Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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;
+		}
+	}
+}