425 строки
13 KiB
C
425 строки
13 KiB
C
/*
|
|
* VHT handling
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#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,
|
|
struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
|
|
struct ieee80211_sta_vht_cap own_cap;
|
|
u32 cap_info, i;
|
|
|
|
memset(vht_cap, 0, sizeof(*vht_cap));
|
|
|
|
if (!sta->sta.ht_cap.ht_supported)
|
|
return;
|
|
|
|
if (!vht_cap_ie || !sband->vht_cap.vht_supported)
|
|
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(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_MAX_MPDU_LENGTH_3895 |
|
|
IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991 |
|
|
IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454 |
|
|
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;
|
|
|
|
/* 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));
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* 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:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
|
|
break;
|
|
default:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
|
|
}
|
|
|
|
sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
|
|
}
|
|
|
|
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sta_vht_cap *vht_cap = &sta->sta.vht_cap;
|
|
u32 cap_width;
|
|
|
|
if (!vht_cap->vht_supported)
|
|
return sta->sta.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;
|
|
|
|
return IEEE80211_STA_RX_BW_80;
|
|
}
|
|
|
|
static 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;
|
|
default:
|
|
WARN_ON_ONCE(1);
|
|
return IEEE80211_STA_RX_BW_20;
|
|
}
|
|
}
|
|
|
|
enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = sta->sdata;
|
|
enum ieee80211_sta_rx_bandwidth bw;
|
|
|
|
bw = ieee80211_chan_width_to_rx_bw(sdata->vif.bss_conf.chandef.width);
|
|
bw = min(bw, ieee80211_sta_cap_rx_bw(sta));
|
|
bw = min(bw, sta->cur_max_bandwidth);
|
|
|
|
return bw;
|
|
}
|
|
|
|
void ieee80211_sta_set_rx_nss(struct sta_info *sta)
|
|
{
|
|
u8 ht_rx_nss = 0, vht_rx_nss = 0;
|
|
|
|
/* if we received a notification already don't overwrite it */
|
|
if (sta->sta.rx_nss)
|
|
return;
|
|
|
|
if (sta->sta.ht_cap.ht_supported) {
|
|
if (sta->sta.ht_cap.mcs.rx_mask[0])
|
|
ht_rx_nss++;
|
|
if (sta->sta.ht_cap.mcs.rx_mask[1])
|
|
ht_rx_nss++;
|
|
if (sta->sta.ht_cap.mcs.rx_mask[2])
|
|
ht_rx_nss++;
|
|
if (sta->sta.ht_cap.mcs.rx_mask[3])
|
|
ht_rx_nss++;
|
|
/* FIXME: consider rx_highest? */
|
|
}
|
|
|
|
if (sta->sta.vht_cap.vht_supported) {
|
|
int i;
|
|
u16 rx_mcs_map;
|
|
|
|
rx_mcs_map = le16_to_cpu(sta->sta.vht_cap.vht_mcs.rx_mcs_map);
|
|
|
|
for (i = 7; i >= 0; i--) {
|
|
u8 mcs = (rx_mcs_map >> (2 * i)) & 3;
|
|
|
|
if (mcs != IEEE80211_VHT_MCS_NOT_SUPPORTED) {
|
|
vht_rx_nss = i + 1;
|
|
break;
|
|
}
|
|
}
|
|
/* FIXME: consider rx_highest? */
|
|
}
|
|
|
|
ht_rx_nss = max(ht_rx_nss, vht_rx_nss);
|
|
sta->sta.rx_nss = max_t(u8, 1, ht_rx_nss);
|
|
}
|
|
|
|
u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta, u8 opmode,
|
|
enum ieee80211_band band, bool nss_only)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband;
|
|
enum ieee80211_sta_rx_bandwidth new_bw;
|
|
u32 changed = 0;
|
|
u8 nss;
|
|
|
|
sband = local->hw.wiphy->bands[band];
|
|
|
|
/* ignore - no support for BF yet */
|
|
if (opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)
|
|
return 0;
|
|
|
|
nss = opmode & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
|
|
nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
|
|
nss += 1;
|
|
|
|
if (sta->sta.rx_nss != nss) {
|
|
sta->sta.rx_nss = nss;
|
|
changed |= IEEE80211_RC_NSS_CHANGED;
|
|
}
|
|
|
|
if (nss_only)
|
|
return changed;
|
|
|
|
switch (opmode & IEEE80211_OPMODE_NOTIF_CHANWIDTH_MASK) {
|
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_20MHZ:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_20;
|
|
break;
|
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_40MHZ:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_40;
|
|
break;
|
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_80MHZ:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_80;
|
|
break;
|
|
case IEEE80211_OPMODE_NOTIF_CHANWIDTH_160MHZ:
|
|
sta->cur_max_bandwidth = IEEE80211_STA_RX_BW_160;
|
|
break;
|
|
}
|
|
|
|
new_bw = ieee80211_sta_cur_vht_bw(sta);
|
|
if (new_bw != sta->sta.bandwidth) {
|
|
sta->sta.bandwidth = new_bw;
|
|
changed |= IEEE80211_RC_BW_CHANGED;
|
|
}
|
|
|
|
return changed;
|
|
}
|
|
|
|
void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
|
|
struct sta_info *sta, u8 opmode,
|
|
enum ieee80211_band band, bool nss_only)
|
|
{
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band];
|
|
|
|
u32 changed = __ieee80211_vht_handle_opmode(sdata, sta, opmode,
|
|
band, nss_only);
|
|
|
|
if (changed > 0)
|
|
rate_control_rate_update(local, sband, sta, changed);
|
|
}
|