1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
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
22 static 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
ath11k_regdom_changes(struct ath11k * ar,char * alpha2)32 static 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
47 static void
ath11k_reg_notifier(struct wiphy * wiphy,struct regulatory_request * request)48 ath11k_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 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 if (request->initiator == NL80211_REGDOM_SET_BY_DRIVER) {
59 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
60 "driver initiated regd update\n");
61 if (ar->state != ATH11K_STATE_ON)
62 return;
63
64 ret = ath11k_reg_update_chan_list(ar, true);
65 if (ret)
66 ath11k_warn(ar->ab, "failed to update channel list: %d\n", ret);
67
68 return;
69 }
70
71 /* Currently supporting only General User Hints. Cell base user
72 * hints to be handled later.
73 * Hints from other sources like Core, Beacons are not expected for
74 * self managed wiphy's
75 */
76 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
77 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
78 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
79 return;
80 }
81
82 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
83 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
84 "Country Setting is not allowed\n");
85 return;
86 }
87
88 if (!ath11k_regdom_changes(ar, request->alpha2)) {
89 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
90 return;
91 }
92
93 /* Set the country code to the firmware and will receive
94 * the WMI_REG_CHAN_LIST_CC EVENT for updating the
95 * reg info
96 */
97 if (ar->ab->hw_params.current_cc_support) {
98 memcpy(&ar->alpha2, request->alpha2, 2);
99 ret = ath11k_reg_set_cc(ar);
100 if (ret)
101 ath11k_warn(ar->ab,
102 "failed set current country code: %d\n", ret);
103 } else {
104 init_country_param.flags = ALPHA_IS_SET;
105 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
106 init_country_param.cc_info.alpha2[2] = 0;
107
108 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
109 if (ret)
110 ath11k_warn(ar->ab,
111 "INIT Country code set to fw failed : %d\n", ret);
112 }
113
114 ath11k_mac_11d_scan_stop(ar);
115 ar->regdom_set_by_user = true;
116 }
117
ath11k_reg_update_chan_list(struct ath11k * ar,bool wait)118 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait)
119 {
120 struct ieee80211_supported_band **bands;
121 struct scan_chan_list_params *params;
122 struct ieee80211_channel *channel;
123 struct ieee80211_hw *hw = ar->hw;
124 struct channel_param *ch;
125 enum nl80211_band band;
126 int num_channels = 0;
127 int i, ret = 0;
128
129 if (ar->state == ATH11K_STATE_RESTARTING)
130 return 0;
131
132 bands = hw->wiphy->bands;
133 for (band = 0; band < NUM_NL80211_BANDS; band++) {
134 if (!bands[band])
135 continue;
136
137 for (i = 0; i < bands[band]->n_channels; i++) {
138 if (bands[band]->channels[i].flags &
139 IEEE80211_CHAN_DISABLED)
140 continue;
141
142 num_channels++;
143 }
144 }
145
146 if (WARN_ON(!num_channels))
147 return -EINVAL;
148
149 params = kzalloc_flex(*params, ch_param, num_channels);
150 if (!params)
151 return -ENOMEM;
152
153 params->pdev_id = ar->pdev->pdev_id;
154 params->nallchans = num_channels;
155
156 ch = params->ch_param;
157
158 for (band = 0; band < NUM_NL80211_BANDS; band++) {
159 if (!bands[band])
160 continue;
161
162 for (i = 0; i < bands[band]->n_channels; i++) {
163 channel = &bands[band]->channels[i];
164
165 if (channel->flags & IEEE80211_CHAN_DISABLED)
166 continue;
167
168 /* TODO: Set to true/false based on some condition? */
169 ch->allow_ht = true;
170 ch->allow_vht = true;
171 ch->allow_he = true;
172
173 ch->dfs_set =
174 !!(channel->flags & IEEE80211_CHAN_RADAR);
175 ch->is_chan_passive = !!(channel->flags &
176 IEEE80211_CHAN_NO_IR);
177 ch->is_chan_passive |= ch->dfs_set;
178 ch->mhz = channel->center_freq;
179 ch->cfreq1 = channel->center_freq;
180 ch->minpower = 0;
181 ch->maxpower = channel->max_power * 2;
182 ch->maxregpower = channel->max_reg_power * 2;
183 ch->antennamax = channel->max_antenna_gain * 2;
184
185 /* TODO: Use appropriate phymodes */
186 if (channel->band == NL80211_BAND_2GHZ)
187 ch->phy_mode = MODE_11G;
188 else
189 ch->phy_mode = MODE_11A;
190
191 if (channel->band == NL80211_BAND_6GHZ &&
192 cfg80211_channel_is_psc(channel))
193 ch->psc_channel = true;
194
195 ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
196 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
197 i, params->nallchans,
198 ch->mhz, ch->maxpower, ch->maxregpower,
199 ch->antennamax, ch->phy_mode);
200
201 ch++;
202 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
203 * set_agile, reg_class_idx
204 */
205 }
206 }
207
208 if (wait) {
209 spin_lock_bh(&ar->data_lock);
210 list_add_tail(¶ms->list, &ar->channel_update_queue);
211 spin_unlock_bh(&ar->data_lock);
212
213 queue_work(ar->ab->workqueue, &ar->channel_update_work);
214
215 return 0;
216 }
217
218 ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
219 kfree(params);
220
221 return ret;
222 }
223
ath11k_copy_regd(struct ieee80211_regdomain * regd_orig,struct ieee80211_regdomain * regd_copy)224 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
225 struct ieee80211_regdomain *regd_copy)
226 {
227 u8 i;
228
229 /* The caller should have checked error conditions */
230 memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
231
232 for (i = 0; i < regd_orig->n_reg_rules; i++)
233 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i],
234 sizeof(struct ieee80211_reg_rule));
235 }
236
ath11k_regd_update(struct ath11k * ar)237 int ath11k_regd_update(struct ath11k *ar)
238 {
239 struct ieee80211_regdomain *regd, *regd_copy = NULL;
240 int ret, regd_len, pdev_id;
241 struct ath11k_base *ab;
242
243 ab = ar->ab;
244 pdev_id = ar->pdev_idx;
245
246 spin_lock_bh(&ab->base_lock);
247
248 /* Prefer the latest regd update over default if it's available */
249 if (ab->new_regd[pdev_id]) {
250 regd = ab->new_regd[pdev_id];
251 } else {
252 /* Apply the regd received during init through
253 * WMI_REG_CHAN_LIST_CC event. In case of failure to
254 * receive the regd, initialize with a default world
255 * regulatory.
256 */
257 if (ab->default_regd[pdev_id]) {
258 regd = ab->default_regd[pdev_id];
259 } else {
260 ath11k_warn(ab,
261 "failed to receive default regd during init\n");
262 regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
263 }
264 }
265
266 if (!regd) {
267 ret = -EINVAL;
268 spin_unlock_bh(&ab->base_lock);
269 goto err;
270 }
271
272 regd_len = sizeof(*regd) + (regd->n_reg_rules *
273 sizeof(struct ieee80211_reg_rule));
274
275 regd_copy = kzalloc(regd_len, GFP_ATOMIC);
276 if (regd_copy)
277 ath11k_copy_regd(regd, regd_copy);
278
279 spin_unlock_bh(&ab->base_lock);
280
281 if (!regd_copy) {
282 ret = -ENOMEM;
283 goto err;
284 }
285
286 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
287
288 kfree(regd_copy);
289
290 if (ret)
291 goto err;
292
293 return 0;
294 err:
295 ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
296 return ret;
297 }
298
299 static enum nl80211_dfs_regions
ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)300 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
301 {
302 switch (dfs_region) {
303 case ATH11K_DFS_REG_FCC:
304 case ATH11K_DFS_REG_CN:
305 return NL80211_DFS_FCC;
306 case ATH11K_DFS_REG_ETSI:
307 case ATH11K_DFS_REG_KR:
308 return NL80211_DFS_ETSI;
309 case ATH11K_DFS_REG_MKK:
310 case ATH11K_DFS_REG_MKK_N:
311 return NL80211_DFS_JP;
312 default:
313 return NL80211_DFS_UNSET;
314 }
315 }
316
ath11k_map_fw_reg_flags(u16 reg_flags)317 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
318 {
319 u32 flags = 0;
320
321 if (reg_flags & REGULATORY_CHAN_NO_IR)
322 flags = NL80211_RRF_NO_IR;
323
324 if (reg_flags & REGULATORY_CHAN_RADAR)
325 flags |= NL80211_RRF_DFS;
326
327 if (reg_flags & REGULATORY_CHAN_NO_OFDM)
328 flags |= NL80211_RRF_NO_OFDM;
329
330 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
331 flags |= NL80211_RRF_NO_OUTDOOR;
332
333 if (reg_flags & REGULATORY_CHAN_NO_HT40)
334 flags |= NL80211_RRF_NO_HT40;
335
336 if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
337 flags |= NL80211_RRF_NO_80MHZ;
338
339 if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
