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 |
7a7c0a64 | 10 | * Copyright 2017 Intel Deutschland GmbH |
44d414db JB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/ieee80211.h> | |
bc3b2d7f | 18 | #include <linux/export.h> |
44d414db JB |
19 | #include <net/mac80211.h> |
20 | #include "ieee80211_i.h" | |
81cb7623 | 21 | #include "rate.h" |
44d414db | 22 | |
822854b0 SW |
23 | static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa, |
24 | struct ieee80211_ht_cap *ht_capa_mask, | |
32dfefac BG |
25 | struct ieee80211_sta_ht_cap *ht_cap, |
26 | u16 flag) | |
ef96a842 BG |
27 | { |
28 | __le16 le_flag = cpu_to_le16(flag); | |
822854b0 SW |
29 | if (ht_capa_mask->cap_info & le_flag) { |
30 | if (!(ht_capa->cap_info & le_flag)) | |
ef96a842 BG |
31 | ht_cap->cap &= ~flag; |
32 | } | |
33 | } | |
34 | ||
9a07bf50 JM |
35 | static void __check_htcap_enable(struct ieee80211_ht_cap *ht_capa, |
36 | struct ieee80211_ht_cap *ht_capa_mask, | |
37 | struct ieee80211_sta_ht_cap *ht_cap, | |
38 | u16 flag) | |
39 | { | |
40 | __le16 le_flag = cpu_to_le16(flag); | |
41 | ||
42 | if ((ht_capa_mask->cap_info & le_flag) && | |
43 | (ht_capa->cap_info & le_flag)) | |
44 | ht_cap->cap |= flag; | |
45 | } | |
46 | ||
ef96a842 BG |
47 | void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata, |
48 | struct ieee80211_sta_ht_cap *ht_cap) | |
49 | { | |
822854b0 SW |
50 | struct ieee80211_ht_cap *ht_capa, *ht_capa_mask; |
51 | u8 *scaps, *smask; | |
ef96a842 BG |
52 | int i; |
53 | ||
e1a0c6b3 JB |
54 | if (!ht_cap->ht_supported) |
55 | return; | |
56 | ||
822854b0 SW |
57 | switch (sdata->vif.type) { |
58 | case NL80211_IFTYPE_STATION: | |
59 | ht_capa = &sdata->u.mgd.ht_capa; | |
60 | ht_capa_mask = &sdata->u.mgd.ht_capa_mask; | |
61 | break; | |
62 | case NL80211_IFTYPE_ADHOC: | |
63 | ht_capa = &sdata->u.ibss.ht_capa; | |
64 | ht_capa_mask = &sdata->u.ibss.ht_capa_mask; | |
65 | break; | |
66 | default: | |
67 | WARN_ON_ONCE(1); | |
68 | return; | |
69 | } | |
70 | ||
71 | scaps = (u8 *)(&ht_capa->mcs.rx_mask); | |
72 | smask = (u8 *)(&ht_capa_mask->mcs.rx_mask); | |
73 | ||
ef96a842 | 74 | /* NOTE: If you add more over-rides here, update register_hw |
9a07bf50 | 75 | * ht_capa_mod_mask logic in main.c as well. |
ef96a842 BG |
76 | * And, if this method can ever change ht_cap.ht_supported, fix |
77 | * the check in ieee80211_add_ht_ie. | |
78 | */ | |
79 | ||
80 | /* check for HT over-rides, MCS rates first. */ | |
81 | for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { | |
82 | u8 m = smask[i]; | |
83 | ht_cap->mcs.rx_mask[i] &= ~m; /* turn off all masked bits */ | |
84 | /* Add back rates that are supported */ | |
85 | ht_cap->mcs.rx_mask[i] |= (m & scaps[i]); | |
86 | } | |
87 | ||
88 | /* Force removal of HT-40 capabilities? */ | |
822854b0 SW |
89 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
90 | IEEE80211_HT_CAP_SUP_WIDTH_20_40); | |
91 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, | |
92 | IEEE80211_HT_CAP_SGI_40); | |
ef96a842 | 93 | |
bc0784d9 | 94 | /* Allow user to disable SGI-20 (SGI-40 is handled above) */ |
822854b0 SW |
95 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
96 | IEEE80211_HT_CAP_SGI_20); | |
bc0784d9 | 97 | |
ef96a842 | 98 | /* Allow user to disable the max-AMSDU bit. */ |
822854b0 SW |
99 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, |
