1 // SPDX-License-Identifier: BSD-3-Clause-Clear 2 /* 3 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved. 4 * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. 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 if (request->initiator == NL80211_REGDOM_SET_BY_DRIVER) { 59 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 60 "driver initiated regd update\n"); 61 if (ar->state != ATH11K_STATE_ON) 62 return; 63 64 ret = ath11k_reg_update_chan_list(ar, true); 65 if (ret) 66 ath11k_warn(ar->ab, "failed to update channel list: %d\n", ret); 67 68 return; 69 } 70 71 /* Currently supporting only General User Hints. Cell base user 72 * hints to be handled later. 73 * Hints from other sources like Core, Beacons are not expected for 74 * self managed wiphy's 75 */ 76 if (!(request->initiator == NL80211_REGDOM_SET_BY_USER && 77 request->user_reg_hint_type == NL80211_USER_REG_HINT_USER)) { 78 ath11k_warn(ar->ab, "Unexpected Regulatory event for this wiphy\n"); 79 return; 80 } 81 82 if (!IS_ENABLED(CONFIG_ATH_REG_DYNAMIC_USER_REG_HINTS)) { 83 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 84 "Country Setting is not allowed\n"); 85 return; 86 } 87 88 if (!ath11k_regdom_changes(ar, request->alpha2)) { 89 ath11k_dbg(ar->ab, ATH11K_DBG_REG, "Country is already set\n"); 90 return; 91 } 92 93 /* Set the country code to the firmware and will receive 94 * the WMI_REG_CHAN_LIST_CC EVENT for updating the 95 * reg info 96 */ 97 if (ar->ab->hw_params.current_cc_support) { 98 memcpy(&ar->alpha2, request->alpha2, 2); 99 ret = ath11k_reg_set_cc(ar); 100 if (ret) 101 ath11k_warn(ar->ab, 102 "failed set current country code: %d\n", ret); 103 } else { 104 init_country_param.flags = ALPHA_IS_SET; 105 memcpy(&init_country_param.cc_info.alpha2, request->alpha2, 2); 106 init_country_param.cc_info.alpha2[2] = 0; 107 108 ret = ath11k_wmi_send_init_country_cmd(ar, init_country_param); 109 if (ret) 110 ath11k_warn(ar->ab, 111 "INIT Country code set to fw failed : %d\n", ret); 112 } 113 114 ath11k_mac_11d_scan_stop(ar); 115 ar->regdom_set_by_user = true; 116 } 117 118 int ath11k_reg_update_chan_list(struct ath11k *ar, bool wait) 119 { 120 struct ieee80211_supported_band **bands; 121 struct scan_chan_list_params *params; 122 struct ieee80211_channel *channel; 123 struct ieee80211_hw *hw = ar->hw; 124 struct channel_param *ch; 125 enum nl80211_band band; 126 int num_channels = 0; 127 int i, ret = 0; 128 129 if (ar->state == ATH11K_STATE_RESTARTING) 130 return 0; 131 132 bands = hw->wiphy->bands; 133 for (band = 0; band < NUM_NL80211_BANDS; band++) { 134 if (!bands[band]) 135 continue; 136 137 for (i = 0; i < bands[band]->n_channels; i++) { 138 if (bands[band]->channels[i].flags & 139 IEEE80211_CHAN_DISABLED) 140 continue; 141 142 num_channels++; 143 } 144 } 145 146 if (WARN_ON(!num_channels)) 147 return -EINVAL; 148 149 params = kzalloc_flex(*params, ch_param, num_channels); 150 if (!params) 151 return -ENOMEM; 152 153 params->pdev_id = ar->pdev->pdev_id; 154 params->nallchans = num_channels; 155 156 ch = params->ch_param; 157 158 for (band = 0; band < NUM_NL80211_BANDS; band++) { 159 if (!bands[band]) 160 continue; 161 162 for (i = 0; i < bands[band]->n_channels; i++) { 163 channel = &bands[band]->channels[i]; 164 165 if (channel->flags & IEEE80211_CHAN_DISABLED) 166 continue; 167 168 /* TODO: Set to true/false based on some condition? */ 169 ch->allow_ht = true; 170 ch->allow_vht = true; 171 ch->allow_he = true; 172 173 ch->dfs_set = 174 !!(channel->flags & IEEE80211_CHAN_RADAR); 175 ch->is_chan_passive = !!