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 | |
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 | ||
9a07bf50 JM |
34 | static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, |
35 | struct ieee80211_ht_cap *ht_capa_mask, | |
36 | struct ieee80211_sta_ht_cap *ht_cap, | |
37 | u16 flag) | |
38 | { | |
39 | __le16 le_flag = cpu_to_le16(flag); | |
40 | ||
41 | if ((ht_capa_mask->cap_info & le_flag) && | |
42 | (ht_capa->cap_info & le_flag)) | |
43 | ht_cap->cap |= flag; | |
44 | } | |
45 | ||
ef96a842 BG |
46 | void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, |
47 | struct ieee80211_sta_ht_cap *ht_cap) | |
48 | { | |
822854b0 SW |
49 | struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; |
50 | u8 *scaps, *smask; | |
ef96a842 BG |
51 | int i; |
52 | ||
e1a0c6b3 JB |
53 | if (!ht_cap->ht_supported) |
54 | return; | |
55 | ||
822854b0 SW |
56 | switch (sdata->vif.type) { |
57 | case NL80211_IFTYPE_STATION: | |
58 | ht_capa = &sdata->u.mgd.ht_capa; | |
59 | ht_capa_mask = &sdata->u.mgd.ht_capa_mask; | |
60 | break; | |
61 | case NL80211_IFTYPE_ADHOC: | |
62 | ht_capa = &sdata->u.ibss.ht_capa; | |
63 | ht_capa_mask = &sdata->u.ibss.ht_capa_mask; | |
64 | break; | |
65 | default: | |
66 | WARN_ON_ONCE(1); | |
67 | return; | |
68 | } | |
69 | ||
70 | scaps = (u8 *)(&ht_capa->mcs.rx_mask); | |
71 | smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); | |
72 | ||
ef96a842 | 73 | /* NOTE: If you add more over-rides here, update register_hw |
9a07bf50 | 74 | * ht_capa_mod_mask logic in main.c as well. |
ef96a842 BG |
75 | * And, if this method can ever change ht_cap.ht_supported, fix |
76 | * the check in ieee80211_add_ht_ie. | |
77 | */ | |
78 | ||
79 | /* check for HT over-rides, MCS rates first. */ | |
80 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { | |
81 | u8 m = smask[i]; | |
82 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ | |
83 | /* Add back rates that are supported */ | |
84 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); | |
85 | } | |
86 | ||
87 | /* Force removal of HT-40 capabilities? */ | |
822854b0 SW |
88 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
89 | IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
90 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, | |
91 | IEEE80211_HT_CAP_SGI_40); | |
ef96a842 | 92 | |
bc0784d9 | 93 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
822854b0 SW |
94 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
95 | IEEE80211_HT_CAP_SGI_20); | |
bc0784d9 | 96 | |
ef96a842 | 97 | /* Allow user to disable the max-AMSDU bit. */ |
822854b0 SW |
98 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
99 | IEEE80211_HT_CAP_MAX_AMSDU); | |
ef96a842 | 100 | |
a2e7495d PK |
101 | /* Allow user to disable LDPC */ |
102 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, | |
103 | IEEE80211_HT_CAP_LDPC_CODING); | |
104 | ||
9a07bf50 JM |
105 | /* Allow user to enable 40 MHz intolerant bit. */ |
106 | __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, | |
107 | IEEE80211_HT_CAP_40MHZ_INTOLERANT); | |
108 | ||
ef96a842 | 109 | /* Allow user to decrease AMPDU factor */ |
822854b0 | 110 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 111 | IEEE80211_HT_AMPDU_PARM_FACTOR) { |
822854b0 SW |
112 | u8 n = ht_capa->ampdu_params_info & |
113 | IEEE80211_HT_AMPDU_PARM_FACTOR; | |
ef96a842 BG |
114 | if (n < ht_cap->ampdu_factor) |
115 | ht_cap->ampdu_factor = n; | |
116 | } | |
117 | ||
118 | /* Allow the user to increase AMPDU density. */ | |
822854b0 | 119 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 120 | IEEE80211_HT_AMPDU_PARM_DENSITY) { |
822854b0 | 121 | u8 n = (ht_capa->ampdu_params_info & |
ef96a842 BG |
122 | IEEE80211_HT_AMPDU_PARM_DENSITY) |
123 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; | |
124 | if (n > ht_cap->ampdu_density) | |
125 | ht_cap->ampdu_density = n; | |
126 | } | |
127 | } | |
128 | ||
129 | ||
e1a0c6b3 | 130 | bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
ef96a842 | 131 | struct ieee80211_supported_band *sband, |
4a3cb702 | 132 | const struct ieee80211_ht_cap *ht_cap_ie, |
e1a0c6b3 | 133 | struct sta_info *sta) |
44d414db | 134 | { |
c07270b6 | 135 | struct ieee80211_sta_ht_cap ht_cap, own_cap; |
ae5eb026 JB |
136 | u8 ampdu_info, tx_mcs_set_cap; |
137 | int i, max_tx_streams; | |
e1a0c6b3 JB |
138 | bool changed; |
139 | enum ieee80211_sta_rx_bandwidth bw; | |
af0ed69b | 140 | enum ieee80211_smps_mode smps_mode; |
44d414db | 141 | |
e1a0c6b3 | 142 | memset(&ht_cap, 0, sizeof(ht_cap)); |
44d414db | 143 | |
15804e3e | 144 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
e1a0c6b3 | 145 | goto apply; |
d9fe60de | 146 | |
e1a0c6b3 | 147 | ht_cap.ht_supported = true; |
d9fe60de | 148 | |
c07270b6 JB |
149 | own_cap = sband->ht_cap; |
150 | ||
151 | /* | |
152 | * If user has specified capability over-rides, take care | |
13cc8a4a | 153 | * of that if the station we're setting up is the AP or TDLS peer that |
c07270b6 JB |
154 | * we advertised a restricted capability set to. Override |
155 | * our own capabilities and then use those below. | |
156 | */ | |
13cc8a4a AN |
157 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
158 | sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
c07270b6 JB |
159 | ieee80211_apply_htcap_overrides(sdata, &own_cap); |
160 | ||
9a418af5 JB |
161 | /* |
162 | * The bits listed in this expression should be | |
163 | * the same for the peer and us, if the station | |
164 | * advertises more then we can't use those thus | |
165 | * we mask them out. | |
166 | */ | |
e1a0c6b3 | 167 | ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & |
c07270b6 JB |
168 | (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | |
169 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | | |
170 | IEEE80211_HT_CAP_GRN_FLD | | |
171 | IEEE80211_HT_CAP_SGI_20 | | |
172 | IEEE80211_HT_CAP_SGI_40 | | |
173 | IEEE80211_HT_CAP_DSSSCCK40)); | |
21add825 | 174 | |
9a418af5 JB |
175 | /* |
176 | * The STBC bits are asymmetric -- if we don't have | |
177 | * TX then mask out the peer's RX and vice versa. | |
178 | */ | |
c07270b6 | 179 | if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
e1a0c6b3 | 180 | ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; |
c07270b6 | 181 | if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
e1a0c6b3 | 182 | ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; |
d9fe60de | 183 | |
ae5eb026 | 184 | ampdu_info = ht_cap_ie->ampdu_params_info; |
e1a0c6b3 | 185 | ht_cap.ampdu_factor = |
ae5eb026 | 186 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
e1a0c6b3 | 187 | ht_cap.ampdu_density = |
ae5eb026 | 188 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
44d414db | 189 | |
d9fe60de | 190 | /* own MCS TX capabilities */ |
c07270b6 | 191 | tx_mcs_set_cap = own_cap.mcs.tx_params; |
d9fe60de | 192 | |
90b4ca9d | 193 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
e1a0c6b3 | 194 | ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; |
90b4ca9d | 195 | |
d9fe60de JB |
196 | /* can we TX with MCS rates? */ |
197 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) | |
e1a0c6b3 | 198 | goto apply; |
d9fe60de JB |
199 | |
200 | /* Counting from 0, therefore +1 */ | |
201 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) | |
202 | max_tx_streams = | |
203 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
204 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
205 | else | |
206 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; | |
207 | ||
208 | /* | |
90b4ca9d | 209 | * 802.11n-2009 20.3.5 / 20.6 says: |
d9fe60de JB |
210 | * - indices 0 to 7 and 32 are single spatial stream |
211 | * - 8 to 31 are multiple spatial streams using equal modulation | |
212 | * [8..15 for two streams, 16..23 for three and 24..31 for four] | |
213 | * - remainder are multiple spatial streams using unequal modulation | |
214 | */ | |
215 | for (i = 0; i < max_tx_streams; i++) | |
e1a0c6b3 | 216 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 217 | own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
218 | |
219 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) | |
