1 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/ion.h b/include/linux/ion.h
index a55d11fbcbd..31045a150dc 100644
--- a/include/linux/ion.h
+++ b/include/linux/ion.h
@@ -41,6 +41,21 @@ enum ion_heap_type {
         ION_NUM_HEAPS = 16,
 };
 
+/**
+ * enum ion_data_direction - sync operation arguments
+ * @ION_BIDIRECTIONAL:   memory written to & read from device
+ * @ION_TO_DEVICE: memory going to be transferred to device
+ * @ION_FROM_DEVICE:     memory populated by device
+ * @ION_NONE:            None of the above
+ */
+enum ion_data_direction {
+        ION_BIDIRECTIONAL = 0,
+        ION_TO_DEVICE = 1,
+        ION_FROM_DEVICE = 2,
+        ION_NONE = 3,
+};
+
+
 #define ION_HEAP_SYSTEM_MASK            (1 << ION_HEAP_TYPE_SYSTEM)
 #define ION_HEAP_SYSTEM_CONTIG_MASK     (1 << ION_HEAP_TYPE_SYSTEM_CONTIG)
 #define ION_HEAP_CARVEOUT_MASK          (1 << ION_HEAP_TYPE_CARVEOUT)
@@ -273,6 +288,7 @@ struct ion_allocation_data {
 struct ion_fd_data {
         struct ion_handle *handle;
         int fd;
+        enum ion_data_direction dir;
 };
 
 /**