(channel->flags & 176 IEEE80211_CHAN_NO_IR); 177 ch->is_chan_passive |= ch->dfs_set; 178 ch->mhz = channel->center_freq; 179 ch->cfreq1 = channel->center_freq; 180 ch->minpower = 0; 181 ch->maxpower = channel->max_power * 2; 182 ch->maxregpower = channel->max_reg_power * 2; 183 ch->antennamax = channel->max_antenna_gain * 2; 184 185 /* TODO: Use appropriate phymodes */ 186 if (channel->band == NL80211_BAND_2GHZ) 187 ch->phy_mode = MODE_11G; 188 else 189 ch->phy_mode = MODE_11A; 190 191 if (channel->band == NL80211_BAND_6GHZ && 192 cfg80211_channel_is_psc(channel)) 193 ch->psc_channel = true; 194 195 ath11k_dbg(ar->ab, ATH11K_DBG_WMI, 196 "mac channel [%d/%d] freq %d maxpower %d regpower %d antenna %d mode %d\n", 197 i, params->nallchans, 198 ch->mhz, ch->maxpower, ch->maxregpower, 199 ch->antennamax, ch->phy_mode); 200 201 ch++; 202 /* TODO: use quarrter/half rate, cfreq12, dfs_cfreq2 203 * set_agile, reg_class_idx 204 */ 205 } 206 } 207 208 if (wait) { 209 spin_lock_bh(&ar->data_lock); 210 list_add_tail(¶ms->list, &ar->channel_update_queue); 211 spin_unlock_bh(&ar->data_lock); 212 213 queue_work(ar->ab->workqueue, &ar->channel_update_work); 214 215 return 0; 216 } 217 218 ret = ath11k_wmi_send_scan_chan_list_cmd(ar, params); 219 kfree(params); 220 221 return ret; 222 } 223 224 static void ath11k_copy_regd(struct ieee80211_regdomain *regd_orig, 225 struct ieee80211_regdomain *regd_copy) 226 { 227 u8 i; 228 229 /* The caller should have checked error conditions */ 230 memcpy(regd_copy, regd_orig, sizeof(*regd_orig)); 231 232 for (i = 0; i < regd_orig->n_reg_rules; i++) 233 memcpy(®d_copy->reg_rules[i], ®d_orig->reg_rules[i], 234 sizeof(struct ieee80211_reg_rule)); 235 } 236 237 int ath11k_regd_update(struct ath11k *ar) 238 { 239 struct ieee80211_regdomain *regd, *regd_copy = NULL; 240 int ret, regd_len, pdev_id; 241 struct ath11k_base *ab; 242 243 ab = ar->ab; 244 pdev_id = ar->pdev_idx; 245 246 spin_lock_bh(&ab->base_lock); 247 248 /* Prefer the latest regd update over default if it's available */ 249 if (ab->new_regd[pdev_id]) { 250 regd = ab->new_regd[pdev_id]; 251 } else { 252 /* Apply the regd received during init through 253 * WMI_REG_CHAN_LIST_CC event. In case of failure to 254 * receive the regd, initialize with a default world 255 * regulatory. 256 */ 257 if (ab->default_regd[pdev_id]) { 258 regd = ab->default_regd[pdev_id]; 259 } else { 260 ath11k_warn(ab, 261 "failed to receive default regd during init\n"); 262 regd = (struct ieee80211_regdomain *)&ath11k_world_regd; 263 } 264 } 265 266 if (!regd) { 267 ret = -EINVAL; 268 spin_unlock_bh(&ab->base_lock); 269 goto err; 270 } 271 272 regd_len = sizeof(*regd) + (regd->n_reg_rules * 273 sizeof(struct ieee80211_reg_rule)); 274 275 regd_copy = kzalloc(regd_len, GFP_ATOMIC); 276 if (regd_copy) 277 ath11k_copy_regd(regd, regd_copy); 278 279 spin_unlock_bh(&ab->base_lock); 280 281 if (!regd_copy) { 282 ret = -ENOMEM; 283 goto err; 284 } 285 286 ret = regulatory_set_wiphy_regd(ar->hw->wiphy, regd_copy); 287 288 kfree(regd_copy); 289 290 if (ret) 291 goto err; 292 293 return 0; 294 err: 295 ath11k_warn(ab, "failed to perform regd update : %d\n", ret); 296 return ret; 297 } 298 299 static enum nl80211_dfs_regions 300 ath11k_map_fw_dfs_region(enum ath11k_dfs_region dfs_region) 301 { 302 switch (dfs_region) { 303 case ATH11K_DFS_REG_FCC: 304 case ATH11K_DFS_REG_CN: 305 return NL80211_DFS_FCC; 306 case ATH11K_DFS_REG_ETSI: 307 case ATH11K_DFS_REG_KR: 308 return NL80211_DFS_ETSI; 309 case ATH11K_DFS_REG_MKK: 310 case ATH11K_DFS_REG_MKK_N: 311 return NL80211_DFS_JP; 312 default: 313 return NL80211_DFS_UNSET; 314 } 315 } 316 317 static u32 ath11k_map_fw_reg_flags(u16 reg_flags) 318 { 319 u32 flags = 0; 320 321 if (reg_flags & REGULATORY_CHAN_NO_IR) 322 flags = NL80211_RRF_NO_IR; 323 324 if (reg_flags & REGULATORY_CHAN_RADAR) 325 flags |= NL80211_RRF_DFS; 326 327 if (reg_flags & REGULATORY_CHAN_NO_OFDM) 328 flags |= NL80211_RRF_NO_OFDM; 329 330 if (reg_flags & REGULATORY_CHAN_INDOOR_ONLY) 331 flags |= NL80211_RRF_NO_OUTDOOR; 332 333 if (reg_flags & REGULATORY_CHAN_NO_HT40) 334 flags |= NL80211_RRF_NO_HT40; 335 336 if (reg_flags & REGULATORY_CHAN_NO_80MHZ) 337 flags |= NL80211_RRF_NO_80MHZ; 338 339 if (reg_flags & REGULATORY_CHAN_NO_160MHZ) 340 flags |= NL80211_RRF_NO_160MHZ; 341 342 return flags; 343 } 344 345 static u32 ath11k_map_fw_phy_flags(u32 phy_flags) 346 { 347 u32 flags = 0; 348 349 if (phy_flags & ATH11K_REG_PHY_BITMAP_NO11AX) 350 flags |= NL80211_RRF_NO_HE; 351 352 return flags; 353 } 354 355 static bool 356 ath11k_reg_can_intersect(struct ieee80211_reg_rule *rule1, 357 struct ieee80211_reg_rule *rule2) 358 { 359 u32 start_freq1, end_freq1; 360 u32 start_freq2, end_freq2; 361 362 start_freq1 = rule1->freq_range.start_freq_khz; 363 start_freq2 = rule2->freq_range.start_freq_khz; 364 365 end_freq1 = rule1->freq_range.end_freq_khz; 366 end_freq2 = rule2->freq_range.end_freq_khz; 367 368 if ((start_freq1 >= start_freq2 && 369 start_freq1 < end_freq2) || 370 (start_freq2 > start_freq1 && 371 start_freq2 < end_freq1)) 372 return true; 373 374 /* TODO: Should we restrict intersection feasibility 375 * based on min bandwidth of the intersected region also, 376 * say the intersected rule should have a min bandwidth 377 * of 20MHz? 378 */ 379 380 return false; 381 } 382 383 static void ath11k_reg_intersect_rules(struct ieee80211_reg_rule *rule1, 384 struct ieee80211_reg_rule *rule2, 385 struct ieee80211_reg_rule *new_rule) 386 { 387 u32 start_freq1, end_freq1; 388 u32 start_freq2, end_freq2; 389 u32 freq_diff, max_bw; 390 391 start_freq1 = rule1->freq_range.start_freq_khz; 392 start_freq2 = rule2->freq_range.start_freq_khz; 393 394 end_freq1 = rule1->freq_range.end_freq_khz; 395 end_freq2 = rule2->freq_range.end_freq_khz; 396 397 new_rule->freq_range.start_freq_khz = max_t(u32, start_freq1, 398 start_freq2); 399 new_rule->freq_range.end_freq_khz = min_t(u32, end_freq1, end_freq2); 400 401 freq_diff = new_rule->freq_range.end_freq_khz - 402 new_rule->freq_range.start_freq_khz; 403 max_bw = min_t(u32, rule1->freq_range.max_bandwidth_khz, 404 rule2->freq_range.max_bandwidth_khz); 405 new_rule->freq_range.max_bandwidth_khz = min_t(u32, max_bw, freq_diff); 406 407 new_rule->power_rule.max_antenna_gain = 408 min_t(u32, rule1->power_rule.max_antenna_gain, 409 rule2->power_rule.max_antenna_gain); 410 411 new_rule->power_rule.max_eirp = min_t(u32, rule1->power_rule.max_eirp, 412 rule2->power_rule.max_eirp); 413 414 /* Use the flags of both the rules */ 415 new_rule->flags = rule1->flags | rule2->flags; 416 417 if ((rule1->flags & NL80211_RRF_PSD) && (rule2->flags & NL80211_RRF_PSD)) 418 new_rule->psd = min_t(s8, rule1->psd, rule2->psd); 419 else 420 new_rule->flags &= ~NL80211_RRF_PSD; 421 422 /* To be safe, lts use the max cac timeout of both rules */ 423 new_rule->dfs_cac_ms = max_t(u32, rule1->dfs_cac_ms, 424 rule2->dfs_cac_ms); 425 } 426 427 static struct ieee80211_regdomain * 428 ath11k_regd_intersect(struct ieee80211_regdomain *default_regd, 429 struct ieee80211_regdomain *curr_regd) 430 { 431 u8 num_old_regd_rules, num_curr_regd_rules, num_new_regd_rules; 432 struct ieee80211_reg_rule *old_rule, *curr_rule, *new_rule; 433 struct ieee80211_regdomain *new_regd = NULL; 434 u8 i, j, k; 435 436 num_old_regd_rules = default_regd->n_reg_rules; 437 num_curr_regd_rules = curr_regd->n_reg_rules; 438 num_new_regd_rules = 0; 439 440 /* Find the number of intersecting rules to allocate new regd memory */ 441 for (i = 0; i < num_old_regd_rules; i++) { 442 old_rule = default_regd->reg_rules + i; 443 for (j = 0; j < num_curr_regd_rules; j++) { 444 curr_rule = curr_regd->reg_rules + j; 445 446 if (ath11k_reg_can_intersect(old_rule, curr_rule)) 447 num_new_regd_rules++; 448 } 449 } 450 451 if (!num_new_regd_rules) 452 return NULL; 453 454 new_regd = kzalloc(sizeof(*new_regd) + (num_new_regd_rules * 455 sizeof(struct ieee80211_reg_rule)), 456 GFP_ATOMIC); 457 458 if (!new_regd) 459 return NULL; 460 461 /* We set the new country and dfs region directly and only trim 462 * the freq, power, antenna gain by intersecting with the 463 * default regdomain. Also MAX of the dfs cac timeout is selected. 464 */ 465 new_regd->n_reg_rules = num_new_regd_rules; 466 memcpy(new_regd->alpha2, curr_regd->alpha2, sizeof(new_regd->alpha2)); 467 new_regd->dfs_region = curr_regd->dfs_region; 468 new_rule = new_regd->reg_rules; 469 470 for (i = 0, k = 0; i < num_old_regd_rules; i++) { 471 old_rule = default_regd->reg_rules + i; 472 for (j = 0; j < num_curr_regd_rules; j++) { 473 curr_rule = curr_regd->reg_rules + j; 474 475 if (ath11k_reg_can_intersect(old_rule, curr_rule)) 476 ath11k_reg_intersect_rules(old_rule, curr_rule, 477 (new_rule + k++)); 478 } 479 } 480 return new_regd; 481 } 482 483 static const char * 484 ath11k_reg_get_regdom_str(enum nl80211_dfs_regions dfs_region) 485 { 486 switch (dfs_region) { 487 case NL80211_DFS_FCC: 488 return "FCC"; 489 case NL80211_DFS_ETSI: 490 return "ETSI"; 491 case NL80211_DFS_JP: 492 return "JP"; 493 default: 494 return "UNSET"; 495 } 496 } 497 498 static u16 499 ath11k_reg_adjust_bw(u16 start_freq, u16 end_freq, u16 max_bw) 500 { 501 u16 bw; 502 503 if (end_freq <= start_freq) 504 return 0; 505 506 bw = end_freq - start_freq; 507 bw = min_t(u16, bw, max_bw); 508 509 if (bw >= 80 && bw < 160) 510 bw = 80; 511 else if (bw >= 40 && bw < 80) 512 bw = 40; 513 else if (bw >= 20 && bw < 40) 514 bw = 20; 515 else 516 bw = 0; 517 518 return bw; 519 } 520 521 static void 522 ath11k_reg_update_rule(struct ieee80211_reg_rule *reg_rule, u32 start_freq, 523 u32 end_freq, u32 bw, u32 ant_gain, u32 reg_pwr, 524 s8 psd, u32 reg_flags) 525 { 526 reg_rule->freq_range.start_freq_khz = MHZ_TO_KHZ(start_freq); 527 reg_rule->freq_range.end_freq_khz = MHZ_TO_KHZ(end_freq); 528 reg_rule->freq_range.max_bandwidth_khz = MHZ_TO_KHZ(bw); 529 reg_rule->power_rule.max_antenna_gain = DBI_TO_MBI(ant_gain); 530 reg_rule->power_rule.max_eirp = DBM_TO_MBM(reg_pwr); 531 reg_rule->psd = psd; 532 reg_rule->flags = reg_flags; 533 } 534 535 static void 536 ath11k_reg_update_weather_radar_band(struct ath11k_base *ab, 537 struct ieee80211_regdomain *regd, 538 struct cur_reg_rule *reg_rule, 539 u8 *rule_idx, u32 flags, u16 max_bw) 540 { 541 u32 start_freq; 542 u32 end_freq; 543 u16 bw; 544 u8 i; 545 546 i = *rule_idx; 547 548 /* there might be situations when even the input rule must be dropped */ 549 i--; 550 551 /* frequencies below weather radar */ 552 bw = ath11k_reg_adjust_bw(reg_rule->start_freq, 553 ETSI_WEATHER_RADAR_BAND_LOW, max_bw); 554 if (bw > 0) { 555 i++; 556 557 ath11k_reg_update_rule(regd->reg_rules + i, 558 reg_rule->start_freq, 559 ETSI_WEATHER_RADAR_BAND_LOW, bw, 560 reg_rule->ant_gain, reg_rule->reg_power, 561 reg_rule->psd_eirp, flags); 562 563 ath11k_dbg(ab, ATH11K_DBG_REG, 564 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n", 565 i + 1, reg_rule->start_freq, 566 ETSI_WEATHER_RADAR_BAND_LOW, bw, reg_rule->ant_gain, 567 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms, 568 flags); 569 } 570 571 /* weather radar frequencies */ 572 start_freq = max_t(u32, reg_rule->start_freq, 573 ETSI_WEATHER_RADAR_BAND_LOW); 574 end_freq = min_t(u32, reg_rule->end_freq, ETSI_WEATHER_RADAR_BAND_HIGH); 575 576 bw = ath11k_reg_adjust_bw(start_freq, end_freq, max_bw); 577 if (bw > 0) { 578 i++; 579 580 ath11k_reg_update_rule(regd->reg_rules + i, start_freq, 581 end_freq, bw, reg_rule->ant_gain, 582 reg_rule->reg_power, reg_rule->psd_eirp, flags); 583 584 regd->reg_rules[i].dfs_cac_ms = ETSI_WEATHER_RADAR_BAND_CAC_TIMEOUT; 585 586 ath11k_dbg(ab, ATH11K_DBG_REG, 587 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n", 588 i + 1, start_freq, end_freq, bw, 589 reg_rule->ant_gain, reg_rule->reg_power, 