Linux kernel mirror (for testing)
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linux
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
21static 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
33static 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
45void 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
138bool 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 ieee80211_bss_conf *link_conf;
144 struct sta_info *sta = link_sta->sta;
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 nl80211_chan_width width;
151
152 memset(&ht_cap, 0, sizeof(ht_cap));
153
154 if (!ht_cap_ie || !own_cap_ptr->ht_supported)
155 goto apply;
156
157 /* NDI station are using the capabilities from the NMI station */
158 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_NAN_DATA))
159 return 0;
160
161 ht_cap.ht_supported = true;
162
163 own_cap = *own_cap_ptr;
164
165 /*
166 * If user has specified capability over-rides, take care
167 * of that if the station we're setting up is the AP or TDLS peer that
168 * we advertised a restricted capability set to. Override
169 * our own capabilities and then use those below.
170 */
171 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
172 sdata->vif.type == NL80211_IFTYPE_ADHOC)
173 ieee80211_apply_htcap_overrides(sdata, &own_cap);
174
175 /*
176 * The bits listed in this expression should be
177 * the same for the peer and us, if the station
178 * advertises more then we can't use those thus
179 * we mask them out.
180 */
181 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
182 (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING |
183 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
184 IEEE80211_HT_CAP_GRN_FLD |
185 IEEE80211_HT_CAP_SGI_20 |
186 IEEE80211_HT_CAP_SGI_40 |
187 IEEE80211_HT_CAP_DSSSCCK40));
188
189 /*
190 * The STBC bits are asymmetric -- if we don't have
191 * TX then mask out the peer's RX and vice versa.
192 */
193 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
194 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
195 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
196 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
197
198 ampdu_info = ht_cap_ie->ampdu_params_info;
199 ht_cap.ampdu_factor =
200 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
201 ht_cap.ampdu_density =
202 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
203
204 /* own MCS TX capabilities */
205 tx_mcs_set_cap = own_cap.mcs.tx_params;
206
207 /* Copy peer MCS TX capabilities, the driver might need them. */
208 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
209
210 /* can we TX with MCS rates? */
211 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
212 goto apply;
213
214 /* Counting from 0, therefore +1 */
215 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
216 max_tx_streams =
217 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
218 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
219 else
220 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
221
222 /*
223 * 802.11n-2009 20.3.5 / 20.6 says:
224 * - indices 0 to 7 and 32 are single spatial stream
225 * - 8 to 31 are multiple spatial streams using equal modulation
226 * [8..15 for two streams, 16..23 for three and 24..31 for four]
227 * - remainder are multiple spatial streams using unequal modulation
228 */
229 for (i = 0; i < max_tx_streams; i++)
230 ht_cap.mcs.rx_mask[i] =
231 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
232
233 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
234 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
235 i < IEEE80211_HT_MCS_MASK_LEN; i++)
236 ht_cap.mcs.rx_mask[i] =
237 own_cap.mcs.rx_mask[i] &
238 ht_cap_ie->mcs.rx_mask[i];
239
240 /* handle MCS rate 32 too */
241 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
242 ht_cap.mcs.rx_mask[32/8] |= 1;
243
244 /* set Rx highest rate */
245 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest;
246
247 if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU)
248 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935;
249 else
250 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839;
251
252 ieee80211_sta_recalc_aggregates(&sta->sta);
253
254 apply:
255 changed = memcmp(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap));
256
257 memcpy(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap));
258
259 rcu_read_lock();
260 link_conf = rcu_dereference(sdata->vif.link_conf[link_sta->link_id]);
261 if (WARN_ON(!link_conf)) {
262 width = NL80211_CHAN_WIDTH_20_NOHT;
263 } else if (sdata->vif.type == NL80211_IFTYPE_NAN ||
264 sdata->vif.type == NL80211_IFTYPE_NAN_DATA) {
265 /* In NAN, link_sta->bandwidth is invalid since NAN operates on
266 * multiple channels. Just take the maximum.
267 */
268 width = NL80211_CHAN_WIDTH_320;
269 } else {
270 width = link_conf->chanreq.oper.width;
271 }
272
273 switch (width) {
274 default:
275 WARN_ON_ONCE(1);
276 fallthrough;
277 case NL80211_CHAN_WIDTH_20_NOHT:
278 case NL80211_CHAN_WIDTH_20:
279 bw = IEEE80211_STA_RX_BW_20;
280 break;
281 case NL80211_CHAN_WIDTH_40:
282 case NL80211_CHAN_WIDTH_80:
283 case NL80211_CHAN_WIDTH_80P80:
284 case NL80211_CHAN_WIDTH_160:
285 case NL80211_CHAN_WIDTH_320:
286 bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
287 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
288 break;
289 }
290 rcu_read_unlock();
291
292 link_sta->pub->bandwidth = bw;
293
294 link_sta->cur_max_bandwidth =
295 ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
296 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
297
298 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
299 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
300 sta->sdata->vif.type == NL80211_IFTYPE_NAN ||
301 sta->sdata->vif.type == NL80211_IFTYPE_NAN_DATA) {
302 enum ieee80211_smps_mode smps_mode;
303
304 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
305 >> IEEE80211_HT_CAP_SM_PS_SHIFT) {
306 case WLAN_HT_CAP_SM_PS_INVALID:
307 case WLAN_HT_CAP_SM_PS_STATIC:
308 smps_mode = IEEE80211_SMPS_STATIC;
309 break;
310 case WLAN_HT_CAP_SM_PS_DYNAMIC:
311 smps_mode = IEEE80211_SMPS_DYNAMIC;
312 break;
313 case WLAN_HT_CAP_SM_PS_DISABLED:
314 smps_mode = IEEE80211_SMPS_OFF;
315 break;
316 }
317
318 if (smps_mode != link_sta->pub->smps_mode)
319 changed = true;
320 link_sta->pub->smps_mode = smps_mode;
321 } else {
322 link_sta->pub->smps_mode = IEEE80211_SMPS_OFF;
323 }
324
325 return changed;
326}
327
328void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
329 enum ieee80211_agg_stop_reason reason)
330{
331 int i;
332
333 lockdep_assert_wiphy(sta->local->hw.wiphy);
334
335 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
336 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
337 WLAN_REASON_QSTA_LEAVE_QBSS,
338 reason != AGG_STOP_DESTROY_STA &&
339 reason != AGG_STOP_PEER_REQUEST);
340
341 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
342 __ieee80211_stop_tx_ba_session(sta, i, reason);
343
344 /*
345 * In case the tear down is part of a reconfigure due to HW restart
346 * request, it is possible that the low level driver requested to stop
347 * the BA session, so handle it to properly clean tid_tx data.
348 */
349 if(reason == AGG_STOP_DESTROY_STA) {
350 wiphy_work_cancel(sta->local->hw.wiphy, &sta->ampdu_mlme.work);
351
352 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
353 struct tid_ampdu_tx *tid_tx =
354 rcu_dereference_protected_tid_tx(sta, i);
355
356 if (!tid_tx)
357 continue;
358
359 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
360 ieee80211_stop_tx_ba_cb(sta, i, tid_tx);
361 }
362 }
363}
364
365void ieee80211_ba_session_work(struct wiphy *wiphy, struct wiphy_work *work)
366{
367 struct sta_info *sta =
368 container_of(work, struct sta_info, ampdu_mlme.work);
369 struct tid_ampdu_tx *tid_tx;
370 bool blocked;
371 int tid;
372
373 lockdep_assert_wiphy(sta->local->hw.wiphy);
374
375 /* When this flag is set, new sessions should be blocked. */
376 blocked = test_sta_flag(sta, WLAN_STA_BLOCK_BA);
377
378 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
379 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
380 __ieee80211_stop_rx_ba_session(
381 sta, tid, WLAN_BACK_RECIPIENT,
382 WLAN_REASON_QSTA_TIMEOUT, true);
383
384 if (test_and_clear_bit(tid,
385 sta->ampdu_mlme.tid_rx_stop_requested))
386 __ieee80211_stop_rx_ba_session(
387 sta, tid, WLAN_BACK_RECIPIENT,
388 WLAN_REASON_UNSPECIFIED, true);
389
390 if (!blocked &&
391 test_and_clear_bit(tid,
392 sta->ampdu_mlme.tid_rx_manage_offl))
393 __ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid,
394 IEEE80211_MAX_AMPDU_BUF_HT,
395 false, true, false, 0);
396
397 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS,
398 sta->ampdu_mlme.tid_rx_manage_offl))
399 __ieee80211_stop_rx_ba_session(
400 sta, tid, WLAN_BACK_RECIPIENT,
401 0, false);
402
403 spin_lock_bh(&sta->lock);
404
405 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
406 if (!blocked && tid_tx) {
407 struct txq_info *txqi = to_txq_info(sta->sta.txq[tid]);
408 struct ieee80211_sub_if_data *sdata =
409 vif_to_sdata(txqi->txq.vif);
410 struct fq *fq = &sdata->local->fq;
411
412 spin_lock_bh(&fq->lock);
413
414 /* Allow only frags to be dequeued */
415 set_bit(IEEE80211_TXQ_STOP, &txqi->flags);
416
417 if (!skb_queue_empty(&txqi->frags)) {
418 /* Fragmented Tx is ongoing, wait for it to
419 * finish. Reschedule worker to retry later.
420 */
421
422 spin_unlock_bh(&fq->lock);
423 spin_unlock_bh(&sta->lock);
424
425 /* Give the task working on the txq a chance
426 * to send out the queued frags
427 */
428 synchronize_net();
429
430 wiphy_work_queue(sdata->local->hw.wiphy, work);
431 return;
432 }
433
434 spin_unlock_bh(&fq->lock);
435
436 /*
437 * Assign it over to the normal tid_tx array
438 * where it "goes live".
439 */
440
441 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
442 /* could there be a race? */
443 if (sta->ampdu_mlme.tid_tx[tid])
444 kfree(tid_tx);
445 else
446 ieee80211_assign_tid_tx(sta, tid, tid_tx);
447 spin_unlock_bh(&sta->lock);
448
449 ieee80211_tx_ba_session_handle_start(sta, tid);
450 continue;
451 }
452 spin_unlock_bh(&sta->lock);
453
454 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
455 if (!tid_tx)
456 continue;
457
458 if (!blocked &&
459 test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state))
460 ieee80211_start_tx_ba_cb(sta, tid, tid_tx);
461 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state))
462 __ieee80211_stop_tx_ba_session(sta, tid,
463 AGG_STOP_LOCAL_REQUEST);
464 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
465 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx);
466 }
467}
468
469void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
470 const u8 *da, u16 tid,
471 u16 initiator, u16 reason_code,
472 bool use_ndp)
473{
474 struct ieee80211_local *local = sdata->local;
475 struct sk_buff *skb;
476 struct ieee80211_mgmt *mgmt;
477 u16 params;
478
479 skb = dev_alloc_skb(IEEE80211_MIN_ACTION_SIZE(delba) +
480 local->hw.extra_tx_headroom);
481 if (!skb)
482 return;
483
484 skb_reserve(skb, local->hw.extra_tx_headroom);
485 mgmt = ieee80211_mgmt_ba(skb, da, sdata);
486
487 skb_put(skb, 2 + sizeof(mgmt->u.action.delba));
488
489 mgmt->u.action.category = WLAN_CATEGORY_BACK;
490 mgmt->u.action.action_code = use_ndp ?
491 WLAN_ACTION_NDP_DELBA : WLAN_ACTION_DELBA;
492 params = (u16)(initiator << 11); /* bit 11 initiator */
493 params |= (u16)(tid << 12); /* bit 15:12 TID number */
494
495 mgmt->u.action.delba.params = cpu_to_le16(params);
496 mgmt->u.action.delba.reason_code = cpu_to_le16(reason_code);
497
498 ieee80211_tx_skb(sdata, skb);
499}
500
501void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
502 struct sta_info *sta,
503 struct ieee80211_mgmt *mgmt, size_t len)
504{
505 u16 tid, params;
506 u16 initiator;
507
508 params = le16_to_cpu(mgmt->u.action.delba.params);
509 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
510 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
511
512 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
513 mgmt->sa, initiator ? "initiator" : "recipient",
514 tid,
515 le16_to_cpu(mgmt->u.action.delba.reason_code));
516
517 if (initiator == WLAN_BACK_INITIATOR)
518 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
519 true);
520 else
521 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
522}
523
524enum nl80211_smps_mode
525ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps)
526{
527 switch (smps) {
528 case IEEE80211_SMPS_OFF:
529 return NL80211_SMPS_OFF;
530 case IEEE80211_SMPS_STATIC:
531 return NL80211_SMPS_STATIC;
532 case IEEE80211_SMPS_DYNAMIC:
533 return NL80211_SMPS_DYNAMIC;
534 default:
535 return NL80211_SMPS_OFF;
536 }
537}
538
539int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
540 enum ieee80211_smps_mode smps, const u8 *da,
541 const u8 *bssid, int link_id)
542{
543 struct ieee80211_local *local = sdata->local;
544 struct sk_buff *skb;
545 struct ieee80211_mgmt *action_frame;
546 struct ieee80211_tx_info *info;
