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) 2021-2022 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 ath12k *ar, char *alpha2)
  32 {
  33         const struct ieee80211_regdomain *regd;
  34
  35         regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
  36         /* This can happen during wiphy registration where the previous
  37          * user request is received before we update the regd received
  38          * from firmware.
  39          */
  40         if (!regd)
  41                 return true;
  42
  43         return memcmp(regd->alpha2, alpha2, 2) != 0;
  44 }
  45
  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 *ar = hw->priv;
  52         int ret;
  53
  54         ath12k_dbg(ar->ab, ATH12K_DBG_REG,
  55                    "Regulatory Notification received for %s\n", wiphy_name(wiphy));
  56
  57         /* Currently supporting only General User Hints. Cell base user
  58          * hints to be handled later.
  59          * Hints from other sources like Core, Beacons are not expected for
  60          * self managed wiphy's
  61          */
  62         if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
  63               request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
  64                 ath12k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
  65                 return;
  66         }
  67
  68         if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
  69                 ath12k_dbg(ar->ab, ATH12K_DBG_REG,
  70                            "Country Setting is not allowed\n");
  71                 return;
  72         }
  73
  74         if (!ath12k_regdom_changes(ar, request->alpha2)) {
  75                 ath12k_dbg(ar->ab, ATH12K_DBG_REG, "Country is already set\n");
  76                 return;
  77         }
  78
  79         /* Set the country code to the firmware and wait for
  80          * the WMI_REG_CHAN_LIST_CC EVENT for updating the
  81          * reg info
  82          */
  83         arg.flags = ALPHA_IS_SET;
  84         memcpy(&arg.cc_info.alpha2, request->alpha2, 2);
  85         arg.cc_info.alpha2[2] = 0;
  86
  87         ret = ath12k_wmi_send_init_country_cmd(ar, &arg);
  88         if (ret)
  89                 ath12k_warn(ar->ab,
  90                             "INIT Country code set to fw failed : %d\n", ret);
  91 }
  92
  93 int ath12k_reg_update_chan_list(struct ath12k *ar)
  94 {
  95         struct ieee80211_supported_band **bands;
  96         struct ath12k_wmi_scan_chan_list_arg *arg;
  97         struct ieee80211_channel *channel;
  98         struct ieee80211_hw *hw = ar->hw;
  99         struct ath12k_wmi_channel_arg *ch;
 100         enum nl80211_band band;
 101         int num_channels = 0;
 102         int i, ret;
 103
 104         bands = hw->wiphy->bands;
 105         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 106                 if (!bands[band])
 107                         continue;
 108
 109                 for (i = 0; i < bands[band]->n_channels; i++) {
 110                         if (bands[band]->channels[i].flags &
 111                             IEEE80211_CHAN_DISABLED)
 112                                 continue;
 113
 114                         num_channels++;
 115                 }
 116         }
 117
 118         if (WARN_ON(!num_channels))
 119                 return -EINVAL;
 120
 121         arg = kzalloc(struct_size(arg, channel, num_channels), GFP_KERNEL);
 122
 123         if (!arg)
 124                 return -ENOMEM;
 125
 126         arg->pdev_id = ar->pdev->pdev_id;
 127         arg->nallchans = num_channels;
 128
 129         ch = arg->channel;
 130
 131         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 132                 if (!bands[band])
 133                         continue;
 134
 135                 for (i = 0; i < bands[band]->n_channels; i++) {
 136                         channel = &bands[band]->channels[i];
 137
 138                         if (channel->flags & IEEE80211_CHAN_DISABLED)
 139                                 continue;
 140
 141                         /* TODO: Set to true/false based on some condition? */
 142                         ch->allow_ht = true;
 143                         ch->allow_vht = true;
 144                         ch->allow_he = true;
 145
 146                         ch->dfs_set =
 147                                 !!(channel->flags & IEEE80211_CHAN_RADAR);
 148                         ch->is_chan_passive = !!(channel->flags &
 149                                                 IEEE80211_CHAN_NO_IR);
 150                         ch->is_chan_passive |= ch->dfs_set;
 151                         ch->mhz = channel->center_freq;
 152                         ch->cfreq1 = channel->center_freq;
 153                         ch->minpower = 0;
 154                         ch->maxpower = channel->max_power * 2;
 155                         ch->maxregpower = channel->max_reg_power * 2;
 156                         ch->antennamax = channel->max_antenna_gain * 2;
 157