100 | IEEE80211_HT_CAP_MAX_AMSDU); | |
ef96a842 | 101 | |
a2e7495d PK |
102 | /* Allow user to disable LDPC */ |
103 | __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap, | |
104 | IEEE80211_HT_CAP_LDPC_CODING); | |
105 | ||
9a07bf50 JM |
106 | /* Allow user to enable 40 MHz intolerant bit. */ |
107 | __check_htcap_enable(ht_capa, ht_capa_mask, ht_cap, | |
108 | IEEE80211_HT_CAP_40MHZ_INTOLERANT); | |
109 | ||
ef96a842 | 110 | /* Allow user to decrease AMPDU factor */ |
822854b0 | 111 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 112 | IEEE80211_HT_AMPDU_PARM_FACTOR) { |
822854b0 SW |
113 | u8 n = ht_capa->ampdu_params_info & |
114 | IEEE80211_HT_AMPDU_PARM_FACTOR; | |
ef96a842 BG |
115 | if (n < ht_cap->ampdu_factor) |
116 | ht_cap->ampdu_factor = n; | |
117 | } | |
118 | ||
119 | /* Allow the user to increase AMPDU density. */ | |
822854b0 | 120 | if (ht_capa_mask->ampdu_params_info & |
ef96a842 | 121 | IEEE80211_HT_AMPDU_PARM_DENSITY) { |
822854b0 | 122 | u8 n = (ht_capa->ampdu_params_info & |
ef96a842 BG |
123 | IEEE80211_HT_AMPDU_PARM_DENSITY) |
124 | >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT; | |
125 | if (n > ht_cap->ampdu_density) | |
126 | ht_cap->ampdu_density = n; | |
127 | } | |
128 | } | |
129 | ||
130 | ||
e1a0c6b3 | 131 | bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata, |
ef96a842 | 132 | struct ieee80211_supported_band *sband, |
4a3cb702 | 133 | const struct ieee80211_ht_cap *ht_cap_ie, |
e1a0c6b3 | 134 | struct sta_info *sta) |
44d414db | 135 | { |
c07270b6 | 136 | struct ieee80211_sta_ht_cap ht_cap, own_cap; |
ae5eb026 JB |
137 | u8 ampdu_info, tx_mcs_set_cap; |
138 | int i, max_tx_streams; | |
e1a0c6b3 JB |
139 | bool changed; |
140 | enum ieee80211_sta_rx_bandwidth bw; | |
af0ed69b | 141 | enum ieee80211_smps_mode smps_mode; |
44d414db | 142 | |
e1a0c6b3 | 143 | memset(&ht_cap, 0, sizeof(ht_cap)); |
44d414db | 144 | |
15804e3e | 145 | if (!ht_cap_ie || !sband->ht_cap.ht_supported) |
e1a0c6b3 | 146 | goto apply; |
d9fe60de | 147 | |
e1a0c6b3 | 148 | ht_cap.ht_supported = true; |
d9fe60de | 149 | |
c07270b6 JB |
150 | own_cap = sband->ht_cap; |
151 | ||
152 | /* | |
153 | * If user has specified capability over-rides, take care | |
13cc8a4a | 154 | * of that if the station we're setting up is the AP or TDLS peer that |
c07270b6 JB |
155 | * we advertised a restricted capability set to. Override |
156 | * our own capabilities and then use those below. | |
157 | */ | |
13cc8a4a AN |
158 | if (sdata->vif.type == NL80211_IFTYPE_STATION || |
159 | sdata->vif.type == NL80211_IFTYPE_ADHOC) | |
c07270b6 JB |
160 | ieee80211_apply_htcap_overrides(sdata, &own_cap); |
161 | ||
9a418af5 JB |
162 | /* |
163 | * The bits listed in this expression should be | |
164 | * the same for the peer and us, if the station | |
165 | * advertises more then we can't use those thus | |
166 | * we mask them out. | |
167 | */ | |
e1a0c6b3 | 168 | ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) & |
c07270b6 JB |
169 | (own_cap.cap | ~(IEEE80211_HT_CAP_LDPC_CODING | |
170 | IEEE80211_HT_CAP_SUP_WIDTH_20_40 | | |
171 | IEEE80211_HT_CAP_GRN_FLD | | |
172 | IEEE80211_HT_CAP_SGI_20 | | |
173 | IEEE80211_HT_CAP_SGI_40 | | |
174 | IEEE80211_HT_CAP_DSSSCCK40)); | |
21add825 | 175 | |
9a418af5 JB |
176 | /* |
177 | * The STBC bits are asymmetric -- if we don't have | |
