drivers/net/wireless/ath/ath11k/reg.c

   1 // SPDX-License-Identifier: BSD-3-Clause-Clear
   2 /*
   3  * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
   4  * Copyright (c) 2021-2024 Qualcomm Innovation Center, Inc. All rights reserved.
   5  */
   6 #include <linux/rtnetlink.h>
   7
   8 #include "core.h"
   9 #include "debug.h"
  10
  11 /* World regdom to be used in case default regd from fw is unavailable */
  12 #define ATH11K_2GHZ_CH01_11      REG_RULE(2412 - 10, 2462 + 10, 40, 0, 20, 0)
  13 #define ATH11K_5GHZ_5150_5350    REG_RULE(5150 - 10, 5350 + 10, 80, 0, 30,\
  14                                           NL80211_RRF_NO_IR)
  15 #define ATH11K_5GHZ_5725_5850    REG_RULE(5725 - 10, 5850 + 10, 80, 0, 30,\
  16                                           NL80211_RRF_NO_IR)
  17
  18 #define ETSI_WEATHER_RADAR_BAND_LOW             5590
  19 #define ETSI_WEATHER_RADAR_BAND_HIGH            5650
  20 #define ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT     600000
  21
  22 static const struct ieee80211_regdomain ath11k_world_regd = {
  23         .n_reg_rules = 3,
  24         .alpha2 =  "00",
  25         .reg_rules = {
  26                 ATH11K_2GHZ_CH01_11,
  27                 ATH11K_5GHZ_5150_5350,
  28                 ATH11K_5GHZ_5725_5850,
  29         }
  30 };
  31
  32 static bool ath11k_regdom_changes(struct ath11k *ar, char *alpha2)
  33 {
  34         const struct ieee80211_regdomain *regd;
  35
  36         regd = rcu_dereference_rtnl(ar->hw->wiphy->regd);
  37         /* This can happen during wiphy registration where the previous
  38          * user request is received before we update the regd received
  39          * from firmware.
  40          */
  41         if (!regd)
  42                 return true;
  43
  44         return memcmp(regd->alpha2, alpha2, 2) != 0;
  45 }
  46
  47 static void
  48 ath11k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
  49 {
  50         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
  51         struct wmi_init_country_params init_country_param;
  52         struct ath11k *ar = hw->priv;
  53         int ret;
  54
  55         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
  56                    "Regulatory Notification received for %s\n", wiphy_name(wiphy));
  57
  58         /* Currently supporting only General User Hints. Cell base user
  59          * hints to be handled later.
  60          * Hints from other sources like Core, Beacons are not expected for
  61          * self managed wiphy's
  62          */
  63         if (!(request->initiator == NL80211_REGDOM_SET_BY_USER &&
  64               request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) {
  65                 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n");
  66                 return;
  67         }
  68
  69         if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) {
  70                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
  71                            "Country Setting is not allowed\n");
  72                 return;
  73         }
  74
  75         if (!ath11k_regdom_changes(ar, request->alpha2)) {
  76                 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n");
  77                 return;
  78         }
  79
  80         /* Set the country code to the firmware and will receive
  81          * the WMI_REG_CHAN_LIST_CC EVENT for updating the
  82          * reg info
  83          */
  84         if (ar->ab->hw_params.current_cc_support) {
  85                 memcpy(&ar->alpha2, request->alpha2, 2);
  86                 ret = ath11k_reg_set_cc(ar);
  87                 if (ret)
  88                         ath11k_warn(ar->ab,
  89                                     "failed set current country code: %d\n", ret);
  90         } else {
  91                 init_country_param.flags = ALPHA_IS_SET;
  92                 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2);
  93                 init_country_param.cc_info.alpha2[2] = 0;
  94
  95                 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param);
  96                 if (ret)
  97                         ath11k_warn(ar->ab,
  98                                     "INIT Country code set to fw failed : %d\n", ret);
  99         }
 100
 101         ath11k_mac_11d_scan_stop(ar);
 102         ar->regdom_set_by_user = true;
 103 }
 104
 105 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait)
 106 {
 107         struct ieee80211_supported_band **bands;
 108         struct scan_chan_list_params *params;
 109         struct ieee80211_channel *channel;
 110         struct ieee80211_hw *hw = ar->hw;
 111         struct channel_param *ch;
 112         enum nl80211_band band;
 113         int num_channels = 0;
 114         int i, ret, left;
 115
 116         if (wait && ar->state_11d != ATH11K_11D_IDLE) {
 117                 left = wait_for_completion_timeout(&ar->completed_11d_scan,
 118                                                    ATH11K_SCAN_TIMEOUT_HZ);
 119                 if (!left) {
 120                         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
 121                                    "failed to receive 11d scan complete: timed out\n");
 122                         ar->state_11d = ATH11K_11D_IDLE;
 123                 }
 124                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
 125                            "11d scan wait left time %d\n", left);
 126         }
 127
 128         if (wait &&
 129             (ar->scan.state == ATH11K_SCAN_STARTING ||
 130             ar->scan.state == ATH11K_SCAN_RUNNING)) {
 131                 left = wait_for_completion_timeout(&ar->scan.completed,
 132                                                    ATH11K_SCAN_TIMEOUT_HZ);
 133                 if (!left)
 134                         ath11k_dbg(ar->ab, ATH11K_DBG_REG,
 135                                    "failed to receive hw scan complete: timed out\n");
 136
 137                 ath11k_dbg(ar->ab, ATH11K_DBG_REG,
 138                            "hw scan wait left time %d\n", left);
 139         }
 140
 141         if (ar->state == ATH11K_STATE_RESTARTING)
 142                 return 0;
 143
 144         bands = hw->wiphy->bands;
 145         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 146                 if (!bands[band])
 147                         continue;
 148
 149                 for (i = 0; i < bands[band]->n_channels; i++) {
 150                         if (bands[band]->channels[i].flags &
 151                             IEEE80211_CHAN_DISABLED)
 152                                 continue;
 153
 154                         num_channels++;
 155                 }
 156         }
 157
 158         if (WARN_ON(!num_channels))
 159                 return -EINVAL;
 160
 161         params = kzalloc(struct_size(params, ch_param, num_channels),
 162                          GFP_KERNEL);
 163         if (!params)
 164                 return -ENOMEM;
 165
 166         params->pdev_id = ar->pdev->pdev_id;
 167         params->nallchans = num_channels;
 168
 169         ch = params->ch_param;
 170
 171         for (band = 0; band < NUM_NL80211_BANDS; band++) {
 172                 if (!bands[band])
 173                         continue;
 174
 175                 for (i = 0; i < bands[band]->n_channels; i++) {
 176                         channel = &bands[band]->channels[i];
 177
 178                         if (channel->flags & IEEE80211_CHAN_DISABLED)
 179                                 continue;
 180
 181                         /* TODO: Set to true/false based on some condition? */
 182                         ch->allow_ht = true;
 183                         ch->allow_vht = true;
 184                         ch->allow_he = true;
 185
 186                         ch->dfs_set =
 187                                 !!(channel->flags & IEEE80211_CHAN_RADAR);
 188                         ch->is_chan_passive = !!(channel->flags &
 189                                                 IEEE80211_CHAN_NO_IR);
 190                         ch->is_chan_passive |= ch->dfs_set;
 191                         ch->mhz = channel->center_freq;
 192                         ch->cfreq1 = channel->center_freq;
 193                         ch->minpower = 0;
 194                         ch->maxpower = channel->max_power * 2;
 195                         ch->maxregpower = channel->max_reg_power * 2;
 196                         ch->antennamax = channel->max_antenna_gain * 2;
 197
 198                         /* TODO: Use appropriate phymodes */
 199                         if (channel->band == NL80211_BAND_2GHZ)
 200                                 ch->phy_mode = MODE_11G;
 201                         else
 202                                 ch->phy_mode = MODE_11A;
 203
 204                         if (channel->band == NL80211_BAND_6GHZ &&
 205                             cfg80211_channel_is_psc(channel))
 206                                 ch->psc_channel = true;
 207
 208                         ath11k_dbg(ar->ab, ATH11K_DBG_WMI,
 209                                    "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n",
 210                                    i, params->nallchans,
 211                                    ch->mhz, ch->maxpower, ch->maxregpower,
 212                                    ch->antennamax, ch->phy_mode);
 213
 214                         ch++;
 215                         /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2
 216                          * set_agile, reg_class_idx
 217                          */
 218                 }
 219         }
 220
 221         ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params);
 222         kfree(params);
 223
 224         return ret;
 225 }
 226
 227 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig,
 228                              struct ieee80211_regdomain *regd_copy)
 229 {
 230         u8 i;
 231
 232         /* The caller should have checked error conditions */
 233         memcpy(regd_copy, regd_orig, sizeof(*regd_orig));
 234
 235         for (i = 0; i < regd_orig->n_reg_rules; i++)
 236                 memcpy(&regd_copy->reg_rules[i], &regd_orig->reg_rules[i],
 237                        sizeof(struct ieee80211_reg_rule));
 238 }
 239
 240 int ath11k_regd_update(struct ath11k *ar)
 241 {
 242         struct ieee80211_regdomain *regd, *regd_copy = NULL;
 243         int ret, regd_len, pdev_id;
 244         struct ath11k_base *ab;
 245
 246         ab = ar->ab;
 247         pdev_id = ar->pdev_idx;
 248
 249         spin_lock_bh(&ab->base_lock);
 250
 251         /* Prefer the latest regd update over default if it's available */
 252         if (ab->new_regd[pdev_id]) {
 253                 regd = ab->new_regd[pdev_id];
 254         } else {
 255                 /* Apply the regd received during init through
 256                  * WMI_REG_CHAN_LIST_CC event. In case of failure to
 257                  * receive the regd, initialize with a default world
 258                  * regulatory.
 259                  */
 260                 if (ab->default_regd[pdev_id]) {
 261                         regd = ab->default_regd[pdev_id];
 262                 } else {
 263                         ath11k_warn(ab,
 264                                     "failed to receive default regd during init\n");
 265                         regd = (struct ieee80211_regdomain *)&ath11k_world_regd;
 266                 }
 267         }
 268
 269         if (!regd) {
 270                 ret = -EINVAL;
 271                 spin_unlock_bh(&ab->base_lock);
 272                 goto err;
 273         }
 274
 275         regd_len = sizeof(*regd) + (regd->n_reg_rules *
 276                 sizeof(struct ieee80211_reg_rule));
 277
 278         regd_copy = kzalloc(regd_len, GFP_ATOMIC);
 279         if (regd_copy)
 280                 ath11k_copy_regd(regd, regd_copy);
 281
 282         spin_unlock_bh(&ab->base_lock);
 283
 284         if (!regd_copy) {
 285                 ret = -ENOMEM;
 286                 goto err;
 287         }
 288
 289         ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy);
 290
 291         kfree(regd_copy);
 292
 293         if (ret)
 294                 goto err;
 295
 296         if (ar->state == ATH11K_STATE_ON) {
 297                 ret = ath11k_reg_update_chan_list(ar, true);
 298                 if (ret)
 299                         goto err;
 300         }
 301
 302         return 0;
 303 err:
 304         ath11k_warn(ab, "failed to perform regd update : %d\n", ret);
 305         return ret;
 306 }
 307
 308 static enum nl80211_dfs_regions
 309 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region)
 310 {
 311         switch (dfs_region) {
 312         case ATH11K_DFS_REG_FCC:
 313         case ATH11K_DFS_REG_CN:
 314                 return NL80211_DFS_FCC;
 315         case ATH11K_DFS_REG_ETSI:
 316         case ATH11K_DFS_REG_KR:
 317                 return NL80211_DFS_ETSI;
 318         case ATH11K_DFS_REG_MKK:
 319         case ATH11K_DFS_REG_MKK_N:
 320                 return NL80211_DFS_JP;
 321         default:
 322                 return NL80211_DFS_UNSET;
 323         }
 324 }
 325
 326 static u32 ath11k_map_fw_reg_flags(u16 reg_flags)
 327 {
 328         u32 flags = 0;
 329
 330         if (reg_flags & REGULATORY_CHAN_NO_IR)
 331                 flags = NL80211_RRF_NO_IR;
 332
 333         if (reg_flags & REGULATORY_CHAN_RADAR)
 334                 flags |= NL80211_RRF_DFS;
 335
 336         if (reg_flags & REGULATORY_CHAN_NO_OFDM)
 337                 flags |= NL80211_RRF_NO_OFDM;
 338
 339         if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY)
 340                 flags |= NL80211_RRF_NO_OUTDOOR;
 341
 342         if (reg_flags & REGULATORY_CHAN_NO_HT40)
 343                 flags |= NL80211_RRF_NO_HT40;
 344
 345         if (reg_flags & REGULATORY_CHAN_NO_80MHZ)
 346                 flags |= NL80211_RRF_NO_80MHZ;
 347
 348         if (reg_flags & REGULATORY_CHAN_NO_160MHZ)
 349                 flags |= NL80211_RRF_NO_160MHZ;
 350
 351         return flags;
 352 }
 353
 354 static u32 ath11k_map_fw_phy_flags(u32 phy_flags)
 355 {
 356         u32 flags = 0;
 357
 358         if (phy_flags & ATH11K_REG_PHY_BITMAP_NO11AX)
 359                 flags |= NL80211_RRF_NO_HE;
 360
 361         return flags;
 362 }
 363
 364 static bool
 365 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1,
 366                          struct ieee80211_reg_rule *rule2)
 367 {
 368         u32 start_freq1, end_freq1;
 369         u32 start_freq2, end_freq2;
 370
 371         start_freq1 = rule1->freq_range.start_freq_khz;
 372         start_freq2 = rule2->freq_range.start_freq_khz;
 373
 374         end_freq1 = rule1->freq_range.end_freq_khz;
 375         end_freq2 = rule2->freq_range.end_freq_khz;
 376
 377         if ((start_freq1 >= start_freq2 &&
 378              start_freq1 < end_freq2) ||
 379             (start_freq2 > start_freq1 &&
 380              start_freq2 < end_freq1))
 381                 return true;
 382
 383         /* TODO: Should we restrict intersection feasibility
 384          *  based on min bandwidth of the intersected region also,
 385          *  say the intersected rule should have a  min bandwidth
 386          * of 20MHz?
