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Diffstat (limited to 'net/mac80211/vht.c')
-rw-r--r--net/mac80211/vht.c212
1 files changed, 211 insertions, 1 deletions
diff --git a/net/mac80211/vht.c b/net/mac80211/vht.c
index a2c2258bc84e..171344d4eb7c 100644
--- a/net/mac80211/vht.c
+++ b/net/mac80211/vht.c
@@ -13,6 +13,104 @@
#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,
@@ -20,6 +118,8 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
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));
@@ -35,12 +135,122 @@ ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
vht_cap->vht_supported = true;
- vht_cap->cap = le32_to_cpu(vht_cap_ie->vht_cap_info);
+ 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_BEAMFORMER_ANTENNAS_MAX |
+ IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MAX);
+ }
+
+ if (own_cap.cap & IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)
+ vht_cap->cap |= cap_info &
+ IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
+
+ 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: