiphy regd */
89 ah->regd_updated = false;
90
91 /* Send the reg change request to all the radios */
92 for_each_ar(ah, ar, i) {
93 ret = ath12k_wmi_send_init_country_cmd(ar, &arg);
94 if (ret)
95 ath12k_warn(ar->ab,
96 "INIT Country code set to fw failed : %d\n", ret);
97 }
98 }
99
ath12k_reg_update_chan_list(struct ath12k * ar)100 int ath12k_reg_update_chan_list(struct ath12k *ar)
101 {
102 struct ieee80211_supported_band **bands;
103 struct ath12k_wmi_scan_chan_list_arg *arg;
104 struct ieee80211_channel *channel;
105 struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
106 struct ath12k_wmi_channel_arg *ch;
107 enum nl80211_band band;
108 int num_channels = 0;
109 int i, ret;
110
111 bands = hw->wiphy->bands;
112 for (band = 0; band < NUM_NL80211_BANDS; band++) {
113 if (!(ar->mac.sbands[band].channels && bands[band]))
114 continue;
115
116 for (i = 0; i < bands[band]->n_channels; i++) {
117 if (bands[band]->channels[i].flags &
118 IEEE80211_CHAN_DISABLED)
119 continue;
120
121 num_channels++;
122 }
123 }
124
125 if (WARN_ON(!num_channels))
126 return -EINVAL;
127
128 arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);
129
130 if (!arg)
131 return -ENOMEM;
132
133 arg->pdev_id = ar->pdev->pdev_id;
134 arg->nallchans = num_channels;
135
136 ch = arg->channel;
137
138 for (band = 0; band < NUM_NL80211_BANDS; band++) {
139 if (!(ar->mac.sbands[band].channels && bands[band]))
140 continue;
141
142 for (i = 0; i < bands[band]->n_channels; i++) {
143 channel = &bands[band]->channels[i];
144
145 if (channel->flags & IEEE80211_CHAN_DISABLED)
146 continue;
147
148 /* TODO: Set to true/false based on some condition? */
149 ch->allow_ht = true;
150 ch->allow_vht = true;
151 ch->allow_he = true;
152
153 ch->dfs_set =
154 !!(channel->flags & IEEE80211_CHAN_RADAR);
155 ch->is_chan_passive = !!(channel->flags &
156 IEEE80211_CHAN_NO_IR);
157 ch->is_chan_passive |= ch->dfs_set;
158 ch->mhz = channel->center_freq;
159 ch->cfreq1 = channel->center_freq;
160 ch->minpower = 0;
161 ch->maxpower = channel->max_power * 2;
162 ch->maxregpower = channel->max_reg_power * 2;
163 ch->antennamax = channel->max_antenna_gain * 2;
164
165 /* TODO: Use appropriate phymodes */
166 if (channel->band == NL80211_BAND_2GHZ)
167 ch->phy_mode = MODE_11G;
168 else
169 ch->phy_mode = MODE_11A;
170
171 if (channel->band == NL80211_BAND_6GHZ &&
172 cfg80211_channel_is_psc(channel))
173 ch->psc_channel = true;
174
175 ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
176 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
177 i, arg->nallchans,
178 ch->mhz, ch->maxpower, ch->maxregpower,
179 ch->antennamax, ch->phy_mode);
180
181 ch++;
182 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
183 * set_agile, reg_class_idx
184 */
185 }
186 }
187
188 ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
189 kfree(arg);
190
191 return ret;
192 }
193
ath12k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)194 static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
195 struct ieee80211_regdomain *regd_copy)
196 {
197 u8 i;
198
199 /* The caller should have checked error conditions */
200 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
201
202 for (i = 0; i < regd_orig->n_reg_rules; i++)
203 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
204 sizeof(struct ieee80211_reg_rule));
205 }
206
ath12k_regd_update(struct ath12k * ar,bool init)207 int ath12k_regd_update(struct ath12k *ar, bool init)
208 {
209 struct ath12k_hw *ah = ath12k_ar_to_ah(ar);
210 struct ieee80211_hw *hw = ah->hw;
211 struct ieee80211_regdomain *regd, *regd_copy = NULL;
212 int ret, regd_len, pdev_id;
213 struct ath12k_base *ab;
214 int i;
215
216 ab = ar->ab;
217
218 /* If one of the radios within ah has already updated the regd for
219 * the wiphy, then avoid setting regd again
220 */
221 if (ah->regd_updated)
222 return 0;
223
224 /* firmware provides reg rules which are similar for 2 GHz and 5 GHz
225 * pdev but 6 GHz pdev has superset of all rules including rules for
226 * all bands, we prefer 6 GHz pdev's rules to be used for setup of
227 * the wiphy regd.
228 * If 6 GHz pdev was part of the ath12k_hw, wait for the 6 GHz pdev,
229 * else pick the first pdev which calls this function and use its
230 * regd to update global hw regd.
231 * The regd_updated flag set at the end will not allow any further
232 * updates.
233 */
234 if (ah->use_6ghz_regd && !ar->supports_6ghz)
235 return 0;
236
237 pdev_id = ar->pdev_idx;
238
239 spin_lock_bh(&ab->base_lock);
240
241 if (init) {
242 /* Apply the regd received during init through
243 * WMI_REG_CHAN_LIST_CC event. In case of failure to
244 * receive the regd, initialize with a default world
245 * regulatory.
246 */
247 if (ab->default_regd[pdev_id]) {
248 regd = ab->default_regd[pdev_id];
249 } else {
250 ath12k_warn(ab,
251 "failed to receive default regd during init\n");
252 regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
253 }
254 } else {
255 regd = ab->new_regd[pdev_id];
256 }
257
258 if (!regd) {
259 ret = -EINVAL;
260 spin_unlock_bh(&ab->base_lock);
261 goto err;
262 }
263
264 regd_len = sizeof(*regd) + (regd->n_reg_rules *
265 sizeof(struct ieee80211_reg_rule));
266
267 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
268 if (regd_copy)
269 ath12k_copy_regd(regd, regd_copy);
270
271 spin_unlock_bh(&ab->base_lock);
272
273 if (!regd_copy) {
274 ret = -ENOMEM;
275 goto err;
276 }
277
278 rtnl_lock();
279 wiphy_lock(hw->wiphy);
280 ret = regulatory_set_wiphy_regd_sync(hw->wiphy, regd_copy);
281 wiphy_unlock(hw->wiphy);
282 rtnl_unlock();
283
284 kfree(regd_copy);
285
286 if (ret)
287 goto err;
288
289 if (ah->state != ATH12K_HW_STATE_ON)
290 goto skip;
291
292 ah->regd_updated = true;
293 /* Apply the new regd to all the radios, this is expected to be received only once
294 * since we check for ah->regd_updated and allow here only once.
295 */
296 for_each_ar(ah, ar, i) {
297 ab = ar->ab;
298 ret = ath12k_reg_update_chan_list(ar);
299 if (ret)
300 goto err;
301 }
302 skip:
303 return 0;
304 err:
305 ath12k_warn(ab, "failed to perform regd update : %d\n", ret);
306 return ret;
307 }
308
309 static enum nl80211_dfs_regions
ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)310 ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
311 {
312 switch (dfs_region) {
313 case ATH12K_DFS_REG_FCC:
314 case ATH12K_DFS_REG_CN:
315 return NL80211_DFS_FCC;
316 case ATH12K_DFS_REG_ETSI:
317 case ATH12K_DFS_REG_KR:
318 return NL80211_DFS_ETSI;
319 case ATH12K_DFS_REG_MKK:
320 case ATH12K_DFS_REG_MKK_N:
321 return NL80211_DFS_JP;
322 default:
323 return NL80211_DFS_UNSET;
324 }
325 }
326
ath12k_map_fw_reg_flags(u16 reg_flags)327 static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
328 {
329 u32 flags = 0;
330
331 if (reg_flags & REGULATORY_CHAN_NO_IR)
332 flags = NL80211_RRF_NO_IR;
333
334 if (reg_flags & REGULATORY_CHAN_RADAR)
335 flags |= NL80211_RRF_DFS;
336
337 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
338 flags |= NL80211_RRF_NO_OFDM;
339
340 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
341 flags |= NL80211_RRF_NO_OUTDOOR;
342
343 if (reg_flags & REGULATORY_CHAN_NO_HT40)
344 flags |= NL80211_RRF_NO_HT40;
345
346 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
347 flags |= NL80211_RRF_NO_80MHZ;
348
349 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
350 flags |= NL80211_RRF_NO_160MHZ;
351
352 return flags;
353 }
354
ath12k_map_fw_phy_flags(u32 phy_flags)355 static u32 ath12k_map_fw_phy_flags(u32 phy_flags)
356 {
357 u32 flags = 0;
358
359 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11AX)
360 flags |= NL80211_RRF_NO_HE;
361
362 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11BE)
363 flags |= NL80211_RRF_NO_EHT;
364
365 return flags;
366 }
367
368 static bool
ath12k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)369 ath12k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
370 struct ieee80211_reg_rule *rule2)
371 {
372 u32 start_freq1, end_freq1;
373 u32 start_freq2, end_freq2;
374
375 start_freq1 = rule1->freq_range.start_freq_khz;
376 start_freq2 = rule2->freq_range.start_freq_khz;
377
378 end_freq1 = rule1->freq_range.end_freq_khz;
379 end_freq2 = rule2->freq_range.end_freq_khz;
380
381 if ((start_freq1 >= start_freq2 &&
382 start_freq1 < end_freq2) ||
383 (start_freq2 > start_freq1 &&
384 start_freq2 < end_freq1))
385 return true;
386
387 /* TODO: Should we restrict intersection feasibility
388 * based on min bandwidth of the intersected region also,
389 * say the intersected rule should have a min bandwidth
390 * of 20MHz?
