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  */
   7
   8 #include "ieee80211_i.h"
   9
  10 void
  11 ieee80211_he_cap_ie_to_sta_he_cap(struct ieee80211_sub_if_data *sdata,
  12                                   struct ieee80211_supported_band *sband,
  13                                   const u8 *he_cap_ie, u8 he_cap_len,
  14                                   struct sta_info *sta)
  15 {
  16         struct ieee80211_sta_he_cap *he_cap = &sta->sta.he_cap;
  17         struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
  18         u8 he_ppe_size;
  19         u8 mcs_nss_size;
  20         u8 he_total_size;
  21
  22         memset(he_cap, 0, sizeof(*he_cap));
  23
  24         if (!he_cap_ie || !ieee80211_get_he_sta_cap(sband))
  25                 return;
  26
  27         /* Make sure size is OK */
  28         mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap_ie_elem);
  29         he_ppe_size =
  30                 ieee80211_he_ppe_size(he_cap_ie[sizeof(he_cap->he_cap_elem) +
  31                                                 mcs_nss_size],
  32                                       he_cap_ie_elem->phy_cap_info);
  33         he_total_size = sizeof(he_cap->he_cap_elem) + mcs_nss_size +
  34                         he_ppe_size;
  35         if (he_cap_len < he_total_size)
  36                 return;
  37
  38         memcpy(&he_cap->he_cap_elem, he_cap_ie, sizeof(he_cap->he_cap_elem));
  39
  40         /* HE Tx/Rx HE MCS NSS Support Field */
  41         memcpy(&he_cap->he_mcs_nss_supp,
  42                &he_cap_ie[sizeof(he_cap->he_cap_elem)], mcs_nss_size);
  43
  44         /* Check if there are (optional) PPE Thresholds */
  45         if (he_cap->he_cap_elem.phy_cap_info[6] &
  46             IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT)
  47                 memcpy(he_cap->ppe_thres,
  48                        &he_cap_ie[sizeof(he_cap->he_cap_elem) + mcs_nss_size],
  49                        he_ppe_size);
  50
  51         he_cap->has_he = true;
  52 }