]> Git Repo - J-linux.git/blob - drivers/net/wireless/ath/ath11k/reg.c
Merge tag 'vfs-6.13-rc7.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
[J-linux.git] / drivers / net / wireless / ath / ath11k / reg.c
1 // SPDX-License-Identifier: BSD-3-Clause-Clear
2 /*
3  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
4  * Copyright (c) 2021-2024 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
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
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
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         /* 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(&ar->alpha2, request->alpha2, 2);
86                 ret = ath11k_reg_set_cc(ar);
87                 if (ret)
88                         ath11k_warn(ar->ab,
89                                     "failed set current country code: %d\n", ret);
90         } else {
91                 init_country_param.flags = ALPHA_IS_SET;
92                 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
93                 init_country_param.cc_info.alpha2[2] = 0;
94
95                 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
96                 if (ret)
97                         ath11k_warn(ar->ab,
98                                     "INIT Country code set to fw failed : %d\n", ret);
99         }
100
101         ath11k_mac_11d_scan_stop(ar);
102         ar->regdom_set_by_user = true;
103 }
104
105 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait)
106 {
107         struct ieee80211_supported_band **bands;
108         struct scan_chan_list_params *params;
109         struct ieee80211_channel *channel;
110         struct ieee80211_hw *hw = ar->hw;
111         struct channel_param *ch;
112         enum nl80211_band band;
113         int num_channels = 0;
114         int i, ret, left;
115
116         if (wait && ar->state_11d != ATH11K_11D_IDLE) {
117                 left = wait_for_completion_timeout(&ar->completed_11d_scan,
118                                                    ATH11K_SCAN_TIMEOUT_HZ);
119                 if (!left) {
120                         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
121                                    "failed to receive 11d scan complete: timed out\n");
122                         ar->state_11d = ATH11K_11D_IDLE;
123                 }
124                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
125                            "11d scan wait left time %d\n", left);
126         }
127
128         if (wait &&
129             (ar->scan.state == ATH11K_SCAN_STARTING ||
130             ar->scan.state == ATH11K_SCAN_RUNNING)) {
131                 left = wait_for_completion_timeout(&ar->scan.completed,
132                                                    ATH11K_SCAN_TIMEOUT_HZ);
133                 if (!left)
134                         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
135                                    "failed to receive hw scan complete: timed out\n");
136
137                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
138                            "hw scan wait left time %d\n", left);
139         }
140
141         if (ar->state == ATH11K_STATE_RESTARTING)
142                 return 0;
143
144         bands = hw->wiphy->bands;
145         for (band = 0; band < NUM_NL80211_BANDS; band++) {
146                 if (!bands[band])
147                         continue;
148
149                 for (i = 0; i < bands[band]->n_channels; i++) {
150                         if (bands[band]->channels[i].flags &
151                             IEEE80211_CHAN_DISABLED)
152                                 continue;
153
154                         num_channels++;
155                 }
156         }
157
158         if (WARN_ON(!num_channels))
159                 return -EINVAL;
160
161         params = kzalloc(struct_size(params, ch_param, num_channels),
162                          GFP_KERNEL);
163         if (!params)
164                 return -ENOMEM;
165
166         params->pdev_id = ar->pdev->pdev_id;
167         params->nallchans = num_channels;
168
169         ch = params->ch_param;
170
171         for (band = 0; band < NUM_NL80211_BANDS; band++) {
172                 if (!bands[band])
173                         continue;
174
175                 for (i = 0; i < bands[band]->n_channels; i++) {
176                         channel = &bands[band]->channels[i];
177
178                         if (channel->flags & IEEE80211_CHAN_DISABLED)
179                                 continue;
180
181                         /* TODO: Set to true/false based on some condition? */
182                         ch->allow_ht = true;
183                         ch->allow_vht = true;
184                         ch->allow_he = true;
185
186                         ch->dfs_set =
187                                 !!(channel->flags & IEEE80211_CHAN_RADAR);
188                         ch->is_chan_passive = !!(channel->flags &
189                                                 IEEE80211_CHAN_NO_IR);
190                         ch->is_chan_passive |= ch->dfs_set;
191                         ch->mhz = channel->center_freq;
192                         ch->cfreq1 = channel->center_freq;
193                         ch->minpower = 0;
194                         ch->maxpower = channel->max_power * 2;
195                         ch->maxregpower = channel->max_reg_power * 2;
196                         ch->antennamax = channel->max_antenna_gain * 2;
197
198                         /* TODO: Use appropriate phymodes */
199                         if (channel->band == NL80211_BAND_2GHZ)
200                                 ch->phy_mode = MODE_11G;
201                         else
202                                 ch->phy_mode = MODE_11A;
203
204                         if (channel->band == NL80211_BAND_6GHZ &&
205                             cfg80211_channel_is_psc(channel))
206                                 ch->psc_channel = true;
207
208                         ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
209                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
210                                    i, params->nallchans,
211                                    ch->mhz, ch->maxpower, ch->maxregpower,
212                                    ch->antennamax, ch->phy_mode);
213
214                         ch++;
215                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
216                          * set_agile, reg_class_idx
217                          */
218                 }
219         }
220
221         ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
222         kfree(params);
223
224         return ret;
225 }
226
227 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
228                              struct ieee80211_regdomain *regd_copy)
229 {
230         u8 i;
231
232         /* The caller should have checked error conditions */
233         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
234
235         for (i = 0; i < regd_orig->n_reg_rules; i++)
236                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
237                        sizeof(struct ieee80211_reg_rule));
238 }
239
240 int ath11k_regd_update(struct ath11k *ar)
241 {
242         struct ieee80211_regdomain *regd, *regd_copy = NULL;
243         int ret, regd_len, pdev_id;
244         struct ath11k_base *ab;
245
246         ab = ar->ab;
247         pdev_id = ar->pdev_idx;
248
249         spin_lock_bh(&ab->base_lock);
250
251         /* Prefer the latest regd update over default if it's available */
252         if (ab->new_regd[pdev_id]) {
253                 regd = ab->new_regd[pdev_id];
254         } else {
255                 /* Apply the regd received during init through
256                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
257                  * receive the regd, initialize with a default world
258                  * regulatory.
259                  */
260                 if (ab->default_regd[pdev_id]) {
261                         regd = ab->default_regd[pdev_id];
262                 } else {
263                         ath11k_warn(ab,
264                                     "failed to receive default regd during init\n");
265                         regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
266                 }
267         }
268
269         if (!regd) {
270                 ret = -EINVAL;
271                 spin_unlock_bh(&ab->base_lock);
272                 goto err;
273         }
274
275         regd_len = sizeof(*regd) + (regd->n_reg_rules *
276                 sizeof(struct ieee80211_reg_rule));
277
278         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
279         if (regd_copy)
280                 ath11k_copy_regd(regd, regd_copy);
281
282         spin_unlock_bh(&ab->base_lock);
283
284         if (!regd_copy) {
285                 ret = -ENOMEM;
286                 goto err;
287         }
288
289         ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
290
291         kfree(regd_copy);
292
293         if (ret)
294                 goto err;
295
296         if (ar->state == ATH11K_STATE_ON) {
297                 ret = ath11k_reg_update_chan_list(ar, true);
298                 if (ret)
299                         goto err;
300         }
301
302         return 0;
303 err:
304         ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
305         return ret;
306 }
307
308 static enum nl80211_dfs_regions
309 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
310 {
311         switch (dfs_region) {
312         case ATH11K_DFS_REG_FCC:
313         case ATH11K_DFS_REG_CN:
314                 return NL80211_DFS_FCC;
315         case ATH11K_DFS_REG_ETSI:
316         case ATH11K_DFS_REG_KR:
317                 return NL80211_DFS_ETSI;
318         case ATH11K_DFS_REG_MKK:
319         case ATH11K_DFS_REG_MKK_N:
320                 return NL80211_DFS_JP;
321         default:
322                 return NL80211_DFS_UNSET;
323         }
324 }
325
326 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
327 {
328         u32 flags = 0;
329
330         if (reg_flags & REGULATORY_CHAN_NO_IR)
331                 flags = NL80211_RRF_NO_IR;
332
333         if (reg_flags & REGULATORY_CHAN_RADAR)
334                 flags |= NL80211_RRF_DFS;
335
336         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
337                 flags |= NL80211_RRF_NO_OFDM;
338
339         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
340                 flags |= NL80211_RRF_NO_OUTDOOR;
341
342         if (reg_flags & REGULATORY_CHAN_NO_HT40)
343                 flags |= NL80211_RRF_NO_HT40;
344
345         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
346                 flags |= NL80211_RRF_NO_80MHZ;
347
348         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
349                 flags |= NL80211_RRF_NO_160MHZ;
350
351         return flags;
352 }
353
354 static u32 ath11k_map_fw_phy_flags(u32 phy_flags)
355 {
356         u32 flags = 0;
357
358         if (phy_flags & ATH11K_REG_PHY_BITMAP_NO11AX)
359                 flags |= NL80211_RRF_NO_HE;
360
361         return flags;
362 }
363
364 static bool
365 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
366                          struct ieee80211_reg_rule *rule2)
367 {
368         u32 start_freq1, end_freq1;
369         u32 start_freq2, end_freq2;
370
371         start_freq1 = rule1->freq_range.start_freq_khz;
372         start_freq2 = rule2->freq_range.start_freq_khz;
373
374         end_freq1 = rule1->freq_range.end_freq_khz;
375         end_freq2 = rule2->freq_range.end_freq_khz;
376
377         if ((start_freq1 >= start_freq2 &&
378              start_freq1 < end_freq2) ||
379             (start_freq2 > start_freq1 &&
380              start_freq2 < end_freq1))
381                 return true;
382
383         /* TODO: Should we restrict intersection feasibility
384          *  based on min bandwidth of the intersected region also,
385          *  say the intersected rule should have a  min bandwidth
386          * of 20MHz?
387          */
388
389         return false;
390 }
391
392 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
393                                        struct ieee80211_reg_rule *rule2,
394                                        struct ieee80211_reg_rule *new_rule)
395 {
396         u32 start_freq1, end_freq1;
397         u32 start_freq2, end_freq2;
398         u32 freq_diff, max_bw;
399
400         start_freq1 = rule1->freq_range.start_freq_khz;
401         start_freq2 = rule2->freq_range.start_freq_khz;
402
403         end_freq1 = rule1->freq_range.end_freq_khz;
404         end_freq2 = rule2->freq_range.end_freq_khz;
405
406         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
407                                                     start_freq2);
408         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
409
410         freq_diff = new_rule->freq_range.end_freq_khz -
411                         new_rule->freq_range.start_freq_khz;
412         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
413                        rule2->freq_range.max_bandwidth_khz);
414         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
415
416         new_rule->power_rule.max_antenna_gain =
417                 min_t(u32, rule1->power_rule.max_antenna_gain,
418                       rule2->power_rule.max_antenna_gain);
419
420         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
421                                               rule2->power_rule.max_eirp);
422
423         /* Use the flags of both the rules */
424         new_rule->flags = rule1->flags | rule2->flags;
425
426         if ((rule1->flags & NL80211_RRF_PSD) && (rule2->flags & NL80211_RRF_PSD))
427                 new_rule->psd = min_t(s8, rule1->psd, rule2->psd);
428         else
429                 new_rule->flags &= ~NL80211_RRF_PSD;
430
431         /* To be safe, lts use the max cac timeout of both rules */
432         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
433                                      rule2->dfs_cac_ms);
434 }
435
436 static struct ieee80211_regdomain *
437 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
438                       struct ieee80211_regdomain *curr_regd)
439 {
440         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
441         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
442         struct ieee80211_regdomain *new_regd = NULL;
443         u8 i, j, k;
444
445         num_old_regd_rules = default_regd->n_reg_rules;
446         num_curr_regd_rules = curr_regd->n_reg_rules;
447         num_new_regd_rules = 0;
448
449         /* Find the number of intersecting rules to allocate new regd memory */
450         for (i = 0; i < num_old_regd_rules; i++) {
451                 old_rule = default_regd->reg_rules + i;
452                 for (j = 0; j < num_curr_regd_rules; j++) {
453                         curr_rule = curr_regd->reg_rules + j;
