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-rw-r--r--net/mac80211/vht.c778
1 files changed, 778 insertions, 0 deletions
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
new file mode 100644
index 000000000..f7526be8a
--- /dev/null
+++ b/net/mac80211/vht.c
@@ -0,0 +1,778 @@
+// 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;
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 15:47:33 +0000