diff options
Diffstat (limited to 'include/net/busy_poll.h')
-rw-r--r-- | include/net/busy_poll.h | 68 |
1 files changed, 38 insertions, 30 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h index c55760f4820f..72c82f2ea536 100644 --- a/include/net/busy_poll.h +++ b/include/net/busy_poll.h @@ -46,62 +46,70 @@ static inline bool net_busy_loop_on(void) return sysctl_net_busy_poll; } -static inline u64 busy_loop_us_clock(void) +static inline bool sk_can_busy_loop(const struct sock *sk) { - return local_clock() >> 10; + return sk->sk_ll_usec && !signal_pending(current); } -static inline unsigned long sk_busy_loop_end_time(struct sock *sk) -{ - return busy_loop_us_clock() + ACCESS_ONCE(sk->sk_ll_usec); -} +void sk_busy_loop(struct sock *sk, int nonblock); -/* in poll/select we use the global sysctl_net_ll_poll value */ -static inline unsigned long busy_loop_end_time(void) +#else /* CONFIG_NET_RX_BUSY_POLL */ +static inline unsigned long net_busy_loop_on(void) { - return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_busy_poll); + return 0; } -static inline bool sk_can_busy_loop(const struct sock *sk) +static inline bool sk_can_busy_loop(struct sock *sk) { - return sk->sk_ll_usec && !signal_pending(current); + return false; } -static inline bool busy_loop_timeout(unsigned long end_time) +static inline void sk_busy_loop(struct sock *sk, int nonblock) { - unsigned long now = busy_loop_us_clock(); - - return time_after(now, end_time); } -void sk_busy_loop(struct sock *sk, int nonblock); +#endif /* CONFIG_NET_RX_BUSY_POLL */ -#else /* CONFIG_NET_RX_BUSY_POLL */ -static inline unsigned long net_busy_loop_on(void) +static inline unsigned long busy_loop_current_time(void) { +#ifdef CONFIG_NET_RX_BUSY_POLL + return (unsigned long)(local_clock() >> 10); +#else return 0; +#endif } -static inline unsigned long busy_loop_end_time(void) +/* in poll/select we use the global sysctl_net_ll_poll value */ +static inline bool busy_loop_timeout(unsigned long start_time) { - return 0; -} +#ifdef CONFIG_NET_RX_BUSY_POLL + unsigned long bp_usec = READ_ONCE(sysctl_net_busy_poll); -static inline bool sk_can_busy_loop(struct sock *sk) -{ - return false; -} + if (bp_usec) { + unsigned long end_time = start_time + bp_usec; + unsigned long now = busy_loop_current_time(); -static inline bool busy_loop_timeout(unsigned long end_time) -{ + return time_after(now, end_time); + } +#endif return true; } -static inline void sk_busy_loop(struct sock *sk, int nonblock) +static inline bool sk_busy_loop_timeout(struct sock *sk, + unsigned long start_time) { -} +#ifdef CONFIG_NET_RX_BUSY_POLL + unsigned long bp_usec = READ_ONCE(sk->sk_ll_usec); -#endif /* CONFIG_NET_RX_BUSY_POLL */ + if (bp_usec) { + unsigned long end_time = start_time + bp_usec; + unsigned long now = busy_loop_current_time(); + + return time_after(now, end_time); + } +#endif + return true; +} /* used in the NIC receive handler to mark the skb */ static inline void skb_mark_napi_id(struct sk_buff *skb, |