220 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; | |
221 | i < IEEE80211_HT_MCS_MASK_LEN; i++) | |
e1a0c6b3 | 222 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 223 | own_cap.mcs.rx_mask[i] & |
ae5eb026 | 224 | ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
225 | |
226 | /* handle MCS rate 32 too */ | |
c07270b6 | 227 | if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
e1a0c6b3 | 228 | ht_cap.mcs.rx_mask[32/8] |= 1; |
ef96a842 | 229 | |
dc5943d5 AN |
230 | /* set Rx highest rate */ |
231 | ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest; | |
232 | ||
506bcfa8 EG |
233 | if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU) |
234 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935; | |
235 | else | |
236 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839; | |
237 | ||
e1a0c6b3 | 238 | apply: |
e1a0c6b3 JB |
239 | changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
240 | ||
241 | memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); | |
242 | ||
243 | switch (sdata->vif.bss_conf.chandef.width) { | |
244 | default: | |
245 | WARN_ON_ONCE(1); | |
246 | /* fall through */ | |
247 | case NL80211_CHAN_WIDTH_20_NOHT: | |
248 | case NL80211_CHAN_WIDTH_20: | |
249 | bw = IEEE80211_STA_RX_BW_20; | |
250 | break; | |
251 | case NL80211_CHAN_WIDTH_40: | |
252 | case NL80211_CHAN_WIDTH_80: | |
253 | case NL80211_CHAN_WIDTH_80P80: | |
254 | case NL80211_CHAN_WIDTH_160: | |
255 | bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
256 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
257 | break; | |
258 | } | |
259 | ||
e1a0c6b3 JB |
260 | sta->sta.bandwidth = bw; |
261 | ||
0af83d3d JB |
262 | sta->cur_max_bandwidth = |
263 | ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
264 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
265 | ||
af0ed69b JB |
266 | switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) |
267 | >> IEEE80211_HT_CAP_SM_PS_SHIFT) { | |
268 | case WLAN_HT_CAP_SM_PS_INVALID: | |
269 | case WLAN_HT_CAP_SM_PS_STATIC: | |
270 | smps_mode = IEEE80211_SMPS_STATIC; | |
271 | break; | |
272 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | |
273 | smps_mode = IEEE80211_SMPS_DYNAMIC; | |
274 | break; | |
275 | case WLAN_HT_CAP_SM_PS_DISABLED: | |
276 | smps_mode = IEEE80211_SMPS_OFF; | |
277 | break; | |
278 | } | |
279 | ||
280 | if (smps_mode != sta->sta.smps_mode) | |
281 | changed = true; | |
282 | sta->sta.smps_mode = smps_mode; | |
283 | ||
e1a0c6b3 | 284 | return changed; |
ae5eb026 JB |
285 | } |
286 | ||
c82c4a80 JB |
287 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, |
288 | enum ieee80211_agg_stop_reason reason) | |
de1ede7a | 289 | { |
b8695a8f | 290 | int i; |
de1ede7a | 291 | |
0ab33703 JB |
292 | cancel_work_sync(&sta->ampdu_mlme.work); |
293 | ||
5a306f58 | 294 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { |
c82c4a80 | 295 | __ieee80211_stop_tx_ba_session(sta, i, reason); |
849b7967 | 296 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
c82c4a80 JB |
297 | WLAN_REASON_QSTA_LEAVE_QBSS, |
298 | reason != AGG_STOP_DESTROY_STA && | |
299 | reason != AGG_STOP_PEER_REQUEST); | |
de1ede7a | 300 | } |
de1ede7a JB |
301 | } |
302 | ||
67c282c0 JB |
303 | void ieee80211_ba_session_work(struct work_struct *work) |
304 | { | |
305 | struct sta_info *sta = | |
306 | container_of(work, struct sta_info, ampdu_mlme.work); | |
307 | struct tid_ampdu_tx *tid_tx; | |
308 | int tid; | |
309 | ||
310 | /* | |
311 | * When this flag is set, new sessions should be | |
312 | * blocked, and existing sessions will be torn | |
313 | * down by the code that set the flag, so this | |
314 | * need not run. | |
315 | */ | |
c2c98fde | 316 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
67c282c0 JB |
317 | return; |
318 | ||
a93e3644 | 319 | mutex_lock(&sta->ampdu_mlme.mtx); |
5a306f58 | 320 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
7c3b1dd8 JB |
321 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
322 | ___ieee80211_stop_rx_ba_session( | |