391 */
392
393 return false;
394 }
395
ath12k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)396 static void ath12k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
397 struct ieee80211_reg_rule *rule2,
398 struct ieee80211_reg_rule *new_rule)
399 {
400 u32 start_freq1, end_freq1;
401 u32 start_freq2, end_freq2;
402 u32 freq_diff, max_bw;
403
404 start_freq1 = rule1->freq_range.start_freq_khz;
405 start_freq2 = rule2->freq_range.start_freq_khz;
406
407 end_freq1 = rule1->freq_range.end_freq_khz;
408 end_freq2 = rule2->freq_range.end_freq_khz;
409
410 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
411 start_freq2);
412 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
413
414 freq_diff = new_rule->freq_range.end_freq_khz -
415 new_rule->freq_range.start_freq_khz;
416 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
417 rule2->freq_range.max_bandwidth_khz);
418 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
419
420 new_rule->power_rule.max_antenna_gain =
421 min_t(u32, rule1->power_rule.max_antenna_gain,
422 rule2->power_rule.max_antenna_gain);
423
424 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
425 rule2->power_rule.max_eirp);
426
427 /* Use the flags of both the rules */
428 new_rule->flags = rule1->flags | rule2->flags;
429
430 /* To be safe, lts use the max cac timeout of both rules */
431 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
432 rule2->dfs_cac_ms);
433 }
434
435 static struct ieee80211_regdomain *
ath12k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)436 ath12k_regd_intersect(struct ieee80211_regdomain *default_regd,
437 struct ieee80211_regdomain *curr_regd)
438 {
439 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
440 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
441 struct ieee80211_regdomain *new_regd = NULL;
442 u8 i, j, k;
443
444 num_old_regd_rules = default_regd->n_reg_rules;
445 num_curr_regd_rules = curr_regd->n_reg_rules;
446 num_new_regd_rules = 0;
447
448 /* Find the number of intersecting rules to allocate new regd memory */
449 for (i = 0; i < num_old_regd_rules; i++) {
450 old_rule = default_regd->reg_rules + i;
451 for (j = 0; j < num_curr_regd_rules; j++) {
452 curr_rule = curr_regd->reg_rules + j;
453
454 if (ath12k_reg_can_intersect(old_rule, curr_rule))
455 num_new_regd_rules++;
456 }
457 }
458
459 if (!num_new_regd_rules)
460 return NULL;
461
462 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
463 sizeof(struct ieee80211_reg_rule)),
464 GFP_ATOMIC);
465
466 if (!new_regd)
467 return NULL;
468
469 /* We set the new country and dfs region directly and only trim
470 * the freq, power, antenna gain by intersecting with the
471 * default regdomain. Also MAX of the dfs cac timeout is selected.
