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Johannes Berg44d414d2008-09-08 17:44:28 +02001/*
2 * HT handling
3 *
4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
Johannes Bergbacac542008-09-08 17:44:29 +02005 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
Johannes Berg44d414d2008-09-08 17:44:28 +02007 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
Johannes Bergcfcdbde2010-06-10 10:21:48 +02009 * Copyright 2007-2010, Intel Corporation
Johannes Berg44d414d2008-09-08 17:44:28 +020010 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#include <linux/ieee80211.h>
Paul Gortmakerbc3b2d72011-07-15 11:47:34 -040017#include <linux/export.h>
Johannes Berg44d414d2008-09-08 17:44:28 +020018#include <net/mac80211.h>
19#include "ieee80211_i.h"
Sujith81cb7622009-02-12 11:38:37 +053020#include "rate.h"
Johannes Berg44d414d2008-09-08 17:44:28 +020021
Ben Greear32dfefa2011-11-24 11:15:21 -080022static void __check_htcap_disable(struct ieee80211_sub_if_data *sdata,
23 struct ieee80211_sta_ht_cap *ht_cap,
24 u16 flag)
Ben Greearef96a8422011-11-18 11:32:00 -080025{
26 __le16 le_flag = cpu_to_le16(flag);
27 if (sdata->u.mgd.ht_capa_mask.cap_info & le_flag) {
28 if (!(sdata->u.mgd.ht_capa.cap_info & le_flag))
29 ht_cap->cap &= ~flag;
30 }
31}
32
33void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
34 struct ieee80211_sta_ht_cap *ht_cap)
35{
36 u8 *scaps = (u8 *)(&sdata->u.mgd.ht_capa.mcs.rx_mask);
37 u8 *smask = (u8 *)(&sdata->u.mgd.ht_capa_mask.mcs.rx_mask);
38 int i;
39
40 if (sdata->vif.type != NL80211_IFTYPE_STATION) {
Ben Greear4e79fad2011-12-05 11:15:55 -080041 /* AP interfaces call this code when adding new stations,
42 * so just silently ignore non station interfaces.
43 */
Ben Greearef96a8422011-11-18 11:32:00 -080044 return;
45 }
46
47 /* NOTE: If you add more over-rides here, update register_hw
48 * ht_capa_mod_msk logic in main.c as well.
49 * And, if this method can ever change ht_cap.ht_supported, fix
50 * the check in ieee80211_add_ht_ie.
51 */
52
53 /* check for HT over-rides, MCS rates first. */
54 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
55 u8 m = smask[i];
56 ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */
57 /* Add back rates that are supported */
58 ht_cap->mcs.rx_mask[i] |= (m & scaps[i]);
59 }
60
61 /* Force removal of HT-40 capabilities? */
62 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40);
63 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40);
64
65 /* Allow user to disable the max-AMSDU bit. */
66 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU);
67
68 /* Allow user to decrease AMPDU factor */
69 if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
70 IEEE80211_HT_AMPDU_PARM_FACTOR) {
71 u8 n = sdata->u.mgd.ht_capa.ampdu_params_info
72 & IEEE80211_HT_AMPDU_PARM_FACTOR;
73 if (n < ht_cap->ampdu_factor)
74 ht_cap->ampdu_factor = n;
75 }
76
77 /* Allow the user to increase AMPDU density. */
78 if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
79 IEEE80211_HT_AMPDU_PARM_DENSITY) {
80 u8 n = (sdata->u.mgd.ht_capa.ampdu_params_info &
81 IEEE80211_HT_AMPDU_PARM_DENSITY)
82 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
83 if (n > ht_cap->ampdu_density)
84 ht_cap->ampdu_density = n;
85 }
86}
87
88
89void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
90 struct ieee80211_supported_band *sband,
Johannes Bergae5eb022008-10-14 16:58:37 +020091 struct ieee80211_ht_cap *ht_cap_ie,
Johannes Bergd9fe60d2008-10-09 12:13:49 +020092 struct ieee80211_sta_ht_cap *ht_cap)
Johannes Berg44d414d2008-09-08 17:44:28 +020093{
Johannes Bergae5eb022008-10-14 16:58:37 +020094 u8 ampdu_info, tx_mcs_set_cap;
95 int i, max_tx_streams;
Johannes Berg44d414d2008-09-08 17:44:28 +020096
Johannes Bergd9fe60d2008-10-09 12:13:49 +020097 BUG_ON(!ht_cap);
Johannes Berg44d414d2008-09-08 17:44:28 +020098
Johannes Bergd9fe60d2008-10-09 12:13:49 +020099 memset(ht_cap, 0, sizeof(*ht_cap));
Johannes Berg44d414d2008-09-08 17:44:28 +0200100
Christian Lamparter15804e32010-07-16 13:01:24 +0200101 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
Johannes Bergae5eb022008-10-14 16:58:37 +0200102 return;
Johannes Berg44d414d2008-09-08 17:44:28 +0200103
Johannes Bergae5eb022008-10-14 16:58:37 +0200104 ht_cap->ht_supported = true;
Johannes Berg44d414d2008-09-08 17:44:28 +0200105
Johannes Berg9a418af2009-12-17 13:55:48 +0100106 /*
107 * The bits listed in this expression should be
108 * the same for the peer and us, if the station
109 * advertises more then we can't use those thus
110 * we mask them out.
111 */
112 ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
113 (sband->ht_cap.cap |
114 ~(IEEE80211_HT_CAP_LDPC_CODING |
115 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
116 IEEE80211_HT_CAP_GRN_FLD |
117 IEEE80211_HT_CAP_SGI_20 |
118 IEEE80211_HT_CAP_SGI_40 |
119 IEEE80211_HT_CAP_DSSSCCK40));
120 /*
121 * The STBC bits are asymmetric -- if we don't have
122 * TX then mask out the peer's RX and vice versa.
123 */
124 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
125 ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
126 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
127 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
Johannes Berg44d414d2008-09-08 17:44:28 +0200128
Johannes Bergae5eb022008-10-14 16:58:37 +0200129 ampdu_info = ht_cap_ie->ampdu_params_info;
130 ht_cap->ampdu_factor =
131 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
132 ht_cap->ampdu_density =
133 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200134
135 /* own MCS TX capabilities */
136 tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;
137
Johannes Berg90b4ca92011-02-25 12:24:10 +0100138 /* Copy peer MCS TX capabilities, the driver might need them. */
139 ht_cap->mcs.tx_params = ht_cap_ie->mcs.tx_params;
140
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200141 /* can we TX with MCS rates? */
142 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
Johannes Bergae5eb022008-10-14 16:58:37 +0200143 return;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200144
145 /* Counting from 0, therefore +1 */
146 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
147 max_tx_streams =
148 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
149 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
150 else
151 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
152
153 /*
Johannes Berg90b4ca92011-02-25 12:24:10 +0100154 * 802.11n-2009 20.3.5 / 20.6 says:
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200155 * - indices 0 to 7 and 32 are single spatial stream
156 * - 8 to 31 are multiple spatial streams using equal modulation
157 * [8..15 for two streams, 16..23 for three and 24..31 for four]
158 * - remainder are multiple spatial streams using unequal modulation
159 */
160 for (i = 0; i < max_tx_streams; i++)
Johannes Bergae5eb022008-10-14 16:58:37 +0200161 ht_cap->mcs.rx_mask[i] =
162 sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200163
164 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
165 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
166 i < IEEE80211_HT_MCS_MASK_LEN; i++)
Johannes Bergae5eb022008-10-14 16:58:37 +0200167 ht_cap->mcs.rx_mask[i] =
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200168 sband->ht_cap.mcs.rx_mask[i] &
Johannes Bergae5eb022008-10-14 16:58:37 +0200169 ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200170
171 /* handle MCS rate 32 too */
Johannes Bergae5eb022008-10-14 16:58:37 +0200172 if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
173 ht_cap->mcs.rx_mask[32/8] |= 1;
Ben Greearef96a8422011-11-18 11:32:00 -0800174
175 /*
176 * If user has specified capability over-rides, take care
177 * of that here.
178 */
179 ieee80211_apply_htcap_overrides(sdata, ht_cap);
Johannes Bergae5eb022008-10-14 16:58:37 +0200180}
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200181
Johannes Berg53f73c02010-10-05 19:37:40 +0200182void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
Johannes Berg44d414d2008-09-08 17:44:28 +0200183{
Johannes Bergb8695a82009-02-10 21:25:46 +0100184 int i;
Johannes Berg44d414d2008-09-08 17:44:28 +0200185
Johannes Berg0ab33702010-06-10 10:21:42 +0200186 cancel_work_sync(&sta->ampdu_mlme.work);
187
Johannes Berg5a306f52012-11-14 23:22:21 +0100188 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
Johannes Berg53f73c02010-10-05 19:37:40 +0200189 __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
Johannes Berg849b7962009-02-10 21:25:54 +0100190 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +0200191 WLAN_REASON_QSTA_LEAVE_QBSS, tx);
Johannes Berg44d414d2008-09-08 17:44:28 +0200192 }
Johannes Berg44d414d2008-09-08 17:44:28 +0200193}
194
Johannes Berg67c282c2010-06-10 10:21:43 +0200195void ieee80211_ba_session_work(struct work_struct *work)
196{
197 struct sta_info *sta =
198 container_of(work, struct sta_info, ampdu_mlme.work);
199 struct tid_ampdu_tx *tid_tx;
200 int tid;
201
202 /*
203 * When this flag is set, new sessions should be
204 * blocked, and existing sessions will be torn
205 * down by the code that set the flag, so this
206 * need not run.
