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net: tso: inline tso_count_descs()

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tso_count_descs() is a small function doing simple calculation,
and tso_count_descs() is used in fast path, so inline it to
reduce the overhead of calls.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Link: https://lore.kernel.org/r/20221212032426.16050-1-linyunsheng@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yunsheng Lin 2022-12-12 11:24:26 +08:00 committed by Jakub Kicinski
parent 8f18655c49
commit d7b061b80e
2 changed files with 7 additions and 9 deletions
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8
include/net/tso.h
View File

@ -2,6 +2,7 @@
#ifndef _TSO_H #ifndef _TSO_H
#define _TSO_H #define _TSO_H
#include <linux/skbuff.h>
#include <net/ip.h> #include <net/ip.h>
#define TSO_HEADER_SIZE 256 #define TSO_HEADER_SIZE 256
@ -16,7 +17,12 @@ struct tso_t {
u32 tcp_seq; u32 tcp_seq;
}; };
int tso_count_descs(const struct sk_buff *skb); /* 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, void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
int size, bool is_last); int size, bool is_last);
void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size); void tso_build_data(const struct sk_buff *skb, struct tso_t *tso, int size);

8
net/core/tso.c
View File

@ -5,14 +5,6 @@
#include <net/tso.h> #include <net/tso.h>
#include <asm/unaligned.h> #include <asm/unaligned.h>
/* Calculate expected number of TX descriptors */
int tso_count_descs(const struct sk_buff *skb)
{
/* The Marvell Way */
return skb_shinfo(skb)->gso_segs * 2 + skb_shinfo(skb)->nr_frags;
}
EXPORT_SYMBOL(tso_count_descs);
void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso, void tso_build_hdr(const struct sk_buff *skb, char *hdr, struct tso_t *tso,
int size, bool is_last) int size, bool is_last)
{ {