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
84 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
85 if (ret)
86 ath11k_warn(ar->ab,
87 "INIT Country code set to fw failed : %d\n", ret);
88 }
89
ath11k_reg_update_chan_list(struct ath11k * ar)90 int ath11k_reg_update_chan_list(struct ath11k *ar)
91 {
92 struct ieee80211_supported_band **bands;
93 struct scan_chan_list_params *params;
94 struct ieee80211_channel *channel;
95 struct ieee80211_hw *hw = ar->hw;
96 struct channel_param *ch;
97 enum nl80211_band band;
98 int num_channels = 0;
99 int params_len;
100 int i, ret;
101
102 bands = hw->wiphy->bands;
103 for (band = 0; band < NUM_NL80211_BANDS; band++) {
104 if (!bands[band])
105 continue;
106
107 for (i = 0; i < bands[band]->n_channels; i++) {
108 if (bands[band]->channels[i].flags &
109 IEEE80211_CHAN_DISABLED)
110 continue;
111
112 num_channels++;
113 }
114 }
115
116 if (WARN_ON(!num_channels))
117 return -EINVAL;
118
119 params_len = sizeof(struct scan_chan_list_params) +
120 num_channels * sizeof(struct channel_param);
121 params = kzalloc(params_len, GFP_KERNEL);
122
123 if (!params)
124 return -ENOMEM;
125
126 params->pdev_id = ar->pdev->pdev_id;
127 params->nallchans = num_channels;
128
129 ch = params->ch_param;
130
131 for (band = 0; band < NUM_NL80211_BANDS; band++) {
132 if (!bands[band])
133 continue;
134
135 for (i = 0; i < bands[band]->n_channels; i++) {
136 channel = &bands[band]->channels[i];
137
138 if (channel->flags & IEEE80211_CHAN_DISABLED)
139 continue;
140
141 /* TODO: Set to true/false based on some condition? */
142 ch->allow_ht = true;
143 ch->allow_vht = true;
144 ch->allow_he = true;
145
146 ch->dfs_set =
147 !!(channel->flags & IEEE80211_CHAN_RADAR);
148 ch->is_chan_passive = !!(channel->flags &
149 IEEE80211_CHAN_NO_IR);
150 ch->is_chan_passive |= ch->dfs_set;
151 ch->mhz = channel->center_freq;
152 ch->cfreq1 = channel->center_freq;
153 ch->minpower = 0;
154 ch->maxpower = channel->max_power * 2;
155 ch->maxregpower = channel->max_reg_power * 2;
156 ch->antennamax = channel->max_antenna_gain * 2;
157
158 /* TODO: Use appropriate phymodes */
159 if (channel->band == NL80211_BAND_2GHZ)
160 ch->phy_mode = MODE_11G;
161 else
162 ch->phy_mode = MODE_11A;
163
164 if (channel->band == NL80211_BAND_6GHZ &&
165 cfg80211_channel_is_psc(channel))
166 ch->psc_channel = true;
167
168 ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
169 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
170 i, params->nallchans,
171 ch->mhz, ch->maxpower, ch->maxregpower,
172 ch->antennamax, ch->phy_mode);
173
174 ch++;
175 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
176 * set_agile, reg_class_idx
177 */
178 }
179 }
180
181 ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
182 kfree(params);
183
184 return ret;
185 }
186
ath11k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)187 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
188 struct ieee80211_regdomain *regd_copy)
189 {
190 u8 i;
191
192 /* The caller should have checked error conditions */
193 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
194
195 for (i = 0; i < regd_orig->n_reg_rules; i++)
196 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
197 sizeof(struct ieee80211_reg_rule));
198 }
199
ath11k_regd_update(struct ath11k * ar,bool init)200 int ath11k_regd_update(struct ath11k *ar, bool init)
201 {
202 struct ieee80211_regdomain *regd, *regd_copy = NULL;
203 int ret, regd_len, pdev_id;
204 struct ath11k_base *ab;
205
206 ab = ar->ab;
207 pdev_id = ar->pdev_idx;
208
209 spin_lock_bh(&ab->base_lock);
210
211 if (init) {
212 /* Apply the regd received during init through
213 * WMI_REG_CHAN_LIST_CC event. In case of failure to
214 * receive the regd, initialize with a default world
215 * regulatory.
216 */
217 if (ab->default_regd[pdev_id]) {
218 regd = ab->default_regd[pdev_id];
219 } else {
220 ath11k_warn(ab,
221 "failed to receive default regd during init\n");
222 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
223 }
224 } else {
225 regd = ab->new_regd[pdev_id];
226 }
227
228 if (!regd) {
229 ret = -EINVAL;
230 spin_unlock_bh(&ab->base_lock);
231 goto err;
232 }
233
234 regd_len = sizeof(*regd) + (regd->n_reg_rules *
235 sizeof(struct ieee80211_reg_rule));
236
237 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
238 if (regd_copy)
239 ath11k_copy_regd(regd, regd_copy);
240
241 spin_unlock_bh(&ab->base_lock);
242
243 if (!regd_copy) {
244 ret = -ENOMEM;
245 goto err;
246 }
247
248 rtnl_lock();
249 ret = regulatory_set_wiphy_regd_sync_rtnl(ar->hw->wiphy, regd_copy);
250 rtnl_unlock();
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 return NL80211_DFS_JP;
281 default:
282 return NL80211_DFS_UNSET;
283 }
284 }
285
ath11k_map_fw_reg_flags(u16 reg_flags)286 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
287 {
288 u32 flags = 0;
289
290 if (reg_flags & REGULATORY_CHAN_NO_IR)
291 flags = NL80211_RRF_NO_IR;
292
293 if (reg_flags & REGULATORY_CHAN_RADAR)
294 flags |= NL80211_RRF_DFS;
295
296 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
297 flags |= NL80211_RRF_NO_OFDM;
298
299 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
300 flags |= NL80211_RRF_NO_OUTDOOR;
301
302 if (reg_flags & REGULATORY_CHAN_NO_HT40)
303 flags |= NL80211_RRF_NO_HT40;
304
305 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
306 flags |= NL80211_RRF_NO_80MHZ;
307
308 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
309 flags |= NL80211_RRF_NO_160MHZ;
310
311 return flags;
312 }
313
314 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)315 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
316 struct ieee80211_reg_rule *rule2)
317 {
318 u32 start_freq1, end_freq1;
319 u32 start_freq2, end_freq2;
320
321 start_freq1 = rule1->freq_range.start_freq_khz;
322 start_freq2 = rule2->freq_range.start_freq_khz;
323
324 end_freq1 = rule1->freq_range.end_freq_khz;
325 end_freq2 = rule2->freq_range.end_freq_khz;
326
327 if ((start_freq1 >= start_freq2 &&
328 start_freq1 < end_freq2) ||
329 (start_freq2 > start_freq1 &&
330 start_freq2 < end_freq1))
331 return true;
332
333 /* TODO: Should we restrict intersection feasibility
334 * based on min bandwidth of the intersected region also,
335 * say the intersected rule should have a min bandwidth
336 * of 20MHz?
337 */
338
339 return false;
340 }
341
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)342 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
343 struct ieee80211_reg_rule *rule2,
344 struct ieee80211_reg_rule *new_rule)
345 {
346 u32 start_freq1, end_freq1;
347 u32 start_freq2, end_freq2;
348 u32 freq_diff, max_bw;
349
350 start_freq1 = rule1->freq_range.start_freq_khz;
351 start_freq2 = rule2->freq_range.start_freq_khz;
352
353 end_freq1 = rule1->freq_range.end_freq_khz;
354 end_freq2 = rule2->freq_range.end_freq_khz;
355
356 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
357 start_freq2);
358 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
359
360 freq_diff = new_rule->freq_range.end_freq_khz -
361 new_rule->freq_range.start_freq_khz;
362 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
363 rule2->freq_range.max_bandwidth_khz);
364 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
365
366 new_rule->power_rule.max_antenna_gain =
367 min_t(u32, rule1->power_rule.max_antenna_gain,
368 rule2->power_rule.max_antenna_gain);
369
370 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
371 rule2->power_rule.max_eirp);
372
373 /* Use the flags of both the rules */
374 new_rule->flags = rule1->flags | rule2->flags;
375
376 /* To be safe, lts use the max cac timeout of both rules */
377 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
378 rule2->dfs_cac_ms);
379 }
380
381 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)382 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
383 struct ieee80211_regdomain *curr_regd)
384 {
385 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
386 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
387 struct ieee80211_regdomain *new_regd = NULL;
388 u8 i, j, k;
389
390 num_old_regd_rules = default_regd->n_reg_rules;
391 num_curr_regd_rules = curr_regd->n_reg_rules;
392 num_new_regd_rules = 0;
393
394 /* Find the number of intersecting rules to allocate new regd memory */
395 for (i = 0; i < num_old_regd_rules; i++) {
396 old_rule = default_regd->reg_rules + i;
397 for (j = 0; j < num_curr_regd_rules; j++) {
398 curr_rule = curr_regd->reg_rules + j;
399
400 if (ath11k_reg_can_intersect(old_rule, curr_rule))
401 num_new_regd_rules++;
402 }
403 }
404
405 if (!num_new_regd_rules)
406 return NULL;
407
408 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
409 sizeof(struct ieee80211_reg_rule)),
410 GFP_ATOMIC);
411
412 if (!new_regd)
413 return NULL;
414
415 /* We set the new country and dfs region directly and only trim
416 * the freq, power, antenna gain by intersecting with the
417 * default regdomain. Also MAX of the dfs cac timeout is selected.
418 */
419 new_regd->n_reg_rules = num_new_regd_rules;
420 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
421 new_regd->dfs_region = curr_regd->dfs_region;
422 new_rule = new_regd->reg_rules;
423
424 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
425 old_rule = default_regd->reg_rules + i;
426 for (j = 0; j < num_curr_regd_rules; j++) {
427 curr_rule = curr_regd->reg_rules + j;
428
429 if (ath11k_reg_can_intersect(old_rule, curr_rule))
430 ath11k_reg_intersect_rules(old_rule, curr_rule,
431 (new_rule + k++));
432 }
433 }
434 return new_regd;
435 }
436
437 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)438 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
439 {
440 switch (dfs_region) {
441 case NL80211_DFS_FCC:
442 return "FCC";
443 case NL80211_DFS_ETSI:
444 return "ETSI";
445 case NL80211_DFS_JP:
446 return "JP";
447 default:
448 return "UNSET";
449 }
450 }
451
452 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)453 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
454 {
455 u16 bw;
456
457 bw = end_freq - start_freq;
458 bw = min_t(u16, bw, max_bw);
459
460 if (bw >= 80 && bw < 160)
461 bw = 80;
462 else if (bw >= 40 && bw < 80)
463 bw = 40;
464 else if (bw < 40)
465 bw = 20;
466
467 return bw;
468 }
469
470 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)471 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
472 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
473 u32 reg_flags)
474 {
475 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
476 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
477 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
478 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
479 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
480 reg_rule->flags = reg_flags;
481 }
482
483 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)484 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
485 struct ieee80211_regdomain *regd,
486 struct cur_reg_rule *reg_rule,
487 u8 *rule_idx, u32 flags, u16 max_bw)
488 {
489 u32 end_freq;
490 u16 bw;
491 u8 i;
492
493 i = *rule_idx;
494
495 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
496 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
497
498 ath11k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
499 ETSI_WEATHER_RADAR_BAND_LOW, bw,
500 reg_rule->ant_gain, reg_rule->reg_power,
501 flags);
502
503 ath11k_dbg(ab, ATH11K_DBG_REG,
504 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
505 i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
506 bw, reg_rule->ant_gain, reg_rule->reg_power,
507 regd->reg_rules[i].dfs_cac_ms,
508 flags);
509
510 if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
511 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
512 else
513 end_freq = reg_rule->end_freq;
514
515 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
516 max_bw);
517
518 i++;
519
520 ath11k_reg_update_rule(regd->reg_rules + i,
521 ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
522 reg_rule->ant_gain, reg_rule->reg_power,
523 flags);
524
525 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
526
527 ath11k_dbg(ab, ATH11K_DBG_REG,
528 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
529 i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
530 bw, reg_rule->ant_gain, reg_rule->reg_power,
531 regd->reg_rules[i].dfs_cac_ms,
532 flags);
533
534 if (end_freq == reg_rule->end_freq) {
535 regd->n_reg_rules--;
536 *rule_idx = i;
537 return;
538 }
539
540 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
541 reg_rule->end_freq, max_bw);
542
543 i++;
544
545 ath11k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
546 reg_rule->end_freq, bw,
547 reg_rule->ant_gain, reg_rule->reg_power,
548 flags);
549
550 ath11k_dbg(ab, ATH11K_DBG_REG,
551 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
552 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
553 bw, reg_rule->ant_gain, reg_rule->reg_power,
554 regd->reg_rules[i].dfs_cac_ms,
555 flags);
556
557 *rule_idx = i;
558 }
559
560 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)561 ath11k_reg_build_regd(struct ath11k_base *ab,
562 struct cur_regulatory_info *reg_info, bool intersect)
563 {
564 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
565 struct cur_reg_rule *reg_rule;
566 u8 i = 0, j = 0;
567 u8 num_rules;
568 u16 max_bw;
569 u32 flags;
570 char alpha2[3];
571
572 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
573
574 if (!num_rules)
575 goto ret;
576
577 /* Add max additional rules to accommodate weather radar band */
578 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
579 num_rules += 2;
580
581 tmp_regd = kzalloc(sizeof(*tmp_regd) +
582 (num_rules * sizeof(struct ieee80211_reg_rule)),
583 GFP_ATOMIC);
584 if (!tmp_regd)
585 goto ret;
586
587 tmp_regd->n_reg_rules = num_rules;
588 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
589 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
590 alpha2[2] = '\0';
591 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
592
593 ath11k_dbg(ab, ATH11K_DBG_REG,
594 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
595 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
596 reg_info->dfs_region, num_rules);
597 /* Update reg_rules[] below. Firmware is expected to
598 * send these rules in order(2G rules first and then 5G)
599 */
600 for (; i < tmp_regd->n_reg_rules; i++) {
601 if (reg_info->num_2g_reg_rules &&
602 (i < reg_info->num_2g_reg_rules)) {
603 reg_rule = reg_info->reg_rules_2g_ptr + i;
604 max_bw = min_t(u16, reg_rule->max_bw,
605 reg_info->max_bw_2g);
606 flags = 0;
607 } else if (reg_info->num_5g_reg_rules &&
608 (j < reg_info->num_5g_reg_rules)) {
609 reg_rule = reg_info->reg_rules_5g_ptr + j++;
610 max_bw = min_t(u16, reg_rule->max_bw,
611 reg_info->max_bw_5g);
612
613 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
614 * BW Auto correction, we can enable this by default
615 * for all 5G rules here. The regulatory core performs
616 * BW correction if required and applies flags as
617 * per other BW rule flags we pass from here
618 */
619 flags = NL80211_RRF_AUTO_BW;
620 } else {
621 break;
622 }
623
624 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
625
626 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
627 reg_rule->start_freq,
628 reg_rule->end_freq, max_bw,
629 reg_rule->ant_gain, reg_rule->reg_power,
630 flags);
631
632 /* Update dfs cac timeout if the dfs domain is ETSI and the
633 * new rule covers weather radar band.
634 * Default value of '0' corresponds to 60s timeout, so no
635 * need to update that for other rules.
636 */
637 if (flags & NL80211_RRF_DFS &&
638 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
639 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
640 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
641 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
642 reg_rule, &i,
643 flags, max_bw);
644 continue;
645 }
646
647 ath11k_dbg(ab, ATH11K_DBG_REG,
648 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
649 i + 1, reg_rule->start_freq, reg_rule->end_freq,
650 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
651 tmp_regd->reg_rules[i].dfs_cac_ms,
652 flags);
653 }
654
655 if (intersect) {
656 default_regd = ab->default_regd[reg_info->phy_id];
657
658 /* Get a new regd by intersecting the received regd with
659 * our default regd.
660 */
661 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
662 kfree(tmp_regd);
663 if (!new_regd) {
664 ath11k_warn(ab, "Unable to create intersected regdomain\n");
665 goto ret;
666 }
667 } else {
668 new_regd = tmp_regd;
669 }
670
671 ret:
672 return new_regd;
673 }
674
ath11k_regd_update_work(struct work_struct * work)675 void ath11k_regd_update_work(struct work_struct *work)
676 {
677 struct ath11k *ar = container_of(work, struct ath11k,
678 regd_update_work);
679 int ret;
680
681 ret = ath11k_regd_update(ar, false);
682 if (ret) {
683 /* Firmware has already moved to the new regd. We need
684 * to maintain channel consistency across FW, Host driver
685 * and userspace. Hence as a fallback mechanism we can set
686 * the prev or default country code to the firmware.
687 */
688 /* TODO: Implement Fallback Mechanism */
689 }
690 }
691
ath11k_reg_init(struct ath11k * ar)692 void ath11k_reg_init(struct ath11k *ar)
693 {
694 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
695 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
696 }
697
ath11k_reg_free(struct ath11k_base * ab)698 void ath11k_reg_free(struct ath11k_base *ab)
699 {
700 int i;
701
702 for (i = 0; i < ab->hw_params.max_radios; i++) {
703 kfree(ab->default_regd[i]);
704 kfree(ab->new_regd[i]);
705 }
706 }
707