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 void
  56 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
  57                                   struct ieee80211_supported_band *sband,
  58                                   const u8 *he_cap_ie, u8 he_cap_len,
  59                                   const struct ieee80211_he_6ghz_capa *he_6ghz_capa,
  60                                   struct sta_info *sta)
  61 {
  62         struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
  63         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
  64         u8 he_ppe_size;
  65         u8 mcs_nss_size;
  66         u8 he_total_size;
  67
  68         memset(he_cap, 0, sizeof(*he_cap));
  69
  70         if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
  71                 return;
  72
  73         /* Make sure size is OK */
  74         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
  75         he_ppe_size =
  76                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
  77                                                 mcs_nss_size],
  78                                       he_cap_ie_elem->phy_cap_info);
  79         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
  80                         he_ppe_size;
  81         if (he_cap_len < he_total_size)
  82                 return;
  83
  84         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
  85
  86         /* HE Tx/Rx HE MCS NSS Support Field */
  87         memcpy(&he_cap->he_mcs_nss_supp,
  88                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
  89
  90         /* Check if there are (optional) PPE Thresholds */
  91         if (he_cap->he_cap_elem.phy_cap_info[6] &
  92             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
  93                 memcpy(he_cap->ppe_thres,
  94                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
  95                        he_ppe_size);
  96
  97         he_cap->has_he = true;
  98
  99         sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
 100         sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
 101
 102         if (sband->band == NL80211_BAND_6GHZ && he_6ghz_capa)
 103                 ieee80211_update_from_he_6ghz_capa(he_6ghz_capa, sta);
 104 }
 105
 106 void
 107 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
 108                         const struct ieee80211_he_operation *he_op_ie)
 109 {
 110         memset(&vif->bss_conf.he_oper, 0, sizeof(vif->bss_conf.he_oper));
 111         if (!he_op_ie)
 112                 return;
 113
 114         vif->bss_conf.he_oper.params = __le32_to_cpu(he_op_ie->he_oper_params);
 115         vif->bss_conf.he_oper.nss_set = __le16_to_cpu(he_op_ie->he_mcs_nss_set);
 116 }
 117
 118 void
 119 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
 120                                 const struct ieee80211_he_spr *he_spr_ie_elem)
 121 {
 122         struct ieee80211_he_obss_pd *he_obss_pd =
 123                                         &vif->bss_conf.he_obss_pd;
 124         const u8 *data;
 125
 126         memset(he_obss_pd, 0, sizeof(*he_obss_pd));
 127
 128         if (!he_spr_ie_elem)
 129                 return;
 130         data = he_spr_ie_elem->optional;
 131
 132         if (he_spr_ie_elem->he_sr_control &
 133             IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
 134                 data++;
 135         if (he_spr_ie_elem->he_sr_control &
 136             IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
 137                 he_obss_pd->max_offset = *data++;
 138                 he_obss_pd->min_offset = *data++;
 139                 he_obss_pd->enable = true;
 140         }
 141 }