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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _TSO_H
#define _TSO_H
#include <linux/skbuff.h>
#include <net/ip.h>
#define TSO_HEADER_SIZE 256
struct tso_t {
int next_frag_idx;
int size;
void *data;
u16 ip_id;
u8 tlen; /* transport header len */
bool ipv6;
u32 tcp_seq;
};
/* Calculate the worst case buffer count */
static inline int tso_count_descs(const struct sk_buff *skb)
{
return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
}
void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
int size, bool is_last);
void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size);
int tso_start(struct sk_buff *skb, struct tso_t *tso);
#endif /* _TSO_H */