 387          */
 388
 389         return false;
 390 }
 391
 392 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1,
 393                                        struct ieee80211_reg_rule *rule2,
 394                                        struct ieee80211_reg_rule *new_rule)
 395 {
 396         u32 start_freq1, end_freq1;
 397         u32 start_freq2, end_freq2;
 398         u32 freq_diff, max_bw;
 399
 400         start_freq1 = rule1->freq_range.start_freq_khz;
 401         start_freq2 = rule2->freq_range.start_freq_khz;
 402
 403         end_freq1 = rule1->freq_range.end_freq_khz;
 404         end_freq2 = rule2->freq_range.end_freq_khz;
 405
 406         new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1,
 407                                                     start_freq2);
 408         new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2);
 409
 410         freq_diff = new_rule->freq_range.end_freq_khz -
 411                         new_rule->freq_range.start_freq_khz;
 412         max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz,
 413                        rule2->freq_range.max_bandwidth_khz);
 414         new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff);
 415
 416         new_rule->power_rule.max_antenna_gain =
 417                 min_t(u32, rule1->power_rule.max_antenna_gain,
 418                       rule2->power_rule.max_antenna_gain);
 419
 420         new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp,
 421                                               rule2->power_rule.max_eirp);
 422
 423         /* Use the flags of both the rules */
 424         new_rule->flags = rule1->flags | rule2->flags;
 425
 426         if ((rule1->flags & NL80211_RRF_PSD) && (rule2->flags & NL80211_RRF_PSD))
 427                 new_rule->psd = min_t(s8, rule1->psd, rule2->psd);
 428         else
 429                 new_rule->flags &= ~NL80211_RRF_PSD;
 430
 431         /* To be safe, lts use the max cac timeout of both rules */
 432         new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms,
 433                                      rule2->dfs_cac_ms);
 434 }
 435
 436 static struct ieee80211_regdomain *
 437 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd,
 438                       struct ieee80211_regdomain *curr_regd)
 439 {
 440         u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules;
 441         struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule;
 442         struct ieee80211_regdomain *new_regd = NULL;
 443         u8 i, j, k;
 444
 445         num_old_regd_rules = default_regd->n_reg_rules;
 446         num_curr_regd_rules = curr_regd->n_reg_rules;
 447         num_new_regd_rules = 0;
 448
 449         /* Find the number of intersecting rules to allocate new regd memory */
 450         for (i = 0; i < num_old_regd_rules; i++) {
 451                 old_rule = default_regd->reg_rules + i;
 452                 for (j = 0; j < num_curr_regd_rules; j++) {
 453                         curr_rule = curr_regd->reg_rules + j;
 454
 455                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 456                                 num_new_regd_rules++;
 457                 }
 458         }
 459
 460         if (!num_new_regd_rules)
 461                 return NULL;
 462
 463         new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules *
 464                         sizeof(struct ieee80211_reg_rule)),
 465                         GFP_ATOMIC);
 466
 467         if (!new_regd)
 468                 return NULL;
 469
 470         /* We set the new country and dfs region directly and only trim
 471          * the freq, power, antenna gain by intersecting with the
 472          * default regdomain. Also MAX of the dfs cac timeout is selected.
 473          */
 474         new_regd->n_reg_rules = num_new_regd_rules;
 475         memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2));
 476         new_regd->dfs_region = curr_regd->dfs_region;
 477         new_rule = new_regd->reg_rules;
 478
 479         for (i = 0, k = 0; i < num_old_regd_rules; i++) {
 480                 old_rule = default_regd->reg_rules + i;
 481                 for (j = 0; j < num_curr_regd_rules; j++) {
 482                         curr_rule = curr_regd->reg_rules + j;
 483
 484                         if (ath11k_reg_can_intersect(old_rule, curr_rule))
 485                                 ath11k_reg_intersect_rules(old_rule, curr_rule,
 486                                                            (new_rule + k++));
 487                 }
 488         }
 489         return new_regd;
 490 }
 491
 492 static const char *
 493 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region)
 494 {
 495         switch (dfs_region) {
 496         case NL80211_DFS_FCC:
 497                 return "FCC";
 498         case NL80211_DFS_ETSI:
 499                 return "ETSI";
 500         case NL80211_DFS_JP:
 501                 return "JP";
 502         default:
 503                 return "UNSET";
 504         }
 505 }
 506
 507 static u16
 508 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw)
 509 {
 510         u16 bw;
 511
 512         if (end_freq <= start_freq)
 513                 return 0;
 514
 515         bw = end_freq - start_freq;
 516         bw = min_t(u16, bw, max_bw);
 517
 518         if (bw >= 80 && bw < 160)
 519                 bw = 80;
 520         else if (bw >= 40 && bw < 80)
 521                 bw = 40;
 522         else if (bw >= 20 && bw < 40)
 523                 bw = 20;
 524         else
