1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5 #include "core.h"
6 #include "debug.h"
7
8 /* World regdom to be used in case default regd from fw is unavailable */
9 #define ATH11K_2GHZ_CH01_11 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
10 #define ATH11K_5GHZ_5150_5350 REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
11 NL80211_RRF_NO_IR)
12 #define ATH11K_5GHZ_5725_5850 REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
13 NL80211_RRF_NO_IR)
14
15 #define ETSI_WEATHER_RADAR_BAND_LOW 5590
16 #define ETSI_WEATHER_RADAR_BAND_HIGH 5650
17 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT 600000
18
19 static const struct ieee80211_regdomain ath11k_world_regd = {
20 .n_reg_rules = 3,
21 .alpha2 = "00",
22 .reg_rules = {
23 ATH11K_2GHZ_CH01_11,
24 ATH11K_5GHZ_5150_5350,
25 ATH11K_5GHZ_5725_5850,
26 }
27 };
28
ath11k_regdom_changes(struct ath11k * ar,char * alpha2)29 static bool ath11k_regdom_changes(struct ath11k *ar, char *alpha2)
30 {
31 const struct ieee80211_regdomain *regd;
32
33 regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
34 /* This can happen during wiphy registration where the previous
35 * user request is received before we update the regd received
36 * from firmware.
37 */
38 if (!regd)
39 return true;
40
41 return memcmp(regd->alpha2, alpha2, 2) != 0;
42 }
43
44 static void
ath11k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)45 ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
46 {
47 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
48 struct wmi_init_country_params init_country_param;
49 struct ath11k *ar = hw->priv;
50 int ret;
51
52 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
53 "Regulatory Notification received for %s\n", wiphy_name(wiphy));
54
55 /* Currently supporting only General User Hints. Cell base user
56 * hints to be handled later.
57 * Hints from other sources like Core, Beacons are not expected for
58 * self managed wiphy's
59 */
60 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
61 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
62 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
63 return;
64 }
65
66 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
67 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
68 "Country Setting is not allowed\n");
69 return;
70 }
71
72 if (!ath11k_regdom_changes(ar, request->alpha2)) {
73 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
74 return;
75 }
76
77 /* Set the country code to the firmware and wait for
78 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
79 * reg info
80 */
81 init_country_param.flags = ALPHA_IS_SET;
82 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
83 init_country_param.cc_info.alpha2[2] = 0;
84
85 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
86 if (ret)
87 ath11k_warn(ar->ab,
88 "INIT Country code set to fw failed : %d\n", ret);
89 }
90
ath11k_reg_update_chan_list(struct ath11k * ar)91 int ath11k_reg_update_chan_list(struct ath11k *ar)
92 {
93 struct ieee80211_supported_band **bands;
94 struct scan_chan_list_params *params;
95 struct ieee80211_channel *channel;
96 struct ieee80211_hw *hw = ar->hw;
97 struct channel_param *ch;
98 enum nl80211_band band;
99 int num_channels = 0;
100 int params_len;
101 int i, ret;
102
103 bands = hw->wiphy->bands;
104 for (band = 0; band < NUM_NL80211_BANDS; band++) {
105 if (!bands[band])
106 continue;
107
108 for (i = 0; i < bands[band]->n_channels; i++) {
109 if (bands[band]->channels[i].flags &
110 IEEE80211_CHAN_DISABLED)
111 continue;
112
113 num_channels++;
114 }
115 }
116
117 if (WARN_ON(!num_channels))
118 return -EINVAL;
119
120 params_len = sizeof(struct scan_chan_list_params) +
121 num_channels * sizeof(struct channel_param);
122 params = kzalloc(params_len, GFP_KERNEL);
123
124 if (!params)
125 return -ENOMEM;
126
127 params->pdev_id = ar->pdev->pdev_id;
128 params->nallchans = num_channels;
129
130 ch = params->ch_param;
131
132 for (band = 0; band < NUM_NL80211_BANDS; band++) {
133 if (!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(channel))
167 ch->psc_channel = true;
168
169 ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
170 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
171 i, params->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 = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
183 kfree(params);
184
185 return ret;
186 }
187
ath11k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)188 static void ath11k_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(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
198 sizeof(struct ieee80211_reg_rule));
199 }
200
ath11k_regd_update(struct ath11k * ar,bool init)201 int ath11k_regd_update(struct ath11k *ar, bool init)
202 {
203 struct ieee80211_regdomain *regd, *regd_copy = NULL;
204 int ret, regd_len, pdev_id;
205 struct ath11k_base *ab;
206
207 ab = ar->ab;
208 pdev_id = ar->pdev_idx;
209
210 spin_lock_bh(&ab->base_lock);
211
212 if (init) {
213 /* Apply the regd received during init through
214 * WMI_REG_CHAN_LIST_CC event. In case of failure to
215 * receive the regd, initialize with a default world
216 * regulatory.
