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
ath11k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)228 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
229 struct ieee80211_regdomain *regd_copy)
230 {
231 u8 i;
232
233 /* The caller should have checked error conditions */
234 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
235
236 for (i = 0; i < regd_orig->n_reg_rules; i++)
237 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
238 sizeof(struct ieee80211_reg_rule));
239 }
240
ath11k_regd_update(struct ath11k * ar)241 int ath11k_regd_update(struct ath11k *ar)
242 {
243 struct ieee80211_regdomain *regd, *regd_copy = NULL;
244 int ret, regd_len, pdev_id;
245 struct ath11k_base *ab;
246
247 ab = ar->ab;
248 pdev_id = ar->pdev_idx;
249
250 spin_lock_bh(&ab->base_lock);
251
252 /* Prefer the latest regd update over default if it's available */
253 if (ab->new_regd[pdev_id]) {
254 regd = ab->new_regd[pdev_id];
255 } else {
256 /* Apply the regd received during init through
257 * WMI_REG_CHAN_LIST_CC event. In case of failure to
258 * receive the regd, initialize with a default world
259 * regulatory.
260 */
261 if (ab->default_regd[pdev_id]) {
262 regd = ab->default_regd[pdev_id];
263 } else {
264 ath11k_warn(ab,
265 "failed to receive default regd during init\n");
266 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
267 }
268 }
269
270 if (!regd) {
271 ret = -EINVAL;
272 spin_unlock_bh(&ab->base_lock);
273 goto err;
274 }
275
276 regd_len = sizeof(*regd) + (regd->n_reg_rules *
277 sizeof(struct ieee80211_reg_rule));
278
279 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
280 if (regd_copy)
281 ath11k_copy_regd(regd, regd_copy);
282
283 spin_unlock_bh(&ab->base_lock);
284
285 if (!regd_copy) {
286 ret = -ENOMEM;
287 goto err;
288 }
289
290 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
291
292 kfree(regd_copy);
293
294 if (ret)
295 goto err;
296
297 if (ar->state == ATH11K_STATE_ON) {
298 ret = ath11k_reg_update_chan_list(ar, true);
299 if (ret)
300 goto err;
301 }
302
303 return 0;
304 err:
305 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
306 return ret;
307 }
308
309 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)310 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
311 {
312 switch (dfs_region) {
313 case ATH11K_DFS_REG_FCC:
314 case ATH11K_DFS_REG_CN:
315 return NL80211_DFS_FCC;
316 case ATH11K_DFS_REG_ETSI:
317 case ATH11K_DFS_REG_KR:
318 return NL80211_DFS_ETSI;
319 case ATH11K_DFS_REG_MKK:
320 case ATH11K_DFS_REG_MKK_N:
321 return NL80211_DFS_JP;
322 default:
323 return NL80211_DFS_UNSET;
324 }
325 }
326
ath11k_map_fw_reg_flags(u16 reg_flags)327 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
328 {
329 u32 flags = 0;
330
331 if (reg_flags & REGULATORY_CHAN_NO_IR)
332 flags = NL80211_RRF_NO_IR;
333
334 if (reg_flags & REGULATORY_CHAN_RADAR)
335 flags |= NL80211_RRF_DFS;
336
337 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
338 flags |= NL80211_RRF_NO_OFDM;
339
340 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
341 flags |= NL80211_RRF_NO_OUTDOOR;
342
343 if (reg_flags & REGULATORY_CHAN_NO_HT40)
344 flags |= NL80211_RRF_NO_HT40;
345
346 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
347 flags |= NL80211_RRF_NO_80MHZ;
348
349 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
350 flags |= NL80211_RRF_NO_160MHZ;
351
352 return flags;
353 }
354
355 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)356 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
357 struct ieee80211_reg_rule *rule2)
358 {
359 u32 start_freq1, end_freq1;
360 u32 start_freq2, end_freq2;
361
362 start_freq1 = rule1->freq_range.start_freq_khz;
363 start_freq2 = rule2->freq_range.start_freq_khz;
364
365 end_freq1 = rule1->freq_range.end_freq_khz;
366 end_freq2 = rule2->freq_range.end_freq_khz;
367
368 if ((start_freq1 >= start_freq2 &&
369 start_freq1 < end_freq2) ||
370 (start_freq2 > start_freq1 &&
371 start_freq2 < end_freq1))
372 return true;
373
374 /* TODO: Should we restrict intersection feasibility
375 * based on min bandwidth of the intersected region also,
376 * say the intersected rule should have a min bandwidth
377 * of 20MHz?