454
455                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
456                                 num_new_regd_rules++;
457                 }
458         }
459
460         if (!num_new_regd_rules)
461                 return NULL;
462
463         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
464                         sizeof(struct ieee80211_reg_rule)),
465                         GFP_ATOMIC);
466
467         if (!new_regd)
468                 return NULL;
469
470         /* We set the new country and dfs region directly and only trim
471          * the freq, power, antenna gain by intersecting with the
472          * default regdomain. Also MAX of the dfs cac timeout is selected.
473          */
474         new_regd->n_reg_rules = num_new_regd_rules;
475         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
476         new_regd->dfs_region = curr_regd->dfs_region;
477         new_rule = new_regd->reg_rules;
478
479         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
480                 old_rule = default_regd->reg_rules + i;
481                 for (j = 0; j < num_curr_regd_rules; j++) {
482                         curr_rule = curr_regd->reg_rules + j;
483
484                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
485                                 ath11k_reg_intersect_rules(old_rule, curr_rule,
486                                                            (new_rule + k++));
487                 }
488         }
489         return new_regd;
490 }
491
492 static const char *
493 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
494 {
495         switch (dfs_region) {
496         case NL80211_DFS_FCC:
497                 return "FCC";
498         case NL80211_DFS_ETSI:
499                 return "ETSI";
500         case NL80211_DFS_JP:
501                 return "JP";
502         default:
503                 return "UNSET";
504         }
505 }
506
507 static u16
508 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
509 {
510         u16 bw;
511
512         if (end_freq <= start_freq)
513                 return 0;
514
515         bw = end_freq - start_freq;
516         bw = min_t(u16, bw, max_bw);
517
518         if (bw >= 80 && bw < 160)
519                 bw = 80;
520         else if (bw >= 40 && bw < 80)
521                 bw = 40;
522         else if (bw >= 20 && bw < 40)
523                 bw = 20;
524         else
525                 bw = 0;
526
527         return bw;
528 }
529
530 static void
531 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
532                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
533                        s8 psd, u32 reg_flags)
534 {
535         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
536         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
537         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
538         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
539         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
540         reg_rule->psd = psd;
541         reg_rule->flags = reg_flags;
542 }
543
544 static void
545 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
546                                      struct ieee80211_regdomain *regd,
547                                      struct cur_reg_rule *reg_rule,
548                                      u8 *rule_idx, u32 flags, u16 max_bw)
549 {
550         u32 start_freq;
551         u32 end_freq;
552         u16 bw;
553         u8 i;
554
555         i = *rule_idx;
556
557         /* there might be situations when even the input rule must be dropped */
558         i--;
559
560         /* frequencies below weather radar */
561         bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
562                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
563         if (bw > 0) {
564                 i++;
565
566                 ath11k_reg_update_rule(regd->reg_rules + i,
567                                        reg_rule->start_freq,
568                                        ETSI_WEATHER_RADAR_BAND_LOW, bw,
569                                        reg_rule->ant_gain, reg_rule->reg_power,
570                                        reg_rule->psd_eirp, flags);
571
572                 ath11k_dbg(ab, ATH11K_DBG_REG,
573                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
574                            i + 1, reg_rule->start_freq,
575                            ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
576                            reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
577                            flags);
578         }
579
580         /* weather radar frequencies */
581         start_freq = max_t(u32, reg_rule->start_freq,
582                            ETSI_WEATHER_RADAR_BAND_LOW);
583         end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
584
585         bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
586         if (bw > 0) {
587                 i++;
588
589                 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
590                                        end_freq, bw, reg_rule->ant_gain,
591                                        reg_rule->reg_power, reg_rule->psd_eirp, flags);
592
593                 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
594
595                 ath11k_dbg(ab, ATH11K_DBG_REG,
596                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
597                            i + 1, start_freq, end_freq, bw,
598                            reg_rule->ant_gain, reg_rule->reg_power,
599                            regd->reg_rules[i].dfs_cac_ms, flags);
600         }
601
602         /* frequencies above weather radar */
603         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
604                                   reg_rule->end_freq, max_bw);
605         if (bw > 0) {
606                 i++;
607
608                 ath11k_reg_update_rule(regd->reg_rules + i,
609                                        ETSI_WEATHER_RADAR_BAND_HIGH,
610                                        reg_rule->end_freq, bw,
611                                        reg_rule->ant_gain, reg_rule->reg_power,
612                                        reg_rule->psd_eirp, flags);
613
614                 ath11k_dbg(ab, ATH11K_DBG_REG,
615                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
616                            i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
617                            reg_rule->end_freq, bw, reg_rule->ant_gain,
618                            reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
619                            flags);
620         }
621
622         *rule_idx = i;
623 }
624
625 enum wmi_reg_6ghz_ap_type
626 ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)
627 {
628         switch (power_type) {
629         case IEEE80211_REG_LPI_AP:
630                 return WMI_REG_INDOOR_AP;
631         case IEEE80211_REG_SP_AP:
632                 return WMI_REG_STANDARD_POWER_AP;
633         case IEEE80211_REG_VLP_AP:
634                 return WMI_REG_VERY_LOW_POWER_AP;
635         default:
636                 return WMI_REG_MAX_AP_TYPE;
637         }
638 }
639
640 struct ieee80211_regdomain *
641 ath11k_reg_build_regd(struct ath11k_base *ab,
642                       struct cur_regulatory_info *reg_info, bool intersect,
643                       enum wmi_vdev_type vdev_type,
644                       enum ieee80211_ap_reg_power power_type)
645 {
646         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
647         struct cur_reg_rule *reg_rule, *reg_rule_6ghz;
648         u8 i = 0, j = 0, k = 0;
649         u8 num_rules;
650         u16 max_bw;
651         u32 flags, reg_6ghz_number, max_bw_6ghz;
652         char alpha2[3];
653
654         num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
655
656         if (reg_info->is_ext_reg_event) {
657                 if (vdev_type == WMI_VDEV_TYPE_STA) {
658                         enum wmi_reg_6ghz_ap_type ap_type;
659
660                         ap_type = ath11k_reg_ap_pwr_convert(power_type);
661
662                         if (ap_type == WMI_REG_MAX_AP_TYPE)
663                                 ap_type = WMI_REG_INDOOR_AP;
664
665                         reg_6ghz_number = reg_info->num_6ghz_rules_client
666                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
667
668                         if (reg_6ghz_number == 0) {
669                                 ap_type = WMI_REG_INDOOR_AP;
670                                 reg_6ghz_number = reg_info->num_6ghz_rules_client
671                                                 [ap_type][WMI_REG_DEFAULT_CLIENT];
672                         }
673
674                         reg_rule_6ghz = reg_info->reg_rules_6ghz_client_ptr
675                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
676                         max_bw_6ghz = reg_info->max_bw_6ghz_client
677                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
678                 } else {
679                         reg_6ghz_number = reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
680                         reg_rule_6ghz =
681                                 reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP];
682                         max_bw_6ghz = reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP];
683                 }
684
685                 num_rules += reg_6ghz_number;
686         }
687
688         if (!num_rules)
689                 goto ret;
690
691         /* Add max additional rules to accommodate weather radar band */
692         if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
693                 num_rules += 2;
694
695         tmp_regd =  kzalloc(sizeof(*tmp_regd) +
696                         (num_rules * sizeof(struct ieee80211_reg_rule)),
697                         GFP_ATOMIC);
698         if (!tmp_regd)
699                 goto ret;
700
701         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
702         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
703         alpha2[2] = '\0';
704         tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
705
706         ath11k_dbg(ab, ATH11K_DBG_REG,
707                    "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
708                    alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
709                    reg_info->dfs_region, num_rules);
710         /* Update reg_rules[] below. Firmware is expected to
711          * send these rules in order(2 GHz rules first and then 5 GHz)
712          */
713         for (; i < num_rules; i++) {
714                 if (reg_info->num_2ghz_reg_rules &&
715                     (i < reg_info->num_2ghz_reg_rules)) {
716                         reg_rule = reg_info->reg_rules_2ghz_ptr + i;
717                         max_bw = min_t(u16, reg_rule->max_bw,
718                                        reg_info->max_bw_2ghz);
719                         flags = 0;
720                 } else if (reg_info->num_5ghz_reg_rules &&
721                            (j < reg_info->num_5ghz_reg_rules)) {
722                         reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
723                         max_bw = min_t(u16, reg_rule->max_bw,
724                                        reg_info->max_bw_5ghz);
725
726                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
727                          * BW Auto correction, we can enable this by default
728                          * for all 5G rules here. The regulatory core performs
729                          * BW correction if required and applies flags as
730                          * per other BW rule flags we pass from here
731                          */
732                         flags = NL80211_RRF_AUTO_BW;
733                 } else if (reg_info->is_ext_reg_event && reg_6ghz_number &&
734                            k < reg_6ghz_number) {
735                         reg_rule = reg_rule_6ghz + k++;
736                         max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz);
737                         flags = NL80211_RRF_AUTO_BW;
738                         if (reg_rule->psd_flag)
739                                 flags |= NL80211_RRF_PSD;
740                 } else {
741                         break;
742                 }
743
744                 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
745                 flags |= ath11k_map_fw_phy_flags(reg_info->phybitmap);
746
747                 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
748                                        reg_rule->start_freq,
749                                        reg_rule->end_freq, max_bw,
750                                        reg_rule->ant_gain, reg_rule->reg_power,
751                                        reg_rule->psd_eirp, flags);
752
753                 /* Update dfs cac timeout if the dfs domain is ETSI and the
754                  * new rule covers weather radar band.
755                  * Default value of '0' corresponds to 60s timeout, so no
756                  * need to update that for other rules.
757                  */
758                 if (flags & NL80211_RRF_DFS &&
759                     reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
760                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
761                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
762                         ath11k_reg_update_weather_radar_band(ab, tmp_regd,
763                                                              reg_rule, &i,
764                                                              flags, max_bw);
765                         continue;
766                 }
767
768                 if (reg_info->is_ext_reg_event) {
769                         ath11k_dbg(ab, ATH11K_DBG_REG,
770                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
771                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
772                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
773                                    tmp_regd->reg_rules[i].dfs_cac_ms, flags,
774                                    reg_rule->psd_flag, reg_rule->psd_eirp);
775                 } else {
776                         ath11k_dbg(ab, ATH11K_DBG_REG,
777                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
778                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
779                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
780                                    tmp_regd->reg_rules[i].dfs_cac_ms,
781                                    flags);
782                 }
783         }
784
785         tmp_regd->n_reg_rules = i;
786
787         if (intersect) {
788                 default_regd = ab->default_regd[reg_info->phy_id];
789
790                 /* Get a new regd by intersecting the received regd with
791                  * our default regd.
792                  */
793                 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
794                 kfree(tmp_regd);
795                 if (!new_regd) {
796                         ath11k_warn(ab, "Unable to create intersected regdomain\n");
797                         goto ret;
798                 }
799         } else {
800                 new_regd = tmp_regd;
801         }
802
803 ret:
804         return new_regd;
805 }
806
807 static bool ath11k_reg_is_world_alpha(char *alpha)
808 {
809         if (alpha[0] == '0' && alpha[1] == '0')
810                 return true;
811
812         if (alpha[0] == 'n' && alpha[1] == 'a')
813                 return true;
814
815         return false;
816 }
817
818 static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar)
819 {
820         struct ath11k_vif *arvif;
821
822         /* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy
823          * and one struct ieee80211_regdomain, so it could only store one group
824          * reg rules. It means multi-interface concurrency in the same ath11k is
825          * not support for the regdomain. So get the vdev type of the first entry
826          * now. After concurrency support for the regdomain, this should change.
827          */
828         arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list);
829         if (arvif)
830                 return arvif->vdev_type;
831
832         return WMI_VDEV_TYPE_UNSPEC;
833 }
834
835 int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
836                                 struct cur_regulatory_info *reg_info,
837                                 enum ieee80211_ap_reg_power power_type)
838 {
839         struct ieee80211_regdomain *regd;
840         bool intersect = false;
841         int pdev_idx;
842         struct ath11k *ar;
843         enum wmi_vdev_type vdev_type;
844
845         ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list");
846
847         if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
848                 /* In case of failure to set the requested ctry,
849                  * fw retains the current regd. We print a failure info
850                  * and return from here.
851                  */
852                 ath11k_warn(ab, "Failed to set the requested Country regulatory setting\n");
853                 return -EINVAL;
854         }
855
856         pdev_idx = reg_info->phy_id;
857
858         /* Avoid default reg rule updates sent during FW recovery if
859          * it is already available
860          */
861         spin_lock_bh(&ab->base_lock);
862         if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
863             ab->default_regd[pdev_idx]) {
864                 spin_unlock_bh(&ab->base_lock);
865                 goto retfail;
866         }
867         spin_unlock_bh(&ab->base_lock);
868
869         if (pdev_idx >= ab->num_radios) {
870                 /* Process the event for phy0 only if single_pdev_only
871                  * is true. If pdev_idx is valid but not 0, discard the
872                  * event. Otherwise, it goes to fallback. In either case
873                  * ath11k_reg_reset_info() needs to be called to avoid
874                  * memory leak issue.
875                  */
876                 ath11k_reg_reset_info(reg_info);
877
878                 if (ab->hw_params.single_pdev_only &&
879                     pdev_idx < ab->hw_params.num_rxdma_per_pdev)
880                         return 0;
881                 goto fallback;
882         }
883
884         /* Avoid multiple overwrites to default regd, during core
885          * stop-start after mac registration.
886          */
887         if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
888             !memcmp((char *)ab->default_regd[pdev_idx]->alpha2,
889                     (char *)reg_info->alpha2, 2))
890                 goto retfail;
891
892         /* Intersect new rules with default regd if a new country setting was
893          * requested, i.e a default regd was already set during initialization
894          * and the regd coming from this event has a valid country info.
895          */
896         if (ab->default_regd[pdev_idx] &&
897             !ath11k_reg_is_world_alpha((char *)
898                 ab->default_regd[pdev_idx]->alpha2) &&
899             !ath11k_reg_is_world_alpha((char *)reg_info->alpha2))
900                 intersect = true;
901
902         ar = ab->pdevs[pdev_idx].ar;
903         vdev_type = ath11k_reg_get_ar_vdev_type(ar);
904
905         ath11k_dbg(ab, ATH11K_DBG_WMI,
906                    "wmi handle chan list power type %d vdev type %d intersect %d\n",
907                    power_type, vdev_type, intersect);
908
909         regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type);
910         if (!regd) {
911                 ath11k_warn(ab, "failed to build regd from reg_info\n");
912                 goto fallback;
913         }
914
915         if (power_type == IEEE80211_REG_UNSET_AP) {
916                 ath11k_reg_reset_info(&ab->reg_info_store[pdev_idx]);
917                 ab->reg_info_store[pdev_idx] = *reg_info;
918         }
919
920         spin_lock_bh(&ab->base_lock);
921         if (ab->default_regd[pdev_idx]) {
922                 /* The initial rules from FW after WMI Init is to build
923                  * the default regd. From then on, any rules updated for
924                  * the pdev could be due to user reg changes.
925                  * Free previously built regd before assigning the newly
926                  * generated regd to ar. NULL pointer handling will be
927                  * taken care by kfree itself.
928                  */
929                 ar = ab->pdevs[pdev_idx].ar;
930                 kfree(ab->new_regd[pdev_idx]);
931                 ab->new_regd[pdev_idx] = regd;
932                 queue_work(ab->workqueue, &ar->regd_update_work);
933         } else {
934                 /* This regd would be applied during mac registration and is
935                  * held constant throughout for regd intersection purpose
936                  */
937                 ab->default_regd[pdev_idx] = regd;
938         }
939         ab->dfs_region = reg_info->dfs_region;
940         spin_unlock_bh(&ab->base_lock);
941
942         return 0;
943
944 fallback:
945         /* Fallback to older reg (by sending previous country setting
946          * again if fw has succeeded and we failed to process here.
947          * The Regdomain should be uniform across driver and fw. Since the
948          * FW has processed the command and sent a success status, we expect
949          * this function to succeed as well. If it doesn't, CTRY needs to be
950          * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent.
951          */
952         /* TODO: This is rare, but still should also be handled */
953         WARN_ON(1);
954
955 retfail:
956
957         return -EINVAL;
958 }
959
960 void ath11k_regd_update_work(struct work_struct *work)
961 {
962         struct ath11k *ar = container_of(work, struct ath11k,
963                                          regd_update_work);
964         int ret;
965
966         ret = ath11k_regd_update(ar);
967         if (ret) {
968                 /* Firmware has already moved to the new regd. We need
969                  * to maintain channel consistency across FW, Host driver
970                  * and userspace. Hence as a fallback mechanism we can set
971                  * the prev or default country code to the firmware.
972                  */
973                 /* TODO: Implement Fallback Mechanism */
974         }
975 }
976
977 void ath11k_reg_init(struct ath11k *ar)
978 {
979         ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
980         ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
981 }
982
983 void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info)
984 {
985         int i, j;
986
987         if (!reg_info)
988                 return;
989
990         kfree(reg_info->reg_rules_2ghz_ptr);
991         kfree(reg_info->reg_rules_5ghz_ptr);
992
993         for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
994                 kfree(reg_info->reg_rules_6ghz_ap_ptr[i]);
995
996                 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
997                         kfree(reg_info->reg_rules_6ghz_client_ptr[i][j]);
998         }
999
1000         memset(reg_info, 0, sizeof(*reg_info));
1001 }
1002
1003 void ath11k_reg_free(struct ath11k_base *ab)
1004 {
1005         int i;
1006
1007         for (i = 0; i < ab->num_radios; i++)
1008                 ath11k_reg_reset_info(&ab->reg_info_store[i]);
1009
1010         kfree(ab->reg_info_store);
1011         ab->reg_info_store = NULL;
1012
1013         for (i = 0; i < ab->hw_params.max_radios; i++) {
1014                 kfree(ab->default_regd[i]);
1015                 kfree(ab->new_regd[i]);
1016         }
1017 }
1018
1019 int ath11k_reg_set_cc(struct ath11k *ar)
1020 {
1021         struct wmi_set_current_country_params set_current_param = {};
1022
1023         memcpy(&set_current_param.alpha2, ar->alpha2, 2);
1024         return ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
1025 }
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