iwlwifi: mvm: add WFA vendor specific TPC report IE to probe request

Add the WFA vendor specific TPC report IE to probe requests
when it is not added by the FW. The FW will still need to set
the tx power field.
Signed-off-by: NAvraham Stern <avraham.stern@intel.com>
Signed-off-by: NLuca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/scan.c

@@ -664,6 +664,22 @@ static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 	return newpos;
 }
 
+#define WFA_TPC_IE_LEN	9
+
+static void iwl_mvm_add_tpc_report_ie(u8 *pos)
+{
+	pos[0] = WLAN_EID_VENDOR_SPECIFIC;
+	pos[1] = WFA_TPC_IE_LEN - 2;
+	pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
+	pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
+	pos[4] = WLAN_OUI_MICROSOFT & 0xff;
+	pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
+	pos[6] = 0;
+	/* pos[7] - tx power will be inserted by the FW */
+	pos[7] = 0;
+	pos[8] = 0;
+}
+
 static void
 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 			 struct ieee80211_scan_ies *ies,
@@ -716,7 +732,16 @@ iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 
 	memcpy(pos, ies->common_ies, ies->common_ie_len);
 	params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
-	params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
+
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    !fw_has_capa(&mvm->fw->ucode_capa,
+			 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
+		iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
+		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
+							   WFA_TPC_IE_LEN);
+	} else {
+		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
+	}
 }
 
 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
@@ -781,7 +806,9 @@ static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 	if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 		flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 
-	if (iwl_mvm_rrm_scan_needed(mvm))
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 		flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 
 	if (params->pass_all)
@@ -1183,7 +1210,9 @@ static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
 	}
 
-	if (iwl_mvm_rrm_scan_needed(mvm))
+	if (iwl_mvm_rrm_scan_needed(mvm) &&
+	    fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
 
 	if (params->pass_all)