1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
index 9877988db0d2..2964c5fb11e9 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c
@@ -388,4 +388,54 @@ void iwl_uefi_get_sgom_table(struct iwl_trans *trans,
 	kfree(data);
 }
 IWL_EXPORT_SYMBOL(iwl_uefi_get_sgom_table);
+
+static int iwl_uefi_uats_parse(struct uefi_cnv_wlan_uats_data *uats_data,
+			       struct iwl_fw_runtime *fwrt)
+{
+	if (uats_data->revision != 1)
+		return -EINVAL;
+
+	memcpy(fwrt->uats_table.offset_map, uats_data->offset_map,
+	       sizeof(fwrt->uats_table.offset_map));
+	return 0;
+}
+
+int iwl_uefi_get_uats_table(struct iwl_trans *trans,
+			    struct iwl_fw_runtime *fwrt)
+{
+	struct uefi_cnv_wlan_uats_data *data;
+	unsigned long package_size;
+	int ret;
+
+	data = iwl_uefi_get_variable(IWL_UEFI_UATS_NAME, &IWL_EFI_VAR_GUID,
+				     &package_size);
+	if (IS_ERR(data)) {
+		IWL_DEBUG_FW(trans,
+			     "UATS UEFI variable not found 0x%lx\n",
+			     PTR_ERR(data));
+		return -EINVAL;
+	}
+
+	if (package_size < sizeof(*data)) {
+		IWL_DEBUG_FW(trans,
+			     "Invalid UATS table UEFI variable len (%lu)\n",
+			     package_size);
+		kfree(data);
+		return -EINVAL;
+	}
+
+	IWL_DEBUG_FW(trans, "Read UATS from UEFI with size %lu\n",
+		     package_size);
+
+	ret = iwl_uefi_uats_parse(data, fwrt);
+	if (ret < 0) {
+		IWL_DEBUG_FW(trans, "Cannot read UATS table. rev is invalid\n");
+		kfree(data);
+		return ret;
+	}
+
+	kfree(data);
+	return 0;
+}
+IWL_EXPORT_SYMBOL(iwl_uefi_get_uats_table);
 #endif /* CONFIG_ACPI */