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- // SPDX-License-Identifier: GPL-2.0-only
- /*
- * VHT handling
- *
- * Portions of this file
- * Copyright(c) 2015 - 2016 Intel Deutschland GmbH
- * Copyright (C) 2018 - 2023 Intel Corporation
- */
- #include <linux/ieee80211.h>
- #include <linux/export.h>
- #include <net/mac80211.h>
- #include "ieee80211_i.h"
- #include "rate.h"
- static void __check_vhtcap_disable(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_sta_vht_cap *vht_cap,
- u32 flag)
- {
- __le32 le_flag = cpu_to_le32(flag);
- if (sdata->u.mgd.vht_capa_mask.vht_cap_info & le_flag &&
- !(sdata->u.mgd.vht_capa.vht_cap_info & le_flag))
- vht_cap->cap &= ~flag;
- }
- void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_sta_vht_cap *vht_cap)
- {
- int i;
- u16 rxmcs_mask, rxmcs_cap, rxmcs_n, txmcs_mask, txmcs_cap, txmcs_n;
- if (!vht_cap->vht_supported)
- return;
- if (sdata->vif.type != NL80211_IFTYPE_STATION)
- return;
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_RXLDPC);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_SHORT_GI_80);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_SHORT_GI_160);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_TXSTBC);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN);
- __check_vhtcap_disable(sdata, vht_cap,
- IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN);
- /* Allow user to decrease AMPDU length exponent */
- if (sdata->u.mgd.vht_capa_mask.vht_cap_info &
- cpu_to_le32(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK)) {
- u32 cap, n;
- n = le32_to_cpu(sdata->u.mgd.vht_capa.vht_cap_info) &
- IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
- n >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
- cap = vht_cap->cap & IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
- cap >>= IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
- if (n < cap) {
- vht_cap->cap &=
- ~IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK;
- vht_cap->cap |=
- n << IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
- }
- }
- /* Allow the user to decrease MCSes */
- rxmcs_mask =
- le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.rx_mcs_map);
- rxmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.rx_mcs_map);
- rxmcs_n &= rxmcs_mask;
- rxmcs_cap = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
- txmcs_mask =
- le16_to_cpu(sdata->u.mgd.vht_capa_mask.supp_mcs.tx_mcs_map);
- txmcs_n = le16_to_cpu(sdata->u.mgd.vht_capa.supp_mcs.tx_mcs_map);
- txmcs_n &= txmcs_mask;
- txmcs_cap = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
- for (i = 0; i < 8; i++) {
- u8 m, n, c;
- m = (rxmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- n = (rxmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- c = (rxmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
- n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
- rxmcs_cap &= ~(3 << 2*i);
- rxmcs_cap |= (rxmcs_n & (3 << 2*i));
- }
- m = (txmcs_mask >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- n = (txmcs_n >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- c = (txmcs_cap >> 2*i) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- if (m && ((c != IEEE80211_VHT_MCS_NOT_SUPPORTED && n < c) ||
- n == IEEE80211_VHT_MCS_NOT_SUPPORTED)) {
- txmcs_cap &= ~(3 << 2*i);
- txmcs_cap |= (txmcs_n & (3 << 2*i));
- }
- }
- vht_cap->vht_mcs.rx_mcs_map = cpu_to_le16(rxmcs_cap);
- vht_cap->vht_mcs.tx_mcs_map = cpu_to_le16(txmcs_cap);
- }
- void
- ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_supported_band *sband,
- const struct ieee80211_vht_cap *vht_cap_ie,
- const struct ieee80211_vht_cap *vht_cap_ie2,
- struct link_sta_info *link_sta)
- {
- struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
- struct ieee80211_sta_vht_cap own_cap;
- u32 cap_info, i;
- bool have_80mhz;
- u32 mpdu_len;
- memset(vht_cap, 0, sizeof(*vht_cap));
- if (!link_sta->pub->ht_cap.ht_supported)
- return;
- if (!vht_cap_ie || !sband->vht_cap.vht_supported)
- return;
- /* Allow VHT if at least one channel on the sband supports 80 MHz */
- have_80mhz = false;
- for (i = 0; i < sband->n_channels; i++) {
- if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
- IEEE80211_CHAN_NO_80MHZ))
- continue;
- have_80mhz = true;
- break;
- }
- if (!have_80mhz)
- return;
- /*
- * A VHT STA must support 40 MHz, but if we verify that here
- * then we break a few things - some APs (e.g. Netgear R6300v2
- * and others based on the BCM4360 chipset) will unset this
- * capability bit when operating in 20 MHz.
- */
- vht_cap->vht_supported = true;
- own_cap = sband->vht_cap;
- /*
- * If user has specified capability overrides, take care
- * of that if the station we're setting up is the AP that
- * we advertised a restricted capability set to. Override
- * our own capabilities and then use those below.
- */
- if (sdata->vif.type == NL80211_IFTYPE_STATION &&
- !test_sta_flag(link_sta->sta, WLAN_STA_TDLS_PEER))
- ieee80211_apply_vhtcap_overrides(sdata, &own_cap);
- /* take some capabilities as-is */
- cap_info = le32_to_cpu(vht_cap_ie->vht_cap_info);
- vht_cap->cap = cap_info;
- vht_cap->cap &= IEEE80211_VHT_CAP_RXLDPC |
- IEEE80211_VHT_CAP_VHT_TXOP_PS |
- IEEE80211_VHT_CAP_HTC_VHT |
- IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK |
- IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_UNSOL_MFB |
- IEEE80211_VHT_CAP_VHT_LINK_ADAPTATION_VHT_MRQ_MFB |
- IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
- IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN;
- vht_cap->cap |= min_t(u32, cap_info & IEEE80211_VHT_CAP_MAX_MPDU_MASK,
- own_cap.cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK);
- /* and some based on our own capabilities */
- switch (own_cap.cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
- case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
- vht_cap->cap |= cap_info &
- IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
- break;
- case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
- vht_cap->cap |= cap_info &
- IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
- break;
- default:
- /* nothing */
- break;
- }
- /* symmetric capabilities */
- vht_cap->cap |= cap_info & own_cap.cap &
- (IEEE80211_VHT_CAP_SHORT_GI_80 |
- IEEE80211_VHT_CAP_SHORT_GI_160);
- /* remaining ones */
- if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE)
- vht_cap->cap |= cap_info &
- (IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
- IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK);
- if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
- vht_cap->cap |= cap_info &
- (IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
- IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK);
- if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE)
- vht_cap->cap |= cap_info &
- IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE;
- if (own_cap.cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE)
- vht_cap->cap |= cap_info &
- IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE;
- if (own_cap.cap & IEEE80211_VHT_CAP_TXSTBC)
- vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_RXSTBC_MASK;
- if (own_cap.cap & IEEE80211_VHT_CAP_RXSTBC_MASK)
- vht_cap->cap |= cap_info & IEEE80211_VHT_CAP_TXSTBC;
- /* Copy peer MCS info, the driver might need them. */
- memcpy(&vht_cap->vht_mcs, &vht_cap_ie->supp_mcs,
- sizeof(struct ieee80211_vht_mcs_info));
- /* copy EXT_NSS_BW Support value or remove the capability */
- if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_VHT_EXT_NSS_BW))
- vht_cap->cap |= (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
- else
- vht_cap->vht_mcs.tx_highest &=
- ~cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE);
- /* but also restrict MCSes */
- for (i = 0; i < 8; i++) {
- u16 own_rx, own_tx, peer_rx, peer_tx;
- own_rx = le16_to_cpu(own_cap.vht_mcs.rx_mcs_map);
- own_rx = (own_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- own_tx = le16_to_cpu(own_cap.vht_mcs.tx_mcs_map);
- own_tx = (own_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- peer_rx = le16_to_cpu(vht_cap->vht_mcs.rx_mcs_map);
- peer_rx = (peer_rx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- peer_tx = le16_to_cpu(vht_cap->vht_mcs.tx_mcs_map);
- peer_tx = (peer_tx >> i * 2) & IEEE80211_VHT_MCS_NOT_SUPPORTED;
- if (peer_tx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
- if (own_rx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
- peer_tx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
- else if (own_rx < peer_tx)
- peer_tx = own_rx;
- }
- if (peer_rx != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
- if (own_tx == IEEE80211_VHT_MCS_NOT_SUPPORTED)
- peer_rx = IEEE80211_VHT_MCS_NOT_SUPPORTED;
- else if (own_tx < peer_rx)
- peer_rx = own_tx;
- }
- vht_cap->vht_mcs.rx_mcs_map &=
- ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
- vht_cap->vht_mcs.rx_mcs_map |= cpu_to_le16(peer_rx << i * 2);
- vht_cap->vht_mcs.tx_mcs_map &=
- ~cpu_to_le16(IEEE80211_VHT_MCS_NOT_SUPPORTED << i * 2);
- vht_cap->vht_mcs.tx_mcs_map |= cpu_to_le16(peer_tx << i * 2);
- }
- /*
- * This is a workaround for VHT-enabled STAs which break the spec
- * and have the VHT-MCS Rx map filled in with value 3 for all eight
- * spacial streams, an example is AR9462.
- *
- * As per spec, in section 22.1.1 Introduction to the VHT PHY
- * A VHT STA shall support at least single spactial stream VHT-MCSs
- * 0 to 7 (transmit and receive) in all supported channel widths.
- */
- if (vht_cap->vht_mcs.rx_mcs_map == cpu_to_le16(0xFFFF)) {
- vht_cap->vht_supported = false;
- sdata_info(sdata,
- "Ignoring VHT IE from %pM (link:%pM) due to invalid rx_mcs_map\n",
- link_sta->sta->addr, link_sta->addr);
- return;
- }
- /* finally set up the bandwidth */
- switch (vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK) {
- case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ:
- case IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ:
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
- break;
- default:
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
- if (!(vht_cap->vht_mcs.tx_highest &
- cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)))
- break;
- /*
- * If this is non-zero, then it does support 160 MHz after all,
- * in one form or the other. We don't distinguish here (or even
- * above) between 160 and 80+80 yet.
- */
- if (cap_info & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
- link_sta->cur_max_bandwidth =
- IEEE80211_STA_RX_BW_160;
- }
- link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
- /*
- * Work around the Cisco 9115 FW 17.3 bug by taking the min of
- * both reported MPDU lengths.
- */
- mpdu_len = vht_cap->cap & IEEE80211_VHT_CAP_MAX_MPDU_MASK;
- if (vht_cap_ie2)
- mpdu_len = min_t(u32, mpdu_len,
- le32_get_bits(vht_cap_ie2->vht_cap_info,
- IEEE80211_VHT_CAP_MAX_MPDU_MASK));
- /*
- * FIXME - should the amsdu len be per link? store per link
- * and maintain a minimum?
- */
- switch (mpdu_len) {
- case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
- link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
- break;
- case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
- link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
- break;
- case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
- default:
- link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
- break;
- }
- ieee80211_sta_recalc_aggregates(&link_sta->sta->sta);
- }
- /* FIXME: move this to some better location - parses HE/EHT now */
- enum ieee80211_sta_rx_bandwidth
- ieee80211_sta_cap_rx_bw(struct link_sta_info *link_sta)
- {
- unsigned int link_id = link_sta->link_id;
- struct ieee80211_sub_if_data *sdata = link_sta->sta->sdata;
- struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
- struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
- struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
- u32 cap_width;
- if (he_cap->has_he) {
- struct ieee80211_bss_conf *link_conf;
- enum ieee80211_sta_rx_bandwidth ret;
- u8 info;
- rcu_read_lock();
- link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
- if (eht_cap->has_eht &&
- link_conf->chandef.chan->band == NL80211_BAND_6GHZ) {
- info = eht_cap->eht_cap_elem.phy_cap_info[0];
- if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) {
- ret = IEEE80211_STA_RX_BW_320;
- goto out;
- }
- }
- info = he_cap->he_cap_elem.phy_cap_info[0];
- if (link_conf->chandef.chan->band == NL80211_BAND_2GHZ) {
- if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
- ret = IEEE80211_STA_RX_BW_40;
- else
- ret = IEEE80211_STA_RX_BW_20;
- goto out;
- }
- if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
- info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
- ret = IEEE80211_STA_RX_BW_160;
- else if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
- ret = IEEE80211_STA_RX_BW_80;
- else
- ret = IEEE80211_STA_RX_BW_20;
- out:
- rcu_read_unlock();
- return ret;
- }
- if (!vht_cap->vht_supported)
- return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
- IEEE80211_STA_RX_BW_40 :
- IEEE80211_STA_RX_BW_20;
- cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
- if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ ||
- cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
- return IEEE80211_STA_RX_BW_160;
- /*
- * If this is non-zero, then it does support 160 MHz after all,
- * in one form or the other. We don't distinguish here (or even
- * above) between 160 and 80+80 yet.
- */
- if (vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK)
- return IEEE80211_STA_RX_BW_160;
- return IEEE80211_STA_RX_BW_80;
- }
- enum nl80211_chan_width
- ieee80211_sta_cap_chan_bw(struct link_sta_info *link_sta)
- {
- struct ieee80211_sta_vht_cap *vht_cap = &link_sta->pub->vht_cap;
- u32 cap_width;
- if (!vht_cap->vht_supported) {
- if (!link_sta->pub->ht_cap.ht_supported)
- return NL80211_CHAN_WIDTH_20_NOHT;
- return link_sta->pub->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ?
- NL80211_CHAN_WIDTH_40 : NL80211_CHAN_WIDTH_20;
- }
- cap_width = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
- if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
- return NL80211_CHAN_WIDTH_160;
- else if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
- return NL80211_CHAN_WIDTH_80P80;
- return NL80211_CHAN_WIDTH_80;
- }
- enum nl80211_chan_width
- ieee80211_sta_rx_bw_to_chan_width(struct link_sta_info *link_sta)
- {
- enum ieee80211_sta_rx_bandwidth cur_bw =
- link_sta->pub->bandwidth;
- struct ieee80211_sta_vht_cap *vht_cap =
- &link_sta->pub->vht_cap;
- u32 cap_width;
- switch (cur_bw) {
- case IEEE80211_STA_RX_BW_20:
- if (!link_sta->pub->ht_cap.ht_supported)
- return NL80211_CHAN_WIDTH_20_NOHT;
- else
- return NL80211_CHAN_WIDTH_20;
- case IEEE80211_STA_RX_BW_40:
- return NL80211_CHAN_WIDTH_40;
- case IEEE80211_STA_RX_BW_80:
- return NL80211_CHAN_WIDTH_80;
- case IEEE80211_STA_RX_BW_160:
- cap_width =
- vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
- if (cap_width == IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ)
- return NL80211_CHAN_WIDTH_160;
- return NL80211_CHAN_WIDTH_80P80;
- default:
- return NL80211_CHAN_WIDTH_20;
- }
- }
- enum ieee80211_sta_rx_bandwidth
- ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width)
- {
- switch (width) {
- 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;
- case NL80211_CHAN_WIDTH_320:
- return IEEE80211_STA_RX_BW_320;
- 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 link_sta_info *link_sta)
- {
- struct sta_info *sta = link_sta->sta;
- struct ieee80211_bss_conf *link_conf;
- enum nl80211_chan_width bss_width;
- enum ieee80211_sta_rx_bandwidth bw;
- rcu_read_lock();
- link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]);
- if (WARN_ON(!link_conf))
- bss_width = NL80211_CHAN_WIDTH_20_NOHT;
- else
- bss_width = link_conf->chandef.width;
- rcu_read_unlock();
- bw = ieee80211_sta_cap_rx_bw(link_sta);
- bw = min(bw, link_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 link_sta_info *link_sta)
- {
- u8 ht_rx_nss = 0, vht_rx_nss = 0, he_rx_nss = 0, eht_rx_nss = 0, rx_nss;
- bool support_160;
- /* if we received a notification already don't overwrite it */
- if (link_sta->pub->rx_nss)
- return;
- if (link_sta->pub->eht_cap.has_eht) {
- int i;
- const u8 *rx_nss_mcs = (void *)&link_sta->pub->eht_cap.eht_mcs_nss_supp;
- /* get the max nss for EHT over all possible bandwidths and mcs */
- for (i = 0; i < sizeof(struct ieee80211_eht_mcs_nss_supp); i++)
- eht_rx_nss = max_t(u8, eht_rx_nss,
- u8_get_bits(rx_nss_mcs[i],
- IEEE80211_EHT_MCS_NSS_RX));
- }
- if (link_sta->pub->he_cap.has_he) {
- int i;
- u8 rx_mcs_80 = 0, rx_mcs_160 = 0;
- const struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->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_HE_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_HE_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 (link_sta->pub->ht_cap.ht_supported) {
- if (link_sta->pub->ht_cap.mcs.rx_mask[0])
- ht_rx_nss++;
- if (link_sta->pub->ht_cap.mcs.rx_mask[1])
- ht_rx_nss++;
- if (link_sta->pub->ht_cap.mcs.rx_mask[2])
- ht_rx_nss++;
- if (link_sta->pub->ht_cap.mcs.rx_mask[3])
- ht_rx_nss++;
- /* FIXME: consider rx_highest? */
- }
- if (link_sta->pub->vht_cap.vht_supported) {
- int i;
- u16 rx_mcs_map;
- rx_mcs_map = le16_to_cpu(link_sta->pub->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);
- rx_nss = max(eht_rx_nss, rx_nss);
- link_sta->pub->rx_nss = max_t(u8, 1, rx_nss);
- }
- u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
- struct link_sta_info *link_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 (link_sta->pub->rx_nss != nss) {
- link_sta->pub->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 */
- link_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 */
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
- break;
- case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
- if (opmode & IEEE80211_OPMODE_NOTIF_BW_160_80P80)
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
- else
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
- break;
- case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
- /* legacy only, no longer used by newer spec */
- link_sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
- break;
- }
- new_bw = ieee80211_sta_cur_vht_bw(link_sta);
- if (new_bw != link_sta->pub->bandwidth) {
- link_sta->pub->bandwidth = new_bw;
- sta_opmode.bw = ieee80211_sta_rx_bw_to_chan_width(link_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, link_sta->addr,
- &sta_opmode, GFP_KERNEL);
- return changed;
- }
- void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
- struct ieee80211_link_data *link,
- struct ieee80211_mgmt *mgmt)
- {
- struct ieee80211_bss_conf *link_conf = link->conf;
- if (!link_conf->mu_mimo_owner)
- return;
- if (!memcmp(mgmt->u.action.u.vht_group_notif.position,
- link_conf->mu_group.position, WLAN_USER_POSITION_LEN) &&
- !memcmp(mgmt->u.action.u.vht_group_notif.membership,
- link_conf->mu_group.membership, WLAN_MEMBERSHIP_LEN))
- return;
- memcpy(link_conf->mu_group.membership,
- mgmt->u.action.u.vht_group_notif.membership,
- WLAN_MEMBERSHIP_LEN);
- memcpy(link_conf->mu_group.position,
- mgmt->u.action.u.vht_group_notif.position,
- WLAN_USER_POSITION_LEN);
- ieee80211_link_info_change_notify(sdata, link,
- BSS_CHANGED_MU_GROUPS);
- }
- void ieee80211_update_mu_groups(struct ieee80211_vif *vif, unsigned int link_id,
- const u8 *membership, const u8 *position)
- {
- struct ieee80211_bss_conf *link_conf;
- rcu_read_lock();
- link_conf = rcu_dereference(vif->link_conf[link_id]);
- if (!WARN_ON_ONCE(!link_conf || !link_conf->mu_mimo_owner)) {
- memcpy(link_conf->mu_group.membership, membership,
- WLAN_MEMBERSHIP_LEN);
- memcpy(link_conf->mu_group.position, position,
- WLAN_USER_POSITION_LEN);
- }
- rcu_read_unlock();
- }
- EXPORT_SYMBOL_GPL(ieee80211_update_mu_groups);
- void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
- struct link_sta_info *link_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, link_sta,
- opmode, band);
- if (changed > 0) {
- ieee80211_recalc_min_chandef(sdata, link_sta->link_id);
- rate_control_rate_update(local, sband, link_sta->sta,
- link_sta->link_id, 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;
- }
- }
- }
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