1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
4 * Copyright (c) 2021-2025 Qualcomm Innovation Center, Inc. All rights reserved.
5 */
6 #include <linux/rtnetlink.h>
7 #include "core.h"
8 #include "debug.h"
9 #include "mac.h"
10
11 /* World regdom to be used in case default regd from fw is unavailable */
12 #define ATH12K_2GHZ_CH01_11 REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
13 #define ATH12K_5GHZ_5150_5350 REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
14 NL80211_RRF_NO_IR)
15 #define ATH12K_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 ath12k_world_regd = {
23 .n_reg_rules = 3,
24 .alpha2 = "00",
25 .reg_rules = {
26 ATH12K_2GHZ_CH01_11,
27 ATH12K_5GHZ_5150_5350,
28 ATH12K_5GHZ_5725_5850,
29 }
30 };
31
ath12k_regdom_changes(struct ieee80211_hw * hw,char * alpha2)32 static bool ath12k_regdom_changes(struct ieee80211_hw *hw, char *alpha2)
33 {
34 const struct ieee80211_regdomain *regd;
35
36 regd = rcu_dereference_rtnl(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
ath12k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)48 ath12k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
49 {
50 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
51 struct ath12k_wmi_init_country_arg arg;
52 struct wmi_set_current_country_arg current_arg = {};
53 struct ath12k_hw *ah = ath12k_hw_to_ah(hw);
54 struct ath12k *ar = ath12k_ah_to_ar(ah, 0);
55 int ret, i;
56
57 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
58 "Regulatory Notification received for %s\n", wiphy_name(wiphy));
59
60 if (request->initiator == NL80211_REGDOM_SET_BY_DRIVER) {
61 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
62 "driver initiated regd update\n");
63 if (ah->state != ATH12K_HW_STATE_ON)
64 return;
65
66 for_each_ar(ah, ar, i) {
67 ret = ath12k_reg_update_chan_list(ar, true);
68 if (ret && ret != -EINVAL) {
69 ath12k_warn(ar->ab,
70 "failed to update chan list for pdev %u, ret %d\n",
71 i, ret);
72 break;
73 }
74 }
75 return;
76 }
77
78 /* Currently supporting only General User Hints. Cell base user
79 * hints to be handled later.
80 * Hints from other sources like Core, Beacons are not expected for
81 * self managed wiphy's
82 */
83 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
84 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
85 ath12k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
86 return;
87 }
88
89 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
90 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
91 "Country Setting is not allowed\n");
92 return;
93 }
94
95 if (!ath12k_regdom_changes(hw, request->alpha2)) {
96 ath12k_dbg(ar->ab, ATH12K_DBG_REG, "Country is already set\n");
97 return;
98 }
99
100 /* Allow fresh updates to wiphy regd */
101 ah->regd_updated = false;
102
103 /* Send the reg change request to all the radios */
104 for_each_ar(ah, ar, i) {
105 reinit_completion(&ar->regd_update_completed);
106
107 if (ar->ab->hw_params->current_cc_support) {
108 memcpy(¤t_arg.alpha2, request->alpha2, 2);
109 memcpy(&ar->alpha2, ¤t_arg.alpha2, 2);
110 ret = ath12k_wmi_send_set_current_country_cmd(ar, ¤t_arg);
111 if (ret)
112 ath12k_warn(ar->ab,
113 "failed set current country code: %d\n", ret);
114 } else {
115 arg.flags = ALPHA_IS_SET;
116 memcpy(&arg.cc_info.alpha2, request->alpha2, 2);
117 arg.cc_info.alpha2[2] = 0;
118
119 ret = ath12k_wmi_send_init_country_cmd(ar, &arg);
120 if (ret)
121 ath12k_warn(ar->ab,
122 "failed set INIT Country code: %d\n", ret);
123 }
124
125 wiphy_lock(wiphy);
126 ath12k_mac_11d_scan_stop(ar);
127 wiphy_unlock(wiphy);
128
129 ar->regdom_set_by_user = true;
130 }
131 }
132
ath12k_reg_update_chan_list(struct ath12k * ar,bool wait)133 int ath12k_reg_update_chan_list(struct ath12k *ar, bool wait)
134 {
135 struct ieee80211_supported_band **bands;
136 struct ath12k_wmi_scan_chan_list_arg *arg;
137 struct ieee80211_channel *channel;
138 struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
139 struct ath12k_wmi_channel_arg *ch;
140 enum nl80211_band band;
141 int num_channels = 0;
142 int i, ret = 0;
143
144 if (ar->ah->state == ATH12K_HW_STATE_RESTARTING)
145 return 0;
146
147 bands = hw->wiphy->bands;
148 for (band = 0; band < NUM_NL80211_BANDS; band++) {
149 if (!(ar->mac.sbands[band].channels && bands[band]))
150 continue;
151
152 for (i = 0; i < bands[band]->n_channels; i++) {
153 if (bands[band]->channels[i].flags &
154 IEEE80211_CHAN_DISABLED)
155 continue;
156 /* Skip Channels that are not in current radio's range */
157 if (bands[band]->channels[i].center_freq <
158 KHZ_TO_MHZ(ar->freq_range.start_freq) ||
159 bands[band]->channels[i].center_freq >
160 KHZ_TO_MHZ(ar->freq_range.end_freq))
161 continue;
162
163 num_channels++;
164 }
165 }
166
167 if (!num_channels) {
168 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
169 "pdev is not supported for this country\n");
170 return -EINVAL;
171 }
172
173 arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);
174
175 if (!arg)
176 return -ENOMEM;
177
178 arg->pdev_id = ar->pdev->pdev_id;
179 arg->nallchans = num_channels;
180
181 ch = arg->channel;
182
183 for (band = 0; band < NUM_NL80211_BANDS; band++) {
184 if (!(ar->mac.sbands[band].channels && bands[band]))
185 continue;
186
187 for (i = 0; i < bands[band]->n_channels; i++) {
188 channel = &bands[band]->channels[i];
189
190 if (channel->flags & IEEE80211_CHAN_DISABLED)
191 continue;
192
193 /* Skip Channels that are not in current radio's range */
194 if (bands[band]->channels[i].center_freq <
195 KHZ_TO_MHZ(ar->freq_range.start_freq) ||
196 bands[band]->channels[i].center_freq >
197 KHZ_TO_MHZ(ar->freq_range.end_freq))
198 continue;
199
200 /* TODO: Set to true/false based on some condition? */
201 ch->allow_ht = true;
202 ch->allow_vht = true;
203 ch->allow_he = true;
204
205 ch->dfs_set =
206 !!(channel->flags & IEEE80211_CHAN_RADAR);
207 ch->is_chan_passive = !!(channel->flags &
208 IEEE80211_CHAN_NO_IR);
209 ch->is_chan_passive |= ch->dfs_set;
210 ch->mhz = channel->center_freq;
211 ch->cfreq1 = channel->center_freq;
212 ch->minpower = 0;
213 ch->maxpower = channel->max_power * 2;
214 ch->maxregpower = channel->max_reg_power * 2;
215 ch->antennamax = channel->max_antenna_gain * 2;
216
217 /* TODO: Use appropriate phymodes */
218 if (channel->band == NL80211_BAND_2GHZ)
219 ch->phy_mode = MODE_11G;
220 else
221 ch->phy_mode = MODE_11A;
222
223 if (channel->band == NL80211_BAND_6GHZ &&
224 cfg80211_channel_is_psc(channel))
225 ch->psc_channel = true;
226
227 ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
228 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
229 i, arg->nallchans,
230 ch->mhz, ch->maxpower, ch->maxregpower,
231 ch->antennamax, ch->phy_mode);
232
233 ch++;
234 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
235 * set_agile, reg_class_idx
236 */
237 }
238 }
239
240 if (wait) {
241 spin_lock_bh(&ar->data_lock);
242 list_add_tail(&arg->list, &ar->regd_channel_update_queue);
243 spin_unlock_bh(&ar->data_lock);
244
245 queue_work(ar->ab->workqueue, &ar->regd_channel_update_work);
246
247 return 0;
248 }
249
250 ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
251 kfree(arg);
252
253 return ret;
254 }
255
ath12k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)256 static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
257 struct ieee80211_regdomain *regd_copy)
258 {
259 u8 i;
260
261 /* The caller should have checked error conditions */
262 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
263
264 for (i = 0; i < regd_orig->n_reg_rules; i++)
265 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
266 sizeof(struct ieee80211_reg_rule));
267 }
268
ath12k_regd_update(struct ath12k * ar,bool init)269 int ath12k_regd_update(struct ath12k *ar, bool init)
270 {
271 struct ath12k_wmi_hal_reg_capabilities_ext_arg *reg_cap;
272 u32 phy_id, freq_low, freq_high, supported_bands;
273 struct ath12k_hw *ah = ath12k_ar_to_ah(ar);
274 struct ieee80211_hw *hw = ah->hw;
275 struct ieee80211_regdomain *regd, *regd_copy = NULL;
276 int ret, regd_len, pdev_id;
277 struct ath12k_base *ab;
278 long time_left;
279
280 ab = ar->ab;
281
282 time_left = wait_for_completion_timeout(&ar->regd_update_completed,
283 ATH12K_REG_UPDATE_TIMEOUT_HZ);
284 if (time_left == 0) {
285 ath12k_warn(ab, "Timeout while waiting for regulatory update");
286 /* Even though timeout has occurred, still continue since at least boot
287 * time data would be there to process
288 */
289 }
290
291 supported_bands = ar->pdev->cap.supported_bands;
292 reg_cap = &ab->hal_reg_cap[ar->pdev_idx];
293
294 /* Possible that due to reg change, current limits for supported
295 * frequency changed. Update it. As a first step, reset the
296 * previous values and then compute and set the new values.
