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Commit | Line | Data |
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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 | |
822854b0 SW |
22 | static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, |
23 | struct ieee80211_ht_cap *ht_capa_mask, | |
32dfefac BG |
24 | struct ieee80211_sta_ht_cap *ht_cap, |
25 | u16 flag) | |
ef96a842 BG |
26 | { |
27 | __le16 le_flag = cpu_to_le16(flag); | |
822854b0 SW |
28 | if (ht_capa_mask->cap_info & le_flag) { |
29 | if (!(ht_capa->cap_info & le_flag)) | |
ef96a842 BG |
30 | ht_cap->cap &= ~flag; |
31 | } | |
32 | } | |
33 | ||
34 | void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, | |
35 | struct ieee80211_sta_ht_cap *ht_cap) | |
36 | { | |
822854b0 SW |
37 | struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; |
38 | u8 *scaps, *smask; | |
ef96a842 BG |
39 | int i; |
40 | ||
e1a0c6b3 JB |
41 | if (!ht_cap->ht_supported) |
42 | return; | |
43 | ||
822854b0 SW |
44 | switch (sdata->vif.type) { |
45 | case NL80211_IFTYPE_STATION: | |
46 | ht_capa = &sdata->u.mgd.ht_capa; | |
47 | ht_capa_mask = &sdata->u.mgd.ht_capa_mask; | |
48 | break; | |
49 | case NL80211_IFTYPE_ADHOC: | |
50 | ht_capa = &sdata->u.ibss.ht_capa; | |
51 | ht_capa_mask = &sdata->u.ibss.ht_capa_mask; | |
52 | break; | |
53 | default: | |
54 | WARN_ON_ONCE(1); | |
55 | return; | |
56 | } | |
57 | ||
58 | scaps = (u8 *)(&ht_capa->mcs.rx_mask); | |
59 | smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); | |
60 | ||
ef96a842 BG |
61 | /* NOTE: If you add more over-rides here, update register_hw |
62 | * ht_capa_mod_msk logic in main.c as well. | |
63 | * And, if this method can ever change ht_cap.ht_supported, fix | |
64 | * the check in ieee80211_add_ht_ie. | |
65 | */ | |
66 | ||
67 | /* check for HT over-rides, MCS rates first. */ | |
68 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { | |
69 | u8 m = smask[i]; | |
70 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ | |
71 | /* Add back rates that are supported */ | |
72 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); | |
73 | } | |
74 | ||
75 | /* Force removal of HT-40 capabilities? */ | |
822854b0 SW |
76 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
77 | IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
78 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, | |
79 | IEEE80211_HT_CAP_SGI_40); | |
ef96a842 | 80 | |
bc0784d9 | 81 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
822854b0 SW |
82 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
83 | IEEE80211_HT_CAP_SGI_20); | |
bc0784d9 | 84 | |
ef96a842 | 85 | /* Allow user to disable the max-AMSDU bit. */ |
822854b0 SW |
86 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
87 | IEEE80211_HT_CAP_MAX_AMSDU); | |
ef96a842 BG |
88 | |
89 | /* Allow user to decrease AMPDU factor */ | |
822854b0 | 90 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 91 | IEEE80211_HT_AMPDU_PARM_FACTOR) { |
822854b0 SW |
92 | u8 n = ht_capa->ampdu_params_info & |
93 | IEEE80211_HT_AMPDU_PARM_FACTOR; | |
ef96a842 BG |
94 | if (n < ht_cap->ampdu_factor) |
95 | ht_cap->ampdu_factor = n; | |
96 | } | |
97 | ||
98 | /* Allow the user to increase AMPDU density. */ | |
822854b0 | 99 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 100 | IEEE80211_HT_AMPDU_PARM_DENSITY) { |
822854b0 | 101 | u8 n = (ht_capa->ampdu_params_info & |
ef96a842 BG |
102 | IEEE80211_HT_AMPDU_PARM_DENSITY) |
103 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; | |
104 | if (n > ht_cap->ampdu_density) | |
105 | ht_cap->ampdu_density = n; | |
106 | } | |
107 | } | |
108 | ||
109 | ||
e1a0c6b3 | 110 | bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
ef96a842 | 111 | struct ieee80211_supported_band *sband, |
4a3cb702 | 112 | const struct ieee80211_ht_cap *ht_cap_ie, |
e1a0c6b3 | 113 | struct sta_info *sta) |
44d414db | 114 | { |
c07270b6 | 115 | struct ieee80211_sta_ht_cap ht_cap, own_cap; |
ae5eb026 JB |