207 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200208 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
Johannes Berg67c282c2010-06-10 10:21:43 +0200209 return;
210
Johannes Berga93e3642010-06-10 10:21:46 +0200211 mutex_lock(&sta->ampdu_mlme.mtx);
Johannes Berg5a306f52012-11-14 23:22:21 +0100212 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200213 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
214 ___ieee80211_stop_rx_ba_session(
215 sta, tid, WLAN_BACK_RECIPIENT,
Johannes Berg53f73c02010-10-05 19:37:40 +0200216 WLAN_REASON_QSTA_TIMEOUT, true);
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200217
Shahar Levif41ccd72011-05-22 16:10:21 +0300218 if (test_and_clear_bit(tid,
219 sta->ampdu_mlme.tid_rx_stop_requested))
220 ___ieee80211_stop_rx_ba_session(
221 sta, tid, WLAN_BACK_RECIPIENT,
222 WLAN_REASON_UNSPECIFIED, true);
223
Johannes Bergec034b22011-05-13 13:35:40 +0200224 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
225 if (tid_tx) {
226 /*
227 * Assign it over to the normal tid_tx array
228 * where it "goes live".
229 */
230 spin_lock_bh(&sta->lock);
Johannes Berg67c282c2010-06-10 10:21:43 +0200231
Johannes Bergec034b22011-05-13 13:35:40 +0200232 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
233 /* could there be a race? */
234 if (sta->ampdu_mlme.tid_tx[tid])
235 kfree(tid_tx);
236 else
237 ieee80211_assign_tid_tx(sta, tid, tid_tx);
238 spin_unlock_bh(&sta->lock);
239
Johannes Berg67c282c2010-06-10 10:21:43 +0200240 ieee80211_tx_ba_session_handle_start(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200241 continue;
242 }
243
Johannes Berg40b275b2011-05-13 14:15:49 +0200244 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200245 if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
246 &tid_tx->state))
Johannes Berg67c282c2010-06-10 10:21:43 +0200247 ___ieee80211_stop_tx_ba_session(sta, tid,
Johannes Berg53f73c02010-10-05 19:37:40 +0200248 WLAN_BACK_INITIATOR,
249 true);
Johannes Berg67c282c2010-06-10 10:21:43 +0200250 }
Johannes Bergcfcdbde2010-06-10 10:21:48 +0200251 mutex_unlock(&sta->ampdu_mlme.mtx);
Johannes Berg67c282c2010-06-10 10:21:43 +0200252}
253
Johannes Bergb8695a82009-02-10 21:25:46 +0100254void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
255 const u8 *da, u16 tid,
256 u16 initiator, u16 reason_code)
Johannes Berg44d414d2008-09-08 17:44:28 +0200257{
258 struct ieee80211_local *local = sdata->local;
Johannes Berg44d414d2008-09-08 17:44:28 +0200259 struct sk_buff *skb;
260 struct ieee80211_mgmt *mgmt;
261 u16 params;
262
263 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
Joe Perchesd15b8452011-08-29 14:17:31 -0700264 if (!skb)
Johannes Berg44d414d2008-09-08 17:44:28 +0200265 return;
Johannes Berg44d414d2008-09-08 17:44:28 +0200266
267 skb_reserve(skb, local->hw.extra_tx_headroom);
268 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
269 memset(mgmt, 0, 24);
270 memcpy(mgmt->da, da, ETH_ALEN);
Johannes Berg47846c92009-11-25 17:46:19 +0100271 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg8abd3f92009-02-10 21:25:47 +0100272 if (sdata->vif.type == NL80211_IFTYPE_AP ||
Thomas Pedersenae2772b2011-10-26 14:47:29 -0700273 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
274 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Johannes Berg47846c92009-11-25 17:46:19 +0100275 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100276 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
277 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
Alexander Simon13c40c52011-11-30 16:56:34 +0100278 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
279 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100280
Johannes Berg44d414d2008-09-08 17:44:28 +0200281 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
282 IEEE80211_STYPE_ACTION);
283
284 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
285
286 mgmt->u.action.category = WLAN_CATEGORY_BACK;
287 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
288 params = (u16)(initiator << 11); /* bit 11 initiator */
289 params |= (u16)(tid << 12); /* bit 15:12 TID number */
290
291 mgmt->u.action.u.delba.params = cpu_to_le16(params);
292 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
293
Helmut Schaacf6bb792011-12-15 10:18:34 +0100294 ieee80211_tx_skb_tid(sdata, skb, tid);
Johannes Berg44d414d2008-09-08 17:44:28 +0200295}
296
Johannes Bergde1ede72008-09-09 14:42:50 +0200297void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
298 struct sta_info *sta,
299 struct ieee80211_mgmt *mgmt, size_t len)
300{
Johannes Bergde1ede72008-09-09 14:42:50 +0200301 u16 tid, params;
302 u16 initiator;
Johannes Bergde1ede72008-09-09 14:42:50 +0200303
304 params = le16_to_cpu(mgmt->u.action.u.delba.params);
305 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
306 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
307
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200308 ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n",
309 mgmt->sa, initiator ? "initiator" : "recipient",
310 tid,
311 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
Johannes Bergde1ede72008-09-09 14:42:50 +0200312
313 if (initiator == WLAN_BACK_INITIATOR)
Johannes Berg53f73c02010-10-05 19:37:40 +0200314 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
315 true);
Johannes Berga622ab72010-06-10 10:21:39 +0200316 else
Johannes Berg53f73c02010-10-05 19:37:40 +0200317 __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
318 true);
Johannes Bergde1ede72008-09-09 14:42:50 +0200319}
Johannes Berg0f782312009-12-01 13:37:02 +0100320
321int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
322 enum ieee80211_smps_mode smps, const u8 *da,
323 const u8 *bssid)
324{
325 struct ieee80211_local *local = sdata->local;
326 struct sk_buff *skb;
327 struct ieee80211_mgmt *action_frame;
328
329 /* 27 = header + category + action + smps mode */
330 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
331 if (!skb)
332 return -ENOMEM;
333
334 skb_reserve(skb, local->hw.extra_tx_headroom);
335 action_frame = (void *)skb_put(skb, 27);
336 memcpy(action_frame->da, da, ETH_ALEN);
337 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
338 memcpy(action_frame->bssid, bssid, ETH_ALEN);
339 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
340 IEEE80211_STYPE_ACTION);
341 action_frame->u.action.category = WLAN_CATEGORY_HT;
342 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
343 switch (smps) {
344 case IEEE80211_SMPS_AUTOMATIC:
345 case IEEE80211_SMPS_NUM_MODES:
346 WARN_ON(1);
347 case IEEE80211_SMPS_OFF:
348 action_frame->u.action.u.ht_smps.smps_control =
349 WLAN_HT_SMPS_CONTROL_DISABLED;
350 break;
351 case IEEE80211_SMPS_STATIC:
352 action_frame->u.action.u.ht_smps.smps_control =
353 WLAN_HT_SMPS_CONTROL_STATIC;
354 break;
355 case IEEE80211_SMPS_DYNAMIC:
356 action_frame->u.action.u.ht_smps.smps_control =
357 WLAN_HT_SMPS_CONTROL_DYNAMIC;
358 break;
359 }
360
361 /* we'll do more on status of this frame */
362 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
363 ieee80211_tx_skb(sdata, skb);
364
365 return 0;
366}
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200367
368void ieee80211_request_smps_work(struct work_struct *work)
369{
370 struct ieee80211_sub_if_data *sdata =
371 container_of(work, struct ieee80211_sub_if_data,
372 u.mgd.request_smps_work);
373
374 mutex_lock(&sdata->u.mgd.mtx);
375 __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
376 mutex_unlock(&sdata->u.mgd.mtx);
377}
378
379void ieee80211_request_smps(struct ieee80211_vif *vif,
380 enum ieee80211_smps_mode smps_mode)
381{
382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
383
384 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
385 return;
386
387 if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
388 smps_mode = IEEE80211_SMPS_AUTOMATIC;
389
Johannes Berge4b55952010-10-13 19:23:21 +0200390 sdata->u.mgd.driver_smps_mode = smps_mode;
391
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200392 ieee80211_queue_work(&sdata->local->hw,
393 &sdata->u.mgd.request_smps_work);
394}
395/* this might change ... don't want non-open drivers using it */
396EXPORT_SYMBOL_GPL(ieee80211_request_smps);