Commit | Line | Data |
---|---|---|
818255ea MP |
1 | /* |
2 | * VHT handling | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/ieee80211.h> | |
10 | #include <linux/export.h> | |
11 | #include <net/mac80211.h> | |
12 | #include "ieee80211_i.h" | |
13 | ||
14 | ||
15 | void ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, | |
16 | struct ieee80211_supported_band *sband, | |
17 | struct ieee80211_vht_cap *vht_cap_ie, | |
4a34215e | 18 | struct sta_info *sta) |
818255ea | 19 | { |
4a34215e | 20 | struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
818255ea MP |
21 | |
22 | memset(vht_cap, 0, sizeof(*vht_cap)); | |
23 | ||
4a34215e JB |
24 | if (!sta->sta.ht_cap.ht_supported) |
25 | return; | |
26 | ||
818255ea MP |
27 | if (!vht_cap_ie || !sband->vht_cap.vht_supported) |
28 | return; | |
29 | ||
e1a0c6b3 JB |
30 | /* A VHT STA must support 40 MHz */ |
31 | if (!(sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
32 | return; | |
33 | ||
818255ea MP |
34 | vht_cap->vht_supported = true; |
35 | ||
36 | vht_cap->cap = le32_to_cpu(vht_cap_ie->vht_cap_info); | |
37 | ||
38 | /* Copy peer MCS info, the driver might need them. */ | |
39 | memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs, | |
40 | sizeof(struct ieee80211_vht_mcs_info)); | |
e1a0c6b3 JB |
41 | |
42 | sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta); | |
43 | } | |
44 | ||
45 | enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) | |
46 | { | |
47 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
48 | u32 cap = sta->sta.vht_cap.cap; | |
49 | ||
50 | if (!sta->sta.vht_cap.vht_supported) | |
51 | return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
52 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
53 | ||
54 | /* TODO: handle VHT opmode notification data */ | |
55 | ||
56 | switch (sdata->vif.bss_conf.chandef.width) { | |
57 | default: | |
58 | WARN_ON_ONCE(1); | |
59 | /* fall through */ | |
60 | case NL80211_CHAN_WIDTH_20_NOHT: | |
61 | case NL80211_CHAN_WIDTH_20: | |
62 | case NL80211_CHAN_WIDTH_40: | |
63 | return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? | |
64 | IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20; | |
65 | case NL80211_CHAN_WIDTH_160: | |
66 | if (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) | |
67 | return IEEE80211_STA_RX_BW_160; | |
68 | /* fall through */ | |
69 | case NL80211_CHAN_WIDTH_80P80: | |
70 | if (cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) | |
71 | return IEEE80211_STA_RX_BW_160; | |
72 | /* fall through */ | |
73 | case NL80211_CHAN_WIDTH_80: | |
74 | return IEEE80211_STA_RX_BW_80; | |
75 | } | |
818255ea | 76 | } |