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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
Simon Wunderlich822854b2013-06-28 10:39:59 +020022static void __check_htcap_disable(struct ieee80211_ht_cap *ht_capa,
23 struct ieee80211_ht_cap *ht_capa_mask,
Ben Greear32dfefa2011-11-24 11:15:21 -080024 struct ieee80211_sta_ht_cap *ht_cap,
25 u16 flag)
Ben Greearef96a8422011-11-18 11:32:00 -080026{
27 __le16 le_flag = cpu_to_le16(flag);
Simon Wunderlich822854b2013-06-28 10:39:59 +020028 if (ht_capa_mask->cap_info & le_flag) {
29 if (!(ht_capa->cap_info & le_flag))
Ben Greearef96a8422011-11-18 11:32:00 -080030 ht_cap->cap &= ~flag;
31 }
32}
33
34void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
35 struct ieee80211_sta_ht_cap *ht_cap)
36{
Simon Wunderlich822854b2013-06-28 10:39:59 +020037 struct ieee80211_ht_cap *ht_capa, *ht_capa_mask;
38 u8 *scaps, *smask;
Ben Greearef96a8422011-11-18 11:32:00 -080039 int i;
40
Johannes Berge1a0c6b2013-02-07 11:47:44 +010041 if (!ht_cap->ht_supported)
42 return;
43
Simon Wunderlich822854b2013-06-28 10:39:59 +020044 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
Ben Greearef96a8422011-11-18 11:32:00 -080061 /* 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? */
Simon Wunderlich822854b2013-06-28 10:39:59 +020076 __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);
Ben Greearef96a8422011-11-18 11:32:00 -080080
Ben Greearbc0784d2012-12-12 16:56:20 -080081 /* Allow user to disable SGI-20 (SGI-40 is handled above) */
Simon Wunderlich822854b2013-06-28 10:39:59 +020082 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
83 IEEE80211_HT_CAP_SGI_20);
Ben Greearbc0784d2012-12-12 16:56:20 -080084
Ben Greearef96a8422011-11-18 11:32:00 -080085 /* Allow user to disable the max-AMSDU bit. */
Simon Wunderlich822854b2013-06-28 10:39:59 +020086 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
87 IEEE80211_HT_CAP_MAX_AMSDU);
Ben Greearef96a8422011-11-18 11:32:00 -080088
89 /* Allow user to decrease AMPDU factor */
Simon Wunderlich822854b2013-06-28 10:39:59 +020090 if (ht_capa_mask->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -080091 IEEE80211_HT_AMPDU_PARM_FACTOR) {
Simon Wunderlich822854b2013-06-28 10:39:59 +020092 u8 n = ht_capa->ampdu_params_info &
93 IEEE80211_HT_AMPDU_PARM_FACTOR;
Ben Greearef96a8422011-11-18 11:32:00 -080094 if (n < ht_cap->ampdu_factor)
95 ht_cap->ampdu_factor = n;
96 }
97
98 /* Allow the user to increase AMPDU density. */
Simon Wunderlich822854b2013-06-28 10:39:59 +020099 if (ht_capa_mask->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -0800100 IEEE80211_HT_AMPDU_PARM_DENSITY) {
Simon Wunderlich822854b2013-06-28 10:39:59 +0200101 u8 n = (ht_capa->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -0800102 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100110bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
Ben Greearef96a8422011-11-18 11:32:00 -0800111 struct ieee80211_supported_band *sband,
Johannes Berg4a3cb702013-02-12 16:43:19 +0100112 const struct ieee80211_ht_cap *ht_cap_ie,
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100113 struct sta_info *sta)
Johannes Berg44d414d2008-09-08 17:44:28 +0200114{
Johannes Bergc07270b2013-03-01 11:54:43 +0100115 struct ieee80211_sta_ht_cap ht_cap, own_cap;
Johannes Bergae5eb022008-10-14 16:58:37 +0200116 u8 ampdu_info, tx_mcs_set_cap;
117 int i, max_tx_streams;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100118 bool changed;
119 enum ieee80211_sta_rx_bandwidth bw;
Johannes Bergaf0ed692013-02-12 14:21:00 +0100120 enum ieee80211_smps_mode smps_mode;
Johannes Berg44d414d2008-09-08 17:44:28 +0200121
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100122 memset(&ht_cap, 0, sizeof(ht_cap));
Johannes Berg44d414d2008-09-08 17:44:28 +0200123
Christian Lamparter15804e32010-07-16 13:01:24 +0200124 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100125 goto apply;
Johannes Berg44d414d2008-09-08 17:44:28 +0200126
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100127 ht_cap.ht_supported = true;
Johannes Berg44d414d2008-09-08 17:44:28 +0200128
Johannes Bergc07270b2013-03-01 11:54:43 +0100129 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 */
Simon Wunderlich822854b2013-06-28 10:39:59 +0200137 if ((sdata->vif.type == NL80211_IFTYPE_STATION ||
138 sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
Johannes Bergc07270b2013-03-01 11:54:43 +0100139 !test_sta_flag(sta, WLAN_STA_TDLS_PEER))
140 ieee80211_apply_htcap_overrides(sdata, &own_cap);
141
Johannes Berg9a418af2009-12-17 13:55:48 +0100142 /*
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 */
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100148 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
Johannes Bergc07270b2013-03-01 11:54:43 +0100149 (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));
Johannes Berg21add822012-12-28 15:01:57 +0100155
Johannes Berg9a418af2009-12-17 13:55:48 +0100156 /*
157 * The STBC bits are asymmetric -- if we don't have
158 * TX then mask out the peer's RX and vice versa.
159 */
Johannes Bergc07270b2013-03-01 11:54:43 +0100160 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100161 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
Johannes Bergc07270b2013-03-01 11:54:43 +0100162 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100163 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
Johannes Berg44d414d2008-09-08 17:44:28 +0200164
Johannes Bergae5eb022008-10-14 16:58:37 +0200165 ampdu_info = ht_cap_ie->ampdu_params_info;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100166 ht_cap.ampdu_factor =
Johannes Bergae5eb022008-10-14 16:58:37 +0200167 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100168 ht_cap.ampdu_density =
Johannes Bergae5eb022008-10-14 16:58:37 +0200169 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200170
171 /* own MCS TX capabilities */
Johannes Bergc07270b2013-03-01 11:54:43 +0100172 tx_mcs_set_cap = own_cap.mcs.tx_params;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200173
Johannes Berg90b4ca92011-02-25 12:24:10 +0100174 /* Copy peer MCS TX capabilities, the driver might need them. */
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100175 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
Johannes Berg90b4ca92011-02-25 12:24:10 +0100176
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200177 /* can we TX with MCS rates? */
178 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100179 goto apply;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200180
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 /*
Johannes Berg90b4ca92011-02-25 12:24:10 +0100190 * 802.11n-2009 20.3.5 / 20.6 says:
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200191 * - 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++)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100197 ht_cap.mcs.rx_mask[i] =
Johannes Bergc07270b2013-03-01 11:54:43 +0100198 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200199
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++)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100203 ht_cap.mcs.rx_mask[i] =
Johannes Bergc07270b2013-03-01 11:54:43 +0100204 own_cap.mcs.rx_mask[i] &
Johannes Bergae5eb022008-10-14 16:58:37 +0200205 ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200206
207 /* handle MCS rate 32 too */
Johannes Bergc07270b2013-03-01 11:54:43 +0100208 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100209 ht_cap.mcs.rx_mask[32/8] |= 1;
Ben Greearef96a8422011-11-18 11:32:00 -0800210
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100211 apply:
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100212 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
Johannes Berg0af83d32012-12-27 18:55:36 +0100237 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
Johannes Bergaf0ed692013-02-12 14:21:00 +0100241 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100259 return changed;
Johannes Bergae5eb022008-10-14 16:58:37 +0200260}
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200261
Johannes Bergc82c4a82012-07-18 13:31:31 +0200262void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
263 enum ieee80211_agg_stop_reason reason)
Johannes Berg44d414d2008-09-08 17:44:28 +0200264{
Johannes Bergb8695a82009-02-10 21:25:46 +0100265 int i;
Johannes Berg44d414d2008-09-08 17:44:28 +0200266
Johannes Berg0ab33702010-06-10 10:21:42 +0200267 cancel_work_sync(&sta->ampdu_mlme.work);
268
Johannes Berg5a306f52012-11-14 23:22:21 +0100269 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
Johannes Bergc82c4a82012-07-18 13:31:31 +0200270 __ieee80211_stop_tx_ba_session(sta, i, reason);
Johannes Berg849b7962009-02-10 21:25:54 +0100271 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
Johannes Bergc82c4a82012-07-18 13:31:31 +0200272 WLAN_REASON_QSTA_LEAVE_QBSS,
273 reason != AGG_STOP_DESTROY_STA &&
274 reason != AGG_STOP_PEER_REQUEST);
Johannes Berg44d414d2008-09-08 17:44:28 +0200275 }
Johannes Berg44d414d2008-09-08 17:44:28 +0200276}
277
Johannes Berg67c282c2010-06-10 10:21:43 +0200278void 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 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200291 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
Johannes Berg67c282c2010-06-10 10:21:43 +0200292 return;
293
Johannes Berga93e3642010-06-10 10:21:46 +0200294 mutex_lock(&sta->ampdu_mlme.mtx);
Johannes Berg5a306f52012-11-14 23:22:21 +0100295 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200296 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,
Johannes Berg53f73c02010-10-05 19:37:40 +0200299 WLAN_REASON_QSTA_TIMEOUT, true);
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200300
Shahar Levif41ccd72011-05-22 16:10:21 +0300301 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
Ben Greeare5620782013-06-12 14:08:44 -0700307 spin_lock_bh(&sta->lock);
308
Johannes Bergec034b22011-05-13 13:35:40 +0200309 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 */
Johannes Berg67c282c2010-06-10 10:21:43 +0200315
Johannes Bergec034b22011-05-13 13:35:40 +0200316 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);
323
Johannes Berg67c282c2010-06-10 10:21:43 +0200324 ieee80211_tx_ba_session_handle_start(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200325 continue;
326 }
Ben Greeare5620782013-06-12 14:08:44 -0700327 spin_unlock_bh(&sta->lock);
Johannes Bergec034b22011-05-13 13:35:40 +0200328
Johannes Berg40b275b2011-05-13 14:15:49 +0200329 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200330 if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
331 &tid_tx->state))
Johannes Berg67c282c2010-06-10 10:21:43 +0200332 ___ieee80211_stop_tx_ba_session(sta, tid,
Johannes Bergc82c4a82012-07-18 13:31:31 +0200333 AGG_STOP_LOCAL_REQUEST);
Johannes Berg67c282c2010-06-10 10:21:43 +0200334 }
Johannes Bergcfcdbde2010-06-10 10:21:48 +0200335 mutex_unlock(&sta->ampdu_mlme.mtx);
Johannes Berg67c282c2010-06-10 10:21:43 +0200336}
337
Johannes Bergb8695a82009-02-10 21:25:46 +0100338void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
339 const u8 *da, u16 tid,
340 u16 initiator, u16 reason_code)
Johannes Berg44d414d2008-09-08 17:44:28 +0200341{
342 struct ieee80211_local *local = sdata->local;
Johannes Berg44d414d2008-09-08 17:44:28 +0200343 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);
Joe Perchesd15b8452011-08-29 14:17:31 -0700348 if (!skb)
Johannes Berg44d414d2008-09-08 17:44:28 +0200349 return;
Johannes Berg44d414d2008-09-08 17:44:28 +0200350
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);
Johannes Berg47846c92009-11-25 17:46:19 +0100355 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg8abd3f92009-02-10 21:25:47 +0100356 if (sdata->vif.type == NL80211_IFTYPE_AP ||
Thomas Pedersenae2772b2011-10-26 14:47:29 -0700357 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
358 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Johannes Berg47846c92009-11-25 17:46:19 +0100359 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100360 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
361 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
Alexander Simon13c40c52011-11-30 16:56:34 +0100362 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
363 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100364
Johannes Berg44d414d2008-09-08 17:44:28 +0200365 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
Helmut Schaacf6bb792011-12-15 10:18:34 +0100378 ieee80211_tx_skb_tid(sdata, skb, tid);
Johannes Berg44d414d2008-09-08 17:44:28 +0200379}
380
Johannes Bergde1ede72008-09-09 14:42:50 +0200381void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
382 struct sta_info *sta,
383 struct ieee80211_mgmt *mgmt, size_t len)
384{
Johannes Bergde1ede72008-09-09 14:42:50 +0200385 u16 tid, params;
386 u16 initiator;
Johannes Bergde1ede72008-09-09 14:42:50 +0200387
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
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200392 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));
Johannes Bergde1ede72008-09-09 14:42:50 +0200396
397 if (initiator == WLAN_BACK_INITIATOR)
Johannes Berg53f73c02010-10-05 19:37:40 +0200398 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
399 true);
Johannes Berga622ab72010-06-10 10:21:39 +0200400 else
Johannes Bergc82c4a82012-07-18 13:31:31 +0200401 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
Johannes Bergde1ede72008-09-09 14:42:50 +0200402}
Johannes Berg0f782312009-12-01 13:37:02 +0100403
404int 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}
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200450
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300451void ieee80211_request_smps_mgd_work(struct work_struct *work)
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200452{
453 struct ieee80211_sub_if_data *sdata =
454 container_of(work, struct ieee80211_sub_if_data,
455 u.mgd.request_smps_work);
456
Johannes Berg8d61ffa2013-05-10 12:32:47 +0200457 sdata_lock(sdata);
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300458 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
459 sdata_unlock(sdata);
460}
461
462void 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);
Johannes Berg8d61ffa2013-05-10 12:32:47 +0200470 sdata_unlock(sdata);
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200471}
472
473void 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
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300478 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION &&
479 vif->type != NL80211_IFTYPE_AP))
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200480 return;
481
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300482 if (vif->type == NL80211_IFTYPE_STATION) {
Emmanuel Grumbach349b1962014-01-07 13:11:41 +0200483 if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
484 smps_mode = IEEE80211_SMPS_AUTOMATIC;
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300485 if (sdata->u.mgd.driver_smps_mode == smps_mode)
486 return;
487 sdata->u.mgd.driver_smps_mode = smps_mode;
488 ieee80211_queue_work(&sdata->local->hw,
489 &sdata->u.mgd.request_smps_work);
490 } else {
491 /* AUTOMATIC is meaningless in AP mode */
492 if (WARN_ON_ONCE(smps_mode == IEEE80211_SMPS_AUTOMATIC))
493 return;
494 if (sdata->u.ap.driver_smps_mode == smps_mode)
495 return;
496 sdata->u.ap.driver_smps_mode = smps_mode;
497 ieee80211_queue_work(&sdata->local->hw,
498 &sdata->u.ap.request_smps_work);
499 }
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200500}
501/* this might change ... don't want non-open drivers using it */
502EXPORT_SYMBOL_GPL(ieee80211_request_smps);