1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2023 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6 #include <linux/rtnetlink.h>
7
8 #include "core.h"
9 #include "debug.h"
10
11 /* World regdom to be used in case default regd from fw is unavailable */
12 #define ATH11K_2GHZ_CH01_11 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
13 #define ATH11K_5GHZ_5150_5350 REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
14 NL80211_RRF_NO_IR)
15 #define ATH11K_5GHZ_5725_5850 REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
16 NL80211_RRF_NO_IR)
17
18 #define ETSI_WEATHER_RADAR_BAND_LOW 5590
19 #define ETSI_WEATHER_RADAR_BAND_HIGH 5650
20 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT 600000
21
22 static const struct ieee80211_regdomain ath11k_world_regd = {
23 .n_reg_rules = 3,
24 .alpha2 = "00",
25 .reg_rules = {
26 ATH11K_2GHZ_CH01_11,
27 ATH11K_5GHZ_5150_5350,
28 ATH11K_5GHZ_5725_5850,
29 }
30 };
31
ath11k_regdom_changes(struct ath11k * ar,char * alpha2)32 static bool ath11k_regdom_changes(struct ath11k *ar, char *alpha2)
33 {
34 const struct ieee80211_regdomain *regd;
35
36 regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
37 /* This can happen during wiphy registration where the previous
38 * user request is received before we update the regd received
39 * from firmware.
40 */
41 if (!regd)
42 return true;
43
44 return memcmp(regd->alpha2, alpha2, 2) != 0;
45 }
46
47 static void
ath11k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)48 ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
49 {
50 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
51 struct wmi_init_country_params init_country_param;
52 struct wmi_set_current_country_params set_current_param = {};
53 struct ath11k *ar = hw->priv;
54 int ret;
55
56 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
57 "Regulatory Notification received for %s\n", wiphy_name(wiphy));
58
59 /* Currently supporting only General User Hints. Cell base user
60 * hints to be handled later.
61 * Hints from other sources like Core, Beacons are not expected for
62 * self managed wiphy's
63 */
64 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
65 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
66 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
67 return;
68 }
69
70 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
71 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
72 "Country Setting is not allowed\n");
73 return;
74 }
75
76 if (!ath11k_regdom_changes(ar, request->alpha2)) {
77 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
78 return;
79 }
80
81 /* Set the country code to the firmware and will receive
82 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
83 * reg info
84 */
85 if (ar->ab->hw_params.current_cc_support) {
86 memcpy(&set_current_param.alpha2, request->alpha2, 2);
87 memcpy(&ar->alpha2, &set_current_param.alpha2, 2);
88 ret = ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
89 if (ret)
90 ath11k_warn(ar->ab,
91 "failed set current country code: %d\n", ret);
92 } else {
93 init_country_param.flags = ALPHA_IS_SET;
94 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
95 init_country_param.cc_info.alpha2[2] = 0;
96
97 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
98 if (ret)
99 ath11k_warn(ar->ab,
100 "INIT Country code set to fw failed : %d\n", ret);
101 }
102
103 ath11k_mac_11d_scan_stop(ar);
104 ar->regdom_set_by_user = true;
105 }
106
ath11k_reg_update_chan_list(struct ath11k * ar,bool wait)107 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait)
108 {
109 struct ieee80211_supported_band **bands;
110 struct scan_chan_list_params *params;
111 struct ieee80211_channel *channel;
112 struct ieee80211_hw *hw = ar->hw;
113 struct channel_param *ch;
114 enum nl80211_band band;
115 int num_channels = 0;
116 int i, ret, left;
117
118 if (wait && ar->state_11d != ATH11K_11D_IDLE) {
119 left = wait_for_completion_timeout(&ar->completed_11d_scan,
120 ATH11K_SCAN_TIMEOUT_HZ);
121 if (!left) {
122 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
123 "failed to receive 11d scan complete: timed out\n");
124 ar->state_11d = ATH11K_11D_IDLE;
125 }
126 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
127 "11d scan wait left time %d\n", left);
128 }
129
130 if (wait &&
131 (ar->scan.state == ATH11K_SCAN_STARTING ||
132 ar->scan.state == ATH11K_SCAN_RUNNING)) {
133 left = wait_for_completion_timeout(&ar->scan.completed,
134 ATH11K_SCAN_TIMEOUT_HZ);
135 if (!left)
136 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
137 "failed to receive hw scan complete: timed out\n");
138
139 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
140 "hw scan wait left time %d\n", left);
141 }
142
143 if (ar->state == ATH11K_STATE_RESTARTING)
144 return 0;
145
146 bands = hw->wiphy->bands;
147 for (band = 0; band < NUM_NL80211_BANDS; band++) {
148 if (!bands[band])
149 continue;
150
151 for (i = 0; i < bands[band]->n_channels; i++) {
152 if (bands[band]->channels[i].flags &
153 IEEE80211_CHAN_DISABLED)
154 continue;
155
156 num_channels++;
157 }
158 }
159
160 if (WARN_ON(!num_channels))
161 return -EINVAL;
162
163 params = kzalloc(struct_size(params, ch_param, num_channels),
164 GFP_KERNEL);
165 if (!params)
166 return -ENOMEM;
167
168 params->pdev_id = ar->pdev->pdev_id;
169 params->nallchans = num_channels;
170
171 ch = params->ch_param;
172
173 for (band = 0; band < NUM_NL80211_BANDS; band++) {
174 if (!bands[band])
175 continue;
176
177 for (i = 0; i < bands[band]->n_channels; i++) {
178 channel = &bands[band]->channels[i];
179
180 if (channel->flags & IEEE80211_CHAN_DISABLED)
181 continue;
182
183 /* TODO: Set to true/false based on some condition? */
184 ch->allow_ht = true;
185 ch->allow_vht = true;
186 ch->allow_he = true;
187
188 ch->dfs_set =
189 !!(channel->flags & IEEE80211_CHAN_RADAR);
190 ch->is_chan_passive = !!(channel->flags &
191 IEEE80211_CHAN_NO_IR);
192 ch->is_chan_passive |= ch->dfs_set;
193 ch->mhz = channel->center_freq;
194 ch->cfreq1 = channel->center_freq;
195 ch->minpower = 0;
196 ch->maxpower = channel->max_power * 2;
197 ch->maxregpower = channel->max_reg_power * 2;
198 ch->antennamax = channel->max_antenna_gain * 2;
199
200 /* TODO: Use appropriate phymodes */
201 if (channel->band == NL80211_BAND_2GHZ)
202 ch->phy_mode = MODE_11G;
203 else
204 ch->phy_mode = MODE_11A;
205
206 if (channel->band == NL80211_BAND_6GHZ &&
207 cfg80211_channel_is_psc(channel))
208 ch->psc_channel = true;
209
210 ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
211 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
212 i, params->nallchans,
213 ch->mhz, ch->maxpower, ch->maxregpower,
214 ch->antennamax, ch->phy_mode);
215
216 ch++;
217 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
218 * set_agile, reg_class_idx
219 */
220 }
221 }
222
223 ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
224 kfree(params);
225
226 return ret;
227 }
228
ath11k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)229 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
230 struct ieee80211_regdomain *regd_copy)
231 {
232 u8 i;
233
234 /* The caller should have checked error conditions */
235 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
236
237 for (i = 0; i < regd_orig->n_reg_rules; i++)
238 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
239 sizeof(struct ieee80211_reg_rule));
240 }
241
ath11k_regd_update(struct ath11k * ar)242 int ath11k_regd_update(struct ath11k *ar)
243 {
244 struct ieee80211_regdomain *regd, *regd_copy = NULL;
245 int ret, regd_len, pdev_id;
246 struct ath11k_base *ab;
247
248 ab = ar->ab;
249 pdev_id = ar->pdev_idx;
250
251 spin_lock_bh(&ab->base_lock);
252
253 /* Prefer the latest regd update over default if it's available */
254 if (ab->new_regd[pdev_id]) {
255 regd = ab->new_regd[pdev_id];
256 } else {
257 /* Apply the regd received during init through
258 * WMI_REG_CHAN_LIST_CC event. In case of failure to
259 * receive the regd, initialize with a default world
260 * regulatory.
261 */
262 if (ab->default_regd[pdev_id]) {
263 regd = ab->default_regd[pdev_id];
264 } else {
265 ath11k_warn(ab,
266 "failed to receive default regd during init\n");
267 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
268 }
269 }
270
271 if (!regd) {
272 ret = -EINVAL;
273 spin_unlock_bh(&ab->base_lock);
274 goto err;
275 }
276
277 regd_len = sizeof(*regd) + (regd->n_reg_rules *
278 sizeof(struct ieee80211_reg_rule));
279
280 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
281 if (regd_copy)
282 ath11k_copy_regd(regd, regd_copy);
283
284 spin_unlock_bh(&ab->base_lock);
285
286 if (!regd_copy) {
287 ret = -ENOMEM;
288 goto err;
289 }
290
291 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
292
293 kfree(regd_copy);
294
295 if (ret)
296 goto err;
297
298 if (ar->state == ATH11K_STATE_ON) {
299 ret = ath11k_reg_update_chan_list(ar, true);
300 if (ret)
301 goto err;
302 }
303
304 return 0;
305 err:
306 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
307 return ret;
308 }
309
310 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)311 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
312 {
313 switch (dfs_region) {
314 case ATH11K_DFS_REG_FCC:
315 case ATH11K_DFS_REG_CN:
316 return NL80211_DFS_FCC;
317 case ATH11K_DFS_REG_ETSI:
318 case ATH11K_DFS_REG_KR:
319 return NL80211_DFS_ETSI;
320 case ATH11K_DFS_REG_MKK:
321 case ATH11K_DFS_REG_MKK_N:
322 return NL80211_DFS_JP;
323 default:
324 return NL80211_DFS_UNSET;
325 }
326 }
327
ath11k_map_fw_reg_flags(u16 reg_flags)328 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
329 {
330 u32 flags = 0;
331
332 if (reg_flags & REGULATORY_CHAN_NO_IR)
333 flags = NL80211_RRF_NO_IR;
334
335 if (reg_flags & REGULATORY_CHAN_RADAR)
336 flags |= NL80211_RRF_DFS;
337
338 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
339 flags |= NL80211_RRF_NO_OFDM;
340
341 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
342 flags |= NL80211_RRF_NO_OUTDOOR;
343
344 if (reg_flags & REGULATORY_CHAN_NO_HT40)
345 flags |= NL80211_RRF_NO_HT40;
346
347 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
348 flags |= NL80211_RRF_NO_80MHZ;
349
350 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
351 flags |= NL80211_RRF_NO_160MHZ;
352
353 return flags;
354 }
355
356 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)357 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
358 struct ieee80211_reg_rule *rule2)
359 {
360 u32 start_freq1, end_freq1;
361 u32 start_freq2, end_freq2;
362
363 start_freq1 = rule1->freq_range.start_freq_khz;
364 start_freq2 = rule2->freq_range.start_freq_khz;
365
366 end_freq1 = rule1->freq_range.end_freq_khz;
367 end_freq2 = rule2->freq_range.end_freq_khz;
368
369 if ((start_freq1 >= start_freq2 &&
370 start_freq1 < end_freq2) ||
371 (start_freq2 > start_freq1 &&
372 start_freq2 < end_freq1))
373 return true;
374
375 /* TODO: Should we restrict intersection feasibility
376 * based on min bandwidth of the intersected region also,
377 * say the intersected rule should have a min bandwidth
378 * of 20MHz?
379 */
380
381 return false;
382 }
383
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)384 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
385 struct ieee80211_reg_rule *rule2,
386 struct ieee80211_reg_rule *new_rule)
387 {
388 u32 start_freq1, end_freq1;
389 u32 start_freq2, end_freq2;
390 u32 freq_diff, max_bw;
391
392 start_freq1 = rule1->freq_range.start_freq_khz;
393 start_freq2 = rule2->freq_range.start_freq_khz;
394
395 end_freq1 = rule1->freq_range.end_freq_khz;
396 end_freq2 = rule2->freq_range.end_freq_khz;
397
398 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
399 start_freq2);
400 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
401
402 freq_diff = new_rule->freq_range.end_freq_khz -
403 new_rule->freq_range.start_freq_khz;
404 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
405 rule2->freq_range.max_bandwidth_khz);
406 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
407
408 new_rule->power_rule.max_antenna_gain =
409 min_t(u32, rule1->power_rule.max_antenna_gain,
410 rule2->power_rule.max_antenna_gain);
411
412 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
413 rule2->power_rule.max_eirp);
414
415 /* Use the flags of both the rules */
416 new_rule->flags = rule1->flags | rule2->flags;
417
418 /* To be safe, lts use the max cac timeout of both rules */
419 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
420 rule2->dfs_cac_ms);
421 }
422
423 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)424 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
425 struct ieee80211_regdomain *curr_regd)
426 {
427 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
428 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
429 struct ieee80211_regdomain *new_regd = NULL;
430 u8 i, j, k;
431
432 num_old_regd_rules = default_regd->n_reg_rules;
433 num_curr_regd_rules = curr_regd->n_reg_rules;
434 num_new_regd_rules = 0;
435
436 /* Find the number of intersecting rules to allocate new regd memory */
437 for (i = 0; i < num_old_regd_rules; i++) {
438 old_rule = default_regd->reg_rules + i;
439 for (j = 0; j < num_curr_regd_rules; j++) {
440 curr_rule = curr_regd->reg_rules + j;
441
442 if (ath11k_reg_can_intersect(old_rule, curr_rule))
443 num_new_regd_rules++;
444 }
445 }
446
447 if (!num_new_regd_rules)
448 return NULL;
449
450 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
451 sizeof(struct ieee80211_reg_rule)),
452 GFP_ATOMIC);
453
454 if (!new_regd)
455 return NULL;
456
457 /* We set the new country and dfs region directly and only trim
458 * the freq, power, antenna gain by intersecting with the
459 * default regdomain. Also MAX of the dfs cac timeout is selected.
460 */
461 new_regd->n_reg_rules = num_new_regd_rules;
462 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
463 new_regd->dfs_region = curr_regd->dfs_region;
464 new_rule = new_regd->reg_rules;
465
466 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
467 old_rule = default_regd->reg_rules + i;
468 for (j = 0; j < num_curr_regd_rules; j++) {
469 curr_rule = curr_regd->reg_rules + j;
470
471 if (ath11k_reg_can_intersect(old_rule, curr_rule))
472 ath11k_reg_intersect_rules(old_rule, curr_rule,
473 (new_rule + k++));
474 }
475 }
476 return new_regd;
477 }
478
479 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)480 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
481 {
482 switch (dfs_region) {
483 case NL80211_DFS_FCC:
484 return "FCC";
485 case NL80211_DFS_ETSI:
486 return "ETSI";
487 case NL80211_DFS_JP:
488 return "JP";
489 default:
490 return "UNSET";
491 }
492 }
493
494 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)495 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
496 {
497 u16 bw;
498
499 if (end_freq <= start_freq)
500 return 0;
501
502 bw = end_freq - start_freq;
503 bw = min_t(u16, bw, max_bw);
504
505 if (bw >= 80 && bw < 160)
506 bw = 80;
507 else if (bw >= 40 && bw < 80)
508 bw = 40;
509 else if (bw >= 20 && bw < 40)
510 bw = 20;
511 else
512 bw = 0;
513
514 return bw;
515 }
516
517 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)518 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
519 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
520 u32 reg_flags)
521 {
522 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
523 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
524 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
525 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
526 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
527 reg_rule->flags = reg_flags;
528 }
529
530 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)531 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
532 struct ieee80211_regdomain *regd,
533 struct cur_reg_rule *reg_rule,
534 u8 *rule_idx, u32 flags, u16 max_bw)
535 {
536 u32 start_freq;
537 u32 end_freq;
538 u16 bw;
539 u8 i;
540
541 i = *rule_idx;
542
543 /* there might be situations when even the input rule must be dropped */
544 i--;
545
546 /* frequencies below weather radar */
547 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
548 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
549 if (bw > 0) {
550 i++;
551
552 ath11k_reg_update_rule(regd->reg_rules + i,
553 reg_rule->start_freq,
554 ETSI_WEATHER_RADAR_BAND_LOW, bw,
555 reg_rule->ant_gain, reg_rule->reg_power,
556 flags);
557
558 ath11k_dbg(ab, ATH11K_DBG_REG,
559 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
560 i + 1, reg_rule->start_freq,
561 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
562 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
563 flags);
564 }
565
566 /* weather radar frequencies */
567 start_freq = max_t(u32, reg_rule->start_freq,
568 ETSI_WEATHER_RADAR_BAND_LOW);
569 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
570
571 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
572 if (bw > 0) {
573 i++;
574
575 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
576 end_freq, bw, reg_rule->ant_gain,
577 reg_rule->reg_power, flags);
578
579 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
580
581 ath11k_dbg(ab, ATH11K_DBG_REG,
582 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
583 i + 1, start_freq, end_freq, bw,
584 reg_rule->ant_gain, reg_rule->reg_power,
585 regd->reg_rules[i].dfs_cac_ms, flags);
586 }
587
588 /* frequencies above weather radar */
589 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
590 reg_rule->end_freq, max_bw);
591 if (bw > 0) {
592 i++;
593
594 ath11k_reg_update_rule(regd->reg_rules + i,
595 ETSI_WEATHER_RADAR_BAND_HIGH,
596 reg_rule->end_freq, bw,
597 reg_rule->ant_gain, reg_rule->reg_power,
598 flags);
599
600 ath11k_dbg(ab, ATH11K_DBG_REG,
601 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
602 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
603 reg_rule->end_freq, bw, reg_rule->ant_gain,
604 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
605 flags);
606 }
607
608 *rule_idx = i;
609 }
610
611 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)612 ath11k_reg_build_regd(struct ath11k_base *ab,
613 struct cur_regulatory_info *reg_info, bool intersect)
614 {
615 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
616 struct cur_reg_rule *reg_rule;
617 u8 i = 0, j = 0, k = 0;
618 u8 num_rules;
619 u16 max_bw;
620 u32 flags;
621 char alpha2[3];
622
623 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
624
625 /* FIXME: Currently taking reg rules for 6 GHz only from Indoor AP mode list.
626 * This can be updated after complete 6 GHz regulatory support is added.
