diff --git a/kernel/uapi/ethosu.h b/kernel/uapi/ethosu.h
index 69f8d3a..4e4d180 100644
--- a/kernel/uapi/ethosu.h
+++ b/kernel/uapi/ethosu.h
@@ -49,10 +49,6 @@
 						   struct ethosu_uapi_kernel_driver_version)
 #define ETHOSU_IOCTL_BUFFER_CREATE      ETHOSU_IOR(0x10, \
 						   struct ethosu_uapi_buffer_create)
-#define ETHOSU_IOCTL_BUFFER_SET         ETHOSU_IOR(0x11, \
-						   struct ethosu_uapi_buffer)
-#define ETHOSU_IOCTL_BUFFER_GET         ETHOSU_IOW(0x12, \
-						   struct ethosu_uapi_buffer)
 #define ETHOSU_IOCTL_NETWORK_CREATE     ETHOSU_IOR(0x20, \
 						   struct ethosu_uapi_network_create)
 #define ETHOSU_IOCTL_NETWORK_INFO       ETHOSU_IOR(0x21, \
@@ -71,7 +67,7 @@
 #define ETHOSU_PMU_EVENT_MAX             8
 
 /* Kernel driver version */
-#define ETHOSU_KERNEL_DRIVER_VERSION_MAJOR 1
+#define ETHOSU_KERNEL_DRIVER_VERSION_MAJOR 2
 #define ETHOSU_KERNEL_DRIVER_VERSION_MINOR 0
 #define ETHOSU_KERNEL_DRIVER_VERSION_PATCH 0
 
@@ -105,21 +101,9 @@
 
 /**
  * struct ethosu_uapi_buffer_create - Create buffer request
- * @capacity:	Maximum capacity of the buffer
+ * @size:	Size of the requested buffer
  */
 struct ethosu_uapi_buffer_create {
-	__u32 capacity;
-};
-
-/**
- * struct ethosu_uapi_buffer - Buffer descriptor
- * @offset:	Offset to where the data starts
- * @size:	Size of the data
- *
- * 'offset + size' must not exceed the capacity of the buffer.
- */
-struct ethosu_uapi_buffer {
-	__u32 offset;
 	__u32 size;
 };