297 */
298 ar->freq_range.start_freq = 0;
299 ar->freq_range.end_freq = 0;
300
301 if (supported_bands & WMI_HOST_WLAN_2GHZ_CAP) {
302 if (ab->hw_params->single_pdev_only) {
303 phy_id = ar->pdev->cap.band[WMI_HOST_WLAN_2GHZ_CAP].phy_id;
304 reg_cap = &ab->hal_reg_cap[phy_id];
305 }
306
307 freq_low = max(reg_cap->low_2ghz_chan, ab->reg_freq_2ghz.start_freq);
308 freq_high = min(reg_cap->high_2ghz_chan, ab->reg_freq_2ghz.end_freq);
309
310 ath12k_mac_update_freq_range(ar, freq_low, freq_high);
311 }
312
313 if (supported_bands & WMI_HOST_WLAN_5GHZ_CAP && !ar->supports_6ghz) {
314 if (ab->hw_params->single_pdev_only) {
315 phy_id = ar->pdev->cap.band[WMI_HOST_WLAN_5GHZ_CAP].phy_id;
316 reg_cap = &ab->hal_reg_cap[phy_id];
317 }
318
319 freq_low = max(reg_cap->low_5ghz_chan, ab->reg_freq_5ghz.start_freq);
320 freq_high = min(reg_cap->high_5ghz_chan, ab->reg_freq_5ghz.end_freq);
321
322 ath12k_mac_update_freq_range(ar, freq_low, freq_high);
323 }
324
325 if (supported_bands & WMI_HOST_WLAN_5GHZ_CAP && ar->supports_6ghz) {
326 freq_low = max(reg_cap->low_5ghz_chan, ab->reg_freq_6ghz.start_freq);
327 freq_high = min(reg_cap->high_5ghz_chan, ab->reg_freq_6ghz.end_freq);
328
329 ath12k_mac_update_freq_range(ar, freq_low, freq_high);
330 }
331
332 /* If one of the radios within ah has already updated the regd for
333 * the wiphy, then avoid setting regd again
334 */
335 if (ah->regd_updated)
336 return 0;
337
338 /* firmware provides reg rules which are similar for 2 GHz and 5 GHz
339 * pdev but 6 GHz pdev has superset of all rules including rules for
340 * all bands, we prefer 6 GHz pdev's rules to be used for setup of
341 * the wiphy regd.
342 * If 6 GHz pdev was part of the ath12k_hw, wait for the 6 GHz pdev,
343 * else pick the first pdev which calls this function and use its
344 * regd to update global hw regd.
345 * The regd_updated flag set at the end will not allow any further
346 * updates.
347 */
348 if (ah->use_6ghz_regd && !ar->supports_6ghz)
349 return 0;
350
351 pdev_id = ar->pdev_idx;
352
353 spin_lock_bh(&ab->base_lock);
354
355 if (init) {
356 /* Apply the regd received during init through
357 * WMI_REG_CHAN_LIST_CC event. In case of failure to
358 * receive the regd, initialize with a default world
359 * regulatory.
