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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
22static 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
32static 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
47static void
48ath11k_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
107int 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
229static 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
242int 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;
305err:
306 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
307 return ret;
308}
309
310static enum nl80211_dfs_regions
311ath11k_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
328static 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
356static u32 ath11k_map_fw_phy_flags(u32 phy_flags)
357{
358 u32 flags = 0;
359
360 if (phy_flags & ATH11K_REG_PHY_BITMAP_NO11AX)
361 flags |= NL80211_RRF_NO_HE;
362
363 return flags;
364}
365
366static bool
367ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
368 struct ieee80211_reg_rule *rule2)
369{
370 u32 start_freq1, end_freq1;
371 u32 start_freq2, end_freq2;
372
373 start_freq1 = rule1->freq_range.start_freq_khz;
374 start_freq2 = rule2->freq_range.start_freq_khz;
375
376 end_freq1 = rule1->freq_range.end_freq_khz;
377 end_freq2 = rule2->freq_range.end_freq_khz;
378
379 if ((start_freq1 >= start_freq2 &&
380 start_freq1 < end_freq2) ||
381 (start_freq2 > start_freq1 &&
382 start_freq2 < end_freq1))
383 return true;
384
385 /* TODO: Should we restrict intersection feasibility
386 * based on min bandwidth of the intersected region also,
387 * say the intersected rule should have a min bandwidth
388 * of 20MHz?
389 */
390
391 return false;
392}
393
394static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
395 struct ieee80211_reg_rule *rule2,
396 struct ieee80211_reg_rule *new_rule)
397{
398 u32 start_freq1, end_freq1;
399 u32 start_freq2, end_freq2;
400 u32 freq_diff, max_bw;
401
402 start_freq1 = rule1->freq_range.start_freq_khz;
403 start_freq2 = rule2->freq_range.start_freq_khz;
404
405 end_freq1 = rule1->freq_range.end_freq_khz;
406 end_freq2 = rule2->freq_range.end_freq_khz;
407
408 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
409 start_freq2);
410 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
411
412 freq_diff = new_rule->freq_range.end_freq_khz -
413 new_rule->freq_range.start_freq_khz;
414 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
415 rule2->freq_range.max_bandwidth_khz);
416 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
417
418 new_rule->power_rule.max_antenna_gain =
419 min_t(u32, rule1->power_rule.max_antenna_gain,
420 rule2->power_rule.max_antenna_gain);
421
422 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
423 rule2->power_rule.max_eirp);
424
425 /* Use the flags of both the rules */
426 new_rule->flags = rule1->flags | rule2->flags;
427
428 /* To be safe, lts use the max cac timeout of both rules */
429 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
430 rule2->dfs_cac_ms);
431}
432
433static struct ieee80211_regdomain *
434ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
435 struct ieee80211_regdomain *curr_regd)
436{
437 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
438 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
439 struct ieee80211_regdomain *new_regd = NULL;
440 u8 i, j, k;
441
442 num_old_regd_rules = default_regd->n_reg_rules;
443 num_curr_regd_rules = curr_regd->n_reg_rules;
444 num_new_regd_rules = 0;
445
446 /* Find the number of intersecting rules to allocate new regd memory */
447 for (i = 0; i < num_old_regd_rules; i++) {
448 old_rule = default_regd->reg_rules + i;
449 for (j = 0; j < num_curr_regd_rules; j++) {
450 curr_rule = curr_regd->reg_rules + j;
451
452 if (ath11k_reg_can_intersect(old_rule, curr_rule))
453 num_new_regd_rules++;
454 }
455 }
456
457 if (!num_new_regd_rules)
458 return NULL;
459
460 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
461 sizeof(struct ieee80211_reg_rule)),
462 GFP_ATOMIC);
463
464 if (!new_regd)
465 return NULL;
466
467 /* We set the new country and dfs region directly and only trim
468 * the freq, power, antenna gain by intersecting with the
469 * default regdomain. Also MAX of the dfs cac timeout is selected.
