1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * HT handling 4 * 5 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> 6 * Copyright 2002-2005, Instant802 Networks, Inc. 7 * Copyright 2005-2006, Devicescape Software, Inc. 8 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 9 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 10 * Copyright 2007-2010, Intel Corporation 11 * Copyright 2017 Intel Deutschland GmbH 12 * Copyright(c) 2020-2026 Intel Corporation 13 */ 14 15 #include <linux/ieee80211.h> 16 #include <linux/export.h> 17 #include <net/mac80211.h> 18 #include "ieee80211_i.h" 19 #include "rate.h" 20 21 static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, 22 struct ieee80211_ht_cap *ht_capa_mask, 23 struct ieee80211_sta_ht_cap *ht_cap, 24 u16 flag) 25 { 26 __le16 le_flag = cpu_to_le16(flag); 27 if (ht_capa_mask->cap_info & le_flag) { 28 if (!(ht_capa->cap_info & le_flag)) 29 ht_cap->cap &= ~flag; 30 } 31 } 32 33 static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, 34 struct ieee80211_ht_cap *ht_capa_mask, 35 struct ieee80211_sta_ht_cap *ht_cap, 36 u16 flag) 37 { 38 __le16 le_flag = cpu_to_le16(flag); 39 40 if ((ht_capa_mask->cap_info & le_flag) && 41 (ht_capa->cap_info & le_flag)) 42 ht_cap->cap |= flag; 43 } 44 45 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, 46 struct ieee80211_sta_ht_cap *ht_cap) 47 { 48 struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; 49 u8 *scaps, *smask; 50 int i; 51 52 if (!ht_cap->ht_supported) 53 return; 54 55 switch (sdata->vif.type) { 56 case NL80211_IFTYPE_STATION: 57 ht_capa = &sdata->u.mgd.ht_capa; 58 ht_capa_mask = &sdata->u.mgd.ht_capa_mask; 59 break; 60 case NL80211_IFTYPE_ADHOC: 61 ht_capa = &sdata->u.ibss.ht_capa; 62 ht_capa_mask = &sdata->u.ibss.ht_capa_mask; 63 break; 64 default: 65 WARN_ON_ONCE(1); 66 return; 67 } 68 69 scaps = (u8 *)(&ht_capa->mcs.rx_mask); 70 smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); 71 72 /* NOTE: If you add more over-rides here, update register_hw 73 * ht_capa_mod_mask logic in main.c as well. 74 * And, if this method can ever change ht_cap.ht_supported, fix 75 * the check in ieee80211_add_ht_ie. 76 */ 77 78 /* check for HT over-rides, MCS rates first. */ 79 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 80 u8 m = smask[i]; 81 ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ 82 /* Add back rates that are supported */ 83 ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); 84 } 85 86 /* Force removal of HT-40 capabilities? */ 87 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 88 IEEE80211_HT_CAP_SUP_WIDTH_20_40); 89 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 90 IEEE80211_HT_CAP_SGI_40); 91 92 /* Allow user to disable SGI-20 (SGI-40 is handled above) */ 93 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 94 IEEE80211_HT_CAP_SGI_20); 95 96 /* Allow user to disable the max-AMSDU bit. */ 97 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 98 IEEE80211_HT_CAP_MAX_AMSDU); 99 100 /* Allow user to disable LDPC */ 101 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 102 IEEE80211_HT_CAP_LDPC_CODING); 103 104 /* Allow user to enable 40 MHz intolerant bit. */ 105 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, 106 IEEE80211_HT_CAP_40MHZ_INTOLERANT); 107 108 /* Allow user to enable TX STBC bit */ 109 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, 110 IEEE80211_HT_CAP_TX_STBC); 111 112 /* Allow user to configure RX STBC bits */ 113 if (ht_capa_mask->cap_info & cpu_to_le16(IEEE80211_HT_CAP_RX_STBC)) 114 ht_cap->cap |= le16_to_cpu(ht_capa->cap_info) & 115 IEEE80211_HT_CAP_RX_STBC; 116 117 /* Allow user to decrease AMPDU factor */ 118 if (ht_capa_mask->ampdu_params_info & 119 IEEE80211_HT_AMPDU_PARM_FACTOR) { 120 u8 n = ht_capa->ampdu_params_info & 121 IEEE80211_HT_AMPDU_PARM_FACTOR; 122 if (n < ht_cap->ampdu_factor) 123 ht_cap->ampdu_factor = n; 124 } 125 126 /* Allow the user to increase AMPDU density. */ 127 if (ht_capa_mask->ampdu_params_info & 128 IEEE80211_HT_AMPDU_PARM_DENSITY) { 129 u8 n = (ht_capa->ampdu_params_info & 130 IEEE80211_HT_AMPDU_PARM_DENSITY) 131 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; 132 if (n > ht_cap->ampdu_density) 133 ht_cap->ampdu_density = n; 134 } 135 } 136 137 138 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, 139 const struct ieee80211_sta_ht_cap *own_cap_ptr, 140 const struct ieee80211_ht_cap *ht_cap_ie, 141 struct link_sta_info *link_sta) 142 { 143 struct sta_info *sta = link_sta->sta; 144 struct ieee80211_sta_ht_cap ht_cap, own_cap; 145 u8 ampdu_info, tx_mcs_set_cap; 146 int i, max_tx_streams; 147 bool changed; 148 149 memset(&ht_cap, 0, sizeof(ht_cap)); 150 151 if (!ht_cap_ie || !own_cap_ptr->ht_supported) 152 goto apply; 153 154 /* NDI station are using the capabilities from the NMI station */ 155 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_NAN_DATA)) 156 return 0; 157 158 ht_cap.ht_supported = true; 159 160 own_cap = *own_cap_ptr; 161 162 /* 163 * If user has specified capability over-rides, take care 164 * of that if the station we're setting up is the AP or TDLS peer that 165 * we advertised a restricted capability set to. Override 166 * our own capabilities and then use those below. 167 */ 168 if (sdata->vif.type == NL80211_IFTYPE_STATION || 169 sdata->vif.type == NL80211_IFTYPE_ADHOC) 170 ieee80211_apply_htcap_overrides(sdata, &own_cap); 171 172 /* 173 * The bits listed in this expression should be 174 * the same for the peer and us, if the station 175 * advertises more then we can't use those thus 176 * we mask them out. 177 */ 178 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & 179 (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | 180 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 181 IEEE80211_HT_CAP_GRN_FLD | 182 IEEE80211_HT_CAP_SGI_20 | 183 IEEE80211_HT_CAP_SGI_40 | 184 IEEE80211_HT_CAP_DSSSCCK40)); 185 186 /* 187 * The STBC bits are asymmetric -- if we don't have 188 * TX then mask out the peer's RX and vice versa. 189 */ 190 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) 191 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; 192 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) 193 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; 194 195 ampdu_info = ht_cap_ie->ampdu_params_info; 196 ht_cap.ampdu_factor = 197 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; 198 ht_cap.ampdu_density = 199 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; 200 201 /* own MCS TX capabilities */ 202 tx_mcs_set_cap = own_cap.mcs.tx_params; 203 204 /* Copy peer MCS TX capabilities, the driver might need them. */ 205 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; 206 207 /* can we TX with MCS rates? */ 208 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) 209 goto apply; 210 211 /* Counting from 0, therefore +1 */ 212 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) 213 max_tx_streams = 214 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 215 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 216 else 217 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; 218 219 /* 220 * 802.11n-2009 20.3.5 / 20.6 says: 221 * - indices 0 to 7 and 32 are single spatial stream 222 * - 8 to 31 are multiple spatial streams using equal modulation 223 * [8..15 for two streams, 16..23 for three and 24..31 for four] 224 * - remainder are multiple spatial streams using unequal modulation 225 */ 226 for (i = 0; i < max_tx_streams; i++) 227 ht_cap.mcs.rx_mask[i] = 228 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; 229 230 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) 231 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; 232 i < IEEE80211_HT_MCS_MASK_LEN; i++) 233 ht_cap.mcs.rx_mask[i] = 234 own_cap.mcs.rx_mask[i] & 235 ht_cap_ie->mcs.rx_mask[i]; 236 237 /* handle MCS rate 32 too */ 238 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) 239 ht_cap.mcs.rx_mask[32/8] |= 1; 240 241 /* set Rx highest rate */ 242 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest; 243 244 if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU) 245 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935; 246 else 247 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839; 248 249 ieee80211_sta_recalc_aggregates(&sta->sta); 250 251 apply: 252 changed = memcmp(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap)); 253 254 memcpy(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap)); 255 256 if (sta->sdata->vif.type == NL80211_IFTYPE_AP || 257 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 258 sta->sdata->vif.type == NL80211_IFTYPE_NAN || 259 sta->sdata->vif.type == NL80211_IFTYPE_NAN_DATA) { 260 enum ieee80211_smps_mode smps_mode; 261 262 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) 263 >> IEEE80211_HT_CAP_SM_PS_SHIFT) { 264 case WLAN_HT_CAP_SM_PS_INVALID: 265 case WLAN_HT_CAP_SM_PS_STATIC: 266 smps_mode = IEEE80211_SMPS_STATIC; 267 break; 268 case WLAN_HT_CAP_SM_PS_DYNAMIC: 269 smps_mode = IEEE80211_SMPS_DYNAMIC; 270 break; 271 case WLAN_HT_CAP_SM_PS_DISABLED: 272 smps_mode = IEEE80211_SMPS_OFF; 273 break; 274 } 275 276 if (smps_mode != link_sta->pub->smps_mode) 277 changed = true; 278 link_sta->pub->smps_mode = smps_mode; 279 } else { 280 link_sta->pub->smps_mode = IEEE80211_SMPS_OFF; 281 } 282 283 return changed; 284 } 285 286 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, 287 enum ieee80211_agg_stop_reason reason) 288 { 289 int i; 290 291 lockdep_assert_wiphy(sta->local->hw.wiphy); 292 293 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 294 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, 295 WLAN_REASON_QSTA_LEAVE_QBSS, 296 reason != AGG_STOP_DESTROY_STA && 297 reason != AGG_STOP_PEER_REQUEST); 298 299 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 300 __ieee80211_stop_tx_ba_session(sta, i, reason); 301 302 /* 303 * In case the tear down is part of a reconfigure due to HW restart 304 * request, it is possible that the low level driver requested to stop 305 * the BA session, so handle it to properly clean tid_tx data. 306 */ 307 if(reason == AGG_STOP_DESTROY_STA) { 308 wiphy_work_cancel(sta->local->hw.wiphy, &sta->ampdu_mlme.work); 309 310 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 311 struct tid_ampdu_tx *tid_tx = 312 rcu_dereference_protected_tid_tx(sta, i); 313 314 if (!tid_tx) 315 continue; 316 317 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) 318 ieee80211_stop_tx_ba_cb(sta, i, tid_tx); 319 } 320 } 321 } 322 323 void ieee80211_ba_session_work(struct wiphy *wiphy, struct wiphy_work *work) 324 { 325 struct sta_info *sta = 326 container_of(work, struct sta_info, ampdu_mlme.work); 327 struct tid_ampdu_tx *tid_tx; 328 bool blocked; 329 int tid; 330 331 lockdep_assert_wiphy(sta->local->hw.wiphy); 332 333 /* When this flag is set, new sessions should be blocked. */ 334 blocked = test_sta_flag(sta, WLAN_STA_BLOCK_BA); 335 336 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { 337 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) 338 __ieee80211_stop_rx_ba_session( 339 sta, tid, WLAN_BACK_RECIPIENT, 340 WLAN_REASON_QSTA_TIMEOUT, true); 341 342 if (test_and_clear_bit(tid, 343 sta->ampdu_mlme.tid_rx_stop_requested)) 344 __ieee80211_stop_rx_ba_session( 345 sta, tid, WLAN_BACK_RECIPIENT, 346 WLAN_REASON_UNSPECIFIED, true); 347 348 if (!blocked && 349 test_and_clear_bit(tid, 350 sta->ampdu_mlme.tid_rx_manage_offl)) 351 __ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid, 352 IEEE80211_MAX_AMPDU_BUF_HT, 353 false, true, false, 0); 354 355 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS, 356 sta->ampdu_mlme.tid_rx_manage_offl)) 357 __ieee80211_stop_rx_ba_session( 358 sta, tid, WLAN_BACK_RECIPIENT, 359 0, false); 360 361 spin_lock_bh(&sta->lock); 362 363 tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; 364 if (!blocked && tid_tx) { 365 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]); 366 struct ieee80211_sub_if_data *sdata = 367 vif_to_sdata(txqi->txq.vif); 368 struct fq *fq = &sdata->local->fq; 369 370 spin_lock_bh(&fq->lock); 371 372 /* Allow only frags to be dequeued */ 373 set_bit(IEEE80211_TXQ_STOP, &txqi->flags); 374 375 if (!skb_queue_empty(&txqi->frags)) { 376 /* Fragmented Tx is ongoing, wait for it to 377 * finish. Reschedule worker to retry later. 