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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
Jouni Malinen9a07bf52014-04-15 19:13:56 +030034static 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
Ben Greearef96a8422011-11-18 11:32:00 -080046void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
47 struct ieee80211_sta_ht_cap *ht_cap)
48{
Simon Wunderlich822854b2013-06-28 10:39:59 +020049 struct ieee80211_ht_cap *ht_capa, *ht_capa_mask;
50 u8 *scaps, *smask;
Ben Greearef96a8422011-11-18 11:32:00 -080051 int i;
52
Johannes Berge1a0c6b2013-02-07 11:47:44 +010053 if (!ht_cap->ht_supported)
54 return;
55
Simon Wunderlich822854b2013-06-28 10:39:59 +020056 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
Ben Greearef96a8422011-11-18 11:32:00 -080073 /* NOTE: If you add more over-rides here, update register_hw
Jouni Malinen9a07bf52014-04-15 19:13:56 +030074 * ht_capa_mod_mask logic in main.c as well.
Ben Greearef96a8422011-11-18 11:32:00 -080075 * 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? */
Simon Wunderlich822854b2013-06-28 10:39:59 +020088 __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);
Ben Greearef96a8422011-11-18 11:32:00 -080092
Ben Greearbc0784d2012-12-12 16:56:20 -080093 /* Allow user to disable SGI-20 (SGI-40 is handled above) */
Simon Wunderlich822854b2013-06-28 10:39:59 +020094 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
95 IEEE80211_HT_CAP_SGI_20);
Ben Greearbc0784d2012-12-12 16:56:20 -080096
Ben Greearef96a8422011-11-18 11:32:00 -080097 /* Allow user to disable the max-AMSDU bit. */
Simon Wunderlich822854b2013-06-28 10:39:59 +020098 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
99 IEEE80211_HT_CAP_MAX_AMSDU);
Ben Greearef96a8422011-11-18 11:32:00 -0800100
Pawel Kulakowskia2e74952014-04-01 07:13:21 +0200101 /* Allow user to disable LDPC */
102 __check_htcap_disable(ht_capa, ht_capa_mask, ht_cap,
103 IEEE80211_HT_CAP_LDPC_CODING);
104
Jouni Malinen9a07bf52014-04-15 19:13:56 +0300105 /* 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
Ben Greearef96a8422011-11-18 11:32:00 -0800109 /* Allow user to decrease AMPDU factor */
Simon Wunderlich822854b2013-06-28 10:39:59 +0200110 if (ht_capa_mask->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -0800111 IEEE80211_HT_AMPDU_PARM_FACTOR) {
Simon Wunderlich822854b2013-06-28 10:39:59 +0200112 u8 n = ht_capa->ampdu_params_info &
113 IEEE80211_HT_AMPDU_PARM_FACTOR;
Ben Greearef96a8422011-11-18 11:32:00 -0800114 if (n < ht_cap->ampdu_factor)
115 ht_cap->ampdu_factor = n;
116 }
117
118 /* Allow the user to increase AMPDU density. */
Simon Wunderlich822854b2013-06-28 10:39:59 +0200119 if (ht_capa_mask->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -0800120 IEEE80211_HT_AMPDU_PARM_DENSITY) {
Simon Wunderlich822854b2013-06-28 10:39:59 +0200121 u8 n = (ht_capa->ampdu_params_info &
Ben Greearef96a8422011-11-18 11:32:00 -0800122 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100130bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
Ben Greearef96a8422011-11-18 11:32:00 -0800131 struct ieee80211_supported_band *sband,
Johannes Berg4a3cb702013-02-12 16:43:19 +0100132 const struct ieee80211_ht_cap *ht_cap_ie,
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100133 struct sta_info *sta)
Johannes Berg44d414d2008-09-08 17:44:28 +0200134{
Johannes Bergc07270b2013-03-01 11:54:43 +0100135 struct ieee80211_sta_ht_cap ht_cap, own_cap;
Johannes Bergae5eb022008-10-14 16:58:37 +0200136 u8 ampdu_info, tx_mcs_set_cap;
137 int i, max_tx_streams;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100138 bool changed;
139 enum ieee80211_sta_rx_bandwidth bw;
Johannes Bergaf0ed692013-02-12 14:21:00 +0100140 enum ieee80211_smps_mode smps_mode;
Johannes Berg44d414d2008-09-08 17:44:28 +0200141
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100142 memset(&ht_cap, 0, sizeof(ht_cap));
Johannes Berg44d414d2008-09-08 17:44:28 +0200143
Christian Lamparter15804e32010-07-16 13:01:24 +0200144 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100145 goto apply;
Johannes Berg44d414d2008-09-08 17:44:28 +0200146
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100147 ht_cap.ht_supported = true;
Johannes Berg44d414d2008-09-08 17:44:28 +0200148
Johannes Bergc07270b2013-03-01 11:54:43 +0100149 own_cap = sband->ht_cap;
150
151 /*
152 * If user has specified capability over-rides, take care
Arik Nemtsov13cc8a42014-07-17 17:14:26 +0300153 * of that if the station we're setting up is the AP or TDLS peer that
Johannes Bergc07270b2013-03-01 11:54:43 +0100154 * we advertised a restricted capability set to. Override
155 * our own capabilities and then use those below.
156 */
Arik Nemtsov13cc8a42014-07-17 17:14:26 +0300157 if (sdata->vif.type == NL80211_IFTYPE_STATION ||
158 sdata->vif.type == NL80211_IFTYPE_ADHOC)
Johannes Bergc07270b2013-03-01 11:54:43 +0100159 ieee80211_apply_htcap_overrides(sdata, &own_cap);
160
Johannes Berg9a418af2009-12-17 13:55:48 +0100161 /*
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 */
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100167 ht_cap.cap = le16_to_cpu(ht_cap_ie->cap_info) &
Johannes Bergc07270b2013-03-01 11:54:43 +0100168 (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));
Johannes Berg21add822012-12-28 15:01:57 +0100174
Johannes Berg9a418af2009-12-17 13:55:48 +0100175 /*
176 * The STBC bits are asymmetric -- if we don't have
177 * TX then mask out the peer's RX and vice versa.
178 */
Johannes Bergc07270b2013-03-01 11:54:43 +0100179 if (!(own_cap.cap & IEEE80211_HT_CAP_TX_STBC))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100180 ht_cap.cap &= ~IEEE80211_HT_CAP_RX_STBC;
Johannes Bergc07270b2013-03-01 11:54:43 +0100181 if (!(own_cap.cap & IEEE80211_HT_CAP_RX_STBC))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100182 ht_cap.cap &= ~IEEE80211_HT_CAP_TX_STBC;
Johannes Berg44d414d2008-09-08 17:44:28 +0200183
Johannes Bergae5eb022008-10-14 16:58:37 +0200184 ampdu_info = ht_cap_ie->ampdu_params_info;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100185 ht_cap.ampdu_factor =
Johannes Bergae5eb022008-10-14 16:58:37 +0200186 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100187 ht_cap.ampdu_density =
Johannes Bergae5eb022008-10-14 16:58:37 +0200188 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200189
190 /* own MCS TX capabilities */
Johannes Bergc07270b2013-03-01 11:54:43 +0100191 tx_mcs_set_cap = own_cap.mcs.tx_params;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200192
Johannes Berg90b4ca92011-02-25 12:24:10 +0100193 /* Copy peer MCS TX capabilities, the driver might need them. */
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100194 ht_cap.mcs.tx_params = ht_cap_ie->mcs.tx_params;
Johannes Berg90b4ca92011-02-25 12:24:10 +0100195
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200196 /* can we TX with MCS rates? */
197 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100198 goto apply;
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200199
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 /*
Johannes Berg90b4ca92011-02-25 12:24:10 +0100209 * 802.11n-2009 20.3.5 / 20.6 says:
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200210 * - 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++)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100216 ht_cap.mcs.rx_mask[i] =
Johannes Bergc07270b2013-03-01 11:54:43 +0100217 own_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200218
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++)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100222 ht_cap.mcs.rx_mask[i] =
Johannes Bergc07270b2013-03-01 11:54:43 +0100223 own_cap.mcs.rx_mask[i] &
Johannes Bergae5eb022008-10-14 16:58:37 +0200224 ht_cap_ie->mcs.rx_mask[i];
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200225
226 /* handle MCS rate 32 too */
Johannes Bergc07270b2013-03-01 11:54:43 +0100227 if (own_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100228 ht_cap.mcs.rx_mask[32/8] |= 1;
Ben Greearef96a8422011-11-18 11:32:00 -0800229
Arik Nemtsovdc5943d2014-07-17 17:14:27 +0300230 /* set Rx highest rate */
231 ht_cap.mcs.rx_highest = ht_cap_ie->mcs.rx_highest;
232
Emmanuel Grumbach506bcfa2015-12-13 15:41:05 +0200233 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100238 apply:
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100239 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100260 sta->sta.bandwidth = bw;
261
Johannes Berg0af83d32012-12-27 18:55:36 +0100262 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
Johannes Bergaf0ed692013-02-12 14:21:00 +0100266 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
Johannes Berge1a0c6b2013-02-07 11:47:44 +0100284 return changed;
Johannes Bergae5eb022008-10-14 16:58:37 +0200285}
Johannes Bergd9fe60d2008-10-09 12:13:49 +0200286
Johannes Bergc82c4a82012-07-18 13:31:31 +0200287void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
288 enum ieee80211_agg_stop_reason reason)
Johannes Berg44d414d2008-09-08 17:44:28 +0200289{
Johannes Bergb8695a82009-02-10 21:25:46 +0100290 int i;
Johannes Berg44d414d2008-09-08 17:44:28 +0200291
Johannes Berg0ab33702010-06-10 10:21:42 +0200292 cancel_work_sync(&sta->ampdu_mlme.work);
293
Johannes Berg5a306f52012-11-14 23:22:21 +0100294 for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
Johannes Bergc82c4a82012-07-18 13:31:31 +0200295 __ieee80211_stop_tx_ba_session(sta, i, reason);
Johannes Berg849b7962009-02-10 21:25:54 +0100296 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
Johannes Bergc82c4a82012-07-18 13:31:31 +0200297 WLAN_REASON_QSTA_LEAVE_QBSS,
298 reason != AGG_STOP_DESTROY_STA &&
299 reason != AGG_STOP_PEER_REQUEST);
Johannes Berg44d414d2008-09-08 17:44:28 +0200300 }
Johannes Berg44d414d2008-09-08 17:44:28 +0200301}
302
Johannes Berg67c282c2010-06-10 10:21:43 +0200303void 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 */
Johannes Bergc2c98fd2011-09-29 16:04:36 +0200316 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
Johannes Berg67c282c2010-06-10 10:21:43 +0200317 return;
318
Johannes Berga93e3642010-06-10 10:21:46 +0200319 mutex_lock(&sta->ampdu_mlme.mtx);
Johannes Berg5a306f52012-11-14 23:22:21 +0100320 for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200321 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,
Johannes Berg53f73c02010-10-05 19:37:40 +0200324 WLAN_REASON_QSTA_TIMEOUT, true);
Johannes Berg7c3b1dd2010-06-10 10:21:44 +0200325
Shahar Levif41ccd72011-05-22 16:10:21 +0300326 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
Ben Greeare5620782013-06-12 14:08:44 -0700332 spin_lock_bh(&sta->lock);
333
Johannes Bergec034b22011-05-13 13:35:40 +0200334 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 */
Johannes Berg67c282c2010-06-10 10:21:43 +0200340
Johannes Bergec034b22011-05-13 13:35:40 +0200341 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);
348
Johannes Berg67c282c2010-06-10 10:21:43 +0200349 ieee80211_tx_ba_session_handle_start(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200350 continue;
351 }
Ben Greeare5620782013-06-12 14:08:44 -0700352 spin_unlock_bh(&sta->lock);
Johannes Bergec034b22011-05-13 13:35:40 +0200353
Johannes Berg40b275b2011-05-13 14:15:49 +0200354 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
Johannes Bergec034b22011-05-13 13:35:40 +0200355 if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
356 &tid_tx->state))
Johannes Berg67c282c2010-06-10 10:21:43 +0200357 ___ieee80211_stop_tx_ba_session(sta, tid,
Johannes Bergc82c4a82012-07-18 13:31:31 +0200358 AGG_STOP_LOCAL_REQUEST);
Johannes Berg67c282c2010-06-10 10:21:43 +0200359 }
Johannes Bergcfcdbde2010-06-10 10:21:48 +0200360 mutex_unlock(&sta->ampdu_mlme.mtx);
Johannes Berg67c282c2010-06-10 10:21:43 +0200361}
362
Johannes Bergb8695a82009-02-10 21:25:46 +0100363void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
364 const u8 *da, u16 tid,
365 u16 initiator, u16 reason_code)
Johannes Berg44d414d2008-09-08 17:44:28 +0200366{
367 struct ieee80211_local *local = sdata->local;
Johannes Berg44d414d2008-09-08 17:44:28 +0200368 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);
Joe Perchesd15b8452011-08-29 14:17:31 -0700373 if (!skb)