217 */
218 if (ab->default_regd[pdev_id]) {
219 regd = ab->default_regd[pdev_id];
220 } else {
221 ath11k_warn(ab,
222 "failed to receive default regd during init\n");
223 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
224 }
225 } else {
226 regd = ab->new_regd[pdev_id];
227 }
228
229 if (!regd) {
230 ret = -EINVAL;
231 spin_unlock_bh(&ab->base_lock);
232 goto err;
233 }
234
235 regd_len = sizeof(*regd) + (regd->n_reg_rules *
236 sizeof(struct ieee80211_reg_rule));
237
238 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
239 if (regd_copy)
240 ath11k_copy_regd(regd, regd_copy);
241
242 spin_unlock_bh(&ab->base_lock);
243
244 if (!regd_copy) {
245 ret = -ENOMEM;
246 goto err;
247 }
248
249 rtnl_lock();
250 wiphy_lock(ar->hw->wiphy);
251 ret = regulatory_set_wiphy_regd_sync(ar->hw->wiphy, regd_copy);
252 wiphy_unlock(ar->hw->wiphy);
253 rtnl_unlock();
254
255 kfree(regd_copy);
256
257 if (ret)
258 goto err;
259
260 if (ar->state == ATH11K_STATE_ON) {
261 ret = ath11k_reg_update_chan_list(ar);
262 if (ret)
263 goto err;
264 }
265
266 return 0;
267 err:
268 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
269 return ret;
270 }
271
272 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)273 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
274 {
275 switch (dfs_region) {
276 case ATH11K_DFS_REG_FCC:
277 case ATH11K_DFS_REG_CN:
278 return NL80211_DFS_FCC;
279 case ATH11K_DFS_REG_ETSI:
280 case ATH11K_DFS_REG_KR:
281 return NL80211_DFS_ETSI;
282 case ATH11K_DFS_REG_MKK:
283 case ATH11K_DFS_REG_MKK_N:
284 return NL80211_DFS_JP;
285 default:
286 return NL80211_DFS_UNSET;
287 }
288 }
289
ath11k_map_fw_reg_flags(u16 reg_flags)290 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
291 {
292 u32 flags = 0;
293
294 if (reg_flags & REGULATORY_CHAN_NO_IR)
295 flags = NL80211_RRF_NO_IR;
296
297 if (reg_flags & REGULATORY_CHAN_RADAR)
298 flags |= NL80211_RRF_DFS;
299
300 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
301 flags |= NL80211_RRF_NO_OFDM;
302
303 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
304 flags |= NL80211_RRF_NO_OUTDOOR;
305
306 if (reg_flags & REGULATORY_CHAN_NO_HT40)
307 flags |= NL80211_RRF_NO_HT40;
308
309 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
310 flags |= NL80211_RRF_NO_80MHZ;
311
312 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
313 flags |= NL80211_RRF_NO_160MHZ;
314
315 return flags;
316 }
317
318 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)319 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
320 struct ieee80211_reg_rule *rule2)
321 {
322 u32 start_freq1, end_freq1;
323 u32 start_freq2, end_freq2;
324
325 start_freq1 = rule1->freq_range.start_freq_khz;
326 start_freq2 = rule2->freq_range.start_freq_khz;
327
328 end_freq1 = rule1->freq_range.end_freq_khz;
329 end_freq2 = rule2->freq_range.end_freq_khz;
330
331 if ((start_freq1 >= start_freq2 &&
332 start_freq1 < end_freq2) ||
333 (start_freq2 > start_freq1 &&
334 start_freq2 < end_freq1))
335 return true;
336
337 /* TODO: Should we restrict intersection feasibility
338 * based on min bandwidth of the intersected region also,
339 * say the intersected rule should have a min bandwidth
340 * of 20MHz?