590 regd->reg_rules[i].dfs_cac_ms, flags); 591 } 592 593 /* frequencies above weather radar */ 594 bw = ath11k_reg_adjust_bw(ETSI_WEATHER_RADAR_BAND_HIGH, 595 reg_rule->end_freq, max_bw); 596 if (bw > 0) { 597 i++; 598 599 ath11k_reg_update_rule(regd->reg_rules + i, 600 ETSI_WEATHER_RADAR_BAND_HIGH, 601 reg_rule->end_freq, bw, 602 reg_rule->ant_gain, reg_rule->reg_power, 603 reg_rule->psd_eirp, flags); 604 605 ath11k_dbg(ab, ATH11K_DBG_REG, 606 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n", 607 i + 1, ETSI_WEATHER_RADAR_BAND_HIGH, 608 reg_rule->end_freq, bw, reg_rule->ant_gain, 609 reg_rule->reg_power, regd->reg_rules[i].dfs_cac_ms, 610 flags); 611 } 612 613 *rule_idx = i; 614 } 615 616 enum wmi_reg_6ghz_ap_type 617 ath11k_reg_ap_pwr_convert(enum ieee80211_ap_reg_power power_type) 618 { 619 switch (power_type) { 620 case IEEE80211_REG_LPI_AP: 621 return WMI_REG_INDOOR_AP; 622 case IEEE80211_REG_SP_AP: 623 return WMI_REG_STANDARD_POWER_AP; 624 case IEEE80211_REG_VLP_AP: 625 return WMI_REG_VERY_LOW_POWER_AP; 626 default: 627 return WMI_REG_MAX_AP_TYPE; 628 } 629 } 630 631 struct ieee80211_regdomain * 632 ath11k_reg_build_regd(struct ath11k_base *ab, 633 struct cur_regulatory_info *reg_info, bool intersect, 634 enum wmi_vdev_type vdev_type, 635 enum ieee80211_ap_reg_power power_type) 636 { 637 struct ieee80211_regdomain *tmp_regd, *default_regd, *new_regd = NULL; 638 struct cur_reg_rule *reg_rule, *reg_rule_6ghz; 639 u8 i = 0, j = 0, k = 0; 640 u8 num_rules; 641 u16 max_bw; 642 u32 flags, reg_6ghz_number, max_bw_6ghz; 643 char alpha2[3]; 644 645 num_rules = reg_info->num_5ghz_reg_rules + reg_info->num_2ghz_reg_rules; 646 647 if (reg_info->is_ext_reg_event) { 648 if (vdev_type == WMI_VDEV_TYPE_STA) { 649 enum wmi_reg_6ghz_ap_type ap_type; 650 651 ap_type = ath11k_reg_ap_pwr_convert(power_type); 652 653 if (ap_type == WMI_REG_MAX_AP_TYPE) 654 ap_type = WMI_REG_INDOOR_AP; 655 656 reg_6ghz_number = reg_info->num_6ghz_rules_client 657 [ap_type][WMI_REG_DEFAULT_CLIENT]; 658 659 if (reg_6ghz_number == 0) { 660 ap_type = WMI_REG_INDOOR_AP; 661 reg_6ghz_number = reg_info->num_6ghz_rules_client 662 [ap_type][WMI_REG_DEFAULT_CLIENT]; 663 } 664 665 reg_rule_6ghz = reg_info->reg_rules_6ghz_client_ptr 666 [ap_type][WMI_REG_DEFAULT_CLIENT]; 667 max_bw_6ghz = reg_info->max_bw_6ghz_client 668 [ap_type][WMI_REG_DEFAULT_CLIENT]; 669 } else { 670 reg_6ghz_number = reg_info->num_6ghz_rules_ap[WMI_REG_INDOOR_AP]; 671 reg_rule_6ghz = 672 reg_info->reg_rules_6ghz_ap_ptr[WMI_REG_INDOOR_AP]; 673 max_bw_6ghz = reg_info->max_bw_6ghz_ap[WMI_REG_INDOOR_AP]; 674 } 675 676 num_rules += reg_6ghz_number; 677 } 678 679 if (!num_rules) 680 goto ret; 681 682 /* Add max additional rules to accommodate weather radar band */ 683 if (reg_info->dfs_region == ATH11K_DFS_REG_ETSI) 684 num_rules += 2; 685 686 tmp_regd = kzalloc(sizeof(*tmp_regd) + 687 (num_rules * sizeof(struct ieee80211_reg_rule)), 688 GFP_ATOMIC); 689 if (!tmp_regd) 690 goto ret; 691 692 memcpy(tmp_regd->alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1); 693 memcpy(alpha2, reg_info->alpha2, REG_ALPHA2_LEN + 1); 694 alpha2[2] = '\0'; 695 tmp_regd->dfs_region = ath11k_map_fw_dfs_region(reg_info->dfs_region); 696 697 ath11k_dbg(ab, ATH11K_DBG_REG, 698 "Country %s, CFG Regdomain %s FW Regdomain %d, num_reg_rules %d\n", 699 alpha2, ath11k_reg_get_regdom_str(tmp_regd->dfs_region), 700 reg_info->dfs_region, num_rules); 701 /* Update reg_rules[] below. Firmware is expected to 702 * send these rules in order(2 GHz rules first and then 5 GHz) 703 */ 704 for (; i < num_rules; i++) { 705 if (reg_info->num_2ghz_reg_rules && 706 (i < reg_info->num_2ghz_reg_rules)) { 707 reg_rule = reg_info->reg_rules_2ghz_ptr + i; 708 max_bw = min_t(u16, reg_rule->max_bw, 709 reg_info->max_bw_2ghz); 710 flags = 0; 711 } else