/*
 * Copyright (c) Company 2018-2019. All rights reserved.
 * Description: define data struct about tcp segmentation offload
 */
#ifndef __ETH_TSO_H
#define __ETH_TSO_H

#define SG_FLAG		(1 << 30)
#define COE_FLAG	(1 << 29)
#define TSO_FLAG	(1 << 28)
#define VLAN_FLAG	(1 << 10)
#define IPV6_FLAG	(1 << 9)
#define UDP_FLAG	(1 << 8)

#define PKT_IPV6_HDR_LEN	10
#define PKT_UDP_HDR_LEN		2
#define WORD_TO_BYTE		4
enum {
	PKT_NORMAL,
	PKT_SG
};

enum {
	PKT_IPV4,
	PKT_IPV6
};

enum {
	PKT_TCP,
	PKT_UDP
};

struct frags_info {
	/* Word(2*i+2) */
	u32 addr;
	/* Word(2*i+3) */
	u32 size : 16;
	u32 reserved : 16;
};

struct sg_desc {
	/* Word0 */
	u32 total_len : 17;
	u32 reserv : 15;
	/* Word1 */
	u32 ipv6_id;
	/* Word2 */
	u32 linear_addr;
	/* Word3 */
	u32 linear_len : 16;
	u32 reserv3 : 16;
	struct frags_info frags[18]; /* MAX_SKB_FRAGS is 18 */
};

#endif