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 */
13
14 #include <linux/ieee80211.h>
15 #include <linux/export.h>
16 #include <net/mac80211.h>
17 #include "ieee80211_i.h"
18 #include "rate.h"
19
__check_htcap_disable(struct ieee80211_ht_cap * ht_capa,struct ieee80211_ht_cap * ht_capa_mask,struct ieee80211_sta_ht_cap * ht_cap,u16 flag)20 static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa,
21 struct ieee80211_ht_cap *ht_capa_mask,
22 struct ieee80211_sta_ht_cap *ht_cap,
23 u16 flag)
24 {
25 __le16 le_flag = cpu_to_le16(flag);
26 if (ht_capa_mask->cap_info & le_flag) {
27 if (!(ht_capa->cap_info & le_flag))
28 ht_cap->cap &= ~flag;
29 }
30 }
31
__check_htcap_enable(struct ieee80211_ht_cap * ht_capa,struct ieee80211_ht_cap * ht_capa_mask,struct ieee80211_sta_ht_cap * ht_cap,u16 flag)32 static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa,
33 struct ieee80211_ht_cap *ht_capa_mask,
34 struct ieee80211_sta_ht_cap *ht_cap,
35 u16 flag)
36 {
37 __le16 le_flag = cpu_to_le16(flag);
38
39 if ((ht_capa_mask->cap_info & le_flag) &&
40 (ht_capa->cap_info & le_flag))
41 ht_cap->cap |= flag;
42 }
43
ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data * sdata,struct ieee80211_sta_ht_cap * ht_cap)44 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
45 struct ieee80211_sta_ht_cap *ht_cap)
46 {
47 struct ieee80211_ht_cap *ht_capa, *ht_capa_mask;
48 u8 *scaps, *smask;
49 int i;
50
51 if (!ht_cap->ht_supported)
52 return;
53
54 switch (sdata->vif.type) {
55 case NL80211_IFTYPE_STATION:
56 ht_capa = &sdata->u.mgd.ht_capa;
57 ht_capa_mask = &sdata->u.mgd.ht_capa_mask;
58 break;
59 case NL80211_IFTYPE_ADHOC:
60 ht_capa = &sdata->u.ibss.ht_capa;
61 ht_capa_mask = &sdata->u.ibss.ht_capa_mask;
62 break;
63 default:
64 WARN_ON_ONCE(1);
65 return;
66 }
67
68 scaps = (u8 *)(&ht_capa->mcs.rx_mask);
69 smask = (u8 *)(&ht_capa_mask->mcs.rx_mask);
70
71 /* NOTE: If you add more over-rides here, update register_hw
72 * ht_capa_mod_mask logic in main.c as well.
73 * And, if this method can ever change ht_cap.ht_supported, fix
74 * the check in ieee80211_add_ht_ie.
75 */
76
77 /* check for HT over-rides, MCS rates first. */
78 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
79 u8 m = smask[i];
80 ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */
81 /* Add back rates that are supported */
82 ht_cap->mcs.rx_mask[i] |= (m & scaps[i]);
83 }
84
85 /* Force removal of HT-40 capabilities? */
86 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
87 IEEE80211_HT_CAP_SUP_WIDTH_20_40);
88 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
89 IEEE80211_HT_CAP_SGI_40);
90
91 /* Allow user to disable SGI-20 (SGI-40 is handled above) */
92 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
93 IEEE80211_HT_CAP_SGI_20);
94
95 /* Allow user to disable the max-AMSDU bit. */
96 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
97 IEEE80211_HT_CAP_MAX_AMSDU);
98
99 /* Allow user to disable LDPC */
100 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
101 IEEE80211_HT_CAP_LDPC_CODING);
102
103 /* Allow user to enable 40 MHz intolerant bit. */
104 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap,
105 IEEE80211_HT_CAP_40MHZ_INTOLERANT);
106
107 /* Allow user to enable TX STBC bit */
108 __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap,
109 IEEE80211_HT_CAP_TX_STBC);
110
111 /* Allow user to configure RX STBC bits */
112 if (ht_capa_mask->cap_info & cpu_to_le16(IEEE80211_HT_CAP_RX_STBC))
113 ht_cap->cap |= le16_to_cpu(ht_capa->cap_info) &
114 IEEE80211_HT_CAP_RX_STBC;
115
116 /* Allow user to decrease AMPDU factor */
117 if (ht_capa_mask->ampdu_params_info &
118 IEEE80211_HT_AMPDU_PARM_FACTOR) {
119 u8 n = ht_capa->ampdu_params_info &
120 IEEE80211_HT_AMPDU_PARM_FACTOR;
121 if (n < ht_cap->ampdu_factor)
122 ht_cap->ampdu_factor = n;
123 }
124
125 /* Allow the user to increase AMPDU density. */
126 if (ht_capa_mask->ampdu_params_info &
127 IEEE80211_HT_AMPDU_PARM_DENSITY) {
128 u8 n = (ht_capa->ampdu_params_info &
129 IEEE80211_HT_AMPDU_PARM_DENSITY)
130 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
131 if (n > ht_cap->ampdu_density)
132 ht_cap->ampdu_density = n;
133 }
134 }
135
136
ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const struct ieee80211_ht_cap * ht_cap_ie,struct sta_info * sta)137 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
138 struct ieee80211_supported_band *sband,
139 const struct ieee80211_ht_cap *ht_cap_ie,
140 struct sta_info *sta)
141 {
142 struct ieee80211_sta_ht_cap ht_cap, own_cap;
143 u8 ampdu_info, tx_mcs_set_cap;
144 int i, max_tx_streams;
145 bool changed;
146 enum ieee80211_sta_rx_bandwidth bw;
147 enum ieee80211_smps_mode smps_mode;
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 /* fall through */
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 switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS)
274 >> IEEE80211_HT_CAP_SM_PS_SHIFT) {
275 case WLAN_HT_CAP_SM_PS_INVALID:
276 case WLAN_HT_CAP_SM_PS_STATIC:
277 smps_mode = IEEE80211_SMPS_STATIC;
278 break;
279 case WLAN_HT_CAP_SM_PS_DYNAMIC:
280 smps_mode = IEEE80211_SMPS_DYNAMIC;
281 break;
282 case WLAN_HT_CAP_SM_PS_DISABLED:
283 smps_mode = IEEE80211_SMPS_OFF;
284 break;
285 }
286
287 if (smps_mode != sta->sta.smps_mode)
288 changed = true;
289 sta->sta.smps_mode = smps_mode;
290
291 return changed;
292 }
293
ieee80211_sta_tear_down_BA_sessions(struct sta_info * sta,enum ieee80211_agg_stop_reason reason)294 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
295 enum ieee80211_agg_stop_reason reason)
296 {
297 int i;
298
299 mutex_lock(&sta->ampdu_mlme.mtx);
300 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
301 ___ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
302 WLAN_REASON_QSTA_LEAVE_QBSS,
303 reason != AGG_STOP_DESTROY_STA &&
304 reason != AGG_STOP_PEER_REQUEST);
305
306 for (i = 0; i < IEEE80211_NUM_TIDS; i++)
307 ___ieee80211_stop_tx_ba_session(sta, i, reason);
308 mutex_unlock(&sta->ampdu_mlme.mtx);
309
310 /*
311 * In case the tear down is part of a reconfigure due to HW restart
312 * request, it is possible that the low level driver requested to stop
313 * the BA session, so handle it to properly clean tid_tx data.
314 */
315 if(reason == AGG_STOP_DESTROY_STA) {
316 cancel_work_sync(&sta->ampdu_mlme.work);
317
318 mutex_lock(&sta->ampdu_mlme.mtx);
319 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
320 struct tid_ampdu_tx *tid_tx =
321 rcu_dereference_protected_tid_tx(sta, i);
322
323 if (!tid_tx)
324 continue;
325
326 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
327 ieee80211_stop_tx_ba_cb(sta, i, tid_tx);
328 }
329 mutex_unlock(&sta->ampdu_mlme.mtx);
330 }
331 }
332
ieee80211_ba_session_work(struct work_struct * work)333 void ieee80211_ba_session_work(struct work_struct *work)
334 {
335 struct sta_info *sta =
336 container_of(work, struct sta_info, ampdu_mlme.work);
337 struct tid_ampdu_tx *tid_tx;
338 bool blocked;
339 int tid;
340
341 /* When this flag is set, new sessions should be blocked. */
342 blocked = test_sta_flag(sta, WLAN_STA_BLOCK_BA);
343
344 mutex_lock(&sta->ampdu_mlme.mtx);
345 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
346 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
347 ___ieee80211_stop_rx_ba_session(
348 sta, tid, WLAN_BACK_RECIPIENT,
349 WLAN_REASON_QSTA_TIMEOUT, true);
350
351 if (test_and_clear_bit(tid,
352 sta->ampdu_mlme.tid_rx_stop_requested))
353 ___ieee80211_stop_rx_ba_session(
354 sta, tid, WLAN_BACK_RECIPIENT,
355 WLAN_REASON_UNSPECIFIED, true);
356
357 if (!blocked &&
358 test_and_clear_bit(tid,
359 sta->ampdu_mlme.tid_rx_manage_offl))
360 ___ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid,
361 IEEE80211_MAX_AMPDU_BUF_HT,
362 false, true, NULL);
363
364 if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS,
365 sta->ampdu_mlme.tid_rx_manage_offl))
366 ___ieee80211_stop_rx_ba_session(
367 sta, tid, WLAN_BACK_RECIPIENT,
368 0, false);
369
370 spin_lock_bh(&sta->lock);
371
372 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
373 if (!blocked && tid_tx) {
374 /*
375 * Assign it over to the normal tid_tx array
376 * where it "goes live".
377 */
378
379 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
380 /* could there be a race? */
381 if (sta->ampdu_mlme.tid_tx[tid])
382 kfree(tid_tx);
383 else
384 ieee80211_assign_tid_tx(sta, tid, tid_tx);
385 spin_unlock_bh(&sta->lock);
386
387 ieee80211_tx_ba_session_handle_start(sta, tid);
388 continue;
389 }
390 spin_unlock_bh(&sta->lock);
391
392 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
393 if (!tid_tx)
394 continue;
395
396 if (!blocked &&
397 test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state))
398 ieee80211_start_tx_ba_cb(sta, tid, tid_tx);
399 if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state))
400 ___ieee80211_stop_tx_ba_session(sta, tid,
401 AGG_STOP_LOCAL_REQUEST);
402 if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state))
403 ieee80211_stop_tx_ba_cb(sta, tid, tid_tx);
404 }
405 mutex_unlock(&sta->ampdu_mlme.mtx);
406 }
407
ieee80211_send_delba(struct ieee80211_sub_if_data * sdata,const u8 * da,u16 tid,u16 initiator,u16 reason_code)408 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
409 const u8 *da, u16 tid,
410 u16 initiator, u16 reason_code)
411 {
412 struct ieee80211_local *local = sdata->local;
413 struct sk_buff *skb;
414 struct ieee80211_mgmt *mgmt;
415 u16 params;
416
417 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
418 if (!skb)
419 return;
420
421 skb_reserve(skb, local->hw.extra_tx_headroom);
422 mgmt = skb_put_zero(skb, 24);
423 memcpy(mgmt->da, da, ETH_ALEN);
424 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
425 if (sdata->vif.type == NL80211_IFTYPE_AP ||
426 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
427 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
428 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
429 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
430 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
431 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
432 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
433
434 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
435 IEEE80211_STYPE_ACTION);
436
437 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
438
439 mgmt->u.action.category = WLAN_CATEGORY_BACK;
440 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
441 params = (u16)(initiator << 11); /* bit 11 initiator */
442 params |= (u16)(tid << 12); /* bit 15:12 TID number */
443
444 mgmt->u.action.u.delba.params = cpu_to_le16(params);
445 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
446
447 ieee80211_tx_skb(sdata, skb);
448 }
449
ieee80211_process_delba(struct ieee80211_sub_if_data * sdata,struct sta_info * sta,struct ieee80211_mgmt * mgmt,size_t len)450 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
451 struct sta_info *sta,
452 struct ieee80211_mgmt *mgmt, size_t len)
453 {
454 u16 tid, params;
455 u16 initiator;
456
457 params = le16_to_cpu(mgmt->u.action.u.delba.params);
458 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
459 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
460
461 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
462 mgmt->sa, initiator ? "initiator" : "recipient",
463 tid,
464 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
465
466 if (initiator == WLAN_BACK_INITIATOR)
467 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
468 true);
469 else
470 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
471 }
472
473 enum nl80211_smps_mode
ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps)474 ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps)
475 {
476 switch (smps) {
477 case IEEE80211_SMPS_OFF:
478 return NL80211_SMPS_OFF;
479 case IEEE80211_SMPS_STATIC:
480 return NL80211_SMPS_STATIC;
481 case IEEE80211_SMPS_DYNAMIC:
482 return NL80211_SMPS_DYNAMIC;
483 default:
484 return NL80211_SMPS_OFF;
485 }
486 }
487
ieee80211_send_smps_action(struct ieee80211_sub_if_data * sdata,enum ieee80211_smps_mode smps,const u8 * da,const u8 * bssid)488 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
489 enum ieee80211_smps_mode smps, const u8 *da,
490 const u8 *bssid)
491 {
492 struct ieee80211_local *local = sdata->local;
493 struct sk_buff *skb;
494 struct ieee80211_mgmt *action_frame;
495
496 /* 27 = header + category + action + smps mode */
497 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
498 if (!skb)
499 return -ENOMEM;
500
501 skb_reserve(skb, local->hw.extra_tx_headroom);
502 action_frame = skb_put(skb, 27);
503 memcpy(action_frame->da, da, ETH_ALEN);
504 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
505 memcpy(action_frame->bssid, bssid, ETH_ALEN);
506 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
507 IEEE80211_STYPE_ACTION);
508 action_frame->u.action.category = WLAN_CATEGORY_HT;
509 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
510 switch (smps) {
511 case IEEE80211_SMPS_AUTOMATIC:
512 case IEEE80211_SMPS_NUM_MODES:
513 WARN_ON(1);
514 /* fall through */
515 case IEEE80211_SMPS_OFF:
516 action_frame->u.action.u.ht_smps.smps_control =
517 WLAN_HT_SMPS_CONTROL_DISABLED;
518 break;
519 case IEEE80211_SMPS_STATIC:
520 action_frame->u.action.u.ht_smps.smps_control =
521 WLAN_HT_SMPS_CONTROL_STATIC;
522 break;
523 case IEEE80211_SMPS_DYNAMIC:
524 action_frame->u.action.u.ht_smps.smps_control =
525 WLAN_HT_SMPS_CONTROL_DYNAMIC;
526 break;
527 }
528
529 /* we'll do more on status of this frame */
530 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
531 ieee80211_tx_skb(sdata, skb);
532
533 return 0;
534 }
535
ieee80211_request_smps_mgd_work(struct work_struct * work)536 void ieee80211_request_smps_mgd_work(struct work_struct *work)
537 {
538 struct ieee80211_sub_if_data *sdata =
539 container_of(work, struct ieee80211_sub_if_data,
540 u.mgd.request_smps_work);
541
542 sdata_lock(sdata);
543 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
544 sdata_unlock(sdata);
545 }
546
ieee80211_request_smps_ap_work(struct work_struct * work)547 void ieee80211_request_smps_ap_work(struct work_struct *work)
548 {
549 struct ieee80211_sub_if_data *sdata =
550 container_of(work, struct ieee80211_sub_if_data,
551 u.ap.request_smps_work);
552
553 sdata_lock(sdata);
554 if (sdata_dereference(sdata->u.ap.beacon, sdata))
555 __ieee80211_request_smps_ap(sdata,
556 sdata->u.ap.driver_smps_mode);
557 sdata_unlock(sdata);
558 }
559
ieee80211_request_smps(struct ieee80211_vif * vif,enum ieee80211_smps_mode smps_mode)560 void ieee80211_request_smps(struct ieee80211_vif *vif,
561 enum ieee80211_smps_mode smps_mode)
562 {
563 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
564
565 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION &&
566 vif->type != NL80211_IFTYPE_AP))
567 return;
568
569 if (vif->type == NL80211_IFTYPE_STATION) {
570 if (sdata->u.mgd.driver_smps_mode == smps_mode)
571 return;
572 sdata->u.mgd.driver_smps_mode = smps_mode;
573 ieee80211_queue_work(&sdata->local->hw,
574 &sdata->u.mgd.request_smps_work);
575 } else {
576 /* AUTOMATIC is meaningless in AP mode */
577 if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC))
578 return;
579 if (sdata->u.ap.driver_smps_mode == smps_mode)
580 return;
581 sdata->u.ap.driver_smps_mode = smps_mode;
582 ieee80211_queue_work(&sdata->local->hw,
583 &sdata->u.ap.request_smps_work);
584 }
585 }
586 /* this might change ... don't want non-open drivers using it */
587 EXPORT_SYMBOL_GPL(ieee80211_request_smps);
588