if (reg_info->num_5ghz_reg_rules && 712 (j < reg_info->num_5ghz_reg_rules)) { 713 reg_rule = reg_info->reg_rules_5ghz_ptr + j++; 714 max_bw = min_t(u16, reg_rule->max_bw, 715 reg_info->max_bw_5ghz); 716 717 /* FW doesn't pass NL80211_RRF_AUTO_BW flag for 718 * BW Auto correction, we can enable this by default 719 * for all 5G rules here. The regulatory core performs 720 * BW correction if required and applies flags as 721 * per other BW rule flags we pass from here 722 */ 723 flags = NL80211_RRF_AUTO_BW; 724 } else if (reg_info->is_ext_reg_event && reg_6ghz_number && 725 k < reg_6ghz_number) { 726 reg_rule = reg_rule_6ghz + k++; 727 max_bw = min_t(u16, reg_rule->max_bw, max_bw_6ghz); 728 flags = NL80211_RRF_AUTO_BW; 729 if (reg_rule->psd_flag) 730 flags |= NL80211_RRF_PSD; 731 } else { 732 break; 733 } 734 735 flags |= ath11k_map_fw_reg_flags(reg_rule->flags); 736 flags |= ath11k_map_fw_phy_flags(reg_info->phybitmap); 737 738 ath11k_reg_update_rule(tmp_regd->reg_rules + i, 739 reg_rule->start_freq, 740 reg_rule->end_freq, max_bw, 741 reg_rule->ant_gain, reg_rule->reg_power, 742 reg_rule->psd_eirp, flags); 743 744 /* Update dfs cac timeout if the dfs domain is ETSI and the 745 * new rule covers weather radar band. 746 * Default value of '0' corresponds to 60s timeout, so no 747 * need to update that for other rules. 748 */ 749 if (flags & NL80211_RRF_DFS && 750 reg_info->dfs_region == ATH11K_DFS_REG_ETSI && 751 (reg_rule->end_freq > ETSI_WEATHER_RADAR_BAND_LOW && 752 reg_rule->start_freq < ETSI_WEATHER_RADAR_BAND_HIGH)){ 753 ath11k_reg_update_weather_radar_band(ab, tmp_regd, 754 reg_rule, &i, 755 flags, max_bw); 756 continue; 757 } 758 759 if (reg_info->is_ext_reg_event) { 760 ath11k_dbg(ab, ATH11K_DBG_REG, 761 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d) (%d, %d)\n", 762 i + 1, reg_rule->start_freq, reg_rule->end_freq, 763 max_bw, reg_rule->ant_gain, reg_rule->reg_power, 764 tmp_regd->reg_rules[i].dfs_cac_ms, flags, 765 reg_rule->psd_flag, reg_rule->psd_eirp); 766 } else { 767 ath11k_dbg(ab, ATH11K_DBG_REG, 768 "\t%d. (%d - %d @ %d) (%d, %d) (%d ms) (FLAGS %d)\n", 769 i + 1, reg_rule->start_freq, reg_rule->end_freq, 770 max_bw, reg_rule->ant_gain, reg_rule->reg_power, 771 tmp_regd->reg_rules[i].dfs_cac_ms, 772 flags); 773 } 774 } 775 776 tmp_regd->n_reg_rules = i; 777 778 if (intersect) { 779 default_regd = ab->default_regd[reg_info->phy_id]; 780 781 /* Get a new regd by intersecting the received regd with 782 * our default regd. 783 */ 784 new_regd = ath11k_regd_intersect(default_regd, tmp_regd); 785 kfree(tmp_regd); 786 if (!new_regd) { 787 ath11k_warn(ab, "Unable to create intersected regdomain\n"); 788 goto ret; 789 } 790 } else { 791 new_regd = tmp_regd; 792 } 793 794 ret: 795 return new_regd; 796 } 797 798 void ath11k_regd_update_chan_list_work(struct work_struct *work) 799 { 800 struct ath11k *ar = container_of(work, struct ath11k, 801 channel_update_work); 802 struct scan_chan_list_params *params; 803 struct list_head local_update_list; 804 int left; 805 806 INIT_LIST_HEAD(&local_update_list); 807 808 spin_lock_bh(&ar->data_lock); 809 list_splice_tail_init(&ar->channel_update_queue, &local_update_list); 810 spin_unlock_bh(&ar->data_lock); 811 812 while ((params = list_first_entry_or_null(&local_update_list, 813 struct scan_chan_list_params, 814 list))) { 815 if (ar->state_11d != ATH11K_11D_IDLE) { 816 left = wait_for_completion_timeout(&ar->completed_11d_scan, 817 ATH11K_SCAN_TIMEOUT_HZ); 818 if (!left) { 819 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 820 "failed to receive 11d scan complete: timed out\n"); 821 ar->state_11d = ATH11K_11D_IDLE; 822 } 823 824 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 825 "reg 11d scan wait left time %d\n", left); 826 } 827 828 if ((ar->scan.state == ATH11K_SCAN_STARTING || 