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(p: regd->alpha2, q: alpha2, size: 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(ab: ar->ab, fmt: "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, alpha2: 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, param: &set_current_param);
89 if (ret)
90 ath11k_warn(ab: ar->ab,
91 fmt: "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_cc_param: init_country_param);
98 if (ret)
99 ath11k_warn(ab: ar->ab,
100 fmt: "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(x: &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(x: &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(chan: 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, chan_list: params);
224 kfree(objp: 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(&regd_copy->reg_rules[i], &regd_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(lock: &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 fmt: "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(lock: &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(size: regd_len, GFP_ATOMIC);
281 if (regd_copy)
282 ath11k_copy_regd(regd_orig: regd, regd_copy);
283
284 spin_unlock_bh(lock: &ab->base_lock);
285
286 if (!regd_copy) {
287 ret = -ENOMEM;
288 goto err;
289 }
290
291 ret = regulatory_set_wiphy_regd(wiphy: ar->hw->wiphy, rd: regd_copy);
292
293 kfree(objp: 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, wait: true);
300 if (ret)
301 goto err;
302 }
303
304 return 0;
305err:
306 ath11k_warn(ab, fmt: "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 if ((rule1->flags & NL80211_RRF_PSD) && (rule2->flags & NL80211_RRF_PSD))
429 new_rule->psd = min_t(s8, rule1->psd, rule2->psd);
430 else
431 new_rule->flags &= ~NL80211_RRF_PSD;
432
433 /* To be safe, lts use the max cac timeout of both rules */
434 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
435 rule2->dfs_cac_ms);
436}
437
438static struct ieee80211_regdomain *
439ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
440 struct ieee80211_regdomain *curr_regd)
441{
442 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
443 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
444 struct ieee80211_regdomain *new_regd = NULL;
445 u8 i, j, k;
446
447 num_old_regd_rules = default_regd->n_reg_rules;
448 num_curr_regd_rules = curr_regd->n_reg_rules;
449 num_new_regd_rules = 0;
450
451 /* Find the number of intersecting rules to allocate new regd memory */
452 for (i = 0; i < num_old_regd_rules; i++) {
453 old_rule = default_regd->reg_rules + i;
454 for (j = 0; j < num_curr_regd_rules; j++) {
455 curr_rule = curr_regd->reg_rules + j;
456
457 if (ath11k_reg_can_intersect(rule1: old_rule, rule2: curr_rule))
458 num_new_regd_rules++;
459 }
460 }
461
462 if (!num_new_regd_rules)
463 return NULL;
464
465 new_regd = kzalloc(size: sizeof(*new_regd) + (num_new_regd_rules *
466 sizeof(struct ieee80211_reg_rule)),
467 GFP_ATOMIC);
468
469 if (!new_regd)
470 return NULL;
471
472 /* We set the new country and dfs region directly and only trim
473 * the freq, power, antenna gain by intersecting with the
474 * default regdomain. Also MAX of the dfs cac timeout is selected.
475 */
476 new_regd->n_reg_rules = num_new_regd_rules;
477 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
478 new_regd->dfs_region = curr_regd->dfs_region;
479 new_rule = new_regd->reg_rules;
480
481 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
482 old_rule = default_regd->reg_rules + i;
483 for (j = 0; j < num_curr_regd_rules; j++) {
484 curr_rule = curr_regd->reg_rules + j;
485
486 if (ath11k_reg_can_intersect(rule1: old_rule, rule2: curr_rule))
487 ath11k_reg_intersect_rules(rule1: old_rule, rule2: curr_rule,
488 new_rule: (new_rule + k++));
489 }
490 }
491 return new_regd;
492}
493
494static const char *
495ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
496{
497 switch (dfs_region) {
498 case NL80211_DFS_FCC:
499 return "FCC";
500 case NL80211_DFS_ETSI:
501 return "ETSI";
502 case NL80211_DFS_JP:
503 return "JP";
504 default:
505 return "UNSET";
506 }
507}
508
509static u16
510ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
511{
512 u16 bw;
513
514 if (end_freq <= start_freq)
515 return 0;
516
517 bw = end_freq - start_freq;
518 bw = min_t(u16, bw, max_bw);
519
520 if (bw >= 80 && bw < 160)
521 bw = 80;
522 else if (bw >= 40 && bw < 80)
523 bw = 40;
524 else if (bw >= 20 && bw < 40)
525 bw = 20;
526 else
527 bw = 0;
528
529 return bw;
530}
531
532static void
533ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
534 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
535 s8 psd, u32 reg_flags)
536{
537 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
538 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
539 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
540 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
541 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
542 reg_rule->psd = psd;
543 reg_rule->flags = reg_flags;
544}
545
546static void
547ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
548 struct ieee80211_regdomain *regd,
549 struct cur_reg_rule *reg_rule,
550 u8 *rule_idx, u32 flags, u16 max_bw)
551{
552 u32 start_freq;
553 u32 end_freq;
554 u16 bw;
555 u8 i;
556
557 i = *rule_idx;
558
559 /* there might be situations when even the input rule must be dropped */
560 i--;
561
562 /* frequencies below weather radar */
563 bw = ath11k_reg_adjust_bw(start_freq: reg_rule->start_freq,
564 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
565 if (bw > 0) {
566 i++;
567
568 ath11k_reg_update_rule(reg_rule: regd->reg_rules + i,
569 start_freq: reg_rule->start_freq,
570 ETSI_WEATHER_RADAR_BAND_LOW, bw,
571 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
572 psd: reg_rule->psd_eirp, reg_flags: flags);
573
574 ath11k_dbg(ab, ATH11K_DBG_REG,
575 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
576 i + 1, reg_rule->start_freq,
577 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
578 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
579 flags);
580 }
581
582 /* weather radar frequencies */
583 start_freq = max_t(u32, reg_rule->start_freq,
584 ETSI_WEATHER_RADAR_BAND_LOW);
585 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
586
587 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
588 if (bw > 0) {
589 i++;
590
591 ath11k_reg_update_rule(reg_rule: regd->reg_rules + i, start_freq,
592 end_freq, bw, ant_gain: reg_rule->ant_gain,
593 reg_pwr: reg_rule->reg_power, psd: reg_rule->psd_eirp, reg_flags: flags);
594
595 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
596
597 ath11k_dbg(ab, ATH11K_DBG_REG,
598 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
599 i + 1, start_freq, end_freq, bw,
600 reg_rule->ant_gain, reg_rule->reg_power,
601 regd->reg_rules[i].dfs_cac_ms, flags);
602 }
603
604 /* frequencies above weather radar */
605 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
606 end_freq: reg_rule->end_freq, max_bw);
607 if (bw > 0) {
608 i++;
609
610 ath11k_reg_update_rule(reg_rule: regd->reg_rules + i,
611 ETSI_WEATHER_RADAR_BAND_HIGH,
612 end_freq: reg_rule->end_freq, bw,
613 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
614 psd: reg_rule->psd_eirp, reg_flags: flags);
615
616 ath11k_dbg(ab, ATH11K_DBG_REG,
617 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
618 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
619 reg_rule->end_freq, bw, reg_rule->ant_gain,
620 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
621 flags);
622 }
623
624 *rule_idx = i;
625}
626
627enum wmi_reg_6ghz_ap_type
628ath11k_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_STANDARD_POWER_AP;
635 case IEEE80211_REG_VLP_AP:
636 return WMI_REG_VERY_LOW_POWER_AP;
637 default:
638 return WMI_REG_MAX_AP_TYPE;
639 }
640}
641
642struct ieee80211_regdomain *
643ath11k_reg_build_regd(struct ath11k_base *ab,
644 struct cur_regulatory_info *reg_info, bool intersect,
645 enum wmi_vdev_type vdev_type,
646 enum ieee80211_ap_reg_power power_type)
647{
648 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
649 struct cur_reg_rule *reg_rule, *reg_rule_6ghz;
650 u8 i = 0, j = 0, k = 0;
651 u8 num_rules;
652 u16 max_bw;
653 u32 flags, reg_6ghz_number, max_bw_6ghz;
654 char alpha2[3];
655
656 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
657
658 if (reg_info->is_ext_reg_event) {
659 if (vdev_type == WMI_VDEV_TYPE_STA) {
660 enum wmi_reg_6ghz_ap_type ap_type;
661
662 ap_type = ath11k_reg_ap_pwr_convert(power_type);
663
664 if (ap_type == WMI_REG_MAX_AP_TYPE)
665 ap_type = WMI_REG_INDOOR_AP;
666
667 reg_6ghz_number = reg_info->num_6ghz_rules_client
668 [ap_type][WMI_REG_DEFAULT_CLIENT];
669
670 if (reg_6ghz_number == 0) {
671 ap_type = WMI_REG_INDOOR_AP;
672 reg_6ghz_number = reg_info->num_6ghz_rules_client
673 [ap_type][WMI_REG_DEFAULT_CLIENT];
674 }
675
676 reg_rule_6ghz = reg_info->reg_rules_6ghz_client_ptr
677 [ap_type][WMI_REG_DEFAULT_CLIENT];
678 max_bw_6ghz = reg_info->max_bw_6ghz_client
679 [ap_type][WMI_REG_DEFAULT_CLIENT];
680 } else {
681 reg_6ghz_number = reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
682 reg_rule_6ghz =
683 reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP];
684 max_bw_6ghz = reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP];
685 }
686
687 num_rules += reg_6ghz_number;
688 }
689
690 if (!num_rules)
691 goto ret;
692
693 /* Add max additional rules to accommodate weather radar band */
694 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
695 num_rules += 2;
696
697 tmp_regd = kzalloc(size: sizeof(*tmp_regd) +
698 (num_rules * sizeof(struct ieee80211_reg_rule)),
699 GFP_ATOMIC);
700 if (!tmp_regd)
701 goto ret;
702
703 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
704 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
705 alpha2[2] = '\0';
706 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(dfs_region: reg_info->dfs_region);
707
708 ath11k_dbg(ab, ATH11K_DBG_REG,
709 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
710 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
711 reg_info->dfs_region, num_rules);
712 /* Update reg_rules[] below. Firmware is expected to
713 * send these rules in order(2 GHz rules first and then 5 GHz)
714 */
715 for (; i < num_rules; i++) {
716 if (reg_info->num_2ghz_reg_rules &&
717 (i < reg_info->num_2ghz_reg_rules)) {
718 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
719 max_bw = min_t(u16, reg_rule->max_bw,
720 reg_info->max_bw_2ghz);
721 flags = 0;
722 } else if (reg_info->num_5ghz_reg_rules &&
723 (j < reg_info->num_5ghz_reg_rules)) {
724 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
725 max_bw = min_t(u16, reg_rule->max_bw,
726 reg_info->max_bw_5ghz);
727
728 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
729 * BW Auto correction, we can enable this by default
730 * for all 5G rules here. The regulatory core performs
731 * BW correction if required and applies flags as
732 * per other BW rule flags we pass from here
733 */
734 flags = NL80211_RRF_AUTO_BW;
735 } else if (reg_info->is_ext_reg_event && reg_6ghz_number &&
736 k < reg_6ghz_number) {
737 reg_rule = reg_rule_6ghz + k++;
738 max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz);
739 flags = NL80211_RRF_AUTO_BW;
740 if (reg_rule->psd_flag)
741 flags |= NL80211_RRF_PSD;
742 } else {
743 break;
744 }
745
746 flags |= ath11k_map_fw_reg_flags(reg_flags: reg_rule->flags);
747 flags |= ath11k_map_fw_phy_flags(phy_flags: reg_info->phybitmap);
748
749 ath11k_reg_update_rule(reg_rule: tmp_regd->reg_rules + i,
750 start_freq: reg_rule->start_freq,
751 end_freq: reg_rule->end_freq, bw: max_bw,
752 ant_gain: reg_rule->ant_gain, reg_pwr: reg_rule->reg_power,
753 psd: reg_rule->psd_eirp, reg_flags: flags);
754
755 /* Update dfs cac timeout if the dfs domain is ETSI and the
756 * new rule covers weather radar band.
757 * Default value of '0' corresponds to 60s timeout, so no
758 * need to update that for other rules.