116 | u8 ampdu_info, tx_mcs_set_cap; |
117 | int i, max_tx_streams; | |
e1a0c6b3 JB |
118 | bool changed; |
119 | enum ieee80211_sta_rx_bandwidth bw; | |
af0ed69b | 120 | enum ieee80211_smps_mode smps_mode; |
44d414db | 121 | |
e1a0c6b3 | 122 | memset(&ht_cap, 0, sizeof(ht_cap)); |
44d414db | 123 | |
15804e3e | 124 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
e1a0c6b3 | 125 | goto apply; |
d9fe60de | 126 | |
e1a0c6b3 | 127 | ht_cap.ht_supported = true; |
d9fe60de | 128 | |
c07270b6 JB |
129 | own_cap = sband->ht_cap; |
130 | ||
131 | /* | |
132 | * If user has specified capability over-rides, take care | |
133 | * of that if the station we're setting up is the AP that | |
134 | * we advertised a restricted capability set to. Override | |
135 | * our own capabilities and then use those below. | |
136 | */ | |
822854b0 SW |
137 | if ((sdata->vif.type == NL80211_IFTYPE_STATION || |
138 | sdata->vif.type == NL80211_IFTYPE_ADHOC) && | |
c07270b6 JB |
139 | !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) |
140 | ieee80211_apply_htcap_overrides(sdata, &own_cap); | |
141 | ||
9a418af5 JB |
142 | /* |
143 | * The bits listed in this expression should be | |
144 | * the same for the peer and us, if the station | |
145 | * advertises more then we can't use those thus | |
146 | * we mask them out. | |
147 | */ | |
e1a0c6b3 | 148 | ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & |
c07270b6 JB |
149 | (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | |
150 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | | |
151 | IEEE80211_HT_CAP_GRN_FLD | | |
152 | IEEE80211_HT_CAP_SGI_20 | | |
153 | IEEE80211_HT_CAP_SGI_40 | | |
154 | IEEE80211_HT_CAP_DSSSCCK40)); | |
21add825 | 155 | |
9a418af5 JB |
156 | /* |
157 | * The STBC bits are asymmetric -- if we don't have | |
158 | * TX then mask out the peer's RX and vice versa. | |
159 | */ | |
c07270b6 | 160 | if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
e1a0c6b3 | 161 | ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; |
c07270b6 | 162 | if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
e1a0c6b3 | 163 | ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; |
d9fe60de | 164 | |
ae5eb026 | 165 | ampdu_info = ht_cap_ie->ampdu_params_info; |
e1a0c6b3 | 166 | ht_cap.ampdu_factor = |
ae5eb026 | 167 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
e1a0c6b3 | 168 | ht_cap.ampdu_density = |
ae5eb026 | 169 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
44d414db | 170 | |
d9fe60de | 171 | /* own MCS TX capabilities */ |
c07270b6 | 172 | tx_mcs_set_cap = own_cap.mcs.tx_params; |
d9fe60de | 173 | |
90b4ca9d | 174 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
e1a0c6b3 | 175 | ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; |
90b4ca9d | 176 | |
d9fe60de JB |
177 | /* can we TX with MCS rates? */ |
178 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) | |
e1a0c6b3 | 179 | goto apply; |
d9fe60de JB |
180 | |
181 | /* Counting from 0, therefore +1 */ | |
182 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) | |
183 | max_tx_streams = | |
184 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
185 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
186 | else | |
187 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; | |
188 | ||
189 | /* | |
90b4ca9d | 190 | * 802.11n-2009 20.3.5 / 20.6 says: |
d9fe60de JB |
191 | * - indices 0 to 7 and 32 are single spatial stream |
192 | * - 8 to 31 are multiple spatial streams using equal modulation | |
193 | * [8..15 for two streams, 16..23 for three and 24..31 for four] | |
194 | * - remainder are multiple spatial streams using unequal modulation | |
195 | */ | |
196 | for (i = 0; i < max_tx_streams; i++) | |
e1a0c6b3 | 197 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 198 | own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
199 | |
200 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) | |
201 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; | |