378 */
379
380 return false;
381 }
382
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)383 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
384 struct ieee80211_reg_rule *rule2,
385 struct ieee80211_reg_rule *new_rule)
386 {
387 u32 start_freq1, end_freq1;
388 u32 start_freq2, end_freq2;
389 u32 freq_diff, max_bw;
390
391 start_freq1 = rule1->freq_range.start_freq_khz;
392 start_freq2 = rule2->freq_range.start_freq_khz;
393
394 end_freq1 = rule1->freq_range.end_freq_khz;
395 end_freq2 = rule2->freq_range.end_freq_khz;
396
397 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
398 start_freq2);
399 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
400
401 freq_diff = new_rule->freq_range.end_freq_khz -
402 new_rule->freq_range.start_freq_khz;
403 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
404 rule2->freq_range.max_bandwidth_khz);
405 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
406
407 new_rule->power_rule.max_antenna_gain =
408 min_t(u32, rule1->power_rule.max_antenna_gain,
409 rule2->power_rule.max_antenna_gain);
410
411 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
412 rule2->power_rule.max_eirp);
413
414 /* Use the flags of both the rules */
415 new_rule->flags = rule1->flags | rule2->flags;
416
417 /* To be safe, lts use the max cac timeout of both rules */
418 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
419 rule2->dfs_cac_ms);
420 }
421
422 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)423 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
424 struct ieee80211_regdomain *curr_regd)
425 {
426 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
427 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
428 struct ieee80211_regdomain *new_regd = NULL;
429 u8 i, j, k;
430
431 num_old_regd_rules = default_regd->n_reg_rules;
432 num_curr_regd_rules = curr_regd->n_reg_rules;
433 num_new_regd_rules = 0;
434
435 /* Find the number of intersecting rules to allocate new regd memory */
436 for (i = 0; i < num_old_regd_rules; i++) {
437 old_rule = default_regd->reg_rules + i;
438 for (j = 0; j < num_curr_regd_rules; j++) {
439 curr_rule = curr_regd->reg_rules + j;
440
441 if (ath11k_reg_can_intersect(old_rule, curr_rule))
442 num_new_regd_rules++;
443 }
444 }
445
446 if (!num_new_regd_rules)
447 return NULL;
448
449 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
450 sizeof(struct ieee80211_reg_rule)),
451 GFP_ATOMIC);
452
453 if (!new_regd)
454 return NULL;
455
456 /* We set the new country and dfs region directly and only trim
457 * the freq, power, antenna gain by intersecting with the
458 * default regdomain. Also MAX of the dfs cac timeout is selected.
459 */
460 new_regd->n_reg_rules = num_new_regd_rules;
461 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
462 new_regd->dfs_region = curr_regd->dfs_region;
463 new_rule = new_regd->reg_rules;
464
465 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
466 old_rule = default_regd->reg_rules + i;
467 for (j = 0; j < num_curr_regd_rules; j++) {
468 curr_rule = curr_regd->reg_rules + j;
469
470 if (ath11k_reg_can_intersect(old_rule, curr_rule))
471 ath11k_reg_intersect_rules(old_rule, curr_rule,
472 (new_rule + k++));
473 }
474 }
475 return new_regd;
476 }
477
478 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)479 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
480 {
481 switch (dfs_region) {
482 case NL80211_DFS_FCC:
483 return "FCC";
484 case NL80211_DFS_ETSI:
485 return "ETSI";
486 case NL80211_DFS_JP:
487 return "JP";
488 default:
489 return "UNSET";
490 }
491 }
492
493 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)494 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
495 {
496 u16 bw;
497
498 if (end_freq <= start_freq)
499 return 0;
500
501 bw = end_freq - start_freq;
502 bw = min_t(u16, bw, max_bw);
503
504 if (bw >= 80 && bw < 160)
505 bw = 80;
506 else if (bw >= 40 && bw < 80)
507 bw = 40;
508 else if (bw >= 20 && bw < 40)
509 bw = 20;
510 else
511 bw = 0;
512
513 return bw;
514 }
515
516 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)517 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
518 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
519 u32 reg_flags)
520 {
521 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
522 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
523 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
524 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
525 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
526 reg_rule->flags = reg_flags;
527 }
528
529 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)530 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
531 struct ieee80211_regdomain *regd,
532 struct cur_reg_rule *reg_rule,
533 u8 *rule_idx, u32 flags, u16 max_bw)
534 {
535 u32 start_freq;
536 u32 end_freq;
537 u16 bw;
538 u8 i;
539
540 i = *rule_idx;
541
542 /* there might be situations when even the input rule must be dropped */
543 i--;
544
545 /* frequencies below weather radar */
546 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
547 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
548 if (bw > 0) {
549 i++;
550
551 ath11k_reg_update_rule(regd->reg_rules + i,
552 reg_rule->start_freq,
553 ETSI_WEATHER_RADAR_BAND_LOW, bw,
554 reg_rule->ant_gain, reg_rule->reg_power,
555 flags);
556
557 ath11k_dbg(ab, ATH11K_DBG_REG,
558 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
559 i + 1, reg_rule->start_freq,
560 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
561 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
562 flags);
563 }
564
565 /* weather radar frequencies */
566 start_freq = max_t(u32, reg_rule->start_freq,
567 ETSI_WEATHER_RADAR_BAND_LOW);
568 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
569
570 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
571 if (bw > 0) {
572 i++;
573
574 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
575 end_freq, bw, reg_rule->ant_gain,
576 reg_rule->reg_power, flags);
577
578 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
579
580 ath11k_dbg(ab, ATH11K_DBG_REG,
581 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
582 i + 1, start_freq, end_freq, bw,
583 reg_rule->ant_gain, reg_rule->reg_power,
584 regd->reg_rules[i].dfs_cac_ms, flags);
585 }
586
587 /* frequencies above weather radar */
588 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
589 reg_rule->end_freq, max_bw);
590 if (bw > 0) {
591 i++;
592
593 ath11k_reg_update_rule(regd->reg_rules + i,
594 ETSI_WEATHER_RADAR_BAND_HIGH,
595 reg_rule->end_freq, bw,
596 reg_rule->ant_gain, reg_rule->reg_power,
597 flags);
598
599 ath11k_dbg(ab, ATH11K_DBG_REG,
600 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
601 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
602 reg_rule->end_freq, bw, reg_rule->ant_gain,
603 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
604 flags);
605 }
606
607 *rule_idx = i;
608 }
609
610 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect)611 ath11k_reg_build_regd(struct ath11k_base *ab,
612 struct cur_regulatory_info *reg_info, bool intersect)
613 {
614 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
615 struct cur_reg_rule *reg_rule;
616 u8 i = 0, j = 0, k = 0;
617 u8 num_rules;
618 u16 max_bw;
619 u32 flags;
620 char alpha2[3];
621
622 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
623
624 /* FIXME: Currently taking reg rules for 6 GHz only from Indoor AP mode list.
625 * This can be updated after complete 6 GHz regulatory support is added.
