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697 lines
21 KiB
697 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* VHT handling |
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* |
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* Portions of this file |
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* Copyright(c) 2015 - 2016 Intel Deutschland GmbH |
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* Copyright (C) 2018 - 2020 Intel Corporation |
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*/ |
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|
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#include <linux/ieee80211.h> |
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#include <linux/export.h> |
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#include <net/mac80211.h> |
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#include "ieee80211_i.h" |
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#include "rate.h" |
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static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata, |
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struct ieee80211_sta_vht_cap *vht_cap, |
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u32 flag) |
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{ |
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__le32 le_flag = cpu_to_le32(flag); |
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if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag && |
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!(sdata->u.mgd.vht_capa.vht_cap_info & le_flag)) |
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vht_cap->cap &= ~flag; |
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} |
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|
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void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata, |
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struct ieee80211_sta_vht_cap *vht_cap) |
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{ |
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int i; |
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u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n; |
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if (!vht_cap->vht_supported) |
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return; |
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if (sdata->vif.type != NL80211_IFTYPE_STATION) |
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return; |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_RXLDPC); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_SHORT_GI_80); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_SHORT_GI_160); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_TXSTBC); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN); |
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__check_vhtcap_disable(sdata, vht_cap, |
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IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN); |
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|
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/* Allow user to decrease AMPDU length exponent */ |
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if (sdata->u.mgd.vht_capa_mask.vht_cap_info & |
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cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) { |
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u32 cap, n; |
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n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) & |
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IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; |
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n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; |
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cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; |
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cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; |
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if (n < cap) { |
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vht_cap->cap &= |
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~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK; |
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vht_cap->cap |= |
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n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT; |
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} |
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} |
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/* Allow the user to decrease MCSes */ |
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rxmcs_mask = |
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le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map); |
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rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map); |
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rxmcs_n &= rxmcs_mask; |
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rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); |
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txmcs_mask = |
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le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map); |
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txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map); |
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txmcs_n &= txmcs_mask; |
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txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); |
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for (i = 0; i < 8; i++) { |
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u8 m, n, c; |
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m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) || |
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n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) { |
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rxmcs_cap &= ~(3 << 2*i); |
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rxmcs_cap |= (rxmcs_n & (3 << 2*i)); |
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} |
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m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) || |
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n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) { |
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txmcs_cap &= ~(3 << 2*i); |
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txmcs_cap |= (txmcs_n & (3 << 2*i)); |
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} |
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} |
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vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap); |
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vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap); |
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} |
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void |
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ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata, |
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struct ieee80211_supported_band *sband, |
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const struct ieee80211_vht_cap *vht_cap_ie, |
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struct sta_info *sta) |
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{ |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
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struct ieee80211_sta_vht_cap own_cap; |
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u32 cap_info, i; |
