mac80211: reduce peer HE MCS/NSS to own capabilities

[linux-2.6-block.git] / net / mac80211 / he.c

diff --git a/net/mac80211/he.c b/net/mac80211/he.c
index cc26f239838ba698987c776c456336254a4fd120..0c0b970835ceb210f926140f0d01fc97e2f81e32 100644 (file)
--- a/net/mac80211/he.c
+++ b/net/mac80211/he.c
@@ -52,6 +52,57 @@ ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_
        sta->sta.he_6ghz_capa = *he_6ghz_capa;
 }
 
+static void ieee80211_he_mcs_disable(__le16 *he_mcs)
+{
+       u32 i;
+
+       for (i = 0; i < 8; i++)
+               *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
+}
+
+static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
+                                         __le16 *he_own_tx, __le16 *he_peer_tx)
+{
+       u32 i;
+       u16 own_rx, own_tx, peer_rx, peer_tx;
+
+       for (i = 0; i < 8; i++) {
+               own_rx = le16_to_cpu(*he_own_rx);
+               own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
+
+               own_tx = le16_to_cpu(*he_own_tx);
+               own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
+
+               peer_rx = le16_to_cpu(*he_peer_rx);
+               peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
+
+               peer_tx = le16_to_cpu(*he_peer_tx);
+               peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
+
+               if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
+                       if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
+                               peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
+                       else if (own_rx < peer_tx)
+                               peer_tx = own_rx;
+               }
+
+               if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
+                       if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
+                               peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
+                       else if (own_tx < peer_rx)
+                               peer_rx = own_tx;
+               }
+
+               *he_peer_rx &=
+                       ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
+               *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
+
+               *he_peer_tx &=
+                       ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
+               *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
+       }
+}
+
 void
 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
                                  struct ieee80211_supported_band *sband,
@@ -60,10 +111,12 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
                                  struct sta_info *sta)
 {
        struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
+       struct ieee80211_sta_he_cap own_he_cap = sband->iftype_data->he_cap;
        struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
        u8 he_ppe_size;
        u8 mcs_nss_size;
        u8 he_total_size;
+       bool own_160, peer_160, own_80p80, peer_80p80;
 
        memset(he_cap, 0, sizeof(*he_cap));
 
@@ -101,6 +154,45 @@ ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
 
        if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
                ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta);
+
+       ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
+                                     &he_cap->he_mcs_nss_supp.rx_mcs_80,
+                                     &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
+                                     &he_cap->he_mcs_nss_supp.tx_mcs_80);
+
+       own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
+                 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
+       peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
+                  IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
+
+       if (peer_160 && own_160) {
+               ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
+                                             &he_cap->he_mcs_nss_supp.rx_mcs_160,
+                                             &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
+                                             &he_cap->he_mcs_nss_supp.tx_mcs_160);
+       } else if (peer_160 && !own_160) {
+               ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
+               ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
+               he_cap->he_cap_elem.phy_cap_info[0] &=
+                       ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
+       }
+
+       own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
+                   IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
+       peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
+                    IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
+
+       if (peer_80p80 && own_80p80) {
+               ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
+                                             &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
+                                             &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
+                                             &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
+       } else if (peer_80p80 && !own_80p80) {
+               ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
+               ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
+               he_cap->he_cap_elem.phy_cap_info[0] &=
+                       ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
+       }
 }
 
 void