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linux/net/mac80211/vht.c
Johannes Berg 751e7489c1 wifi: mac80211: expose ieee80211_chan_width_to_rx_bw() to drivers 
Drivers might need to also do this calculation, no point in
them duplicating the code. Since it's so simple, just make
it an inline.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20241007144851.af003cb4a088.I8b5d29504b726caae24af6013c65b3daebe842a2@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2024-10-23 16:43:38 +02:00

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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 - 2024 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
* spatial 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 spatial 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,
struct cfg80211_chan_def *chandef)
{
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) {
enum nl80211_band band;
u8 info;
if (chandef) {
band = chandef->chan->band;
} else {
struct ieee80211_bss_conf *link_conf;
rcu_read_lock();
link_conf = rcu_dereference(sdata->vif.link_conf[link_id]);
band = link_conf->chanreq.oper.chan->band;
rcu_read_unlock();
}
if (eht_cap->has_eht && band == NL80211_BAND_6GHZ) {
info = eht_cap->eht_cap_elem.phy_cap_info[0];
if (info & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)
return IEEE80211_STA_RX_BW_320;
}
info = he_cap->he_cap_elem.phy_cap_info[0];
if (band == NL80211_BAND_2GHZ) {
if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G)
return IEEE80211_STA_RX_BW_40;
return IEEE80211_STA_RX_BW_20;
}
if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G ||
info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
return IEEE80211_STA_RX_BW_160;
if (info & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)
return IEEE80211_STA_RX_BW_80;
return IEEE80211_STA_RX_BW_20;
}
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;
}
}
/* 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 cfg80211_chan_def *chandef)
{
struct sta_info *sta = link_sta->sta;
enum nl80211_chan_width bss_width;
enum ieee80211_sta_rx_bandwidth bw;
if (chandef) {
bss_width = chandef->width;
} else {
struct ieee80211_bss_conf *link_conf;
rcu_read_lock();
link_conf = rcu_dereference(sta->sdata->vif.link_conf[link_sta->link_id]);
if (WARN_ON_ONCE(!link_conf)) {
rcu_read_unlock();
return IEEE80211_STA_RX_BW_20;
}
bss_width = link_conf->chanreq.oper.width;
rcu_read_unlock();
}
bw = _ieee80211_sta_cap_rx_bw(link_sta, chandef);
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_init_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 (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);
rx_nss = max_t(u8, 1, rx_nss);
link_sta->capa_nss = rx_nss;
/* that shouldn't be set yet, but we can handle it anyway */
if (link_sta->op_mode_nss)
link_sta->pub->rx_nss =
min_t(u8, rx_nss, link_sta->op_mode_nss);
else
link_sta->pub->rx_nss = 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->op_mode_nss != nss) {
if (nss <= link_sta->capa_nss) {
link_sta->op_mode_nss = nss;
if (nss != link_sta->pub->rx_nss) {
link_sta->pub->rx_nss = nss;
changed |= IEEE80211_RC_NSS_CHANGED;
sta_opmode.rx_nss = link_sta->pub->rx_nss;
sta_opmode.changed |= STA_OPMODE_N_SS_CHANGED;
}
} else {
pr_warn_ratelimited("Ignoring NSS change in VHT Operating Mode Notification from %pM with invalid nss %d",
link_sta->pub->addr, nss);
}
}
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, 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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