323 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 | 324 | WLAN_REASON_QSTA_TIMEOUT, true); |
7c3b1dd8 | 325 | |
f41ccd71 SL |
326 | if (test_and_clear_bit(tid, |
327 | sta->ampdu_mlme.tid_rx_stop_requested)) | |
328 | ___ieee80211_stop_rx_ba_session( | |
329 | sta, tid, WLAN_BACK_RECIPIENT, | |
330 | WLAN_REASON_UNSPECIFIED, true); | |
331 | ||
e562078a BG |
332 | spin_lock_bh(&sta->lock); |
333 | ||
ec034b20 JB |
334 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
335 | if (tid_tx) { | |
336 | /* | |
337 | * Assign it over to the normal tid_tx array | |
338 | * where it "goes live". | |
339 | */ | |
ec034b20 JB |
340 | |
341 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; | |
342 | /* could there be a race? */ | |
343 | if (sta->ampdu_mlme.tid_tx[tid]) | |
344 | kfree(tid_tx); | |
345 | else | |
346 | ieee80211_assign_tid_tx(sta, tid, tid_tx); | |
347 | spin_unlock_bh(&sta->lock); | |
67c282c0 | 348 | |
67c282c0 | 349 | ieee80211_tx_ba_session_handle_start(sta, tid); |
ec034b20 JB |
350 | continue; |
351 | } | |
e562078a | 352 | spin_unlock_bh(&sta->lock); |
ec034b20 | 353 | |
40b275b6 | 354 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
ec034b20 JB |
355 | if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP, |
356 | &tid_tx->state)) | |
67c282c0 | 357 | ___ieee80211_stop_tx_ba_session(sta, tid, |
c82c4a80 | 358 | AGG_STOP_LOCAL_REQUEST); |
67c282c0 | 359 | } |
cfcdbde3 | 360 | mutex_unlock(&sta->ampdu_mlme.mtx); |
67c282c0 JB |
361 | } |
362 | ||
b8695a8f JB |
363 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
364 | const u8 *da, u16 tid, | |
365 | u16 initiator, u16 reason_code) | |
44d414db JB |
366 | { |
367 | struct ieee80211_local *local = sdata->local; | |
44d414db JB |
368 | struct sk_buff *skb; |
369 | struct ieee80211_mgmt *mgmt; | |
370 | u16 params; | |
371 | ||
372 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 373 | if (!skb) |
44d414db | 374 | return; |
44d414db JB |
375 | |
376 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
377 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); | |
378 | memset(mgmt, 0, 24); | |
379 | memcpy(mgmt->da, da, ETH_ALEN); | |
47846c9b | 380 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 381 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
382 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
383 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 384 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
385 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
386 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
387 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
388 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 389 | |
44d414db JB |
390 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
391 | IEEE80211_STYPE_ACTION); | |
392 | ||
393 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
394 | ||
395 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
396 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
397 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
398 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
399 | ||
400 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
401 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
402 | ||
c6e13327 | 403 | ieee80211_tx_skb(sdata, skb); |
44d414db JB |
404 | } |
405 | ||
de1ede7a JB |
406 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
407 | struct sta_info *sta, | |
408 | struct ieee80211_mgmt *mgmt, size_t len) | |
409 | { | |
de1ede7a JB |
410 | u16 tid, params; |
411 | u16 initiator; | |
de1ede7a JB |
412 | |
413 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
414 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
415 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
416 | ||
bdcbd8e0 JB |
417 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
418 | mgmt->sa, initiator ? "initiator" : "recipient", | |
419 | tid, | |
420 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); | |
de1ede7a JB |
421 | |
422 | if (initiator == WLAN_BACK_INITIATOR) | |
53f73c09 JB |
423 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