340 flags |= NL80211_RRF_NO_160MHZ;
341
342 return flags;
343 }
344
ath11k_map_fw_phy_flags(u32 phy_flags)345 static u32 ath11k_map_fw_phy_flags(u32 phy_flags)
346 {
347 u32 flags = 0;
348
349 if (phy_flags & ATH11K_REG_PHY_BITMAP_NO11AX)
350 flags |= NL80211_RRF_NO_HE;
351
352 return flags;
353 }
354
355 static bool
ath11k_reg_can_intersect(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2)356 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
357 struct ieee80211_reg_rule *rule2)
358 {
359 u32 start_freq1, end_freq1;
360 u32 start_freq2, end_freq2;
361
362 start_freq1 = rule1->freq_range.start_freq_khz;
363 start_freq2 = rule2->freq_range.start_freq_khz;
364
365 end_freq1 = rule1->freq_range.end_freq_khz;
366 end_freq2 = rule2->freq_range.end_freq_khz;
367
368 if ((start_freq1 >= start_freq2 &&
369 start_freq1 < end_freq2) ||
370 (start_freq2 > start_freq1 &&
371 start_freq2 < end_freq1))
372 return true;
373
374 /* TODO: Should we restrict intersection feasibility
375 * based on min bandwidth of the intersected region also,
376 * say the intersected rule should have a min bandwidth
377 * of 20MHz?
378 */
379
380 return false;
381 }
382
ath11k_reg_intersect_rules(struct ieee80211_reg_rule * rule1,struct ieee80211_reg_rule * rule2,struct ieee80211_reg_rule * new_rule)383 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
384 struct ieee80211_reg_rule *rule2,
385 struct ieee80211_reg_rule *new_rule)
386 {
387 u32 start_freq1, end_freq1;
388 u32 start_freq2, end_freq2;
389 u32 freq_diff, max_bw;
390
391 start_freq1 = rule1->freq_range.start_freq_khz;
392 start_freq2 = rule2->freq_range.start_freq_khz;
393
394 end_freq1 = rule1->freq_range.end_freq_khz;
395 end_freq2 = rule2->freq_range.end_freq_khz;
396
397 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
398 start_freq2);
399 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
400
401 freq_diff = new_rule->freq_range.end_freq_khz -
402 new_rule->freq_range.start_freq_khz;
403 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
404 rule2->freq_range.max_bandwidth_khz);
405 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
406
407 new_rule->power_rule.max_antenna_gain =
408 min_t(u32, rule1->power_rule.max_antenna_gain,
409 rule2->power_rule.max_antenna_gain);
410
411 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
412 rule2->power_rule.max_eirp);
413
414 /* Use the flags of both the rules */
415 new_rule->flags = rule1->flags | rule2->flags;
416
417 if ((rule1->flags & NL80211_RRF_PSD) && (rule2->flags & NL80211_RRF_PSD))
418 new_rule->psd = min_t(s8, rule1->psd, rule2->psd);
419 else
420 new_rule->flags &= ~NL80211_RRF_PSD;
421
422 /* To be safe, lts use the max cac timeout of both rules */
423 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
424 rule2->dfs_cac_ms);
425 }
426
427 static struct ieee80211_regdomain *
ath11k_regd_intersect(struct ieee80211_regdomain * default_regd,struct ieee80211_regdomain * curr_regd)428 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
429 struct ieee80211_regdomain *curr_regd)
430 {
431 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
432 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
433 struct ieee80211_regdomain *new_regd = NULL;
434 u8 i, j, k;
435
436 num_old_regd_rules = default_regd->n_reg_rules;
437 num_curr_regd_rules = curr_regd->n_reg_rules;
438 num_new_regd_rules = 0;
439
440 /* Find the number of intersecting rules to allocate new regd memory */
441 for (i = 0; i < num_old_regd_rules; i++) {
442 old_rule = default_regd->reg_rules + i;
443 for (j = 0; j < num_curr_regd_rules; j++) {
444 curr_rule = curr_regd->reg_rules + j;
445
446 if (ath11k_reg_can_intersect(old_rule, curr_rule))
447 num_new_regd_rules++;
448 }
449 }
450
451 if (!num_new_regd_rules)
452 return NULL;
453
454 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
455 sizeof(struct ieee80211_reg_rule)),
456 GFP_ATOMIC);
457
458 if (!new_regd)
459 return NULL;
460
461 /* We set the new country and dfs region directly and only trim
462 * the freq, power, antenna gain by intersecting with the
463 * default regdomain. Also MAX of the dfs cac timeout is selected.