178 | * TX then mask out the peer's RX and vice versa. | |
179 | */ | |
c07270b6 | 180 | if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC)) |
e1a0c6b3 | 181 | ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC; |
c07270b6 | 182 | if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC)) |
e1a0c6b3 | 183 | ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC; |
d9fe60de | 184 | |
ae5eb026 | 185 | ampdu_info = ht_cap_ie->ampdu_params_info; |
e1a0c6b3 | 186 | ht_cap.ampdu_factor = |
ae5eb026 | 187 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
e1a0c6b3 | 188 | ht_cap.ampdu_density = |
ae5eb026 | 189 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
44d414db | 190 | |
d9fe60de | 191 | /* own MCS TX capabilities */ |
c07270b6 | 192 | tx_mcs_set_cap = own_cap.mcs.tx_params; |
d9fe60de | 193 | |
90b4ca9d | 194 | /* Copy peer MCS TX capabilities, the driver might need them. */ |
e1a0c6b3 | 195 | ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params; |
90b4ca9d | 196 | |
d9fe60de JB |
197 | /* can we TX with MCS rates? */ |
198 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) | |
e1a0c6b3 | 199 | goto apply; |
d9fe60de JB |
200 | |
201 | /* Counting from 0, therefore +1 */ | |
202 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) | |
203 | max_tx_streams = | |
204 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) | |
205 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; | |
206 | else | |
207 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; | |
208 | ||
209 | /* | |
90b4ca9d | 210 | * 802.11n-2009 20.3.5 / 20.6 says: |
d9fe60de JB |
211 | * - indices 0 to 7 and 32 are single spatial stream |
212 | * - 8 to 31 are multiple spatial streams using equal modulation | |
213 | * [8..15 for two streams, 16..23 for three and 24..31 for four] | |
214 | * - remainder are multiple spatial streams using unequal modulation | |
215 | */ | |
216 | for (i = 0; i < max_tx_streams; i++) | |
e1a0c6b3 | 217 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 218 | own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
219 | |
220 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) | |
221 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; | |
222 | i < IEEE80211_HT_MCS_MASK_LEN; i++) | |
e1a0c6b3 | 223 | ht_cap.mcs.rx_mask[i] = |
c07270b6 | 224 | own_cap.mcs.rx_mask[i] & |
ae5eb026 | 225 | ht_cap_ie->mcs.rx_mask[i]; |
d9fe60de JB |
226 | |
227 | /* handle MCS rate 32 too */ | |
c07270b6 | 228 | if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
e1a0c6b3 | 229 | ht_cap.mcs.rx_mask[32/8] |= 1; |
ef96a842 | 230 | |
dc5943d5 AN |
231 | /* set Rx highest rate */ |
232 | ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest; | |
233 | ||
506bcfa8 EG |
234 | if (ht_cap.cap & IEEE80211_HT_CAP_MAX_AMSDU) |
235 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_7935; | |
236 | else | |
237 | sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_HT_3839; | |
238 | ||
e1a0c6b3 | 239 | apply: |
e1a0c6b3 JB |
240 | changed = memcmp(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); |
241 | ||
242 | memcpy(&sta->sta.ht_cap, &ht_cap, sizeof(ht_cap)); | |
243 | ||
244 | switch (sdata->vif.bss_conf.chandef.width) { | |
245 | default: | |
246 | WARN_ON_ONCE(1); | |
247 | /* fall through */ | |
248 | case NL80211_CHAN_WIDTH_20_NOHT: | |
249 | case NL80211_CHAN_WIDTH_20: | |
250 | bw = IEEE80211_STA_RX_BW_20; | |
251 | break; | |
252 | case NL80211_CHAN_WIDTH_40: | |
253 | case NL80211_CHAN_WIDTH_80: | |
254 | case NL80211_CHAN_WIDTH_80P80: | |
255 | case NL80211_CHAN_WIDTH_160: | |
256 | bw = ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
257 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
258 | break; | |
259 | } | |
260 | ||
e1a0c6b3 JB |
261 | sta->sta.bandwidth = bw; |
262 | ||
0af83d3d JB |
263 | sta->cur_max_bandwidth = |
264 | ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
265 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
266 | ||
af0ed69b JB |
267 | switch ((ht_cap.cap & IEEE80211_HT_CAP_SM_PS) |
268 | >> IEEE80211_HT_CAP_SM_PS_SHIFT) { | |
269 | case WLAN_HT_CAP_SM_PS_INVALID: | |
270 | case WLAN_HT_CAP_SM_PS_STATIC: | |
271 | smps_mode = IEEE80211_SMPS_STATIC; | |
272 | break; | |
273 | case WLAN_HT_CAP_SM_PS_DYNAMIC: | |
274 | smps_mode = IEEE80211_SMPS_DYNAMIC; | |
275 | break; | |
276 | case WLAN_HT_CAP_SM_PS_DISABLED: | |
277 | smps_mode = IEEE80211_SMPS_OFF; | |
278 | break; | |
279 | } | |
280 | ||
281 | if (smps_mode != sta->sta.smps_mode) | |
282 | changed = true; | |
283 | sta->sta.smps_mode = smps_mode; | |
284 | ||
e1a0c6b3 | 285 | return changed; |
ae5eb026 JB |
286 | } |
287 | ||
c82c4a80 JB |
288 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, |
289 | enum ieee80211_agg_stop_reason reason) | |
de1ede7a | 290 | { |
b8695a8f | 291 | int i; |
de1ede7a | 292 | |
12811037 | 293 | mutex_lock(&sta->ampdu_mlme.mtx); |
0afe9d4a | 294 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
12811037 I |
295 | ___ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
296 | WLAN_REASON_QSTA_LEAVE_QBSS, | |
297 | reason != AGG_STOP_DESTROY_STA && | |
298 | reason != AGG_STOP_PEER_REQUEST); | |
7a7c0a64 | 299 | |
72e2c343 SS |
300 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) |
301 | ___ieee80211_stop_tx_ba_session(sta, i, reason); | |
0afe9d4a | 302 | mutex_unlock(&sta->ampdu_mlme.mtx); |
72e2c343 | 303 | |
7a7c0a64 JB |
304 | /* stopping might queue the work again - so cancel only afterwards */ |
305 | cancel_work_sync(&sta->ampdu_mlme.work); | |
98e93e96 I |
306 | |
307 | /* | |
308 | * In case the tear down is part of a reconfigure due to HW restart | |
309 | * request, it is possible that the low level driver requested to stop | |
310 | * the BA session, so handle it to properly clean tid_tx data. | |
311 | */ | |
312 | mutex_lock(&sta->ampdu_mlme.mtx); | |
313 | for (i = 0; i < IEEE80211_NUM_TIDS; i++) { | |
314 | struct tid_ampdu_tx *tid_tx = | |
315 | rcu_dereference_protected_tid_tx(sta, i); | |
316 | ||
317 | if (!tid_tx) | |
318 | continue; | |
319 | ||
320 | if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) | |
321 | ieee80211_stop_tx_ba_cb(sta, i, tid_tx); | |
322 | } | |
323 | mutex_unlock(&sta->ampdu_mlme.mtx); | |
de1ede7a JB |
324 | } |
325 | ||
67c282c0 JB |
326 | void ieee80211_ba_session_work(struct work_struct *work) |
327 | { | |
328 | struct sta_info *sta = | |
329 | container_of(work, struct sta_info, ampdu_mlme.work); | |
330 | struct tid_ampdu_tx *tid_tx; | |
331 | int tid; | |
332 | ||
333 | /* | |
334 | * When this flag is set, new sessions should be | |
335 | * blocked, and existing sessions will be torn | |
336 | * down by the code that set the flag, so this | |
337 | * need not run. | |
338 | */ | |
c2c98fde | 339 | if (test_sta_flag(sta, WLAN_STA_BLOCK_BA)) |
67c282c0 JB |
340 | return; |
341 | ||
a93e3644 | 342 | mutex_lock(&sta->ampdu_mlme.mtx); |
5a306f58 | 343 | for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) { |
7c3b1dd8 JB |
344 | if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired)) |
345 | ___ieee80211_stop_rx_ba_session( | |
346 | sta, tid, WLAN_BACK_RECIPIENT, | |
53f73c09 | 347 | WLAN_REASON_QSTA_TIMEOUT, true); |
7c3b1dd8 | 348 | |
f41ccd71 SL |
349 | if (test_and_clear_bit(tid, |
350 | sta->ampdu_mlme.tid_rx_stop_requested)) | |
351 | ___ieee80211_stop_rx_ba_session( | |
352 | sta, tid, WLAN_BACK_RECIPIENT, | |
353 | WLAN_REASON_UNSPECIFIED, true); | |
354 | ||
699cb58c JB |
355 | if (test_and_clear_bit(tid, |
356 | sta->ampdu_mlme.tid_rx_manage_offl)) | |
bde59c47 JB |
357 | ___ieee80211_start_rx_ba_session(sta, 0, 0, 0, 1, tid, |
358 | IEEE80211_MAX_AMPDU_BUF, | |
359 | false, true); | |
699cb58c JB |
360 | |
361 | if (test_and_clear_bit(tid + IEEE80211_NUM_TIDS, | |
362 | sta->ampdu_mlme.tid_rx_manage_offl)) | |
363 | ___ieee80211_stop_rx_ba_session( | |
364 | sta, tid, WLAN_BACK_RECIPIENT, | |
365 | 0, false); | |
366 | ||
e562078a BG |
367 | spin_lock_bh(&sta->lock); |
368 | ||
ec034b20 JB |
369 | tid_tx = sta->ampdu_mlme.tid_start_tx[tid]; |
370 | if (tid_tx) { | |
371 | /* | |
372 | * Assign it over to the normal tid_tx array | |
373 | * where it "goes live". | |
374 | */ | |
ec034b20 JB |
375 | |
376 | sta->ampdu_mlme.tid_start_tx[tid] = NULL; | |
377 | /* could there be a race? */ | |
378 | if (sta->ampdu_mlme.tid_tx[tid]) | |
379 | kfree(tid_tx); | |
380 | else | |
381 | ieee80211_assign_tid_tx(sta, tid, tid_tx); | |
382 | spin_unlock_bh(&sta->lock); | |
67c282c0 | 383 | |
67c282c0 | 384 | ieee80211_tx_ba_session_handle_start(sta, tid); |
ec034b20 JB |
385 | continue; |
386 | } | |
e562078a | 387 | spin_unlock_bh(&sta->lock); |
ec034b20 | 388 | |
40b275b6 | 389 | tid_tx = rcu_dereference_protected_tid_tx(sta, tid); |
7a7c0a64 JB |
390 | if (!tid_tx) |
391 | continue; | |
392 | ||
393 | if (test_and_clear_bit(HT_AGG_STATE_START_CB, &tid_tx->state)) | |
394 | ieee80211_start_tx_ba_cb(sta, tid, tid_tx); | |
395 | if (test_and_clear_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state)) | |
67c282c0 | 396 | ___ieee80211_stop_tx_ba_session(sta, tid, |
c82c4a80 | 397 | AGG_STOP_LOCAL_REQUEST); |
7a7c0a64 JB |
398 | if (test_and_clear_bit(HT_AGG_STATE_STOP_CB, &tid_tx->state)) |
399 | ieee80211_stop_tx_ba_cb(sta, tid, tid_tx); | |
67c282c0 | 400 | } |
cfcdbde3 | 401 | mutex_unlock(&sta->ampdu_mlme.mtx); |
67c282c0 JB |
402 | } |
403 | ||
b8695a8f JB |
404 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
405 | const u8 *da, u16 tid, | |
406 | u16 initiator, u16 reason_code) | |
44d414db JB |
407 | { |
408 | struct ieee80211_local *local = sdata->local; | |
44d414db JB |
409 | struct sk_buff *skb; |
410 | struct ieee80211_mgmt *mgmt; | |
411 | u16 params; | |
412 | ||
413 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); | |
d15b8459 | 414 | if (!skb) |
44d414db | 415 | return; |
44d414db JB |
416 | |
417 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
b080db58 | 418 | mgmt = skb_put_zero(skb, 24); |
44d414db | 419 | memcpy(mgmt->da, da, ETH_ALEN); |
47846c9b | 420 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
8abd3f9b | 421 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
ae2772b3 TP |
422 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN || |
423 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT) | |
47846c9b | 424 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
46900298 JB |
425 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
426 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
13c40c54 AS |
427 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
428 | memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN); | |
46900298 | 429 | |
44d414db JB |
430 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
431 | IEEE80211_STYPE_ACTION); | |
432 | ||
433 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); | |
434 | ||
435 | mgmt->u.action.category = WLAN_CATEGORY_BACK; | |
436 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; | |
437 | params = (u16)(initiator << 11); /* bit 11 initiator */ | |
438 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ | |
439 | ||
440 | mgmt->u.action.u.delba.params = cpu_to_le16(params); | |
441 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); | |
442 | ||
c6e13327 | 443 | ieee80211_tx_skb(sdata, skb); |
44d414db JB |
444 | } |
445 | ||
de1ede7a JB |
446 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
447 | struct sta_info *sta, | |
448 | struct ieee80211_mgmt *mgmt, size_t len) | |
449 | { | |
de1ede7a JB |
450 | u16 tid, params; |
451 | u16 initiator; | |
de1ede7a JB |
452 | |
453 | params = le16_to_cpu(mgmt->u.action.u.delba.params); | |
454 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; | |
455 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; | |
456 | ||
bdcbd8e0 JB |
457 | ht_dbg_ratelimited(sdata, "delba from %pM (%s) tid %d reason code %d\n", |
458 | mgmt->sa, initiator ? "initiator" : "recipient", | |
459 | tid, | |
460 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); | |
de1ede7a JB |
461 | |
462 | if (initiator == WLAN_BACK_INITIATOR) | |
53f73c09 JB |
463 | __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0, |
464 | true); | |
a622ab72 | 465 | else |
c82c4a80 | 466 | __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST); |
de1ede7a | 467 | } |
0f78231b | 468 | |
57566b20 | 469 | enum nl80211_smps_mode |
470 | ieee80211_smps_mode_to_smps_mode(enum ieee80211_smps_mode smps) | |
471 | { | |
472 | switch (smps) { | |
473 | case IEEE80211_SMPS_OFF: | |
474 | return NL80211_SMPS_OFF; | |
475 | case IEEE80211_SMPS_STATIC: | |
476 | return NL80211_SMPS_STATIC; | |
477 | case IEEE80211_SMPS_DYNAMIC: | |
478 | return NL80211_SMPS_DYNAMIC; | |
479 | default: | |
480 | return NL80211_SMPS_OFF; | |
481 | } | |
482 | } | |
483 | ||
0f78231b JB |
484 | int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata, |
485 | enum ieee80211_smps_mode smps, const u8 *da, | |
486 | const u8 *bssid) | |
487 | { | |
488 | struct ieee80211_local *local = sdata->local; | |
489 | struct sk_buff *skb; | |
490 | struct ieee80211_mgmt *action_frame; | |
491 | ||
492 | /* 27 = header + category + action + smps mode */ | |
493 | skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom); | |
494 | if (!skb) | |
495 | return -ENOMEM; | |
496 | ||
497 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
4df864c1 | 498 | action_frame = skb_put(skb, 27); |
0f78231b JB |
499 | memcpy(action_frame->da, da, ETH_ALEN); |