759 */
760 if (flags & NL80211_RRF_DFS &&
761 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
762 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
763 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
764 ath11k_reg_update_weather_radar_band(ab, regd: tmp_regd,
765 reg_rule, rule_idx: &i,
766 flags, max_bw);
767 continue;
768 }
769
770 if (reg_info->is_ext_reg_event) {
771 ath11k_dbg(ab, ATH11K_DBG_REG,
772 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
773 i + 1, reg_rule->start_freq, reg_rule->end_freq,
774 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
775 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
776 reg_rule->psd_flag, reg_rule->psd_eirp);
777 } else {
778 ath11k_dbg(ab, ATH11K_DBG_REG,
779 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
780 i + 1, reg_rule->start_freq, reg_rule->end_freq,
781 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
782 tmp_regd->reg_rules[i].dfs_cac_ms,
783 flags);
784 }
785 }
786
787 tmp_regd->n_reg_rules = i;
788
789 if (intersect) {
790 default_regd = ab->default_regd[reg_info->phy_id];
791
792 /* Get a new regd by intersecting the received regd with
793 * our default regd.
794 */
795 new_regd = ath11k_regd_intersect(default_regd, curr_regd: tmp_regd);
796 kfree(objp: tmp_regd);
797 if (!new_regd) {
798 ath11k_warn(ab, fmt: "Unable to create intersected regdomain\n");
799 goto ret;
800 }
801 } else {
802 new_regd = tmp_regd;
803 }
804
805ret:
806 return new_regd;
807}
808
809static bool ath11k_reg_is_world_alpha(char *alpha)
810{
811 if (alpha[0] == '0' && alpha[1] == '0')
812 return true;
813
814 if (alpha[0] == 'n' && alpha[1] == 'a')
815 return true;
816
817 return false;
818}
819
820static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar)
821{
822 struct ath11k_vif *arvif;
823
824 /* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy
825 * and one struct ieee80211_regdomain, so it could only store one group
826 * reg rules. It means multi-interface concurrency in the same ath11k is
827 * not support for the regdomain. So get the vdev type of the first entry
828 * now. After concurrency support for the regdomain, this should change.
829 */
830 arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list);
831 if (arvif)
832 return arvif->vdev_type;
833
834 return WMI_VDEV_TYPE_UNSPEC;
835}
836
837int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
838 struct cur_regulatory_info *reg_info,
839 enum ieee80211_ap_reg_power power_type)
840{
841 struct ieee80211_regdomain *regd;
842 bool intersect = false;
843 int pdev_idx;
844 struct ath11k *ar;
845 enum wmi_vdev_type vdev_type;
846
847 ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list");
848
849 if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
850 /* In case of failure to set the requested ctry,
851 * fw retains the current regd. We print a failure info
852 * and return from here.
853 */
854 ath11k_warn(ab, fmt: "Failed to set the requested Country regulatory setting\n");
855 return -EINVAL;
856 }
857
858 pdev_idx = reg_info->phy_id;
859
860 /* Avoid default reg rule updates sent during FW recovery if
861 * it is already available
862 */
863 spin_lock_bh(lock: &ab->base_lock);
864 if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
865 ab->default_regd[pdev_idx]) {
866 spin_unlock_bh(lock: &ab->base_lock);
867 goto retfail;
868 }
869 spin_unlock_bh(lock: &ab->base_lock);
870
871 if (pdev_idx >= ab->num_radios) {
872 /* Process the event for phy0 only if single_pdev_only
873 * is true. If pdev_idx is valid but not 0, discard the
874 * event. Otherwise, it goes to fallback. In either case
875 * ath11k_reg_reset_info() needs to be called to avoid
876 * memory leak issue.
877 */
878 ath11k_reg_reset_info(reg_info);
879
880 if (ab->hw_params.single_pdev_only &&
881 pdev_idx < ab->hw_params.num_rxmda_per_pdev)
882 return 0;
883 goto fallback;
884 }
885
886 /* Avoid multiple overwrites to default regd, during core
887 * stop-start after mac registration.
888 */
889 if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
890 !memcmp(p: (char *)ab->default_regd[pdev_idx]->alpha2,
891 q: (char *)reg_info->alpha2, size: 2))
892 goto retfail;
893
894 /* Intersect new rules with default regd if a new country setting was
895 * requested, i.e a default regd was already set during initialization
896 * and the regd coming from this event has a valid country info.
