v4.19.13 snapshot.
diff --git a/include/linux/dma-direction.h b/include/linux/dma-direction.h
new file mode 100644
index 0000000..9c96e30
--- /dev/null
+++ b/include/linux/dma-direction.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_DMA_DIRECTION_H
+#define _LINUX_DMA_DIRECTION_H
+
+enum dma_data_direction {
+	DMA_BIDIRECTIONAL = 0,
+	DMA_TO_DEVICE = 1,
+	DMA_FROM_DEVICE = 2,
+	DMA_NONE = 3,
+};
+
+#endif