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bool have_80mhz; |
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memset(vht_cap, 0, sizeof(*vht_cap)); |
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if (!sta->sta.ht_cap.ht_supported) |
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return; |
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if (!vht_cap_ie || !sband->vht_cap.vht_supported) |
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return; |
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/* Allow VHT if at least one channel on the sband supports 80 MHz */ |
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have_80mhz = false; |
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for (i = 0; i < sband->n_channels; i++) { |
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if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | |
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IEEE80211_CHAN_NO_80MHZ)) |
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continue; |
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have_80mhz = true; |
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break; |
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} |
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if (!have_80mhz) |
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return; |
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/* |
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* A VHT STA must support 40 MHz, but if we verify that here |
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* then we break a few things - some APs (e.g. Netgear R6300v2 |
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* and others based on the BCM4360 chipset) will unset this |
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* capability bit when operating in 20 MHz. |
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*/ |
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vht_cap->vht_supported = true; |
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own_cap = sband->vht_cap; |
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/* |
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* If user has specified capability overrides, take care |
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* of that if the station we're setting up is the AP that |
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* we advertised a restricted capability set to. Override |
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* our own capabilities and then use those below. |
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*/ |
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if (sdata->vif.type == NL80211_IFTYPE_STATION && |
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!test_sta_flag(sta, WLAN_STA_TDLS_PEER)) |
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ieee80211_apply_vhtcap_overrides(sdata, &own_cap); |
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/* take some capabilities as-is */ |
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cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info); |
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vht_cap->cap = cap_info; |
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vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC | |
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IEEE80211_VHT_CAP_VHT_TXOP_PS | |
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IEEE80211_VHT_CAP_HTC_VHT | |
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IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK | |
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IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB | |
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IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB | |
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IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | |
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IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN; |
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vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK, |
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own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK); |
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/* and some based on our own capabilities */ |
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switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { |
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: |
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vht_cap->cap |= cap_info & |
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IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ; |
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break; |
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: |
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vht_cap->cap |= cap_info & |
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IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
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break; |
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default: |
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/* nothing */ |
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break; |
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} |
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/* symmetric capabilities */ |
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vht_cap->cap |= cap_info & own_cap.cap & |
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(IEEE80211_VHT_CAP_SHORT_GI_80 | |
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IEEE80211_VHT_CAP_SHORT_GI_160); |
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/* remaining ones */ |
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if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE) |
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vht_cap->cap |= cap_info & |
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(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | |
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IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK); |
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if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE) |
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vht_cap->cap |= cap_info & |
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(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | |
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IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK); |
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if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE) |
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vht_cap->cap |= cap_info & |
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IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; |
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if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) |
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vht_cap->cap |= cap_info & |
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IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE; |
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if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC) |
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vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK; |
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if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK) |
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vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC; |
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/* Copy peer MCS info, the driver might need them. */ |
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memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs, |
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sizeof(struct ieee80211_vht_mcs_info)); |
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/* copy EXT_NSS_BW Support value or remove the capability */ |
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if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW)) |
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vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK); |
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else |
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vht_cap->vht_mcs.tx_highest &= |
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~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); |
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/* but also restrict MCSes */ |
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for (i = 0; i < 8; i++) { |
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u16 own_rx, own_tx, peer_rx, peer_tx; |
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own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map); |
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own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map); |
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own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map); |
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peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map); |
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peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
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if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED) |
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peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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else if (own_rx < peer_tx) |
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peer_tx = own_rx; |
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} |
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if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
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if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED) |
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peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED; |
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else if (own_tx < peer_rx) |
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peer_rx = own_tx; |
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} |
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vht_cap->vht_mcs.rx_mcs_map &= |
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~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); |
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vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2); |
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vht_cap->vht_mcs.tx_mcs_map &= |
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~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2); |
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vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2); |
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} |
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/* |
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* This is a workaround for VHT-enabled STAs which break the spec |
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* and have the VHT-MCS Rx map filled in with value 3 for all eight |
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* spacial streams, an example is AR9462. |
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* |
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* As per spec, in section 22.1.1 Introduction to the VHT PHY |
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* A VHT STA shall support at least single spactial stream VHT-MCSs |
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* 0 to 7 (transmit and receive) in all supported channel widths. |
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*/ |
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if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) { |
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vht_cap->vht_supported = false; |
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sdata_info(sdata, "Ignoring VHT IE from %pM due to invalid rx_mcs_map\n", |
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sta->addr); |
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return; |
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} |
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/* finally set up the bandwidth */ |
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switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) { |
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ: |
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case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ: |
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sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; |
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break; |
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default: |
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sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; |
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if (!(vht_cap->vht_mcs.tx_highest & |
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cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE))) |
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break; |
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/* |
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* If this is non-zero, then it does support 160 MHz after all, |
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* in one form or the other. We don't distinguish here (or even |
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* above) between 160 and 80+80 yet. |
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*/ |
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if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) |
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sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; |
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} |
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sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta); |
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switch (vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK) { |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454: |
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sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454; |
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break; |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991: |
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sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991; |
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break; |
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case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895: |
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default: |
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sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895; |
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break; |
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} |
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} |
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/* FIXME: move this to some better location - parses HE now */ |
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enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta) |
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{ |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
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struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; |
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u32 cap_width; |
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if (he_cap->has_he) { |
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u8 info = he_cap->he_cap_elem.phy_cap_info[0]; |
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if (sta->sdata->vif.bss_conf.chandef.chan->band == |
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NL80211_BAND_2GHZ) { |
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if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) |
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return IEEE80211_STA_RX_BW_40; |
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else |
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return IEEE80211_STA_RX_BW_20; |
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} |
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if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G || |
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info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G) |
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return IEEE80211_STA_RX_BW_160; |
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else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G) |
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return IEEE80211_STA_RX_BW_80; |
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return IEEE80211_STA_RX_BW_20; |
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} |
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if (!vht_cap->vht_supported) |
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return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? |
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IEEE80211_STA_RX_BW_40 : |
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IEEE80211_STA_RX_BW_20; |
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cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
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if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ || |
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cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) |
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return IEEE80211_STA_RX_BW_160; |
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|
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/* |
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* If this is non-zero, then it does support 160 MHz after all, |
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* in one form or the other. We don't distinguish here (or even |
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* above) between 160 and 80+80 yet. |
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*/ |
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if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) |
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return IEEE80211_STA_RX_BW_160; |
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|
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return IEEE80211_STA_RX_BW_80; |
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} |
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|
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enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta) |
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{ |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
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u32 cap_width; |
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|
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if (!vht_cap->vht_supported) { |
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if (!sta->sta.ht_cap.ht_supported) |
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return NL80211_CHAN_WIDTH_20_NOHT; |
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|
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return sta->sta.ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? |
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NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20; |
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} |
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cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
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if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) |
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return NL80211_CHAN_WIDTH_160; |
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else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) |
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return NL80211_CHAN_WIDTH_80P80; |
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|
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return NL80211_CHAN_WIDTH_80; |
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} |
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|
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enum nl80211_chan_width |
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ieee80211_sta_rx_bw_to_chan_width(struct sta_info *sta) |
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{ |
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enum ieee80211_sta_rx_bandwidth cur_bw = sta->sta.bandwidth; |
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struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap; |
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u32 cap_width; |
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|
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switch (cur_bw) { |
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case IEEE80211_STA_RX_BW_20: |
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if (!sta->sta.ht_cap.ht_supported) |
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return NL80211_CHAN_WIDTH_20_NOHT; |
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else |
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return NL80211_CHAN_WIDTH_20; |
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case IEEE80211_STA_RX_BW_40: |
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return NL80211_CHAN_WIDTH_40; |
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case IEEE80211_STA_RX_BW_80: |
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return NL80211_CHAN_WIDTH_80; |
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case IEEE80211_STA_RX_BW_160: |
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cap_width = |
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vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; |
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|
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if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ) |
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return NL80211_CHAN_WIDTH_160; |
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|
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return NL80211_CHAN_WIDTH_80P80; |
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default: |
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return NL80211_CHAN_WIDTH_20; |
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} |
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} |
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|
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enum ieee80211_sta_rx_bandwidth |
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ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width) |
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{ |
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switch (width) { |
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case NL80211_CHAN_WIDTH_20_NOHT: |
|
case NL80211_CHAN_WIDTH_20: |
|
return IEEE80211_STA_RX_BW_20; |
|
case NL80211_CHAN_WIDTH_40: |
|
return IEEE80211_STA_RX_BW_40; |
|
case NL80211_CHAN_WIDTH_80: |
|
return IEEE80211_STA_RX_BW_80; |
|
case NL80211_CHAN_WIDTH_160: |
|
case NL80211_CHAN_WIDTH_80P80: |
|
return IEEE80211_STA_RX_BW_160; |
|
default: |
|
WARN_ON_ONCE(1); |
|
return IEEE80211_STA_RX_BW_20; |
|
} |
|
} |
|
|
|
/* FIXME: rename/move - this deals with everything not just VHT */ |
|
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = sta->sdata; |
|
enum ieee80211_sta_rx_bandwidth bw; |
|
enum nl80211_chan_width bss_width = sdata->vif.bss_conf.chandef.width; |
|
|
|
bw = ieee80211_sta_cap_rx_bw(sta); |
|
bw = min(bw, sta->cur_max_bandwidth); |
|
|
|
/* Don't consider AP's bandwidth for TDLS peers, section 11.23.1 of |
|
* IEEE80211-2016 specification makes higher bandwidth operation |
|
* possible on the TDLS link if the peers have wider bandwidth |
|
* capability. |
|
* |
|
* However, in this case, and only if the TDLS peer is authorized, |
|
* limit to the tdls_chandef so that the configuration here isn't |
|
* wider than what's actually requested on the channel context. |
|
*/ |
|
if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && |
|
test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) && |
|
test_sta_flag(sta, WLAN_STA_AUTHORIZED) && |
|
sta->tdls_chandef.chan) |
|
bw = min(bw, ieee80211_chan_width_to_rx_bw(sta->tdls_chandef.width)); |
|
else |
|
bw = min(bw, ieee80211_chan_width_to_rx_bw(bss_width)); |
|
|
|
return bw; |
|
} |
|
|
|
void ieee80211_sta_set_rx_nss(struct sta_info *sta) |
|
{ |
|
u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, rx_nss; |
|
bool support_160; |
|
|
|
/* if we received a notification already don't overwrite it */ |
|
if (sta->sta.rx_nss) |
|
return; |
|
|
|
if (sta->sta.he_cap.has_he) { |
|
int i; |
|
u8 rx_mcs_80 = 0, rx_mcs_160 = 0; |
|
const struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap; |
|
u16 mcs_160_map = |
|
le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_160); |
|
u16 mcs_80_map = le16_to_cpu(he_cap->he_mcs_nss_supp.rx_mcs_80); |
|
|
|
for (i = 7; i >= 0; i--) { |
|
u8 mcs_160 = (mcs_160_map >> (2 * i)) & 3; |
|
|
|
if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
|
rx_mcs_160 = i + 1; |
|
break; |
|
} |
|
} |
|
for (i = 7; i >= 0; i--) { |
|
u8 mcs_80 = (mcs_80_map >> (2 * i)) & 3; |
|
|
|
if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
|
rx_mcs_80 = i + 1; |
|
break; |
|
} |
|
} |
|
|
|
support_160 = he_cap->he_cap_elem.phy_cap_info[0] & |
|
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; |
|
|
|
if (support_160) |
|
he_rx_nss = min(rx_mcs_80, rx_mcs_160); |
|
else |
|
he_rx_nss = rx_mcs_80; |
|
} |
|
|
|
if (sta->sta.ht_cap.ht_supported) { |
|
if (sta->sta.ht_cap.mcs.rx_mask[0]) |
|
ht_rx_nss++; |
|
if (sta->sta.ht_cap.mcs.rx_mask[1]) |
|
ht_rx_nss++; |
|
if (sta->sta.ht_cap.mcs.rx_mask[2]) |
|
ht_rx_nss++; |
|
if (sta->sta.ht_cap.mcs.rx_mask[3]) |
|
ht_rx_nss++; |
|
/* FIXME: consider rx_highest? */ |
|
} |
|
|
|
if (sta->sta.vht_cap.vht_supported) { |
|
int i; |
|
u16 rx_mcs_map; |
|
|
|
rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map); |
|
|
|
for (i = 7; i >= 0; i--) { |
|
u8 mcs = (rx_mcs_map >> (2 * i)) & 3; |
|
|
|
if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) { |
|
vht_rx_nss = i + 1; |
|
break; |
|
} |
|
} |
|
/* FIXME: consider rx_highest? */ |
|
} |
|
|
|
rx_nss = max(vht_rx_nss, ht_rx_nss); |
|
rx_nss = max(he_rx_nss, rx_nss); |
|
sta->sta.rx_nss = max_t(u8, 1, rx_nss); |
|
} |
|
|
|
u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, |
|
struct sta_info *sta, u8 opmode, |
|
enum nl80211_band band) |
|
{ |
|
enum ieee80211_sta_rx_bandwidth new_bw; |
|
struct sta_opmode_info sta_opmode = {}; |
|
u32 changed = 0; |
|
u8 nss; |
|
|
|
/* ignore - no support for BF yet */ |
|
if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF) |
|
return 0; |
|
|
|
nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; |
|
nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; |
|
nss += 1; |
|
|
|
if (sta->sta.rx_nss != nss) { |
|
sta->sta.rx_nss = nss; |
|
sta_opmode.rx_nss = nss; |
|
changed |= IEEE80211_RC_NSS_CHANGED; |
|
sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED; |
|
} |
|
|
|
switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) { |
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ: |
|
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ |
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20; |
|
break; |
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ: |
|
/* ignore IEEE80211_OPMODE_NOTIF_BW_160_80P80 must not be set */ |
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40; |
|
break; |
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ: |
|
if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80) |
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; |
|
else |
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80; |
|
break; |
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ: |
|
/* legacy only, no longer used by newer spec */ |
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160; |
|
break; |
|
} |
|
|
|
new_bw = ieee80211_sta_cur_vht_bw(sta); |
|
if (new_bw != sta->sta.bandwidth) { |
|
sta->sta.bandwidth = new_bw; |
|
sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(sta); |
|
changed |= IEEE80211_RC_BW_CHANGED; |
|
sta_opmode.changed |= STA_OPMODE_MAX_BW_CHANGED; |
|
} |
|
|
|
if (sta_opmode.changed) |
|
cfg80211_sta_opmode_change_notify(sdata->dev, sta->addr, |
|
&sta_opmode, GFP_KERNEL); |
|
|
|
return changed; |
|
} |
|
|
|
void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata, |
|
struct ieee80211_mgmt *mgmt) |
|
{ |
|
struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; |
|
|
|
if (!sdata->vif.mu_mimo_owner) |
|
return; |
|
|
|
if (!memcmp(mgmt->u.action.u.vht_group_notif.position, |
|
bss_conf->mu_group.position, WLAN_USER_POSITION_LEN) && |
|
!memcmp(mgmt->u.action.u.vht_group_notif.membership, |
|
bss_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN)) |
|
return; |
|
|
|
memcpy(bss_conf->mu_group.membership, |
|
mgmt->u.action.u.vht_group_notif.membership, |
|
WLAN_MEMBERSHIP_LEN); |
|
memcpy(bss_conf->mu_group.position, |
|
mgmt->u.action.u.vht_group_notif.position, |
|
WLAN_USER_POSITION_LEN); |
|
|
|
ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_MU_GROUPS); |
|
} |
|
|
|
void ieee80211_update_mu_groups(struct ieee80211_vif *vif, |
|
const u8 *membership, const u8 *position) |
|
{ |
|
struct ieee80211_bss_conf *bss_conf = &vif->bss_conf; |
|
|
|
if (WARN_ON_ONCE(!vif->mu_mimo_owner)) |
|
return; |
|
|
|
memcpy(bss_conf->mu_group.membership, membership, WLAN_MEMBERSHIP_LEN); |
|
memcpy(bss_conf->mu_group.position, position, WLAN_USER_POSITION_LEN); |
|
} |
|
EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups); |
|
|
|
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata, |
|
struct sta_info *sta, u8 opmode, |
|
enum nl80211_band band) |
|
{ |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
|
|
|
u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode, band); |
|
|
|
if (changed > 0) { |
|
ieee80211_recalc_min_chandef(sdata); |
|
rate_control_rate_update(local, sband, sta, changed); |
|
} |
|
} |
|
|
|
void ieee80211_get_vht_mask_from_cap(__le16 vht_cap, |
|
u16 vht_mask[NL80211_VHT_NSS_MAX]) |
|
{ |
|
int i; |
|
u16 mask, cap = le16_to_cpu(vht_cap); |
|
|
|
for (i = 0; i < NL80211_VHT_NSS_MAX; i++) { |
|
mask = (cap >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED; |
|
switch (mask) { |
|
case IEEE80211_VHT_MCS_SUPPORT_0_7: |
|
vht_mask[i] = 0x00FF; |
|
break; |
|
case IEEE80211_VHT_MCS_SUPPORT_0_8: |
|
vht_mask[i] = 0x01FF; |
|
break; |
|
case IEEE80211_VHT_MCS_SUPPORT_0_9: |
|
vht_mask[i] = 0x03FF; |
|
break; |
|
case IEEE80211_VHT_MCS_NOT_SUPPORTED: |
|
default: |
|
vht_mask[i] = 0; |
|
break; |
|
} |
|
} |
|
}
|
|
|