1 /* 2 * HT handling 3 * 4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> 5 * Copyright 2002-2005, Instant802 Networks, Inc. 6 * Copyright 2005-2006, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2007-2010, Intel Corporation 10 * Copyright 2017 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License version 2 as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/ieee80211.h> 18 #include <linux/export.h> 19 #include <net/mac80211.h> 20 #include "ieee80211_i.h" 21 #include "rate.h" 22 23 static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, 24 struct ieee80211_ht_cap *ht_capa_mask, 25 struct ieee80211_sta_ht_cap *ht_cap, 26 u16 flag) 27 { 28 __le16 le_flag = cpu_to_le16(flag); 29 if (ht_capa_mask->cap_info & le_flag) { 30 if (!(ht_capa->cap_info & le_flag)) 31 ht_cap->cap &= ~flag; 32 } 33 } 34 35 static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, 36 struct ieee80211_ht_cap *ht_capa_mask, 37 struct ieee80211_sta_ht_cap *ht_cap, 38 u16 flag) 39 { 40 __le16 le_flag = cpu_to_le16(flag); 41 42 if ((ht_capa_mask->cap_info & le_flag) && 43 (ht_capa->cap_info & le_flag)) 44 ht_cap->cap |= flag; 45 } 46 47 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, 48 struct ieee80211_sta_ht_cap *ht_cap) 49 { 50 struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; 51 u8 *scaps, *smask; 52 int i; 53 54 if (!ht_cap->ht_supported) 55 return; 56 57 switch (sdata->vif.type) { 58 case NL80211_IFTYPE_STATION: 59 ht_capa = &sdata->u.mgd.ht_capa; 60 ht_capa_mask = &sdata->u.mgd.ht_capa_mask; 61 break; 62 case NL80211_IFTYPE_ADHOC: 63 ht_capa = &sdata->u.ibss.ht_capa; 64 ht_capa_mask = &sdata->u.ibss.ht_capa_mask; 65 break; 66 default: 67 WARN_ON_ONCE(1); 68 return; 69 } 70 71 scaps = (u8 *)(&ht_capa->mcs.rx_mask); 72 smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); 73 74 /* NOTE: If you add more over-rides here, update register_hw 75 * ht_capa_mod_mask logic in main.c as well. 76 * And, if this method can ever change ht_cap.ht_supported, fix 77 * the check in ieee80211_add_ht_ie. 78 */ 79 80 /* check for HT over-rides, MCS rates first. */ 81 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 82 u8 m = smask[i]; 83 ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ 84 /* Add back rates that are supported */ 85 ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); 86 } 87 88 /* Force removal of HT-40 capabilities? */ 89 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 90 IEEE80211_HT_CAP_SUP_WIDTH_20_40); 91 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 92 IEEE80211_HT_CAP_SGI_40); 93 94 /* Allow user to disable SGI-20 (SGI-40 is handled above) */ 95 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 96 IEEE80211_HT_CAP_SGI_20); 97 98 /* Allow user to disable the max-AMSDU bit. */ 99 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 100 IEEE80211_HT_CAP_MAX_AMSDU); 101 102 /* Allow user to disable LDPC */ 103 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, 104 IEEE80211_HT_CAP_LDPC_CODING); 105 106 /* Allow user to enable 40 MHz intolerant bit. */ 107 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, 108 IEEE80211_HT_CAP_40MHZ_INTOLERANT); 109 110 /* Allow user to enable TX STBC bit */ 111 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, 112 IEEE80211_HT_CAP_TX_STBC); 113 114 /* Allow user to configure RX STBC bits */ 115 if (ht_capa_mask->cap_info & cpu_to_le16(IEEE80211_HT_CAP_RX_STBC)) 116 ht_cap->cap |= le16_to_cpu(ht_capa->cap_info) & 117 IEEE80211_HT_CAP_RX_STBC; 118 119 /* Allow user to decrease AMPDU factor */ 120 if (ht_capa_mask->ampdu_params_info & 121 IEEE80211_HT_AMPDU_PARM_FACTOR) { 122 u8 n = ht_capa->ampdu_params_info & 123 IEEE80211_HT_AMPDU_PARM_FACTOR; 124 if (n < ht_cap->ampdu_factor) 125 ht_cap->ampdu_factor = n; 126 } 127 128 /* Allow the user to increase AMPDU density. */ 129 if (ht_capa_mask->ampdu_params_info & 130 IEEE80211_HT_AMPDU_PARM_DENSITY) { 131 u8 n = (ht_capa->ampdu_params_info & 132 IEEE80211_HT_AMPDU_PARM_DENSITY) 133 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; 134 if (n > ht_cap->ampdu_density) 135 ht_cap->ampdu_density = n; 136 } 137 } 138 139 140 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, 141 struct ieee80211_supported_band *sband, 142 const struct ieee80211_ht_cap *ht_cap_ie, 143 struct sta_info *sta) 144 { 145 struct ieee80211_sta_ht_cap ht_cap, own_cap; 146 u8 ampdu_info, tx_mcs_set_cap; 147 int i, max_tx_streams; 148 bool changed; 149 enum ieee80211_sta_rx_bandwidth bw; 150 enum ieee80211_smps_mode smps_mode; 151 152 memset(&ht_cap, 0, sizeof(ht_cap)); 153 154 if (!ht_cap_ie || !sband->ht_cap.ht_supported) 155 goto apply; 156 157 ht_cap.ht_supported = true; 158 159 own_cap = sband->ht_cap; 160 161 /* 162 * If user has specified capability over-rides, take care 163 * of that if the station we're setting up is the AP or TDLS peer that 164 * we advertised a restricted capability set to. Override 165 * our own capabilities and then use those below. 166 */ 167 if (sdata->vif.type == NL80211_IFTYPE_STATION || 168 sdata->vif.type == NL80211_IFTYPE_ADHOC) 169 ieee80211_apply_htcap_overrides(sdata, &own_cap); 170 171 /* 172 * The bits listed in this expression should be 173 * the same for the peer and us, if the station 174 * advertises more then we can't use those thus 175 * we mask them out. 176 */ 177 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & 178 (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | 179 IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 180 IEEE80211_HT_CAP_GRN_FLD | 181 IEEE80211_HT_CAP_SGI_20 | 182 IEEE80211_HT_CAP_SGI_40 | 183 IEEE80211_HT_CAP_DSSSCCK40)); 184 185 /* 186 * The STBC bits are asymmetric -- if we don't have 187 * TX then mask out the peer's RX and vice versa. 188 */ 189 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) 190 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; 191 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) 192 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; 193 194 ampdu_info = ht_cap_ie->ampdu_params_info; 195 ht_cap.ampdu_factor = 196 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; 197 ht_cap.ampdu_density = 198 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; 199 200 /* own MCS TX capabilities */ 201 tx_mcs_set_cap = own_cap.mcs.tx_params; 202 203 /* Copy peer MCS TX capabilities, the driver might need them. */ 204 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; 205 206 /* can we TX with MCS rates? */ 207 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) 208 goto apply; 209 210 /* Counting from 0, therefore +1 */ 211 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) 212 max_tx_streams = 213 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) 214 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; 215 else 216 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; 217 218 /* 219 * 802.11n-2009 20.3.5 / 20.6 says: 220 * - indices 0 to 7 and 32 are single spatial stream 221 * - 8 to 31 are multiple spatial streams using equal modulation 222 * [8..15 for two streams, 16..23 for three and 24..31 for four] 223 * - remainder are multiple spatial streams using unequal modulation 224 */ 225 for (i = 0; i < max_tx_streams; i++) 226 ht_cap.mcs.rx_mask[i] = 227 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; 228 229 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) 230 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; 231 i < IEEE80211_HT_MCS_MASK_LEN; i++) 232 ht_cap.mcs.rx_mask[i] = 233 own_cap.mcs.rx_mask[i] & 234 ht_cap_ie->mcs.rx_mask[i]; 235 236 /* handle MCS rate 32 too */ 237 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) 238 ht_cap.mcs.rx_mask[32/8] |= 1; 239 240 /* set Rx highest rate */ 241 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest; 242 243 if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU) 244 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935; 245 else 246 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839; 247 248 apply: 249 changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); 250 251 memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); 252 253 switch (sdata->vif.bss_conf.chandef.width) { 254 default: 255 WARN_ON_ONCE(1); 256 /* fall through */ 257 case NL80211_CHAN_WIDTH_20_NOHT: 258 case NL80211_CHAN_WIDTH_20: 259 bw = IEEE80211_STA_RX_BW_20; 260 break; 261 case NL80211_CHAN_WIDTH_40: 262 case NL80211_CHAN_WIDTH_80: 263 case NL80211_CHAN_WIDTH_80P80: 264 case NL80211_CHAN_WIDTH_160: 265 bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 266 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; 267 break; 268 } 269 270 sta->sta.bandwidth = bw; 271 272 sta->cur_max_bandwidth = 273 ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 274 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; 275 276 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) 277 >> IEEE80211_HT_CAP_SM_PS_SHIFT) { 278 case WLAN_HT_CAP_SM_PS_INVALID: 279 case WLAN_HT_CAP_SM_PS_STATIC: 280 smps_mode = IEEE80211_SMPS_STATIC; 281 break; 282 case WLAN_HT_CAP_SM_PS_DYNAMIC: 283 smps_mode = IEEE80211_SMPS_DYNAMIC; 284 break; 285 case WLAN_HT_CAP_SM_PS_DISABLED: 286 smps_mode = IEEE80211_SMPS_OFF; 287 break; 288 } 289 290 if (smps_mode != sta->sta.smps_mode) 291 changed = true; 292 sta->sta.smps_mode = smps_mode; 293 294 return changed; 295 } 296 297 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, 298 enum ieee80211_agg_stop_reason reason) 299 { 300 int i; 301 302 mutex_lock(&sta->ampdu_mlme.mtx); 303 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 304 ___ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, 305 WLAN_REASON_QSTA_LEAVE_QBSS, 306 reason != AGG_STOP_DESTROY_STA && 307 reason != AGG_STOP_PEER_REQUEST); 308 309 for (i = 0; i < IEEE80211_NUM_TIDS; i++) 310 ___ieee80211_stop_tx_ba_session(sta, i, reason); 311 mutex_unlock(&sta->ampdu_mlme.mtx); 312 313 /* 314 * In case the tear down is part of a reconfigure due to HW restart 315 * request, it is possible that the low level driver requested to stop 316 * the BA session, so handle it to properly clean tid_tx data. 317 */ 318 if(reason == AGG_STOP_DESTROY_STA) { 319 cancel_work_sync(&sta->ampdu_mlme.work); 320 321 mutex_lock(&sta->ampdu_mlme.mtx); 322 for (i = 0; i < IEEE80211_NUM_TIDS; i++) { 323 struct tid_ampdu_tx *tid_tx = 324 rcu_dereference_protected_tid_tx(sta, i); 325 326 if (!tid_tx) 327 continue; 328 329 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) 330 ieee80211_stop_tx_ba_cb(sta, i, tid_tx); 331 } 332 mutex_unlock(&sta->ampdu_mlme.mtx); 333 } 334 } 335 336 void ieee80211_ba_session_work(struct work_struct *work) 337 { 338 struct sta_info *sta = 339 container_of(work, struct sta_info, ampdu_mlme.work); 340 struct tid_ampdu_tx *tid_tx; 341 bool blocked; 342 int tid; 343 344 /* When this flag is set, new sessions should be blocked. */ 345 blocked = test_sta_flag(sta, WLAN_STA_BLOCK_BA); 346 347 mutex_lock(&sta->ampdu_mlme.mtx); 348 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { 349 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) 350 ___ieee80211_stop_rx_ba_session( 351 sta, tid, WLAN_BACK_RECIPIENT, 352 WLAN_REASON_QSTA_TIMEOUT, true); 353 354 if (test_and_clear_bit(tid, 355 sta->ampdu_mlme.tid_rx_stop_requested)) 