424 | true); | |
a622ab72 | 425 | else |
c82c4a80 | 426 | __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); |
de1ede7a | 427 | } |
0f78231b JB |
428 | |
429 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, | |
430 | enum ieee80211_smps_mode smps, const u8 *da, | |
431 | const u8 *bssid) | |
432 | { | |
433 | struct ieee80211_local *local = sdata->local; | |
434 | struct sk_buff *skb; | |
435 | struct ieee80211_mgmt *action_frame; | |
436 | ||
437 | /* 27 = header + category + action + smps mode */ | |
438 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); | |
439 | if (!skb) | |
440 | return -ENOMEM; | |
441 | ||
442 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
443 | action_frame = (void *)skb_put(skb, 27); | |
444 | memcpy(action_frame->da, da, ETH_ALEN); | |
445 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); | |
446 | memcpy(action_frame->bssid, bssid, ETH_ALEN); | |
447 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
448 | IEEE80211_STYPE_ACTION); | |
449 | action_frame->u.action.category = WLAN_CATEGORY_HT; | |
450 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; | |
451 | switch (smps) { | |
452 | case IEEE80211_SMPS_AUTOMATIC: | |
453 | case IEEE80211_SMPS_NUM_MODES: | |
454 | WARN_ON(1); | |
455 | case IEEE80211_SMPS_OFF: | |
456 | action_frame->u.action.u.ht_smps.smps_control = | |
457 | WLAN_HT_SMPS_CONTROL_DISABLED; | |
458 | break; | |
459 | case IEEE80211_SMPS_STATIC: | |
460 | action_frame->u.action.u.ht_smps.smps_control = | |
461 | WLAN_HT_SMPS_CONTROL_STATIC; | |
462 | break; | |
463 | case IEEE80211_SMPS_DYNAMIC: | |
464 | action_frame->u.action.u.ht_smps.smps_control = | |
465 | WLAN_HT_SMPS_CONTROL_DYNAMIC; | |
466 | break; | |
467 | } | |
468 | ||
469 | /* we'll do more on status of this frame */ | |
470 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
471 | ieee80211_tx_skb(sdata, skb); | |
472 | ||
473 | return 0; | |
474 | } | |
d1f5b7a3 | 475 | |
687da132 | 476 | void ieee80211_request_smps_mgd_work(struct work_struct *work) |
d1f5b7a3 JB |
477 | { |
478 | struct ieee80211_sub_if_data *sdata = | |
479 | container_of(work, struct ieee80211_sub_if_data, | |
480 | u.mgd.request_smps_work); | |
481 | ||
8d61ffa5 | 482 | sdata_lock(sdata); |
687da132 EG |
483 | __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode); |
484 | sdata_unlock(sdata); | |
485 | } | |
486 | ||
487 | void ieee80211_request_smps_ap_work(struct work_struct *work) | |
488 | { | |
489 | struct ieee80211_sub_if_data *sdata = | |
490 | container_of(work, struct ieee80211_sub_if_data, | |
491 | u.ap.request_smps_work); | |
492 | ||
493 | sdata_lock(sdata); | |
8ffcc704 EG |
494 | if (sdata_dereference(sdata->u.ap.beacon, sdata)) |
495 | __ieee80211_request_smps_ap(sdata, | |
496 | sdata->u.ap.driver_smps_mode); | |
8d61ffa5 | 497 | sdata_unlock(sdata); |
d1f5b7a3 JB |
498 | } |
499 | ||
500 | void ieee80211_request_smps(struct ieee80211_vif *vif, | |
501 | enum ieee80211_smps_mode smps_mode) | |
502 | { | |
503 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
504 | ||
687da132 EG |
505 | if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION && |
506 | vif->type != NL80211_IFTYPE_AP)) | |
d1f5b7a3 JB |
507 | return; |
508 | ||
687da132 EG |
509 | if (vif->type == NL80211_IFTYPE_STATION) { |
510 | if (sdata->u.mgd.driver_smps_mode == smps_mode) | |
511 | return; | |
512 | sdata->u.mgd.driver_smps_mode = smps_mode; | |
513 | ieee80211_queue_work(&sdata->local->hw, | |
514 | &sdata->u.mgd.request_smps_work); | |
515 | } else { | |
516 | /* AUTOMATIC is meaningless in AP mode */ | |
517 | if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC)) | |
518 | return; | |
519 | if (sdata->u.ap.driver_smps_mode == smps_mode) | |
520 | return; | |
521 | sdata->u.ap.driver_smps_mode = smps_mode; | |
522 | ieee80211_queue_work(&sdata->local->hw, | |
523 | &sdata->u.ap.request_smps_work); | |
524 | } | |
d1f5b7a3 JB |
525 | } |
526 | /* this might change ... don't want non-open drivers using it */ | |
527 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |