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 - 2022 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 link_sta_info *link_sta)
  14 {
  15         struct sta_info *sta = link_sta->sta;
  16         enum ieee80211_smps_mode smps_mode;
  17
  18         if (sta->sdata->vif.type == NL80211_IFTYPE_AP ||
  19             sta->sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
  20                 switch (le16_get_bits(he_6ghz_capa->capa,
  21                                       IEEE80211_HE_6GHZ_CAP_SM_PS)) {
  22                 case WLAN_HT_CAP_SM_PS_INVALID:
  23                 case WLAN_HT_CAP_SM_PS_STATIC:
  24                         smps_mode = IEEE80211_SMPS_STATIC;
  25                         break;
  26                 case WLAN_HT_CAP_SM_PS_DYNAMIC:
  27                         smps_mode = IEEE80211_SMPS_DYNAMIC;
  28                         break;
  29                 case WLAN_HT_CAP_SM_PS_DISABLED:
  30                         smps_mode = IEEE80211_SMPS_OFF;
  31                         break;
  32                 }
  33
  34                 sta->sta.smps_mode = smps_mode;
  35         } else {
  36                 sta->sta.smps_mode = IEEE80211_SMPS_OFF;
  37         }
  38
  39         switch (le16_get_bits(he_6ghz_capa->capa,
  40                               IEEE80211_HE_6GHZ_CAP_MAX_MPDU_LEN)) {
  41         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_11454:
  42                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
  43                 break;
  44         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
  45                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
  46                 break;
  47         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
  48         default:
  49                 sta->sta.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
  50                 break;
  51         }
  52
  53         link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
  54 }
  55
  56 static void ieee80211_he_mcs_disable(__le16 *he_mcs)
  57 {
  58         u32 i;
  59
  60         for (i = 0; i < 8; i++)
  61                 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
  62 }
  63
  64 static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
  65                                           __le16 *he_own_tx, __le16 *he_peer_tx)
  66 {
  67         u32 i;
  68         u16 own_rx, own_tx, peer_rx, peer_tx;
  69
  70         for (i = 0; i < 8; i++) {
  71                 own_rx = le16_to_cpu(*he_own_rx);
  72                 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  73
  74                 own_tx = le16_to_cpu(*he_own_tx);
  75                 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  76
  77                 peer_rx = le16_to_cpu(*he_peer_rx);
  78                 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  79
  80                 peer_tx = le16_to_cpu(*he_peer_tx);
  81                 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  82
  83                 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  84                         if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  85                                 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  86                         else if (own_rx < peer_tx)
  87                                 peer_tx = own_rx;
  88                 }
  89
  90                 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  91                         if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  92                                 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  93                         else if (own_tx < peer_rx)
  94                                 peer_rx = own_tx;
  95                 }
  96
  97                 *he_peer_rx &=
  98                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
  99                 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
 100
 101                 *he_peer_tx &=
 102                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
 103                 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
 104         }
 105 }
 106
 107 void
 108 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
 109                                   struct ieee80211_supported_band *sband,
 110                                   const u8 *he_cap_ie, u8 he_cap_len,
 111                                   const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 112                                   struct link_sta_info *link_sta)
 113 {
 114         struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
 115         struct ieee80211_sta_he_cap own_he_cap;
 116         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
 117         u8 he_ppe_size;
 118         u8 mcs_nss_size;
 119         u8 he_total_size;
 120         bool own_160, peer_160, own_80p80, peer_80p80;
 121
 122         memset(he_cap, 0, sizeof(*he_cap));
 123
 124         if (!he_cap_ie ||
 125             !ieee80211_get_he_iftype_cap(sband,
 126                                          ieee80211_vif_type_p2p(&sdata->vif)))
 127                 return;
 128
 129         own_he_cap = sband->iftype_data->he_cap;
 130
 131         /* Make sure size is OK */
 132         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
 133         he_ppe_size =
 134                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
 135                                                 mcs_nss_size],
 136                                       he_cap_ie_elem->phy_cap_info);
 137         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
 138                         he_ppe_size;
 139         if (he_cap_len < he_total_size)
 140                 return;
 141
 142         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
 143
 144         /* HE Tx/Rx HE MCS NSS Support Field */
 145         memcpy(&he_cap->he_mcs_nss_supp,
 146                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
 147
 148         /* Check if there are (optional) PPE Thresholds */
 149         if (he_cap->he_cap_elem.phy_cap_info[6] &
 150             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
 151                 memcpy(he_cap->ppe_thres,
 152                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
 153                        he_ppe_size);
 154
 155         he_cap->has_he = true;
 156
 157         link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
 158         link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
 159
 160         if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
 161                 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
 162
 163         ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
 164                                       &he_cap->he_mcs_nss_supp.rx_mcs_80,
 165                                       &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
 166                                       &he_cap->he_mcs_nss_supp.tx_mcs_80);
 167
 168         own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 169                   IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 170         peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
 171                    IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 172
 173         if (peer_160 && own_160) {
 174                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
 175                                               &he_cap->he_mcs_nss_supp.rx_mcs_160,
 176                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
 177                                               &he_cap->he_mcs_nss_supp.tx_mcs_160);
 178         } else if (peer_160 && !own_160) {
 179                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
 180                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
 181                 he_cap->he_cap_elem.phy_cap_info[0] &=
 182                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 183         }
 184
 185         own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 186                     IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 187         peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
 188                      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 189
 190         if (peer_80p80 && own_80p80) {
 191                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
 192                                               &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
 193                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
 194                                               &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 195         } else if (peer_80p80 && !own_80p80) {
 196                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
 197                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 198                 he_cap->he_cap_elem.phy_cap_info[0] &=
 199                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 200         }
 201 }
 202
 203 void
 204 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
 205                         const struct ieee80211_he_operation *he_op_ie)
 206 {
 207         memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
 208         if (!he_op_ie)
 209                 return;
 210
 211         vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
 212         vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
 213 }
 214
 215 void
 216 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
 217                                 const struct ieee80211_he_spr *he_spr_ie_elem)
 218 {
 219         struct ieee80211_he_obss_pd *he_obss_pd =
 220                                         &vif->bss_conf.he_obss_pd;
 221         const u8 *data;
 222
 223         memset(he_obss_pd, 0, sizeof(*he_obss_pd));
 224
 225         if (!he_spr_ie_elem)
 226                 return;
 227         data = he_spr_ie_elem->optional;
 228
 229         if (he_spr_ie_elem->he_sr_control &
 230             IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
 231                 data++;
 232         if (he_spr_ie_elem->he_sr_control &
 233             IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
 234                 he_obss_pd->max_offset = *data++;
 235                 he_obss_pd->min_offset = *data++;
 236                 he_obss_pd->enable = true;
 237         }
 238 }