627 */
628 if (reg_info->is_ext_reg_event)
629 num_rules += reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
630
631 if (!num_rules)
632 goto ret;
633
634 /* Add max additional rules to accommodate weather radar band */
635 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
636 num_rules += 2;
637
638 tmp_regd = kzalloc(sizeof(*tmp_regd) +
639 (num_rules * sizeof(struct ieee80211_reg_rule)),
640 GFP_ATOMIC);
641 if (!tmp_regd)
642 goto ret;
643
644 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
645 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
646 alpha2[2] = '\0';
647 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
648
649 ath11k_dbg(ab, ATH11K_DBG_REG,
650 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
651 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
652 reg_info->dfs_region, num_rules);
653 /* Update reg_rules[] below. Firmware is expected to
654 * send these rules in order(2 GHz rules first and then 5 GHz)
655 */
656 for (; i < num_rules; i++) {
657 if (reg_info->num_2ghz_reg_rules &&
658 (i < reg_info->num_2ghz_reg_rules)) {
659 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
660 max_bw = min_t(u16, reg_rule->max_bw,
661 reg_info->max_bw_2ghz);
662 flags = 0;
663 } else if (reg_info->num_5ghz_reg_rules &&
664 (j < reg_info->num_5ghz_reg_rules)) {
665 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
666 max_bw = min_t(u16, reg_rule->max_bw,
667 reg_info->max_bw_5ghz);
668
669 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
670 * BW Auto correction, we can enable this by default
671 * for all 5G rules here. The regulatory core performs
672 * BW correction if required and applies flags as
673 * per other BW rule flags we pass from here
674 */
675 flags = NL80211_RRF_AUTO_BW;
676 } else if (reg_info->is_ext_reg_event &&
677 reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP] &&
678 (k < reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP])) {
679 reg_rule = reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP] +
680 k++;
681 max_bw = min_t(u16, reg_rule->max_bw,
682 reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP]);
683 flags = NL80211_RRF_AUTO_BW;
684 } else {
685 break;
686 }
687
688 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
689
690 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
691 reg_rule->start_freq,
692 reg_rule->end_freq, max_bw,
693 reg_rule->ant_gain, reg_rule->reg_power,
694 flags);
695
696 /* Update dfs cac timeout if the dfs domain is ETSI and the
697 * new rule covers weather radar band.
698 * Default value of '0' corresponds to 60s timeout, so no
699 * need to update that for other rules.
700 */
701 if (flags & NL80211_RRF_DFS &&
702 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
703 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
704 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
705 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
706 reg_rule, &i,
707 flags, max_bw);
708 continue;
709 }
710
711 if (reg_info->is_ext_reg_event) {
712 ath11k_dbg(ab, ATH11K_DBG_REG,
713 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
714 i + 1, reg_rule->start_freq, reg_rule->end_freq,
715 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
716 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
717 reg_rule->psd_flag, reg_rule->psd_eirp);
718 } else {
719 ath11k_dbg(ab, ATH11K_DBG_REG,
720 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
721 i + 1, reg_rule->start_freq, reg_rule->end_freq,
722 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
723 tmp_regd->reg_rules[i].dfs_cac_ms,
724 flags);
725 }
726 }
727
728 tmp_regd->n_reg_rules = i;
729
730 if (intersect) {
731 default_regd = ab->default_regd[reg_info->phy_id];
732
733 /* Get a new regd by intersecting the received regd with
734 * our default regd.
735 */
736 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
737 kfree(tmp_regd);
738 if (!new_regd) {
739 ath11k_warn(ab, "Unable to create intersected regdomain\n");
740 goto ret;
741 }
742 } else {
743 new_regd = tmp_regd;
744 }
745
746 ret:
747 return new_regd;
748 }
749
ath11k_regd_update_work(struct work_struct * work)750 void ath11k_regd_update_work(struct work_struct *work)
751 {
752 struct ath11k *ar = container_of(work, struct ath11k,
753 regd_update_work);
754 int ret;
755
756 ret = ath11k_regd_update(ar);
757 if (ret) {
758 /* Firmware has already moved to the new regd. We need
759 * to maintain channel consistency across FW, Host driver
760 * and userspace. Hence as a fallback mechanism we can set
761 * the prev or default country code to the firmware.
762 */
763 /* TODO: Implement Fallback Mechanism */
764 }
765 }
766
ath11k_reg_init(struct ath11k * ar)767 void ath11k_reg_init(struct ath11k *ar)
768 {
769 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
770 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
771 }
772
ath11k_reg_free(struct ath11k_base * ab)773 void ath11k_reg_free(struct ath11k_base *ab)
774 {
775 int i;
776
777 for (i = 0; i < ab->hw_params.max_radios; i++) {
778 kfree(ab->default_regd[i]);
779 kfree(ab->new_regd[i]);
780 }
781 }
782