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 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
251
252 kfree(regd_copy);
253
254 if (ret)
255 goto err;
256
257 if (ar->state == ATH11K_STATE_ON) {
258 ret = ath11k_reg_update_chan_list(ar);
259 if (ret)
260 goto err;
261 }
262
263 return 0;
264 err:
265 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
266 return ret;
267 }
268
269 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)270 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
271 {
272 switch (dfs_region) {
273 case ATH11K_DFS_REG_FCC:
274 case ATH11K_DFS_REG_CN:
275 return NL80211_DFS_FCC;
276 case ATH11K_DFS_REG_ETSI:
277 case ATH11K_DFS_REG_KR:
278 return NL80211_DFS_ETSI;
279 case ATH11K_DFS_REG_MKK:
280 case ATH11K_DFS_REG_MKK_N:
281 return NL80211_DFS_JP;
282 default:
283 return NL80211_DFS_UNSET;
284 }
285 }
286
ath11k_map_fw_reg_flags(u16 reg_flags)287 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
288 {
289 u32 flags = 0;
290
291 if (reg_flags & REGULATORY_CHAN_NO_IR)
292 flags = NL80211_RRF_NO_IR;
293
294 if (reg_flags & REGULATORY_CHAN_RADAR)
295 flags |= NL80211_RRF_DFS;
296
297 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
298 flags |= NL80211_RRF_NO_OFDM;
299
300 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
301 flags |= NL80211_RRF_NO_OUTDOOR;
302
303 if (reg_flags & REGULATORY_CHAN_NO_HT40)
304 flags |= NL80211_RRF_NO_HT40;
305
306 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
307 flags |= NL80211_RRF_NO_80MHZ;
308
309 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
310 flags |= NL80211_RRF_NO_160MHZ;
311
312 return flags;
313 }
314
315 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)316 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
317 struct ieee80211_reg_rule *rule2)
318 {
319 u32 start_freq1, end_freq1;
320 u32 start_freq2, end_freq2;
321
322 start_freq1 = rule1->freq_range.start_freq_khz;
323 start_freq2 = rule2->freq_range.start_freq_khz;
324
325 end_freq1 = rule1->freq_range.end_freq_khz;
326 end_freq2 = rule2->freq_range.end_freq_khz;
327
328 if ((start_freq1 >= start_freq2 &&
329 start_freq1 < end_freq2) ||
330 (start_freq2 > start_freq1 &&
331 start_freq2 < end_freq1))
332 return true;
333
334 /* TODO: Should we restrict intersection feasibility
335 * based on min bandwidth of the intersected region also,
336 * say the intersected rule should have a min bandwidth
337 * of 20MHz?
338 */
339
340 return false;
341 }
342
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)343 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
344 struct ieee80211_reg_rule *rule2,
345 struct ieee80211_reg_rule *new_rule)
346 {
347 u32 start_freq1, end_freq1;
348 u32 start_freq2, end_freq2;
349 u32 freq_diff, max_bw;
350
351 start_freq1 = rule1->freq_range.start_freq_khz;
352 start_freq2 = rule2->freq_range.start_freq_khz;
353
354 end_freq1 = rule1->freq_range.end_freq_khz;
355 end_freq2 = rule2->freq_range.end_freq_khz;
356
357 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
358 start_freq2);
359 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
360
361 freq_diff = new_rule->freq_range.end_freq_khz -
362 new_rule->freq_range.start_freq_khz;
363 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
364 rule2->freq_range.max_bandwidth_khz);
365 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
366
367 new_rule->power_rule.max_antenna_gain =
368 min_t(u32, rule1->power_rule.max_antenna_gain,
369 rule2->power_rule.max_antenna_gain);
370
371 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
372 rule2->power_rule.max_eirp);
373
374 /* Use the flags of both the rules */
375 new_rule->flags = rule1->flags | rule2->flags;
376
377 /* To be safe, lts use the max cac timeout of both rules */
378 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
379 rule2->dfs_cac_ms);
380 }
381
382 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)383 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
384 struct ieee80211_regdomain *curr_regd)
385 {
386 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
387 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
388 struct ieee80211_regdomain *new_regd = NULL;
389 u8 i, j, k;
390
391 num_old_regd_rules = default_regd->n_reg_rules;
392 num_curr_regd_rules = curr_regd->n_reg_rules;
393 num_new_regd_rules = 0;
394
395 /* Find the number of intersecting rules to allocate new regd memory */
396 for (i = 0; i < num_old_regd_rules; i++) {
397 old_rule = default_regd->reg_rules + i;
398 for (j = 0; j < num_curr_regd_rules; j++) {
399 curr_rule = curr_regd->reg_rules + j;
400
401 if (ath11k_reg_can_intersect(old_rule, curr_rule))
402 num_new_regd_rules++;
403 }
404 }
405
406 if (!num_new_regd_rules)
407 return NULL;
408
409 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
410 sizeof(struct ieee80211_reg_rule)),
411 GFP_ATOMIC);
412
413 if (!new_regd)
414 return NULL;
415
416 /* We set the new country and dfs region directly and only trim
417 * the freq, power, antenna gain by intersecting with the
418 * default regdomain. Also MAX of the dfs cac timeout is selected.
419 */
420 new_regd->n_reg_rules = num_new_regd_rules;
421 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
422 new_regd->dfs_region = curr_regd->dfs_region;
423 new_rule = new_regd->reg_rules;
424
425 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
426 old_rule = default_regd->reg_rules + i;
427 for (j = 0; j < num_curr_regd_rules; j++) {
428 curr_rule = curr_regd->reg_rules + j;
429
430 if (ath11k_reg_can_intersect(old_rule, curr_rule))
431 ath11k_reg_intersect_rules(old_rule, curr_rule,
432 (new_rule + k++));
433 }
434 }
435 return new_regd;
436 }
437
438 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)439 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
440 {
441 switch (dfs_region) {
442 case NL80211_DFS_FCC:
443 return "FCC";
444 case NL80211_DFS_ETSI:
445 return "ETSI";
446 case NL80211_DFS_JP:
447 return "JP";
448 default:
449 return "UNSET";
450 }
451 }
452
453 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)454 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
455 {
456 u16 bw;
457
458 if (end_freq <= start_freq)
459 return 0;
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 >= 20 && bw < 40)
469 bw = 20;
470 else
471 bw = 0;
472
473 return bw;
474 }
475
476 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)477 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
478 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
479 u32 reg_flags)
480 {
481 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
482 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
483 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
484 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
485 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
486 reg_rule->flags = reg_flags;
487 }
488
489 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)490 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
491 struct ieee80211_regdomain *regd,
492 struct cur_reg_rule *reg_rule,
493 u8 *rule_idx, u32 flags, u16 max_bw)
494 {
495 u32 start_freq;
496 u32 end_freq;
497 u16 bw;
498 u8 i;
499
500 i = *rule_idx;
501
502 /* there might be situations when even the input rule must be dropped */
503 i--;
504
505 /* frequencies below weather radar */
506 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
507 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
508 if (bw > 0) {
509 i++;
510
511 ath11k_reg_update_rule(regd->reg_rules + i,
512 reg_rule->start_freq,
513 ETSI_WEATHER_RADAR_BAND_LOW, bw,
514 reg_rule->ant_gain, reg_rule->reg_power,
515 flags);
516
517 ath11k_dbg(ab, ATH11K_DBG_REG,
518 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
519 i + 1, reg_rule->start_freq,
520 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
521 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
522 flags);
523 }
524
525 /* weather radar frequencies */
526 start_freq = max_t(u32, reg_rule->start_freq,
527 ETSI_WEATHER_RADAR_BAND_LOW);
528 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
529
530 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
531 if (bw > 0) {
532 i++;
533
534 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
535 end_freq, bw, reg_rule->ant_gain,
536 reg_rule->reg_power, flags);
537
538 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
539
540 ath11k_dbg(ab, ATH11K_DBG_REG,
541 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
542 i + 1, start_freq, end_freq, bw,
543 reg_rule->ant_gain, reg_rule->reg_power,
544 regd->reg_rules[i].dfs_cac_ms, flags);
545 }
546
547 /* frequencies above weather radar */
548 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
549 reg_rule->end_freq, max_bw);
550 if (bw > 0) {
551 i++;
552
553 ath11k_reg_update_rule(regd->reg_rules + i,
554 ETSI_WEATHER_RADAR_BAND_HIGH,
555 reg_rule->end_freq, bw,
556 reg_rule->ant_gain, reg_rule->reg_power,
557 flags);
558
559 ath11k_dbg(ab, ATH11K_DBG_REG,
560 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
561 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
562 reg_rule->end_freq, bw, reg_rule->ant_gain,
563 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
564 flags);
565 }
566
567 *rule_idx = i;
568 }
569
570 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)571 ath11k_reg_build_regd(struct ath11k_base *ab,
572 struct cur_regulatory_info *reg_info, bool intersect)
573 {
574 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
575 struct cur_reg_rule *reg_rule;
576 u8 i = 0, j = 0;
577 u8 num_rules;
578 u16 max_bw;
579 u32 flags;
580 char alpha2[3];
581
582 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
583
584 if (!num_rules)
585 goto ret;
586
587 /* Add max additional rules to accommodate weather radar band */
588 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
589 num_rules += 2;
590
591 tmp_regd = kzalloc(sizeof(*tmp_regd) +
592 (num_rules * sizeof(struct ieee80211_reg_rule)),
593 GFP_ATOMIC);
594 if (!tmp_regd)
595 goto ret;
596
597 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
598 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
599 alpha2[2] = '\0';
600 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
601
602 ath11k_dbg(ab, ATH11K_DBG_REG,
603 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
604 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
605 reg_info->dfs_region, num_rules);
606 /* Update reg_rules[] below. Firmware is expected to
607 * send these rules in order(2G rules first and then 5G)
608 */
609 for (; i < num_rules; i++) {
610 if (reg_info->num_2g_reg_rules &&
611 (i < reg_info->num_2g_reg_rules)) {
612 reg_rule = reg_info->reg_rules_2g_ptr + i;
613 max_bw = min_t(u16, reg_rule->max_bw,
614 reg_info->max_bw_2g);
615 flags = 0;
616 } else if (reg_info->num_5g_reg_rules &&
617 (j < reg_info->num_5g_reg_rules)) {
618 reg_rule = reg_info->reg_rules_5g_ptr + j++;
619 max_bw = min_t(u16, reg_rule->max_bw,
620 reg_info->max_bw_5g);
621
622 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
623 * BW Auto correction, we can enable this by default
624 * for all 5G rules here. The regulatory core performs
625 * BW correction if required and applies flags as
626 * per other BW rule flags we pass from here
627 */
628 flags = NL80211_RRF_AUTO_BW;
629 } else {
630 break;
631 }
632
633 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
634
635 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
636 reg_rule->start_freq,
637 reg_rule->end_freq, max_bw,
638 reg_rule->ant_gain, reg_rule->reg_power,
639 flags);
640
641 /* Update dfs cac timeout if the dfs domain is ETSI and the
642 * new rule covers weather radar band.
643 * Default value of '0' corresponds to 60s timeout, so no
644 * need to update that for other rules.
645 */
646 if (flags & NL80211_RRF_DFS &&
647 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
648 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
649 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
650 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
651 reg_rule, &i,
652 flags, max_bw);
653 continue;
654 }
655
656 ath11k_dbg(ab, ATH11K_DBG_REG,
657 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
658 i + 1, reg_rule->start_freq, reg_rule->end_freq,
659 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
660 tmp_regd->reg_rules[i].dfs_cac_ms,
661 flags);
662 }
663
664 tmp_regd->n_reg_rules = i;
665
666 if (intersect) {
667 default_regd = ab->default_regd[reg_info->phy_id];
668
669 /* Get a new regd by intersecting the received regd with
670 * our default regd.
671 */
672 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
673 kfree(tmp_regd);
674 if (!new_regd) {
675 ath11k_warn(ab, "Unable to create intersected regdomain\n");
676 goto ret;
677 }
678 } else {
679 new_regd = tmp_regd;
680 }
681
682 ret:
683 return new_regd;
684 }
685
ath11k_regd_update_work(struct work_struct * work)686 void ath11k_regd_update_work(struct work_struct *work)
687 {
688 struct ath11k *ar = container_of(work, struct ath11k,
689 regd_update_work);
690 int ret;
691
692 ret = ath11k_regd_update(ar);
693 if (ret) {
694 /* Firmware has already moved to the new regd. We need
695 * to maintain channel consistency across FW, Host driver
696 * and userspace. Hence as a fallback mechanism we can set
697 * the prev or default country code to the firmware.
698 */
699 /* TODO: Implement Fallback Mechanism */
700 }
701 }
702
ath11k_reg_init(struct ath11k * ar)703 void ath11k_reg_init(struct ath11k *ar)
704 {
705 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
706 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
707 }
708
ath11k_reg_free(struct ath11k_base * ab)709 void ath11k_reg_free(struct ath11k_base *ab)
710 {
711 int i;
712
713 for (i = 0; i < ab->hw_params.max_radios; i++) {
714 kfree(ab->default_regd[i]);
715 kfree(ab->new_regd[i]);
716 }
717 }
718