1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * EHT handling
4 *
5 * Copyright(c) 2021-2022 Intel Corporation
6 */
7
8 #include "ieee80211_i.h"
9
10 void
ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data * sdata,struct ieee80211_supported_band * sband,const u8 * he_cap_ie,u8 he_cap_len,const struct ieee80211_eht_cap_elem * eht_cap_ie_elem,u8 eht_cap_len,struct link_sta_info * link_sta)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(sband,
29 ieee80211_vif_type_p2p(&sdata->vif)))
30 return;
31
32 mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem,
33 &eht_cap_ie_elem->fixed,
34 sdata->vif.type ==
35 NL80211_IFTYPE_STATION);
36
37 eht_total_size += mcs_nss_size;
38
39 /* Calculate the PPE thresholds length only if the header is present */
40 if (eht_cap_ie_elem->fixed.phy_cap_info[5] &
41 IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) {
42 u16 eht_ppe_hdr;
43
44 if (eht_cap_len < eht_total_size + sizeof(u16))
45 return;
46
47 eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size);
48 eht_ppe_size =
49 ieee80211_eht_ppe_size(eht_ppe_hdr,
50 eht_cap_ie_elem->fixed.phy_cap_info);
51 eht_total_size += eht_ppe_size;
52
53 /* we calculate as if NSS > 8 are valid, but don't handle that */
54 if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres))
55 return;
56 }
57
58 if (eht_cap_len < eht_total_size)
59 return;
60
61 /* Copy the static portion of the EHT capabilities */
62 memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem));
63 pos += sizeof(eht_cap->eht_cap_elem);
64
65 /* Copy MCS/NSS which depends on the peer capabilities */
66 memset(&eht_cap->eht_mcs_nss_supp, 0,
67 sizeof(eht_cap->eht_mcs_nss_supp));
68 memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size);
69
70 if (eht_ppe_size)
71 memcpy(eht_cap->eht_ppe_thres,
72 &eht_cap_ie_elem->optional[mcs_nss_size],
73 eht_ppe_size);
74
75 eht_cap->has_eht = true;
76
77 link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
78 link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
79 }
80