202 | i < IEEE80211_HT_MCS_MASK_LEN; i++) | |
e1a0c6b3 | 203 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 204 | own_cap.mcs.rx_mask[i] & |
ae5eb026 | 205 | ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
206 | |
207 | /* handle MCS rate 32 too */ | |
c07270b6 | 208 | if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
e1a0c6b3 | 209 | ht_cap.mcs.rx_mask[32/8] |= 1; |
ef96a842 | 210 | |
e1a0c6b3 | 211 | apply: |
e1a0c6b3 JB |
212 | changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
213 | ||
214 | memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); | |
215 | ||
216 | switch (sdata->vif.bss_conf.chandef.width) { | |
217 | default: | |
218 | WARN_ON_ONCE(1); | |
219 | /* fall through */ | |
220 | case NL80211_CHAN_WIDTH_20_NOHT: | |
221 | case NL80211_CHAN_WIDTH_20: | |
222 | bw = IEEE80211_STA_RX_BW_20; | |
223 | break; | |
224 | case NL80211_CHAN_WIDTH_40: | |
225 | case NL80211_CHAN_WIDTH_80: | |
226 | case NL80211_CHAN_WIDTH_80P80: | |
227 | case NL80211_CHAN_WIDTH_160: | |
228 | bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
229 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
230 | break; | |
231 | } | |
232 | ||
233 | if (bw != sta->sta.bandwidth) | |
234 | changed = true; | |
235 | sta->sta.bandwidth = bw; | |
236 | ||
0af83d3d JB |
237 | sta->cur_max_bandwidth = |
238 | ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
239 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
240 | ||
af0ed69b JB |
241 | switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) |
242 | >> IEEE80211_HT_CAP_SM_PS_SHIFT) { | |
243 | case WLAN_HT_CAP_SM_PS_INVALID: | |
244 | case WLAN_HT_CAP_SM_PS_STATIC: | |
245 | smps_mode = IEEE80211_SMPS_STATIC; | |
246 | break; | |
247 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | |
248 | smps_mode = IEEE80211_SMPS_DYNAMIC; | |
249 | break; | |
250 | case WLAN_HT_CAP_SM_PS_DISABLED: | |
251 | smps_mode = IEEE80211_SMPS_OFF; | |
252 | break; | |
253 | } | |
254 | ||
255 | if (smps_mode != sta->sta.smps_mode) | |
256 | changed = true; | |
257 | sta->sta.smps_mode = smps_mode; | |
258 | ||
e1a0c6b3 | 259 | return changed; |
ae5eb026 JB |
260 | } |
261 | ||
c82c4a80 JB |
262 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, |
263 | enum ieee80211_agg_stop_reason reason) | |
de1ede7a | 264 | { |
b8695a8f | 265 | int i; |
de1ede7a | 266 | |
0ab33703 JB |
267 | cancel_work_sync(&sta->ampdu_mlme.work); |
268 | ||
5a306f58 | 269 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
c82c4a80 | 270 | __ieee80211_stop_tx_ba_session(sta, i, reason); |
849b7967 | 271 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
c82c4a80 JB |
272 | WLAN_REASON_QSTA_LEAVE_QBSS, |
273 | reason != AGG_STOP_DESTROY_STA && | |
274 | reason != AGG_STOP_PEER_REQUEST); | |
de1ede7a | 275 | } |
de1ede7a JB |
276 | } |
277 | ||
67c282c0 JB |
278 | void ieee80211_ba_session_work(struct work_struct *work) |
279 | { | |
280 | struct sta_info *sta = | |
281 | container_of(work, struct sta_info, ampdu_mlme.work); | |
282 | struct tid_ampdu_tx *tid_tx; | |
283 | int tid; | |
284 | ||
285 | /* | |
286 | * When this flag is set, new sessions should be | |
287 | * blocked, and existing sessions will be torn | |
288 | * down by the code that set the flag, so this | |
289 | * need not run. | |
290 | */ | |
c2c98fde | 291 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
67c282c0 JB |
292 | return; |
293 | ||
a93e3644 | 294 | mutex_lock(&sta->ampdu_mlme.mtx); |
5a306f58 | 295 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
7c3b1dd8 JB |
296 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
297 | ___ieee80211_stop_rx_ba_session( | |
298 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 | 299 | WLAN_REASON_QSTA_TIMEOUT, true); |
7c3b1dd8 | 300 | |
f41ccd71 SL |
301 | if (test_and_clear_bit(tid, |
302 | sta->ampdu_mlme.tid_rx_stop_requested)) | |
303 | ___ieee80211_stop_rx_ba_session( | |
304 | sta, tid, WLAN_BACK_RECIPIENT, | |
