1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 */
5 #include <linux/rtnetlink.h>
6
7 #include "core.h"
8 #include "debug.h"
9
10 /* World regdom to be used in case default regd from fw is unavailable */
11 #define ATH11K_2GHZ_CH01_11 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
12 #define ATH11K_5GHZ_5150_5350 REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
13 NL80211_RRF_NO_IR)
14 #define ATH11K_5GHZ_5725_5850 REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
15 NL80211_RRF_NO_IR)
16
17 #define ETSI_WEATHER_RADAR_BAND_LOW 5590
18 #define ETSI_WEATHER_RADAR_BAND_HIGH 5650
19 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT 600000
20
21 static const struct ieee80211_regdomain ath11k_world_regd = {
22 .n_reg_rules = 3,
23 .alpha2 = "00",
24 .reg_rules = {
25 ATH11K_2GHZ_CH01_11,
26 ATH11K_5GHZ_5150_5350,
27 ATH11K_5GHZ_5725_5850,
28 }
29 };
30
ath11k_regdom_changes(struct ath11k * ar,char * alpha2)31 static bool ath11k_regdom_changes(struct ath11k *ar, char *alpha2)
32 {
33 const struct ieee80211_regdomain *regd;
34
35 regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
36 /* This can happen during wiphy registration where the previous
37 * user request is received before we update the regd received
38 * from firmware.
39 */
40 if (!regd)
41 return true;
42
43 return memcmp(regd->alpha2, alpha2, 2) != 0;
44 }
45
46 static void
ath11k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)47 ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
48 {
49 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
50 struct wmi_init_country_params init_country_param;
51 struct wmi_set_current_country_params set_current_param = {};
52 struct ath11k *ar = hw->priv;
53 int ret;
54
55 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
56 "Regulatory Notification received for %s\n", wiphy_name(wiphy));
57
58 /* Currently supporting only General User Hints. Cell base user
59 * hints to be handled later.
60 * Hints from other sources like Core, Beacons are not expected for
61 * self managed wiphy's
62 */
63 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
64 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
65 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
66 return;
67 }
68
69 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
70 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
71 "Country Setting is not allowed\n");
72 return;
73 }
74
75 if (!ath11k_regdom_changes(ar, request->alpha2)) {
76 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
77 return;
78 }
79
80 /* Set the country code to the firmware and will receive
81 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
82 * reg info
83 */
84 if (ar->ab->hw_params.current_cc_support) {
85 memcpy(&set_current_param.alpha2, request->alpha2, 2);
86 memcpy(&ar->alpha2, &set_current_param.alpha2, 2);
87 ret = ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
88 if (ret)
89 ath11k_warn(ar->ab,
90 "failed set current country code: %d\n", ret);
91 } else {
92 init_country_param.flags = ALPHA_IS_SET;
93 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
94 init_country_param.cc_info.alpha2[2] = 0;
95
96 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
97 if (ret)
98 ath11k_warn(ar->ab,
99 "INIT Country code set to fw failed : %d\n", ret);
100 }
101
102 ath11k_mac_11d_scan_stop(ar);
103 ar->regdom_set_by_user = true;
104 }
105
ath11k_reg_update_chan_list(struct ath11k * ar,bool wait)106 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait)
107 {
108 struct ieee80211_supported_band **bands;
109 struct scan_chan_list_params *params;
110 struct ieee80211_channel *channel;
111 struct ieee80211_hw *hw = ar->hw;
112 struct channel_param *ch;
113 enum nl80211_band band;
114 int num_channels = 0;
115 int i, ret, left;
116
117 if (wait && ar->state_11d != ATH11K_11D_IDLE) {
118 left = wait_for_completion_timeout(&ar->completed_11d_scan,
119 ATH11K_SCAN_TIMEOUT_HZ);
120 if (!left) {
121 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
122 "failed to receive 11d scan complete: timed out\n");
123 ar->state_11d = ATH11K_11D_IDLE;
