Commit | Line | Data |
---|---|---|
44d414db JB |
1 | /* |
2 | * HT handling | |
3 | * | |
4 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
bacac545 JB |
5 | * Copyright 2002-2005, Instant802 Networks, Inc. |
6 | * Copyright 2005-2006, Devicescape Software, Inc. | |
44d414db JB |
7 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> |
8 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
cfcdbde3 | 9 | * Copyright 2007-2010, Intel Corporation |
44d414db JB |
10 | * |
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> | |
bc3b2d7f | 17 | #include <linux/export.h> |
44d414db JB |
18 | #include <net/mac80211.h> |
19 | #include "ieee80211_i.h" | |
81cb7623 | 20 | #include "rate.h" |
44d414db | 21 | |
32dfefac BG |
22 | static void __check_htcap_disable(struct ieee80211_sub_if_data *sdata, |
23 | struct ieee80211_sta_ht_cap *ht_cap, | |
24 | u16 flag) | |
ef96a842 BG |
25 | { |
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 | ||
33 | void 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 | ||
e1a0c6b3 JB |
40 | if (!ht_cap->ht_supported) |
41 | return; | |
42 | ||
ef96a842 BG |
43 | /* NOTE: If you add more over-rides here, update register_hw |
44 | * ht_capa_mod_msk logic in main.c as well. | |
45 | * And, if this method can ever change ht_cap.ht_supported, fix | |
46 | * the check in ieee80211_add_ht_ie. | |
47 | */ | |
48 | ||
49 | /* check for HT over-rides, MCS rates first. */ | |
50 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { | |
51 | u8 m = smask[i]; | |
52 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ | |
53 | /* Add back rates that are supported */ | |
54 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); | |
55 | } | |
56 | ||
57 | /* Force removal of HT-40 capabilities? */ | |
58 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
59 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40); | |
60 | ||
bc0784d9 BG |
61 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
62 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_20); | |
63 | ||
ef96a842 BG |
64 | /* Allow user to disable the max-AMSDU bit. */ |
65 | __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU); | |
66 | ||
67 | /* Allow user to decrease AMPDU factor */ | |
68 | if (sdata->u.mgd.ht_capa_mask.ampdu_params_info & | |
69 | IEEE80211_HT_AMPDU_PARM_FACTOR) { | |
70 | u8 n = sdata->u.mgd.ht_capa.ampdu_params_info | |
71 | & IEEE80211_HT_AMPDU_PARM_FACTOR; | |
72 | if (n < ht_cap->ampdu_factor) | |
73 | ht_cap->ampdu_factor = n; | |
74 | } | |
75 | ||
76 | /* Allow the user to increase AMPDU density. */ | |
77 | if (sdata->u.mgd.ht_capa_mask.ampdu_params_info & | |
78 | IEEE80211_HT_AMPDU_PARM_DENSITY) { | |
79 | u8 n = (sdata->u.mgd.ht_capa.ampdu_params_info & | |
80 | IEEE80211_HT_AMPDU_PARM_DENSITY) | |
81 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; | |
82 | if (n > ht_cap->ampdu_density) | |
83 | ht_cap->ampdu_density = n; | |
84 | } | |
85 | } | |
86 | ||
87 | ||
e1a0c6b3 | 88 | bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
ef96a842 | 89 | struct ieee80211_supported_band *sband, |
4a3cb702 | 90 | const struct ieee80211_ht_cap *ht_cap_ie, |
e1a0c6b3 | 91 | struct sta_info *sta) |
44d414db | 92 | { |
c07270b6 | 93 | struct ieee80211_sta_ht_cap ht_cap, own_cap; |
ae5eb026 JB |
94 | u8 ampdu_info, tx_mcs_set_cap; |
95 | int i, max_tx_streams; | |
e1a0c6b3 JB |
96 | bool changed; |
97 | enum ieee80211_sta_rx_bandwidth bw; | |
af0ed69b | 98 | enum ieee80211_smps_mode smps_mode; |
44d414db | 99 | |
e1a0c6b3 | 100 | memset(&ht_cap, 0, sizeof(ht_cap)); |
44d414db | 101 | |
15804e3e | 102 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
e1a0c6b3 | 103 | goto apply; |
d9fe60de | 104 | |
e1a0c6b3 | 105 | ht_cap.ht_supported = true; |
d9fe60de | 106 | |
c07270b6 JB |
107 | own_cap = sband->ht_cap; |
108 | ||
109 | /* | |
110 | * If user has specified capability over-rides, take care | |
111 | * of that if the station we're setting up is the AP that | |
112 | * we advertised a restricted capability set to. Override | |
113 | * our own capabilities and then use those below. | |
114 | */ | |
115 | if (sdata->vif.type == NL80211_IFTYPE_STATION && | |
116 | !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) | |
117 | ieee80211_apply_htcap_overrides(sdata, &own_cap); | |
118 | ||
9a418af5 JB |
119 | /* |
120 | * The bits listed in this expression should be | |
121 | * the same for the peer and us, if the station | |
122 | * advertises more then we can't use those thus | |
123 | * we mask them out. | |
124 | */ | |
e1a0c6b3 | 125 | ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & |
c07270b6 JB |
126 | (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | |
127 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | | |
128 | IEEE80211_HT_CAP_GRN_FLD | | |
129 | IEEE80211_HT_CAP_SGI_20 | | |
130 | IEEE80211_HT_CAP_SGI_40 | | |
131 | IEEE80211_HT_CAP_DSSSCCK40)); | |
21add825 | 132 | |
9a418af5 JB |
133 | /* |
134 | * The STBC bits are asymmetric -- if we don't have | |
135 | * TX then mask out the peer's RX and vice versa. | |
136 | */ | |
c07270b6 | 137 | if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
e1a0c6b3 | 138 | ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; |
c07270b6 | 139 | if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
e1a0c6b3 | 140 | ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; |
d9fe60de | 141 | |
ae5eb026 | 142 | ampdu_info = ht_cap_ie->ampdu_params_info; |
e1a0c6b3 | 143 | ht_cap.ampdu_factor = |
ae5eb026 | 144 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
e1a0c6b3 | 145 | ht_cap.ampdu_density = |
ae5eb026 | 146 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
44d414db | 147 | |
d9fe60de | 148 | /* own MCS TX capabilities */ |
c07270b6 | 149 | tx_mcs_set_cap = own_cap.mcs.tx_params; |
d9fe60de | 150 | |
90b4ca9d | 151 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
e1a0c6b3 | 152 | ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; |
90b4ca9d | 153 | |
d9fe60de JB |
154 | /* can we TX with MCS rates? */ |
155 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) | |
e1a0c6b3 | 156 | goto apply; |
d9fe60de JB |
157 | |
158 | /* Counting from 0, therefore +1 */ | |
159 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) | |
160 | max_tx_streams = | |
161 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
162 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
163 | else | |
164 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; | |
165 | ||
166 | /* | |
90b4ca9d | 167 | * 802.11n-2009 20.3.5 / 20.6 says: |
d9fe60de JB |
168 | * - indices 0 to 7 and 32 are single spatial stream |
169 | * - 8 to 31 are multiple spatial streams using equal modulation | |
170 | * [8..15 for two streams, 16..23 for three and 24..31 for four] | |
171 | * - remainder are multiple spatial streams using unequal modulation | |
172 | */ | |
173 | for (i = 0; i < max_tx_streams; i++) | |
e1a0c6b3 | 174 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 175 | own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
176 | |
177 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) | |
178 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; | |
179 | i < IEEE80211_HT_MCS_MASK_LEN; i++) | |
e1a0c6b3 | 180 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 181 | own_cap.mcs.rx_mask[i] & |
ae5eb026 | 182 | ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
183 | |
184 | /* handle MCS rate 32 too */ | |
c07270b6 | 185 | if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
e1a0c6b3 | 186 | ht_cap.mcs.rx_mask[32/8] |= 1; |
ef96a842 | 187 | |
e1a0c6b3 | 188 | apply: |
e1a0c6b3 JB |
189 | changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
190 | ||
191 | memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); | |
192 | ||
193 | switch (sdata->vif.bss_conf.chandef.width) { | |
194 | default: | |
195 | WARN_ON_ONCE(1); | |
196 | /* fall through */ | |
197 | case NL80211_CHAN_WIDTH_20_NOHT: | |
198 | case NL80211_CHAN_WIDTH_20: | |
199 | bw = IEEE80211_STA_RX_BW_20; | |
200 | break; | |
201 | case NL80211_CHAN_WIDTH_40: | |
202 | case NL80211_CHAN_WIDTH_80: | |
203 | case NL80211_CHAN_WIDTH_80P80: | |
204 | case NL80211_CHAN_WIDTH_160: | |
205 | bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
206 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
207 | break; | |
208 | } | |
209 | ||
210 | if (bw != sta->sta.bandwidth) | |
211 | changed = true; | |
212 | sta->sta.bandwidth = bw; | |
213 | ||
0af83d3d JB |
214 | sta->cur_max_bandwidth = |
215 | ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
216 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
217 | ||
af0ed69b JB |
218 | switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) |
219 | >> IEEE80211_HT_CAP_SM_PS_SHIFT) { | |
220 | case WLAN_HT_CAP_SM_PS_INVALID: | |
221 | case WLAN_HT_CAP_SM_PS_STATIC: | |
222 | smps_mode = IEEE80211_SMPS_STATIC; | |
223 | break; | |
224 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | |
225 | smps_mode = IEEE80211_SMPS_DYNAMIC; | |
226 | break; | |
227 | case WLAN_HT_CAP_SM_PS_DISABLED: | |
228 | smps_mode = IEEE80211_SMPS_OFF; | |
229 | break; | |
230 | } | |
231 | ||
232 | if (smps_mode != sta->sta.smps_mode) | |
233 | changed = true; | |
234 | sta->sta.smps_mode = smps_mode; | |
235 | ||
e1a0c6b3 | 236 | return changed; |
ae5eb026 JB |
237 | } |
238 | ||
c82c4a80 JB |
239 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, |
240 | enum ieee80211_agg_stop_reason reason) | |
de1ede7a | 241 | { |
b8695a8f | 242 | int i; |
de1ede7a | 243 | |
0ab33703 JB |
244 | cancel_work_sync(&sta->ampdu_mlme.work); |
245 | ||
5a306f58 | 246 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
c82c4a80 | 247 | __ieee80211_stop_tx_ba_session(sta, i, reason); |
849b7967 | 248 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
c82c4a80 JB |
249 | WLAN_REASON_QSTA_LEAVE_QBSS, |
250 | reason != AGG_STOP_DESTROY_STA && | |
251 | reason != AGG_STOP_PEER_REQUEST); | |
de1ede7a | 252 | } |
de1ede7a JB |
253 | } |
254 | ||
67c282c0 JB |
255 | void ieee80211_ba_session_work(struct work_struct *work) |
256 | { | |
257 | struct sta_info *sta = | |
258 | container_of(work, struct sta_info, ampdu_mlme.work); | |
259 | struct tid_ampdu_tx *tid_tx; | |
260 | int tid; | |
261 | ||
262 | /* | |
263 | * When this flag is set, new sessions should be | |
264 | * blocked, and existing sessions will be torn | |
265 | * down by the code that set the flag, so this | |
266 | * need not run. | |
267 | */ | |
c2c98fde | 268 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
67c282c0 JB |
269 | return; |
270 | ||
a93e3644 | 271 | mutex_lock(&sta->ampdu_mlme.mtx); |
5a306f58 | 272 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
7c3b1dd8 JB |
273 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
274 | ___ieee80211_stop_rx_ba_session( | |
275 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 | 276 | WLAN_REASON_QSTA_TIMEOUT, true); |
7c3b1dd8 | 277 | |
f41ccd71 SL |
278 | if (test_and_clear_bit(tid, |
279 | sta->ampdu_mlme.tid_rx_stop_requested)) | |
280 | ___ieee80211_stop_rx_ba_session( | |
281 | sta, tid, WLAN_BACK_RECIPIENT, | |
282 | WLAN_REASON_UNSPECIFIED, true); | |
283 | ||
ec034b20 JB |
284 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
285 | if (tid_tx) { | |
286 | /* | |
287 | * Assign it over to the normal tid_tx array | |
288 | * where it "goes live". | |
289 | */ | |
290 | spin_lock_bh(&sta->lock); | |
291 | ||
292 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; | |
293 | /* could there be a race? */ | |
294 | if (sta->ampdu_mlme.tid_tx[tid]) | |
295 | kfree(tid_tx); | |
296 | else | |
297 | ieee80211_assign_tid_tx(sta, tid, tid_tx); | |
298 | spin_unlock_bh(&sta->lock); | |
67c282c0 | 299 | |
67c282c0 | 300 | ieee80211_tx_ba_session_handle_start(sta, tid); |
ec034b20 JB |
301 | continue; |
302 | } | |
303 | ||
40b275b6 | 304 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
ec034b20 JB |
305 | if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP, |
306 | &tid_tx->state)) | |
67c282c0 | 307 | ___ieee80211_stop_tx_ba_session(sta, tid, |
c82c4a80 | 308 | AGG_STOP_LOCAL_REQUEST); |
67c282c0 | 309 | } |
cfcdbde3 | 310 | mutex_unlock(&sta->ampdu_mlme.mtx); |
67c282c0 JB |
311 | } |
312 | ||
b8695a8f JB |
313 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
314 | const u8 *da, u16 tid, | |
315 | u16 initiator, u16 reason_code) | |
44d414db JB |
316 | { |
317 | struct ieee80211_local *local = sdata->local; | |
44d414db JB |
318 | struct sk_buff *skb; |
319 | struct ieee80211_mgmt *mgmt; | |
320 | u16 params; | |
321 | ||
322 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 323 | if (!skb) |
44d414db | 324 | return; |
44d414db JB |
325 | |
326 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
327 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
328 | memset(mgmt, 0, 24); | |
329 | memcpy(mgmt->da, da, ETH_ALEN); | |
47846c9b | 330 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 331 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
332 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
333 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 334 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
335 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
336 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
337 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
338 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 339 | |
44d414db JB |
340 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
341 | IEEE80211_STYPE_ACTION); | |
