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-rw-r--r--net/mac80211/eht.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/net/mac80211/eht.c b/net/mac80211/eht.c
new file mode 100644
index 0000000000..ddc7acc683
--- /dev/null
+++ b/net/mac80211/eht.c
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * EHT handling
+ *
+ * Copyright(c) 2021-2023 Intel Corporation
+ */
+
+#include "ieee80211_i.h"
+
+void
+ieee80211_eht_cap_ie_to_sta_eht_cap(struct ieee80211_sub_if_data *sdata,
+ struct ieee80211_supported_band *sband,
+ const u8 *he_cap_ie, u8 he_cap_len,
+ const struct ieee80211_eht_cap_elem *eht_cap_ie_elem,
+ u8 eht_cap_len,
+ struct link_sta_info *link_sta)
+{
+ struct ieee80211_sta_eht_cap *eht_cap = &link_sta->pub->eht_cap;
+ struct ieee80211_he_cap_elem *he_cap_ie_elem = (void *)he_cap_ie;
+ u8 eht_ppe_size = 0;
+ u8 mcs_nss_size;
+ u8 eht_total_size = sizeof(eht_cap->eht_cap_elem);
+ u8 *pos = (u8 *)eht_cap_ie_elem;
+
+ memset(eht_cap, 0, sizeof(*eht_cap));
+
+ if (!eht_cap_ie_elem ||
+ !ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif))
+ return;
+
+ mcs_nss_size = ieee80211_eht_mcs_nss_size(he_cap_ie_elem,
+ &eht_cap_ie_elem->fixed,
+ sdata->vif.type ==
+ NL80211_IFTYPE_STATION);
+
+ eht_total_size += mcs_nss_size;
+
+ /* Calculate the PPE thresholds length only if the header is present */
+ if (eht_cap_ie_elem->fixed.phy_cap_info[5] &
+ IEEE80211_EHT_PHY_CAP5_PPE_THRESHOLD_PRESENT) {
+ u16 eht_ppe_hdr;
+
+ if (eht_cap_len < eht_total_size + sizeof(u16))
+ return;
+
+ eht_ppe_hdr = get_unaligned_le16(eht_cap_ie_elem->optional + mcs_nss_size);
+ eht_ppe_size =
+ ieee80211_eht_ppe_size(eht_ppe_hdr,
+ eht_cap_ie_elem->fixed.phy_cap_info);
+ eht_total_size += eht_ppe_size;
+
+ /* we calculate as if NSS > 8 are valid, but don't handle that */
+ if (eht_ppe_size > sizeof(eht_cap->eht_ppe_thres))
+ return;
+ }
+
+ if (eht_cap_len < eht_total_size)
+ return;
+
+ /* Copy the static portion of the EHT capabilities */
+ memcpy(&eht_cap->eht_cap_elem, pos, sizeof(eht_cap->eht_cap_elem));
+ pos += sizeof(eht_cap->eht_cap_elem);
+
+ /* Copy MCS/NSS which depends on the peer capabilities */
+ memset(&eht_cap->eht_mcs_nss_supp, 0,
+ sizeof(eht_cap->eht_mcs_nss_supp));
+ memcpy(&eht_cap->eht_mcs_nss_supp, pos, mcs_nss_size);
+
+ if (eht_ppe_size)
+ memcpy(eht_cap->eht_ppe_thres,
+ &eht_cap_ie_elem->optional[mcs_nss_size],
+ eht_ppe_size);
+
+ eht_cap->has_eht = true;
+
+ link_sta->cur_max_bandwidth = ieee80211_sta_cap_rx_bw(link_sta);
+ link_sta->pub->bandwidth = ieee80211_sta_cur_vht_bw(link_sta);
+}