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00016 #include <linux/ieee80211.h>
00017 #include <linux/export.h>
00018 #include <net/mac80211.h>
00019 #include "ieee80211_i.h"
00020 #include "rate.h"
00021
00022 static void __check_htcap_disable(struct ieee80211_sub_if_data *sdata,
00023 struct ieee80211_sta_ht_cap *ht_cap,
00024 u16 flag)
00025 {
00026 __le16 le_flag = cpu_to_le16(flag);
00027 if (sdata->u.mgd.ht_capa_mask.cap_info & le_flag) {
00028 if (!(sdata->u.mgd.ht_capa.cap_info & le_flag))
00029 ht_cap->cap &= ~flag;
00030 }
00031 }
00032
00033 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
00034 struct ieee80211_sta_ht_cap *ht_cap)
00035 {
00036 u8 *scaps = (u8 *)(&sdata->u.mgd.ht_capa.mcs.rx_mask);
00037 u8 *smask = (u8 *)(&sdata->u.mgd.ht_capa_mask.mcs.rx_mask);
00038 int i;
00039
00040 if (sdata->vif.type != NL80211_IFTYPE_STATION) {
00041
00042
00043
00044 return;
00045 }
00046
00047
00048
00049
00050
00051
00052
00053
00054 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) {
00055 u8 m = smask[i];
00056 ht_cap->mcs.rx_mask[i] &= ~m;
00057
00058 ht_cap->mcs.rx_mask[i] |= (m & scaps[i]);
00059 }
00060
00061
00062 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SUP_WIDTH_20_40);
00063 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_SGI_40);
00064
00065
00066 __check_htcap_disable(sdata, ht_cap, IEEE80211_HT_CAP_MAX_AMSDU);
00067
00068
00069 if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
00070 IEEE80211_HT_AMPDU_PARM_FACTOR) {
00071 u8 n = sdata->u.mgd.ht_capa.ampdu_params_info
00072 & IEEE80211_HT_AMPDU_PARM_FACTOR;
00073 if (n < ht_cap->ampdu_factor)
00074 ht_cap->ampdu_factor = n;
00075 }
00076
00077
00078 if (sdata->u.mgd.ht_capa_mask.ampdu_params_info &
00079 IEEE80211_HT_AMPDU_PARM_DENSITY) {
00080 u8 n = (sdata->u.mgd.ht_capa.ampdu_params_info &
00081 IEEE80211_HT_AMPDU_PARM_DENSITY)
00082 >> IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT;
00083 if (n > ht_cap->ampdu_density)
00084 ht_cap->ampdu_density = n;
00085 }
00086 }
00087
00088
00089 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
00090 struct ieee80211_supported_band *sband,
00091 struct ieee80211_ht_cap *ht_cap_ie,
00092 struct ieee80211_sta_ht_cap *ht_cap)
00093 {
00094 u8 ampdu_info, tx_mcs_set_cap;
00095 int i, max_tx_streams;
00096
00097 BUG_ON(!ht_cap);
00098
00099 memset(ht_cap, 0, sizeof(*ht_cap));
00100
00101 if (!ht_cap_ie || !sband->ht_cap.ht_supported)
00102 return;
00103
00104 ht_cap->ht_supported = true;
00105
00106
00107
00108
00109
00110
00111
00112 ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
00113 (sband->ht_cap.cap |
00114 ~(IEEE80211_HT_CAP_LDPC_CODING |
00115 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
00116 IEEE80211_HT_CAP_GRN_FLD |
00117 IEEE80211_HT_CAP_SGI_20 |
00118 IEEE80211_HT_CAP_SGI_40 |
00119 IEEE80211_HT_CAP_DSSSCCK40));
00120
00121
00122
00123
00124 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
00125 ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
00126 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
00127 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
00128
00129 ampdu_info = ht_cap_ie->ampdu_params_info;
00130 ht_cap->ampdu_factor =
00131 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
00132 ht_cap->ampdu_density =
00133 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
00134
00135
00136 tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;
00137
00138
00139 ht_cap->mcs.tx_params = ht_cap_ie->mcs.tx_params;
00140
00141
00142 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
00143 return;
00144
00145
00146 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
00147 max_tx_streams =
00148 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
00149 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
