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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) 2020-2021 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 struct ieee80211_supported_band *sband,
140 const struct ieee80211_ht_cap *ht_cap_ie,
141 struct sta_info *sta)
142{
143 struct ieee80211_sta_ht_cap ht_cap, own_cap;
144 u8 ampdu_info, tx_mcs_set_cap;
145 int i, max_tx_streams;
146 bool changed;
147 enum ieee80211_sta_rx_bandwidth bw;
148
149 memset(&ht_cap, 0, sizeof(ht_cap));
150
151 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
152 goto apply;
153
154 ht_cap.ht_supported = true;
155
156 own_cap = sband->ht_cap;
157
158 /*
159 * If user has specified capability over-rides, take care
160 * of that if the station we're setting up is the AP or TDLS peer that
161 * we advertised a restricted capability set to. Override
162 * our own capabilities and then use those below.
163 */
164 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
165 sdata->vif.type == NL80211_IFTYPE_ADHOC)
166 ieee80211_apply_htcap_overrides(sdata, &own_cap);
167
168 /*
169 * The bits listed in this expression should be
170 * the same for the peer and us, if the station
171 * advertises more then we can't use those thus
172 * we mask them out.
173 */
174 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
175 (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING |
176 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
177 IEEE80211_HT_CAP_GRN_FLD |
178 IEEE80211_HT_CAP_SGI_20 |
179 IEEE80211_HT_CAP_SGI_40 |
180 IEEE80211_HT_CAP_DSSSCCK40));
181
182 /*
183 * The STBC bits are asymmetric -- if we don't have
184 * TX then mask out the peer's RX and vice versa.
185 */
186 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
187 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
188 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
189 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
190
191 ampdu_info = ht_cap_ie->ampdu_params_info;
192 ht_cap.ampdu_factor =
193 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
194 ht_cap.ampdu_density =
195 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
196
197 /* own MCS TX capabilities */
198 tx_mcs_set_cap = own_cap.mcs.tx_params;
199
200 /* Copy peer MCS TX capabilities, the driver might need them. */
201 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
202
203 /* can we TX with MCS rates? */
204 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
205 goto apply;
206
207 /* Counting from 0, therefore +1 */
208 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
209 max_tx_streams =
210 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
211 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
212 else
213 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
214
215 /*
216 * 802.11n-2009 20.3.5 / 20.6 says:
217 * - indices 0 to 7 and 32 are single spatial stream
218 * - 8 to 31 are multiple spatial streams using equal modulation
219 * [8..15 for two streams, 16..23 for three and 24..31 for four]
220 * - remainder are multiple spatial streams using unequal modulation
221 */
222 for (i = 0; i < max_tx_streams; i++)
223 ht_cap.mcs.rx_mask[i] =
224 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
225
226 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
227 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
228 i < IEEE80211_HT_MCS_MASK_LEN; i++)
229 ht_cap.mcs.rx_mask[i] =
230 own_cap.mcs.rx_mask[i] &
231 ht_cap_ie->mcs.rx_mask[i];
232
233 /* handle MCS rate 32 too */
234 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
235 ht_cap.mcs.rx_mask[32/8] |= 1;
236
237 /* set Rx highest rate */
238 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest;
239
240 if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU)
241 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935;
242 else
243 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839;
244
245 apply:
246 changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
247
248 memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
249