 158                         /* TODO: Use appropriate phymodes */
 159                         if (channel->band == NL80211_BAND_2GHZ)
 160                                 ch->phy_mode = MODE_11G;
 161                         else
 162                                 ch->phy_mode = MODE_11A;
 163
 164                         if (channel->band == NL80211_BAND_6GHZ &&
 165                             cfg80211_channel_is_psc(channel))
 166                                 ch->psc_channel = true;
 167
 168                         ath12k_dbg(ar->ab, ATH12K_DBG_WMI,
 169                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
 170                                    i, arg->nallchans,
 171                                    ch->mhz, ch->maxpower, ch->maxregpower,
 172                                    ch->antennamax, ch->phy_mode);
 173
 174                         ch++;
 175                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
 176                          * set_agile, reg_class_idx
 177                          */
 178                 }
 179         }
 180
 181         ret = ath12k_wmi_send_scan_chan_list_cmd(ar, arg);
 182         kfree(arg);
 183
 184         return ret;
 185 }
 186
 187 static void ath12k_copy_regd(struct ieee80211_regdomain *regd_orig,
 188                              struct ieee80211_regdomain *regd_copy)
 189 {
 190         u8 i;
 191
 192         /* The caller should have checked error conditions */
 193         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
 194
 195         for (i = 0; i < regd_orig->n_reg_rules; i++)
 196                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
 197                        sizeof(struct ieee80211_reg_rule));
 198 }
 199
 200 int ath12k_regd_update(struct ath12k *ar, bool init)
 201 {
 202         struct ieee80211_regdomain *regd, *regd_copy = NULL;
 203         int ret, regd_len, pdev_id;
 204         struct ath12k_base *ab;
 205
 206         ab = ar->ab;
 207         pdev_id = ar->pdev_idx;
 208
 209         spin_lock_bh(&ab->base_lock);
 210
 211         if (init) {
 212                 /* Apply the regd received during init through
 213                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
 214                  * receive the regd, initialize with a default world
 215                  * regulatory.
 216                  */
 217                 if (ab->default_regd[pdev_id]) {
 218                         regd = ab->default_regd[pdev_id];
 219                 } else {
 220                         ath12k_warn(ab,
 221                                     "failed to receive default regd during init\n");
 222                         regd = (struct ieee80211_regdomain *)&ath12k_world_regd;
 223                 }
 224         } else {
 225                 regd = ab->new_regd[pdev_id];
 226         }
 227
 228         if (!regd) {
 229                 ret = -EINVAL;
 230                 spin_unlock_bh(&ab->base_lock);
 231                 goto err;
 232         }
 233
 234         regd_len = sizeof(*regd) + (regd->n_reg_rules *
 235                 sizeof(struct ieee80211_reg_rule));
 236
 237         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
 238         if (regd_copy)
 239                 ath12k_copy_regd(regd, regd_copy);
 240
 241         spin_unlock_bh(&ab->base_lock);
 242
 243         if (!regd_copy) {
 244                 ret = -ENOMEM;
 245                 goto err;
 246         }
 247
 248         rtnl_lock();
 249         wiphy_lock(ar->hw->wiphy);
 250         ret = regulatory_set_wiphy_regd_sync(ar->hw->wiphy, regd_copy);
 251         wiphy_unlock(ar->hw->wiphy);
 252         rtnl_unlock();
 253
 254         kfree(regd_copy);
 255
 256         if (ret)
 257                 goto err;
 258
 259         if (ar->state == ATH12K_STATE_ON) {
 260                 ret = ath12k_reg_update_chan_list(ar);
 261                 if (ret)
 262                         goto err;
 263         }
 264
 265         return 0;
 266 err:
 267         ath12k_warn(ab, "failed to perform regd update : %d\n", ret);
 268         return ret;
 269 }
 270
 271 static enum nl80211_dfs_regions
 272 ath12k_map_fw_dfs_region(enum ath12k_dfs_region dfs_region)
 273 {
 274         switch (dfs_region) {
 275         case ATH12K_DFS_REG_FCC:
 276         case ATH12K_DFS_REG_CN:
 277                 return NL80211_DFS_FCC;
 278         case ATH12K_DFS_REG_ETSI:
 279         case ATH12K_DFS_REG_KR:
 280                 return NL80211_DFS_ETSI;
 281         case ATH12K_DFS_REG_MKK:
 282         case ATH12K_DFS_REG_MKK_N:
 283                 return NL80211_DFS_JP;
 284         default:
 285                 return NL80211_DFS_UNSET;
 286         }
 287 }
 288
 289 static u32 ath12k_map_fw_reg_flags(u16 reg_flags)
 290 {
 291         u32 flags = 0;
 292
 293         if (reg_flags & REGULATORY_CHAN_NO_IR)
 294                 flags = NL80211_RRF_NO_IR;
 295
 296         if (reg_flags & REGULATORY_CHAN_RADAR)
 297                 flags |= NL80211_RRF_DFS;
 298
 299         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
 300                 flags |= NL80211_RRF_NO_OFDM;
 301
 302         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
 303                 flags |= NL80211_RRF_NO_OUTDOOR;
 304
 305         if (reg_flags & REGULATORY_CHAN_NO_HT40)
 306                 flags |= NL80211_RRF_NO_HT40;
 307
 308         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
 309                 flags |= NL80211_RRF_NO_80MHZ;
 310
 311         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
 312                 flags |= NL80211_RRF_NO_160MHZ;
 313
 314         return flags;
 315 }
 316
 317 static bool
 318 ath12k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
 319                          struct ieee80211_reg_rule *rule2)
 320 {
 321         u32 start_freq1, end_freq1;
 322         u32 start_freq2, end_freq2;
 323
 324         start_freq1 = rule1->freq_range.start_freq_khz;
 325         start_freq2 = rule2->freq_range.start_freq_khz;
 326
 327         end_freq1 = rule1->freq_range.end_freq_khz;
 328         end_freq2 = rule2->freq_range.end_freq_khz;
 329
 330         if ((start_freq1 >= start_freq2 &&
 331              start_freq1 < end_freq2) ||
 332             (start_freq2 > start_freq1 &&
 333              start_freq2 < end_freq1))
 334                 return true;
 335
 336         /* TODO: Should we restrict intersection feasibility
 337          *  based on min bandwidth of the intersected region also,
 338          *  say the intersected rule should have a  min bandwidth
 339          * of 20MHz?
 340          */
 341
 342         return false;
 343 }
 344
 345 static void ath12k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
 346                                        struct ieee80211_reg_rule *rule2,
 347                                        struct ieee80211_reg_rule *new_rule)
 348 {
 349         u32 start_freq1, end_freq1;
 350         u32 start_freq2, end_freq2;
 351         u32 freq_diff, max_bw;
 352
 353         start_freq1 = rule1->freq_range.start_freq_khz;
 354         start_freq2 = rule2->freq_range.start_freq_khz;
 355
 356         end_freq1 = rule1->freq_range.end_freq_khz;
 357         end_freq2 = rule2->freq_range.end_freq_khz;
 358
 359         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
 360                                                     start_freq2);
 361         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
 362
 363         freq_diff = new_rule->freq_range.end_freq_khz -
 364                         new_rule->freq_range.start_freq_khz;
 365         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
 366                        rule2->freq_range.max_bandwidth_khz);
 367         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
 368
 369         new_rule->power_rule.max_antenna_gain =
 370                 min_t(u32, rule1->power_rule.max_antenna_gain,
 371                       rule2->power_rule.max_antenna_gain);
 372
 373         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
 374                                               rule2->power_rule.max_eirp);
 375
 376         /* Use the flags of both the rules */
 377         new_rule->flags = rule1->flags | rule2->flags;
 378
 379         /* To be safe, lts use the max cac timeout of both rules */
 380         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
 381                                      rule2->dfs_cac_ms);
 382 }
 383
 384 static struct ieee80211_regdomain *
 385 ath12k_regd_intersect(struct ieee80211_regdomain *default_regd,
 386                       struct ieee80211_regdomain *curr_regd)
 387 {
 388         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
 389         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
 390         struct ieee80211_regdomain *new_regd = NULL;
 391         u8 i, j, k;
 392
 393         num_old_regd_rules = default_regd->n_reg_rules;
 394         num_curr_regd_rules = curr_regd->n_reg_rules;
 395         num_new_regd_rules = 0;
 396
 397         /* Find the number of intersecting rules to allocate new regd memory */
 398         for (i = 0; i < num_old_regd_rules; i++) {
 399                 old_rule = default_regd->reg_rules + i;
 400                 for (j = 0; j < num_curr_regd_rules; j++) {
 401                         curr_rule = curr_regd->reg_rules + j;
 402
 403                         if (ath12k_reg_can_intersect(old_rule, curr_rule))
 404                                 num_new_regd_rules++;
 405                 }
 406         }
 407
 408         if (!num_new_regd_rules)
 409                 return NULL;
 410
 411         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
 412                         sizeof(struct ieee80211_reg_rule)),
 413                         GFP_ATOMIC);
 414
 415         if (!new_regd)
 416                 return NULL;
 417
 418         /* We set the new country and dfs region directly and only trim
 419          * the freq, power, antenna gain by intersecting with the
 420          * default regdomain. Also MAX of the dfs cac timeout is selected.
