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// SPDX-License-Identifier: GPL-2.0-only
/*
* EHT handling
*
* Copyright(c) 2021-2022 Intel Corporation
*/
#include "ieee80211_i.h"
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)
{
struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
u8 eht_ppe_size = 0;
u8 mcs_nss_size;
u8 eht_total_size = sizeof(eht_cap->eht_cap_elem);
u8 *pos = (u8 *)eht_cap_ie_elem;
memset(eht_cap, 0, sizeof(*eht_cap));
if (!eht_cap_ie_elem ||
!ieee80211_get_eht_iftype_cap(sband,
ieee80211_vif_type_p2p(&sdata->vif)))
return;
mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem,
&eht_cap_ie_elem->fixed);
eht_total_size += mcs_nss_size;
/* Calculate the PPE thresholds length only if the header is present */
if (eht_cap_ie_elem->fixed.phy_cap_info[5] &
IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) {
u16 eht_ppe_hdr;
if (eht_cap_len < eht_total_size + sizeof(u16))
return;
eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size);
eht_ppe_size =
ieee80211_eht_ppe_size(eht_ppe_hdr,
eht_cap_ie_elem->fixed.phy_cap_info);
eht_total_size += eht_ppe_size;
/* we calculate as if NSS > 8 are valid, but don't handle that */
if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres))
return;
}
if (eht_cap_len < eht_total_size)
return;
/* Copy the static portion of the EHT capabilities */
memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem));
pos += sizeof(eht_cap->eht_cap_elem);
/* Copy MCS/NSS which depends on the peer capabilities */
memset(&eht_cap->eht_mcs_nss_supp, 0,
sizeof(eht_cap->eht_mcs_nss_supp));
memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size);
if (eht_ppe_size)
memcpy(eht_cap->eht_ppe_thres,
&eht_cap_ie_elem->optional[mcs_nss_size],
eht_ppe_size);
eht_cap->has_eht = true;
link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
}
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