250 switch (sdata->vif.bss_conf.chandef.width) {
251 default:
252 WARN_ON_ONCE(1);
253 fallthrough;
254 case NL80211_CHAN_WIDTH_20_NOHT:
255 case NL80211_CHAN_WIDTH_20:
256 bw = IEEE80211_STA_RX_BW_20;
257 break;
258 case NL80211_CHAN_WIDTH_40:
259 case NL80211_CHAN_WIDTH_80:
260 case NL80211_CHAN_WIDTH_80P80:
261 case NL80211_CHAN_WIDTH_160:
262 bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
263 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
264 break;
265 }
266
267 sta->sta.bandwidth = bw;
268
269 sta->cur_max_bandwidth =
270 ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
271 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
272
273 if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
274 sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
275 enum ieee80211_smps_mode smps_mode;
276
277 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
278 >> IEEE80211_HT_CAP_SM_PS_SHIFT) {
279 case WLAN_HT_CAP_SM_PS_INVALID:
280 case WLAN_HT_CAP_SM_PS_STATIC:
281 smps_mode = IEEE80211_SMPS_STATIC;
282 break;
283 case WLAN_HT_CAP_SM_PS_DYNAMIC:
284 smps_mode = IEEE80211_SMPS_DYNAMIC;
285 break;
286 case WLAN_HT_CAP_SM_PS_DISABLED:
287 smps_mode = IEEE80211_SMPS_OFF;
288 break;
289 }
290
291 if (smps_mode != sta->sta.smps_mode)
292 changed = true;
293 sta->sta.smps_mode = smps_mode;
294 } else {
295 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
296 }
297 return changed;
298}
299
300void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
301 enum ieee80211_agg_stop_reason reason)
302{
303 int i;
304
305 mutex_lock(&sta->ampdu_mlme.mtx);
306 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
307 ___ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
308 WLAN_REASON_QSTA_LEAVE_QBSS,
309 reason != AGG_STOP_DESTROY_STA &&
310 reason != AGG_STOP_PEER_REQUEST);
311
312 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
313 ___ieee80211_stop_tx_ba_session(sta, i, reason);
314 mutex_unlock(&sta->ampdu_mlme.mtx);
315
316 /*
317 * In case the tear down is part of a reconfigure due to HW restart
318 * request, it is possible that the low level driver requested to stop
319 * the BA session, so handle it to properly clean tid_tx data.
320 */
321 if(reason == AGG_STOP_DESTROY_STA) {
322 cancel_work_sync(&sta->ampdu_mlme.work);
323
324 mutex_lock(&sta->ampdu_mlme.mtx);
325 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
326 struct tid_ampdu_tx *tid_tx =
327 rcu_dereference_protected_tid_tx(sta, i);
328
329 if (!tid_tx)
330 continue;
331
332 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
333 ieee80211_stop_tx_ba_cb(sta, i, tid_tx);
334 }
335 mutex_unlock(&sta->ampdu_mlme.mtx);
336 }
337}
338
339void ieee80211_ba_session_work(struct work_struct *work)
340{
341 struct sta_info *sta =
342 container_of(work, struct sta_info, ampdu_mlme.work);
343 struct tid_ampdu_tx *tid_tx;
344 bool blocked;
345 int tid;
346
347 /* When this flag is set, new sessions should be blocked. */
348 blocked = test_sta_flag(sta, WLAN_STA_BLOCK_BA);
349
350 mutex_lock(&sta->ampdu_mlme.mtx);
351 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
352 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
353 ___ieee80211_stop_rx_ba_session(
354 sta, tid, WLAN_BACK_RECIPIENT,
355 WLAN_REASON_QSTA_TIMEOUT, true);
356
357 if (test_and_clear_bit(tid,
358 sta->ampdu_mlme.tid_rx_stop_requested))
359 ___ieee80211_stop_rx_ba_session(
360 sta, tid, WLAN_BACK_RECIPIENT,
361 WLAN_REASON_UNSPECIFIED, true);
362
363 if (!blocked &&
364 test_and_clear_bit(tid,
365 sta->ampdu_mlme.tid_rx_manage_offl))
366 ___ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid,
367 IEEE80211_MAX_AMPDU_BUF_HT,
368 false, true, NULL);
369
370 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS,
371 sta->ampdu_mlme.tid_rx_manage_offl))
372 ___ieee80211_stop_rx_ba_session(
373 sta, tid, WLAN_BACK_RECIPIENT,
374 0, false);
375
376 spin_lock_bh(&sta->lock);
377
378 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
379 if (!blocked && tid_tx) {
380 /*
381 * Assign it over to the normal tid_tx array
382 * where it "goes live".