500 | memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN); | |
501 | memcpy(action_frame->bssid, bssid, ETH_ALEN); | |
502 | action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
503 | IEEE80211_STYPE_ACTION); | |
504 | action_frame->u.action.category = WLAN_CATEGORY_HT; | |
505 | action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS; | |
506 | switch (smps) { | |
507 | case IEEE80211_SMPS_AUTOMATIC: | |
508 | case IEEE80211_SMPS_NUM_MODES: | |
509 | WARN_ON(1); | |
02049ce2 | 510 | /* fall through */ |
0f78231b JB |
511 | case IEEE80211_SMPS_OFF: |
512 | action_frame->u.action.u.ht_smps.smps_control = | |
513 | WLAN_HT_SMPS_CONTROL_DISABLED; | |
514 | break; | |
515 | case IEEE80211_SMPS_STATIC: | |
516 | action_frame->u.action.u.ht_smps.smps_control = | |
517 | WLAN_HT_SMPS_CONTROL_STATIC; | |
518 | break; | |
519 | case IEEE80211_SMPS_DYNAMIC: | |
520 | action_frame->u.action.u.ht_smps.smps_control = | |
521 | WLAN_HT_SMPS_CONTROL_DYNAMIC; | |
522 | break; | |
523 | } | |
524 | ||
525 | /* we'll do more on status of this frame */ | |
526 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; | |
527 | ieee80211_tx_skb(sdata, skb); | |
528 | ||
529 | return 0; | |
530 | } | |
d1f5b7a3 | 531 | |
687da132 | 532 | void ieee80211_request_smps_mgd_work(struct work_struct *work) |
d1f5b7a3 JB |
533 | { |
534 | struct ieee80211_sub_if_data *sdata = | |
535 | container_of(work, struct ieee80211_sub_if_data, | |
536 | u.mgd.request_smps_work); | |
537 | ||
8d61ffa5 | 538 | sdata_lock(sdata); |
687da132 EG |
539 | __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode); |
540 | sdata_unlock(sdata); | |
541 | } | |
542 | ||
543 | void ieee80211_request_smps_ap_work(struct work_struct *work) | |
544 | { | |
545 | struct ieee80211_sub_if_data *sdata = | |
546 | container_of(work, struct ieee80211_sub_if_data, | |
547 | u.ap.request_smps_work); | |
548 | ||
549 | sdata_lock(sdata); | |
8ffcc704 EG |
550 | if (sdata_dereference(sdata->u.ap.beacon, sdata)) |
551 | __ieee80211_request_smps_ap(sdata, | |
552 | sdata->u.ap.driver_smps_mode); | |
8d61ffa5 | 553 | sdata_unlock(sdata); |
d1f5b7a3 JB |
554 | } |
555 | ||
556 | void ieee80211_request_smps(struct ieee80211_vif *vif, | |
557 | enum ieee80211_smps_mode smps_mode) | |
558 | { | |
559 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
560 | ||
687da132 EG |
561 | if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION && |
562 | vif->type != NL80211_IFTYPE_AP)) | |
d1f5b7a3 JB |
563 | return; |
564 | ||
687da132 EG |
565 | if (vif->type == NL80211_IFTYPE_STATION) { |
566 | if (sdata->u.mgd.driver_smps_mode == smps_mode) | |
567 | return; | |
568 | sdata->u.mgd.driver_smps_mode = smps_mode; | |
569 | ieee80211_queue_work(&sdata->local->hw, | |
570 | &sdata->u.mgd.request_smps_work); | |
571 | } else { | |
572 | /* AUTOMATIC is meaningless in AP mode */ | |
573 | if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC)) | |
574 | return; | |
575 | if (sdata->u.ap.driver_smps_mode == smps_mode) | |
576 | return; | |
577 | sdata->u.ap.driver_smps_mode = smps_mode; | |
578 | ieee80211_queue_work(&sdata->local->hw, | |
579 | &sdata->u.ap.request_smps_work); | |
580 | } | |
d1f5b7a3 JB |
581 | } |
582 | /* this might change ... don't want non-open drivers using it */ | |
583 | EXPORT_SYMBOL_GPL(ieee80211_request_smps); |