360 */
361 if (ab->default_regd[pdev_id]) {
362 regd = ab->default_regd[pdev_id];
363 } else {
364 ath12k_warn(ab,
365 "failed to receive default regd during init\n");
366 regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
367 }
368 } else {
369 regd = ab->new_regd[pdev_id];
370 }
371
372 if (!regd) {
373 ret = -EINVAL;
374 spin_unlock_bh(&ab->base_lock);
375 goto err;
376 }
377
378 regd_len = sizeof(*regd) + (regd->n_reg_rules *
379 sizeof(struct ieee80211_reg_rule));
380
381 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
382 if (regd_copy)
383 ath12k_copy_regd(regd, regd_copy);
384
385 spin_unlock_bh(&ab->base_lock);
386
387 if (!regd_copy) {
388 ret = -ENOMEM;
389 goto err;
390 }
391
392 ret = regulatory_set_wiphy_regd(hw->wiphy, regd_copy);
393
394 kfree(regd_copy);
395
396 if (ret)
397 goto err;
398
399 if (ah->state != ATH12K_HW_STATE_ON)
400 goto skip;
401
402 ah->regd_updated = true;
403
404 skip:
405 return 0;
406 err:
407 ath12k_warn(ab, "failed to perform regd update : %d\n", ret);
408 return ret;
409 }
410
411 static enum nl80211_dfs_regions
ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)412 ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
413 {
414 switch (dfs_region) {
415 case ATH12K_DFS_REG_FCC:
416 case ATH12K_DFS_REG_CN:
417 return NL80211_DFS_FCC;
418 case ATH12K_DFS_REG_ETSI:
419 case ATH12K_DFS_REG_KR:
420 return NL80211_DFS_ETSI;
421 case ATH12K_DFS_REG_MKK:
422 case ATH12K_DFS_REG_MKK_N:
423 return NL80211_DFS_JP;
424 default:
425 return NL80211_DFS_UNSET;
426 }
427 }
428
ath12k_get_bw_reg_flags(u16 max_bw)429 static u32 ath12k_get_bw_reg_flags(u16 max_bw)
430 {
431 switch (max_bw) {
432 case 20:
433 return NL80211_RRF_NO_HT40 |
434 NL80211_RRF_NO_80MHZ |
435 NL80211_RRF_NO_160MHZ |
436 NL80211_RRF_NO_320MHZ;
437 case 40:
438 return NL80211_RRF_NO_80MHZ |
439 NL80211_RRF_NO_160MHZ |
440 NL80211_RRF_NO_320MHZ;
441 case 80:
442 return NL80211_RRF_NO_160MHZ |
443 NL80211_RRF_NO_320MHZ;
444 case 160:
445 return NL80211_RRF_NO_320MHZ;
446 case 320:
447 default:
448 return 0;
449 }
450 }
451
ath12k_map_fw_reg_flags(u16 reg_flags)452 static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
453 {
454 u32 flags = 0;
455
456 if (reg_flags & REGULATORY_CHAN_NO_IR)
457 flags = NL80211_RRF_NO_IR;
458
459 if (reg_flags & REGULATORY_CHAN_RADAR)
460 flags |= NL80211_RRF_DFS;
461
462 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
463 flags |= NL80211_RRF_NO_OFDM;
464
465 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
466 flags |= NL80211_RRF_NO_OUTDOOR;
467
468 if (reg_flags & REGULATORY_CHAN_NO_HT40)
469 flags |= NL80211_RRF_NO_HT40;
470
471 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
472 flags |= NL80211_RRF_NO_80MHZ;
473
474 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
475 flags |= NL80211_RRF_NO_160MHZ;
476
477 return flags;
478 }
479
ath12k_map_fw_phy_flags(u32 phy_flags)480 static u32 ath12k_map_fw_phy_flags(u32 phy_flags)
481 {
482 u32 flags = 0;
483
484 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11AX)
485 flags |= NL80211_RRF_NO_HE;
486
487 if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11BE)
488 flags |= NL80211_RRF_NO_EHT;
489
490 return flags;
491 }
492
493 static const char *
ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)494 ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
495 {
496 switch (dfs_region) {
497 case NL80211_DFS_FCC:
498 return "FCC";
499 case NL80211_DFS_ETSI:
500 return "ETSI";
501 case NL80211_DFS_JP:
502 return "JP";
503 default:
504 return "UNSET";
505 }
506 }
507
508 static u16
ath12k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)509 ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
510 {
511 u16 bw;
512
513 bw = end_freq - start_freq;
514 bw = min_t(u16, bw, max_bw);
515
516 if (bw >= 80 && bw < 160)
517 bw = 80;
518 else if (bw >= 40 && bw < 80)
519 bw = 40;
520 else if (bw < 40)
521 bw = 20;
522
523 return bw;
524 }
525
526 static void
ath12k_reg_update_rule(struct ieee80211_reg_rule * reg_rule,u32 start_freq,u32 end_freq,u32 bw,u32 ant_gain,u32 reg_pwr,s8 psd,u32 reg_flags)527 ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