464 */
465 new_regd->n_reg_rules = num_new_regd_rules;
466 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
467 new_regd->dfs_region = curr_regd->dfs_region;
468 new_rule = new_regd->reg_rules;
469
470 for (i = 0, k = 0; i < num_old_regd_rules; i++) {
471 old_rule = default_regd->reg_rules + i;
472 for (j = 0; j < num_curr_regd_rules; j++) {
473 curr_rule = curr_regd->reg_rules + j;
474
475 if (ath11k_reg_can_intersect(old_rule, curr_rule))
476 ath11k_reg_intersect_rules(old_rule, curr_rule,
477 (new_rule + k++));
478 }
479 }
480 return new_regd;
481 }
482
483 static const char *
ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)484 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
485 {
486 switch (dfs_region) {
487 case NL80211_DFS_FCC:
488 return "FCC";
489 case NL80211_DFS_ETSI:
490 return "ETSI";
491 case NL80211_DFS_JP:
492 return "JP";
493 default:
494 return "UNSET";
495 }
496 }
497
498 static u16
ath11k_reg_adjust_bw(u16 start_freq,u16 end_freq,u16 max_bw)499 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
500 {
501 u16 bw;
502
503 if (end_freq <= start_freq)
504 return 0;
505
506 bw = end_freq - start_freq;
507 bw = min_t(u16, bw, max_bw);
508
509 if (bw >= 80 && bw < 160)
510 bw = 80;
511 else if (bw >= 40 && bw < 80)
512 bw = 40;
513 else if (bw >= 20 && bw < 40)
514 bw = 20;
515 else
516 bw = 0;
517
518 return bw;
519 }
520
521 static void
ath11k_reg_update_rule(struct ieee80211_reg_rule * reg_rule,u32 start_freq,u32 end_freq,u32 bw,u32 ant_gain,u32 reg_pwr,s8 psd,u32 reg_flags)522 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
523 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
524 s8 psd, u32 reg_flags)
525 {
526 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
527 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
528 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
529 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
530 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
531 reg_rule->psd = psd;
532 reg_rule->flags = reg_flags;
533 }
534
535 static void
ath11k_reg_update_weather_radar_band(struct ath11k_base * ab,struct ieee80211_regdomain * regd,struct cur_reg_rule * reg_rule,u8 * rule_idx,u32 flags,u16 max_bw)536 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
537 struct ieee80211_regdomain *regd,
538 struct cur_reg_rule *reg_rule,
539 u8 *rule_idx, u32 flags, u16 max_bw)
540 {
541 u32 start_freq;
542 u32 end_freq;
543 u16 bw;
544 u8 i;
545
546 i = *rule_idx;
547
548 /* there might be situations when even the input rule must be dropped */
549 i--;
550
551 /* frequencies below weather radar */
552 bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
553 ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
554 if (bw > 0) {
555 i++;
556
557 ath11k_reg_update_rule(regd->reg_rules + i,
558 reg_rule->start_freq,
559 ETSI_WEATHER_RADAR_BAND_LOW, bw,
560 reg_rule->ant_gain, reg_rule->reg_power,
561 reg_rule->psd_eirp, flags);
562
563 ath11k_dbg(ab, ATH11K_DBG_REG,
564 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
565 i + 1, reg_rule->start_freq,
566 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
567 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
568 flags);
569 }
570
571 /* weather radar frequencies */
572 start_freq = max_t(u32, reg_rule->start_freq,
573 ETSI_WEATHER_RADAR_BAND_LOW);
574 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
575
576 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
577 if (bw > 0) {
578 i++;
579
580 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
581 end_freq, bw, reg_rule->ant_gain,
582 reg_rule->reg_power, reg_rule->psd_eirp, flags);
583
584 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
585
586 ath11k_dbg(ab, ATH11K_DBG_REG,
587 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
588 i + 1, start_freq, end_freq, bw,
589 reg_rule->ant_gain, reg_rule->reg_power,
590 regd->reg_rules[i].dfs_cac_ms, flags);
591 }
592
593 /* frequencies above weather radar */
594 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
595 reg_rule->end_freq, max_bw);
596 if (bw > 0) {
597 i++;
598
599 ath11k_reg_update_rule(regd->reg_rules + i,
600 ETSI_WEATHER_RADAR_BAND_HIGH,
601 reg_rule->end_freq, bw,
602 reg_rule->ant_gain, reg_rule->reg_power,
603 reg_rule->psd_eirp, flags);
604
605 ath11k_dbg(ab, ATH11K_DBG_REG,
606 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
607 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
608 reg_rule->end_freq, bw, reg_rule->ant_gain,
609 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
610 flags);
611 }
612
613 *rule_idx = i;
614 }
615
616 enum wmi_reg_6ghz_ap_type
ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)617 ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)
618 {
619 switch (power_type) {
620 case IEEE80211_REG_LPI_AP:
621 return WMI_REG_INDOOR_AP;
622 case IEEE80211_REG_SP_AP:
623 return WMI_REG_STANDARD_POWER_AP;
624 case IEEE80211_REG_VLP_AP:
625 return WMI_REG_VERY_LOW_POWER_AP;
626 default:
627 return WMI_REG_MAX_AP_TYPE;
628 }
629 }
630
631 struct ieee80211_regdomain *
ath11k_reg_build_regd(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,bool intersect,enum wmi_vdev_type vdev_type,enum ieee80211_ap_reg_power power_type)632 ath11k_reg_build_regd(struct ath11k_base *ab,
633 struct cur_regulatory_info *reg_info, bool intersect,
634 enum wmi_vdev_type vdev_type,
635 enum ieee80211_ap_reg_power power_type)
636 {
637 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
638 struct cur_reg_rule *reg_rule, *reg_rule_6ghz;
639 u8 i = 0, j = 0, k = 0;
640 u8 num_rules;
641 u16 max_bw;
642 u32 flags, reg_6ghz_number, max_bw_6ghz;
643 char alpha2[3];
644
645 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
646
647 if (reg_info->is_ext_reg_event) {
648 if (vdev_type == WMI_VDEV_TYPE_STA) {
649 enum wmi_reg_6ghz_ap_type ap_type;
650
651 ap_type = ath11k_reg_ap_pwr_convert(power_type);
652
653 if (ap_type == WMI_REG_MAX_AP_TYPE)
654 ap_type = WMI_REG_INDOOR_AP;
655
656 reg_6ghz_number = reg_info->num_6ghz_rules_client
657 [ap_type][WMI_REG_DEFAULT_CLIENT];
658
659 if (reg_6ghz_number == 0) {
660 ap_type = WMI_REG_INDOOR_AP;
661 reg_6ghz_number = reg_info->num_6ghz_rules_client
662 [ap_type][WMI_REG_DEFAULT_CLIENT];
663 }
664
665 reg_rule_6ghz = reg_info->reg_rules_6ghz_client_ptr
666 [ap_type][WMI_REG_DEFAULT_CLIENT];
667 max_bw_6ghz = reg_info->max_bw_6ghz_client
668 [ap_type][WMI_REG_DEFAULT_CLIENT];
669 } else {
670 reg_6ghz_number = reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
671 reg_rule_6ghz =
672 reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP];
673 max_bw_6ghz = reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP];
674 }
675
676 num_rules += reg_6ghz_number;
677 }
678
679 if (!num_rules)
680 goto ret;
681
682 /* Add max additional rules to accommodate weather radar band */
683 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
684 num_rules += 2;
685
686 tmp_regd = kzalloc(sizeof(*tmp_regd) +
687 (num_rules * sizeof(struct ieee80211_reg_rule)),
688 GFP_ATOMIC);
689 if (!tmp_regd)
690 goto ret;
691
692 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
693 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
694 alpha2[2] = '\0';
695 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
696
697 ath11k_dbg(ab, ATH11K_DBG_REG,
698 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
699 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
700 reg_info->dfs_region, num_rules);
701 /* Update reg_rules[] below. Firmware is expected to
702 * send these rules in order(2 GHz rules first and then 5 GHz)
703 */
704 for (; i < num_rules; i++) {
705 if (reg_info->num_2ghz_reg_rules &&
706 (i < reg_info->num_2ghz_reg_rules)) {
707 reg_rule = reg_info->reg_rules_2ghz_ptr + i;
708 max_bw = min_t(u16, reg_rule->max_bw,
709 reg_info->max_bw_2ghz);
710 flags = 0;
711 } else if (reg_info->num_5ghz_reg_rules &&
712 (j < reg_info->num_5ghz_reg_rules)) {
713 reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
714 max_bw = min_t(u16, reg_rule->max_bw,
715 reg_info->max_bw_5ghz);
716
717 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
718 * BW Auto correction, we can enable this by default
719 * for all 5G rules here. The regulatory core performs
720 * BW correction if required and applies flags as
721 * per other BW rule flags we pass from here
722 */
723 flags = NL80211_RRF_AUTO_BW;
724 } else if (reg_info->is_ext_reg_event && reg_6ghz_number &&
725 k < reg_6ghz_number) {
726 reg_rule = reg_rule_6ghz + k++;
727 max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz);
728 flags = NL80211_RRF_AUTO_BW;
729 if (reg_rule->psd_flag)
730 flags |= NL80211_RRF_PSD;
731 } else {
732 break;
733 }
734
735 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
736 flags |= ath11k_map_fw_phy_flags(reg_info->phybitmap);
737
738 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
739 reg_rule->start_freq,
740 reg_rule->end_freq, max_bw,
741 reg_rule->ant_gain, reg_rule->reg_power,
742 reg_rule->psd_eirp, flags);
743
744 /* Update dfs cac timeout if the dfs domain is ETSI and the
745 * new rule covers weather radar band.
746 * Default value of '0' corresponds to 60s timeout, so no
747 * need to update that for other rules.
748 */
749 if (flags & NL80211_RRF_DFS &&
750 reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
751 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
752 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
753 ath11k_reg_update_weather_radar_band(ab, tmp_regd,
754 reg_rule, &i,
755 flags, max_bw);
756 continue;
757 }
758
759 if (reg_info->is_ext_reg_event) {
760 ath11k_dbg(ab, ATH11K_DBG_REG,
761 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
762 i + 1, reg_rule->start_freq, reg_rule->end_freq,
763 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
764 tmp_regd->reg_rules[i].dfs_cac_ms, flags,
765 reg_rule->psd_flag, reg_rule->psd_eirp);
766 } else {
767 ath11k_dbg(ab, ATH11K_DBG_REG,
768 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
769 i + 1, reg_rule->start_freq, reg_rule->end_freq,
770 max_bw, reg_rule->ant_gain, reg_rule->reg_power,
771 tmp_regd->reg_rules[i].dfs_cac_ms,
772 flags);
773 }
774 }
775
776 tmp_regd->n_reg_rules = i;
777
778 if (intersect) {
779 default_regd = ab->default_regd[reg_info->phy_id];
780
781 /* Get a new regd by intersecting the received regd with
782 * our default regd.
783 */
784 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
785 kfree(tmp_regd);
786 if (!new_regd) {
787 ath11k_warn(ab, "Unable to create intersected regdomain\n");
788 goto ret;
789 }
790 } else {
791 new_regd = tmp_regd;
792 }
793
794 ret:
795 return new_regd;
796 }
797
ath11k_regd_update_chan_list_work(struct work_struct * work)798 void ath11k_regd_update_chan_list_work(struct work_struct *work)
799 {
800 struct ath11k *ar = container_of(work, struct ath11k,
801 channel_update_work);
802 struct scan_chan_list_params *params;
803 struct list_head local_update_list;
804 int left;
805
806 INIT_LIST_HEAD(&local_update_list);
807
808 spin_lock_bh(&ar->data_lock);
809 list_splice_tail_init(&ar->channel_update_queue, &local_update_list);
810 spin_unlock_bh(&ar->data_lock);
811
812 while ((params = list_first_entry_or_null(&local_update_list,
813 struct scan_chan_list_params,
814 list))) {
815 if (ar->state_11d != ATH11K_11D_IDLE) {
816 left = wait_for_completion_timeout(&ar->completed_11d_scan,
817 ATH11K_SCAN_TIMEOUT_HZ);
818 if (!left) {
819 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
820 "failed to receive 11d scan complete: timed out\n");
821 ar->state_11d = ATH11K_11D_IDLE;
822 }
823
824 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
825 "reg 11d scan wait left time %d\n", left);
826 }
827
828 if ((ar->scan.state == ATH11K_SCAN_STARTING ||
829 ar->scan.state == ATH11K_SCAN_RUNNING)) {
830 left = wait_for_completion_timeout(&ar->scan.completed,
831 ATH11K_SCAN_TIMEOUT_HZ);
832 if (!left)
833 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
834 "failed to receive hw scan complete: timed out\n");
835
836 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
837 "reg hw scan wait left time %d\n", left);
838 }
839
840 ath11k_wmi_send_scan_chan_list_cmd(ar, params);
841 list_del(¶ms->list);
842 kfree(params);
843 }
844 }
845
ath11k_reg_is_world_alpha(char * alpha)846 static bool ath11k_reg_is_world_alpha(char *alpha)
847 {
848 if (alpha[0] == '0' && alpha[1] == '0')
849 return true;
850
851 if (alpha[0] == 'n' && alpha[1] == 'a')
852 return true;
853
854 return false;
855 }
856
ath11k_reg_get_ar_vdev_type(struct ath11k * ar)857 static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar)
858 {
859 struct ath11k_vif *arvif;
860
861 /* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy
862 * and one struct ieee80211_regdomain, so it could only store one group
863 * reg rules. It means multi-interface concurrency in the same ath11k is
864 * not support for the regdomain. So get the vdev type of the first entry
865 * now. After concurrency support for the regdomain, this should change.
866 */
867 arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list);
868 if (arvif)
869 return arvif->vdev_type;
870
871 return WMI_VDEV_TYPE_UNSPEC;
872 }
873
ath11k_reg_handle_chan_list(struct ath11k_base * ab,struct cur_regulatory_info * reg_info,enum ieee80211_ap_reg_power power_type)874 int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
875 struct cur_regulatory_info *reg_info,
876 enum ieee80211_ap_reg_power power_type)
877 {
878 struct ieee80211_regdomain *regd;
879 bool intersect = false;
880 int pdev_idx;
881 struct ath11k *ar;
882 enum wmi_vdev_type vdev_type;
883
884 ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list");
885
886 if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
887 /* In case of failure to set the requested ctry,
888 * fw retains the current regd. We print a failure info
889 * and return from here.
890 */
891 ath11k_warn(ab, "Failed to set the requested Country regulatory setting\n");
892 return -EINVAL;
893 }
894
895 pdev_idx = reg_info->phy_id;
896
897 /* Avoid default reg rule updates sent during FW recovery if
898 * it is already available
899 */
900 spin_lock_bh(&ab->base_lock);
901 if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
902 ab->default_regd[pdev_idx]) {
903 spin_unlock_bh(&ab->base_lock);
904 goto retfail;
905 }
906 spin_unlock_bh(&ab->base_lock);
907
908 if (pdev_idx >= ab->num_radios) {
909 /* Process the event for phy0 only if single_pdev_only
910 * is true. If pdev_idx is valid but not 0, discard the
911 * event. Otherwise, it goes to fallback. In either case
912 * ath11k_reg_reset_info() needs to be called to avoid
913 * memory leak issue.
914 */
915 ath11k_reg_reset_info(reg_info);
916
917 if (ab->hw_params.single_pdev_only &&
918 pdev_idx < ab->hw_params.num_rxdma_per_pdev)
919 return 0;
920 goto fallback;
921 }
922
923 /* Avoid multiple overwrites to default regd, during core
924 * stop-start after mac registration.
925 */
926 if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
927 !memcmp((char *)ab->default_regd[pdev_idx]->alpha2,
928 (char *)reg_info->alpha2, 2) &&
929 power_type == IEEE80211_REG_UNSET_AP) {
930 ath11k_reg_reset_info(reg_info);
931 return 0;
932 }
933
934 /* Intersect new rules with default regd if a new country setting was
935 * requested, i.e a default regd was already set during initialization
936 * and the regd coming from this event has a valid country info.
937 */
938 if (ab->default_regd[pdev_idx] &&
939 !ath11k_reg_is_world_alpha((char *)
940 ab->default_regd[pdev_idx]->alpha2) &&
941 !ath11k_reg_is_world_alpha((char *)reg_info->alpha2))
942 intersect = true;
943
944 ar = ab->pdevs[pdev_idx].ar;
945 vdev_type = ath11k_reg_get_ar_vdev_type(ar);
946
947 ath11k_dbg(ab, ATH11K_DBG_WMI,
948 "wmi handle chan list power type %d vdev type %d intersect %d\n",
949 power_type, vdev_type, intersect);
950
951 regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type);
952 if (!regd) {
953 ath11k_warn(ab, "failed to build regd from reg_info\n");
954 goto fallback;
955 }
956
957 if (power_type == IEEE80211_REG_UNSET_AP) {
958 ath11k_reg_reset_info(&ab->reg_info_store[pdev_idx]);
959 ab->reg_info_store[pdev_idx] = *reg_info;
960 }
961
962 spin_lock_bh(&ab->base_lock);
963 if (ab->default_regd[pdev_idx]) {
964 /* The initial rules from FW after WMI Init is to build
965 * the default regd. From then on, any rules updated for
966 * the pdev could be due to user reg changes.
967 * Free previously built regd before assigning the newly
968 * generated regd to ar. NULL pointer handling will be
969 * taken care by kfree itself.
970 */
971 ar = ab->pdevs[pdev_idx].ar;
972 kfree(ab->new_regd[pdev_idx]);
973 ab->new_regd[pdev_idx] = regd;
974 queue_work(ab->workqueue, &ar->regd_update_work);
975 } else {
976 /* This regd would be applied during mac registration and is
977 * held constant throughout for regd intersection purpose
978 */
979 ab->default_regd[pdev_idx] = regd;
980 }
981 ab->dfs_region = reg_info->dfs_region;
982 spin_unlock_bh(&ab->base_lock);
983
984 return 0;
985
986 fallback:
987 /* Fallback to older reg (by sending previous country setting
988 * again if fw has succeeded and we failed to process here.
989 * The Regdomain should be uniform across driver and fw. Since the
990 * FW has processed the command and sent a success status, we expect
991 * this function to succeed as well. If it doesn't, CTRY needs to be
992 * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent.
993 */
994 /* TODO: This is rare, but still should also be handled */
995 WARN_ON(1);
996
997 retfail:
998
999 return -EINVAL;
1000 }
1001
ath11k_regd_update_work(struct work_struct * work)1002 void ath11k_regd_update_work(struct work_struct *work)
1003 {
1004 struct ath11k *ar = container_of(work, struct ath11k,
1005 regd_update_work);
1006 int ret;
1007
1008 ret = ath11k_regd_update(ar);
1009 if (ret) {
1010 /* Firmware has already moved to the new regd. We need
1011 * to maintain channel consistency across FW, Host driver
1012 * and userspace. Hence as a fallback mechanism we can set
1013 * the prev or default country code to the firmware.
1014 */
1015 /* TODO: Implement Fallback Mechanism */
1016 }
1017 }
1018
ath11k_reg_init(struct ath11k * ar)1019 void ath11k_reg_init(struct ath11k *ar)
1020 {
1021 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
1022 ar->hw->wiphy->flags |= WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER;
1023 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
1024 }
1025
ath11k_reg_reset_info(struct cur_regulatory_info * reg_info)1026 void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info)
1027 {
1028 int i, j;
1029
1030 if (!reg_info)
1031 return;
1032
1033 kfree(reg_info->reg_rules_2ghz_ptr);
1034 kfree(reg_info->reg_rules_5ghz_ptr);
1035
1036 for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
1037 kfree(reg_info->reg_rules_6ghz_ap_ptr[i]);
1038
1039 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
1040 kfree(reg_info->reg_rules_6ghz_client_ptr[i][j]);
1041 }
1042
1043 memset(reg_info, 0, sizeof(*reg_info));
1044 }
1045
ath11k_reg_free(struct ath11k_base * ab)1046 void ath11k_reg_free(struct ath11k_base *ab)
1047 {
1048 int i;
1049
1050 for (i = 0; i < ab->num_radios; i++)
1051 ath11k_reg_reset_info(&ab->reg_info_store[i]);
1052
1053 kfree(ab->reg_info_store);
1054 ab->reg_info_store = NULL;
1055
1056 for (i = 0; i < ab->hw_params.max_radios; i++) {
1057 kfree(ab->default_regd[i]);
1058 kfree(ab->new_regd[i]);
1059 }
1060 }
1061
ath11k_reg_set_cc(struct ath11k * ar)1062 int ath11k_reg_set_cc(struct ath11k *ar)
1063 {
1064 struct wmi_set_current_country_params set_current_param = {};
1065
1066 memcpy(&set_current_param.alpha2, ar->alpha2, 2);
1067 return ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
1068 }
1069