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 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