Improve mailbox message handling
Introduce a 32b magic for each message. Verify the magic for
all incoming messages.
Add reset function - in case of protocol error, effectively
reset/empty the incoming queue.
Add an error message type and message
Add version request/response
Verify payload length of responses (when applicable)
Change-Id: I8aadd4012024492533d52e2cdb38630fce5c36e2
diff --git a/kernel/uapi/ethosu.h b/kernel/uapi/ethosu.h
index 8f870c9..0127033 100644
--- a/kernel/uapi/ethosu.h
+++ b/kernel/uapi/ethosu.h
@@ -39,6 +39,7 @@
#define ETHOSU_IOWR(nr, type) _IOWR(ETHOSU_IOCTL_BASE, nr, type)
#define ETHOSU_IOCTL_PING ETHOSU_IO(0x00)
+#define ETHOSU_IOCTL_VERSION_REQ ETHOSU_IO(0x01)
#define ETHOSU_IOCTL_BUFFER_CREATE ETHOSU_IOR(0x10, \
struct ethosu_uapi_buffer_create)
#define ETHOSU_IOCTL_BUFFER_SET ETHOSU_IOR(0x11, \