829 ar->scan.state == ATH11K_SCAN_RUNNING)) { 830 left = wait_for_completion_timeout(&ar->scan.completed, 831 ATH11K_SCAN_TIMEOUT_HZ); 832 if (!left) 833 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 834 "failed to receive hw scan complete: timed out\n"); 835 836 ath11k_dbg(ar->ab, ATH11K_DBG_REG, 837 "reg hw scan wait left time %d\n", left); 838 } 839 840 ath11k_wmi_send_scan_chan_list_cmd(ar, params); 841 list_del(¶ms->list); 842 kfree(params); 843 } 844 } 845 846 static bool ath11k_reg_is_world_alpha(char *alpha) 847 { 848 if (alpha[0] == '0' && alpha[1] == '0') 849 return true; 850 851 if (alpha[0] == 'n' && alpha[1] == 'a') 852 return true; 853 854 return false; 855 } 856 857 static enum wmi_vdev_type ath11k_reg_get_ar_vdev_type(struct ath11k *ar) 858 { 859 struct ath11k_vif *arvif; 860 861 /* Currently each struct ath11k maps to one struct ieee80211_hw/wiphy 862 * and one struct ieee80211_regdomain, so it could only store one group 863 * reg rules. It means multi-interface concurrency in the same ath11k is 864 * not support for the regdomain. So get the vdev type of the first entry 865 * now. After concurrency support for the regdomain, this should change. 866 */ 867 arvif = list_first_entry_or_null(&ar->arvifs, struct ath11k_vif, list); 868 if (arvif) 869 return arvif->vdev_type; 870 871 return WMI_VDEV_TYPE_UNSPEC; 872 } 873 874 int ath11k_reg_handle_chan_list(struct ath11k_base *ab, 875 struct cur_regulatory_info *reg_info, 876 enum ieee80211_ap_reg_power power_type) 877 { 878 struct ieee80211_regdomain *regd; 879 bool intersect = false; 880 int pdev_idx; 881 struct ath11k *ar; 882 enum wmi_vdev_type vdev_type; 883 884 ath11k_dbg(ab, ATH11K_DBG_WMI, "event reg handle chan list"); 885 886 if (reg_info->status_code != REG_SET_CC_STATUS_PASS) { 887 /* In case of failure to set the requested ctry, 888 * fw retains the current regd. We print a failure info 889 * and return from here. 890 */ 891 ath11k_warn(ab, "Failed to set the requested Country regulatory setting\n"); 892 return -EINVAL; 893 } 894 895 pdev_idx = reg_info->phy_id; 896 897 /* Avoid default reg rule updates sent during FW recovery if 898 * it is already available 899 */ 900 spin_lock_bh(&ab->base_lock); 901 if (test_bit(ATH11K_FLAG_RECOVERY, &ab->dev_flags) && 902 ab->default_regd[pdev_idx]) { 903 spin_unlock_bh(&ab->base_lock); 904 goto retfail; 905 } 906 spin_unlock_bh(&ab->base_lock); 907 908 if (pdev_idx >= ab->num_radios) { 909 /* Process the event for phy0 only if single_pdev_only 910 * is true. If pdev_idx is valid but not 0, discard the 911 * event. Otherwise, it goes to fallback. In either case 912 * ath11k_reg_reset_info() needs to be called to avoid 913 * memory leak issue. 914 */ 915 ath11k_reg_reset_info(reg_info); 916 917 if (ab->hw_params.single_pdev_only && 918 pdev_idx < ab->hw_params.num_rxdma_per_pdev) 919 return 0; 920 goto fallback; 921 } 922 923 /* Avoid multiple overwrites to default regd, during core 924 * stop-start after mac registration. 925 */ 926 if (ab->default_regd[pdev_idx] && !ab->new_regd[pdev_idx] && 927 !memcmp((char *)ab->default_regd[pdev_idx]->alpha2, 928 (char *)reg_info->alpha2, 2) && 929 power_type == IEEE80211_REG_UNSET_AP) { 930 ath11k_reg_reset_info(reg_info); 931 return 0; 932 } 933 934 /* Intersect new rules with default regd if a new country setting was 935 * requested, i.e a default regd was already set during initialization 936 * and the regd coming from this event has a valid country info. 937 */ 938 if (ab->default_regd[pdev_idx] && 939 !ath11k_reg_is_world_alpha((char *) 940 ab->default_regd[pdev_idx]->alpha2) && 941 !ath11k_reg_is_world_alpha((char *)reg_info->alpha2)) 942 intersect = true; 943 944 ar = ab->pdevs[pdev_idx].ar; 945 vdev_type = ath11k_reg_get_ar_vdev_type(ar); 946 947 ath11k_dbg(ab, ATH11K_DBG_WMI, 948 "wmi