528 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
529 s8 psd, u32 reg_flags)
530 {
531 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
532 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
533 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
534 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
535 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
536 reg_rule->psd = psd;
537 reg_rule->flags = reg_flags;
538 }
539
540 static void
ath12k_reg_update_weather_radar_band(struct ath12k_base * ab,struct ieee80211_regdomain * regd,struct ath12k_reg_rule * reg_rule,u8 * rule_idx,u32 flags,u16 max_bw)541 ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
542 struct ieee80211_regdomain *regd,
543 struct ath12k_reg_rule *reg_rule,
544 u8 *rule_idx, u32 flags, u16 max_bw)
545 {
546 u32 end_freq;
547 u16 bw;
548 u8 i;
549
550 i = *rule_idx;
551
552 bw = ath12k_reg_adjust_bw(reg_rule->start_freq,
553 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
554
555 ath12k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
556 ETSI_WEATHER_RADAR_BAND_LOW, bw,
557 reg_rule->ant_gain, reg_rule->reg_power,
558 reg_rule->psd_eirp, flags);
559
560 ath12k_dbg(ab, ATH12K_DBG_REG,
561 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
562 i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
563 bw, reg_rule->ant_gain, reg_rule->reg_power,
564 regd->reg_rules[i].dfs_cac_ms,
565 flags);
566
567 if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
568 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
569 else
570 end_freq = reg_rule->end_freq;
571
572 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
573 max_bw);
574
575 i++;
576
577 ath12k_reg_update_rule(regd->reg_rules + i,
578 ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
579 reg_rule->ant_gain, reg_rule->reg_power,
580 reg_rule->psd_eirp, flags);
581
582 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
583
584 ath12k_dbg(ab, ATH12K_DBG_REG,
585 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
586 i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
587 bw, reg_rule->ant_gain, reg_rule->reg_power,
588 regd->reg_rules[i].dfs_cac_ms,
589 flags);
590
591 if (end_freq == reg_rule->end_freq) {
592 regd->n_reg_rules--;
593 *rule_idx = i;
594 return;
595 }
596
597 bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
598 reg_rule->end_freq, max_bw);
599
600 i++;
601
602 ath12k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
603 reg_rule->end_freq, bw,
604 reg_rule->ant_gain, reg_rule->reg_power,
605 reg_rule->psd_eirp, flags);
606
607 ath12k_dbg(ab, ATH12K_DBG_REG,
608 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
609 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
610 bw, reg_rule->ant_gain, reg_rule->reg_power,
611 regd->reg_rules[i].dfs_cac_ms,
612 flags);
613
614 *rule_idx = i;
615 }
616
ath12k_reg_update_freq_range(struct ath12k_reg_freq * reg_freq,struct ath12k_reg_rule * reg_rule)617 static void ath12k_reg_update_freq_range(struct ath12k_reg_freq *reg_freq,
618 struct ath12k_reg_rule *reg_rule)
619 {
620 if (reg_freq->start_freq > reg_rule->start_freq)
621 reg_freq->start_freq = reg_rule->start_freq;
622
623 if (reg_freq->end_freq < reg_rule->end_freq)
624 reg_freq->end_freq = reg_rule->end_freq;
625 }
626
627 enum wmi_reg_6g_ap_type
ath12k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)628 ath12k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)
629 {
630 switch (power_type) {
631 case IEEE80211_REG_LPI_AP:
632 return WMI_REG_INDOOR_AP;
633 case IEEE80211_REG_SP_AP:
634 return WMI_REG_STD_POWER_AP;
635 case IEEE80211_REG_VLP_AP:
636 return WMI_REG_VLP_AP;
637 default:
638 return WMI_REG_MAX_AP_TYPE;
639 }
640 }
641
642 struct ieee80211_regdomain *
ath12k_reg_build_regd(struct ath12k_base * ab,struct ath12k_reg_info * reg_info,enum wmi_vdev_type vdev_type,enum ieee80211_ap_reg_power power_type)643 ath12k_reg_build_regd(struct ath12k_base *ab,
644 struct ath12k_reg_info *reg_info,
645 enum wmi_vdev_type vdev_type,
646 enum ieee80211_ap_reg_power power_type)
647 {
648 struct ieee80211_regdomain *new_regd = NULL;
649 struct ath12k_reg_rule *reg_rule, *reg_rule_6ghz;
650 u32 flags, reg_6ghz_number, max_bw_6ghz;
651 u8 i = 0, j = 0, k = 0;
652 u8 num_rules;
653 u16 max_bw;
654 char alpha2[3];
655
656 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
657
658 if (reg_info->is_ext_reg_event) {
659 if (vdev_type == WMI_VDEV_TYPE_STA) {
660 enum wmi_reg_6g_ap_type ap_type;
661
662 ap_type = ath12k_reg_ap_pwr_convert(power_type);
663 if (ap_type == WMI_REG_MAX_AP_TYPE)
664 ap_type = WMI_REG_INDOOR_AP;
665
666 reg_6ghz_number = reg_info->num_6g_reg_rules_cl
667 [ap_type][WMI_REG_DEFAULT_CLIENT];
668 if (reg_6ghz_number == 0) {
669 ap_type = WMI_REG_INDOOR_AP;
670 reg_6ghz_number = reg_info->num_6g_reg_rules_cl
671 [ap_type][WMI_REG_DEFAULT_CLIENT];
672 }
673
674 reg_rule_6ghz = reg_info->reg_rules_6g_client_ptr
675 [ap_type][WMI_REG_DEFAULT_CLIENT];
676 max_bw_6ghz = reg_info->max_bw_6g_client
677 [ap_type][WMI_REG_DEFAULT_CLIENT];
678 } else {
679 reg_6ghz_number = reg_info->num_6g_reg_rules_ap
680 [WMI_REG_INDOOR_AP];
681 reg_rule_6ghz =
682 reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP];
683 max_bw_6ghz = reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP];
684 }
685
686 num_rules += reg_6ghz_number;
687 }
688
689 if (!num_rules)
690 goto ret;
691
692 /* Add max additional rules to accommodate weather radar band */
693 if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
694 num_rules += 2;
695
696 new_regd = kzalloc(sizeof(*new_regd) +
697 (num_rules * sizeof(struct ieee80211_reg_rule)),
698 GFP_ATOMIC);
699 if (!new_regd)
700 goto ret;
701
702 memcpy(new_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
703 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
704 alpha2[2] = '\0';
705 new_regd->dfs_region = ath12k_map_fw_dfs_region(reg_info->dfs_region);
706
707 ath12k_dbg(ab, ATH12K_DBG_REG,
708 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
709 alpha2, ath12k_reg_get_regdom_str(new_regd->dfs_region),
710 reg_info->dfs_region, num_rules);
711
712 /* Reset start and end frequency for each band
713 */
714 ab->reg_freq_5ghz.start_freq = INT_MAX;
715 ab->reg_freq_5ghz.end_freq = 0;
716 ab->reg_freq_2ghz.start_freq = INT_MAX;
717 ab->reg_freq_2ghz.end_freq = 0;
718 ab->reg_freq_6ghz.start_freq = INT_MAX;
719 ab->reg_freq_6ghz.end_freq = 0;
720
721 /* Update reg_rules[] below. Firmware is expected to
722 * send these rules in order(2G rules first and then 5G)
723 */
724 for (; i < num_rules; i++) {
725 if (reg_info->num_2g_reg_rules &&
726 (i < reg_info->num_2g_reg_rules)) {
727 reg_rule = reg_info->reg_rules_2g_ptr + i;
728 max_bw = min_t(u16, reg_rule->max_bw,
729 reg_info->max_bw_2g);
730 flags = ath12k_get_bw_reg_flags(reg_info->max_bw_2g);
731 ath12k_reg_update_freq_range(&ab->reg_freq_2ghz, reg_rule);
732 } else if (reg_info->num_5g_reg_rules &&
733 (j < reg_info->num_5g_reg_rules)) {
734 reg_rule = reg_info->reg_rules_5g_ptr + j++;
735 max_bw = min_t(u16, reg_rule->max_bw,
736 reg_info->max_bw_5g);
737
738 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
739 * BW Auto correction, we can enable this by default
740 * for all 5G rules here. The regulatory core performs
741 * BW correction if required and applies flags as
742 * per other BW rule flags we pass from here
743 */
744 flags = NL80211_RRF_AUTO_BW |
745 ath12k_get_bw_reg_flags(reg_info->max_bw_5g);
746 ath12k_reg_update_freq_range(&ab->reg_freq_5ghz, reg_rule);
747 } else if (reg_info->is_ext_reg_event && reg_6ghz_number &&
748 (k < reg_6ghz_number)) {
749 reg_rule = reg_rule_6ghz + k++;
750 max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz);
751 flags = NL80211_RRF_AUTO_BW |
752 ath12k_get_bw_reg_flags(max_bw_6ghz);
753 if (reg_rule->psd_flag)
754 flags |= NL80211_RRF_PSD;
755 ath12k_reg_update_freq_range(&ab->reg_freq_6ghz, reg_rule);
756 } else {
757 break;
758 }
759
760 flags |= ath12k_map_fw_reg_flags(reg_rule->flags);
761 flags |= ath12k_map_fw_phy_flags(reg_info->phybitmap);
762
763 ath12k_reg_update_rule(new_regd->reg_rules + i,
764 reg_rule->start_freq,
765 reg_rule->end_freq, max_bw,
766 reg_rule->ant_gain, reg_rule->reg_power,
767 reg_rule->psd_eirp, flags);
768
769 /* Update dfs cac timeout if the dfs domain is ETSI and the
770 * new rule covers weather radar band.