00150 else
00151 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
00152
00153
00154
00155
00156
00157
00158
00159
00160 for (i = 0; i < max_tx_streams; i++)
00161 ht_cap->mcs.rx_mask[i] =
00162 sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
00163
00164 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
00165 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
00166 i < IEEE80211_HT_MCS_MASK_LEN; i++)
00167 ht_cap->mcs.rx_mask[i] =
00168 sband->ht_cap.mcs.rx_mask[i] &
00169 ht_cap_ie->mcs.rx_mask[i];
00170
00171
00172 if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
00173 ht_cap->mcs.rx_mask[32/8] |= 1;
00174
00175
00176
00177
00178
00179 ieee80211_apply_htcap_overrides(sdata, ht_cap);
00180 }
00181
00182 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta, bool tx)
00183 {
00184 int i;
00185
00186 cancel_work_sync(&sta->ampdu_mlme.work);
00187
00188 for (i = 0; i < STA_TID_NUM; i++) {
00189 __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR, tx);
00190 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
00191 WLAN_REASON_QSTA_LEAVE_QBSS, tx);
00192 }
00193 }
00194
00195 void ieee80211_ba_session_work(struct work_struct *work)
00196 {
00197 struct sta_info *sta =
00198 container_of(work, struct sta_info, ampdu_mlme.work);
00199 struct tid_ampdu_tx *tid_tx;
00200 int tid;
00201
00202
00203
00204
00205
00206
00207
00208 if (test_sta_flag(sta, WLAN_STA_BLOCK_BA))
00209 return;
00210
00211 mutex_lock(&sta->ampdu_mlme.mtx);
00212 for (tid = 0; tid < STA_TID_NUM; tid++) {
00213 if (test_and_clear_bit(tid, sta->ampdu_mlme.tid_rx_timer_expired))
00214 ___ieee80211_stop_rx_ba_session(
00215 sta, tid, WLAN_BACK_RECIPIENT,
00216 WLAN_REASON_QSTA_TIMEOUT, true);
00217
00218 if (test_and_clear_bit(tid,
00219 sta->ampdu_mlme.tid_rx_stop_requested))
00220 ___ieee80211_stop_rx_ba_session(
00221 sta, tid, WLAN_BACK_RECIPIENT,
00222 WLAN_REASON_UNSPECIFIED, true);
00223
00224 tid_tx = sta->ampdu_mlme.tid_start_tx[tid];
00225 if (tid_tx) {
00226
00227
00228
00229
00230 spin_lock_bh(&sta->lock);
00231
00232 sta->ampdu_mlme.tid_start_tx[tid] = NULL;
00233
00234 if (sta->ampdu_mlme.tid_tx[tid])
00235 kfree(tid_tx);
00236 else
00237 ieee80211_assign_tid_tx(sta, tid, tid_tx);
00238 spin_unlock_bh(&sta->lock);
00239
00240 ieee80211_tx_ba_session_handle_start(sta, tid);
00241 continue;
00242 }
00243
00244 tid_tx = rcu_dereference_protected_tid_tx(sta, tid);
00245 if (tid_tx && test_and_clear_bit(HT_AGG_STATE_WANT_STOP,
00246 &tid_tx->state))
00247 ___ieee80211_stop_tx_ba_session(sta, tid,
00248 WLAN_BACK_INITIATOR,
00249 true);
00250 }
00251 mutex_unlock(&sta->ampdu_mlme.mtx);
00252 }
00253
00254 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
00255 const u8 *da, u16 tid,
00256 u16 initiator, u16 reason_code)
00257 {
00258 struct ieee80211_local *local = sdata->local;
00259 struct sk_buff *skb;
00260 struct ieee80211_mgmt *mgmt;
00261 u16 params;
00262
00263 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
00264 if (!skb)
00265 return;
00266
00267 skb_reserve(skb, local->hw.extra_tx_headroom);
00268 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
00269 memset(mgmt, 0, 24);
00270 memcpy(mgmt->da, da, ETH_ALEN);
00271 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
00272 if (sdata->vif.type == NL80211_IFTYPE_AP ||
00273 sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
00274 sdata->vif.type == NL80211_IFTYPE_MESH_POINT)
00275 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
00276 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
00277 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
00278 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
00279 memcpy(mgmt->bssid, sdata->u.ibss.bssid, ETH_ALEN);
00280
00281 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
00282 IEEE80211_STYPE_ACTION);
00283
00284 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
00285
00286 mgmt->u.action.category = WLAN_CATEGORY_BACK;
00287 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
00288 params = (u16)(initiator << 11);
00289 params |= (u16)(tid << 12);
00290
00291 mgmt->u.action.u.delba.params = cpu_to_le16(params);
00292 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
00293
00294 ieee80211_tx_skb_tid(sdata, skb, tid);
00295 }
00296
00297 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
00298 struct sta_info *sta,
00299 struct ieee80211_mgmt *mgmt, size_t len)
00300 {
00301 u16 tid, params;
00302 u16 initiator;
00303
00304 params = le16_to_cpu(mgmt->u.action.u.delba.params);
00305 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
00306 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
00307
00308 #ifdef CONFIG_MAC80211_HT_DEBUG
00309 net_dbg_ratelimited("delba from %pM (%s) tid %d reason code %d\n",
00310 mgmt->sa, initiator ? "initiator" : "recipient",
00311 tid,
00312 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
00313 #endif
00314
00315 if (initiator == WLAN_BACK_INITIATOR)
00316 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0,
00317 true);
00318 else
00319 __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT,
00320 true);
00321 }
00322
00323 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
00324 enum ieee80211_smps_mode smps, const u8 *da,
00325 const u8 *bssid)
00326 {
00327 struct ieee80211_local *local = sdata->local;
00328 struct sk_buff *skb;
00329 struct ieee80211_mgmt *action_frame;
00330
00331
00332 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
00333 if (!skb)
00334 return -ENOMEM;
00335
00336 skb_reserve(skb, local->hw.extra_tx_headroom);
00337 action_frame = (void *)skb_put(skb, 27);
00338 memcpy(action_frame->da, da, ETH_ALEN);
00339 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
00340 memcpy(action_frame->bssid, bssid, ETH_ALEN);
00341 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
00342 IEEE80211_STYPE_ACTION);
00343 action_frame->u.action.category = WLAN_CATEGORY_HT;
00344 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
00345 switch (smps) {
00346 case IEEE80211_SMPS_AUTOMATIC:
00347 case IEEE80211_SMPS_NUM_MODES:
00348 WARN_ON(1);
00349 case IEEE80211_SMPS_OFF:
00350 action_frame->u.action.u.ht_smps.smps_control =
00351 WLAN_HT_SMPS_CONTROL_DISABLED;
00352 break;
00353 case IEEE80211_SMPS_STATIC:
00354 action_frame->u.action.u.ht_smps.smps_control =
00355 WLAN_HT_SMPS_CONTROL_STATIC;
00356 break;
00357 case IEEE80211_SMPS_DYNAMIC:
00358 action_frame->u.action.u.ht_smps.smps_control =
00359 WLAN_HT_SMPS_CONTROL_DYNAMIC;
00360 break;
00361 }
00362
00363
00364 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
00365 ieee80211_tx_skb(sdata, skb);
00366
00367 return 0;
00368 }
00369
00370 void ieee80211_request_smps_work(struct work_struct *work)
00371 {
00372 struct ieee80211_sub_if_data *sdata =
00373 container_of(work, struct ieee80211_sub_if_data,
00374 u.mgd.request_smps_work);
00375
00376 mutex_lock(&sdata->u.mgd.mtx);
00377 __ieee80211_request_smps(sdata, sdata->u.mgd.driver_smps_mode);
00378 mutex_unlock(&sdata->u.mgd.mtx);
00379 }
00380
00381 void ieee80211_request_smps(struct ieee80211_vif *vif,
00382 enum ieee80211_smps_mode smps_mode)
00383 {
00384 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
00385
00386 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
00387 return;
00388
00389 if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
00390 smps_mode = IEEE80211_SMPS_AUTOMATIC;
00391
00392 sdata->u.mgd.driver_smps_mode = smps_mode;
00393
00394 ieee80211_queue_work(&sdata->local->hw,
00395 &sdata->u.mgd.request_smps_work);
00396 }
00397
00398 EXPORT_SYMBOL_GPL(ieee80211_request_smps);