342 | ||
343 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
344 | ||
345 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
346 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
347 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
348 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
349 | ||
350 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
351 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
352 | ||
cf6bb79a | 353 | ieee80211_tx_skb_tid(sdata, skb, tid); |
44d414db JB |
354 | } |
355 | ||
de1ede7a JB |
356 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
357 | struct sta_info *sta, | |
358 | struct ieee80211_mgmt *mgmt, size_t len) | |
359 | { | |
de1ede7a JB |
360 | u16 tid, params; |
361 | u16 initiator; | |
de1ede7a JB |
362 | |
363 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
364 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
365 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
366 | ||
bdcbd8e0 JB |
367 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
368 | mgmt->sa, initiator ? "initiator" : "recipient", | |
369 | tid, | |
370 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); | |
de1ede7a JB |
371 | |
372 | if (initiator == WLAN_BACK_INITIATOR) | |
53f73c09 JB |
373 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
374 | true); | |
a622ab72 | 375 | else |
c82c4a80 | 376 | __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); |
de1ede7a | 377 | } |
0f78231b JB |
378 | |
379 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, | |
380 | enum ieee80211_smps_mode smps, const u8 *da, | |
381 | const u8 *bssid) | |
382 | { | |
383 | struct ieee80211_local *local = sdata->local; | |
384 | struct sk_buff *skb; | |
385 | struct ieee80211_mgmt *action_frame; | |
386 | ||
387 | /* 27 = header + category + action + smps mode */ | |
388 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); | |
389 | if (!skb) | |
390 | return -ENOMEM; | |
391 | ||
392 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
393 | action_frame = (void *)skb_put(skb, 27); | |
394 | memcpy(action_frame->da, da, ETH_ALEN); | |
395 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); | |
396 | memcpy(action_frame->bssid, bssid, ETH_ALEN); | |
397 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
398 | IEEE80211_STYPE_ACTION); | |
399 | action_frame->u.action.category = WLAN_CATEGORY_HT; | |
400 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; | |
401 | switch (smps) { | |
402 | case IEEE80211_SMPS_AUTOMATIC: | |
403 | case IEEE80211_SMPS_NUM_MODES: | |
404 | WARN_ON(1); | |
405 | case IEEE80211_SMPS_OFF: | |
406 | action_frame->u.action.u.ht_smps.smps_control = | |
407 | WLAN_HT_SMPS_CONTROL_DISABLED; | |
408 | break; | |
409 | case IEEE80211_SMPS_STATIC: | |
410 | action_frame->u.action.u.ht_smps.smps_control = | |
411 | WLAN_HT_SMPS_CONTROL_STATIC; | |
412 | break; | |
413 | case IEEE80211_SMPS_DYNAMIC: | |
414 | action_frame->u.action.u.ht_smps.smps_control = | |
415 | WLAN_HT_SMPS_CONTROL_DYNAMIC; | |
416 | break; | |
417 | } | |
418 | ||
419 | /* we'll do more on status of this frame */ | |
420 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
421 | ieee80211_tx_skb(sdata, skb); | |
422 | ||
423 | return 0; | |
424 | } | |
d1f5b7a3 JB |
425 | |
426 | void ieee80211_request_smps_work(struct work_struct *work) | |
427 | { | |
428 | struct ieee80211_sub_if_data *sdata = | |
429 | container_of(work, struct ieee80211_sub_if_data, | |
430 | u.mgd.request_smps_work); | |
431 | ||
432 | mutex_lock(&sdata->u.mgd.mtx); | |
433 | __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode); | |
434 | mutex_unlock(&sdata->u.mgd.mtx); | |
435 | } | |
436 | ||
437 | void ieee80211_request_smps(struct ieee80211_vif *vif, | |
438 | enum ieee80211_smps_mode smps_mode) | |
439 | { | |
440 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
441 | ||
442 | if (WARN_ON(vif->type != NL80211_IFTYPE_STATION)) | |
443 | return; | |
444 | ||
445 | if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF)) | |
446 | smps_mode = IEEE80211_SMPS_AUTOMATIC; | |
447 | ||
66d57570 EG |
448 | if (sdata->u.mgd.driver_smps_mode == smps_mode) |
449 | return; | |
450 | ||
e4b55957 JB |
451 | sdata->u.mgd.driver_smps_mode = smps_mode; |
452 | ||
d1f5b7a3 JB |
453 | ieee80211_queue_work(&sdata->local->hw, |
454 | &sdata->u.mgd.request_smps_work); | |
455 | } | |
456 | /* this might change ... don't want non-open drivers using it */ | |
457 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |