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, &sdata->vif)) 29 return; 30 31 mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem, 32 &eht_cap_ie_elem->fixed, 33 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(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 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