Johannes Berg44d414d2008-09-08 17:44:28 +0200374 return;
Johannes Berg44d414d2008-09-08 17:44:28 +0200375
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);
Johannes Berg47846c92009-11-25 17:46:19 +0100380 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
Johannes Berg8abd3f92009-02-10 21:25:47 +0100381 if (sdata->vif.type == NL80211_IFTYPE_AP ||
Thomas Pedersenae2772b2011-10-26 14:47:29 -0700382 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
383 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
Johannes Berg47846c92009-11-25 17:46:19 +0100384 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100385 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
386 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
Alexander Simon13c40c52011-11-30 16:56:34 +0100387 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
388 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
Johannes Berg46900292009-02-15 12:44:28 +0100389
Johannes Berg44d414d2008-09-08 17:44:28 +0200390 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
Karl Beldanc6e13322014-01-23 20:06:34 +0100403 ieee80211_tx_skb(sdata, skb);
Johannes Berg44d414d2008-09-08 17:44:28 +0200404}
405
Johannes Bergde1ede72008-09-09 14:42:50 +0200406void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
407 struct sta_info *sta,
408 struct ieee80211_mgmt *mgmt, size_t len)
409{
Johannes Bergde1ede72008-09-09 14:42:50 +0200410 u16 tid, params;
411 u16 initiator;
Johannes Bergde1ede72008-09-09 14:42:50 +0200412
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
Johannes Bergbdcbd8e2012-06-22 11:29:50 +0200417 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));
Johannes Bergde1ede72008-09-09 14:42:50 +0200421
422 if (initiator == WLAN_BACK_INITIATOR)
Johannes Berg53f73c02010-10-05 19:37:40 +0200423 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
424 true);
Johannes Berga622ab72010-06-10 10:21:39 +0200425 else
Johannes Bergc82c4a82012-07-18 13:31:31 +0200426 __ieee80211_stop_tx_ba_session(sta, tid, AGG_STOP_PEER_REQUEST);
Johannes Bergde1ede72008-09-09 14:42:50 +0200427}
Johannes Berg0f782312009-12-01 13:37:02 +0100428
429int 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}
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200475
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300476void ieee80211_request_smps_mgd_work(struct work_struct *work)
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200477{
478 struct ieee80211_sub_if_data *sdata =
479 container_of(work, struct ieee80211_sub_if_data,
480 u.mgd.request_smps_work);
481
Johannes Berg8d61ffa2013-05-10 12:32:47 +0200482 sdata_lock(sdata);
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300483 __ieee80211_request_smps_mgd(sdata, sdata->u.mgd.driver_smps_mode);
484 sdata_unlock(sdata);
485}
486
487void 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);
Emmanuel Grumbach8ffcc702014-01-23 14:28:16 +0200494 if (sdata_dereference(sdata->u.ap.beacon, sdata))
495 __ieee80211_request_smps_ap(sdata,
496 sdata->u.ap.driver_smps_mode);
Johannes Berg8d61ffa2013-05-10 12:32:47 +0200497 sdata_unlock(sdata);
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200498}
499
500void 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
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300505 if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION &&
506 vif->type != NL80211_IFTYPE_AP))
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200507 return;
508
Emmanuel Grumbach687da132013-10-01 16:45:43 +0300509 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 }
Johannes Bergd1f5b7a2010-08-05 17:05:55 +0200525}
526/* this might change ... don't want non-open drivers using it */
527EXPORT_SYMBOL_GPL(ieee80211_request_smps);