1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * EHT handling 4 * 5 * Copyright(c) 2021-2026 Intel Corporation 6 */ 7 8 #include "driver-ops.h" 9 #include "ieee80211_i.h" 10 11 void 12 ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata, 13 struct ieee80211_supported_band *sband, 14 const u8 *he_cap_ie, u8 he_cap_len, 15 const struct ieee80211_eht_cap_elem *eht_cap_ie_elem, 16 u8 eht_cap_len, 17 struct link_sta_info *link_sta) 18 { 19 struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap; 20 struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie; 21 u8 eht_ppe_size = 0; 22 u8 mcs_nss_size; 23 u8 eht_total_size = sizeof(eht_cap->eht_cap_elem); 24 u8 *pos = (u8 *)eht_cap_ie_elem; 25 26 memset(eht_cap, 0, sizeof(*eht_cap)); 27 28 if (!eht_cap_ie_elem || 29 !ieee80211_get_eht_iftype_cap_vif(sband, &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 /* 78 * The MPDU length bits are reserved on all but 2.4 GHz and get set via 79 * VHT (5 GHz) or HE (6 GHz) capabilities. 80 */ 81 if (sband->band != NL80211_BAND_2GHZ) 82 return; 83 84 switch (u8_get_bits(eht_cap->eht_cap_elem.mac_cap_info[0], 85 IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_MASK)) { 86 case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_11454: 87 link_sta->pub->agg.max_amsdu_len = 88 IEEE80211_MAX_MPDU_LEN_VHT_11454; 89 break; 90 case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_7991: 91 link_sta->pub->agg.max_amsdu_len = 92 IEEE80211_MAX_MPDU_LEN_VHT_7991; 93 break; 94 case IEEE80211_EHT_MAC_CAP0_MAX_MPDU_LEN_3895: 95 default: 96 link_sta->pub->agg.max_amsdu_len = 97 IEEE80211_MAX_MPDU_LEN_VHT_3895; 98 break; 99 } 100 101 ieee80211_sta_recalc_aggregates(&link_sta->sta->sta); 102 } 103