356 ___ieee80211_stop_rx_ba_session( 357 sta, tid, WLAN_BACK_RECIPIENT, 358 WLAN_REASON_UNSPECIFIED, true); 359 360 if (!blocked && 361 test_and_clear_bit(tid, 362 sta->ampdu_mlme.tid_rx_manage_offl)) 363 ___ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid, 364 IEEE80211_MAX_AMPDU_BUF_HT, 365 false, true); 366 367 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS, 368 sta->ampdu_mlme.tid_rx_manage_offl)) 369 ___ieee80211_stop_rx_ba_session( 370 sta, tid, WLAN_BACK_RECIPIENT, 371 0, false); 372 373 spin_lock_bh(&sta->lock); 374 375 tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; 376 if (!blocked && tid_tx) { 377 /* 378 * Assign it over to the normal tid_tx array 379 * where it "goes live". 380 */ 381 382 sta->ampdu_mlme.tid_start_tx[tid] = NULL; 383 /* could there be a race? */ 384 if (sta->ampdu_mlme.tid_tx[tid]) 385 kfree(tid_tx); 386 else 387 ieee80211_assign_tid_tx(sta, tid, tid_tx); 388 spin_unlock_bh(&sta->lock); 389 390 ieee80211_tx_ba_session_handle_start(sta, tid); 391 continue; 392 } 393 spin_unlock_bh(&sta->lock); 394 395 tid_tx = rcu_dereference_protected_tid_tx(sta, tid); 396 if (!tid_tx) 397 continue; 398 399 if (!blocked && 400 test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state)) 401 ieee80211_start_tx_ba_cb(sta, tid, tid_tx); 402 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state)) 403 ___ieee80211_stop_tx_ba_session(sta, tid, 404 AGG_STOP_LOCAL_REQUEST); 405 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) 406 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx); 407 } 408 mutex_unlock(&sta->ampdu_mlme.mtx); 409 } 410 411 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, 412 const u8 *da, u16 tid, 413 u16 initiator, u16 reason_code) 414 { 415 struct ieee80211_local *local = sdata->local; 416 struct sk_buff *skb; 417 struct ieee80211_mgmt *mgmt; 418 u16 params; 419 420 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); 421 if (!skb) 422 return; 423 424 skb_reserve(skb, local->hw.extra_tx_headroom); 425 mgmt = skb_put_zero(skb, 24); 426 memcpy(mgmt->da, da, ETH_ALEN); 427 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 428 if (sdata->vif.type == NL80211_IFTYPE_AP || 429 sdata->vif.type == NL80211_IFTYPE_AP_VLAN || 430 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) 431 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); 432 else if (sdata->vif.type == NL80211_IFTYPE_STATION) 433 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); 434 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) 435 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); 436 437 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 438 IEEE80211_STYPE_ACTION); 439 440 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); 441 442 mgmt->u.action.category = WLAN_CATEGORY_BACK; 443 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; 444 params = (u16)(initiator << 11); /* bit 11 initiator */ 445 params |= (u16)(tid << 12); /* bit 15:12 TID number */ 446 447 mgmt->u.action.u.delba.params = cpu_to_le16(params); 448 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); 449 450 ieee80211_tx_skb(sdata, skb); 451 } 452 453 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, 454 struct sta_info *sta, 455 struct ieee80211_mgmt *mgmt, size_t len) 456 { 457 u16 tid, params; 458 u16 initiator; 459 460 params = le16_to_cpu(mgmt->u.action.u.delba.params); 461 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; 462 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; 463 464 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", 465 mgmt->sa, initiator ? "initiator" : "recipient", 466 tid, 467 le16_to_cpu(mgmt->u.action.u.delba.reason_code)); 468 469 if (initiator == WLAN_BACK_INITIATOR) 470 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, 471 true); 472 else 473 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); 474 } 475 476 enum nl80211_smps_mode 477 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps) 478 { 479 switch (smps) { 480 case IEEE80211_SMPS_OFF: 481 return NL80211_SMPS_OFF; 482 case IEEE80211_SMPS_STATIC: 483 return NL80211_SMPS_STATIC; 484 case IEEE80211_SMPS_DYNAMIC: 485 return NL80211_SMPS_DYNAMIC; 486 default: 487 return NL80211_SMPS_OFF; 488 } 489 } 490 491 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, 492 enum ieee80211_smps_mode smps, const u8 *da, 493 const u8 *bssid) 494 { 495 struct ieee80211_local *local = sdata->local; 496 struct sk_buff *skb; 497 struct ieee80211_mgmt *action_frame; 498 499 /* 27 = header + category + action + smps mode */ 500 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); 501 if (!skb) 502 return -ENOMEM; 503 504 skb_reserve(skb, local->hw.extra_tx_headroom); 505 action_frame = skb_put(skb, 27); 506 memcpy(action_frame->da, da, ETH_ALEN); 507 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); 508 memcpy(action_frame->bssid, bssid, ETH_ALEN); 509 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 510 IEEE80211_STYPE_ACTION); 511 action_frame->u.action.category = WLAN_CATEGORY_HT; 512 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; 513 switch (smps) { 514 case IEEE80211_SMPS_AUTOMATIC: 515 case IEEE80211_SMPS_NUM_MODES: 516 WARN_ON(1); 517 /* fall through */ 518 case IEEE80211_SMPS_OFF: 519 action_frame->u.action.u.ht_smps.smps_control = 520 WLAN_HT_SMPS_CONTROL_DISABLED; 521 break; 522 case IEEE80211_SMPS_STATIC: 523 action_frame->u.action.u.ht_smps.smps_control = 524 WLAN_HT_SMPS_CONTROL_STATIC; 525 break; 526 case IEEE80211_SMPS_DYNAMIC: 527 action_frame->u.action.u.ht_smps.smps_control = 528 WLAN_HT_SMPS_CONTROL_DYNAMIC; 529 break; 530 } 531 532 /* we'll do more on status of this frame */ 533 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 534 ieee80211_tx_skb(sdata, skb); 535 536 return 0; 537 } 538 539 void ieee80211_request_smps_mgd_work(struct work_struct *work) 540 { 541 struct ieee80211_sub_if_data *sdata = 542 container_of(work, struct ieee80211_sub_if_data, 543 u.mgd.request_smps_work); 544 545 sdata_lock(sdata); 546 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode); 547 sdata_unlock(sdata); 548 } 549 550 void ieee80211_request_smps_ap_work(struct work_struct *work) 551 { 552 struct ieee80211_sub_if_data *sdata = 553 container_of(work, struct ieee80211_sub_if_data, 554 u.ap.request_smps_work); 555 556 sdata_lock(sdata); 557 if (sdata_dereference(sdata->u.ap.beacon, sdata)) 558 __ieee80211_request_smps_ap(sdata, 559 sdata->u.ap.driver_smps_mode); 560 sdata_unlock(sdata); 561 } 562 563 void ieee80211_request_smps(struct ieee80211_vif *vif, 564 enum ieee80211_smps_mode smps_mode) 565 { 566 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 567 568 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION && 569 vif->type != NL80211_IFTYPE_AP)) 570 return; 571 572 if (vif->type == NL80211_IFTYPE_STATION) { 573 if (sdata->u.mgd.driver_smps_mode == smps_mode) 574 return; 575 sdata->u.mgd.driver_smps_mode = smps_mode; 576 ieee80211_queue_work(&sdata->local->hw, 577 &sdata->u.mgd.request_smps_work); 578 } else { 579 /* AUTOMATIC is meaningless in AP mode */ 580 if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC)) 581 return; 582 if (sdata->u.ap.driver_smps_mode == smps_mode) 583 return; 584 sdata->u.ap.driver_smps_mode = smps_mode; 585 ieee80211_queue_work(&sdata->local->hw, 586 &sdata->u.ap.request_smps_work); 587 } 588 } 589 /* this might change ... don't want non-open drivers using it */ 590 EXPORT_SYMBOL_GPL(ieee80211_request_smps); 591