470 */
471 new_regd->n_reg_rules = num_new_regd_rules;
472 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
473 new_regd->dfs_region = curr_regd->dfs_region;
474 new_rule = new_regd->reg_rules;
475
476 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
477 old_rule = default_regd->reg_rules + i;
478 for (j = 0; j < num_curr_regd_rules; j++) {
479 curr_rule = curr_regd->reg_rules + j;
480
481 if (ath11k_reg_can_intersect(old_rule, curr_rule))
482 ath11k_reg_intersect_rules(old_rule, curr_rule,
483 (new_rule + k++));
484 }
485 }
486 return new_regd;
487}
488
489static const char *
490ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
491{
492 switch (dfs_region) {
493 case NL80211_DFS_FCC:
494 return "FCC";
495 case NL80211_DFS_ETSI:
496 return "ETSI";
497 case NL80211_DFS_JP:
498 return "JP";
499 default:
500 return "UNSET";
501 }
502}
503
504static u16
505ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
506{
507 u16 bw;
508
509 if (end_freq <= start_freq)
510 return 0;
511
512 bw = end_freq - start_freq;
513 bw = min_t(u16, bw, max_bw);
514
515 if (bw >= 80 && bw < 160)
516 bw = 80;
517 else if (bw >= 40 && bw < 80)
518 bw = 40;
519 else if (bw >= 20 && bw < 40)
520 bw = 20;
521 else
522 bw = 0;
523
524 return bw;
525}
526
527static void
528ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
529 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
530 u32 reg_flags)
531{
532 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
533 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
534 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
535 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
536 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
537 reg_rule->flags = reg_flags;
538}
539
540static void
541ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
542 struct ieee80211_regdomain *regd,
543 struct cur_reg_rule *reg_rule,
544 u8 *rule_idx, u32 flags, u16 max_bw)
545{
546 u32 start_freq;
547 u32 end_freq;
548 u16 bw;
549 u8 i;
550
551 i = *rule_idx;
552
553 /* there might be situations when even the input rule must be dropped */
554 i--;
555
556 /* frequencies below weather radar */
557 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
558 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
559 if (bw > 0) {
560 i++;
561
562 ath11k_reg_update_rule(regd->reg_rules + i,
563 reg_rule->start_freq,
564 ETSI_WEATHER_RADAR_BAND_LOW, bw,
565 reg_rule->ant_gain, reg_rule->reg_power,
566 flags);
567
568 ath11k_dbg(ab, ATH11K_DBG_REG,
569 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
570 i + 1, reg_rule->start_freq,
571 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
572 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
573 flags);
574 }
575
576 /* weather radar frequencies */
577 start_freq = max_t(u32, reg_rule->start_freq,
578 ETSI_WEATHER_RADAR_BAND_LOW);
579 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
580
581 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
582 if (bw > 0) {
583 i++;
584
585 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
586 end_freq, bw, reg_rule->ant_gain,
587 reg_rule->reg_power, flags);
588
589 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
590
591 ath11k_dbg(ab, ATH11K_DBG_REG,
592 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
593 i + 1, start_freq, end_freq, bw,
594 reg_rule->ant_gain, reg_rule->reg_power,
595 regd->reg_rules[i].dfs_cac_ms, flags);
596 }
597
598 /* frequencies above weather radar */
599 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
600 reg_rule->end_freq, max_bw);
601 if (bw > 0) {
602 i++;
603
604 ath11k_reg_update_rule(regd->reg_rules + i,
605 ETSI_WEATHER_RADAR_BAND_HIGH,
606 reg_rule->end_freq, bw,
607 reg_rule->ant_gain, reg_rule->reg_power,
608 flags);
609
610 ath11k_dbg(ab, ATH11K_DBG_REG,
611 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
612 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
613 reg_rule->end_freq, bw, reg_rule->ant_gain,
614 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
615 flags);
616 }
617
618 *rule_idx = i;
619}
620
621struct ieee80211_regdomain *
622ath11k_reg_build_regd(struct ath11k_base *ab,
623 struct cur_regulatory_info *reg_info, bool intersect)
624{
625 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
626 struct cur_reg_rule *reg_rule;
627 u8 i = 0, j = 0, k = 0;
628 u8 num_rules;
629 u16 max_bw;
630 u32 flags;
631 char alpha2[3];
632
633 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
634
635 /* FIXME: Currently taking reg rules for 6 GHz only from Indoor AP mode list.
636 * This can be updated after complete 6 GHz regulatory support is added.
