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  */
   5 #include "core.h"
   6 #include "debug.h"
   7
   8 /* World regdom to be used in case default regd from fw is unavailable */
   9 #define ATH11K_2GHZ_CH01_11      REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
  10 #define ATH11K_5GHZ_5150_5350    REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
  11                                           NL80211_RRF_NO_IR)
  12 #define ATH11K_5GHZ_5725_5850    REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
  13                                           NL80211_RRF_NO_IR)
  14
  15 #define ETSI_WEATHER_RADAR_BAND_LOW             5590
  16 #define ETSI_WEATHER_RADAR_BAND_HIGH            5650
  17 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT     600000
  18
  19 static const struct ieee80211_regdomain ath11k_world_regd = {
  20         .n_reg_rules = 3,
  21         .alpha2 =  "00",
  22         .reg_rules = {
  23                 ATH11K_2GHZ_CH01_11,
  24                 ATH11K_5GHZ_5150_5350,
  25                 ATH11K_5GHZ_5725_5850,
  26         }
  27 };
  28
  29 static bool ath11k_regdom_changes(struct ath11k *ar, char *alpha2)
  30 {
  31         const struct ieee80211_regdomain *regd;
  32
  33         regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
  34         /* This can happen during wiphy registration where the previous
  35          * user request is received before we update the regd received
  36          * from firmware.
  37          */
  38         if (!regd)
  39                 return true;
  40
  41         return memcmp(regd->alpha2, alpha2, 2) != 0;
  42 }
  43
  44 static void
  45 ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
  46 {
  47         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
  48         struct wmi_init_country_params init_country_param;
  49         struct ath11k *ar = hw->priv;
  50         int ret;
  51
  52         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
  53                    "Regulatory Notification received for %s\n", wiphy_name(wiphy));
  54
  55         /* Currently supporting only General User Hints. Cell base user
  56          * hints to be handled later.
  57          * Hints from other sources like Core, Beacons are not expected for
  58          * self managed wiphy's
  59          */
  60         if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
  61               request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
  62                 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
  63                 return;
  64         }
  65
  66         if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
  67                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
  68                            "Country Setting is not allowed\n");
  69                 return;
  70         }
  71
  72         if (!ath11k_regdom_changes(ar, request->alpha2)) {
  73                 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
  74                 return;
  75         }
  76
  77         /* Set the country code to the firmware and wait for
  78          * the WMI_REG_CHAN_LIST_CC EVENT for updating the
  79          * reg info
  80          */
  81         init_country_param.flags = ALPHA_IS_SET;
  82         memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
  83
  84         ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
  85         if (ret)
  86                 ath11k_warn(ar->ab,
  87                             "INIT Country code set to fw failed : %d\n", ret);
  88 }
  89
  90 int ath11k_reg_update_chan_list(struct ath11k *ar)
  91 {
  92         struct ieee80211_supported_band **bands;
  93         struct scan_chan_list_params *params;
  94         struct ieee80211_channel *channel;
  95         struct ieee80211_hw *hw = ar->hw;
  96         struct channel_param *ch;
  97         enum nl80211_band band;
  98         int num_channels = 0;
  99         int params_len;
 100         int i, ret;
 101
 102         bands = hw->wiphy->bands;
 103         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 104                 if (!bands[band])
 105                         continue;
 106
 107                 for (i = 0; i < bands[band]->n_channels; i++) {
 108                         if (bands[band]->channels[i].flags &
 109                             IEEE80211_CHAN_DISABLED)
 110                                 continue;
 111
 112                         num_channels++;
 113                 }
 114         }
 115
 116         if (WARN_ON(!num_channels))
 117                 return -EINVAL;
 118
 119         params_len = sizeof(struct scan_chan_list_params) +
 120                         num_channels * sizeof(struct channel_param);
 121         params = kzalloc(params_len, GFP_KERNEL);
 122
 123         if (!params)
 124                 return -ENOMEM;
 125
 126         params->pdev_id = ar->pdev->pdev_id;
 127         params->nallchans = num_channels;
 128
 129         ch = params->ch_param;
 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                         ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
 165                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
 166                                    i, params->nallchans,
 167                                    ch->mhz, ch->maxpower, ch->maxregpower,
 168                                    ch->antennamax, ch->phy_mode);
 169
 170                         ch++;
 171                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
 172                          * set_agile, reg_class_idx
 173                          */
 174                 }
 175         }
 176
 177         ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
 178         kfree(params);
 179
 180         return ret;
 181 }
 182
 183 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
 184                              struct ieee80211_regdomain *regd_copy)
 185 {
 186         u8 i;
 187
 188         /* The caller should have checked error conditions */
 189         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
 190
 191         for (i = 0; i < regd_orig->n_reg_rules; i++)
 192                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
 193                        sizeof(struct ieee80211_reg_rule));
 194 }
 195
 196 int ath11k_regd_update(struct ath11k *ar, bool init)
 197 {
 198         struct ieee80211_regdomain *regd, *regd_copy = NULL;
 199         int ret, regd_len, pdev_id;
 200         struct ath11k_base *ab;
 201
 202         ab = ar->ab;
 203         pdev_id = ar->pdev_idx;
 204
 205         spin_lock(&ab->base_lock);
 206
 207         if (init) {
 208                 /* Apply the regd received during init through
 209                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
 210                  * receive the regd, initialize with a default world
 211                  * regulatory.
 212                  */
 213                 if (ab->default_regd[pdev_id]) {
 214                         regd = ab->default_regd[pdev_id];
 215                 } else {
 216                         ath11k_warn(ab,
 217                                     "failed to receive default regd during init\n");
 218                         regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
 219                 }
 220         } else {
 221                 regd = ab->new_regd[pdev_id];
 222         }
 223
 224         if (!regd) {
 225                 ret = -EINVAL;
 226                 spin_unlock(&ab->base_lock);
 227                 goto err;
 228         }
 229
 230         regd_len = sizeof(*regd) + (regd->n_reg_rules *
 231                 sizeof(struct ieee80211_reg_rule));
 232
 233         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
 234         if (regd_copy)
 235                 ath11k_copy_regd(regd, regd_copy);
 236
 237         spin_unlock(&ab->base_lock);
 238
 239         if (!regd_copy) {
 240                 ret = -ENOMEM;
 241                 goto err;
 242         }
 243
 244         rtnl_lock();
 245         ret = regulatory_set_wiphy_regd_sync_rtnl(ar->hw->wiphy, regd_copy);
 246         rtnl_unlock();
 247
 248         kfree(regd_copy);
 249
 250         if (ret)
 251                 goto err;
 252
 253         if (ar->state == ATH11K_STATE_ON) {
 254                 ret = ath11k_reg_update_chan_list(ar);
 255                 if (ret)
 256                         goto err;
 257         }
 258
 259         return 0;
 260 err:
 261         ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
 262         return ret;
 263 }
 264
 265 static enum nl80211_dfs_regions
 266 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
 267 {
 268         switch (dfs_region) {
 269         case ATH11K_DFS_REG_FCC:
 270         case ATH11K_DFS_REG_CN:
 271                 return NL80211_DFS_FCC;
 272         case ATH11K_DFS_REG_ETSI:
 273         case ATH11K_DFS_REG_KR:
 274                 return NL80211_DFS_ETSI;
 275         case ATH11K_DFS_REG_MKK:
 276                 return NL80211_DFS_JP;
 277         default:
 278                 return NL80211_DFS_UNSET;
 279         }
 280 }
 281
 282 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
 283 {
 284         u32 flags = 0;
 285
 286         if (reg_flags & REGULATORY_CHAN_NO_IR)
 287                 flags = NL80211_RRF_NO_IR;
 288
 289         if (reg_flags & REGULATORY_CHAN_RADAR)
 290                 flags |= NL80211_RRF_DFS;
 291
 292         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
 293                 flags |= NL80211_RRF_NO_OFDM;
 294
 295         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
 296                 flags |= NL80211_RRF_NO_OUTDOOR;
 297
 298         if (reg_flags & REGULATORY_CHAN_NO_HT40)
 299                 flags |= NL80211_RRF_NO_HT40;
 300
 301         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
 302                 flags |= NL80211_RRF_NO_80MHZ;
 303
 304         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
 305                 flags |= NL80211_RRF_NO_160MHZ;
 306
 307         return flags;
 308 }
 309
 310 static bool
 311 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
 312                          struct ieee80211_reg_rule *rule2)
 313 {
 314         u32 start_freq1, end_freq1;
 315         u32 start_freq2, end_freq2;
 316
 317         start_freq1 = rule1->freq_range.start_freq_khz;
 318         start_freq2 = rule2->freq_range.start_freq_khz;
 319
 320         end_freq1 = rule1->freq_range.end_freq_khz;
 321         end_freq2 = rule2->freq_range.end_freq_khz;
 322
 323         if ((start_freq1 >= start_freq2 &&
 324              start_freq1 < end_freq2) ||
 325             (start_freq2 > start_freq1 &&
 326              start_freq2 < end_freq1))
 327                 return true;
 328
 329         /* TODO: Should we restrict intersection feasibility
 330          *  based on min bandwidth of the intersected region also,
 331          *  say the intersected rule should have a  min bandwidth
 332          * of 20MHz?
 333          */
 334
 335         return false;
 336 }
 337
 338 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
 339                                        struct ieee80211_reg_rule *rule2,
 340                                        struct ieee80211_reg_rule *new_rule)
 341 {
 342         u32 start_freq1, end_freq1;
 343         u32 start_freq2, end_freq2;
 344         u32 freq_diff, max_bw;
 345
 346         start_freq1 = rule1->freq_range.start_freq_khz;
 347         start_freq2 = rule2->freq_range.start_freq_khz;
 348
 349         end_freq1 = rule1->freq_range.end_freq_khz;
 350         end_freq2 = rule2->freq_range.end_freq_khz;
 351
 352         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
 353                                                     start_freq2);
 354         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
 355
 356         freq_diff = new_rule->freq_range.end_freq_khz -
 357                         new_rule->freq_range.start_freq_khz;
 358         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
 359                        rule2->freq_range.max_bandwidth_khz);
 360         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
 361
 362         new_rule->power_rule.max_antenna_gain =
 363                 min_t(u32, rule1->power_rule.max_antenna_gain,
 364                       rule2->power_rule.max_antenna_gain);
 365
 366         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
 367                                               rule2->power_rule.max_eirp);
 368
 369         /* Use the flags of both the rules */
 370         new_rule->flags = rule1->flags | rule2->flags;
 371
 372         /* To be safe, lts use the max cac timeout of both rules */
 373         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
 374                                      rule2->dfs_cac_ms);
 375 }
 376
 377 static struct ieee80211_regdomain *
 378 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
 379                       struct ieee80211_regdomain *curr_regd)
 380 {
 381         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
 382         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
 383         struct ieee80211_regdomain *new_regd = NULL;
 384         u8 i, j, k;
 385
 386         num_old_regd_rules = default_regd->n_reg_rules;
 387         num_curr_regd_rules = curr_regd->n_reg_rules;
 388         num_new_regd_rules = 0;
 389
 390         /* Find the number of intersecting rules to allocate new regd memory */
 391         for (i = 0; i < num_old_regd_rules; i++) {
 392                 old_rule = default_regd->reg_rules + i;
 393                 for (j = 0; j < num_curr_regd_rules; j++) {
 394                         curr_rule = curr_regd->reg_rules + j;
 395
 396                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 397                                 num_new_regd_rules++;
 398                 }
 399         }
 400
 401         if (!num_new_regd_rules)
 402                 return NULL;
 403
 404         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
 405                         sizeof(struct ieee80211_reg_rule)),
 406                         GFP_ATOMIC);
 407
 408         if (!new_regd)
 409                 return NULL;
 410
 411         /* We set the new country and dfs region directly and only trim
 412          * the freq, power, antenna gain by intersecting with the
 413          * default regdomain. Also MAX of the dfs cac timeout is selected.
 414          */
 415         new_regd->n_reg_rules = num_new_regd_rules;
 416         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
 417         new_regd->dfs_region = curr_regd->dfs_region;
 418         new_rule = new_regd->reg_rules;
 419
 420         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
 421                 old_rule = default_regd->reg_rules + i;
 422                 for (j = 0; j < num_curr_regd_rules; j++) {
 423                         curr_rule = curr_regd->reg_rules + j;
 424
 425                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 426                                 ath11k_reg_intersect_rules(old_rule, curr_rule,
 427                                                            (new_rule + k++));
 428                 }
 429         }
 430         return new_regd;
 431 }
 432
 433 static const char *
 434 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
 435 {
 436         switch (dfs_region) {
 437         case NL80211_DFS_FCC:
 438                 return "FCC";
 439         case NL80211_DFS_ETSI:
 440                 return "ETSI";
 441         case NL80211_DFS_JP:
 442                 return "JP";
 443         default:
 444                 return "UNSET";
 445         }
 446 }
 447
 448 static u16
 449 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
 450 {
 451         u16 bw;
 452
 453         bw = end_freq - start_freq;
 454         bw = min_t(u16, bw, max_bw);
 455
 456         if (bw >= 80 && bw < 160)
 457                 bw = 80;
 458         else if (bw >= 40 && bw < 80)
 459                 bw = 40;
 460         else if (bw < 40)
 461                 bw = 20;
 462
 463         return bw;
 464 }
 465
 466 static void
 467 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
 468                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
 469                        u32 reg_flags)
 470 {
 471         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
 472         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
 473         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
 474         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
 475         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
 476         reg_rule->flags = reg_flags;
 477 }
 478
 479 static void
 480 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
 481                                      struct ieee80211_regdomain *regd,
 482                                      struct cur_reg_rule *reg_rule,
 483                                      u8 *rule_idx, u32 flags, u16 max_bw)
 484 {
 485         u32 end_freq;
 486         u16 bw;
 487         u8 i;
 488
 489         i = *rule_idx;
 490
 491         bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
 492                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
 493
 494         ath11k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
 495                                ETSI_WEATHER_RADAR_BAND_LOW, bw,
 496                                reg_rule->ant_gain, reg_rule->reg_power,
 497                                flags);
 498
 499         ath11k_dbg(ab, ATH11K_DBG_REG,
 500                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 501                    i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
 502                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 503                    regd->reg_rules[i].dfs_cac_ms,
 504                    flags);
 505
 506         if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
 507                 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
 508         else
 509                 end_freq = reg_rule->end_freq;
 510
 511         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 512                                   max_bw);
 513
 514         i++;
 515
 516         ath11k_reg_update_rule(regd->reg_rules + i,
 517                                ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
 518                                reg_rule->ant_gain, reg_rule->reg_power,
 519                                flags);
 520
 521         regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
 522
 523         ath11k_dbg(ab, ATH11K_DBG_REG,
 524                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 525                    i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 526                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 527                    regd->reg_rules[i].dfs_cac_ms,
 528                    flags);
 529
 530         if (end_freq == reg_rule->end_freq) {
 531                 regd->n_reg_rules--;
 532                 *rule_idx = i;
 533                 return;
 534         }
 535
 536         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
 537                                   reg_rule->end_freq, max_bw);
 538
 539         i++;
 540
 541         ath11k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
 542                                reg_rule->end_freq, bw,
 543                                reg_rule->ant_gain, reg_rule->reg_power,
 544                                flags);
 545
 546         ath11k_dbg(ab, ATH11K_DBG_REG,
 547                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 548                    i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
 549                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 550                    regd->reg_rules[i].dfs_cac_ms,
 551                    flags);
 552
 553         *rule_idx = i;
 554 }
 555
 556 struct ieee80211_regdomain *
 557 ath11k_reg_build_regd(struct ath11k_base *ab,
 558                       struct cur_regulatory_info *reg_info, bool intersect)
 559 {
 560         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
 561         struct cur_reg_rule *reg_rule;
 562         u8 i = 0, j = 0;
 563         u8 num_rules;
 564         u16 max_bw;
 565         u32 flags;
 566         char alpha2[3];
 567
 568         num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
 569
 570         if (!num_rules)
 571                 goto ret;
 572
 573         /* Add max additional rules to accommodate weather radar band */
 574         if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
 575                 num_rules += 2;
 576
 577         tmp_regd =  kzalloc(sizeof(*tmp_regd) +
 578                         (num_rules * sizeof(struct ieee80211_reg_rule)),
 579                         GFP_ATOMIC);
 580         if (!tmp_regd)
 581                 goto ret;
 582
 583         tmp_regd->n_reg_rules = num_rules;
 584         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 585         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 586         alpha2[2] = '\0';
 587         tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
 588
 589         ath11k_dbg(ab, ATH11K_DBG_REG,
 590                    "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
 591                    alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
 592                    reg_info->dfs_region, num_rules);
 593         /* Update reg_rules[] below. Firmware is expected to
 594          * send these rules in order(2G rules first and then 5G)
 595          */
 596         for (; i < tmp_regd->n_reg_rules; i++) {
 597                 if (reg_info->num_2g_reg_rules &&
 598                     (i < reg_info->num_2g_reg_rules)) {
 599                         reg_rule = reg_info->reg_rules_2g_ptr + i;
 600                         max_bw = min_t(u16, reg_rule->max_bw,
 601                                        reg_info->max_bw_2g);
 602                         flags = 0;
 603                 } else if (reg_info->num_5g_reg_rules &&
 604                            (j < reg_info->num_5g_reg_rules)) {
 605                         reg_rule = reg_info->reg_rules_5g_ptr + j++;
 606                         max_bw = min_t(u16, reg_rule->max_bw,
 607                                        reg_info->max_bw_5g);
 608
 609                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
 610                          * BW Auto correction, we can enable this by default
 611                          * for all 5G rules here. The regulatory core performs
 612                          * BW correction if required and applies flags as
 613                          * per other BW rule flags we pass from here
 614                          */
 615                         flags = NL80211_RRF_AUTO_BW;
 616                 } else {
 617                         break;
 618                 }
 619
 620                 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
 621
 622                 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
 623                                        reg_rule->start_freq,
 624                                        reg_rule->end_freq, max_bw,
 625                                        reg_rule->ant_gain, reg_rule->reg_power,
 626                                        flags);
 627
 628                 /* Update dfs cac timeout if the dfs domain is ETSI and the
 629                  * new rule covers weather radar band.
 630                  * Default value of '0' corresponds to 60s timeout, so no
 631                  * need to update that for other rules.
 632                  */
 633                 if (flags & NL80211_RRF_DFS &&
 634                     reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
 635                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
 636                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
 637                         ath11k_reg_update_weather_radar_band(ab, tmp_regd,
 638                                                              reg_rule, &i,
 639                                                              flags, max_bw);
 640                         continue;
 641                 }
 642
 643                 ath11k_dbg(ab, ATH11K_DBG_REG,
 644                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 645                            i + 1, reg_rule->start_freq, reg_rule->end_freq,
 646                            max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 647                            tmp_regd->reg_rules[i].dfs_cac_ms,
 648                            flags);
 649         }
 650
 651         if (intersect) {
 652                 default_regd = ab->default_regd[reg_info->phy_id];
 653
 654                 /* Get a new regd by intersecting the received regd with
 655                  * our default regd.
 656                  */
 657                 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
 658                 kfree(tmp_regd);
 659                 if (!new_regd) {
 660                         ath11k_warn(ab, "Unable to create intersected regdomain\n");
 661                         goto ret;
 662                 }
 663         } else {
 664                 new_regd = tmp_regd;
 665         }
 666
 667 ret:
 668         return new_regd;
 669 }
 670
 671 void ath11k_regd_update_work(struct work_struct *work)
 672 {
 673         struct ath11k *ar = container_of(work, struct ath11k,
 674                                          regd_update_work);
 675         int ret;
 676
 677         ret = ath11k_regd_update(ar, false);
 678         if (ret) {
 679                 /* Firmware has already moved to the new regd. We need
 680                  * to maintain channel consistency across FW, Host driver
 681                  * and userspace. Hence as a fallback mechanism we can set
 682                  * the prev or default country code to the firmware.
 683                  */
 684                 /* TODO: Implement Fallback Mechanism */
 685         }
 686 }
 687
 688 void ath11k_reg_init(struct ath11k *ar)
 689 {
 690         ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
 691         ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
 692 }
 693
 694 void ath11k_reg_free(struct ath11k_base *ab)
 695 {
 696         int i;
 697
 698         for (i = 0; i < MAX_RADIOS; i++) {
 699                 kfree(ab->default_regd[i]);
 700                 kfree(ab->new_regd[i]);
 701         }
 702 }