1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2024-2025 Intel Corporation 4 */ 5 #include <net/cfg80211.h> 6 7 #include "iface.h" 8 #include "hcmd.h" 9 #include "key.h" 10 #include "mlo.h" 11 #include "mac80211.h" 12 13 #include "fw/api/context.h" 14 #include "fw/api/mac.h" 15 #include "fw/api/time-event.h" 16 #include "fw/api/datapath.h" 17 18 /* Cleanup function for struct iwl_mld_vif, will be called in restart */ 19 void iwl_mld_cleanup_vif(void *data, u8 *mac, struct ieee80211_vif *vif) 20 { 21 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 22 struct iwl_mld *mld = mld_vif->mld; 23 struct iwl_mld_link *link; 24 25 mld_vif->emlsr.blocked_reasons &= ~IWL_MLD_EMLSR_BLOCKED_ROC; 26 27 if (mld_vif->aux_sta.sta_id != IWL_INVALID_STA) 28 iwl_mld_free_internal_sta(mld, &mld_vif->aux_sta); 29 30 /* EMLSR is turned back on during recovery */ 31 vif->driver_flags &= ~IEEE80211_VIF_EML_ACTIVE; 32 33 if (mld_vif->roc_activity != ROC_NUM_ACTIVITIES) 34 ieee80211_remain_on_channel_expired(mld->hw); 35 36 mld_vif->roc_activity = ROC_NUM_ACTIVITIES; 37 38 for_each_mld_vif_valid_link(mld_vif, link) { 39 iwl_mld_cleanup_link(mld_vif->mld, link); 40 41 /* Correctly allocated primary link in non-MLO mode */ 42 if (!ieee80211_vif_is_mld(vif) && 43 link_id == 0 && link == &mld_vif->deflink) 44 continue; 45 46 if (vif->active_links & BIT(link_id)) 47 continue; 48 49 /* Should not happen as link removal should always succeed */ 50 WARN_ON(1); 51 if (link != &mld_vif->deflink) 52 kfree_rcu(link, rcu_head); 53 RCU_INIT_POINTER(mld_vif->link[link_id], NULL); 54 } 55 56 ieee80211_iter_keys(mld->hw, vif, iwl_mld_cleanup_keys_iter, NULL); 57 58 CLEANUP_STRUCT(mld_vif); 59 } 60 61 static int iwl_mld_send_mac_cmd(struct iwl_mld *mld, 62 struct iwl_mac_config_cmd *cmd) 63 { 64 int ret; 65 66 lockdep_assert_wiphy(mld->wiphy); 67 68 ret = iwl_mld_send_cmd_pdu(mld, 69 WIDE_ID(MAC_CONF_GROUP, MAC_CONFIG_CMD), 70 cmd); 71 if (ret) 72 IWL_ERR(mld, "Failed to send MAC_CONFIG_CMD ret = %d\n", ret); 73 74 return ret; 75 } 76 77 int iwl_mld_mac80211_iftype_to_fw(const struct ieee80211_vif *vif) 78 { 79 switch (vif->type) { 80 case NL80211_IFTYPE_STATION: 81 return vif->p2p ? FW_MAC_TYPE_P2P_STA : FW_MAC_TYPE_BSS_STA; 82 case NL80211_IFTYPE_AP: 83 return FW_MAC_TYPE_GO; 84 case NL80211_IFTYPE_MONITOR: 85 return FW_MAC_TYPE_LISTENER; 86 case NL80211_IFTYPE_P2P_DEVICE: 87 return FW_MAC_TYPE_P2P_DEVICE; 88 case NL80211_IFTYPE_ADHOC: 89 return FW_MAC_TYPE_IBSS; 90 default: 91 WARN_ON_ONCE(1); 92 } 93 return FW_MAC_TYPE_BSS_STA; 94 } 95 96 static bool iwl_mld_is_nic_ack_enabled(struct iwl_mld *mld, 97 struct ieee80211_vif *vif) 98 { 99 const struct ieee80211_supported_band *sband; 100 const struct ieee80211_sta_he_cap *own_he_cap; 101 102 lockdep_assert_wiphy(mld->wiphy); 103 104 /* This capability is the same for all bands, 105 * so take it from one of them. 106 */ 107 sband = mld->hw->wiphy->bands[NL80211_BAND_2GHZ]; 108 own_he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); 109 110 return own_he_cap && (own_he_cap->he_cap_elem.mac_cap_info[2] & 111 IEEE80211_HE_MAC_CAP2_ACK_EN); 112 } 113 114 static void iwl_mld_set_he_support(struct iwl_mld *mld, 115 struct ieee80211_vif *vif, 116 struct iwl_mac_config_cmd *cmd, 117 int cmd_ver) 118 { 119 if (vif->type == NL80211_IFTYPE_AP) { 120 if (cmd_ver == 2) 121 cmd->wifi_gen_v2.he_ap_support = cpu_to_le16(1); 122 else 123 cmd->wifi_gen.he_ap_support = 1; 124 } else { 125 if (cmd_ver == 2) 126 cmd->wifi_gen_v2.he_support = cpu_to_le16(1); 127 else 128 cmd->wifi_gen.he_support = 1; 129 } 130 } 131 132 /* fill the common part for all interface types */ 133 static void iwl_mld_mac_cmd_fill_common(struct iwl_mld *mld, 134 struct ieee80211_vif *vif, 135 struct iwl_mac_config_cmd *cmd, 136 u32 action) 137 { 138 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 139 struct ieee80211_bss_conf *link_conf; 140 unsigned int link_id; 141 int cmd_ver = iwl_fw_lookup_cmd_ver(mld->fw, 142 WIDE_ID(MAC_CONF_GROUP, 143 MAC_CONFIG_CMD), 0); 144 145 lockdep_assert_wiphy(mld->wiphy); 146 147 cmd->id_and_color = cpu_to_le32(mld_vif->fw_id); 148 cmd->action = cpu_to_le32(action); 149 150 cmd->mac_type = 151 cpu_to_le32(iwl_mld_mac80211_iftype_to_fw(vif)); 152 153 memcpy(cmd->local_mld_addr, vif->addr, ETH_ALEN); 154 155 if (iwlwifi_mod_params.disable_11ax) 156 return; 157 158 cmd->nic_not_ack_enabled = 159 cpu_to_le32(!iwl_mld_is_nic_ack_enabled(mld, vif)); 160 161 /* If we have MLO enabled, then the firmware needs to enable 162 * address translation for the station(s) we add. That depends 163 * on having EHT enabled in firmware, which in turn depends on 164 * mac80211 in the code below. 165 * However, mac80211 doesn't enable HE/EHT until it has parsed 166 * the association response successfully, so just skip all that 167 * and enable both when we have MLO. 168 */ 169 if (ieee80211_vif_is_mld(vif)) { 170 iwl_mld_set_he_support(mld, vif, cmd, cmd_ver); 171 if (cmd_ver == 2) 172 cmd->wifi_gen_v2.eht_support = cpu_to_le32(1); 173 else 174 cmd->wifi_gen.eht_support = 1; 175 return; 176 } 177 178 for_each_vif_active_link(vif, link_conf, link_id) { 179 if (!link_conf->he_support) 180 continue; 181 182 iwl_mld_set_he_support(mld, vif, cmd, cmd_ver); 183 184 /* EHT, if supported, was already set above */ 185 break; 186 } 187 } 188 189 static void iwl_mld_fill_mac_cmd_sta(struct iwl_mld *mld, 190 struct ieee80211_vif *vif, u32 action, 191 struct iwl_mac_config_cmd *cmd) 192 { 193 struct ieee80211_bss_conf *link; 194 u32 twt_policy = 0; 195 int link_id; 196 197 lockdep_assert_wiphy(mld->wiphy); 198 199 WARN_ON(vif->type != NL80211_IFTYPE_STATION); 200 201 /* We always want to hear MCAST frames, if we're not authorized yet, 202 * we'll drop them. 203 */ 204 cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_GRP); 205 206 /* Adding a MAC ctxt with is_assoc set is not allowed in fw 207 * (and shouldn't happen) 208 */ 209 if (vif->cfg.assoc && action != FW_CTXT_ACTION_ADD) { 210 cmd->client.is_assoc = 1; 211 212 if (!iwl_mld_vif_from_mac80211(vif)->authorized) 213 cmd->client.data_policy |= 214 cpu_to_le16(COEX_HIGH_PRIORITY_ENABLE); 215 } else { 216 /* Allow beacons to pass through as long as we are not 217 * associated 218 */ 219 cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON); 220 } 221 222 cmd->client.assoc_id = cpu_to_le16(vif->cfg.aid); 223 224 if (ieee80211_vif_is_mld(vif)) { 225 u16 esr_transition_timeout = 226 u16_get_bits(vif->cfg.eml_cap, 227 IEEE80211_EML_CAP_TRANSITION_TIMEOUT); 228 229 cmd->client.esr_transition_timeout = 230 min_t(u16, IEEE80211_EML_CAP_TRANSITION_TIMEOUT_128TU, 231 esr_transition_timeout); 232 cmd->client.medium_sync_delay = 233 cpu_to_le16(vif->cfg.eml_med_sync_delay); 234 } 235 236 for_each_vif_active_link(vif, link, link_id) { 237 if (!link->he_support) 238 continue; 239 240 if (link->twt_requester) 241 twt_policy |= TWT_SUPPORTED; 242 if (link->twt_protected) 243 twt_policy |= PROTECTED_TWT_SUPPORTED; 244 if (link->twt_broadcast) 245 twt_policy |= BROADCAST_TWT_SUPPORTED; 246 } 247 248 if (!iwlwifi_mod_params.disable_11ax) 249 cmd->client.data_policy |= cpu_to_le16(twt_policy); 250 251 if (vif->probe_req_reg && vif->cfg.assoc && vif->p2p) 252 cmd->filter_flags |= 253 cpu_to_le32(MAC_CFG_FILTER_ACCEPT_PROBE_REQ); 254 } 255 256 static void iwl_mld_fill_mac_cmd_ap(struct iwl_mld *mld, 257 struct ieee80211_vif *vif, 258 struct iwl_mac_config_cmd *cmd) 259 { 260 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 261 262 lockdep_assert_wiphy(mld->wiphy); 263 264 WARN_ON(vif->type != NL80211_IFTYPE_AP); 265 266 cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_PROBE_REQ); 267 268 /* in AP mode, pass beacons from other APs (needed for ht protection). 269 * When there're no any associated station, which means that we are not 270 * TXing anyway, don't ask FW to pass beacons to prevent unnecessary 271 * wake-ups. 272 */ 273 if (mld_vif->num_associated_stas) 274 cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON); 275 } 276 277 static void iwl_mld_go_iterator(void *_data, u8 *mac, struct ieee80211_vif *vif) 278 { 279 bool *go_active = _data; 280 281 if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO && 282 iwl_mld_vif_from_mac80211(vif)->ap_ibss_active) 283 *go_active = true; 284 } 285 286 static bool iwl_mld_p2p_dev_has_extended_disc(struct iwl_mld *mld) 287 { 288 bool go_active = false; 289 290 /* This flag should be set to true when the P2P Device is 291 * discoverable and there is at least a P2P GO. Setting 292 * this flag will allow the P2P Device to be discoverable on other 293 * channels in addition to its listen channel. 294 * Note that this flag should not be set in other cases as it opens the 295 * Rx filters on all MAC and increases the number of interrupts. 296 */ 297 ieee80211_iterate_active_interfaces(mld->hw, 298 IEEE80211_IFACE_ITER_RESUME_ALL, 299 iwl_mld_go_iterator, &go_active); 300 301 return go_active; 302 } 303 304 static void iwl_mld_fill_mac_cmd_p2p_dev(struct iwl_mld *mld, 305 struct ieee80211_vif *vif, 306 struct iwl_mac_config_cmd *cmd) 307 { 308 bool ext_disc = iwl_mld_p2p_dev_has_extended_disc(mld); 309 310 lockdep_assert_wiphy(mld->wiphy); 311 312 /* Override the filter flags to accept all management frames. This is 313 * needed to support both P2P device discovery using probe requests and 314 * P2P service discovery using action frames 315 */ 316 cmd->filter_flags = cpu_to_le32(MAC_CFG_FILTER_ACCEPT_CONTROL_AND_MGMT); 317 318 if (ext_disc) 319 cmd->p2p_dev.is_disc_extended = cpu_to_le32(1); 320 } 321 322 static void iwl_mld_fill_mac_cmd_ibss(struct iwl_mld *mld, 323 struct ieee80211_vif *vif, 324 struct iwl_mac_config_cmd *cmd) 325 { 326 lockdep_assert_wiphy(mld->wiphy); 327 328 WARN_ON(vif->type != NL80211_IFTYPE_ADHOC); 329 330 cmd->filter_flags |= cpu_to_le32(MAC_CFG_FILTER_ACCEPT_BEACON | 331 MAC_CFG_FILTER_ACCEPT_PROBE_REQ | 332 MAC_CFG_FILTER_ACCEPT_GRP); 333 } 334 335 static int 336 iwl_mld_rm_mac_from_fw(struct iwl_mld *mld, struct ieee80211_vif *vif) 337 { 338 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 339 struct iwl_mac_config_cmd cmd = { 340 .action = cpu_to_le32(FW_CTXT_ACTION_REMOVE), 341 .id_and_color = cpu_to_le32(mld_vif->fw_id), 342 }; 343 344 return iwl_mld_send_mac_cmd(mld, &cmd); 345 } 346 347 int iwl_mld_mac_fw_action(struct iwl_mld *mld, struct ieee80211_vif *vif, 348 u32 action) 349 { 350 struct iwl_mac_config_cmd cmd = {}; 351 352 lockdep_assert_wiphy(mld->wiphy); 353 354 if (action == FW_CTXT_ACTION_REMOVE) 355 return iwl_mld_rm_mac_from_fw(mld, vif); 356 357 iwl_mld_mac_cmd_fill_common(mld, vif, &cmd, action); 358 359 switch (vif->type) { 360 case NL80211_IFTYPE_STATION: 361 iwl_mld_fill_mac_cmd_sta(mld, vif, action, &cmd); 362 break; 363 case NL80211_IFTYPE_AP: 364 iwl_mld_fill_mac_cmd_ap(mld, vif, &cmd); 365 break; 366 case NL80211_IFTYPE_MONITOR: 367 cmd.filter_flags = 368 cpu_to_le32(MAC_CFG_FILTER_PROMISC | 369 MAC_CFG_FILTER_ACCEPT_CONTROL_AND_MGMT | 370 MAC_CFG_FILTER_ACCEPT_BEACON | 371 MAC_CFG_FILTER_ACCEPT_PROBE_REQ | 372 MAC_CFG_FILTER_ACCEPT_GRP); 373 break; 374 case NL80211_IFTYPE_P2P_DEVICE: 375 iwl_mld_fill_mac_cmd_p2p_dev(mld, vif, &cmd); 376 break; 377 case NL80211_IFTYPE_ADHOC: 378 iwl_mld_fill_mac_cmd_ibss(mld, vif, &cmd); 379 break; 380 default: 381 WARN(1, "not supported yet\n"); 382 return -EOPNOTSUPP; 383 } 384 385 return iwl_mld_send_mac_cmd(mld, &cmd); 386 } 387 388 IWL_MLD_ALLOC_FN(vif, vif) 389 390 /* Constructor function for struct iwl_mld_vif */ 391 static int 392 iwl_mld_init_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) 393 { 394 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 395 int ret; 396 397 lockdep_assert_wiphy(mld->wiphy); 398 399 mld_vif->mld = mld; 400 mld_vif->roc_activity = ROC_NUM_ACTIVITIES; 401 402 ret = iwl_mld_allocate_vif_fw_id(mld, &mld_vif->fw_id, vif); 403 if (ret) 404 return ret; 405 406 if (!mld->fw_status.in_hw_restart) { 407 wiphy_work_init(&mld_vif->emlsr.unblock_tpt_wk, 408 iwl_mld_emlsr_unblock_tpt_wk); 409 wiphy_delayed_work_init(&mld_vif->emlsr.check_tpt_wk, 410 iwl_mld_emlsr_check_tpt); 411 wiphy_delayed_work_init(&mld_vif->emlsr.prevent_done_wk, 412 iwl_mld_emlsr_prevent_done_wk); 413 wiphy_delayed_work_init(&mld_vif->emlsr.tmp_non_bss_done_wk, 414 iwl_mld_emlsr_tmp_non_bss_done_wk); 415 } 416 iwl_mld_init_internal_sta(&mld_vif->aux_sta); 417 418 return 0; 419 } 420 421 int iwl_mld_add_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) 422 { 423 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 424 int ret; 425 426 lockdep_assert_wiphy(mld->wiphy); 427 428 ret = iwl_mld_init_vif(mld, vif); 429 if (ret) 430 return ret; 431 432 ret = iwl_mld_mac_fw_action(mld, vif, FW_CTXT_ACTION_ADD); 433 if (ret) 434 RCU_INIT_POINTER(mld->fw_id_to_vif[mld_vif->fw_id], NULL); 435 436 return ret; 437 } 438 439 int iwl_mld_rm_vif(struct iwl_mld *mld, struct ieee80211_vif *vif) 440 { 441 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 442 int ret; 443 444 lockdep_assert_wiphy(mld->wiphy); 445 446 ret = iwl_mld_mac_fw_action(mld, vif, FW_CTXT_ACTION_REMOVE); 447 448 if (WARN_ON(mld_vif->fw_id >= ARRAY_SIZE(mld->fw_id_to_vif))) 449 return -EINVAL; 450 451 RCU_INIT_POINTER(mld->fw_id_to_vif[mld_vif->fw_id], NULL); 452 453 iwl_mld_cancel_notifications_of_object(mld, IWL_MLD_OBJECT_TYPE_VIF, 454 mld_vif->fw_id); 455 456 return ret; 457 } 458 459 void iwl_mld_set_vif_associated(struct iwl_mld *mld, 460 struct ieee80211_vif *vif) 461 { 462 struct ieee80211_bss_conf *link; 463 unsigned int link_id; 464 465 for_each_vif_active_link(vif, link, link_id) { 466 if (iwl_mld_link_set_associated(mld, vif, link)) 467 IWL_ERR(mld, "failed to update link %d\n", link_id); 468 } 469 470 iwl_mld_recalc_multicast_filter(mld); 471 } 472 473 static void iwl_mld_get_fw_id_bss_bitmap_iter(void *_data, u8 *mac, 474 struct ieee80211_vif *vif) 475 { 476 u8 *fw_id_bitmap = _data; 477 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 478 479 if (ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_STATION) 480 return; 481 482 *fw_id_bitmap |= BIT(mld_vif->fw_id); 483 } 484 485 u8 iwl_mld_get_fw_bss_vifs_ids(struct iwl_mld *mld) 486 { 487 u8 fw_id_bitmap = 0; 488 489 ieee80211_iterate_active_interfaces_mtx(mld->hw, 490 IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER, 491 iwl_mld_get_fw_id_bss_bitmap_iter, 492 &fw_id_bitmap); 493 494 return fw_id_bitmap; 495 } 496 497 void iwl_mld_handle_probe_resp_data_notif(struct iwl_mld *mld, 498 struct iwl_rx_packet *pkt) 499 { 500 const struct iwl_probe_resp_data_notif *notif = (void *)pkt->data; 501 struct iwl_probe_resp_data *old_data, *new_data; 502 struct ieee80211_vif *vif; 503 struct iwl_mld_link *mld_link; 504 505 IWL_DEBUG_INFO(mld, "Probe response data notif: noa %d, csa %d\n", 506 notif->noa_active, notif->csa_counter); 507 508 if (IWL_FW_CHECK(mld, le32_to_cpu(notif->mac_id) >= 509 ARRAY_SIZE(mld->fw_id_to_vif), 510 "mac id is invalid: %d\n", 511 le32_to_cpu(notif->mac_id))) 512 return; 513 514 vif = wiphy_dereference(mld->wiphy, 515 mld->fw_id_to_vif[le32_to_cpu(notif->mac_id)]); 516 517 /* the firmware gives us the mac_id (and not the link_id), mac80211 518 * gets a vif and not a link, bottom line, this flow is not MLD ready 519 * yet. 520 */ 521 if (WARN_ON(!vif) || ieee80211_vif_is_mld(vif)) 522 return; 523 524 if (notif->csa_counter != IWL_PROBE_RESP_DATA_NO_CSA && 525 notif->csa_counter >= 1) 526 ieee80211_beacon_set_cntdwn(vif, notif->csa_counter); 527 528 if (!vif->p2p) 529 return; 530 531 mld_link = &iwl_mld_vif_from_mac80211(vif)->deflink; 532 533 new_data = kzalloc(sizeof(*new_data), GFP_KERNEL); 534 if (!new_data) 535 return; 536 537 memcpy(&new_data->notif, notif, sizeof(new_data->notif)); 538 539 /* noa_attr contains 1 reserved byte, need to substruct it */ 540 new_data->noa_len = sizeof(struct ieee80211_vendor_ie) + 541 sizeof(new_data->notif.noa_attr) - 1; 542 543 /* 544 * If it's a one time NoA, only one descriptor is needed, 545 * adjust the length according to len_low. 546 */ 547 if (new_data->notif.noa_attr.len_low == 548 sizeof(struct ieee80211_p2p_noa_desc) + 2) 549 new_data->noa_len -= sizeof(struct ieee80211_p2p_noa_desc); 550 551 old_data = wiphy_dereference(mld->wiphy, mld_link->probe_resp_data); 552 rcu_assign_pointer(mld_link->probe_resp_data, new_data); 553 554 if (old_data) 555 kfree_rcu(old_data, rcu_head); 556 } 557 558 void iwl_mld_handle_uapsd_misbehaving_ap_notif(struct iwl_mld *mld, 559 struct iwl_rx_packet *pkt) 560 { 561 struct iwl_uapsd_misbehaving_ap_notif *notif = (void *)pkt->data; 562 struct ieee80211_vif *vif; 563 564 if (IWL_FW_CHECK(mld, notif->mac_id >= ARRAY_SIZE(mld->fw_id_to_vif), 565 "mac id is invalid: %d\n", notif->mac_id)) 566 return; 567 568 vif = wiphy_dereference(mld->wiphy, mld->fw_id_to_vif[notif->mac_id]); 569 570 if (WARN_ON(!vif) || ieee80211_vif_is_mld(vif)) 571 return; 572 573 IWL_WARN(mld, "uapsd misbehaving AP: %pM\n", vif->bss_conf.bssid); 574 } 575 576 void iwl_mld_handle_datapath_monitor_notif(struct iwl_mld *mld, 577 struct iwl_rx_packet *pkt) 578 { 579 struct iwl_datapath_monitor_notif *notif = (void *)pkt->data; 580 struct ieee80211_bss_conf *link; 581 struct ieee80211_supported_band *sband; 582 const struct ieee80211_sta_he_cap *he_cap; 583 struct ieee80211_vif *vif; 584 struct iwl_mld_vif *mld_vif; 585 586 if (notif->type != cpu_to_le32(IWL_DP_MON_NOTIF_TYPE_EXT_CCA)) 587 return; 588 589 link = iwl_mld_fw_id_to_link_conf(mld, notif->link_id); 590 if (WARN_ON(!link)) 591 return; 592 593 vif = link->vif; 594 if (WARN_ON(!vif) || vif->type != NL80211_IFTYPE_STATION || 595 !vif->cfg.assoc) 596 return; 597 598 if (!link->chanreq.oper.chan || 599 link->chanreq.oper.chan->band != NL80211_BAND_2GHZ || 600 link->chanreq.oper.width < NL80211_CHAN_WIDTH_40) 601 return; 602 603 mld_vif = iwl_mld_vif_from_mac80211(vif); 604 605 /* this shouldn't happen *again*, ignore it */ 606 if (mld_vif->cca_40mhz_workaround != CCA_40_MHZ_WA_NONE) 607 return; 608 609 mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_RECONNECT; 610 611 /* 612 * This capability manipulation isn't really ideal, but it's the 613 * easiest choice - otherwise we'd have to do some major changes 614 * in mac80211 to support this, which isn't worth it. This does 615 * mean that userspace may have outdated information, but that's 616 * actually not an issue at all. 617 */ 618 sband = mld->wiphy->bands[NL80211_BAND_2GHZ]; 619 620 WARN_ON(!sband->ht_cap.ht_supported); 621 WARN_ON(!(sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)); 622 sband->ht_cap.cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 623 624 he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); 625 626 if (he_cap) { 627 /* we know that ours is writable */ 628 struct ieee80211_sta_he_cap *he = (void *)(uintptr_t)he_cap; 629 630 WARN_ON(!he->has_he); 631 WARN_ON(!(he->he_cap_elem.phy_cap_info[0] & 632 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)); 633 he->he_cap_elem.phy_cap_info[0] &= 634 ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 635 } 636 637 ieee80211_disconnect(vif, true); 638 } 639 640 void iwl_mld_reset_cca_40mhz_workaround(struct iwl_mld *mld, 641 struct ieee80211_vif *vif) 642 { 643 struct ieee80211_supported_band *sband; 644 const struct ieee80211_sta_he_cap *he_cap; 645 struct iwl_mld_vif *mld_vif = iwl_mld_vif_from_mac80211(vif); 646 647 if (vif->type != NL80211_IFTYPE_STATION) 648 return; 649 650 if (mld_vif->cca_40mhz_workaround == CCA_40_MHZ_WA_NONE) 651 return; 652 653 /* Now we are just reconnecting with the new capabilities, 654 * but remember to reset the capabilities when we disconnect for real 655 */ 656 if (mld_vif->cca_40mhz_workaround == CCA_40_MHZ_WA_RECONNECT) { 657 mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_RESET; 658 return; 659 } 660 661 /* Now cca_40mhz_workaround == CCA_40_MHZ_WA_RESET */ 662 663 sband = mld->wiphy->bands[NL80211_BAND_2GHZ]; 664 665 sband->ht_cap.cap |= IEEE80211_HT_CAP_SUP_WIDTH_20_40; 666 667 he_cap = ieee80211_get_he_iftype_cap_vif(sband, vif); 668 669 if (he_cap) { 670 /* we know that ours is writable */ 671 struct ieee80211_sta_he_cap *he = (void *)(uintptr_t)he_cap; 672 673 he->he_cap_elem.phy_cap_info[0] |= 674 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; 675 } 676 677 mld_vif->cca_40mhz_workaround = CCA_40_MHZ_WA_NONE; 678 } 679 680 struct ieee80211_vif *iwl_mld_get_bss_vif(struct iwl_mld *mld) 681 { 682 unsigned long fw_id_bitmap = iwl_mld_get_fw_bss_vifs_ids(mld); 683 int fw_id; 684 685 if (hweight8(fw_id_bitmap) != 1) 686 return NULL; 687 688 fw_id = __ffs(fw_id_bitmap); 689 690 return wiphy_dereference(mld->wiphy, 691 mld->fw_id_to_vif[fw_id]); 692 } 693