drivers/net/wireless/ath/ath12k/reg.c

   1 // SPDX-License-Identifier: BSD-3-Clause-Clear
   2 /*
   3  * Copyright (c) 2018-2021 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 #include "core.h"
   8 #include "debug.h"
   9
  10 /* World regdom to be used in case default regd from fw is unavailable */
  11 #define ATH12K_2GHZ_CH01_11      REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
  12 #define ATH12K_5GHZ_5150_5350    REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
  13                                           NL80211_RRF_NO_IR)
  14 #define ATH12K_5GHZ_5725_5850    REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
  15                                           NL80211_RRF_NO_IR)
  16
  17 #define ETSI_WEATHER_RADAR_BAND_LOW             5590
  18 #define ETSI_WEATHER_RADAR_BAND_HIGH            5650
  19 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT     600000
  20
  21 static const struct ieee80211_regdomain ath12k_world_regd = {
  22         .n_reg_rules = 3,
  23         .alpha2 = "00",
  24         .reg_rules = {
  25                 ATH12K_2GHZ_CH01_11,
  26                 ATH12K_5GHZ_5150_5350,
  27                 ATH12K_5GHZ_5725_5850,
  28         }
  29 };
  30
  31 static bool ath12k_regdom_changes(struct ieee80211_hw *hw, char *alpha2)
  32 {
  33         const struct ieee80211_regdomain *regd;
  34
  35         regd = rcu_dereference_rtnl(hw->wiphy->regd);
  36         /* This can happen during wiphy registration where the previous
  37          * user request is received before we update the regd received
  38          * from firmware.
  39          */
  40         if (!regd)
  41                 return true;
  42
  43         return memcmp(regd->alpha2, alpha2, 2) != 0;
  44 }
  45
  46 static void
  47 ath12k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
  48 {
  49         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
  50         struct ath12k_wmi_init_country_arg arg;
  51         struct ath12k_hw *ah = ath12k_hw_to_ah(hw);
  52         struct ath12k *ar = ath12k_ah_to_ar(ah, 0);
  53         int ret, i;
  54
  55         ath12k_dbg(ar->ab, ATH12K_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                 ath12k_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                 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
  71                            "Country Setting is not allowed\n");
  72                 return;
  73         }
  74
  75         if (!ath12k_regdom_changes(hw, request->alpha2)) {
  76                 ath12k_dbg(ar->ab, ATH12K_DBG_REG, "Country is already set\n");
  77                 return;
  78         }
  79
  80         /* Set the country code to the firmware and wait for
  81          * the WMI_REG_CHAN_LIST_CC EVENT for updating the
  82          * reg info
  83          */
  84         arg.flags = ALPHA_IS_SET;
  85         memcpy(&arg.cc_info.alpha2, request->alpha2, 2);
  86         arg.cc_info.alpha2[2] = 0;
  87
  88         /* Allow fresh updates to wiphy regd */
  89         ah->regd_updated = false;
  90
  91         /* Send the reg change request to all the radios */
  92         for_each_ar(ah, ar, i) {
  93                 ret = ath12k_wmi_send_init_country_cmd(ar, &arg);
  94                 if (ret)
  95                         ath12k_warn(ar->ab,
  96                                     "INIT Country code set to fw failed : %d\n", ret);
  97         }
  98 }
  99
 100 int ath12k_reg_update_chan_list(struct ath12k *ar)
 101 {
 102         struct ieee80211_supported_band **bands;
 103         struct ath12k_wmi_scan_chan_list_arg *arg;
 104         struct ieee80211_channel *channel;
 105         struct ieee80211_hw *hw = ath12k_ar_to_hw(ar);
 106         struct ath12k_wmi_channel_arg *ch;
 107         enum nl80211_band band;
 108         int num_channels = 0;
 109         int i, ret;
 110
 111         bands = hw->wiphy->bands;
 112         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 113                 if (!(ar->mac.sbands[band].channels && bands[band]))
 114                         continue;
 115
 116                 for (i = 0; i < bands[band]->n_channels; i++) {
 117                         if (bands[band]->channels[i].flags &
 118                             IEEE80211_CHAN_DISABLED)
 119                                 continue;
 120
 121                         num_channels++;
 122                 }
 123         }
 124
 125         if (WARN_ON(!num_channels))
 126                 return -EINVAL;
 127
 128         arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);
 129
 130         if (!arg)
 131                 return -ENOMEM;
 132
 133         arg->pdev_id = ar->pdev->pdev_id;
 134         arg->nallchans = num_channels;
 135
 136         ch = arg->channel;
 137