 421          */
 422         new_regd->n_reg_rules = num_new_regd_rules;
 423         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
 424         new_regd->dfs_region = curr_regd->dfs_region;
 425         new_rule = new_regd->reg_rules;
 426
 427         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
 428                 old_rule = default_regd->reg_rules + i;
 429                 for (j = 0; j < num_curr_regd_rules; j++) {
 430                         curr_rule = curr_regd->reg_rules + j;
 431
 432                         if (ath12k_reg_can_intersect(old_rule, curr_rule))
 433                                 ath12k_reg_intersect_rules(old_rule, curr_rule,
 434                                                            (new_rule + k++));
 435                 }
 436         }
 437         return new_regd;
 438 }
 439
 440 static const char *
 441 ath12k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
 442 {
 443         switch (dfs_region) {
 444         case NL80211_DFS_FCC:
 445                 return "FCC";
 446         case NL80211_DFS_ETSI:
 447                 return "ETSI";
 448         case NL80211_DFS_JP:
 449                 return "JP";
 450         default:
 451                 return "UNSET";
 452         }
 453 }
 454
 455 static u16
 456 ath12k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
 457 {
 458         u16 bw;
 459
 460         bw = end_freq - start_freq;
 461         bw = min_t(u16, bw, max_bw);
 462
 463         if (bw >= 80 && bw < 160)
 464                 bw = 80;
 465         else if (bw >= 40 && bw < 80)
 466                 bw = 40;
 467         else if (bw < 40)
 468                 bw = 20;
 469
 470         return bw;
 471 }
 472
 473 static void
 474 ath12k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
 475                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
 476                        u32 reg_flags)
 477 {
 478         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
 479         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
 480         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
 481         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
 482         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
 483         reg_rule->flags = reg_flags;
 484 }
 485
 486 static void
 487 ath12k_reg_update_weather_radar_band(struct ath12k_base *ab,
 488                                      struct ieee80211_regdomain *regd,
 489                                      struct ath12k_reg_rule *reg_rule,
 490                                      u8 *rule_idx, u32 flags, u16 max_bw)
 491 {
 492         u32 end_freq;
 493         u16 bw;
 494         u8 i;
 495
 496         i = *rule_idx;
 497
 498         bw = ath12k_reg_adjust_bw(reg_rule->start_freq,
 499                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
 500
 501         ath12k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
 502                                ETSI_WEATHER_RADAR_BAND_LOW, bw,
 503                                reg_rule->ant_gain, reg_rule->reg_power,
 504                                flags);
 505
 506         ath12k_dbg(ab, ATH12K_DBG_REG,
 507                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 508                    i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
 509                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 510                    regd->reg_rules[i].dfs_cac_ms,
 511                    flags);
 512
 513         if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
 514                 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
 515         else
 516                 end_freq = reg_rule->end_freq;
 517
 518         bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 519                                   max_bw);
 520
 521         i++;
 522
 523         ath12k_reg_update_rule(regd->reg_rules + i,
 524                                ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
 525                                reg_rule->ant_gain, reg_rule->reg_power,
 526                                flags);
 527
 528         regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
 529
 530         ath12k_dbg(ab, ATH12K_DBG_REG,
 531                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 532                    i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 533                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 534                    regd->reg_rules[i].dfs_cac_ms,
 535                    flags);
 536
 537         if (end_freq == reg_rule->end_freq) {
 538                 regd->n_reg_rules--;
 539                 *rule_idx = i;
 540                 return;
 541         }
 542
 543         bw = ath12k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
 544                                   reg_rule->end_freq, max_bw);
 545
 546         i++;
 547
 548         ath12k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
 549                                reg_rule->end_freq, bw,
 550                                reg_rule->ant_gain, reg_rule->reg_power,
 551                                flags);
 552
 553         ath12k_dbg(ab, ATH12K_DBG_REG,
 554                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 555                    i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
 556                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 557                    regd->reg_rules[i].dfs_cac_ms,
 558                    flags);
 559
 560         *rule_idx = i;
 561 }
 562
 563 struct ieee80211_regdomain *
 564 ath12k_reg_build_regd(struct ath12k_base *ab,
 565                       struct ath12k_reg_info *reg_info, bool intersect)
 566 {
 567         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
 568         struct ath12k_reg_rule *reg_rule;
 569         u8 i = 0, j = 0, k = 0;
 570         u8 num_rules;
 571         u16 max_bw;
 572         u32 flags;
 573         char alpha2[3];
 574
 575         num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
 576
 577         /* FIXME: Currently taking reg rules for 6G only from Indoor AP mode list.
 578          * This can be updated to choose the combination dynamically based on AP
 579          * type and client type, after complete 6G regulatory support is added.
 580          */
 581         if (reg_info->is_ext_reg_event)
 582                 num_rules += reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP];
 583
 584         if (!num_rules)
 585                 goto ret;
 586
 587         /* Add max additional rules to accommodate weather radar band */
 588         if (reg_info->dfs_region == ATH12K_DFS_REG_ETSI)
 589                 num_rules += 2;
 590
 591         tmp_regd = kzalloc(sizeof(*tmp_regd) +
 592                            (num_rules * sizeof(struct ieee80211_reg_rule)),
 593                            GFP_ATOMIC);
 594         if (!tmp_regd)
 595                 goto ret;
 596
 597         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 598         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 599         alpha2[2] = '\0';
 600         tmp_regd->dfs_region = ath12k_map_fw_dfs_region(reg_info->dfs_region);
 601
 602         ath12k_dbg(ab, ATH12K_DBG_REG,
 603                    "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
 604                    alpha2, ath12k_reg_get_regdom_str(tmp_regd->dfs_region),
 605                    reg_info->dfs_region, num_rules);
 606         /* Update reg_rules[] below. Firmware is expected to
 607          * send these rules in order(2G rules first and then 5G)
 608          */
 609         for (; i < num_rules; i++) {
 610                 if (reg_info->num_2g_reg_rules &&
 611                     (i < reg_info->num_2g_reg_rules)) {
 612                         reg_rule = reg_info->reg_rules_2g_ptr + i;
 613                         max_bw = min_t(u16, reg_rule->max_bw,
 614                                        reg_info->max_bw_2g);
 615                         flags = 0;
 616                 } else if (reg_info->num_5g_reg_rules &&
 617                            (j < reg_info->num_5g_reg_rules)) {
 618                         reg_rule = reg_info->reg_rules_5g_ptr + j++;
 619                         max_bw = min_t(u16, reg_rule->max_bw,
 620                                        reg_info->max_bw_5g);
 621
 622                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
 623                          * BW Auto correction, we can enable this by default
 624                          * for all 5G rules here. The regulatory core performs
 625                          * BW correction if required and applies flags as
 626                          * per other BW rule flags we pass from here
 627                          */
 628                         flags = NL80211_RRF_AUTO_BW;
 629                 } else if (reg_info->is_ext_reg_event &&
 630                            reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP] &&
 631                         (k < reg_info->num_6g_reg_rules_ap[WMI_REG_INDOOR_AP])) {
 632                         reg_rule = reg_info->reg_rules_6g_ap_ptr[WMI_REG_INDOOR_AP] + k++;
 633                         max_bw = min_t(u16, reg_rule->max_bw,
 634                                        reg_info->max_bw_6g_ap[WMI_REG_INDOOR_AP]);
 635                         flags = NL80211_RRF_AUTO_BW;
 636                 } else {
 637                         break;
 638                 }
 639
 640                 flags |= ath12k_map_fw_reg_flags(reg_rule->flags);
 641
 642                 ath12k_reg_update_rule(tmp_regd->reg_rules + i,
 643                                        reg_rule->start_freq,
 644                                        reg_rule->end_freq, max_bw,
 645                                        reg_rule->ant_gain, reg_rule->reg_power,
 646                                        flags);
 647
 648                 /* Update dfs cac timeout if the dfs domain is ETSI and the
 649                  * new rule covers weather radar band.
 650                  * Default value of '0' corresponds to 60s timeout, so no
 651                  * need to update that for other rules.
 652                  */
 653                 if (flags & NL80211_RRF_DFS &&
 654                     reg_info->dfs_region == ATH12K_DFS_REG_ETSI &&
 655                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
 656                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
 657                         ath12k_reg_update_weather_radar_band(ab, tmp_regd,
 658                                                              reg_rule, &i,
 659                                                              flags, max_bw);
 660                         continue;
 661                 }
 662
 663                 if (reg_info->is_ext_reg_event) {
 664                         ath12k_dbg(ab, ATH12K_DBG_REG, "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
 665                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 666                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 667                                    tmp_regd->reg_rules[i].dfs_cac_ms,
 668                                    flags, reg_rule->psd_flag, reg_rule->psd_eirp);
 669                 } else {
 670                         ath12k_dbg(ab, ATH12K_DBG_REG,
 671                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 672                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 673                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 674                                    tmp_regd->reg_rules[i].dfs_cac_ms,
 675                                    flags);
 676                 }
 677         }
 678
 679         tmp_regd->n_reg_rules = i;
 680
 681         if (intersect) {
 682                 default_regd = ab->default_regd[reg_info->phy_id];
 683
 684                 /* Get a new regd by intersecting the received regd with
 685                  * our default regd.
 686                  */
 687                 new_regd = ath12k_regd_intersect(default_regd, tmp_regd);
 688                 kfree(tmp_regd);
 689                 if (!new_regd) {
 690                         ath12k_warn(ab, "Unable to create intersected regdomain\n");
 691                         goto ret;
 692                 }
 693         } else {
 694                 new_regd = tmp_regd;
 695         }
 696
 697 ret:
 698         return new_regd;
 699 }
 700
 701 void ath12k_regd_update_work(struct work_struct *work)
 702 {
 703         struct ath12k *ar = container_of(work, struct ath12k,
 704                                          regd_update_work);
 705         int ret;
 706
 707         ret = ath12k_regd_update(ar, false);
 708         if (ret) {
 709                 /* Firmware has already moved to the new regd. We need
 710                  * to maintain channel consistency across FW, Host driver
 711                  * and userspace. Hence as a fallback mechanism we can set
 712                  * the prev or default country code to the firmware.
 713                  */
 714                 /* TODO: Implement Fallback Mechanism */
 715         }
 716 }
 717
 718 void ath12k_reg_init(struct ath12k *ar)
 719 {
 720         ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
 721         ar->hw->wiphy->reg_notifier = ath12k_reg_notifier;
 722 }
 723
 724 void ath12k_reg_free(struct ath12k_base *ab)
 725 {
 726         int i;
 727
 728         for (i = 0; i < ab->hw_params->max_radios; i++) {
 729                 kfree(ab->default_regd[i]);
 730                 kfree(ab->new_regd[i]);
 731         }
 732 }