472 */
473 new_regd->n_reg_rules = num_new_regd_rules;
474 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
475 new_regd->dfs_region = curr_regd->dfs_region;
476 new_rule = new_regd->reg_rules;
477
478 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
479 old_rule = default_regd->reg_rules + i;
480 for (j = 0; j < num_curr_regd_rules; j++) {
481 curr_rule = curr_regd->reg_rules + j;
482
483 if (ath12k_reg_can_intersect(old_rule, curr_rule))
484 ath12k_reg_intersect_rules(old_rule, curr_rule,
485 (new_rule + k++));
486 }
487 }
488 return new_regd;
489 }
490
491 static const char *
ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)492 ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
493 {
494 switch (dfs_region) {
495 case NL80211_DFS_FCC:
496 return "FCC";
497 case NL80211_DFS_ETSI:
498 return "ETSI";
499 case NL80211_DFS_JP:
500 return "JP";
501 default:
502 return "UNSET";
503 }
504 }
505
506 static u16
ath12k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)507 ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
508 {
509 u16 bw;
510
511 bw = end_freq - start_freq;
512 bw = min_t(u16, bw, max_bw);
513
514 if (bw >= 80 && bw < 160)
515 bw = 80;
516 else if (bw >= 40 && bw < 80)
517 bw = 40;
518 else if (bw < 40)
519 bw = 20;
520
521 return bw;
522 }
523
524 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)525 ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
526 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
527 u32 reg_flags)
528 {
529 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
530 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
531 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
532 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
533 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
534 reg_rule->flags = reg_flags;
535 }
536
537 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)538 ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
539 struct ieee80211_regdomain *regd,
540 struct ath12k_reg_rule *reg_rule,
541 u8 *rule_idx, u32 flags, u16 max_bw)
542 {
543 u32 end_freq;
544 u16 bw;
545 u8 i;
546
547 i = *rule_idx;
548
549 bw = ath12k_reg_adjust_bw(reg_rule->start_freq,
550 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
551
552 ath12k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
553 ETSI_WEATHER_RADAR_BAND_LOW, bw,
554 reg_rule->ant_gain, reg_rule->reg_power,
555 flags);
556
557 ath12k_dbg(ab, ATH12K_DBG_REG,
558 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
559 i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
560 bw, reg_rule->ant_gain, reg_rule->reg_power,
561 regd->reg_rules[i].dfs_cac_ms,
562 flags);
563
564 if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
565 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
566 else
567 end_freq = reg_rule->end_freq;
568
569 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
570 max_bw);
571
572 i++;
573
574 ath12k_reg_update_rule(regd->reg_rules + i,
575 ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
576 reg_rule->ant_gain, reg_rule->reg_power,
577 flags);
578
579 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
580
581 ath12k_dbg(ab, ATH12K_DBG_REG,
582 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
583 i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
584 bw, reg_rule->ant_gain, reg_rule->reg_power,
585 regd->reg_rules[i].dfs_cac_ms,
586 flags);
587
588 if (end_freq == reg_rule->end_freq) {
589 regd->n_reg_rules--;
590 *rule_idx = i;
591 return;
592 }
593
594 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
595 reg_rule->end_freq, max_bw);
596
597 i++;
598
599 ath12k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
600 reg_rule->end_freq, bw,
601 reg_rule->ant_gain, reg_rule->reg_power,
602 flags);
603
604 ath12k_dbg(ab, ATH12K_DBG_REG,
605 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
606 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
607 bw, reg_rule->ant_gain, reg_rule->reg_power,
608 regd->reg_rules[i].dfs_cac_ms,
609 flags);
610
611 *rule_idx = i;
612 }
613
614 struct ieee80211_regdomain *
ath12k_reg_build_regd(struct ath12k_base * ab,struct ath12k_reg_info * reg_info,bool intersect)615 ath12k_reg_build_regd(struct ath12k_base *ab,
616 struct ath12k_reg_info *reg_info, bool intersect)
617 {
618 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
619 struct ath12k_reg_rule *reg_rule;
620 u8 i = 0, j = 0, k = 0;
621 u8 num_rules;
622 u16 max_bw;
623 u32 flags;
624 char alpha2[3];
625
626 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
627
628 /* FIXME: Currently taking reg rules for 6G only from Indoor AP mode list.
629 * This can be updated to choose the combination dynamically based on AP
630 * type and client type, after complete 6G regulatory support is added.
631 */
632 if (reg_info->is_ext_reg_event)
633 num_rules += reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP];
634
635 if (!num_rules)
636 goto ret;
637
638 /* Add max additional rules to accommodate weather radar band */
639 if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
640 num_rules += 2;
641
642 tmp_regd = kzalloc(sizeof(*tmp_regd) +
643 (num_rules * sizeof(struct ieee80211_reg_rule)),
644 GFP_ATOMIC);
645 if (!tmp_regd)
646 goto ret;
647
648 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
649 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
650 alpha2[2] = '\0';
651 tmp_regd->dfs_region = ath12k_map_fw_dfs_region(reg_info->dfs_region);
652
653 ath12k_dbg(ab, ATH12K_DBG_REG,
654 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
655 alpha2, ath12k_reg_get_regdom_str(tmp_regd->dfs_region),
656 reg_info->dfs_region, num_rules);
657 /* Update reg_rules[] below. Firmware is expected to
658 * send these rules in order(2G rules first and then 5G)
659 */
660 for (; i < num_rules; i++) {
661 if (reg_info->num_2g_reg_rules &&
662 (i < reg_info->num_2g_reg_rules)) {
663 reg_rule = reg_info->reg_rules_2g_ptr + i;
664 max_bw = min_t(u16, reg_rule->max_bw,
665 reg_info->max_bw_2g);
666 flags = 0;
667 } else if (reg_info->num_5g_reg_rules &&
668 (j < reg_info->num_5g_reg_rules)) {
669 reg_rule = reg_info->reg_rules_5g_ptr + j++;
670 max_bw = min_t(u16, reg_rule->max_bw,
671 reg_info->max_bw_5g);
672
673 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
674 * BW Auto correction, we can enable this by default
675 * for all 5G rules here. The regulatory core performs
676 * BW correction if required and applies flags as
677 * per other BW rule flags we pass from here
678 */
679 flags = NL80211_RRF_AUTO_BW;
680 } else if (reg_info->is_ext_reg_event &&
681 reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP] &&
682 (k < reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP])) {
683 reg_rule = reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP] + k++;
684 max_bw = min_t(u16, reg_rule->max_bw,
685 reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP]);
686 flags = NL80211_RRF_AUTO_BW;
687 } else {
688 break;
689 }
690
691 flags |= ath12k_map_fw_reg_flags(reg_rule->flags);
692 flags |= ath12k_map_fw_phy_flags(reg_info->phybitmap);
693
694 ath12k_reg_update_rule(tmp_regd->reg_rules + i,
695 reg_rule->start_freq,
696 reg_rule->end_freq, max_bw,
697 reg_rule->ant_gain, reg_rule->reg_power,
698 flags);
699
700 /* Update dfs cac timeout if the dfs domain is ETSI and the
701 * new rule covers weather radar band.
702 * Default value of '0' corresponds to 60s timeout, so no
703 * need to update that for other rules.
704 */
705 if (flags & NL80211_RRF_DFS &&
706 reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
707 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
708 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
709 ath12k_reg_update_weather_radar_band(ab, tmp_regd,
710 reg_rule, &i,
711 flags, max_bw);
712 continue;
713 }
714
715 if (reg_info->is_ext_reg_event) {
716 ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
717 i + 1, reg_rule->start_freq, reg_rule->end_freq,
718 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
719 tmp_regd->reg_rules[i].dfs_cac_ms,
720 flags, reg_rule->psd_flag, reg_rule->psd_eirp);
721 } else {
722 ath12k_dbg(ab, ATH12K_DBG_REG,
723 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
724 i + 1, reg_rule->start_freq, reg_rule->end_freq,
725 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
726 tmp_regd->reg_rules[i].dfs_cac_ms,
727 flags);
728 }
729 }
730
731 tmp_regd->n_reg_rules = i;
732
733 if (intersect) {
734 default_regd = ab->default_regd[reg_info->phy_id];
735
736 /* Get a new regd by intersecting the received regd with
737 * our default regd.
738 */
739 new_regd = ath12k_regd_intersect(default_regd, tmp_regd);
740 kfree(tmp_regd);
741 if (!new_regd) {
742 ath12k_warn(ab, "Unable to create intersected regdomain\n");
743 goto ret;
744 }
745 } else {
746 new_regd = tmp_regd;
747 }
748
749 ret:
750 return new_regd;
751 }
752
ath12k_regd_update_work(struct work_struct * work)753 void ath12k_regd_update_work(struct work_struct *work)
754 {
755 struct ath12k *ar = container_of(work, struct ath12k,
756 regd_update_work);
757 int ret;
758
759 ret = ath12k_regd_update(ar, false);
760 if (ret) {
761 /* Firmware has already moved to the new regd. We need
762 * to maintain channel consistency across FW, Host driver
763 * and userspace. Hence as a fallback mechanism we can set
764 * the prev or default country code to the firmware.
765 */
766 /* TODO: Implement Fallback Mechanism */
767 }
768 }
769
ath12k_reg_init(struct ieee80211_hw * hw)770 void ath12k_reg_init(struct ieee80211_hw *hw)
771 {
772 hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
773 hw->wiphy->reg_notifier = ath12k_reg_notifier;
774 }
775
ath12k_reg_free(struct ath12k_base * ab)776 void ath12k_reg_free(struct ath12k_base *ab)
777 {
778 int i;
779
780 for (i = 0; i < ab->hw_params->max_radios; i++) {
781 kfree(ab->default_regd[i]);
782 kfree(ab->new_regd[i]);
783 }
784 }
785