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a1de6407 IP |
1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* | |
3 | * EHT handling | |
4 | * | |
1ec7291e | 5 | * Copyright(c) 2021-2023 Intel Corporation |
a1de6407 IP |
6 | */ |
7 | ||
8 | #include "ieee80211_i.h" | |
9 | ||
10 | void | |
11 | ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata, | |
12 | struct ieee80211_supported_band *sband, | |
13 | const u8 *he_cap_ie, u8 he_cap_len, | |
14 | const struct ieee80211_eht_cap_elem *eht_cap_ie_elem, | |
c71420db JB |
15 | u8 eht_cap_len, |
16 | struct link_sta_info *link_sta) | |
a1de6407 | 17 | { |
c71420db | 18 | struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; |
a1de6407 IP |
19 | struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie; |
20 | u8 eht_ppe_size = 0; | |
21 | u8 mcs_nss_size; | |
22 | u8 eht_total_size = sizeof(eht_cap->eht_cap_elem); | |
23 | u8 *pos = (u8 *)eht_cap_ie_elem; | |
24 | ||
25 | memset(eht_cap, 0, sizeof(*eht_cap)); | |
26 | ||
27 | if (!eht_cap_ie_elem || | |
1ec7291e | 28 | !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif)) |
a1de6407 IP |
29 | return; |
30 | ||
31 | mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem, | |
ea5cba26 JB |
32 | &eht_cap_ie_elem->fixed, |
33 | sdata->vif.type == | |
34 | NL80211_IFTYPE_STATION); | |
a1de6407 IP |
35 | |
36 | eht_total_size += mcs_nss_size; | |
37 | ||
38 | /* Calculate the PPE thresholds length only if the header is present */ | |
39 | if (eht_cap_ie_elem->fixed.phy_cap_info[5] & | |
40 | IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) { | |
41 | u16 eht_ppe_hdr; | |
42 | ||
43 | if (eht_cap_len < eht_total_size + sizeof(u16)) | |
44 | return; | |
45 | ||
46 | eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size); | |
47 | eht_ppe_size = | |
48 | ieee80211_eht_ppe_size(eht_ppe_hdr, | |
49 | eht_cap_ie_elem->fixed.phy_cap_info); | |
50 | eht_total_size += eht_ppe_size; | |
51 | ||
52 | /* we calculate as if NSS > 8 are valid, but don't handle that */ | |
53 | if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres)) | |
54 | return; | |
55 | } | |
56 | ||
57 | if (eht_cap_len < eht_total_size) | |
58 | return; | |
59 | ||
60 | /* Copy the static portion of the EHT capabilities */ | |
61 | memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem)); | |
62 | pos += sizeof(eht_cap->eht_cap_elem); | |
63 | ||
64 | /* Copy MCS/NSS which depends on the peer capabilities */ | |
65 | memset(&eht_cap->eht_mcs_nss_supp, 0, | |
66 | sizeof(eht_cap->eht_mcs_nss_supp)); | |
67 | memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size); | |
68 | ||
69 | if (eht_ppe_size) | |
70 | memcpy(eht_cap->eht_ppe_thres, | |
71 | &eht_cap_ie_elem->optional[mcs_nss_size], | |
72 | eht_ppe_size); | |
73 | ||
74 | eht_cap->has_eht = true; | |
75 | ||
c71420db JB |
76 | link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta); |
77 | link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta); | |
a1de6407 | 78 | } |