626 */
627 if (reg_info->is_ext_reg_event)
628 num_rules += reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
629
630 if (!num_rules)
631 goto ret;
632
633 /* Add max additional rules to accommodate weather radar band */
634 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
635 num_rules += 2;
636
637 tmp_regd = kzalloc(sizeof(*tmp_regd) +
638 (num_rules * sizeof(struct ieee80211_reg_rule)),
639 GFP_ATOMIC);
640 if (!tmp_regd)
641 goto ret;
642
643 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
644 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
645 alpha2[2] = '\0';
646 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
647
648 ath11k_dbg(ab, ATH11K_DBG_REG,
649 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
650 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
651 reg_info->dfs_region, num_rules);
652 /* Update reg_rules[] below. Firmware is expected to
653 * send these rules in order(2 GHz rules first and then 5 GHz)
654 */
655 for (; i < num_rules; i++) {
656 if (reg_info->num_2ghz_reg_rules &&
657 (i < reg_info->num_2ghz_reg_rules)) {
658 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
659 max_bw = min_t(u16, reg_rule->max_bw,
660 reg_info->max_bw_2ghz);
661 flags = 0;
662 } else if (reg_info->num_5ghz_reg_rules &&
663 (j < reg_info->num_5ghz_reg_rules)) {
664 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
665 max_bw = min_t(u16, reg_rule->max_bw,
666 reg_info->max_bw_5ghz);
667
668 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
669 * BW Auto correction, we can enable this by default
670 * for all 5G rules here. The regulatory core performs
671 * BW correction if required and applies flags as
672 * per other BW rule flags we pass from here
673 */
674 flags = NL80211_RRF_AUTO_BW;
675 } else if (reg_info->is_ext_reg_event &&
676 reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP] &&
677 (k < reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP])) {
678 reg_rule = reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP] +
679 k++;
680 max_bw = min_t(u16, reg_rule->max_bw,
681 reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP]);
682 flags = NL80211_RRF_AUTO_BW;
683 } else {
684 break;
685 }
686
687 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
688
689 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
690 reg_rule->start_freq,
691 reg_rule->end_freq, max_bw,
692 reg_rule->ant_gain, reg_rule->reg_power,
693 flags);
694
695 /* Update dfs cac timeout if the dfs domain is ETSI and the
696 * new rule covers weather radar band.
697 * Default value of '0' corresponds to 60s timeout, so no
698 * need to update that for other rules.
699 */
700 if (flags & NL80211_RRF_DFS &&
701 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
702 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
703 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
704 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
705 reg_rule, &i,
706 flags, max_bw);
707 continue;
708 }
709
710 if (reg_info->is_ext_reg_event) {
711 ath11k_dbg(ab, ATH11K_DBG_REG,
712 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
713 i + 1, reg_rule->start_freq, reg_rule->end_freq,
714 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
715 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
716 reg_rule->psd_flag, reg_rule->psd_eirp);
717 } else {
718 ath11k_dbg(ab, ATH11K_DBG_REG,
719 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
720 i + 1, reg_rule->start_freq, reg_rule->end_freq,
721 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
722 tmp_regd->reg_rules[i].dfs_cac_ms,
723 flags);
724 }
725 }
726
727 tmp_regd->n_reg_rules = i;
728
729 if (intersect) {
730 default_regd = ab->default_regd[reg_info->phy_id];
731
732 /* Get a new regd by intersecting the received regd with
733 * our default regd.
734 */
735 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
736 kfree(tmp_regd);
737 if (!new_regd) {
738 ath11k_warn(ab, "Unable to create intersected regdomain\n");
739 goto ret;
740 }
741 } else {
742 new_regd = tmp_regd;
743 }
744
745 ret:
746 return new_regd;
747 }
748
ath11k_regd_update_work(struct work_struct * work)749 void ath11k_regd_update_work(struct work_struct *work)
750 {
751 struct ath11k *ar = container_of(work, struct ath11k,
752 regd_update_work);
753 int ret;
754
755 ret = ath11k_regd_update(ar);
756 if (ret) {
757 /* Firmware has already moved to the new regd. We need
758 * to maintain channel consistency across FW, Host driver
759 * and userspace. Hence as a fallback mechanism we can set
760 * the prev or default country code to the firmware.
761 */
762 /* TODO: Implement Fallback Mechanism */
763 }
764 }
765
ath11k_reg_init(struct ath11k * ar)766 void ath11k_reg_init(struct ath11k *ar)
767 {
768 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
769 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
770 }
771
ath11k_reg_free(struct ath11k_base * ab)772 void ath11k_reg_free(struct ath11k_base *ab)
773 {
774 int i;
775
776 for (i = 0; i < ab->hw_params.max_radios; i++) {
777 kfree(ab->default_regd[i]);
778 kfree(ab->new_regd[i]);
779 }
780 }
781