897 */
898 if (ab->default_regd[pdev_idx] &&
899 !ath11k_reg_is_world_alpha(alpha: (char *)
900 ab->default_regd[pdev_idx]->alpha2) &&
901 !ath11k_reg_is_world_alpha(alpha: (char *)reg_info->alpha2))
902 intersect = true;
903
904 ar = ab->pdevs[pdev_idx].ar;
905 vdev_type = ath11k_reg_get_ar_vdev_type(ar);
906
907 ath11k_dbg(ab, ATH11K_DBG_WMI,
908 "wmi handle chan list power type %d vdev type %d intersect %d\n",
909 power_type, vdev_type, intersect);
910
911 regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type);
912 if (!regd) {
913 ath11k_warn(ab, fmt: "failed to build regd from reg_info\n");
914 goto fallback;
915 }
916
917 if (power_type == IEEE80211_REG_UNSET_AP) {
918 ath11k_reg_reset_info(reg_info: &ab->reg_info_store[pdev_idx]);
919 ab->reg_info_store[pdev_idx] = *reg_info;
920 }
921
922 spin_lock_bh(lock: &ab->base_lock);
923 if (ab->default_regd[pdev_idx]) {
924 /* The initial rules from FW after WMI Init is to build
925 * the default regd. From then on, any rules updated for
926 * the pdev could be due to user reg changes.
927 * Free previously built regd before assigning the newly
928 * generated regd to ar. NULL pointer handling will be
929 * taken care by kfree itself.
930 */
931 ar = ab->pdevs[pdev_idx].ar;
932 kfree(objp: ab->new_regd[pdev_idx]);
933 ab->new_regd[pdev_idx] = regd;
934 queue_work(wq: ab->workqueue, work: &ar->regd_update_work);
935 } else {
936 /* This regd would be applied during mac registration and is
937 * held constant throughout for regd intersection purpose
938 */
939 ab->default_regd[pdev_idx] = regd;
940 }
941 ab->dfs_region = reg_info->dfs_region;
942 spin_unlock_bh(lock: &ab->base_lock);
943
944 return 0;
945
946fallback:
947 /* Fallback to older reg (by sending previous country setting
948 * again if fw has succeeded and we failed to process here.
949 * The Regdomain should be uniform across driver and fw. Since the
950 * FW has processed the command and sent a success status, we expect
951 * this function to succeed as well. If it doesn't, CTRY needs to be
952 * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent.
953 */
954 /* TODO: This is rare, but still should also be handled */
955 WARN_ON(1);
956
957retfail:
958
959 return -EINVAL;
960}
961
962void ath11k_regd_update_work(struct work_struct *work)
963{
964 struct ath11k *ar = container_of(work, struct ath11k,
965 regd_update_work);
966 int ret;
967
968 ret = ath11k_regd_update(ar);
969 if (ret) {
970 /* Firmware has already moved to the new regd. We need
971 * to maintain channel consistency across FW, Host driver
972 * and userspace. Hence as a fallback mechanism we can set
973 * the prev or default country code to the firmware.
974 */
975 /* TODO: Implement Fallback Mechanism */
976 }
977}
978
979void ath11k_reg_init(struct ath11k *ar)
980{
981 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
982 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
983}
984
985void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info)
986{
987 int i, j;
988
989 if (!reg_info)
990 return;
991
992 kfree(objp: reg_info->reg_rules_2ghz_ptr);
993 kfree(objp: reg_info->reg_rules_5ghz_ptr);
994
995 for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
996 kfree(objp: reg_info->reg_rules_6ghz_ap_ptr[i]);
997
998 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
999 kfree(objp: reg_info->reg_rules_6ghz_client_ptr[i][j]);
1000 }
1001
1002 memset(reg_info, 0, sizeof(*reg_info));
1003}
1004
1005void ath11k_reg_free(struct ath11k_base *ab)
1006{
1007 int i;
1008
1009 for (i = 0; i < ab->num_radios; i++)
1010 ath11k_reg_reset_info(reg_info: &ab->reg_info_store[i]);
1011
1012 kfree(objp: ab->reg_info_store);
1013 ab->reg_info_store = NULL;
1014
1015 for (i = 0; i < ab->hw_params.max_radios; i++) {
1016 kfree(objp: ab->default_regd[i]);
1017 kfree(objp: ab->new_regd[i]);
1018 }
1019}
1020

source code of linux/drivers/net/wireless/ath/ath11k/reg.c