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         init_country_param.cc_info.alpha2[2] = 0;
  84
  85         ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
  86         if (ret)
  87                 ath11k_warn(ar->ab,
  88                             "INIT Country code set to fw failed : %d\n", ret);
  89 }
  90
  91 int ath11k_reg_update_chan_list(struct ath11k *ar)
  92 {
  93         struct ieee80211_supported_band **bands;
  94         struct scan_chan_list_params *params;
  95         struct ieee80211_channel *channel;
  96         struct ieee80211_hw *hw = ar->hw;
  97         struct channel_param *ch;
  98         enum nl80211_band band;
  99         int num_channels = 0;
 100         int params_len;
 101         int i, ret;
 102
 103         bands = hw->wiphy->bands;
 104         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 105                 if (!bands[band])
 106                         continue;
 107
 108                 for (i = 0; i < bands[band]->n_channels; i++) {
 109                         if (bands[band]->channels[i].flags &
 110                             IEEE80211_CHAN_DISABLED)
 111                                 continue;
 112
 113                         num_channels++;
 114                 }
 115         }
 116
 117         if (WARN_ON(!num_channels))
 118                 return -EINVAL;
 119
 120         params_len = sizeof(struct scan_chan_list_params) +
 121                         num_channels * sizeof(struct channel_param);
 122         params = kzalloc(params_len, GFP_KERNEL);
 123
 124         if (!params)
 125                 return -ENOMEM;
 126
 127         params->pdev_id = ar->pdev->pdev_id;
 128         params->nallchans = num_channels;
 129
 130         ch = params->ch_param;
 131
 132         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 133                 if (!bands[band])
 134                         continue;
 135
 136                 for (i = 0; i < bands[band]->n_channels; i++) {
 137                         channel = &bands[band]->channels[i];
 138
 139                         if (channel->flags & IEEE80211_CHAN_DISABLED)
 140                                 continue;
 141
 142                         /* TODO: Set to true/false based on some condition? */
 143                         ch->allow_ht = true;
 144                         ch->allow_vht = true;
 145                         ch->allow_he = true;
 146
 147                         ch->dfs_set =
 148                                 !!(channel->flags & IEEE80211_CHAN_RADAR);
 149                         ch->is_chan_passive = !!(channel->flags &
 150                                                 IEEE80211_CHAN_NO_IR);
 151                         ch->is_chan_passive |= ch->dfs_set;
 152                         ch->mhz = channel->center_freq;
 153                         ch->cfreq1 = channel->center_freq;
 154                         ch->minpower = 0;
 155                         ch->maxpower = channel->max_power * 2;
 156                         ch->maxregpower = channel->max_reg_power * 2;
 157                         ch->antennamax = channel->max_antenna_gain * 2;
 158
 159                         /* TODO: Use appropriate phymodes */
 160                         if (channel->band == NL80211_BAND_2GHZ)
 161                                 ch->phy_mode = MODE_11G;
 162                         else
 163                                 ch->phy_mode = MODE_11A;
 164
 165                         if (channel->band == NL80211_BAND_6GHZ &&
 166                             cfg80211_channel_is_psc(channel))
 167                                 ch->psc_channel = true;
 168
 169                         ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
 170                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
 171                                    i, params->nallchans,
 172                                    ch->mhz, ch->maxpower, ch->maxregpower,
 173                                    ch->antennamax, ch->phy_mode);
 174
 175                         ch++;
 176                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
 177                          * set_agile, reg_class_idx
 178                          */
 179                 }
 180         }
 181
 182         ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
 183         kfree(params);
 184
 185         return ret;
 186 }
 187
 188 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
 189                              struct ieee80211_regdomain *regd_copy)
 190 {
 191         u8 i;
 192
 193         /* The caller should have checked error conditions */
 194         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
 195
 196         for (i = 0; i < regd_orig->n_reg_rules; i++)
 197                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
 198                        sizeof(struct ieee80211_reg_rule));
 199 }
 200
 201 int ath11k_regd_update(struct ath11k *ar, bool init)
 202 {
 203         struct ieee80211_regdomain *regd, *regd_copy = NULL;
 204         int ret, regd_len, pdev_id;
 205         struct ath11k_base *ab;
 206
 207         ab = ar->ab;
 208         pdev_id = ar->pdev_idx;
 209
 210         spin_lock_bh(&ab->base_lock);
 211
 212         if (init) {
 213                 /* Apply the regd received during init through
 214                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
 215                  * receive the regd, initialize with a default world
 216                  * regulatory.
 217                  */
 218                 if (ab->default_regd[pdev_id]) {
 219                         regd = ab->default_regd[pdev_id];
 220                 } else {
 221                         ath11k_warn(ab,
 222                                     "failed to receive default regd during init\n");
 223                         regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
 224                 }
 225         } else {
 226                 regd = ab->new_regd[pdev_id];
 227         }
 228
 229         if (!regd) {
 230                 ret = -EINVAL;
 231                 spin_unlock_bh(&ab->base_lock);
 232                 goto err;
 233         }
 234
 235         regd_len = sizeof(*regd) + (regd->n_reg_rules *
 236                 sizeof(struct ieee80211_reg_rule));
 237
 238         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
 239         if (regd_copy)
 240                 ath11k_copy_regd(regd, regd_copy);
 241
 242         spin_unlock_bh(&ab->base_lock);
 243
 244         if (!regd_copy) {
 245                 ret = -ENOMEM;
 246                 goto err;
 247         }
 248
 249         rtnl_lock();
 250         ret = regulatory_set_wiphy_regd_sync_rtnl(ar->hw->wiphy, regd_copy);
 251         rtnl_unlock();
 252
 253         kfree(regd_copy);
 254
 255         if (ret)
 256                 goto err;
 257
 258         if (ar->state == ATH11K_STATE_ON) {
 259                 ret = ath11k_reg_update_chan_list(ar);
 260                 if (ret)
 261                         goto err;
 262         }
 263
 264         return 0;
 265 err:
 266         ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
 267         return ret;
 268 }
 269
 270 static enum nl80211_dfs_regions
 271 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
 272 {
 273         switch (dfs_region) {
 274         case ATH11K_DFS_REG_FCC:
 275         case ATH11K_DFS_REG_CN:
 276                 return NL80211_DFS_FCC;
 277         case ATH11K_DFS_REG_ETSI:
 278         case ATH11K_DFS_REG_KR:
 279                 return NL80211_DFS_ETSI;
 280         case ATH11K_DFS_REG_MKK:
 281         case ATH11K_DFS_REG_MKK_N:
 282                 return NL80211_DFS_JP;
 283         default:
 284                 return NL80211_DFS_UNSET;
 285         }
 286 }
 287
 288 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
 289 {
 290         u32 flags = 0;
 291
 292         if (reg_flags & REGULATORY_CHAN_NO_IR)
 293                 flags = NL80211_RRF_NO_IR;
 294
 295         if (reg_flags & REGULATORY_CHAN_RADAR)
 296                 flags |= NL80211_RRF_DFS;
 297
 298         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
 299                 flags |= NL80211_RRF_NO_OFDM;
 300
 301         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
 302                 flags |= NL80211_RRF_NO_OUTDOOR;
 303
 304         if (reg_flags & REGULATORY_CHAN_NO_HT40)
 305                 flags |= NL80211_RRF_NO_HT40;
 306
 307         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
 308                 flags |= NL80211_RRF_NO_80MHZ;
 309
 310         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
 311                 flags |= NL80211_RRF_NO_160MHZ;
 312
 313         return flags;
 314 }
 315
 316 static bool
 317 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
 318                          struct ieee80211_reg_rule *rule2)
 319 {
 320         u32 start_freq1, end_freq1;
 321         u32 start_freq2, end_freq2;
 322
 323         start_freq1 = rule1->freq_range.start_freq_khz;
 324         start_freq2 = rule2->freq_range.start_freq_khz;
 325
 326         end_freq1 = rule1->freq_range.end_freq_khz;
 327         end_freq2 = rule2->freq_range.end_freq_khz;
 328
 329         if ((start_freq1 >= start_freq2 &&
 330              start_freq1 < end_freq2) ||
 331             (start_freq2 > start_freq1 &&
 332              start_freq2 < end_freq1))
 333                 return true;
 334
 335         /* TODO: Should we restrict intersection feasibility
 336          *  based on min bandwidth of the intersected region also,
 337          *  say the intersected rule should have a  min bandwidth
 338          * of 20MHz?
 339          */
 340
 341         return false;
 342 }
 343
 344 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
 345                                        struct ieee80211_reg_rule *rule2,
 346                                        struct ieee80211_reg_rule *new_rule)
 347 {
 348         u32 start_freq1, end_freq1;
 349         u32 start_freq2, end_freq2;
 350         u32 freq_diff, max_bw;
 351
 352         start_freq1 = rule1->freq_range.start_freq_khz;
 353         start_freq2 = rule2->freq_range.start_freq_khz;
 354
 355         end_freq1 = rule1->freq_range.end_freq_khz;
 356         end_freq2 = rule2->freq_range.end_freq_khz;
 357
 358         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
 359                                                     start_freq2);
 360         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
 361
 362         freq_diff = new_rule->freq_range.end_freq_khz -
 363                         new_rule->freq_range.start_freq_khz;
 364         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
 365                        rule2->freq_range.max_bandwidth_khz);
 366         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
 367
 368         new_rule->power_rule.max_antenna_gain =
 369                 min_t(u32, rule1->power_rule.max_antenna_gain,
 370                       rule2->power_rule.max_antenna_gain);
 371
 372         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
 373                                               rule2->power_rule.max_eirp);
 374
 375         /* Use the flags of both the rules */
 376         new_rule->flags = rule1->flags | rule2->flags;
 377
 378         /* To be safe, lts use the max cac timeout of both rules */
 379         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
 380                                      rule2->dfs_cac_ms);
 381 }
 382
 383 static struct ieee80211_regdomain *
 384 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
 385                       struct ieee80211_regdomain *curr_regd)
 386 {
 387         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
 388         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
 389         struct ieee80211_regdomain *new_regd = NULL;
 390         u8 i, j, k;
 391
 392         num_old_regd_rules = default_regd->n_reg_rules;
 393         num_curr_regd_rules = curr_regd->n_reg_rules;
 394         num_new_regd_rules = 0;
 395
 396         /* Find the number of intersecting rules to allocate new regd memory */
 397         for (i = 0; i < num_old_regd_rules; i++) {
 398                 old_rule = default_regd->reg_rules + i;
 399                 for (j = 0; j < num_curr_regd_rules; j++) {
 400                         curr_rule = curr_regd->reg_rules + j;
 401
 402                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 403                                 num_new_regd_rules++;
 404                 }
 405         }
 406
 407         if (!num_new_regd_rules)
 408                 return NULL;
 409
 410         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
 411                         sizeof(struct ieee80211_reg_rule)),
 412                         GFP_ATOMIC);
 413
 414         if (!new_regd)
 415                 return NULL;
 416
 417         /* We set the new country and dfs region directly and only trim
 418          * the freq, power, antenna gain by intersecting with the
 419          * default regdomain. Also MAX of the dfs cac timeout is selected.
 420          */
 421         new_regd->n_reg_rules = num_new_regd_rules;
 422         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
 423         new_regd->dfs_region = curr_regd->dfs_region;
 424         new_rule = new_regd->reg_rules;
 425
 426         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
 427                 old_rule = default_regd->reg_rules + i;
 428                 for (j = 0; j < num_curr_regd_rules; j++) {
 429                         curr_rule = curr_regd->reg_rules + j;
 430
 431                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 432                                 ath11k_reg_intersect_rules(old_rule, curr_rule,
 433                                                            (new_rule + k++));
 434                 }
 435         }
 436         return new_regd;
 437 }
 438
 439 static const char *
 440 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
 441 {
 442         switch (dfs_region) {
 443         case NL80211_DFS_FCC:
 444                 return "FCC";
 445         case NL80211_DFS_ETSI:
 446                 return "ETSI";
 447         case NL80211_DFS_JP:
 448                 return "JP";
 449         default:
 450                 return "UNSET";
 451         }
 452 }
 453
 454 static u16
 455 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
 456 {
 457         u16 bw;
 458
 459         bw = end_freq - start_freq;
 460         bw = min_t(u16, bw, max_bw);
 461
 462         if (bw >= 80 && bw < 160)
 463                 bw = 80;
 464         else if (bw >= 40 && bw < 80)
 465                 bw = 40;
 466         else if (bw < 40)
 467                 bw = 20;
 468
 469         return bw;
 470 }
 471
 472 static void
 473 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
 474                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
 475                        u32 reg_flags)
 476 {
 477         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
 478         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
 479         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
 480         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
 481         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
 482         reg_rule->flags = reg_flags;
 483 }
 484
 485 static void
 486 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
 487                                      struct ieee80211_regdomain *regd,
 488                                      struct cur_reg_rule *reg_rule,
 489                                      u8 *rule_idx, u32 flags, u16 max_bw)
 490 {
 491         u32 end_freq;
 492         u16 bw;
 493         u8 i;
 494
 495         i = *rule_idx;
 496
 497         bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
 498                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
 499
 500         ath11k_reg_update_rule(regd->reg_rules + i, reg_rule->start_freq,
 501                                ETSI_WEATHER_RADAR_BAND_LOW, bw,
 502                                reg_rule->ant_gain, reg_rule->reg_power,
 503                                flags);
 504
 505         ath11k_dbg(ab, ATH11K_DBG_REG,
 506                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 507                    i + 1, reg_rule->start_freq, ETSI_WEATHER_RADAR_BAND_LOW,
 508                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 509                    regd->reg_rules[i].dfs_cac_ms,
 510                    flags);
 511
 512         if (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_HIGH)
 513                 end_freq = ETSI_WEATHER_RADAR_BAND_HIGH;
 514         else
 515                 end_freq = reg_rule->end_freq;
 516
 517         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 518                                   max_bw);
 519
 520         i++;
 521
 522         ath11k_reg_update_rule(regd->reg_rules + i,
 523                                ETSI_WEATHER_RADAR_BAND_LOW, end_freq, bw,
 524                                reg_rule->ant_gain, reg_rule->reg_power,
 525                                flags);
 526
 527         regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
 528
 529         ath11k_dbg(ab, ATH11K_DBG_REG,
 530                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 531                    i + 1, ETSI_WEATHER_RADAR_BAND_LOW, end_freq,
 532                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 533                    regd->reg_rules[i].dfs_cac_ms,
 534                    flags);
 535
 536         if (end_freq == reg_rule->end_freq) {
 537                 regd->n_reg_rules--;
 538                 *rule_idx = i;
 539                 return;
 540         }
 541
 542         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
 543                                   reg_rule->end_freq, max_bw);
 544
 545         i++;
 546
 547         ath11k_reg_update_rule(regd->reg_rules + i, ETSI_WEATHER_RADAR_BAND_HIGH,
 548                                reg_rule->end_freq, bw,
 549                                reg_rule->ant_gain, reg_rule->reg_power,
 550                                flags);
 551
 552         ath11k_dbg(ab, ATH11K_DBG_REG,
 553                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 554                    i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, reg_rule->end_freq,
 555                    bw, reg_rule->ant_gain, reg_rule->reg_power,
 556                    regd->reg_rules[i].dfs_cac_ms,
 557                    flags);
 558
 559         *rule_idx = i;
 560 }
 561
 562 struct ieee80211_regdomain *
 563 ath11k_reg_build_regd(struct ath11k_base *ab,
 564                       struct cur_regulatory_info *reg_info, bool intersect)
 565 {
 566         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
 567         struct cur_reg_rule *reg_rule;
 568         u8 i = 0, j = 0;
 569         u8 num_rules;
 570         u16 max_bw;
 571         u32 flags;
 572         char alpha2[3];
 573
 574         num_rules = reg_info->num_5g_reg_rules + reg_info->num_2g_reg_rules;
 575
 576         if (!num_rules)
 577                 goto ret;
 578
 579         /* Add max additional rules to accommodate weather radar band */
 580         if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
 581                 num_rules += 2;
 582
 583         tmp_regd =  kzalloc(sizeof(*tmp_regd) +
 584                         (num_rules * sizeof(struct ieee80211_reg_rule)),
 585                         GFP_ATOMIC);
 586         if (!tmp_regd)
 587                 goto ret;
 588
 589         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 590         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 591         alpha2[2] = '\0';
 592         tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
 593
 594         ath11k_dbg(ab, ATH11K_DBG_REG,
 595                    "\r\nCountry %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
 596                    alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
 597                    reg_info->dfs_region, num_rules);
 598         /* Update reg_rules[] below. Firmware is expected to
 599          * send these rules in order(2G rules first and then 5G)
 600          */
 601         for (; i < num_rules; i++) {
 602                 if (reg_info->num_2g_reg_rules &&
 603                     (i < reg_info->num_2g_reg_rules)) {
 604                         reg_rule = reg_info->reg_rules_2g_ptr + i;
 605                         max_bw = min_t(u16, reg_rule->max_bw,
 606                                        reg_info->max_bw_2g);
 607                         flags = 0;
 608                 } else if (reg_info->num_5g_reg_rules &&
 609                            (j < reg_info->num_5g_reg_rules)) {
 610                         reg_rule = reg_info->reg_rules_5g_ptr + j++;
 611                         max_bw = min_t(u16, reg_rule->max_bw,
 612                                        reg_info->max_bw_5g);
 613
 614                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
 615                          * BW Auto correction, we can enable this by default
 616                          * for all 5G rules here. The regulatory core performs
 617                          * BW correction if required and applies flags as
 618                          * per other BW rule flags we pass from here
 619                          */
 620                         flags = NL80211_RRF_AUTO_BW;
 621                 } else {
 622                         break;
 623                 }
 624
 625                 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
 626
 627                 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
 628                                        reg_rule->start_freq,
 629                                        reg_rule->end_freq, max_bw,
 630                                        reg_rule->ant_gain, reg_rule->reg_power,
 631                                        flags);
 632
 633                 /* Update dfs cac timeout if the dfs domain is ETSI and the
 634                  * new rule covers weather radar band.
 635                  * Default value of '0' corresponds to 60s timeout, so no
 636                  * need to update that for other rules.
 637                  */
 638                 if (flags & NL80211_RRF_DFS &&
 639                     reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
 640                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
 641                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
 642                         ath11k_reg_update_weather_radar_band(ab, tmp_regd,
 643                                                              reg_rule, &i,
 644                                                              flags, max_bw);
 645                         continue;
 646                 }
 647
 648                 ath11k_dbg(ab, ATH11K_DBG_REG,
 649                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 650                            i + 1, reg_rule->start_freq, reg_rule->end_freq,
 651                            max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 652                            tmp_regd->reg_rules[i].dfs_cac_ms,
 653                            flags);
 654         }
 655
 656         tmp_regd->n_reg_rules = i;
 657
 658         if (intersect) {
 659                 default_regd = ab->default_regd[reg_info->phy_id];
 660
 661                 /* Get a new regd by intersecting the received regd with
 662                  * our default regd.
 663                  */
 664                 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
 665                 kfree(tmp_regd);
 666                 if (!new_regd) {
 667                         ath11k_warn(ab, "Unable to create intersected regdomain\n");
 668                         goto ret;
 669                 }
 670         } else {
 671                 new_regd = tmp_regd;
 672         }
 673
 674 ret:
 675         return new_regd;
 676 }
 677
 678 void ath11k_regd_update_work(struct work_struct *work)
 679 {
 680         struct ath11k *ar = container_of(work, struct ath11k,
 681                                          regd_update_work);
 682         int ret;
 683
 684         ret = ath11k_regd_update(ar, false);
 685         if (ret) {
 686                 /* Firmware has already moved to the new regd. We need
 687                  * to maintain channel consistency across FW, Host driver
 688                  * and userspace. Hence as a fallback mechanism we can set
 689                  * the prev or default country code to the firmware.
 690                  */
 691                 /* TODO: Implement Fallback Mechanism */
 692         }
 693 }
 694
 695 void ath11k_reg_init(struct ath11k *ar)
 696 {
 697         ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
 698         ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
 699 }
 700
 701 void ath11k_reg_free(struct ath11k_base *ab)
 702 {
 703         int i;
 704
 705         for (i = 0; i < ab->hw_params.max_radios; i++) {
 706                 kfree(ab->default_regd[i]);
 707                 kfree(ab->new_regd[i]);
 708         }
 709 }