handle chan list power type %d vdev type %d intersect %d\n", 949 power_type, vdev_type, intersect); 950 951 regd = ath11k_reg_build_regd(ab, reg_info, intersect, vdev_type, power_type); 952 if (!regd) { 953 ath11k_warn(ab, "failed to build regd from reg_info\n"); 954 goto fallback; 955 } 956 957 if (power_type == IEEE80211_REG_UNSET_AP) { 958 ath11k_reg_reset_info(&ab->reg_info_store[pdev_idx]); 959 ab->reg_info_store[pdev_idx] = *reg_info; 960 } 961 962 spin_lock_bh(&ab->base_lock); 963 if (ab->default_regd[pdev_idx]) { 964 /* The initial rules from FW after WMI Init is to build 965 * the default regd. From then on, any rules updated for 966 * the pdev could be due to user reg changes. 967 * Free previously built regd before assigning the newly 968 * generated regd to ar. NULL pointer handling will be 969 * taken care by kfree itself. 970 */ 971 ar = ab->pdevs[pdev_idx].ar; 972 kfree(ab->new_regd[pdev_idx]); 973 ab->new_regd[pdev_idx] = regd; 974 queue_work(ab->workqueue, &ar->regd_update_work); 975 } else { 976 /* This regd would be applied during mac registration and is 977 * held constant throughout for regd intersection purpose 978 */ 979 ab->default_regd[pdev_idx] = regd; 980 } 981 ab->dfs_region = reg_info->dfs_region; 982 spin_unlock_bh(&ab->base_lock); 983 984 return 0; 985 986 fallback: 987 /* Fallback to older reg (by sending previous country setting 988 * again if fw has succeeded and we failed to process here. 989 * The Regdomain should be uniform across driver and fw. Since the 990 * FW has processed the command and sent a success status, we expect 991 * this function to succeed as well. If it doesn't, CTRY needs to be 992 * reverted at the fw and the old SCAN_CHAN_LIST cmd needs to be sent. 993 */ 994 /* TODO: This is rare, but still should also be handled */ 995 WARN_ON(1); 996 997 retfail: 998 999 return -EINVAL; 1000 } 1001 1002 void ath11k_regd_update_work(struct work_struct *work) 1003 { 1004 struct ath11k *ar = container_of(work, struct ath11k, 1005 regd_update_work); 1006 int ret; 1007 1008 ret = ath11k_regd_update(ar); 1009 if (ret) { 1010 /* Firmware has already moved to the new regd. We need 1011 * to maintain channel consistency across FW, Host driver 1012 * and userspace. Hence as a fallback mechanism we can set 1013 * the prev or default country code to the firmware. 1014 */ 1015 /* TODO: Implement Fallback Mechanism */ 1016 } 1017 } 1018 1019 void ath11k_reg_init(struct ath11k *ar) 1020 { 1021 ar->hw->wiphy->regulatory_flags = REGULATORY_WIPHY_SELF_MANAGED; 1022 ar->hw->wiphy->flags |= WIPHY_FLAG_NOTIFY_REGDOM_BY_DRIVER; 1023 ar->hw->wiphy->reg_notifier = ath11k_reg_notifier; 1024 } 1025 1026 void ath11k_reg_reset_info(struct cur_regulatory_info *reg_info) 1027 { 1028 int i, j; 1029 1030 if (!reg_info) 1031 return; 1032 1033 kfree(reg_info->reg_rules_2ghz_ptr); 1034 kfree(reg_info->reg_rules_5ghz_ptr); 1035 1036 for (i = 0; i < WMI_REG_CURRENT_MAX_AP_TYPE; i++) { 1037 kfree(reg_info->reg_rules_6ghz_ap_ptr[i]); 1038 1039 for (j = 0; j < WMI_REG_MAX_CLIENT_TYPE; j++) 1040 kfree(reg_info->reg_rules_6ghz_client_ptr[i][j]); 1041 } 1042 1043 memset(reg_info, 0, sizeof(*reg_info)); 1044 } 1045 1046 void ath11k_reg_free(struct ath11k_base *ab) 1047 { 1048 int i; 1049 1050 for (i = 0; i < ab->num_radios; i++) 1051 ath11k_reg_reset_info(&ab->reg_info_store[i]); 1052 1053 kfree(ab->reg_info_store); 1054 ab->reg_info_store = NULL; 1055 1056 for (i = 0; i < ab->hw_params.max_radios; i++) { 1057 kfree(ab->default_regd[i]); 1058 kfree(ab->new_regd[i]); 1059 } 1060 } 1061 1062 int ath11k_reg_set_cc(struct ath11k *ar) 1063 { 1064 struct wmi_set_current_country_params set_current_param = {}; 1065 1066 memcpy(&set_current_param.alpha2, ar->alpha2, 2); 1067 return ath11k_wmi_send_set_current_country_cmd(ar, &set_current_param); 1068 } 1069