547 u8 status_link_id = link_id < 0 ? 0 : link_id;
548
549 skb = dev_alloc_skb(IEEE80211_MIN_ACTION_SIZE(ht_smps) +
550 local->hw.extra_tx_headroom);
551 if (!skb)
552 return -ENOMEM;
553
554 skb_reserve(skb, local->hw.extra_tx_headroom);
555 action_frame = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ht_smps));
556 memcpy(action_frame->da, da, ETH_ALEN);
557 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
558 memcpy(action_frame->bssid, bssid, ETH_ALEN);
559 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
560 IEEE80211_STYPE_ACTION);
561 action_frame->u.action.category = WLAN_CATEGORY_HT;
562 action_frame->u.action.action_code = WLAN_HT_ACTION_SMPS;
563 switch (smps) {
564 case IEEE80211_SMPS_AUTOMATIC:
565 case IEEE80211_SMPS_NUM_MODES:
566 WARN_ON(1);
567 smps = IEEE80211_SMPS_OFF;
568 fallthrough;
569 case IEEE80211_SMPS_OFF:
570 action_frame->u.action.ht_smps.smps_control =
571 WLAN_HT_SMPS_CONTROL_DISABLED;
572 break;
573 case IEEE80211_SMPS_STATIC:
574 action_frame->u.action.ht_smps.smps_control =
575 WLAN_HT_SMPS_CONTROL_STATIC;
576 break;
577 case IEEE80211_SMPS_DYNAMIC:
578 action_frame->u.action.ht_smps.smps_control =
579 WLAN_HT_SMPS_CONTROL_DYNAMIC;
580 break;
581 }
582
583 /* we'll do more on status of this frame */
584 info = IEEE80211_SKB_CB(skb);
585 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
586 /* we have 13 bits, and need 6: link_id 4, smps 2 */
587 info->status_data = IEEE80211_STATUS_TYPE_SMPS |
588 u16_encode_bits(status_link_id << 2 | smps,
589 IEEE80211_STATUS_SUBDATA_MASK);
590 ieee80211_tx_skb_tid(sdata, skb, 7, link_id);
591
592 return 0;
593}
594
595void ieee80211_request_smps(struct ieee80211_vif *vif, unsigned int link_id,
596 enum ieee80211_smps_mode smps_mode)
597{
598 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
599 struct ieee80211_link_data *link;
600
601 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION))
602 return;
603
604 rcu_read_lock();
605 link = rcu_dereference(sdata->link[link_id]);
606 if (WARN_ON(!link))
607 goto out;
608
609 trace_api_request_smps(sdata->local, sdata, link, smps_mode);
610
611 if (link->u.mgd.driver_smps_mode == smps_mode)
612 goto out;
613
614 link->u.mgd.driver_smps_mode = smps_mode;
615 wiphy_work_queue(sdata->local->hw.wiphy,
616 &link->u.mgd.request_smps_work);
617out:
618 rcu_read_unlock();
619}
620/* this might change ... don't want non-open drivers using it */
621EXPORT_SYMBOL_GPL(ieee80211_request_smps);
622
623void ieee80211_ht_handle_chanwidth_notif(struct ieee80211_local *local,
624 struct ieee80211_sub_if_data *sdata,
625 struct sta_info *sta,
626 struct link_sta_info *link_sta,
627 u8 chanwidth, enum nl80211_band band)
628{
629 enum ieee80211_sta_rx_bandwidth max_bw, new_bw;
630 struct ieee80211_supported_band *sband;
631 struct sta_opmode_info sta_opmode = {};
632
633 lockdep_assert_wiphy(local->hw.wiphy);
634
635 if (chanwidth == IEEE80211_HT_CHANWIDTH_20MHZ)
636 max_bw = IEEE80211_STA_RX_BW_20;
637 else
638 max_bw = ieee80211_sta_cap_rx_bw(link_sta);
639
640 /* set cur_max_bandwidth and recalc sta bw */
641 link_sta->cur_max_bandwidth = max_bw;
642 new_bw = ieee80211_sta_cur_vht_bw(link_sta);
643
644 if (link_sta->pub->bandwidth == new_bw)
645 return;
646
647 link_sta->pub->bandwidth = new_bw;
648 sband = local->hw.wiphy->bands[band];
649 sta_opmode.bw =
650 ieee80211_sta_rx_bw_to_chan_width(link_sta);
651 sta_opmode.changed = STA_OPMODE_MAX_BW_CHANGED;
652
653 rate_control_rate_update(local, sband, link_sta,
654 IEEE80211_RC_BW_CHANGED);
655 cfg80211_sta_opmode_change_notify(sdata->dev,
656 sta->addr,
657 &sta_opmode,
658 GFP_KERNEL);
659}