net/mac80211/he.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * HE handling
   4  *
   5  * Copyright(c) 2017 Intel Deutschland GmbH
   6  * Copyright(c) 2019 - 2020 Intel Corporation
   7  */
   8
   9 #include "ieee80211_i.h"
  10
  11 static void
  12 ieee80211_update_from_he_6ghz_capa(const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
  13                                    struct sta_info *sta)
  14 {
  15         enum ieee80211_smps_mode smps_mode;
  16
  17         if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
  18             sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
  19                 switch (le16_get_bits(he_6ghz_capa->capa,
  20                                       IEEE80211_HE_6GHZ_CAP_SM_PS)) {
  21                 case WLAN_HT_CAP_SM_PS_INVALID:
  22                 case WLAN_HT_CAP_SM_PS_STATIC:
  23                         smps_mode = IEEE80211_SMPS_STATIC;
  24                         break;
  25                 case WLAN_HT_CAP_SM_PS_DYNAMIC:
  26                         smps_mode = IEEE80211_SMPS_DYNAMIC;
  27                         break;
  28                 case WLAN_HT_CAP_SM_PS_DISABLED:
  29                         smps_mode = IEEE80211_SMPS_OFF;
  30                         break;
  31                 }
  32
  33                 sta->sta.smps_mode = smps_mode;
  34         } else {
  35                 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
  36         }
  37
  38         switch (le16_get_bits(he_6ghz_capa->capa,
  39                               IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
  40         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
  41                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
  42                 break;
  43         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
  44                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
  45                 break;
  46         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
  47         default:
  48                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
  49                 break;
  50         }
  51
  52         sta->sta.he_6ghz_capa = *he_6ghz_capa;
  53 }
  54
  55 static void ieee80211_he_mcs_disable(__le16 *he_mcs)
  56 {
  57         u32 i;
  58
  59         for (i = 0; i < 8; i++)
  60                 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
  61 }
  62
  63 static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
  64                                           __le16 *he_own_tx, __le16 *he_peer_tx)
  65 {
  66         u32 i;
  67         u16 own_rx, own_tx, peer_rx, peer_tx;
  68
  69         for (i = 0; i < 8; i++) {
  70                 own_rx = le16_to_cpu(*he_own_rx);
  71                 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  72
  73                 own_tx = le16_to_cpu(*he_own_tx);
  74                 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  75
  76                 peer_rx = le16_to_cpu(*he_peer_rx);
  77                 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  78
  79                 peer_tx = le16_to_cpu(*he_peer_tx);
  80                 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  81
  82                 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  83                         if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  84                                 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  85                         else if (own_rx < peer_tx)
  86                                 peer_tx = own_rx;
  87                 }
  88
  89                 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  90                         if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  91                                 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  92                         else if (own_tx < peer_rx)
  93                                 peer_rx = own_tx;
  94                 }
  95
  96                 *he_peer_rx &=
  97                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
  98                 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
  99
 100                 *he_peer_tx &=
 101                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
 102                 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
 103         }
 104 }
 105
 106 void
 107 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
 108                                   struct ieee80211_supported_band *sband,
 109                                   const u8 *he_cap_ie, u8 he_cap_len,
 110                                   const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 111                                   struct sta_info *sta)
 112 {
 113         struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
 114         struct ieee80211_sta_he_cap own_he_cap;
 115         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
 116         u8 he_ppe_size;
 117         u8 mcs_nss_size;
 118         u8 he_total_size;
 119         bool own_160, peer_160, own_80p80, peer_80p80;
 120
 121         memset(he_cap, 0, sizeof(*he_cap));
 122
 123         if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
 124                 return;
 125
 126         own_he_cap = sband->iftype_data->he_cap;
 127
 128         /* Make sure size is OK */
 129         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
 130         he_ppe_size =
 131                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
 132                                                 mcs_nss_size],
 133                                       he_cap_ie_elem->phy_cap_info);
 134         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
 135                         he_ppe_size;
 136         if (he_cap_len < he_total_size)
 137                 return;
 138
 139         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
 140
 141         /* HE Tx/Rx HE MCS NSS Support Field */
 142         memcpy(&he_cap->he_mcs_nss_supp,
 143                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
 144
 145         /* Check if there are (optional) PPE Thresholds */
 146         if (he_cap->he_cap_elem.phy_cap_info[6] &
 147             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
 148                 memcpy(he_cap->ppe_thres,
 149                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
 150                        he_ppe_size);
 151
 152         he_cap->has_he = true;
 153
 154         sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
 155         sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
 156
 157         if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
 158                 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta);
 159
 160         ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
 161                                       &he_cap->he_mcs_nss_supp.rx_mcs_80,
 162                                       &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
 163                                       &he_cap->he_mcs_nss_supp.tx_mcs_80);
 164
 165         own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 166                   IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 167         peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
 168                    IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 169
 170         if (peer_160 && own_160) {
 171                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
 172                                               &he_cap->he_mcs_nss_supp.rx_mcs_160,
 173                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
 174                                               &he_cap->he_mcs_nss_supp.tx_mcs_160);
 175         } else if (peer_160 && !own_160) {
 176                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
 177                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
 178                 he_cap->he_cap_elem.phy_cap_info[0] &=
 179                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 180         }
 181
 182         own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 183                     IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 184         peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
 185                      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 186
 187         if (peer_80p80 && own_80p80) {
 188                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
 189                                               &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
 190                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
 191                                               &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 192         } else if (peer_80p80 && !own_80p80) {
 193                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
 194                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 195                 he_cap->he_cap_elem.phy_cap_info[0] &=
 196                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 197         }
 198 }
 199
 200 void
 201 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
 202                         const struct ieee80211_he_operation *he_op_ie)
 203 {
 204         memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
 205         if (!he_op_ie)
 206                 return;
 207
 208         vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
 209         vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
 210 }
 211
 212 void
 213 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
 214                                 const struct ieee80211_he_spr *he_spr_ie_elem)
 215 {
 216         struct ieee80211_he_obss_pd *he_obss_pd =
 217                                         &vif->bss_conf.he_obss_pd;
 218         const u8 *data;
 219
 220         memset(he_obss_pd, 0, sizeof(*he_obss_pd));
 221
 222         if (!he_spr_ie_elem)
 223                 return;
 224         data = he_spr_ie_elem->optional;
 225
 226         if (he_spr_ie_elem->he_sr_control &
 227             IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
 228                 data++;
 229         if (he_spr_ie_elem->he_sr_control &
 230             IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
 231                 he_obss_pd->max_offset = *data++;
 232                 he_obss_pd->min_offset = *data++;
 233                 he_obss_pd->enable = true;
 234         }
 235 }