 525                 bw = 0;
 526
 527         return bw;
 528 }
 529
 530 static void
 531 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq,
 532                        u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr,
 533                        s8 psd, u32 reg_flags)
 534 {
 535         reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq);
 536         reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq);
 537         reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw);
 538         reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain);
 539         reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr);
 540         reg_rule->psd = psd;
 541         reg_rule->flags = reg_flags;
 542 }
 543
 544 static void
 545 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab,
 546                                      struct ieee80211_regdomain *regd,
 547                                      struct cur_reg_rule *reg_rule,
 548                                      u8 *rule_idx, u32 flags, u16 max_bw)
 549 {
 550         u32 start_freq;
 551         u32 end_freq;
 552         u16 bw;
 553         u8 i;
 554
 555         i = *rule_idx;
 556
 557         /* there might be situations when even the input rule must be dropped */
 558         i--;
 559
 560         /* frequencies below weather radar */
 561         bw = ath11k_reg_adjust_bw(reg_rule->start_freq,
 562                                   ETSI_WEATHER_RADAR_BAND_LOW, max_bw);
 563         if (bw > 0) {
 564                 i++;
 565
 566                 ath11k_reg_update_rule(regd->reg_rules + i,
 567                                        reg_rule->start_freq,
 568                                        ETSI_WEATHER_RADAR_BAND_LOW, bw,
 569                                        reg_rule->ant_gain, reg_rule->reg_power,
 570                                        reg_rule->psd_eirp, flags);
 571
 572                 ath11k_dbg(ab, ATH11K_DBG_REG,
 573                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 574                            i + 1, reg_rule->start_freq,
 575                            ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain,
 576                            reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
 577                            flags);
 578         }
 579
 580         /* weather radar frequencies */
 581         start_freq = max_t(u32, reg_rule->start_freq,
 582                            ETSI_WEATHER_RADAR_BAND_LOW);
 583         end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH);
 584
 585         bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw);
 586         if (bw > 0) {
 587                 i++;
 588
 589                 ath11k_reg_update_rule(regd->reg_rules + i, start_freq,
 590                                        end_freq, bw, reg_rule->ant_gain,
 591                                        reg_rule->reg_power, reg_rule->psd_eirp, flags);
 592
 593                 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT;
 594
 595                 ath11k_dbg(ab, ATH11K_DBG_REG,
 596                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 597                            i + 1, start_freq, end_freq, bw,
 598                            reg_rule->ant_gain, reg_rule->reg_power,
 599                            regd->reg_rules[i].dfs_cac_ms, flags);
 600         }
 601
 602         /* frequencies above weather radar */
 603         bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH,
 604                                   reg_rule->end_freq, max_bw);
 605         if (bw > 0) {
 606                 i++;
 607
 608                 ath11k_reg_update_rule(regd->reg_rules + i,
 609                                        ETSI_WEATHER_RADAR_BAND_HIGH,
 610                                        reg_rule->end_freq, bw,
 611                                        reg_rule->ant_gain, reg_rule->reg_power,
 612                                        reg_rule->psd_eirp, flags);
 613
 614                 ath11k_dbg(ab, ATH11K_DBG_REG,
 615                            "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 616                            i + 1, ETSI_WEATHER_RADAR_BAND_HIGH,
 617                            reg_rule->end_freq, bw, reg_rule->ant_gain,
 618                            reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms,
 619                            flags);
 620         }
 621
 622         *rule_idx = i;
 623 }
 624
 625 enum wmi_reg_6ghz_ap_type
 626 ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type)
 627 {
 628         switch (power_type) {
 629         case IEEE80211_REG_LPI_AP:
 630                 return WMI_REG_INDOOR_AP;
 631         case IEEE80211_REG_SP_AP:
 632                 return WMI_REG_STANDARD_POWER_AP;
 633         case IEEE80211_REG_VLP_AP:
 634                 return WMI_REG_VERY_LOW_POWER_AP;
 635         default:
 636                 return WMI_REG_MAX_AP_TYPE;
 637         }
 638 }
 639
 640 struct ieee80211_regdomain *
 641 ath11k_reg_build_regd(struct ath11k_base *ab,
 642                       struct cur_regulatory_info *reg_info, bool intersect,
 643                       enum wmi_vdev_type vdev_type,
 644                       enum ieee80211_ap_reg_power power_type)
 645 {
 646         struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL;
 647         struct cur_reg_rule *reg_rule, *reg_rule_6ghz;
 648         u8 i = 0, j = 0, k = 0;
 649         u8 num_rules;
 650         u16 max_bw;
 651         u32 flags, reg_6ghz_number, max_bw_6ghz;
 652         char alpha2[3];
 653
 654         num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules;
 655
 656         if (reg_info->is_ext_reg_event) {
 657                 if (vdev_type == WMI_VDEV_TYPE_STA) {
 658                         enum wmi_reg_6ghz_ap_type ap_type;
 659
 660                         ap_type = ath11k_reg_ap_pwr_convert(power_type);
 661
 662                         if (ap_type == WMI_REG_MAX_AP_TYPE)
 663                                 ap_type = WMI_REG_INDOOR_AP;
 664
 665                         reg_6ghz_number = reg_info->num_6ghz_rules_client
 666                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
 667
 668                         if (reg_6ghz_number == 0) {
 669                                 ap_type = WMI_REG_INDOOR_AP;
 670                                 reg_6ghz_number = reg_info->num_6ghz_rules_client
 671                                                 [ap_type][WMI_REG_DEFAULT_CLIENT];
 672                         }
 673
 674                         reg_rule_6ghz = reg_info->reg_rules_6ghz_client_ptr
 675                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
 676                         max_bw_6ghz = reg_info->max_bw_6ghz_client
 677                                         [ap_type][WMI_REG_DEFAULT_CLIENT];
 678                 } else {
 679                         reg_6ghz_number = reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP];
 680                         reg_rule_6ghz =
 681                                 reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP];
 682                         max_bw_6ghz = reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP];
 683                 }
 684
 685                 num_rules += reg_6ghz_number;
 686         }
 687
 688         if (!num_rules)
 689                 goto ret;
 690
 691         /* Add max additional rules to accommodate weather radar band */
 692         if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI)
 693                 num_rules += 2;
 694
 695         tmp_regd =  kzalloc(sizeof(*tmp_regd) +
 696                         (num_rules * sizeof(struct ieee80211_reg_rule)),
 697                         GFP_ATOMIC);
 698         if (!tmp_regd)
 699                 goto ret;
 700
 701         memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 702         memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1);
 703         alpha2[2] = '\0';
 704         tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region);
 705
 706         ath11k_dbg(ab, ATH11K_DBG_REG,
 707                    "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n",
 708                    alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region),
 709                    reg_info->dfs_region, num_rules);
 710         /* Update reg_rules[] below. Firmware is expected to
 711          * send these rules in order(2 GHz rules first and then 5 GHz)
 712          */
 713         for (; i < num_rules; i++) {
 714                 if (reg_info->num_2ghz_reg_rules &&
 715                     (i < reg_info->num_2ghz_reg_rules)) {
 716                         reg_rule = reg_info->reg_rules_2ghz_ptr + i;
 717                         max_bw = min_t(u16, reg_rule->max_bw,
 718                                        reg_info->max_bw_2ghz);
 719                         flags = 0;
 720                 } else if (reg_info->num_5ghz_reg_rules &&
 721                            (j < reg_info->num_5ghz_reg_rules)) {
 722                         reg_rule = reg_info->reg_rules_5ghz_ptr + j++;
 723                         max_bw = min_t(u16, reg_rule->max_bw,
 724                                        reg_info->max_bw_5ghz);
 725
 726                         /* FW doesn't pass NL80211_RRF_AUTO_BW flag for
 727                          * BW Auto correction, we can enable this by default
 728                          * for all 5G rules here. The regulatory core performs
 729                          * BW correction if required and applies flags as
 730                          * per other BW rule flags we pass from here
 731                          */
 732                         flags = NL80211_RRF_AUTO_BW;
 733                 } else if (reg_info->is_ext_reg_event && reg_6ghz_number &&
 734                            k < reg_6ghz_number) {
 735                         reg_rule = reg_rule_6ghz + k++;
 736                         max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz);
 737                         flags = NL80211_RRF_AUTO_BW;
 738                         if (reg_rule->psd_flag)
 739                                 flags |= NL80211_RRF_PSD;
 740                 } else {
 741                         break;
 742                 }
 743
 744                 flags |= ath11k_map_fw_reg_flags(reg_rule->flags);
 745                 flags |= ath11k_map_fw_phy_flags(reg_info->phybitmap);
 746
 747                 ath11k_reg_update_rule(tmp_regd->reg_rules + i,
 748                                        reg_rule->start_freq,
 749                                        reg_rule->end_freq, max_bw,
 750                                        reg_rule->ant_gain, reg_rule->reg_power,
 751                                        reg_rule->psd_eirp, flags);
 752
 753                 /* Update dfs cac timeout if the dfs domain is ETSI and the
 754                  * new rule covers weather radar band.
 755                  * Default value of '0' corresponds to 60s timeout, so no
 756                  * need to update that for other rules.
