Root/
1 | /* |
2 | * HT handling |
3 | * |
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 |
10 | * |
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> |
17 | #include <net/mac80211.h> |
18 | #include "ieee80211_i.h" |
19 | #include "rate.h" |
20 | |
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) |
24 | { |
25 | u8 ampdu_info, tx_mcs_set_cap; |
26 | int i, max_tx_streams; |
27 | |
28 | BUG_ON(!ht_cap); |
29 | |
30 | memset(ht_cap, 0, sizeof(*ht_cap)); |
31 | |
32 | if (!ht_cap_ie) |
33 | return; |
34 | |
35 | ht_cap->ht_supported = true; |
36 | |
37 | ht_cap->cap = le16_to_cpu(ht_cap_ie->cap_info) & sband->ht_cap.cap; |
38 | ht_cap->cap &= ~IEEE80211_HT_CAP_SM_PS; |
39 | ht_cap->cap |= sband->ht_cap.cap & IEEE80211_HT_CAP_SM_PS; |
40 | |
41 | ampdu_info = ht_cap_ie->ampdu_params_info; |
42 | ht_cap->ampdu_factor = |
43 | ampdu_info & IEEE80211_HT_AMPDU_PARM_FACTOR; |
44 | ht_cap->ampdu_density = |
45 | (ampdu_info & IEEE80211_HT_AMPDU_PARM_DENSITY) >> 2; |
46 | |
47 | /* own MCS TX capabilities */ |
48 | tx_mcs_set_cap = sband->ht_cap.mcs.tx_params; |
49 | |
50 | /* can we TX with MCS rates? */ |
51 | if (!(tx_mcs_set_cap & IEEE80211_HT_MCS_TX_DEFINED)) |
52 | return; |
53 | |
54 | /* Counting from 0, therefore +1 */ |
55 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_RX_DIFF) |
56 | max_tx_streams = |
57 | ((tx_mcs_set_cap & IEEE80211_HT_MCS_TX_MAX_STREAMS_MASK) |
58 | >> IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT) + 1; |
59 | else |
60 | max_tx_streams = IEEE80211_HT_MCS_TX_MAX_STREAMS; |
61 | |
62 | /* |
63 | * 802.11n D5.0 20.3.5 / 20.6 says: |
64 | * - indices 0 to 7 and 32 are single spatial stream |
65 | * - 8 to 31 are multiple spatial streams using equal modulation |
66 | * [8..15 for two streams, 16..23 for three and 24..31 for four] |
67 | * - remainder are multiple spatial streams using unequal modulation |
68 | */ |
69 | for (i = 0; i < max_tx_streams; i++) |
70 | ht_cap->mcs.rx_mask[i] = |
71 | sband->ht_cap.mcs.rx_mask[i] & ht_cap_ie->mcs.rx_mask[i]; |
72 | |
73 | if (tx_mcs_set_cap & IEEE80211_HT_MCS_TX_UNEQUAL_MODULATION) |
74 | for (i = IEEE80211_HT_MCS_UNEQUAL_MODULATION_START_BYTE; |
75 | i < IEEE80211_HT_MCS_MASK_LEN; i++) |
76 | ht_cap->mcs.rx_mask[i] = |
77 | sband->ht_cap.mcs.rx_mask[i] & |
78 | ht_cap_ie->mcs.rx_mask[i]; |
79 | |
80 | /* handle MCS rate 32 too */ |
81 | if (sband->ht_cap.mcs.rx_mask[32/8] & ht_cap_ie->mcs.rx_mask[32/8] & 1) |
82 | ht_cap->mcs.rx_mask[32/8] |= 1; |
83 | } |
84 | |
85 | void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta) |
86 | { |
87 | int i; |
88 | |
89 | for (i = 0; i < STA_TID_NUM; i++) { |
90 | __ieee80211_stop_tx_ba_session(sta, i, WLAN_BACK_INITIATOR); |
91 | __ieee80211_stop_rx_ba_session(sta, i, WLAN_BACK_RECIPIENT, |
92 | WLAN_REASON_QSTA_LEAVE_QBSS); |
93 | } |
94 | } |
95 | |
96 | void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata, |
97 | const u8 *da, u16 tid, |
98 | u16 initiator, u16 reason_code) |
99 | { |
100 | struct ieee80211_local *local = sdata->local; |
101 | struct sk_buff *skb; |
102 | struct ieee80211_mgmt *mgmt; |
103 | u16 params; |
104 | |
105 | skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom); |
106 | |
107 | if (!skb) { |
108 | printk(KERN_ERR "%s: failed to allocate buffer " |
109 | "for delba frame\n", sdata->dev->name); |
110 | return; |
111 | } |
112 | |
113 | skb_reserve(skb, local->hw.extra_tx_headroom); |
114 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24); |
115 | memset(mgmt, 0, 24); |
116 | memcpy(mgmt->da, da, ETH_ALEN); |
117 | memcpy(mgmt->sa, sdata->dev->dev_addr, ETH_ALEN); |
118 | if (sdata->vif.type == NL80211_IFTYPE_AP || |
119 | sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
120 | memcpy(mgmt->bssid, sdata->dev->dev_addr, ETH_ALEN); |
121 | else if (sdata->vif.type == NL80211_IFTYPE_STATION) |
122 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
123 | |
124 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
125 | IEEE80211_STYPE_ACTION); |
126 | |
127 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.delba)); |
128 | |
129 | mgmt->u.action.category = WLAN_CATEGORY_BACK; |
130 | mgmt->u.action.u.delba.action_code = WLAN_ACTION_DELBA; |
131 | params = (u16)(initiator << 11); /* bit 11 initiator */ |
132 | params |= (u16)(tid << 12); /* bit 15:12 TID number */ |
133 | |
134 | mgmt->u.action.u.delba.params = cpu_to_le16(params); |
135 | mgmt->u.action.u.delba.reason_code = cpu_to_le16(reason_code); |
136 | |
137 | ieee80211_tx_skb(sdata, skb, 1); |
138 | } |
139 | |
140 | void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata, |
141 | struct sta_info *sta, |
142 | struct ieee80211_mgmt *mgmt, size_t len) |
143 | { |
144 | u16 tid, params; |
145 | u16 initiator; |
146 | |
147 | params = le16_to_cpu(mgmt->u.action.u.delba.params); |
148 | tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12; |
149 | initiator = (params & IEEE80211_DELBA_PARAM_INITIATOR_MASK) >> 11; |
150 | |
151 | #ifdef CONFIG_MAC80211_HT_DEBUG |
152 | if (net_ratelimit()) |
153 | printk(KERN_DEBUG "delba from %pM (%s) tid %d reason code %d\n", |
154 | mgmt->sa, initiator ? "initiator" : "recipient", tid, |
155 | le16_to_cpu(mgmt->u.action.u.delba.reason_code)); |
156 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
157 | |
158 | if (initiator == WLAN_BACK_INITIATOR) |
159 | ieee80211_sta_stop_rx_ba_session(sdata, sta->sta.addr, tid, |
160 | WLAN_BACK_INITIATOR, 0); |
161 | else { /* WLAN_BACK_RECIPIENT */ |
162 | spin_lock_bh(&sta->lock); |
163 | if (sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK) |
164 | ___ieee80211_stop_tx_ba_session(sta, tid, |
165 | WLAN_BACK_RECIPIENT); |
166 | spin_unlock_bh(&sta->lock); |
167 | } |
168 | } |
169 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9