Index: abi/include/abi/ipc/ipc.h
===================================================================
--- abi/include/abi/ipc/ipc.h	(revision 850235d404a93a3e011befe27ef139ef8e288759)
+++ abi/include/abi/ipc/ipc.h	(revision fa24efa71b4a16342f94d5f63ee75d9242a727c6)
@@ -59,4 +59,10 @@
 /** Interrupt notification */
 #define IPC_CALL_NOTIF  (1 << 3)
+
+/**
+ * Maximum buffer size allowed for IPC_M_DATA_WRITE and
+ * IPC_M_DATA_READ requests.
+ */
+#define DATA_XFER_LIMIT  (64 * 1024)