4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2007-2008, Intel Corporation
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.
16 #include <linux/ieee80211.h>
17 #include <net/mac80211.h>
18 #include "ieee80211_i.h"
21 void ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_supported_band *sband,
22 struct ieee80211_ht_cap *ht_cap_ie,
23 struct ieee80211_sta_ht_cap *ht_cap)
25 u8 ampdu_info, tx_mcs_set_cap;
26 int i, max_tx_streams;
30 memset(ht_cap, 0, sizeof(*ht_cap));
35 ht_cap->ht_supported = true;
38 * The bits listed in this expression should be
39 * the same for the peer and us, if the station
40 * advertises more then we can't use those thus
43 ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) &
45 ~(IEEE80211_HT_CAP_LDPC_CODING |
46 IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
47 IEEE80211_HT_CAP_GRN_FLD |
48 IEEE80211_HT_CAP_SGI_20 |
49 IEEE80211_HT_CAP_SGI_40 |
50 IEEE80211_HT_CAP_DSSSCCK40));
52 * The STBC bits are asymmetric -- if we don't have
53 * TX then mask out the peer's RX and vice versa.
55 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_TX_STBC))
56 ht_cap->cap &= ~IEEE80211_HT_CAP_RX_STBC;
57 if (!(sband->ht_cap.cap & IEEE80211_HT_CAP_RX_STBC))
58 ht_cap->cap &= ~IEEE80211_HT_CAP_TX_STBC;
60 ampdu_info = ht_cap_ie->ampdu_params_info;
61 ht_cap->ampdu_factor =
62 ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR;
63 ht_cap->ampdu_density =
64 (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2;
66 /* own MCS TX capabilities */
67 tx_mcs_set_cap = sband->ht_cap.mcs.tx_params;
69 /* can we TX with MCS rates? */
70 if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED))
73 /* Counting from 0, therefore +1 */
74 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF)
76 ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK)
77 >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1;
79 max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS;
82 * 802.11n D5.0 20.3.5 / 20.6 says:
83 * - indices 0 to 7 and 32 are single spatial stream
84 * - 8 to 31 are multiple spatial streams using equal modulation
85 * [8..15 for two streams, 16..23 for three and 24..31 for four]
86 * - remainder are multiple spatial streams using unequal modulation
88 for (i = 0; i < max_tx_streams; i++)
89 ht_cap->mcs.rx_mask[i] =
90 sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i];
92 if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION)
93 for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE;
94 i < IEEE80211_HT_MCS_MASK_LEN; i++)
95 ht_cap->mcs.rx_mask[i] =
96 sband->ht_cap.mcs.rx_mask[i] &
97 ht_cap_ie->mcs.rx_mask[i];
99 /* handle MCS rate 32 too */
100 if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1)
101 ht_cap->mcs.rx_mask[32/8] |= 1;
104 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta)
108 cancel_work_sync(&sta->ampdu_mlme.work);
110 for (i = 0; i < STA_TID_NUM; i++) {
111 __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR);
112 __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT,
113 WLAN_REASON_QSTA_LEAVE_QBSS);
117 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
118 const u8 *da, u16 tid,
119 u16 initiator, u16 reason_code)
121 struct ieee80211_local *local = sdata->local;
123 struct ieee80211_mgmt *mgmt;
126 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
129 printk(KERN_ERR "%s: failed to allocate buffer "
130 "for delba frame\n", sdata->name);
134 skb_reserve(skb, local->hw.extra_tx_headroom);
135 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
137 memcpy(mgmt->da, da, ETH_ALEN);
138 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
139 if (sdata->vif.type == NL80211_IFTYPE_AP ||
140 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
141 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
142 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
143 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
145 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
146 IEEE80211_STYPE_ACTION);
148 skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba));
150 mgmt->u.action.category = WLAN_CATEGORY_BACK;
151 mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA;
152 params = (u16)(initiator << 11); /* bit 11 initiator */
153 params |= (u16)(tid << 12); /* bit 15:12 TID number */
155 mgmt->u.action.u.delba.params = cpu_to_le16(params);
156 mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code);
158 ieee80211_tx_skb(sdata, skb);
161 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
162 struct sta_info *sta,
163 struct ieee80211_mgmt *mgmt, size_t len)
168 params = le16_to_cpu(mgmt->u.action.u.delba.params);
169 tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
170 initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11;
172 #ifdef CONFIG_MAC80211_HT_DEBUG
174 printk(KERN_DEBUG "delba from %pM (%s) tid %d reason code %d\n",
175 mgmt->sa, initiator ? "initiator" : "recipient", tid,
176 le16_to_cpu(mgmt->u.action.u.delba.reason_code));
177 #endif /* CONFIG_MAC80211_HT_DEBUG */
179 if (initiator == WLAN_BACK_INITIATOR)
180 __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_INITIATOR, 0);
182 __ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_RECIPIENT);
185 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
186 enum ieee80211_smps_mode smps, const u8 *da,
189 struct ieee80211_local *local = sdata->local;
191 struct ieee80211_mgmt *action_frame;
193 /* 27 = header + category + action + smps mode */
194 skb = dev_alloc_skb(27 + local->hw.extra_tx_headroom);
198 skb_reserve(skb, local->hw.extra_tx_headroom);
199 action_frame = (void *)skb_put(skb, 27);
200 memcpy(action_frame->da, da, ETH_ALEN);
201 memcpy(action_frame->sa, sdata->dev->dev_addr, ETH_ALEN);
202 memcpy(action_frame->bssid, bssid, ETH_ALEN);
203 action_frame->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
204 IEEE80211_STYPE_ACTION);
205 action_frame->u.action.category = WLAN_CATEGORY_HT;
206 action_frame->u.action.u.ht_smps.action = WLAN_HT_ACTION_SMPS;
208 case IEEE80211_SMPS_AUTOMATIC:
209 case IEEE80211_SMPS_NUM_MODES:
211 case IEEE80211_SMPS_OFF:
212 action_frame->u.action.u.ht_smps.smps_control =
213 WLAN_HT_SMPS_CONTROL_DISABLED;
215 case IEEE80211_SMPS_STATIC:
216 action_frame->u.action.u.ht_smps.smps_control =
217 WLAN_HT_SMPS_CONTROL_STATIC;
219 case IEEE80211_SMPS_DYNAMIC:
220 action_frame->u.action.u.ht_smps.smps_control =
221 WLAN_HT_SMPS_CONTROL_DYNAMIC;
225 /* we'll do more on status of this frame */
226 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
227 ieee80211_tx_skb(sdata, skb);