 757                  */
 758                 if (flags & NL80211_RRF_DFS &&
 759                     reg_info->dfs_region == ATH11K_DFS_REG_ETSI &&
 760                     (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW &&
 761                     reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){
 762                         ath11k_reg_update_weather_radar_band(ab, tmp_regd,
 763                                                              reg_rule, &i,
 764                                                              flags, max_bw);
 765                         continue;
 766                 }
 767
 768                 if (reg_info->is_ext_reg_event) {
 769                         ath11k_dbg(ab, ATH11K_DBG_REG,
 770                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n",
 771                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 772                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 773                                    tmp_regd->reg_rules[i].dfs_cac_ms, flags,
 774                                    reg_rule->psd_flag, reg_rule->psd_eirp);
 775                 } else {
 776                         ath11k_dbg(ab, ATH11K_DBG_REG,
 777                                    "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n",
 778                                    i + 1, reg_rule->start_freq, reg_rule->end_freq,
 779                                    max_bw, reg_rule->ant_gain, reg_rule->reg_power,
 780                                    tmp_regd->reg_rules[i].dfs_cac_ms,
 781                                    flags);
 782                 }
 783         }
 784
 785         tmp_regd->n_reg_rules = i;
 786
 787         if (intersect) {
 788                 default_regd = ab->default_regd[reg_info->phy_id];
 789
 790                 /* Get a new regd by intersecting the received regd with
 791                  * our default regd.
 792                  */
 793                 new_regd = ath11k_regd_intersect(default_regd, tmp_regd);
 794                 kfree(tmp_regd);
 795                 if (!new_regd) {
 796                         ath11k_warn(ab, "Unable to create intersected regdomain\n");
 797                         goto ret;
 798                 }
 799         } else {
 800                 new_regd = tmp_regd;
 801         }
 802
 803 ret:
 804         return new_regd;
 805 }
 806
 807 static bool ath11k_reg_is_world_alpha(char *alpha)
 808 {
 809         if (alpha[0] == '0' && alpha[1] == '0')
 810                 return true;
 811
 812         if (alpha[0] == 'n' && alpha[1] == 'a')
 813                 return true;
 814
 815         return false;
 816 }
 817
 818 static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar)
 819 {
 820         struct ath11k_vif *arvif;
 821
 822         /* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy
 823          * and one struct ieee80211_regdomain, so it could only store one group
 824          * reg rules. It means multi-interface concurrency in the same ath11k is
 825          * not support for the regdomain. So get the vdev type of the first entry
 826          * now. After concurrency support for the regdomain, this should change.
 827          */
 828         arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list);
 829         if (arvif)
 830                 return arvif->vdev_type;
 831
 832         return WMI_VDEV_TYPE_UNSPEC;
 833 }
 834
 835 int ath11k_reg_handle_chan_list(struct ath11k_base *ab,
 836                                 struct cur_regulatory_info *reg_info,
 837                                 enum ieee80211_ap_reg_power power_type)
 838 {
 839         struct ieee80211_regdomain *regd;
 840         bool intersect = false;
 841         int pdev_idx;
 842         struct ath11k *ar;
 843         enum wmi_vdev_type vdev_type;
 844
 845         ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list");
 846
 847         if (reg_info->status_code != REG_SET_CC_STATUS_PASS) {
 848                 /* In case of failure to set the requested ctry,
 849                  * fw retains the current regd. We print a failure info
 850                  * and return from here.
 851                  */
 852                 ath11k_warn(ab, "Failed to set the requested Country regulatory setting\n");
 853                 return -EINVAL;
 854         }
 855
 856         pdev_idx = reg_info->phy_id;
 857
 858         /* Avoid default reg rule updates sent during FW recovery if
 859          * it is already available
 860          */
 861         spin_lock_bh(&ab->base_lock);
 862         if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) &&
 863             ab->default_regd[pdev_idx]) {
 864                 spin_unlock_bh(&ab->base_lock);
 865                 goto retfail;
 866         }
 867         spin_unlock_bh(&ab->base_lock);
 868
 869         if (pdev_idx >= ab->num_radios) {
 870                 /* Process the event for phy0 only if single_pdev_only
 871                  * is true. If pdev_idx is valid but not 0, discard the
 872                  * event. Otherwise, it goes to fallback. In either case
 873                  * ath11k_reg_reset_info() needs to be called to avoid
 874                  * memory leak issue.
 875                  */
 876                 ath11k_reg_reset_info(reg_info);
 877
 878                 if (ab->hw_params.single_pdev_only &&
 879                     pdev_idx < ab->hw_params.num_rxdma_per_pdev)
 880                         return 0;
 881                 goto fallback;
 882         }
 883
 884         /* Avoid multiple overwrites to default regd, during core
 885          * stop-start after mac registration.
 886          */
 887         if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] &&
 888             !memcmp((char *)ab->default_regd[pdev_idx]->alpha2,
 889                     (char *)reg_info->alpha2, 2))
 890                 goto retfail;
 891
 892         /* Intersect new rules with default regd if a new country setting was
 893          * requested, i.e a default regd was already set during initialization
 894          * and the regd coming from this event has a valid country info.