771 * Default value of '0' corresponds to 60s timeout, so no
772 * need to update that for other rules.
773 */
774 if (flags & NL80211_RRF_DFS &&
775 reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
776 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
777 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
778 ath12k_reg_update_weather_radar_band(ab, new_regd,
779 reg_rule, &i,
780 flags, max_bw);
781 continue;
782 }
783
784 if (reg_info->is_ext_reg_event) {
785 ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
786 i + 1, reg_rule->start_freq, reg_rule->end_freq,
787 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
788 new_regd->reg_rules[i].dfs_cac_ms,
789 flags, reg_rule->psd_flag, reg_rule->psd_eirp);
790 } else {
791 ath12k_dbg(ab, ATH12K_DBG_REG,
792 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
793 i + 1, reg_rule->start_freq, reg_rule->end_freq,
794 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
795 new_regd->reg_rules[i].dfs_cac_ms,
796 flags);
797 }
798 }
799
800 new_regd->n_reg_rules = i;
801 ret:
802 return new_regd;
803 }
804
ath12k_regd_update_chan_list_work(struct work_struct * work)805 void ath12k_regd_update_chan_list_work(struct work_struct *work)
806 {
807 struct ath12k *ar = container_of(work, struct ath12k,
808 regd_channel_update_work);
809 struct ath12k_wmi_scan_chan_list_arg *arg;
810 struct list_head local_update_list;
811 int left;
812
813 INIT_LIST_HEAD(&local_update_list);
814
815 spin_lock_bh(&ar->data_lock);
816 list_splice_tail_init(&ar->regd_channel_update_queue, &local_update_list);
817 spin_unlock_bh(&ar->data_lock);
818
819 while ((arg = list_first_entry_or_null(&local_update_list,
820 struct ath12k_wmi_scan_chan_list_arg,
821 list))) {
822 if (ar->state_11d != ATH12K_11D_IDLE) {
823 left = wait_for_completion_timeout(&ar->completed_11d_scan,
824 ATH12K_SCAN_TIMEOUT_HZ);
825 if (!left) {
826 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
827 "failed to receive 11d scan complete: timed out\n");
828 ar->state_11d = ATH12K_11D_IDLE;
829 }
830
831 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
832 "reg 11d scan wait left time %d\n", left);
833 }
834
835 if ((ar->scan.state == ATH12K_SCAN_STARTING ||
836 ar->scan.state == ATH12K_SCAN_RUNNING)) {
837 left = wait_for_completion_timeout(&ar->scan.completed,
838 ATH12K_SCAN_TIMEOUT_HZ);
839 if (!left)
840 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
841 "failed to receive hw scan complete: timed out\n");
842
843 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
844 "reg hw scan wait left time %d\n", left);
845 }
846
847 ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
848 list_del(&arg->list);
849 kfree(arg);
850 }
851 }
852
ath12k_regd_update_work(struct work_struct * work)853 void ath12k_regd_update_work(struct work_struct *work)
854 {
855 struct ath12k *ar = container_of(work, struct ath12k,
856 regd_update_work);
857 int ret;
858
859 ret = ath12k_regd_update(ar, false);
860 if (ret) {
861 /* Firmware has already moved to the new regd. We need
862 * to maintain channel consistency across FW, Host driver
863 * and userspace. Hence as a fallback mechanism we can set
864 * the prev or default country code to the firmware.
865 */
866 /* TODO: Implement Fallback Mechanism */
867 }
868 }
869
ath12k_reg_reset_reg_info(struct ath12k_reg_info * reg_info)870 void ath12k_reg_reset_reg_info(struct ath12k_reg_info *reg_info)
871 {
872 u8 i, j;
873
874 if (!reg_info)
875 return;
876
877 kfree(reg_info->reg_rules_2g_ptr);
878 kfree(reg_info->reg_rules_5g_ptr);
879
880 if (reg_info->is_ext_reg_event) {
881 for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
882 kfree(reg_info->reg_rules_6g_ap_ptr[i]);
883
884 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
885 kfree(reg_info->reg_rules_6g_client_ptr[i][j]);
886 }
887 }
888 }
889
ath12k_reg_validate_reg_info(struct ath12k_base * ab,struct ath12k_reg_info * reg_info)890 enum ath12k_reg_status ath12k_reg_validate_reg_info(struct ath12k_base *ab,
891 struct ath12k_reg_info *reg_info)
892 {
893 int pdev_idx = reg_info->phy_id;
894
895 if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
896 /* In case of failure to set the requested country,
897 * firmware retains the current regd. We print a failure info
898 * and return from here.