 138         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 139                 if (!(ar->mac.sbands[band].channels && bands[band]))
 140                         continue;
 141
 142                 for (i = 0; i < bands[band]->n_channels; i++) {
 143                         channel = &bands[band]->channels[i];
 144
 145                         if (channel->flags & IEEE80211_CHAN_DISABLED)
 146                                 continue;
 147
 148                         /* TODO: Set to true/false based on some condition? */
 149                         ch->allow_ht = true;
 150                         ch->allow_vht = true;
 151                         ch->allow_he = true;
 152
 153                         ch->dfs_set =
 154                                 !!(channel->flags & IEEE80211_CHAN_RADAR);
 155                         ch->is_chan_passive = !!(channel->flags &
 156                                                 IEEE80211_CHAN_NO_IR);
 157                         ch->is_chan_passive |= ch->dfs_set;
 158                         ch->mhz = channel->center_freq;
 159                         ch->cfreq1 = channel->center_freq;
 160                         ch->minpower = 0;
 161                         ch->maxpower = channel->max_power * 2;
 162                         ch->maxregpower = channel->max_reg_power * 2;
 163                         ch->antennamax = channel->max_antenna_gain * 2;
 164
 165                         /* TODO: Use appropriate phymodes */
 166                         if (channel->band == NL80211_BAND_2GHZ)
 167                                 ch->phy_mode = MODE_11G;
 168                         else
 169                                 ch->phy_mode = MODE_11A;
 170
 171                         if (channel->band == NL80211_BAND_6GHZ &&
 172                             cfg80211_channel_is_psc(channel))
 173                                 ch->psc_channel = true;
 174
 175                         ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
 176                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
 177                                    i, arg->nallchans,
 178                                    ch->mhz, ch->maxpower, ch->maxregpower,
 179                                    ch->antennamax, ch->phy_mode);
 180
 181                         ch++;
 182                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
 183                          * set_agile, reg_class_idx
 184                          */
 185                 }
 186         }
 187
 188         ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
 189         kfree(arg);
 190
 191         return ret;
 192 }
 193
 194 static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
 195                              struct ieee80211_regdomain *regd_copy)
 196 {
 197         u8 i;
 198
 199         /* The caller should have checked error conditions */
 200         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
 201
 202         for (i = 0; i < regd_orig->n_reg_rules; i++)
 203                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
 204                        sizeof(struct ieee80211_reg_rule));
 205 }
 206
 207 int ath12k_regd_update(struct ath12k *ar, bool init)
 208 {
 209         struct ath12k_hw *ah = ath12k_ar_to_ah(ar);
 210         struct ieee80211_hw *hw = ah->hw;
 211         struct ieee80211_regdomain *regd, *regd_copy = NULL;
 212         int ret, regd_len, pdev_id;
 213         struct ath12k_base *ab;
 214         int i;
 215
 216         ab = ar->ab;
 217
 218         /* If one of the radios within ah has already updated the regd for
 219          * the wiphy, then avoid setting regd again
 220          */
 221         if (ah->regd_updated)
 222                 return 0;
 223
 224         /* firmware provides reg rules which are similar for 2 GHz and 5 GHz
 225          * pdev but 6 GHz pdev has superset of all rules including rules for
 226          * all bands, we prefer 6 GHz pdev's rules to be used for setup of
 227          * the wiphy regd.
 228          * If 6 GHz pdev was part of the ath12k_hw, wait for the 6 GHz pdev,
 229          * else pick the first pdev which calls this function and use its
 230          * regd to update global hw regd.
 231          * The regd_updated flag set at the end will not allow any further
 232          * updates.
 233          */
 234         if (ah->use_6ghz_regd && !ar->supports_6ghz)
 235                 return 0;
 236
 237         pdev_id = ar->pdev_idx;
 238
 239         spin_lock_bh(&ab->base_lock);
 240
 241         if (init) {
 242                 /* Apply the regd received during init through
 243                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
 244                  * receive the regd, initialize with a default world
 245                  * regulatory.
 246                  */
 247                 if (ab->default_regd[pdev_id]) {
 248                         regd = ab->default_regd[pdev_id];
 249                 } else {
 250                         ath12k_warn(ab,
 251                                     "failed to receive default regd during init\n");
 252                         regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
 253                 }
 254         } else {
 255                 regd = ab->new_regd[pdev_id];
 256         }
 257
 258         if (!regd) {
 259                 ret = -EINVAL;
 260                 spin_unlock_bh(&ab->base_lock);
 261                 goto err;
 262         }
 263
 264         regd_len = sizeof(*regd) + (regd->n_reg_rules *
 265                 sizeof(struct ieee80211_reg_rule));
 266
 267         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
 268         if (regd_copy)
 269                 ath12k_copy_regd(regd, regd_copy);
 270
 271         spin_unlock_bh(&ab->base_lock);
 272
 273         if (!regd_copy) {
 274                 ret = -ENOMEM;
 275                 goto err;
 276         }
 277
 278         rtnl_lock();
 279         wiphy_lock(hw->wiphy);
 280         ret = regulatory_set_wiphy_regd_sync(hw->wiphy, regd_copy);
 281         wiphy_unlock(hw->wiphy);
 282         rtnl_unlock();
 283
 284         kfree(regd_copy);
 285
 286         if (ret)
 287                 goto err;
 288
 289         if (ah->state != ATH12K_HW_STATE_ON)
 290                 goto skip;
 291
 292         ah->regd_updated = true;
 293         /* Apply the new regd to all the radios, this is expected to be received only once
 294          * since we check for ah->regd_updated and allow here only once.
 295          */
 296         for_each_ar(ah, ar, i) {
 297                 ab = ar->ab;
 298                 ret = ath12k_reg_update_chan_list(ar);
 299                 if (ret)
 300                         goto err;
 301         }
 302 skip:
 303         return 0;
 304 err:
 305         ath12k_warn(ab, "failed to perform regd update : %d\n", ret);
 306         return ret;
 307 }
 308
 309 static enum nl80211_dfs_regions
 310 ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
 311 {
 312         switch (dfs_region) {
 313         case ATH12K_DFS_REG_FCC:
 314         case ATH12K_DFS_REG_CN:
 315                 return NL80211_DFS_FCC;
 316         case ATH12K_DFS_REG_ETSI:
 317         case ATH12K_DFS_REG_KR:
 318                 return NL80211_DFS_ETSI;
 319         case ATH12K_DFS_REG_MKK:
 320         case ATH12K_DFS_REG_MKK_N:
 321                 return NL80211_DFS_JP;
 322         default:
 323                 return NL80211_DFS_UNSET;
 324         }
 325 }
 326
 327 static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
 328 {
 329         u32 flags = 0;
 330
 331         if (reg_flags & REGULATORY_CHAN_NO_IR)
 332                 flags = NL80211_RRF_NO_IR;
 333
 334         if (reg_flags & REGULATORY_CHAN_RADAR)
 335                 flags |= NL80211_RRF_DFS;
 336
 337         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
 338                 flags |= NL80211_RRF_NO_OFDM;
 339
 340         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
 341                 flags |= NL80211_RRF_NO_OUTDOOR;
 342
 343         if (reg_flags & REGULATORY_CHAN_NO_HT40)
 344                 flags |= NL80211_RRF_NO_HT40;
 345
 346         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
 347                 flags |= NL80211_RRF_NO_80MHZ;
 348
 349         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
 350                 flags |= NL80211_RRF_NO_160MHZ;
 351
 352         return flags;
 353 }
 354
 355 static u32 ath12k_map_fw_phy_flags(u32 phy_flags)
 356 {
 357         u32 flags = 0;
 358
 359         if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11AX)
 360                 flags |= NL80211_RRF_NO_HE;
 361
 362         if (phy_flags & ATH12K_REG_PHY_BITMAP_NO11BE)
 363                 flags |= NL80211_RRF_NO_EHT;
 364
 365         return flags;
 366 }
 367
 368 static bool
 369 ath12k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
 370                          struct ieee80211_reg_rule *rule2)
 371 {
 372         u32 start_freq1, end_freq1;
 373         u32 start_freq2, end_freq2;
 374
 375         start_freq1 = rule1->freq_range.start_freq_khz;
 376         start_freq2 = rule2->freq_range.start_freq_khz;
 377
 378         end_freq1 = rule1->freq_range.end_freq_khz;
 379         end_freq2 = rule2->freq_range.end_freq_khz;
 380
 381         if ((start_freq1 >= start_freq2 &&
 382              start_freq1 < end_freq2) ||
 383             (start_freq2 > start_freq1 &&
 384              start_freq2 < end_freq1))
 385                 return true;
 386
 387         /* TODO: Should we restrict intersection feasibility
 388          *  based on min bandwidth of the intersected region also,
 389          *  say the intersected rule should have a  min bandwidth
 390          * of 20MHz?
 391          */
 392
 393         return false;
 394 }
 395
 396 static void ath12k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
 397                                        struct ieee80211_reg_rule *rule2,
 398                                        struct ieee80211_reg_rule *new_rule)
 399 {
 400         u32 start_freq1, end_freq1;
 401         u32 start_freq2, end_freq2;
 402         u32 freq_diff, max_bw;
 403
 404         start_freq1 = rule1->freq_range.start_freq_khz;
 405         start_freq2 = rule2->freq_range.start_freq_khz;
 406
 407         end_freq1 = rule1->freq_range.end_freq_khz;
 408         end_freq2 = rule2->freq_range.end_freq_khz;
 409
 410         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
 411                                                     start_freq2);
 412         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
 413
 414         freq_diff = new_rule->freq_range.end_freq_khz -
 415                         new_rule->freq_range.start_freq_khz;
 416         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
 417                        rule2->freq_range.max_bandwidth_khz);
 418         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
 419
 420         new_rule->power_rule.max_antenna_gain =
 421                 min_t(u32, rule1->power_rule.max_antenna_gain,
 422                       rule2->power_rule.max_antenna_gain);
 423
 424         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
 425                                               rule2->power_rule.max_eirp);
 426
 427         /* Use the flags of both the rules */
 428         new_rule->flags = rule1->flags | rule2->flags;
 429
 430         /* To be safe, lts use the max cac timeout of both rules */
 431         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
 432                                      rule2->dfs_cac_ms);
 433 }
 434
 435 static struct ieee80211_regdomain *
 436 ath12k_regd_intersect(struct ieee80211_regdomain *default_regd,
 437                       struct ieee80211_regdomain *curr_regd)
 438 {
 439         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
 440         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
 441         struct ieee80211_regdomain *new_regd = NULL;
 442         u8 i, j, k;
 443
 444         num_old_regd_rules = default_regd->n_reg_rules;
 445         num_curr_regd_rules = curr_regd->n_reg_rules;
 446         num_new_regd_rules = 0;
 447
 448         /* Find the number of intersecting rules to allocate new regd memory */
 449         for (i = 0; i < num_old_regd_rules; i++) {
 450                 old_rule = default_regd->reg_rules + i;
 451                 for (j = 0; j < num_curr_regd_rules; j++) {
 452                         curr_rule = curr_regd->reg_rules + j;
 453
 454                         if (ath12k_reg_can_intersect(old_rule, curr_rule))
 455                                 num_new_regd_rules++;
 456                 }
 457         }
 458
 459         if (!num_new_regd_rules)
 460                 return NULL;
 461
 462         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
 463                         sizeof(struct ieee80211_reg_rule)),
 464                         GFP_ATOMIC);
 465
 466         if (!new_regd)
 467                 return NULL;
 468
 469         /* We set the new country and dfs region directly and only trim
 470          * the freq, power, antenna gain by intersecting with the
 471          * default regdomain. Also MAX of the dfs cac timeout is selected.
 472          */
 473         new_regd->n_reg_rules = num_new_regd_rules;
 474         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
 475         new_regd->dfs_region = curr_regd->dfs_region;
 476         new_rule = new_regd->reg_rules;
 477
 478         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
 479                 old_rule = default_regd->reg_rules + i;
 480                 for (j = 0; j < num_curr_regd_rules; j++) {
 481                         curr_rule = curr_regd->reg_rules + j;
 482
 483                         if (ath12k_reg_can_intersect(old_rule, curr_rule))
 484                                 ath12k_reg_intersect_rules(old_rule, curr_rule,
 485                                                            (new_rule + k++));
 486                 }
 487         }
 488         return new_regd;
 489 }
 490
 491 static const char *
 492 ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
 493 {
 494         switch (dfs_region) {
 495         case NL80211_DFS_FCC:
 496                 return "FCC";
 497         case NL80211_DFS_ETSI:
 498                 return "ETSI";
 499         case NL80211_DFS_JP:
 500                 return "JP";
 501         default:
 502                 return "UNSET";
 503         }
 504 }
 505
 506 static u16
 507 ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
 508 {
 509         u16 bw;
 510
 511         bw = end_freq - start_freq;
 512         bw = min_t(u16, bw, max_bw);
 513
 514         if (bw >= 80 && bw < 160)
 515                 bw = 80;
 516         else if (bw >= 40 && bw < 80)
 517                 bw = 40;
 518         else if (bw < 40)
 519                 bw = 20;
 520
 521         return bw;
 522 }
 523
 524 static void
 525 ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
 526                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
 527                        u32 reg_flags)
 528 {
 529         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
 530         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
 531         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
 532         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
 533         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
 534         reg_rule->flags = reg_flags;
 535 }
 536
 537 static void
 538 ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
 539                                      struct ieee80211_regdomain *regd,
 540                                      struct ath12k_reg_rule *reg_rule,
 541                                      u8 *rule_idx, u32 flags, u16 max_bw)
 542 {
 543         u32 end_freq;
 544         u16 bw;
 545         u8 i;
 546
 547         i = *rule_idx;
 548
 549         bw = ath12k_reg_adjust_bw(reg_rule->start_freq,
 550                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
 551
 552         ath12k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
 553                                ETSI_WEATHER_RADAR_BAND_LOW, bw,
 554                                reg_rule->ant_gain, reg_rule->reg_power,
 555                                flags);
 556
 557         ath12k_dbg(ab, ATH12K_DBG_REG,
 558                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 559                    i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
 560                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 561                    regd->reg_rules[i].dfs_cac_ms,
 562                    flags);
 563
 564         if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
 565                 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
 566         else
 567                 end_freq = reg_rule->end_freq;
 568
 569         bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 570                                   max_bw);
 571
 572         i++;
 573
 574         ath12k_reg_update_rule(regd->reg_rules + i,
 575                                ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
 576                                reg_rule->ant_gain, reg_rule->reg_power,
 577                                flags);
 578
 579         regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
 580
 581         ath12k_dbg(ab, ATH12K_DBG_REG,
 582                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 583                    i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 584                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 585                    regd->reg_rules[i].dfs_cac_ms,
 586                    flags);
 587
 588         if (end_freq == reg_rule->end_freq) {
 589                 regd->n_reg_rules--;
 590                 *rule_idx = i;
 591                 return;
 592         }
 593
 594         bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
 595                                   reg_rule->end_freq, max_bw);
 596
 597         i++;
 598
 599         ath12k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
 600                                reg_rule->end_freq, bw,
 601                                reg_rule->ant_gain, reg_rule->reg_power,
 602                                flags);
 603
 604         ath12k_dbg(ab, ATH12K_DBG_REG,
 605                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 606                    i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
 607                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 608                    regd->reg_rules[i].dfs_cac_ms,
 609                    flags);
 610
 611         *rule_idx = i;
 612 }
 613
 614 struct ieee80211_regdomain *
 615 ath12k_reg_build_regd(struct ath12k_base *ab,
 616                       struct ath12k_reg_info *reg_info, bool intersect)
 617 {
 618         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
 619         struct ath12k_reg_rule *reg_rule;
 620         u8 i = 0, j = 0, k = 0;
 621         u8 num_rules;
 622         u16 max_bw;
 623         u32 flags;
 624         char alpha2[3];
 625
 626         num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
 627
 628         /* FIXME: Currently taking reg rules for 6G only from Indoor AP mode list.
 629          * This can be updated to choose the combination dynamically based on AP
 630          * type and client type, after complete 6G regulatory support is added.
 631          */
 632         if (reg_info->is_ext_reg_event)
 633                 num_rules += reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP];
 634
 635         if (!num_rules)
 636                 goto ret;
 637
 638         /* Add max additional rules to accommodate weather radar band */
 639         if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
 640                 num_rules += 2;
 641
 642         tmp_regd = kzalloc(sizeof(*tmp_regd) +
 643                            (num_rules * sizeof(struct ieee80211_reg_rule)),
 644                            GFP_ATOMIC);
 645         if (!tmp_regd)
 646                 goto ret;
 647
 648         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 649         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 650         alpha2[2] = '\0';
 651         tmp_regd->dfs_region = ath12k_map_fw_dfs_region(reg_info->dfs_region);
 652
 653         ath12k_dbg(ab, ATH12K_DBG_REG,
 654                    "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
 655                    alpha2, ath12k_reg_get_regdom_str(tmp_regd->dfs_region),
 656                    reg_info->dfs_region, num_rules);
 657         /* Update reg_rules[] below. Firmware is expected to
 658          * send these rules in order(2G rules first and then 5G)
 659          */
 660         for (; i < num_rules; i++) {
 661                 if (reg_info->num_2g_reg_rules &&
 662                     (i < reg_info->num_2g_reg_rules)) {
 663                         reg_rule = reg_info->reg_rules_2g_ptr + i;
 664                         max_bw = min_t(u16, reg_rule->max_bw,
 665                                        reg_info->max_bw_2g);
 666                         flags = 0;
 667                 } else if (reg_info->num_5g_reg_rules &&
 668                            (j < reg_info->num_5g_reg_rules)) {
 669                         reg_rule = reg_info->reg_rules_5g_ptr + j++;
 670                         max_bw = min_t(u16, reg_rule->max_bw,
 671                                        reg_info->max_bw_5g);
 672
 673                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
 674                          * BW Auto correction, we can enable this by default
 675                          * for all 5G rules here. The regulatory core performs
 676                          * BW correction if required and applies flags as
 677                          * per other BW rule flags we pass from here
 678                          */
 679                         flags = NL80211_RRF_AUTO_BW;
 680                 } else if (reg_info->is_ext_reg_event &&
 681                            reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP] &&
 682                         (k < reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP])) {
 683                         reg_rule = reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP] + k++;
 684                         max_bw = min_t(u16, reg_rule->max_bw,
 685                                        reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP]);
 686                         flags = NL80211_RRF_AUTO_BW;
 687                 } else {
 688                         break;
 689                 }
 690
 691                 flags |= ath12k_map_fw_reg_flags(reg_rule->flags);
 692                 flags |= ath12k_map_fw_phy_flags(reg_info->phybitmap);
 693
 694                 ath12k_reg_update_rule(tmp_regd->reg_rules + i,
 695                                        reg_rule->start_freq,
 696                                        reg_rule->end_freq, max_bw,
 697                                        reg_rule->ant_gain, reg_rule->reg_power,
 698                                        flags);
 699
 700                 /* Update dfs cac timeout if the dfs domain is ETSI and the
 701                  * new rule covers weather radar band.
 702                  * Default value of '0' corresponds to 60s timeout, so no
 703                  * need to update that for other rules.
 704                  */
 705                 if (flags & NL80211_RRF_DFS &&
 706                     reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
 707                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
 708                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
 709                         ath12k_reg_update_weather_radar_band(ab, tmp_regd,
 710                                                              reg_rule, &i,
 711                                                              flags, max_bw);
 712                         continue;
 713                 }
 714
 715                 if (reg_info->is_ext_reg_event) {
 716                         ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
 717                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 718                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 719                                    tmp_regd->reg_rules[i].dfs_cac_ms,
 720                                    flags, reg_rule->psd_flag, reg_rule->psd_eirp);
 721                 } else {
 722                         ath12k_dbg(ab, ATH12K_DBG_REG,
 723                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 724                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 725                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 726                                    tmp_regd->reg_rules[i].dfs_cac_ms,
 727                                    flags);
 728                 }
 729         }
 730
 731         tmp_regd->n_reg_rules = i;
 732
 733         if (intersect) {
 734                 default_regd = ab->default_regd[reg_info->phy_id];
 735
 736                 /* Get a new regd by intersecting the received regd with
 737                  * our default regd.
 738                  */
 739                 new_regd = ath12k_regd_intersect(default_regd, tmp_regd);
 740                 kfree(tmp_regd);
 741                 if (!new_regd) {
 742                         ath12k_warn(ab, "Unable to create intersected regdomain\n");
 743                         goto ret;
 744                 }
 745         } else {
 746                 new_regd = tmp_regd;
 747         }
 748
 749 ret:
 750         return new_regd;
 751 }
 752
 753 void ath12k_regd_update_work(struct work_struct *work)
 754 {
 755         struct ath12k *ar = container_of(work, struct ath12k,
 756                                          regd_update_work);
 757         int ret;
 758
 759         ret = ath12k_regd_update(ar, false);
 760         if (ret) {
 761                 /* Firmware has already moved to the new regd. We need
 762                  * to maintain channel consistency across FW, Host driver
 763                  * and userspace. Hence as a fallback mechanism we can set
 764                  * the prev or default country code to the firmware.
 765                  */
 766                 /* TODO: Implement Fallback Mechanism */
 767         }
 768 }
 769
 770 void ath12k_reg_init(struct ieee80211_hw *hw)
 771 {
 772         hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
 773         hw->wiphy->reg_notifier = ath12k_reg_notifier;
 774 }
 775
 776 void ath12k_reg_free(struct ath12k_base *ab)
 777 {
 778         int i;
 779
 780         for (i = 0; i < ab->hw_params->max_radios; i++) {
 781                 kfree(ab->default_regd[i]);
 782                 kfree(ab->new_regd[i]);
 783         }
 784 }