378 */ 379 380 spin_unlock_bh(&fq->lock); 381 spin_unlock_bh(&sta->lock); 382 383 /* Give the task working on the txq a chance 384 * to send out the queued frags 385 */ 386 synchronize_net(); 387 388 wiphy_work_queue(sdata->local->hw.wiphy, work); 389 return; 390 } 391 392 spin_unlock_bh(&fq->lock); 393 394 /* 395 * Assign it over to the normal tid_tx array 396 * where it "goes live". 397 */ 398 399 sta->ampdu_mlme.tid_start_tx[tid] = NULL; 400 /* could there be a race? */ 401 if (sta->ampdu_mlme.tid_tx[tid]) 402 kfree(tid_tx); 403 else 404 ieee80211_assign_tid_tx(sta, tid, tid_tx); 405 spin_unlock_bh(&sta->lock); 406 407 ieee80211_tx_ba_session_handle_start(sta, tid); 408 continue; 409 } 410 spin_unlock_bh(&sta->lock); 411 412 tid_tx = rcu_dereference_protected_tid_tx(sta, tid); 413 if (!tid_tx) 414 continue; 415 416 if (!blocked && 417 test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state)) 418 ieee80211_start_tx_ba_cb(sta, tid, tid_tx); 419 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state)) 420 __ieee80211_stop_tx_ba_session(sta, tid, 421 AGG_STOP_LOCAL_REQUEST); 422 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) 423 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx); 424 } 425 } 426 427 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, 428 const u8 *da, u16 tid, 429 u16 initiator, u16 reason_code, 430 bool use_ndp) 431 { 432 struct ieee80211_local *local = sdata->local; 433 struct sk_buff *skb; 434 struct ieee80211_mgmt *mgmt; 435 u16 params; 436 437 skb = dev_alloc_skb(IEEE80211_MIN_ACTION_SIZE(delba) + 438 local->hw.extra_tx_headroom); 439 if (!skb) 440 return; 441 442 skb_reserve(skb, local->hw.extra_tx_headroom); 443 mgmt = ieee80211_mgmt_ba(skb, da, sdata); 444 445 skb_put(skb, 2 + sizeof(mgmt->u.action.delba)); 446 447 mgmt->u.action.category = WLAN_CATEGORY_BACK; 448 mgmt->u.action.action_code = use_ndp ? 449 WLAN_ACTION_NDP_DELBA : WLAN_ACTION_DELBA; 450 params = (u16)(initiator << 11); /* bit 11 initiator */ 451 params |= (u16)(tid << 12); /* bit 15:12 TID number */ 452 453 mgmt->u.action.delba.params = cpu_to_le16(params); 454 mgmt->u.action.delba.reason_code = cpu_to_le16(reason_code); 455 456 ieee80211_tx_skb(sdata, skb); 457 } 458 459 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, 460 struct sta_info *sta, 461 struct ieee80211_mgmt *mgmt, size_t len) 462 { 463 u16 tid, params; 464 u16 initiator; 465 466 params = le16_to_cpu(mgmt->u.action.delba.params); 467 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; 468 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; 469 470 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", 471 mgmt->sa, initiator ? "initiator" : "recipient", 472 tid, 473 le16_to_cpu(mgmt->u.action.delba.reason_code)); 474 475 if (initiator == WLAN_BACK_INITIATOR) 476 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, 477 true); 478 else 479 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); 480 } 481 482 enum nl80211_smps_mode 483 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps) 484 { 485 switch (smps) { 486 case IEEE80211_SMPS_OFF: 487 return NL80211_SMPS_OFF; 488 case IEEE80211_SMPS_STATIC: 489 return NL80211_SMPS_STATIC; 490 case IEEE80211_SMPS_DYNAMIC: 491 return NL80211_SMPS_DYNAMIC; 492 default: 493 return NL80211_SMPS_OFF; 494 } 495 } 496 497 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, 498 enum ieee80211_smps_mode smps, const u8 *da, 499 const u8 *bssid, int link_id) 500 { 501 struct ieee80211_local *local = sdata->local; 502 struct sk_buff *skb; 503 struct ieee80211_mgmt *action_frame; 504 struct ieee80211_tx_info *info; 505 u8 status_link_id = link_id < 0 ? 