124 }
125 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
126 "11d scan wait left time %d\n", left);
127 }
128
129 if (wait &&
130 (ar->scan.state == ATH11K_SCAN_STARTING ||
131 ar->scan.state == ATH11K_SCAN_RUNNING)) {
132 left = wait_for_completion_timeout(&ar->scan.completed,
133 ATH11K_SCAN_TIMEOUT_HZ);
134 if (!left)
135 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
136 "failed to receive hw scan complete: timed out\n");
137
138 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
139 "hw scan wait left time %d\n", left);
140 }
141
142 if (ar->state == ATH11K_STATE_RESTARTING)
143 return 0;
144
145 bands = hw->wiphy->bands;
146 for (band = 0; band < NUM_NL80211_BANDS; band++) {
147 if (!bands[band])
148 continue;
149
150 for (i = 0; i < bands[band]->n_channels; i++) {
151 if (bands[band]->channels[i].flags &
152 IEEE80211_CHAN_DISABLED)
153 continue;
154
155 num_channels++;
156 }
157 }
158
159 if (WARN_ON(!num_channels))
160 return -EINVAL;
161
162 params = kzalloc(struct_size(params, ch_param, num_channels),
163 GFP_KERNEL);
164 if (!params)
165 return -ENOMEM;
166
167 params->pdev_id = ar->pdev->pdev_id;
168 params->nallchans = num_channels;
169
170 ch = params->ch_param;
171
172 for (band = 0; band < NUM_NL80211_BANDS; band++) {
173 if (!bands[band])
174 continue;
175
176 for (i = 0; i < bands[band]->n_channels; i++) {
177 channel = &bands[band]->channels[i];
178
179 if (channel->flags & IEEE80211_CHAN_DISABLED)
180 continue;
181
182 /* TODO: Set to true/false based on some condition? */
183 ch->allow_ht = true;
184 ch->allow_vht = true;
185 ch->allow_he = true;
186
187 ch->dfs_set =
188 !!(channel->flags & IEEE80211_CHAN_RADAR);
189 ch->is_chan_passive = !!(channel->flags &
190 IEEE80211_CHAN_NO_IR);
191 ch->is_chan_passive |= ch->dfs_set;
192 ch->mhz = channel->center_freq;
193 ch->cfreq1 = channel->center_freq;
194 ch->minpower = 0;
195 ch->maxpower = channel->max_power * 2;
196 ch->maxregpower = channel->max_reg_power * 2;
197 ch->antennamax = channel->max_antenna_gain * 2;
198
199 /* TODO: Use appropriate phymodes */
200 if (channel->band == NL80211_BAND_2GHZ)
201 ch->phy_mode = MODE_11G;
202 else
203 ch->phy_mode = MODE_11A;
204
205 if (channel->band == NL80211_BAND_6GHZ &&
206 cfg80211_channel_is_psc(channel))
207 ch->psc_channel = true;
208
209 ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
210 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
211 i, params->nallchans,
212 ch->mhz, ch->maxpower, ch->maxregpower,
213 ch->antennamax, ch->phy_mode);
214
215 ch++;
216 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
217 * set_agile, reg_class_idx
218 */
219 }
220 }
221
222 ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
223 kfree(params);
224
225 return ret;
226 }
227
228 #if defined(__linux__)
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 #elif defined(__FreeBSD__)
231 static void ath11k_copy_regd(const struct ieee80211_regdomain *regd_orig,
232 #endif
233 struct ieee80211_regdomain *regd_copy)
234 {
235 u8 i;
236
237 /* The caller should have checked error conditions */
238 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
239
240 for (i = 0; i < regd_orig->n_reg_rules; i++)
241 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
242 sizeof(struct ieee80211_reg_rule));
243 }
244
ath11k_regd_update(struct ath11k * ar)245 int ath11k_regd_update(struct ath11k *ar)
246 {
247 #if defined(__linux__)
248 struct ieee80211_regdomain *regd, *regd_copy = NULL;
249 #elif defined(__FreeBSD__)
250 const struct ieee80211_regdomain *regd;
251 struct ieee80211_regdomain *regd_copy = NULL;
252 #endif
253 int ret, regd_len, pdev_id;
254 struct ath11k_base *ab;
255
256 ab = ar->ab;
257 pdev_id = ar->pdev_idx;
258
259 spin_lock_bh(&ab->base_lock);
260
261 /* Prefer the latest regd update over default if it's available */
262 if (ab->new_regd[pdev_id]) {
263 regd = ab->new_regd[pdev_id];
264 } else {
265 /* Apply the regd received during init through
266 * WMI_REG_CHAN_LIST_CC event. In case of failure to
267 * receive the regd, initialize with a default world
268 * regulatory.
269 */
270 if (ab->default_regd[pdev_id]) {
271 regd = ab->default_regd[pdev_id];
272 } else {
273 ath11k_warn(ab,
274 "failed to receive default regd during init\n");
275 #if defined(__linux__)
276 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
277 #elif defined(__FreeBSD__)
278 regd = &ath11k_world_regd;
279 #endif
280 }
281 }
282
283 if (!regd) {
284 ret = -EINVAL;
285 spin_unlock_bh(&ab->base_lock);
286 goto err;
287 }
288
289 regd_len = sizeof(*regd) + (regd->n_reg_rules *
290 sizeof(struct ieee80211_reg_rule));
291
292 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
293 if (regd_copy)
294 ath11k_copy_regd(regd, regd_copy);
295
296 spin_unlock_bh(&ab->base_lock);
297
298 if (!regd_copy) {
299 ret = -ENOMEM;
300 goto err;
301 }
302
303 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
304
305 kfree(regd_copy);
306
307 if (ret)
308 goto err;
309
310 if (ar->state == ATH11K_STATE_ON) {
311 ret = ath11k_reg_update_chan_list(ar, true);
312 if (ret)
313 goto err;
314 }
315
316 return 0;
317 err:
318 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
319 return ret;
320 }
321
322 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)323 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
324 {
325 switch (dfs_region) {
326 case ATH11K_DFS_REG_FCC:
327 case ATH11K_DFS_REG_CN:
328 return NL80211_DFS_FCC;
329 case ATH11K_DFS_REG_ETSI:
330 case ATH11K_DFS_REG_KR:
331 return NL80211_DFS_ETSI;
332 case ATH11K_DFS_REG_MKK:
333 case ATH11K_DFS_REG_MKK_N:
334 return NL80211_DFS_JP;
335 default:
336 return NL80211_DFS_UNSET;
337 }
338 }
339
ath11k_map_fw_reg_flags(u16 reg_flags)340 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
341 {
342 u32 flags = 0;
343
344 if (reg_flags & REGULATORY_CHAN_NO_IR)
345 flags = NL80211_RRF_NO_IR;
346
347 if (reg_flags & REGULATORY_CHAN_RADAR)
348 flags |= NL80211_RRF_DFS;
349
350 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
351 flags |= NL80211_RRF_NO_OFDM;
352
353 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
354 flags |= NL80211_RRF_NO_OUTDOOR;
355
356 if (reg_flags & REGULATORY_CHAN_NO_HT40)
357 flags |= NL80211_RRF_NO_HT40;
358
359 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
360 flags |= NL80211_RRF_NO_80MHZ;
361
362 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
363 flags |= NL80211_RRF_NO_160MHZ;
364
365 return flags;
366 }
367
368 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)369 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
370 struct ieee80211_reg_rule *rule2)
371 {
372 u32 start_freq1, end_freq1;
373 u32 start_freq2, end_freq2;
374
375 start_freq1 = rule1->freq_range.start_freq_khz;
376 start_freq2 = rule2->freq_range.start_freq_khz;
377
378 end_freq1 = rule1->freq_range.end_freq_khz;
379 end_freq2 = rule2->freq_range.end_freq_khz;
380
381 if ((start_freq1 >= start_freq2 &&
382 start_freq1 < end_freq2) ||
383 (start_freq2 > start_freq1 &&
384 start_freq2 < end_freq1))
385 return true;
386
387 /* TODO: Should we restrict intersection feasibility
388 * based on min bandwidth of the intersected region also,
389 * say the intersected rule should have a min bandwidth
390 * of 20MHz?