341 */
342
343 return false;
344 }
345
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)346 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
347 struct ieee80211_reg_rule *rule2,
348 struct ieee80211_reg_rule *new_rule)
349 {
350 u32 start_freq1, end_freq1;
351 u32 start_freq2, end_freq2;
352 u32 freq_diff, max_bw;
353
354 start_freq1 = rule1->freq_range.start_freq_khz;
355 start_freq2 = rule2->freq_range.start_freq_khz;
356
357 end_freq1 = rule1->freq_range.end_freq_khz;
358 end_freq2 = rule2->freq_range.end_freq_khz;
359
360 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
361 start_freq2);
362 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
363
364 freq_diff = new_rule->freq_range.end_freq_khz -
365 new_rule->freq_range.start_freq_khz;
366 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
367 rule2->freq_range.max_bandwidth_khz);
368 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
369
370 new_rule->power_rule.max_antenna_gain =
371 min_t(u32, rule1->power_rule.max_antenna_gain,
372 rule2->power_rule.max_antenna_gain);
373
374 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
375 rule2->power_rule.max_eirp);
376
377 /* Use the flags of both the rules */
378 new_rule->flags = rule1->flags | rule2->flags;
379
380 /* To be safe, lts use the max cac timeout of both rules */
381 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
382 rule2->dfs_cac_ms);
383 }
384
385 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)386 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
387 struct ieee80211_regdomain *curr_regd)
388 {
389 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
390 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
391 struct ieee80211_regdomain *new_regd = NULL;
392 u8 i, j, k;
393
394 num_old_regd_rules = default_regd->n_reg_rules;
395 num_curr_regd_rules = curr_regd->n_reg_rules;
396 num_new_regd_rules = 0;
397
398 /* Find the number of intersecting rules to allocate new regd memory */
399 for (i = 0; i < num_old_regd_rules; i++) {
400 old_rule = default_regd->reg_rules + i;
401 for (j = 0; j < num_curr_regd_rules; j++) {
402 curr_rule = curr_regd->reg_rules + j;
403
404 if (ath11k_reg_can_intersect(old_rule, curr_rule))
405 num_new_regd_rules++;
406 }
407 }
408
409 if (!num_new_regd_rules)
410 return NULL;
411
412 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
413 sizeof(struct ieee80211_reg_rule)),
414 GFP_ATOMIC);
415
416 if (!new_regd)
417 return NULL;
418
419 /* We set the new country and dfs region directly and only trim
420 * the freq, power, antenna gain by intersecting with the
421 * default regdomain. Also MAX of the dfs cac timeout is selected.
422 */
423 new_regd->n_reg_rules = num_new_regd_rules;
424 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
425 new_regd->dfs_region = curr_regd->dfs_region;
426 new_rule = new_regd->reg_rules;
427
428 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
429 old_rule = default_regd->reg_rules + i;
430 for (j = 0; j < num_curr_regd_rules; j++) {
431 curr_rule = curr_regd->reg_rules + j;
432
433 if (ath11k_reg_can_intersect(old_rule, curr_rule))
434 ath11k_reg_intersect_rules(old_rule, curr_rule,
435 (new_rule + k++));
436 }
437 }
438 return new_regd;
439 }
440
441 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)442 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
443 {
444 switch (dfs_region) {
445 case NL80211_DFS_FCC:
446 return "FCC";
447 case NL80211_DFS_ETSI:
448 return "ETSI";
449 case NL80211_DFS_JP:
450 return "JP";
451 default:
452 return "UNSET";
453 }
454 }
455
456 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)457 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
458 {
459 u16 bw;
460
461 bw = end_freq - start_freq;
462 bw = min_t(u16, bw, max_bw);
463
464 if (bw >= 80 && bw < 160)
465 bw = 80;
466 else if (bw >= 40 && bw < 80)
467 bw = 40;
468 else if (bw < 40)
469 bw = 20;
470
471 return bw;
472 }
473
474 static void
ath11k_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)475 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
476 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
477 u32 reg_flags)
478 {
479 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
480 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
481 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
482 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
483 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
484 reg_rule->flags = reg_flags;
485 }
486
487 static void
ath11k_reg_update_weather_radar_band(struct ath11k_base * ab,struct ieee80211_regdomain * regd,struct cur_reg_rule * reg_rule,u8 * rule_idx,u32 flags,u16 max_bw)488 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
489 struct ieee80211_regdomain *regd,
490 struct cur_reg_rule *reg_rule,
491 u8 *rule_idx, u32 flags, u16 max_bw)
492 {
493 u32 end_freq;
494 u16 bw;
495 u8 i;
496
497 i = *rule_idx;
498
499 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
500 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
501
502 ath11k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
503 ETSI_WEATHER_RADAR_BAND_LOW, bw,
504 reg_rule->ant_gain, reg_rule->reg_power,
505 flags);
506
507 ath11k_dbg(ab, ATH11K_DBG_REG,
508 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
509 i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
510 bw, reg_rule->ant_gain, reg_rule->reg_power,
511 regd->reg_rules[i].dfs_cac_ms,
512 flags);
513
514 if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
515 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
516 else
517 end_freq = reg_rule->end_freq;
518
519 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
520 max_bw);
521
522 i++;
523
524 ath11k_reg_update_rule(regd->reg_rules + i,
525 ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
526 reg_rule->ant_gain, reg_rule->reg_power,
527 flags);
528
529 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
530
531 ath11k_dbg(ab, ATH11K_DBG_REG,
532 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
533 i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
534 bw, reg_rule->ant_gain, reg_rule->reg_power,
535 regd->reg_rules[i].dfs_cac_ms,
536 flags);
537
538 if (end_freq == reg_rule->end_freq) {
539 regd->n_reg_rules--;
540 *rule_idx = i;
541 return;
542 }
543
544 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
545 reg_rule->end_freq, max_bw);
546
547 i++;
548
549 ath11k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
550 reg_rule->end_freq, bw,
551 reg_rule->ant_gain, reg_rule->reg_power,
552 flags);
553
554 ath11k_dbg(ab, ATH11K_DBG_REG,
555 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
556 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
557 bw, reg_rule->ant_gain, reg_rule->reg_power,
558 regd->reg_rules[i].dfs_cac_ms,
559 flags);
560
561 *rule_idx = i;
562 }
563
564 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)565 ath11k_reg_build_regd(struct ath11k_base *ab,
566 struct cur_regulatory_info *reg_info, bool intersect)
567 {
568 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
569 struct cur_reg_rule *reg_rule;
570 u8 i = 0, j = 0;
571 u8 num_rules;
572 u16 max_bw;
573 u32 flags;
574 char alpha2[3];
575
576 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
577
578 if (!num_rules)
579 goto ret;
580
581 /* Add max additional rules to accommodate weather radar band */
582 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
583 num_rules += 2;
584
585 tmp_regd = kzalloc(sizeof(*tmp_regd) +
586 (num_rules * sizeof(struct ieee80211_reg_rule)),
587 GFP_ATOMIC);
588 if (!tmp_regd)
589 goto ret;
590
591 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
592 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
593 alpha2[2] = '\0';
594 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
595
596 ath11k_dbg(ab, ATH11K_DBG_REG,
597 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
598 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
599 reg_info->dfs_region, num_rules);
600 /* Update reg_rules[] below. Firmware is expected to
601 * send these rules in order(2G rules first and then 5G)
602 */
603 for (; i < num_rules; i++) {
604 if (reg_info->num_2g_reg_rules &&
605 (i < reg_info->num_2g_reg_rules)) {
606 reg_rule = reg_info->reg_rules_2g_ptr + i;
607 max_bw = min_t(u16, reg_rule->max_bw,
608 reg_info->max_bw_2g);
609 flags = 0;
610 } else if (reg_info->num_5g_reg_rules &&
611 (j < reg_info->num_5g_reg_rules)) {
612 reg_rule = reg_info->reg_rules_5g_ptr + j++;
613 max_bw = min_t(u16, reg_rule->max_bw,
614 reg_info->max_bw_5g);
615
616 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
617 * BW Auto correction, we can enable this by default
618 * for all 5G rules here. The regulatory core performs
619 * BW correction if required and applies flags as
620 * per other BW rule flags we pass from here
621 */
622 flags = NL80211_RRF_AUTO_BW;
623 } else {
624 break;
625 }
626
627 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
628
629 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
630 reg_rule->start_freq,
631 reg_rule->end_freq, max_bw,
632 reg_rule->ant_gain, reg_rule->reg_power,
633 flags);
634
635 /* Update dfs cac timeout if the dfs domain is ETSI and the
636 * new rule covers weather radar band.
637 * Default value of '0' corresponds to 60s timeout, so no
638 * need to update that for other rules.
639 */
640 if (flags & NL80211_RRF_DFS &&
641 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
642 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
643 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
644 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
645 reg_rule, &i,
646 flags, max_bw);
647 continue;
648 }
649
650 ath11k_dbg(ab, ATH11K_DBG_REG,
651 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
652 i + 1, reg_rule->start_freq, reg_rule->end_freq,
653 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
654 tmp_regd->reg_rules[i].dfs_cac_ms,
655 flags);
656 }
657
658 tmp_regd->n_reg_rules = i;
659
660 if (intersect) {
661 default_regd = ab->default_regd[reg_info->phy_id];
662
663 /* Get a new regd by intersecting the received regd with
664 * our default regd.
665 */
666 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
667 kfree(tmp_regd);
668 if (!new_regd) {
669 ath11k_warn(ab, "Unable to create intersected regdomain\n");
670 goto ret;
671 }
672 } else {
673 new_regd = tmp_regd;
674 }
675
676 ret:
677 return new_regd;
678 }
679
ath11k_regd_update_work(struct work_struct * work)680 void ath11k_regd_update_work(struct work_struct *work)
681 {
682 struct ath11k *ar = container_of(work, struct ath11k,
683 regd_update_work);
684 int ret;
685
686 ret = ath11k_regd_update(ar, false);
687 if (ret) {
688 /* Firmware has already moved to the new regd. We need
689 * to maintain channel consistency across FW, Host driver
690 * and userspace. Hence as a fallback mechanism we can set
691 * the prev or default country code to the firmware.
692 */
693 /* TODO: Implement Fallback Mechanism */
694 }
695 }
696
ath11k_reg_init(struct ath11k * ar)697 void ath11k_reg_init(struct ath11k *ar)
698 {
699 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
700 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
701 }
702
ath11k_reg_free(struct ath11k_base * ab)703 void ath11k_reg_free(struct ath11k_base *ab)
704 {
705 int i;
706
707 for (i = 0; i < ab->hw_params.max_radios; i++) {
708 kfree(ab->default_regd[i]);
709 kfree(ab->new_regd[i]);
710 }
711 }
712