 895          */
 896         if (ab->default_regd[pdev_idx] &&
 897             !ath11k_reg_is_world_alpha((char *)
 898                 ab->default_regd[pdev_idx]->alpha2) &&
 899             !ath11k_reg_is_world_alpha((char *)reg_info->alpha2))
 900                 intersect = true;
 901
 902         ar = ab->pdevs[pdev_idx].ar;
 903         vdev_type = ath11k_reg_get_ar_vdev_type(ar);
 904
 905         ath11k_dbg(ab, ATH11K_DBG_WMI,
 906                    "wmi handle chan list power type %d vdev type %d intersect %d\n",
 907                    power_type, vdev_type, intersect);
 908
 909         regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type);
 910         if (!regd) {
 911                 ath11k_warn(ab, "failed to build regd from reg_info\n");
 912                 goto fallback;
 913         }
 914
 915         if (power_type == IEEE80211_REG_UNSET_AP) {
 916                 ath11k_reg_reset_info(&ab->reg_info_store[pdev_idx]);
 917                 ab->reg_info_store[pdev_idx] = *reg_info;
 918         }
 919
 920         spin_lock_bh(&ab->base_lock);
 921         if (ab->default_regd[pdev_idx]) {
 922                 /* The initial rules from FW after WMI Init is to build
 923                  * the default regd. From then on, any rules updated for
 924                  * the pdev could be due to user reg changes.
 925                  * Free previously built regd before assigning the newly
 926                  * generated regd to ar. NULL pointer handling will be
 927                  * taken care by kfree itself.
 928                  */
 929                 ar = ab->pdevs[pdev_idx].ar;
 930                 kfree(ab->new_regd[pdev_idx]);
 931                 ab->new_regd[pdev_idx] = regd;
 932                 queue_work(ab->workqueue, &ar->regd_update_work);
 933         } else {
 934                 /* This regd would be applied during mac registration and is
 935                  * held constant throughout for regd intersection purpose
 936                  */
 937                 ab->default_regd[pdev_idx] = regd;
 938         }
 939         ab->dfs_region = reg_info->dfs_region;
 940         spin_unlock_bh(&ab->base_lock);
 941
 942         return 0;
 943
 944 fallback:
 945         /* Fallback to older reg (by sending previous country setting
 946          * again if fw has succeeded and we failed to process here.
 947          * The Regdomain should be uniform across driver and fw. Since the
 948          * FW has processed the command and sent a success status, we expect
 949          * this function to succeed as well. If it doesn't, CTRY needs to be
 950          * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent.
 951          */
 952         /* TODO: This is rare, but still should also be handled */
 953         WARN_ON(1);
 954
 955 retfail:
 956
 957         return -EINVAL;
 958 }
 959
 960 void ath11k_regd_update_work(struct work_struct *work)
 961 {
 962         struct ath11k *ar = container_of(work, struct ath11k,
 963                                          regd_update_work);
 964         int ret;
 965
 966         ret = ath11k_regd_update(ar);
 967         if (ret) {
 968                 /* Firmware has already moved to the new regd. We need
 969                  * to maintain channel consistency across FW, Host driver
 970                  * and userspace. Hence as a fallback mechanism we can set
 971                  * the prev or default country code to the firmware.
 972                  */
 973                 /* TODO: Implement Fallback Mechanism */
 974         }
 975 }
 976
 977 void ath11k_reg_init(struct ath11k *ar)
 978 {
 979         ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED;
 980         ar->hw->wiphy->reg_notifier = ath11k_reg_notifier;
 981 }
 982
 983 void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info)
 984 {
 985         int i, j;
 986
 987         if (!reg_info)
 988                 return;
 989
 990         kfree(reg_info->reg_rules_2ghz_ptr);
 991         kfree(reg_info->reg_rules_5ghz_ptr);
 992
 993         for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) {
 994                 kfree(reg_info->reg_rules_6ghz_ap_ptr[i]);
 995
 996                 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++)
 997                         kfree(reg_info->reg_rules_6ghz_client_ptr[i][j]);
 998         }
 999
1000         memset(reg_info, 0, sizeof(*reg_info));
1001 }
1002
1003 void ath11k_reg_free(struct ath11k_base *ab)
1004 {
1005         int i;
1006
1007         for (i = 0; i < ab->num_radios; i++)
1008                 ath11k_reg_reset_info(&ab->reg_info_store[i]);
1009
1010         kfree(ab->reg_info_store);
1011         ab->reg_info_store = NULL;
1012
1013         for (i = 0; i < ab->hw_params.max_radios; i++) {
1014                 kfree(ab->default_regd[i]);
1015                 kfree(ab->new_regd[i]);
1016         }
1017 }
1018
1019 int ath11k_reg_set_cc(struct ath11k *ar)
1020 {
1021         struct wmi_set_current_country_params set_current_param = {};
1022
1023         memcpy(&set_current_param.alpha2, ar->alpha2, 2);
1024         return ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param);
1025 }