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 void
  12 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
  13                                   struct ieee80211_supported_band *sband,
  14                                   const u8 *he_cap_ie, u8 he_cap_len,
  15                                   struct sta_info *sta)
  16 {
  17         struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
  18         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
  19         u8 he_ppe_size;
  20         u8 mcs_nss_size;
  21         u8 he_total_size;
  22
  23         memset(he_cap, 0, sizeof(*he_cap));
  24
  25         if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
  26                 return;
  27
  28         /* Make sure size is OK */
  29         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
  30         he_ppe_size =
  31                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
  32                                                 mcs_nss_size],
  33                                       he_cap_ie_elem->phy_cap_info);
  34         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
  35                         he_ppe_size;
  36         if (he_cap_len < he_total_size)
  37                 return;
  38
  39         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
  40
  41         /* HE Tx/Rx HE MCS NSS Support Field */
  42         memcpy(&he_cap->he_mcs_nss_supp,
  43                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
  44
  45         /* Check if there are (optional) PPE Thresholds */
  46         if (he_cap->he_cap_elem.phy_cap_info[6] &
  47             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
  48                 memcpy(he_cap->ppe_thres,
  49                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
  50                        he_ppe_size);
  51
  52         he_cap->has_he = true;
  53
  54         sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(sta);
  55         sta->sta.bandwidth = ieee80211_sta_cur_vht_bw(sta);
  56 }
  57
  58 void
  59 ieee80211_he_op_ie_to_bss_conf(struct ieee80211_vif *vif,
  60                         const struct ieee80211_he_operation *he_op_ie_elem)
  61 {
  62         struct ieee80211_he_operation *he_operation =
  63                                         &vif->bss_conf.he_operation;
  64
  65         if (!he_op_ie_elem) {
  66                 memset(he_operation, 0, sizeof(*he_operation));
  67                 return;
  68         }
  69
  70         vif->bss_conf.he_operation = *he_op_ie_elem;
  71 }
  72
  73 void
  74 ieee80211_he_spr_ie_to_bss_conf(struct ieee80211_vif *vif,
  75                                 const struct ieee80211_he_spr *he_spr_ie_elem)
  76 {
  77         struct ieee80211_he_obss_pd *he_obss_pd =
  78                                         &vif->bss_conf.he_obss_pd;
  79         const u8 *data;
  80
  81         memset(he_obss_pd, 0, sizeof(*he_obss_pd));
  82
  83         if (!he_spr_ie_elem)
  84                 return;
  85         data = he_spr_ie_elem->optional;
  86
  87         if (he_spr_ie_elem->he_sr_control &
  88             IEEE80211_HE_SPR_NON_SRG_OFFSET_PRESENT)
  89                 data++;
  90         if (he_spr_ie_elem->he_sr_control &
  91             IEEE80211_HE_SPR_SRG_INFORMATION_PRESENT) {
  92                 he_obss_pd->max_offset = *data++;
  93                 he_obss_pd->min_offset = *data++;
  94                 he_obss_pd->enable = true;
  95         }
  96 }