dma: add streaming DMA ops

This will allow us to implement cache maintenance in a platform
agnostic way.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/dma-dir.h b/include/dma-dir.h
new file mode 100644
index 0000000000..ba107f10ce
--- /dev/null
+++ b/include/dma-dir.h
@@ -0,0 +1,6 @@
+enum dma_data_direction {
+	DMA_BIDIRECTIONAL = 0,
+	DMA_TO_DEVICE = 1,
+	DMA_FROM_DEVICE = 2,
+	DMA_NONE = 3,
+};