305 | WLAN_REASON_UNSPECIFIED, true); | |
306 | ||
e562078a BG |
307 | spin_lock_bh(&sta->lock); |
308 | ||
ec034b20 JB |
309 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
310 | if (tid_tx) { | |
311 | /* | |
312 | * Assign it over to the normal tid_tx array | |
313 | * where it "goes live". | |
314 | */ | |
ec034b20 JB |
315 | |
316 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; | |
317 | /* could there be a race? */ | |
318 | if (sta->ampdu_mlme.tid_tx[tid]) | |
319 | kfree(tid_tx); | |
320 | else | |
321 | ieee80211_assign_tid_tx(sta, tid, tid_tx); | |
322 | spin_unlock_bh(&sta->lock); | |
67c282c0 | 323 | |
67c282c0 | 324 | ieee80211_tx_ba_session_handle_start(sta, tid); |
ec034b20 JB |
325 | continue; |
326 | } | |
e562078a | 327 | spin_unlock_bh(&sta->lock); |
ec034b20 | 328 | |
40b275b6 | 329 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
ec034b20 JB |
330 | if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP, |
331 | &tid_tx->state)) | |
67c282c0 | 332 | ___ieee80211_stop_tx_ba_session(sta, tid, |
c82c4a80 | 333 | AGG_STOP_LOCAL_REQUEST); |
67c282c0 | 334 | } |
cfcdbde3 | 335 | mutex_unlock(&sta->ampdu_mlme.mtx); |
67c282c0 JB |
336 | } |
337 | ||
b8695a8f JB |
338 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
339 | const u8 *da, u16 tid, | |
340 | u16 initiator, u16 reason_code) | |
44d414db JB |
341 | { |
342 | struct ieee80211_local *local = sdata->local; | |
44d414db JB |
343 | struct sk_buff *skb; |
344 | struct ieee80211_mgmt *mgmt; | |
345 | u16 params; | |
346 | ||
347 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 348 | if (!skb) |
44d414db | 349 | return; |
44d414db JB |
350 | |
351 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
352 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
353 | memset(mgmt, 0, 24); | |
354 | memcpy(mgmt->da, da, ETH_ALEN); | |
47846c9b | 355 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 356 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
357 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
358 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 359 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
360 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
361 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
362 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
363 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 364 | |
44d414db JB |
365 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
366 | IEEE80211_STYPE_ACTION); | |
367 | ||
368 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
369 | ||
370 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
371 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
372 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
373 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
374 | ||
375 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
376 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
377 | ||
cf6bb79a | 378 | ieee80211_tx_skb_tid(sdata, skb, tid); |
44d414db JB |
379 | } |
380 | ||
de1ede7a JB |
381 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
382 | struct sta_info *sta, | |
383 | struct ieee80211_mgmt *mgmt, size_t len) | |
384 | { | |
de1ede7a JB |
385 | u16 tid, params; |
386 | u16 initiator; | |
de1ede7a JB |
387 | |
388 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
389 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
390 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
391 | ||
bdcbd8e0 JB |
392 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
393 | mgmt->sa, initiator ? "initiator" : "recipient", | |
394 | tid, | |
395 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); | |
de1ede7a JB |
396 | |
397 | if (initiator == WLAN_BACK_INITIATOR) | |
53f73c09 JB |
398 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
399 | true); | |
a622ab72 | 400 | else |
c82c4a80 | 401 | __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); |
de1ede7a | 402 | } |
0f78231b JB |
403 | |
404 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, | |
405 | enum ieee80211_smps_mode smps, const u8 *da, | |
406 | const u8 *bssid) | |
407 | { | |
408 | struct ieee80211_local *local = sdata->local; | |
409 | struct sk_buff *skb; | |
410 | struct ieee80211_mgmt *action_frame; | |
411 | ||
412 | /* 27 = header + category + action + smps mode */ | |
413 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); | |
414 | if (!skb) | |
415 | return -ENOMEM; | |
416 | ||
417 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
418 | action_frame = (void *)skb_put(skb, 27); | |
419 | memcpy(action_frame->da, da, ETH_ALEN); | |
420 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); | |
421 | memcpy(action_frame->bssid, bssid, ETH_ALEN); | |
422 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
423 | IEEE80211_STYPE_ACTION); | |
424 | action_frame->u.action.category = WLAN_CATEGORY_HT; | |
425 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; | |
426 | switch (smps) { | |
427 | case IEEE80211_SMPS_AUTOMATIC: | |
428 | case IEEE80211_SMPS_NUM_MODES: | |
429 | WARN_ON(1); | |
430 | case IEEE80211_SMPS_OFF: | |
431 | action_frame->u.action.u.ht_smps.smps_control = | |
432 | WLAN_HT_SMPS_CONTROL_DISABLED; | |
433 | break; | |
434 | case IEEE80211_SMPS_STATIC: | |
435 | action_frame->u.action.u.ht_smps.smps_control = | |
436 | WLAN_HT_SMPS_CONTROL_STATIC; | |
437 | break; | |
438 | case IEEE80211_SMPS_DYNAMIC: | |
439 | action_frame->u.action.u.ht_smps.smps_control = | |
440 | WLAN_HT_SMPS_CONTROL_DYNAMIC; | |
441 | break; | |
442 | } | |
443 | ||
444 | /* we'll do more on status of this frame */ | |
445 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
446 | ieee80211_tx_skb(sdata, skb); | |
447 | ||
448 | return 0; | |
449 | } | |
d1f5b7a3 | 450 | |
687da132 | 451 | void ieee80211_request_smps_mgd_work(struct work_struct *work) |
d1f5b7a3 JB |
452 | { |
453 | struct ieee80211_sub_if_data *sdata = | |
454 | container_of(work, struct ieee80211_sub_if_data, | |
455 | u.mgd.request_smps_work); | |
456 | ||
8d61ffa5 | 457 | sdata_lock(sdata); |
687da132 EG |
458 | __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode); |
459 | sdata_unlock(sdata); | |
460 | } | |
461 | ||
462 | void ieee80211_request_smps_ap_work(struct work_struct *work) | |
463 | { | |
464 | struct ieee80211_sub_if_data *sdata = | |
465 | container_of(work, struct ieee80211_sub_if_data, | |
466 | u.ap.request_smps_work); | |
467 | ||
468 | sdata_lock(sdata); | |
469 | __ieee80211_request_smps_ap(sdata, sdata->u.ap.driver_smps_mode); | |
8d61ffa5 | 470 | sdata_unlock(sdata); |
d1f5b7a3 JB |
471 | } |
472 | ||
473 | void ieee80211_request_smps(struct ieee80211_vif *vif, | |
474 | enum ieee80211_smps_mode smps_mode) | |
475 | { | |
476 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
477 | ||
687da132 EG |
478 | if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION && |
479 | vif->type != NL80211_IFTYPE_AP)) | |
d1f5b7a3 JB |
480 | return; |
481 | ||
482 | if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF)) | |
483 | smps_mode = IEEE80211_SMPS_AUTOMATIC; | |
484 | ||
687da132 EG |
485 | if (vif->type == NL80211_IFTYPE_STATION) { |
486 | if (sdata->u.mgd.driver_smps_mode == smps_mode) | |
487 | return; | |
488 | sdata->u.mgd.driver_smps_mode = smps_mode; | |
489 | ieee80211_queue_work(&sdata->local->hw, | |
490 | &sdata->u.mgd.request_smps_work); | |
491 | } else { | |
492 | /* AUTOMATIC is meaningless in AP mode */ | |
493 | if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC)) | |
494 | return; | |
495 | if (sdata->u.ap.driver_smps_mode == smps_mode) | |
496 | return; | |
497 | sdata->u.ap.driver_smps_mode = smps_mode; | |
498 | ieee80211_queue_work(&sdata->local->hw, | |
499 | &sdata->u.ap.request_smps_work); | |
500 | } | |
d1f5b7a3 JB |
501 | } |
502 | /* this might change ... don't want non-open drivers using it */ | |
503 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |