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)201 int ath11k_regd_update(struct ath11k *ar)
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 /* Prefer the latest regd update over default if it's available */
213 if (ab->new_regd[pdev_id]) {
214 regd = ab->new_regd[pdev_id];
215 } else {
216 /* Apply the regd received during init through
217 * WMI_REG_CHAN_LIST_CC event. In case of failure to
218 * receive the regd, initialize with a default world
219 * regulatory.
220 */
221 if (ab->default_regd[pdev_id]) {
222 regd = ab->default_regd[pdev_id];
223 } else {
224 ath11k_warn(ab,
225 "failed to receive default regd during init\n");
226 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
227 }
228 }
229
230 if (!regd) {
231 ret = -EINVAL;
232 spin_unlock_bh(&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(regd_len, GFP_ATOMIC);
240 if (regd_copy)
241 ath11k_copy_regd(regd, regd_copy);
242
243 spin_unlock_bh(&ab->base_lock);
244
245 if (!regd_copy) {
246 ret = -ENOMEM;
247 goto err;
248 }
249
250 rtnl_lock();
251 ret = regulatory_set_wiphy_regd_sync_rtnl(ar->hw->wiphy, regd_copy);
252 rtnl_unlock();
253
254 kfree(regd_copy);
255
256 if (ret)
257 goto err;
258
259 if (ar->state == ATH11K_STATE_ON) {
260 ret = ath11k_reg_update_chan_list(ar);
261 if (ret)
262 goto err;
263 }
264
265 return 0;
266 err:
267 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
268 return ret;
269 }
270
271 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)272 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
273 {
274 switch (dfs_region) {
275 case ATH11K_DFS_REG_FCC:
276 case ATH11K_DFS_REG_CN:
277 return NL80211_DFS_FCC;
278 case ATH11K_DFS_REG_ETSI:
279 case ATH11K_DFS_REG_KR:
280 return NL80211_DFS_ETSI;
281 case ATH11K_DFS_REG_MKK:
282 return NL80211_DFS_JP;
283 default:
284 return NL80211_DFS_UNSET;
285 }
286 }
287
ath11k_map_fw_reg_flags(u16 reg_flags)288 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
289 {
290 u32 flags = 0;
291
292 if (reg_flags & REGULATORY_CHAN_NO_IR)
293 flags = NL80211_RRF_NO_IR;
294
295 if (reg_flags & REGULATORY_CHAN_RADAR)
296 flags |= NL80211_RRF_DFS;
297
298 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
299 flags |= NL80211_RRF_NO_OFDM;
300
301 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
302 flags |= NL80211_RRF_NO_OUTDOOR;
303
304 if (reg_flags & REGULATORY_CHAN_NO_HT40)
305 flags |= NL80211_RRF_NO_HT40;
306
307 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
308 flags |= NL80211_RRF_NO_80MHZ;
309
310 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
311 flags |= NL80211_RRF_NO_160MHZ;
312
313 return flags;
314 }
315
316 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)317 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
318 struct ieee80211_reg_rule *rule2)
319 {
320 u32 start_freq1, end_freq1;
321 u32 start_freq2, end_freq2;
322
323 start_freq1 = rule1->freq_range.start_freq_khz;
324 start_freq2 = rule2->freq_range.start_freq_khz;
325
326 end_freq1 = rule1->freq_range.end_freq_khz;
327 end_freq2 = rule2->freq_range.end_freq_khz;
328
329 if ((start_freq1 >= start_freq2 &&
330 start_freq1 < end_freq2) ||
331 (start_freq2 > start_freq1 &&
332 start_freq2 < end_freq1))
333 return true;
334
335 /* TODO: Should we restrict intersection feasibility
336 * based on min bandwidth of the intersected region also,
337 * say the intersected rule should have a min bandwidth
338 * of 20MHz?
