@@ -5006,6 +5006,104 @@ static u8 ieee80211_max_rx_chains(struct ieee80211_sub_if_data *sdata,
return chains;
}
+static bool
+ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata,
+ const struct cfg80211_bss_ies *ies,
+ const struct ieee80211_he_operation *he_op)
+{
+ const struct element *he_cap_elem;
+ const struct ieee80211_he_cap_elem *he_cap;
+ struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp;
+ u16 mcs_80_map_tx, mcs_80_map_rx;
+ u16 ap_min_req_set;
+ int mcs_nss_size;
+ int nss;
+
+ he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY,
+ ies->data, ies->len);
+
+ /* invalid HE IE */
+ if (!he_cap_elem || he_cap_elem->datalen < 1 + sizeof(*he_cap)) {
+ sdata_info(sdata,
+ "Invalid HE elem, Disable HE\n");
+ return false;
+ }
+
+ /* skip one byte ext_tag_id */
+ he_cap = (void *)(he_cap_elem->data + 1);
+ mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap);
+
+ /* invalid HE IE */
+ if (he_cap_elem->datalen < 1 + sizeof(*he_cap) + mcs_nss_size) {
+ sdata_info(sdata,
+ "Invalid HE elem with nss size, Disable HE\n");
+ return false;
+ }
+
+ /* mcs_nss is right after he_cap info */
+ he_mcs_nss_supp = (void *)(he_cap + 1);
+
+ mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80);
+ mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80);
+
+ /* P802.11-REVme/D0.3
+ * 27.1.1 Introduction to the HE PHY
+ * ...
+ * An HE STA shall support the following features:
+ * ...
+ * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all
+ * supported channel widths for HE SU PPDUs
+ */
+ if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+ (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) {
+ sdata_info(sdata,
+ "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n",
+ mcs_80_map_tx, mcs_80_map_rx);
+ return false;
+ }
+
+ if (!he_op)
+ return true;
+
+ ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set);
+
+ /* make sure the AP is consistent with itself
+ *
+ * P802.11-REVme/D0.3
+ * 26.17.1 Basic HE BSS operation
+ *
+ * A STA that is operating in an HE BSS shall be able to receive and
+ * transmit at each of the <HE-MCS, NSS> tuple values indicated by the
+ * Basic HE-MCS And NSS Set field of the HE Operation parameter of the
+ * MLME-START.request primitive and shall be able to receive at each of
+ * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and
+ * NSS Set field in the HE Capabilities parameter of the MLMESTART.request
+ * primitive
+ */
+ for (nss = 8; nss > 0; nss--) {
+ u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3;
+ u8 ap_rx_val;
+ u8 ap_tx_val;
+
+ if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED)
+ continue;
+
+ ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3;
+ ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3;
+
+ if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+ ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED ||
+ ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) {
+ sdata_info(sdata,
+ "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n",
+ nss, ap_rx_val, ap_rx_val, ap_op_val);
+ return false;
+ }
+ }
+
+ return true;
+}
+
static bool
ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata,
struct ieee80211_supported_band *sband,
@@ -5191,7 +5289,8 @@ static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
}
}
- if (!ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
+ if (!ieee80211_verify_peer_he_mcs_support(sdata, ies, he_oper) ||
+ !ieee80211_verify_sta_he_mcs_support(sdata, sband, he_oper))
ifmgd->flags |= IEEE80211_STA_DISABLE_HE;
}