391 */
392
393 return false;
394 }
395
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)396 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
397 struct ieee80211_reg_rule *rule2,
398 struct ieee80211_reg_rule *new_rule)
399 {
400 u32 start_freq1, end_freq1;
401 u32 start_freq2, end_freq2;
402 u32 freq_diff, max_bw;
403
404 start_freq1 = rule1->freq_range.start_freq_khz;
405 start_freq2 = rule2->freq_range.start_freq_khz;
406
407 end_freq1 = rule1->freq_range.end_freq_khz;
408 end_freq2 = rule2->freq_range.end_freq_khz;
409
410 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
411 start_freq2);
412 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
413
414 freq_diff = new_rule->freq_range.end_freq_khz -
415 new_rule->freq_range.start_freq_khz;
416 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
417 rule2->freq_range.max_bandwidth_khz);
418 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
419
420 new_rule->power_rule.max_antenna_gain =
421 min_t(u32, rule1->power_rule.max_antenna_gain,
422 rule2->power_rule.max_antenna_gain);
423
424 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
425 rule2->power_rule.max_eirp);
426
427 /* Use the flags of both the rules */
428 new_rule->flags = rule1->flags | rule2->flags;
429
430 /* To be safe, lts use the max cac timeout of both rules */
431 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
432 rule2->dfs_cac_ms);
433 }
434
435 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)436 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
437 struct ieee80211_regdomain *curr_regd)
438 {
439 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
440 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
441 struct ieee80211_regdomain *new_regd = NULL;
442 u8 i, j, k;
443
444 num_old_regd_rules = default_regd->n_reg_rules;
445 num_curr_regd_rules = curr_regd->n_reg_rules;
446 num_new_regd_rules = 0;
447
448 /* Find the number of intersecting rules to allocate new regd memory */
449 for (i = 0; i < num_old_regd_rules; i++) {
450 old_rule = default_regd->reg_rules + i;
451 for (j = 0; j < num_curr_regd_rules; j++) {
452 curr_rule = curr_regd->reg_rules + j;
453
454 if (ath11k_reg_can_intersect(old_rule, curr_rule))
455 num_new_regd_rules++;
456 }
457 }
458
459 if (!num_new_regd_rules)
460 return NULL;
461
462 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
463 sizeof(struct ieee80211_reg_rule)),
464 GFP_ATOMIC);
465
466 if (!new_regd)
467 return NULL;
468
469 /* We set the new country and dfs region directly and only trim
470 * the freq, power, antenna gain by intersecting with the
471 * default regdomain. Also MAX of the dfs cac timeout is selected.
472 */
473 new_regd->n_reg_rules = num_new_regd_rules;
474 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
475 new_regd->dfs_region = curr_regd->dfs_region;
476 new_rule = new_regd->reg_rules;
477
478 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
479 old_rule = default_regd->reg_rules + i;
480 for (j = 0; j < num_curr_regd_rules; j++) {
481 curr_rule = curr_regd->reg_rules + j;
482
483 if (ath11k_reg_can_intersect(old_rule, curr_rule))
484 ath11k_reg_intersect_rules(old_rule, curr_rule,
485 (new_rule + k++));
486 }
487 }
488 return new_regd;
489 }
490
491 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)492 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
493 {
494 switch (dfs_region) {
495 case NL80211_DFS_FCC:
496 return "FCC";
497 case NL80211_DFS_ETSI:
498 return "ETSI";
499 case NL80211_DFS_JP:
500 return "JP";
501 default:
502 return "UNSET";
503 }
504 }
505
506 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)507 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
508 {
509 u16 bw;
510
511 if (end_freq <= start_freq)
512 return 0;
513
514 bw = end_freq - start_freq;
515 bw = min_t(u16, bw, max_bw);
516
517 if (bw >= 80 && bw < 160)
518 bw = 80;
519 else if (bw >= 40 && bw < 80)
520 bw = 40;
521 else if (bw >= 20 && bw < 40)
522 bw = 20;
523 else
524 bw = 0;
525
526 return bw;
527 }
528
529 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)530 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
531 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
532 u32 reg_flags)
533 {
534 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
535 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
536 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
537 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
538 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
539 reg_rule->flags = reg_flags;
540 }
541
542 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)543 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
544 struct ieee80211_regdomain *regd,
545 struct cur_reg_rule *reg_rule,
546 u8 *rule_idx, u32 flags, u16 max_bw)
547 {
548 u32 start_freq;
549 u32 end_freq;
550 u16 bw;
551 u8 i;
552
553 i = *rule_idx;
554
555 /* there might be situations when even the input rule must be dropped */
556 i--;
557
558 /* frequencies below weather radar */
559 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
560 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
561 if (bw > 0) {
562 i++;
563
564 ath11k_reg_update_rule(regd->reg_rules + i,
565 reg_rule->start_freq,
566 ETSI_WEATHER_RADAR_BAND_LOW, bw,
567 reg_rule->ant_gain, reg_rule->reg_power,
568 flags);
569
570 ath11k_dbg(ab, ATH11K_DBG_REG,
571 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
572 i + 1, reg_rule->start_freq,
573 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
574 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
575 flags);
576 }
577
578 /* weather radar frequencies */
579 start_freq = max_t(u32, reg_rule->start_freq,
580 ETSI_WEATHER_RADAR_BAND_LOW);
581 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
582
583 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
584 if (bw > 0) {
585 i++;
586
587 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
588 end_freq, bw, reg_rule->ant_gain,
589 reg_rule->reg_power, flags);
590
591 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
592
593 ath11k_dbg(ab, ATH11K_DBG_REG,
594 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
595 i + 1, start_freq, end_freq, bw,
596 reg_rule->ant_gain, reg_rule->reg_power,
597 regd->reg_rules[i].dfs_cac_ms, flags);
598 }
599
600 /* frequencies above weather radar */
601 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
602 reg_rule->end_freq, max_bw);
603 if (bw > 0) {
604 i++;
605
606 ath11k_reg_update_rule(regd->reg_rules + i,
607 ETSI_WEATHER_RADAR_BAND_HIGH,
608 reg_rule->end_freq, bw,
609 reg_rule->ant_gain, reg_rule->reg_power,
610 flags);
611
612 ath11k_dbg(ab, ATH11K_DBG_REG,
613 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
614 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
615 reg_rule->end_freq, bw, reg_rule->ant_gain,
616 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
617 flags);
618 }
619
620 *rule_idx = i;
621 }
622
623 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)624 ath11k_reg_build_regd(struct ath11k_base *ab,
625 struct cur_regulatory_info *reg_info, bool intersect)
626 {
627 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
628 struct cur_reg_rule *reg_rule;
629 u8 i = 0, j = 0, k = 0;
630 u8 num_rules;
631 u16 max_bw;
632 u32 flags;
633 char alpha2[3];
634
635 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
636
637 /* FIXME: Currently taking reg rules for 6 GHz only from Indoor AP mode list.
638 * This can be updated after complete 6 GHz regulatory support is added.
639 */
640 if (reg_info->is_ext_reg_event)
641 num_rules += reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
642
643 if (!num_rules)
644 goto ret;
645
646 /* Add max additional rules to accommodate weather radar band */
647 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
648 num_rules += 2;
649
650 tmp_regd = kzalloc(sizeof(*tmp_regd) +
651 (num_rules * sizeof(struct ieee80211_reg_rule)),
652 GFP_ATOMIC);
653 if (!tmp_regd)
654 goto ret;
655
656 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
657 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
658 alpha2[2] = '\0';
659 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
660
661 ath11k_dbg(ab, ATH11K_DBG_REG,
662 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
663 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
664 reg_info->dfs_region, num_rules);
665 /* Update reg_rules[] below. Firmware is expected to
666 * send these rules in order(2 GHz rules first and then 5 GHz)
667 */
668 for (; i < num_rules; i++) {
669 if (reg_info->num_2ghz_reg_rules &&
670 (i < reg_info->num_2ghz_reg_rules)) {
671 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
672 max_bw = min_t(u16, reg_rule->max_bw,
673 reg_info->max_bw_2ghz);
674 flags = 0;
675 } else if (reg_info->num_5ghz_reg_rules &&
676 (j < reg_info->num_5ghz_reg_rules)) {
677 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
678 max_bw = min_t(u16, reg_rule->max_bw,
679 reg_info->max_bw_5ghz);
680
681 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
682 * BW Auto correction, we can enable this by default
683 * for all 5G rules here. The regulatory core performs
684 * BW correction if required and applies flags as
685 * per other BW rule flags we pass from here
686 */
687 flags = NL80211_RRF_AUTO_BW;
688 } else if (reg_info->is_ext_reg_event &&
689 reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP] &&
690 (k < reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP])) {
691 reg_rule = reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP] +
692 k++;
693 max_bw = min_t(u16, reg_rule->max_bw,
694 reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP]);
695 flags = NL80211_RRF_AUTO_BW;
696 } else {
697 break;
698 }
699
700 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
701
702 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
703 reg_rule->start_freq,
704 reg_rule->end_freq, max_bw,
705 reg_rule->ant_gain, reg_rule->reg_power,
706 flags);
707
708 /* Update dfs cac timeout if the dfs domain is ETSI and the
709 * new rule covers weather radar band.
710 * Default value of '0' corresponds to 60s timeout, so no
711 * need to update that for other rules.
712 */
713 if (flags & NL80211_RRF_DFS &&
714 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
715 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
716 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
717 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
718 reg_rule, &i,
719 flags, max_bw);
720 continue;
721 }
722
723 if (reg_info->is_ext_reg_event) {
724 ath11k_dbg(ab, ATH11K_DBG_REG,
725 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
726 i + 1, reg_rule->start_freq, reg_rule->end_freq,
727 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
728 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
729 reg_rule->psd_flag, reg_rule->psd_eirp);
730 } else {
731 ath11k_dbg(ab, ATH11K_DBG_REG,
732 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
733 i + 1, reg_rule->start_freq, reg_rule->end_freq,
734 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
735 tmp_regd->reg_rules[i].dfs_cac_ms,
736 flags);
737 }
738 }
739
740 tmp_regd->n_reg_rules = i;
741
742 if (intersect) {
743 default_regd = ab->default_regd[reg_info->phy_id];
744
745 /* Get a new regd by intersecting the received regd with
746 * our default regd.
747 */
748 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
749 kfree(tmp_regd);
750 if (!new_regd) {
751 ath11k_warn(ab, "Unable to create intersected regdomain\n");
752 goto ret;
753 }
754 } else {
755 new_regd = tmp_regd;
756 }
757
758 ret:
759 return new_regd;
760 }
761
ath11k_regd_update_work(struct work_struct * work)762 void ath11k_regd_update_work(struct work_struct *work)
763 {
764 struct ath11k *ar = container_of(work, struct ath11k,
765 regd_update_work);
766 int ret;
767
768 ret = ath11k_regd_update(ar);
769 if (ret) {
770 /* Firmware has already moved to the new regd. We need
771 * to maintain channel consistency across FW, Host driver
772 * and userspace. Hence as a fallback mechanism we can set
773 * the prev or default country code to the firmware.
774 */
775 /* TODO: Implement Fallback Mechanism */
776 }
777 }
778
ath11k_reg_init(struct ath11k * ar)779 void ath11k_reg_init(struct ath11k *ar)
780 {
781 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
782 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
783 }
784
ath11k_reg_free(struct ath11k_base * ab)785 void ath11k_reg_free(struct ath11k_base *ab)
786 {
787 int i;
788
789 for (i = 0; i < ab->hw_params.max_radios; i++) {
790 kfree(ab->default_regd[i]);
791 kfree(ab->new_regd[i]);
792 }
793 }
794