1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * EHT handling |
4 | * |
5 | * Copyright(c) 2021-2023 Intel Corporation |
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, |
15 | u8 eht_cap_len, |
16 | struct link_sta_info *link_sta) |
17 | { |
18 | struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; |
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 || |
28 | !ieee80211_get_eht_iftype_cap_vif(sband, vif: &sdata->vif)) |
29 | return; |
30 | |
31 | mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap: he_cap_ie_elem, |
32 | eht_cap: &eht_cap_ie_elem->fixed, |
33 | from_ap: sdata->vif.type == |
34 | NL80211_IFTYPE_STATION); |
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(p: eht_cap_ie_elem->optional + mcs_nss_size); |
47 | eht_ppe_size = |
48 | ieee80211_eht_ppe_size(ppe_thres_hdr: eht_ppe_hdr, |
49 | phy_cap_info: 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 | |
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); |
78 | } |
79 | |