899 */
900 ath12k_warn(ab, "Failed to set the requested Country regulatory setting\n");
901 return ATH12K_REG_STATUS_DROP;
902 }
903
904 if (pdev_idx >= ab->num_radios) {
905 /* Process the event for phy0 only if single_pdev_only
906 * is true. If pdev_idx is valid but not 0, discard the
907 * event. Otherwise, it goes to fallback.
908 */
909 if (ab->hw_params->single_pdev_only &&
910 pdev_idx < ab->hw_params->num_rxdma_per_pdev)
911 return ATH12K_REG_STATUS_DROP;
912 else
913 return ATH12K_REG_STATUS_FALLBACK;
914 }
915
916 /* Avoid multiple overwrites to default regd, during core
917 * stop-start after mac registration.
918 */
919 if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
920 !memcmp(ab->default_regd[pdev_idx]->alpha2,
921 reg_info->alpha2, 2))
922 return ATH12K_REG_STATUS_DROP;
923
924 return ATH12K_REG_STATUS_VALID;
925 }
926
ath12k_reg_handle_chan_list(struct ath12k_base * ab,struct ath12k_reg_info * reg_info,enum wmi_vdev_type vdev_type,enum ieee80211_ap_reg_power power_type)927 int ath12k_reg_handle_chan_list(struct ath12k_base *ab,
928 struct ath12k_reg_info *reg_info,
929 enum wmi_vdev_type vdev_type,
930 enum ieee80211_ap_reg_power power_type)
931 {
932 struct ieee80211_regdomain *regd = NULL;
933 int pdev_idx = reg_info->phy_id;
934 struct ath12k *ar;
935
936 regd = ath12k_reg_build_regd(ab, reg_info, vdev_type, power_type);
937 if (!regd)
938 return -EINVAL;
939
940 spin_lock_bh(&ab->base_lock);
941 if (test_bit(ATH12K_FLAG_REGISTERED, &ab->dev_flags)) {
942 /* Once mac is registered, ar is valid and all CC events from
943 * firmware is considered to be received due to user requests
944 * currently.
945 * Free previously built regd before assigning the newly
946 * generated regd to ar. NULL pointer handling will be
947 * taken care by kfree itself.
948 */
949 ar = ab->pdevs[pdev_idx].ar;
950 kfree(ab->new_regd[pdev_idx]);
951 ab->new_regd[pdev_idx] = regd;
952 queue_work(ab->workqueue, &ar->regd_update_work);
953 } else {
954 /* Multiple events for the same *ar is not expected. But we
955 * can still clear any previously stored default_regd if we
956 * are receiving this event for the same radio by mistake.
957 * NULL pointer handling will be taken care by kfree itself.
958 */
959 kfree(ab->default_regd[pdev_idx]);
960 /* This regd would be applied during mac registration */
961 ab->default_regd[pdev_idx] = regd;
962 }
963 ab->dfs_region = reg_info->dfs_region;
964 spin_unlock_bh(&ab->base_lock);
965
966 return 0;
967 }
968
ath12k_reg_init(struct ieee80211_hw * hw)969 void ath12k_reg_init(struct ieee80211_hw *hw)
970 {
971 hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
972 hw->wiphy->flags |= WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER;
973 hw->wiphy->reg_notifier = ath12k_reg_notifier;
974 }
975
ath12k_reg_free(struct ath12k_base * ab)976 void ath12k_reg_free(struct ath12k_base *ab)
977 {
978 int i;
979
980 mutex_lock(&ab->core_lock);
981 for (i = 0; i < MAX_RADIOS; i++) {
982 ath12k_reg_reset_reg_info(ab->reg_info[i]);
983 kfree(ab->reg_info[i]);
984 ab->reg_info[i] = NULL;
985 }
986
987 for (i = 0; i < ab->hw_params->max_radios; i++) {
988 kfree(ab->default_regd[i]);
989 kfree(ab->new_regd[i]);
990 ab->default_regd[i] = NULL;
991 ab->new_regd[i] = NULL;
992 }
993 mutex_unlock(&ab->core_lock);
994 }
995