637 */
638 if (reg_info->is_ext_reg_event)
639 num_rules += reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
640
641 if (!num_rules)
642 goto ret;
643
644 /* Add max additional rules to accommodate weather radar band */
645 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
646 num_rules += 2;
647
648 tmp_regd = kzalloc(sizeof(*tmp_regd) +
649 (num_rules * sizeof(struct ieee80211_reg_rule)),
650 GFP_ATOMIC);
651 if (!tmp_regd)
652 goto ret;
653
654 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
655 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
656 alpha2[2] = '\0';
657 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
658
659 ath11k_dbg(ab, ATH11K_DBG_REG,
660 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
661 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
662 reg_info->dfs_region, num_rules);
663 /* Update reg_rules[] below. Firmware is expected to
664 * send these rules in order(2 GHz rules first and then 5 GHz)
665 */
666 for (; i < num_rules; i++) {
667 if (reg_info->num_2ghz_reg_rules &&
668 (i < reg_info->num_2ghz_reg_rules)) {
669 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
670 max_bw = min_t(u16, reg_rule->max_bw,
671 reg_info->max_bw_2ghz);
672 flags = 0;
673 } else if (reg_info->num_5ghz_reg_rules &&
674 (j < reg_info->num_5ghz_reg_rules)) {
675 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
676 max_bw = min_t(u16, reg_rule->max_bw,
677 reg_info->max_bw_5ghz);
678
679 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
680 * BW Auto correction, we can enable this by default
681 * for all 5G rules here. The regulatory core performs
682 * BW correction if required and applies flags as
683 * per other BW rule flags we pass from here
684 */
685 flags = NL80211_RRF_AUTO_BW;
686 } else if (reg_info->is_ext_reg_event &&
687 reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP] &&
688 (k < reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP])) {
689 reg_rule = reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP] +
690 k++;
691 max_bw = min_t(u16, reg_rule->max_bw,
692 reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP]);
693 flags = NL80211_RRF_AUTO_BW;
694 } else {
695 break;
696 }
697
698 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
699 flags |= ath11k_map_fw_phy_flags(reg_info->phybitmap);
700
701 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
702 reg_rule->start_freq,
703 reg_rule->end_freq, max_bw,
704 reg_rule->ant_gain, reg_rule->reg_power,
705 flags);
706
707 /* Update dfs cac timeout if the dfs domain is ETSI and the
708 * new rule covers weather radar band.
709 * Default value of '0' corresponds to 60s timeout, so no
710 * need to update that for other rules.
711 */
712 if (flags & NL80211_RRF_DFS &&
713 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
714 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
715 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
716 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
717 reg_rule, &i,
718 flags, max_bw);
719 continue;
720 }
721
722 if (reg_info->is_ext_reg_event) {
723 ath11k_dbg(ab, ATH11K_DBG_REG,
724 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
725 i + 1, reg_rule->start_freq, reg_rule->end_freq,
726 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
727 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
728 reg_rule->psd_flag, reg_rule->psd_eirp);
729 } else {
730 ath11k_dbg(ab, ATH11K_DBG_REG,
731 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
732 i + 1, reg_rule->start_freq, reg_rule->end_freq,
733 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
734 tmp_regd->reg_rules[i].dfs_cac_ms,
735 flags);
736 }
737 }
738
739 tmp_regd->n_reg_rules = i;
740
741 if (intersect) {
742 default_regd = ab->default_regd[reg_info->phy_id];
743
744 /* Get a new regd by intersecting the received regd with
745 * our default regd.
746 */
747 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
748 kfree(tmp_regd);
749 if (!new_regd) {
750 ath11k_warn(ab, "Unable to create intersected regdomain\n");
751 goto ret;
752 }
753 } else {
754 new_regd = tmp_regd;
755 }
756
757ret:
758 return new_regd;
759}
760
761void ath11k_regd_update_work(struct work_struct *work)
762{
763 struct ath11k *ar = container_of(work, struct ath11k,
764 regd_update_work);
765 int ret;
766
767 ret = ath11k_regd_update(ar);
768 if (ret) {
769 /* Firmware has already moved to the new regd. We need
770 * to maintain channel consistency across FW, Host driver
771 * and userspace. Hence as a fallback mechanism we can set
772 * the prev or default country code to the firmware.
773 */
774 /* TODO: Implement Fallback Mechanism */
775 }
776}
777
778void ath11k_reg_init(struct ath11k *ar)
779{
780 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
781 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
782}
783
784void ath11k_reg_free(struct ath11k_base *ab)
785{
786 int i;
787
788 for (i = 0; i < ab->hw_params.max_radios; i++) {
789 kfree(ab->default_regd[i]);
790 kfree(ab->new_regd[i]);
791 }
792}
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
21static 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
31static 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
46static void
47ath11k_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
106int 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 "reg 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 "reg 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
228static 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
241int 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;
304err:
305 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
306 return ret;
307}
308
309static enum nl80211_dfs_regions
310ath11k_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
327static 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
355static bool
356ath11k_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
383static 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
422static struct ieee80211_regdomain *
423ath11k_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
478static const char *
479ath11k_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
493static u16
494ath11k_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
516static void
517ath11k_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
529static void
530ath11k_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
610struct ieee80211_regdomain *
611ath11k_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;
617 u8 num_rules;
618 u16 max_bw;
619 u32 flags;
620 char alpha2[3];
621
622 num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
623
624 if (!num_rules)
625 goto ret;
626
627 /* Add max additional rules to accommodate weather radar band */
628 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
629 num_rules += 2;
630
631 tmp_regd = kzalloc(sizeof(*tmp_regd) +
632 (num_rules * sizeof(struct ieee80211_reg_rule)),
633 GFP_ATOMIC);
634 if (!tmp_regd)
635 goto ret;
636
637 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
638 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
639 alpha2[2] = '\0';
640 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
641
642 ath11k_dbg(ab, ATH11K_DBG_REG,
643 "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
644 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
645 reg_info->dfs_region, num_rules);
646 /* Update reg_rules[] below. Firmware is expected to
647 * send these rules in order(2G rules first and then 5G)
648 */
649 for (; i < num_rules; i++) {
650 if (reg_info->num_2g_reg_rules &&
651 (i < reg_info->num_2g_reg_rules)) {
652 reg_rule = reg_info->reg_rules_2g_ptr + i;
653 max_bw = min_t(u16, reg_rule->max_bw,
654 reg_info->max_bw_2g);
655 flags = 0;
656 } else if (reg_info->num_5g_reg_rules &&
657 (j < reg_info->num_5g_reg_rules)) {
658 reg_rule = reg_info->reg_rules_5g_ptr + j++;
659 max_bw = min_t(u16, reg_rule->max_bw,
660 reg_info->max_bw_5g);
661
662 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
663 * BW Auto correction, we can enable this by default
664 * for all 5G rules here. The regulatory core performs
665 * BW correction if required and applies flags as
666 * per other BW rule flags we pass from here
667 */
668 flags = NL80211_RRF_AUTO_BW;
669 } else {
670 break;
671 }
672
673 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
674
675 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
676 reg_rule->start_freq,
677 reg_rule->end_freq, max_bw,
678 reg_rule->ant_gain, reg_rule->reg_power,
679 flags);
680
681 /* Update dfs cac timeout if the dfs domain is ETSI and the
682 * new rule covers weather radar band.
683 * Default value of '0' corresponds to 60s timeout, so no
684 * need to update that for other rules.
685 */
686 if (flags & NL80211_RRF_DFS &&
687 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
688 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
689 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
690 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
691 reg_rule, &i,
692 flags, max_bw);
693 continue;
694 }
695
696 ath11k_dbg(ab, ATH11K_DBG_REG,
697 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
698 i + 1, reg_rule->start_freq, reg_rule->end_freq,
699 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
700 tmp_regd->reg_rules[i].dfs_cac_ms,
701 flags);
702 }
703
704 tmp_regd->n_reg_rules = i;
705
706 if (intersect) {
707 default_regd = ab->default_regd[reg_info->phy_id];
708
709 /* Get a new regd by intersecting the received regd with
710 * our default regd.
711 */
712 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
713 kfree(tmp_regd);
714 if (!new_regd) {
715 ath11k_warn(ab, "Unable to create intersected regdomain\n");
716 goto ret;
717 }
718 } else {
719 new_regd = tmp_regd;
720 }
721
722ret:
723 return new_regd;
724}
725
726void ath11k_regd_update_work(struct work_struct *work)
727{
728 struct ath11k *ar = container_of(work, struct ath11k,
729 regd_update_work);
730 int ret;
731
732 ret = ath11k_regd_update(ar);
733 if (ret) {
734 /* Firmware has already moved to the new regd. We need
735 * to maintain channel consistency across FW, Host driver
736 * and userspace. Hence as a fallback mechanism we can set
737 * the prev or default country code to the firmware.
738 */
739 /* TODO: Implement Fallback Mechanism */
740 }
741}
742
743void ath11k_reg_init(struct ath11k *ar)
744{
745 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
746 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
747}
748
749void ath11k_reg_free(struct ath11k_base *ab)
750{
751 int i;
752
753 for (i = 0; i < ab->hw_params.max_radios; i++) {
754 kfree(ab->default_regd[i]);
755 kfree(ab->new_regd[i]);
756 }
757}