383 */
384
385 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
386 /* could there be a race? */
387 if (sta->ampdu_mlme.tid_tx[tid])
388 kfree(tid_tx);
389 else
390 ieee80211_assign_tid_tx(sta, tid, tid_tx);
391 spin_unlock_bh(&sta->lock);
392
393 ieee80211_tx_ba_session_handle_start(sta, tid);
394 continue;
395 }
396 spin_unlock_bh(&sta->lock);
397
398 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
399 if (!tid_tx)
400 continue;
401
402 if (!blocked &&
403 test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state))
404 ieee80211_start_tx_ba_cb(sta, tid, tid_tx);
405 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state))
406 ___ieee80211_stop_tx_ba_session(sta, tid,
407 AGG_STOP_LOCAL_REQUEST);
408 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
409 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx);
410 }
411 mutex_unlock(&sta->ampdu_mlme.mtx);
412}
413
414void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
415 const u8 *da, u16 tid,
416 u16 initiator, u16 reason_code)
417{
418 struct ieee80211_local *local = sdata->local;
419 struct sk_buff *skb;
420 struct ieee80211_mgmt *mgmt;
421 u16 params;
422
423 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
424 if (!skb)
425 return;
426
427 skb_reserve(skb, local->hw.extra_tx_headroom);
428 mgmt = skb_put_zero(skb, 24);
429 memcpy(mgmt->da, da, ETH_ALEN);
430 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
431 if (sdata->vif.type == NL80211_IFTYPE_AP ||
432 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
433 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
434 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
435 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
436 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
437 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
438 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
439
440 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
441 IEEE80211_STYPE_ACTION);
442
443 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
444
445 mgmt->u.action.category = WLAN_CATEGORY_BACK;
446 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
447 params = (u16)(initiator << 11); /* bit 11 initiator */
448 params |= (u16)(tid << 12); /* bit 15:12 TID number */
449
450 mgmt->u.action.u.delba.params = cpu_to_le16(params);
451 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
452
453 ieee80211_tx_skb(sdata, skb);
454}
455
456void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
457 struct sta_info *sta,
458 struct ieee80211_mgmt *mgmt, size_t len)
459{
460 u16 tid, params;
461 u16 initiator;
462
463 params = le16_to_cpu(mgmt->u.action.u.delba.params);
464 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
465 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
466
467 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
468 mgmt->sa, initiator ? "initiator" : "recipient",
469 tid,
470 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
471
472 if (initiator == WLAN_BACK_INITIATOR)
473 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
474 true);
475 else
476 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
477}
478
479enum nl80211_smps_mode
480ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps)
481{
482 switch (smps) {
483 case IEEE80211_SMPS_OFF:
484 return NL80211_SMPS_OFF;
485 case IEEE80211_SMPS_STATIC:
486 return NL80211_SMPS_STATIC;
487 case IEEE80211_SMPS_DYNAMIC:
488 return NL80211_SMPS_DYNAMIC;
489 default:
490 return NL80211_SMPS_OFF;
491 }
492}
493
494int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
495 enum ieee80211_smps_mode smps, const u8 *da,
496 const u8 *bssid)
497{
498 struct ieee80211_local *local = sdata->local;
499 struct sk_buff *skb;
500 struct ieee80211_mgmt *action_frame;
501
502 /* 27 = header + category + action + smps mode */
503 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
504 if (!skb)
505 return -ENOMEM;
506
507 skb_reserve(skb, local->hw.extra_tx_headroom);
508 action_frame = skb_put(skb, 27);
509 memcpy(action_frame->da, da, ETH_ALEN);
510 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
511 memcpy(action_frame->bssid, bssid, ETH_ALEN);
512 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
513 IEEE80211_STYPE_ACTION);
514 action_frame->u.action.category = WLAN_CATEGORY_HT;
515 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
516 switch (smps) {
517 case IEEE80211_SMPS_AUTOMATIC:
518 case IEEE80211_SMPS_NUM_MODES:
519 WARN_ON(1);
520 fallthrough;
521 case IEEE80211_SMPS_OFF:
522 action_frame->u.action.u.ht_smps.smps_control =
523 WLAN_HT_SMPS_CONTROL_DISABLED;
524 break;
525 case IEEE80211_SMPS_STATIC:
526 action_frame->u.action.u.ht_smps.smps_control =
527 WLAN_HT_SMPS_CONTROL_STATIC;
528 break;
529 case IEEE80211_SMPS_DYNAMIC:
530 action_frame->u.action.u.ht_smps.smps_control =
531 WLAN_HT_SMPS_CONTROL_DYNAMIC;
532 break;
533 }
534
535 /* we'll do more on status of this frame */
536 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
537 ieee80211_tx_skb(sdata, skb);
538
539 return 0;
540}
541
542void ieee80211_request_smps_mgd_work(struct work_struct *work)
543{
544 struct ieee80211_sub_if_data *sdata =
545 container_of(work, struct ieee80211_sub_if_data,
546 u.mgd.request_smps_work);
547
548 sdata_lock(sdata);
549 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
550 sdata_unlock(sdata);
551}
552
553void ieee80211_request_smps(struct ieee80211_vif *vif,
554 enum ieee80211_smps_mode smps_mode)
555{
556 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
557
558 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION))
559 return;
560
561 if (sdata->u.mgd.driver_smps_mode == smps_mode)
562 return;
563
564 sdata->u.mgd.driver_smps_mode = smps_mode;
565 ieee80211_queue_work(&sdata->local->hw,
566 &sdata->u.mgd.request_smps_work);
567}
568/* this might change ... don't want non-open drivers using it */
569EXPORT_SYMBOL_GPL(ieee80211_request_smps);
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
23static 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
35static 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
47void 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 decrease AMPDU factor */
111 if (ht_capa_mask->ampdu_params_info &
112 IEEE80211_HT_AMPDU_PARM_FACTOR) {
113 u8 n = ht_capa->ampdu_params_info &
114 IEEE80211_HT_AMPDU_PARM_FACTOR;
115 if (n < ht_cap->ampdu_factor)
116 ht_cap->ampdu_factor = n;
117 }
118
119 /* Allow the user to increase AMPDU density. */
120 if (ht_capa_mask->ampdu_params_info &
121 IEEE80211_HT_AMPDU_PARM_DENSITY) {
122 u8 n = (ht_capa->ampdu_params_info &
123 IEEE80211_HT_AMPDU_PARM_DENSITY)
124 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
125 if (n > ht_cap->ampdu_density)
126 ht_cap->ampdu_density = n;
127 }
128}
129
130
131bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
132 struct ieee80211_supported_band *sband,
133 const struct ieee80211_ht_cap *ht_cap_ie,
134 struct sta_info *sta)
135{
136 struct ieee80211_sta_ht_cap ht_cap, own_cap;
137 u8 ampdu_info, tx_mcs_set_cap;
138 int i, max_tx_streams;
139 bool changed;
140 enum ieee80211_sta_rx_bandwidth bw;
141 enum ieee80211_smps_mode smps_mode;
142
143 memset(&ht_cap, 0, sizeof(ht_cap));
144
145 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
146 goto apply;
147
148 ht_cap.ht_supported = true;
149
150 own_cap = sband->ht_cap;
151
152 /*
153 * If user has specified capability over-rides, take care
154 * of that if the station we're setting up is the AP or TDLS peer that
155 * we advertised a restricted capability set to. Override
156 * our own capabilities and then use those below.
157 */
158 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
159 sdata->vif.type == NL80211_IFTYPE_ADHOC)
160 ieee80211_apply_htcap_overrides(sdata, &own_cap);
161
162 /*
163 * The bits listed in this expression should be
164 * the same for the peer and us, if the station
165 * advertises more then we can't use those thus
166 * we mask them out.
167 */
168 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
169 (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING |
170 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
171 IEEE80211_HT_CAP_GRN_FLD |
172 IEEE80211_HT_CAP_SGI_20 |
173 IEEE80211_HT_CAP_SGI_40 |
174 IEEE80211_HT_CAP_DSSSCCK40));
175
176 /*
177 * The STBC bits are asymmetric -- if we don't have
178 * TX then mask out the peer's RX and vice versa.
179 */
180 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
181 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
182 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
183 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
184
185 ampdu_info = ht_cap_ie->ampdu_params_info;
186 ht_cap.ampdu_factor =
187 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
188 ht_cap.ampdu_density =
189 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
190
191 /* own MCS TX capabilities */
192 tx_mcs_set_cap = own_cap.mcs.tx_params;
193
194 /* Copy peer MCS TX capabilities, the driver might need them. */
195 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
196
197 /* can we TX with MCS rates? */
198 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
199 goto apply;
200
201 /* Counting from 0, therefore +1 */
202 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
203 max_tx_streams =
204 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
205 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
206 else
207 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
208
209 /*
210 * 802.11n-2009 20.3.5 / 20.6 says:
211 * - indices 0 to 7 and 32 are single spatial stream
212 * - 8 to 31 are multiple spatial streams using equal modulation
213 * [8..15 for two streams, 16..23 for three and 24..31 for four]
214 * - remainder are multiple spatial streams using unequal modulation
215 */
216 for (i = 0; i < max_tx_streams; i++)
217 ht_cap.mcs.rx_mask[i] =
218 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
219
220 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
221 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
222 i < IEEE80211_HT_MCS_MASK_LEN; i++)
223 ht_cap.mcs.rx_mask[i] =
224 own_cap.mcs.rx_mask[i] &
225 ht_cap_ie->mcs.rx_mask[i];
226
227 /* handle MCS rate 32 too */
228 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
229 ht_cap.mcs.rx_mask[32/8] |= 1;
230
231 /* set Rx highest rate */
232 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest;
233
234 if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU)
235 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935;
236 else
237 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839;
238
239 apply:
240 changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
241
242 memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap));
243
244 switch (sdata->vif.bss_conf.chandef.width) {
245 default:
246 WARN_ON_ONCE(1);
247 /* fall through */
248 case NL80211_CHAN_WIDTH_20_NOHT:
249 case NL80211_CHAN_WIDTH_20:
250 bw = IEEE80211_STA_RX_BW_20;
251 break;
252 case NL80211_CHAN_WIDTH_40:
253 case NL80211_CHAN_WIDTH_80:
254 case NL80211_CHAN_WIDTH_80P80:
255 case NL80211_CHAN_WIDTH_160:
256 bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
257 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
258 break;
259 }
260
261 sta->sta.bandwidth = bw;
262
263 sta->cur_max_bandwidth =
264 ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
265 IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
266
267 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
268 >> IEEE80211_HT_CAP_SM_PS_SHIFT) {
269 case WLAN_HT_CAP_SM_PS_INVALID:
270 case WLAN_HT_CAP_SM_PS_STATIC:
271 smps_mode = IEEE80211_SMPS_STATIC;
272 break;
273 case WLAN_HT_CAP_SM_PS_DYNAMIC:
274 smps_mode = IEEE80211_SMPS_DYNAMIC;
275 break;
276 case WLAN_HT_CAP_SM_PS_DISABLED:
277 smps_mode = IEEE80211_SMPS_OFF;
278 break;
279 }
280
281 if (smps_mode != sta->sta.smps_mode)
282 changed = true;
283 sta->sta.smps_mode = smps_mode;
284
285 return changed;
286}
287
288void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
289 enum ieee80211_agg_stop_reason reason)
290{
291 int i;
292
293 mutex_lock(&sta->ampdu_mlme.mtx);
294 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
295 ___ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
296 WLAN_REASON_QSTA_LEAVE_QBSS,
297 reason != AGG_STOP_DESTROY_STA &&
298 reason != AGG_STOP_PEER_REQUEST);
299
300 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
301 ___ieee80211_stop_tx_ba_session(sta, i, reason);
302 mutex_unlock(&sta->ampdu_mlme.mtx);
303
304 /* stopping might queue the work again - so cancel only afterwards */
305 cancel_work_sync(&sta->ampdu_mlme.work);
306
307 /*
308 * In case the tear down is part of a reconfigure due to HW restart
309 * request, it is possible that the low level driver requested to stop
310 * the BA session, so handle it to properly clean tid_tx data.
311 */
312 mutex_lock(&sta->ampdu_mlme.mtx);
313 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
314 struct tid_ampdu_tx *tid_tx =
315 rcu_dereference_protected_tid_tx(sta, i);
316
317 if (!tid_tx)
318 continue;
319
320 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
321 ieee80211_stop_tx_ba_cb(sta, i, tid_tx);
322 }
323 mutex_unlock(&sta->ampdu_mlme.mtx);
324}
325
326void ieee80211_ba_session_work(struct work_struct *work)
327{
328 struct sta_info *sta =
329 container_of(work, struct sta_info, ampdu_mlme.work);
330 struct tid_ampdu_tx *tid_tx;
331 int tid;
332
333 /*
334 * When this flag is set, new sessions should be
335 * blocked, and existing sessions will be torn
336 * down by the code that set the flag, so this
337 * need not run.
338 */
339 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
340 return;
341
342 mutex_lock(&sta->ampdu_mlme.mtx);
343 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
344 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
345 ___ieee80211_stop_rx_ba_session(
346 sta, tid, WLAN_BACK_RECIPIENT,
347 WLAN_REASON_QSTA_TIMEOUT, true);
348
349 if (test_and_clear_bit(tid,
350 sta->ampdu_mlme.tid_rx_stop_requested))
351 ___ieee80211_stop_rx_ba_session(
352 sta, tid, WLAN_BACK_RECIPIENT,
353 WLAN_REASON_UNSPECIFIED, true);
354
355 if (test_and_clear_bit(tid,
356 sta->ampdu_mlme.tid_rx_manage_offl))
357 ___ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid,
358 IEEE80211_MAX_AMPDU_BUF,
359 false, true);
360
361 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS,
362 sta->ampdu_mlme.tid_rx_manage_offl))
363 ___ieee80211_stop_rx_ba_session(
364 sta, tid, WLAN_BACK_RECIPIENT,
365 0, false);
366
367 spin_lock_bh(&sta->lock);
368
369 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
370 if (tid_tx) {
371 /*
372 * Assign it over to the normal tid_tx array
373 * where it "goes live".
374 */
375
376 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
377 /* could there be a race? */
378 if (sta->ampdu_mlme.tid_tx[tid])
379 kfree(tid_tx);
380 else
381 ieee80211_assign_tid_tx(sta, tid, tid_tx);
382 spin_unlock_bh(&sta->lock);
383
384 ieee80211_tx_ba_session_handle_start(sta, tid);
385 continue;
386 }
387 spin_unlock_bh(&sta->lock);
388
389 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
390 if (!tid_tx)
391 continue;
392
393 if (test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state))
394 ieee80211_start_tx_ba_cb(sta, tid, tid_tx);
395 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state))
396 ___ieee80211_stop_tx_ba_session(sta, tid,
397 AGG_STOP_LOCAL_REQUEST);
398 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
399 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx);
400 }
401 mutex_unlock(&sta->ampdu_mlme.mtx);
402}
403
404void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
405 const u8 *da, u16 tid,
406 u16 initiator, u16 reason_code)
407{
408 struct ieee80211_local *local = sdata->local;
409 struct sk_buff *skb;
410 struct ieee80211_mgmt *mgmt;
411 u16 params;
412
413 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
414 if (!skb)
415 return;
416
417 skb_reserve(skb, local->hw.extra_tx_headroom);
418 mgmt = skb_put_zero(skb, 24);
419 memcpy(mgmt->da, da, ETH_ALEN);
420 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
421 if (sdata->vif.type == NL80211_IFTYPE_AP ||
422 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
423 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
424 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
425 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
426 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
427 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
428 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
429
430 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
431 IEEE80211_STYPE_ACTION);
432
433 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
434
435 mgmt->u.action.category = WLAN_CATEGORY_BACK;
436 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
437 params = (u16)(initiator << 11); /* bit 11 initiator */
438 params |= (u16)(tid << 12); /* bit 15:12 TID number */
439
440 mgmt->u.action.u.delba.params = cpu_to_le16(params);
441 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
442
443 ieee80211_tx_skb(sdata, skb);
444}
445
446void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
447 struct sta_info *sta,
448 struct ieee80211_mgmt *mgmt, size_t len)
449{
450 u16 tid, params;
451 u16 initiator;
452
453 params = le16_to_cpu(mgmt->u.action.u.delba.params);
454 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
455 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
456
457 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
458 mgmt->sa, initiator ? "initiator" : "recipient",
459 tid,
460 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
461
462 if (initiator == WLAN_BACK_INITIATOR)
463 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
464 true);
465 else
466 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
467}
468
469enum nl80211_smps_mode
470ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps)
471{
472 switch (smps) {
473 case IEEE80211_SMPS_OFF:
474 return NL80211_SMPS_OFF;
475 case IEEE80211_SMPS_STATIC:
476 return NL80211_SMPS_STATIC;
477 case IEEE80211_SMPS_DYNAMIC:
478 return NL80211_SMPS_DYNAMIC;
479 default:
480 return NL80211_SMPS_OFF;
481 }
482}
483
484int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
485 enum ieee80211_smps_mode smps, const u8 *da,
486 const u8 *bssid)
487{
488 struct ieee80211_local *local = sdata->local;
489 struct sk_buff *skb;
490 struct ieee80211_mgmt *action_frame;
491
492 /* 27 = header + category + action + smps mode */
493 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
494 if (!skb)
495 return -ENOMEM;
496
497 skb_reserve(skb, local->hw.extra_tx_headroom);
498 action_frame = skb_put(skb, 27);
499 memcpy(action_frame->da, da, ETH_ALEN);
500 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
501 memcpy(action_frame->bssid, bssid, ETH_ALEN);
502 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
503 IEEE80211_STYPE_ACTION);
504 action_frame->u.action.category = WLAN_CATEGORY_HT;
505 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
506 switch (smps) {
507 case IEEE80211_SMPS_AUTOMATIC:
508 case IEEE80211_SMPS_NUM_MODES:
509 WARN_ON(1);
510 /* fall through */
511 case IEEE80211_SMPS_OFF:
512 action_frame->u.action.u.ht_smps.smps_control =
513 WLAN_HT_SMPS_CONTROL_DISABLED;
514 break;
515 case IEEE80211_SMPS_STATIC:
516 action_frame->u.action.u.ht_smps.smps_control =
517 WLAN_HT_SMPS_CONTROL_STATIC;
518 break;
519 case IEEE80211_SMPS_DYNAMIC:
520 action_frame->u.action.u.ht_smps.smps_control =
521 WLAN_HT_SMPS_CONTROL_DYNAMIC;
522 break;
523 }
524
525 /* we'll do more on status of this frame */
526 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
527 ieee80211_tx_skb(sdata, skb);
528
529 return 0;
530}
531
532void ieee80211_request_smps_mgd_work(struct work_struct *work)
533{
534 struct ieee80211_sub_if_data *sdata =
535 container_of(work, struct ieee80211_sub_if_data,
536 u.mgd.request_smps_work);
537
538 sdata_lock(sdata);
539 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
540 sdata_unlock(sdata);
541}
542
543void ieee80211_request_smps_ap_work(struct work_struct *work)
544{
545 struct ieee80211_sub_if_data *sdata =
546 container_of(work, struct ieee80211_sub_if_data,
547 u.ap.request_smps_work);
548
549 sdata_lock(sdata);
550 if (sdata_dereference(sdata->u.ap.beacon, sdata))
551 __ieee80211_request_smps_ap(sdata,
552 sdata->u.ap.driver_smps_mode);
553 sdata_unlock(sdata);
554}
555
556void ieee80211_request_smps(struct ieee80211_vif *vif,
557 enum ieee80211_smps_mode smps_mode)
558{
559 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
560
561 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION &&
562 vif->type != NL80211_IFTYPE_AP))
563 return;
564
565 if (vif->type == NL80211_IFTYPE_STATION) {
566 if (sdata->u.mgd.driver_smps_mode == smps_mode)
567 return;
568 sdata->u.mgd.driver_smps_mode = smps_mode;
569 ieee80211_queue_work(&sdata->local->hw,
570 &sdata->u.mgd.request_smps_work);
571 } else {
572 /* AUTOMATIC is meaningless in AP mode */
573 if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC))
574 return;
575 if (sdata->u.ap.driver_smps_mode == smps_mode)
576 return;
577 sdata->u.ap.driver_smps_mode = smps_mode;
578 ieee80211_queue_work(&sdata->local->hw,
579 &sdata->u.ap.request_smps_work);
580 }
581}
582/* this might change ... don't want non-open drivers using it */
583EXPORT_SYMBOL_GPL(ieee80211_request_smps);