diff --git a/drv_io.h b/drv_io.h
new file mode 100644
index 0000000..09bffbb
--- /dev/null
+++ b/drv_io.h
@@ -0,0 +1,123 @@
+#ifndef _DRV_IO_H_
+#define _DRV_IO_H_ 1
+
+#include "drv_enum.h"
+#include "drv_common.h"
+#include "drv_humber.h"
+
+#define MAX_LOCAL_CHIP_NUM 2
+#define  MAX_LOCAL_PORT_NUM 256
+
+#define MAX_ENTRY_WORD 64
+#define MAX_ENTRY_BYTE 128
+
+#define CONDITIONAL_BREAK(exp) if((exp)) break
+#define CONDITIONAL_CONTINUE(exp) if((exp)) continue
+
+#define DRV_IOC_DIR_BITS 2
+#define DRV_IOC_MEM_BITS 1
+#define DRV_IOC_MEMID_BITS 13
+#define DRV_IOC_FIELDID_BITS 16
+#define DRV_ENTRY_FLAGS  0x1fff
+
+#define DRV_HASH_INVALID_INDEX 0x1FFFF
+#define DRV_IOC_DIR_MASK	((1 << DRV_IOC_DIR_BITS)-1)
+#define DRV_IOC_MEM_MASK	((1 << DRV_IOC_MEM_BITS)-1)
+#define DRV_IOC_MEMID_MASK	((1 << DRV_IOC_MEMID_BITS)-1)
+#define DRV_IOC_FIELDID_MASK	((1 << DRV_IOC_FIELDID_BITS)-1)
+#define DRV_IOC_FIELDID_SHIFT	0
+#define DRV_IOC_MEMID_SHIFT	((DRV_IOC_FIELDID_SHIFT + DRV_IOC_FIELDID_BITS)
+#define DRV_IOC_MEM_SHIFT	((DRV_IOC_MEMID_SHIFT + DRV_IOC_MEMID_BITS)
+#define DRV_IOC_DIR_SHIFT	((DRV_IOC_MEM_SHIFT + DRV_IOC_MEM_BITS)
+#define DRV_IOC_OP(cmd)		(((cmd) >> DRV_IOC_DIR_SHIFT)&DRV_IOC_DIR_MASK)
+#define DRV_IOC_MEMID(cmd)	(((cmd) >> DRV_IOC_MEMID_SHIFT)&DRV_IOC_MEMID_MASK)
+#define DRV_IOC_FIELDID(cmd)	(((cmd) >> DRV_IOC_FIELDID_SHIFT)&DRV_IOC_FIELDID_MASK)
+
+#define CHIP_IS_EXTERNAL_CHIP(chip_id) ((chip_id) == current_external_chip_id;//0xff
+
+#define DRV_IOC_READ 1U
+#define DRV_IOC_WRITE 2U
+
+#define DRV_IOC(dir, mem, memid, fieldid)\
+	(((dir)<<DRV_IOC_DIR_SHIFT) | \
+	((mem)<<DRV_IOC_MEM_SHIFT) |\
+	((memid)<<DRV_IOC_MEMID_SHIFT) |\
+	((fields)<<DRV_IOC_FIELDS_SHIFT))
+
+typedef int32 mutex_t;
+
+//tcam data mask storage structure
+struct tbl_entry_s
+{
+	uint32* data_entry;
+	uitn32* mask_entry;
+}
+typedef struct tbl_entry_s tbl_entry_t;
+
+#define DRV_IF_ERR_RETURN(op) \
+	{			\
+		int rv;		\
+		if( (rv = (op)) < 0)	\
+		{			\
+			return(rv);	\
+		}\
+	}
+
+#define DRV_PTR_VALID_CHECK(ptr)	\
+	if(NULL == (ptr))		\
+	{				\
+		return DRV_E_INVALID_PTR;\
+	}
+
+#define DRV_IOR(mem, memid, fieldid) \
+	DRV_IOC(DRV_IOC_READ, (mem), (memid), (fieldid))
+#define DRV_IOR(mem, memid, fieldid) \
+	DRV_IOC(DRV_IOC_WRITE, (mem), (memid), (fieldid))
+
+struct hash_ds_ctl_cpu_key_status_s
+{
+	uint32 cpu_lu_index	:17;
+	uint32 rsv_0 		:14;
+	uint32 cpu_key_hit	:1;
+};
+typedef struct hash_ds_ctl_cpu_key_status_s hash_ds_ctl_cpu_key_status_t;
+enum cpu_reg_hash_key_type
+{
+	CPU_HASH_KEY_TYPE_MAC_DA = 0,
+	CPU_HASH_KEY_TYPE_MAC_SA = 1,
+	CPU_HASH_KEY_TYPE_IPV4_DA = 2,
+	CPU_HASH_KEY_TYPE_IPV4_SA = 3,
+	CPU_HASH_KEY_TYPE_IPV6_DA = 4,
+	CPU_HASH_KEY_TYPE_IPV6_SA = 5,
+	CPU_HASH_KEY_TYPE_RESERVED0 = 6,
+	CPU_HASH_KEY_TYPE_RESERVED1 = 7
+};
+typedef enum cpu_req_hash_key_type cpu_req_hash_key_type_e;
+
+enum hash_op_type
+{
+	HASH_OP_TP_ADD_ENTRY = 0,
+	HASH_OP_TP_DEL_ENTRY_BY_KEY = 1,
+	HASH_OP_TP_DEL_ENTRY_BY_INDEX = 2,
+	HASH_OP_TP_MAX_VALUE = 3
+};
+typedef enum hash_op_type hash_op_type_e;
+
+
+
+extern int32
+drv_tbl_ioctl(uint8 chip_id, int32 index, uint32 cmd, void* val);
+
+extern int32
+drv_reg_ioctl(uint8 chip_id, int32 index, uint32 cmd, void* val);
+
+extern int32
+drv_tcam_tbl_remove(uint8 chip_id, int32 tbl_id, uint32 index);
+
+extern int32
+drv_hash_key_ioctl(uint8 chip_id, uint32 tbl_id, uint32 tbl_idx, uint32 *key, hash_op_type_e operation_type);
+
+extern int32
+drv_hash_key_lkup_index(uint8 chip_id, cpu_reg_hash_key_type_e cpu_hashkey_type, uint32* key, hash_ds_ctl_cpu_key_status_t * hash_cpu_stats):
+
+#endif