[linux-block.git] / include / net / tso.h

/* 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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e876f208 EG	2	#ifndef _TSO_H
	3	#define _TSO_H
	4
d7b061b8	5	#include <linux/skbuff.h>
e876f208 EG	6	#include <net/ip.h>
e876f208 EG	7
9c77b803	8	#define TSO_HEADER_SIZE 256
f9cbe9a5	9
e876f208	10	struct tso_t {
185c3e58 ED	11	int next_frag_idx;
	12	int size;
	13	void *data;
	14	u16 ip_id;
761b331c	15	u8 tlen; /* transport header len */
185c3e58 ED	16	bool ipv6;
185c3e58 ED	17	u32 tcp_seq;
e876f208 EG	18	};
e876f208 EG	19
d7b061b8 YL	20	/* Calculate the worst case buffer count */
	21	static inline int tso_count_descs(const struct sk_buff *skb)
	22	{
	23	return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
	24	}
	25
504b9121	26	void tso_build_hdr(const struct sk_buff skb, char hdr, struct tso_t *tso,
e876f208	27	int size, bool is_last);
504b9121	28	void tso_build_data(const struct sk_buff skb, struct tso_t tso, int size);
761b331c	29	int tso_start(struct sk_buff skb, struct tso_t tso);
e876f208 EG	30
e876f208 EG	31	#endif /* _TSO_H */