339 */
340
341 return false;
342 }
343
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)344 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
345 struct ieee80211_reg_rule *rule2,
346 struct ieee80211_reg_rule *new_rule)
347 {
348 u32 start_freq1, end_freq1;
349 u32 start_freq2, end_freq2;
350 u32 freq_diff, max_bw;
351
352 start_freq1 = rule1->freq_range.start_freq_khz;
353 start_freq2 = rule2->freq_range.start_freq_khz;
354
355 end_freq1 = rule1->freq_range.end_freq_khz;
356 end_freq2 = rule2->freq_range.end_freq_khz;
357
358 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
359 start_freq2);
360 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
361
362 freq_diff = new_rule->freq_range.end_freq_khz -
363 new_rule->freq_range.start_freq_khz;
364 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
365 rule2->freq_range.max_bandwidth_khz);
366 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
367
368 new_rule->power_rule.max_antenna_gain =
369 min_t(u32, rule1->power_rule.max_antenna_gain,
370 rule2->power_rule.max_antenna_gain);
371
372 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
373 rule2->power_rule.max_eirp);
374
375 /* Use the flags of both the rules */
376 new_rule->flags = rule1->flags | rule2->flags;
377
378 /* To be safe, lts use the max cac timeout of both rules */
379 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
380 rule2->dfs_cac_ms);
381 }
382
383 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)384 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
385 struct ieee80211_regdomain *curr_regd)
386 {
387 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
388 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
389 struct ieee80211_regdomain *new_regd = NULL;
390 u8 i, j, k;
391
392 num_old_regd_rules = default_regd->n_reg_rules;
393 num_curr_regd_rules = curr_regd->n_reg_rules;
394 num_new_regd_rules = 0;
395
396 /* Find the number of intersecting rules to allocate new regd memory */
397 for (i = 0; i < num_old_regd_rules; i++) {
398 old_rule = default_regd->reg_rules + i;
399 for (j = 0; j < num_curr_regd_rules; j++) {
400 curr_rule = curr_regd->reg_rules + j;
401
402 if (ath11k_reg_can_intersect(old_rule, curr_rule))
403 num_new_regd_rules++;
404 }
405 }
406
407 if (!num_new_regd_rules)
408 return NULL;
409
410 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
411 sizeof(struct ieee80211_reg_rule)),
412 GFP_ATOMIC);
413
414 if (!new_regd)
415 return NULL;
416
417 /* We set the new country and dfs region directly and only trim
418 * the freq, power, antenna gain by intersecting with the
419 * default regdomain. Also MAX of the dfs cac timeout is selected.
420 */
421 new_regd->n_reg_rules = num_new_regd_rules;
422 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
423 new_regd->dfs_region = curr_regd->dfs_region;
424 new_rule = new_regd->reg_rules;
425
426 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
427 old_rule = default_regd->reg_rules + i;
428 for (j = 0; j < num_curr_regd_rules; j++) {
429 curr_rule = curr_regd->reg_rules + j;
430
431 if (ath11k_reg_can_intersect(old_rule, curr_rule))
432 ath11k_reg_intersect_rules(old_rule, curr_rule,
433 (new_rule + k++));
434 }
435 }
436 return new_regd;
437 }
438
439 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)440 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
441 {
442 switch (dfs_region) {
443 case NL80211_DFS_FCC:
444 return "FCC";
445 case NL80211_DFS_ETSI:
446 return "ETSI";
447 case NL80211_DFS_JP:
448 return "JP";
449 default:
450 return "UNSET";
451 }
452 }
453
454 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)455 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
456 {
457 u16 bw;
458
459 if (end_freq <= start_freq)
460 return 0;
461
462 bw = end_freq - start_freq;
463 bw = min_t(u16, bw, max_bw);
464
465 if (bw >= 80 && bw < 160)
466 bw = 80;
467 else if (bw >= 40 && bw < 80)
468 bw = 40;
469 else if (bw >= 20 && bw < 40)
470 bw = 20;
471 else
472 bw = 0;
473
474 return bw;
475 }
476
477 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)478 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
479 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
480 u32 reg_flags)
481 {
482 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
483 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
484 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
485 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
486 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
487 reg_rule->flags = reg_flags;
488 }
489
490 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)491 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
492 struct ieee80211_regdomain *regd,
493 struct cur_reg_rule *reg_rule,
494 u8 *rule_idx, u32 flags, u16 max_bw)
495 {
496 u32 start_freq;
497 u32 end_freq;
498 u16 bw;
499 u8 i;
500
501 i = *rule_idx;
502
503 /* there might be situations when even the input rule must be dropped */
504 i--;
505
506 /* frequencies below weather radar */
507 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
508 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
509 if (bw > 0) {
510 i++;
511
512 ath11k_reg_update_rule(regd->reg_rules + i,
513 reg_rule->start_freq,
514 ETSI_WEATHER_RADAR_BAND_LOW, bw,
515 reg_rule->ant_gain, reg_rule->reg_power,
516 flags);
517
518 ath11k_dbg(ab, ATH11K_DBG_REG,
519 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
520 i + 1, reg_rule->start_freq,
521 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
522 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
523 flags);
524 }
525
526 /* weather radar frequencies */
527 start_freq = max_t(u32, reg_rule->start_freq,
528 ETSI_WEATHER_RADAR_BAND_LOW);
529 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
530
531 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
532 if (bw > 0) {
533 i++;
534
535 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
536 end_freq, bw, reg_rule->ant_gain,
537 reg_rule->reg_power, flags);
538
539 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
540
541 ath11k_dbg(ab, ATH11K_DBG_REG,
542 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
543 i + 1, start_freq, end_freq, bw,
544 reg_rule->ant_gain, reg_rule->reg_power,
545 regd->reg_rules[i].dfs_cac_ms, flags);
546 }
547
548 /* frequencies above weather radar */
549 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
550 reg_rule->end_freq, max_bw);
551 if (bw > 0) {
552 i++;
553
554 ath11k_reg_update_rule(regd->reg_rules + i,
555 ETSI_WEATHER_RADAR_BAND_HIGH,
556 reg_rule->end_freq, bw,
557 reg_rule->ant_gain, reg_rule->reg_power,
558 flags);
559
560 ath11k_dbg(ab, ATH11K_DBG_REG,
561 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
562 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
563 reg_rule->end_freq, bw, reg_rule->ant_gain,
564 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
565 flags);
566 }
567
568 *rule_idx = i;
569 }
570
571 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)572 ath11k_reg_build_regd(struct ath11k_base *ab,
573 struct cur_regulatory_info *reg_info, bool intersect)
574 {
575 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
576 struct cur_reg_rule *reg_rule;
577 u8 i = 0, j = 0;
578 u8 num_rules;
579 u16 max_bw;
580 u32 flags;
581 char alpha2[3];
582
583 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
584
585 if (!num_rules)
586 goto ret;
587
588 /* Add max additional rules to accommodate weather radar band */
589 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
590 num_rules += 2;
591
592 tmp_regd = kzalloc(sizeof(*tmp_regd) +
593 (num_rules * sizeof(struct ieee80211_reg_rule)),
594 GFP_ATOMIC);
595 if (!tmp_regd)
596 goto ret;
597
598 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
599 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
600 alpha2[2] = '\0';
601 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
602
603 ath11k_dbg(ab, ATH11K_DBG_REG,
604 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
605 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
606 reg_info->dfs_region, num_rules);
607 /* Update reg_rules[] below. Firmware is expected to
608 * send these rules in order(2G rules first and then 5G)
609 */
610 for (; i < num_rules; i++) {
611 if (reg_info->num_2g_reg_rules &&
612 (i < reg_info->num_2g_reg_rules)) {
613 reg_rule = reg_info->reg_rules_2g_ptr + i;
614 max_bw = min_t(u16, reg_rule->max_bw,
615 reg_info->max_bw_2g);
616 flags = 0;
617 } else if (reg_info->num_5g_reg_rules &&
618 (j < reg_info->num_5g_reg_rules)) {
619 reg_rule = reg_info->reg_rules_5g_ptr + j++;
620 max_bw = min_t(u16, reg_rule->max_bw,
621 reg_info->max_bw_5g);
622
623 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
624 * BW Auto correction, we can enable this by default
625 * for all 5G rules here. The regulatory core performs
626 * BW correction if required and applies flags as
627 * per other BW rule flags we pass from here
628 */
629 flags = NL80211_RRF_AUTO_BW;
630 } else {
631 break;
632 }
633
634 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
635
636 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
637 reg_rule->start_freq,
638 reg_rule->end_freq, max_bw,
639 reg_rule->ant_gain, reg_rule->reg_power,
640 flags);
641
642 /* Update dfs cac timeout if the dfs domain is ETSI and the
643 * new rule covers weather radar band.
644 * Default value of '0' corresponds to 60s timeout, so no
645 * need to update that for other rules.
646 */
647 if (flags & NL80211_RRF_DFS &&
648 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
649 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
650 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
651 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
652 reg_rule, &i,
653 flags, max_bw);
654 continue;
655 }
656
657 ath11k_dbg(ab, ATH11K_DBG_REG,
658 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
659 i + 1, reg_rule->start_freq, reg_rule->end_freq,
660 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
661 tmp_regd->reg_rules[i].dfs_cac_ms,
662 flags);
663 }
664
665 tmp_regd->n_reg_rules = i;
666
667 if (intersect) {
668 default_regd = ab->default_regd[reg_info->phy_id];
669
670 /* Get a new regd by intersecting the received regd with
671 * our default regd.
672 */
673 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
674 kfree(tmp_regd);
675 if (!new_regd) {
676 ath11k_warn(ab, "Unable to create intersected regdomain\n");
677 goto ret;
678 }
679 } else {
680 new_regd = tmp_regd;
681 }
682
683 ret:
684 return new_regd;
685 }
686
ath11k_regd_update_work(struct work_struct * work)687 void ath11k_regd_update_work(struct work_struct *work)
688 {
689 struct ath11k *ar = container_of(work, struct ath11k,
690 regd_update_work);
691 int ret;
692
693 ret = ath11k_regd_update(ar);
694 if (ret) {
695 /* Firmware has already moved to the new regd. We need
696 * to maintain channel consistency across FW, Host driver
697 * and userspace. Hence as a fallback mechanism we can set
698 * the prev or default country code to the firmware.
699 */
700 /* TODO: Implement Fallback Mechanism */
701 }
702 }
703
ath11k_reg_init(struct ath11k * ar)704 void ath11k_reg_init(struct ath11k *ar)
705 {
706 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
707 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
708 }
709
ath11k_reg_free(struct ath11k_base * ab)710 void ath11k_reg_free(struct ath11k_base *ab)
711 {
712 int i;
713
714 for (i = 0; i < ab->hw_params.max_radios; i++) {
715 kfree(ab->default_regd[i]);
716 kfree(ab->new_regd[i]);
717 }
718 }
719