0 : link_id; 506 507 skb = dev_alloc_skb(IEEE80211_MIN_ACTION_SIZE(ht_smps) + 508 local->hw.extra_tx_headroom); 509 if (!skb) 510 return -ENOMEM; 511 512 skb_reserve(skb, local->hw.extra_tx_headroom); 513 action_frame = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ht_smps)); 514 memcpy(action_frame->da, da, ETH_ALEN); 515 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); 516 memcpy(action_frame->bssid, bssid, ETH_ALEN); 517 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 518 IEEE80211_STYPE_ACTION); 519 action_frame->u.action.category = WLAN_CATEGORY_HT; 520 action_frame->u.action.action_code = WLAN_HT_ACTION_SMPS; 521 switch (smps) { 522 case IEEE80211_SMPS_AUTOMATIC: 523 case IEEE80211_SMPS_NUM_MODES: 524 WARN_ON(1); 525 smps = IEEE80211_SMPS_OFF; 526 fallthrough; 527 case IEEE80211_SMPS_OFF: 528 action_frame->u.action.ht_smps.smps_control = 529 WLAN_HT_SMPS_CONTROL_DISABLED; 530 break; 531 case IEEE80211_SMPS_STATIC: 532 action_frame->u.action.ht_smps.smps_control = 533 WLAN_HT_SMPS_CONTROL_STATIC; 534 break; 535 case IEEE80211_SMPS_DYNAMIC: 536 action_frame->u.action.ht_smps.smps_control = 537 WLAN_HT_SMPS_CONTROL_DYNAMIC; 538 break; 539 } 540 541 /* we'll do more on status of this frame */ 542 info = IEEE80211_SKB_CB(skb); 543 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 544 /* we have 13 bits, and need 6: link_id 4, smps 2 */ 545 info->status_data = IEEE80211_STATUS_TYPE_SMPS | 546 u16_encode_bits(status_link_id << 2 | smps, 547 IEEE80211_STATUS_SUBDATA_MASK); 548 ieee80211_tx_skb_tid(sdata, skb, 7, link_id); 549 550 return 0; 551 } 552 553 void ieee80211_request_smps(struct ieee80211_vif *vif, unsigned int link_id, 554 enum ieee80211_smps_mode smps_mode) 555 { 556 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 557 struct ieee80211_link_data *link; 558 559 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION)) 560 return; 561 562 rcu_read_lock(); 563 link = rcu_dereference(sdata->link[link_id]); 564 if (WARN_ON(!link)) 565 goto out; 566 567 trace_api_request_smps(sdata->local, sdata, link, smps_mode); 568 569 if (link->u.mgd.driver_smps_mode == smps_mode) 570 goto out; 571 572 link->u.mgd.driver_smps_mode = smps_mode; 573 wiphy_work_queue(sdata->local->hw.wiphy, 574 &link->u.mgd.request_smps_work); 575 out: 576 rcu_read_unlock(); 577 } 578 /* this might change ... don't want non-open drivers using it */ 579 EXPORT_SYMBOL_GPL(ieee80211_request_smps); 580 581 void ieee80211_ht_handle_chanwidth_notif(struct ieee80211_local *local, 582 struct ieee80211_sub_if_data *sdata, 583 struct sta_info *sta, 584 struct link_sta_info *link_sta, 585 u8 chanwidth, enum nl80211_band band) 586 { 587 enum ieee80211_sta_rx_bandwidth max_bw, new_bw; 588 struct ieee80211_supported_band *sband; 589 struct sta_opmode_info sta_opmode = {}; 590 struct ieee80211_link_data *link; 591 592 lockdep_assert_wiphy(local->hw.wiphy); 593 594 link = sdata_dereference(sdata->link[link_sta->link_id], sdata); 595 if (WARN_ON(!link)) 596 return; 597 598 if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ) 599 max_bw = IEEE80211_STA_RX_BW_20; 600 else 601 max_bw = IEEE80211_STA_RX_BW_MAX; 602 603 /* set op_mode_bw and recalc sta bw */ 604 link_sta->op_mode_bw = max_bw; 605 new_bw = ieee80211_sta_current_bw(link_sta, &link->conf->chanreq.oper, 606 IEEE80211_STA_BW_TX_TO_STA); 607 608 if (link_sta->pub->bandwidth == new_bw) 609 return; 610 611 link_sta->pub->bandwidth = new_bw; 612 sband = local->hw.wiphy->bands[band]; 613 sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(new_bw); 614 sta_opmode.changed = STA_OPMODE_MAX_BW_CHANGED; 615 616 rate_control_rate_update(local, sband, link_sta, 617 IEEE80211_RC_BW_CHANGED); 618 cfg80211_sta_opmode_change_notify(sdata->dev, 619 sta->addr, 620 &sta_opmode, 621 GFP_KERNEL); 622 } 623