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(®d_copy->reg_rules[i], ®d_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 } 1026