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 - 2023 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                 link_sta->pub->smps_mode = smps_mode;
  35         } else {
  36                 link_sta->pub->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                 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_11454;
  43                 break;
  44         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_7991:
  45                 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_7991;
  46                 break;
  47         case IEEE80211_VHT_CAP_MAX_MPDU_LENGTH_3895:
  48         default:
  49                 link_sta->pub->agg.max_amsdu_len = IEEE80211_MAX_MPDU_LEN_VHT_3895;
  50                 break;
  51         }
  52
  53         ieee80211_sta_recalc_aggregates(&sta->sta);
  54
  55         link_sta->pub->he_6ghz_capa = *he_6ghz_capa;
  56 }
  57
  58 static void ieee80211_he_mcs_disable(__le16 *he_mcs)
  59 {
  60         u32 i;
  61
  62         for (i = 0; i < 8; i++)
  63                 *he_mcs |= cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
  64 }
  65
  66 static void ieee80211_he_mcs_intersection(__le16 *he_own_rx, __le16 *he_peer_rx,
  67                                           __le16 *he_own_tx, __le16 *he_peer_tx)
  68 {
  69         u32 i;
  70         u16 own_rx, own_tx, peer_rx, peer_tx;
  71
  72         for (i = 0; i < 8; i++) {
  73                 own_rx = le16_to_cpu(*he_own_rx);
  74                 own_rx = (own_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  75
  76                 own_tx = le16_to_cpu(*he_own_tx);
  77                 own_tx = (own_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  78
  79                 peer_rx = le16_to_cpu(*he_peer_rx);
  80                 peer_rx = (peer_rx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  81
  82                 peer_tx = le16_to_cpu(*he_peer_tx);
  83                 peer_tx = (peer_tx >> i * 2) & IEEE80211_HE_MCS_NOT_SUPPORTED;
  84
  85                 if (peer_tx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  86                         if (own_rx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  87                                 peer_tx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  88                         else if (own_rx < peer_tx)
  89                                 peer_tx = own_rx;
  90                 }
  91
  92                 if (peer_rx != IEEE80211_HE_MCS_NOT_SUPPORTED) {
  93                         if (own_tx == IEEE80211_HE_MCS_NOT_SUPPORTED)
  94                                 peer_rx = IEEE80211_HE_MCS_NOT_SUPPORTED;
  95                         else if (own_tx < peer_rx)
  96                                 peer_rx = own_tx;
  97                 }
  98
  99                 *he_peer_rx &=
 100                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
 101                 *he_peer_rx |= cpu_to_le16(peer_rx << i * 2);
 102
 103                 *he_peer_tx &=
 104                         ~cpu_to_le16(IEEE80211_HE_MCS_NOT_SUPPORTED << i * 2);
 105                 *he_peer_tx |= cpu_to_le16(peer_tx << i * 2);
 106         }
 107 }
 108
 109 void
 110 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
 111                                   struct ieee80211_supported_band *sband,
 112                                   const u8 *he_cap_ie, u8 he_cap_len,
 113                                   const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
 114                                   struct link_sta_info *link_sta)
 115 {
 116         struct ieee80211_sta_he_cap *he_cap = &link_sta->pub->he_cap;
 117         const struct ieee80211_sta_he_cap *own_he_cap_ptr;
 118         struct ieee80211_sta_he_cap own_he_cap;
 119         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
 120         u8 he_ppe_size;
 121         u8 mcs_nss_size;
 122         u8 he_total_size;
 123         bool own_160, peer_160, own_80p80, peer_80p80;
 124
 125         memset(he_cap, 0, sizeof(*he_cap));
 126
 127         if (!he_cap_ie)
 128                 return;
 129
 130         own_he_cap_ptr =
 131                 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif);
 132         if (!own_he_cap_ptr)
 133                 return;
 134
 135         own_he_cap = *own_he_cap_ptr;
 136
 137         /* Make sure size is OK */
 138         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
 139         he_ppe_size =
 140                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
 141                                                 mcs_nss_size],
 142                                       he_cap_ie_elem->phy_cap_info);
 143         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
 144                         he_ppe_size;
 145         if (he_cap_len < he_total_size)
 146                 return;
 147
 148         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
 149
 150         /* HE Tx/Rx HE MCS NSS Support Field */
 151         memcpy(&he_cap->he_mcs_nss_supp,
 152                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
 153
 154         /* Check if there are (optional) PPE Thresholds */
 155         if (he_cap->he_cap_elem.phy_cap_info[6] &
 156             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
 157                 memcpy(he_cap->ppe_thres,
 158                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
 159                        he_ppe_size);
 160
 161         he_cap->has_he = true;
 162
 163         link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
 164         link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
 165
 166         if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
 167                 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, link_sta);
 168
 169         ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80,
 170                                       &he_cap->he_mcs_nss_supp.rx_mcs_80,
 171                                       &own_he_cap.he_mcs_nss_supp.tx_mcs_80,
 172                                       &he_cap->he_mcs_nss_supp.tx_mcs_80);
 173
 174         own_160 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 175                   IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 176         peer_160 = he_cap->he_cap_elem.phy_cap_info[0] &
 177                    IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 178
 179         if (peer_160 && own_160) {
 180                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_160,
 181                                               &he_cap->he_mcs_nss_supp.rx_mcs_160,
 182                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_160,
 183                                               &he_cap->he_mcs_nss_supp.tx_mcs_160);
 184         } else if (peer_160 && !own_160) {
 185                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_160);
 186                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_160);
 187                 he_cap->he_cap_elem.phy_cap_info[0] &=
 188                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
 189         }
 190
 191         own_80p80 = own_he_cap.he_cap_elem.phy_cap_info[0] &
 192                     IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 193         peer_80p80 = he_cap->he_cap_elem.phy_cap_info[0] &
 194                      IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 195
 196         if (peer_80p80 && own_80p80) {
 197                 ieee80211_he_mcs_intersection(&own_he_cap.he_mcs_nss_supp.rx_mcs_80p80,
 198                                               &he_cap->he_mcs_nss_supp.rx_mcs_80p80,
 199                                               &own_he_cap.he_mcs_nss_supp.tx_mcs_80p80,
 200                                               &he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 201         } else if (peer_80p80 && !own_80p80) {
 202                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.rx_mcs_80p80);
 203                 ieee80211_he_mcs_disable(&he_cap->he_mcs_nss_supp.tx_mcs_80p80);
 204                 he_cap->he_cap_elem.phy_cap_info[0] &=
 205                         ~IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
 206         }
 207 }
 208
 209 void
 210 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
 211                         const struct ieee80211_he_operation *he_op_ie)
 212 {
 213         memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
 214         if (!he_op_ie)
 215                 return;
 216
 217         vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
 218         vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
 219 }
 220
 221 void
 222 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
 223                                 const struct ieee80211_he_spr *he_spr_ie_elem)
 224 {
 225         struct ieee80211_he_obss_pd *he_obss_pd =
 226                                         &vif->bss_conf.he_obss_pd;
 227         const u8 *data;
 228
 229         memset(he_obss_pd, 0, sizeof(*he_obss_pd));
 230
 231         if (!he_spr_ie_elem)
 232                 return;
 233         data = he_spr_ie_elem->optional;
 234
 235         if (he_spr_ie_elem->he_sr_control &
 236             IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
 237                 data++;
 238         if (he_spr_ie_elem->he_sr_control &
 239             IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
 240                 he_obss_pd->max_offset = *data++;
 241                 he_obss_pd->min_offset = *data++;
 242                 he_obss_pd->enable = true;
 243         }
 244 }