/* * net busy poll support * Copyright(c) 2013 Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * * Author: Eliezer Tamir * * Contact Information: * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> */ #ifndef _LINUX_NET_BUSY_POLL_H #define _LINUX_NET_BUSY_POLL_H #include <linux/netdevice.h> #include <linux/sched/clock.h> #include <linux/sched/signal.h> #include <net/ip.h> /* 0 - Reserved to indicate value not set * 1..NR_CPUS - Reserved for sender_cpu * NR_CPUS+1..~0 - Region available for NAPI IDs */ #define MIN_NAPI_ID ((unsigned int)(NR_CPUS + 1)) #ifdef CONFIG_NET_RX_BUSY_POLL struct napi_struct; extern unsigned int sysctl_net_busy_read __read_mostly; extern unsigned int sysctl_net_busy_poll __read_mostly; static inline bool net_busy_loop_on(void) { return sysctl_net_busy_poll; } static inline bool sk_can_busy_loop(const struct sock *sk) { return READ_ONCE(sk->sk_ll_usec) && !signal_pending(current); } bool sk_busy_loop_end(void *p, unsigned long start_time); void napi_busy_loop(unsigned int napi_id, bool (*loop_end)(void *, unsigned long), void *loop_end_arg); #else /* CONFIG_NET_RX_BUSY_POLL */ static inline unsigned long net_busy_loop_on(void) { return 0; } static inline bool sk_can_busy_loop(struct sock *sk) { return false; } #endif /* CONFIG_NET_RX_BUSY_POLL */ 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 } /* in poll/select we use the global sysctl_net_ll_poll value */ static inline bool busy_loop_timeout(unsigned long start_time) { #ifdef CONFIG_NET_RX_BUSY_POLL unsigned long bp_usec = READ_ONCE(sysctl_net_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; } 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); 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; } static inline void sk_busy_loop(struct sock *sk, int nonblock) { #ifdef CONFIG_NET_RX_BUSY_POLL unsigned int napi_id = READ_ONCE(sk->sk_napi_id); if (napi_id >= MIN_NAPI_ID) napi_busy_loop(napi_id, nonblock ? NULL : sk_busy_loop_end, sk); #endif } /* used in the NIC receive handler to mark the skb */ static inline void skb_mark_napi_id(struct sk_buff *skb, struct napi_struct *napi) { #ifdef CONFIG_NET_RX_BUSY_POLL skb->napi_id = napi->napi_id; #endif } /* used in the protocol hanlder to propagate the napi_id to the socket */ static inline void sk_mark_napi_id(struct sock *sk, const struct sk_buff *skb) { #ifdef CONFIG_NET_RX_BUSY_POLL WRITE_ONCE(sk->sk_napi_id, skb->napi_id); #endif } /* variant used for unconnected sockets */ static inline void sk_mark_napi_id_once(struct sock *sk, const struct sk_buff *skb) { #ifdef CONFIG_NET_RX_BUSY_POLL if (!READ_ONCE(sk->sk_napi_id)) WRITE_ONCE(sk->sk_napi_id, skb->napi_id); #endif } #endif /* _LINUX_NET_BUSY_POLL_H */
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9p | Folder | 0755 |
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bluetooth | Folder | 0755 |
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caif | Folder | 0755 |
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iucv | Folder | 0755 |
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netfilter | Folder | 0755 |
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netns | Folder | 0755 |
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nfc | Folder | 0755 |
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phonet | Folder | 0755 |
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sctp | Folder | 0755 |
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tc_act | Folder | 0755 |
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6lowpan.h | File | 10.03 KB | 0644 |
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Space.h | File | 1.15 KB | 0644 |
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act_api.h | File | 6.38 KB | 0644 |
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addrconf.h | File | 12.63 KB | 0644 |
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af_ieee802154.h | File | 1.55 KB | 0644 |
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af_rxrpc.h | File | 2.79 KB | 0644 |
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af_unix.h | File | 2.22 KB | 0644 |
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af_vsock.h | File | 7.21 KB | 0644 |
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arp.h | File | 2 KB | 0644 |
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atmclip.h | File | 1.48 KB | 0644 |
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ax25.h | File | 15.02 KB | 0644 |
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ax88796.h | File | 998 B | 0644 |
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bond_3ad.h | File | 9.79 KB | 0644 |
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bond_alb.h | File | 6.6 KB | 0644 |
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bond_options.h | File | 3.92 KB | 0644 |
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bonding.h | File | 19.1 KB | 0644 |
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busy_poll.h | File | 3.8 KB | 0644 |
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calipso.h | File | 2.15 KB | 0644 |
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cfg80211-wext.h | File | 1.95 KB | 0644 |
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cfg80211.h | File | 221.24 KB | 0644 |
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cfg802154.h | File | 10.89 KB | 0644 |
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checksum.h | File | 4.76 KB | 0644 |
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cipso_ipv4.h | File | 8.2 KB | 0644 |
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cls_cgroup.h | File | 2.15 KB | 0644 |
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codel.h | File | 5.65 KB | 0644 |
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codel_impl.h | File | 7.98 KB | 0644 |
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codel_qdisc.h | File | 2.9 KB | 0644 |
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compat.h | File | 2.11 KB | 0644 |
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datalink.h | File | 619 B | 0644 |
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dcbevent.h | File | 1.26 KB | 0644 |
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dcbnl.h | File | 4.2 KB | 0644 |
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devlink.h | File | 13.25 KB | 0644 |
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dn.h | File | 6.88 KB | 0644 |
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dn_dev.h | File | 5.36 KB | 0644 |
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dn_fib.h | File | 3.98 KB | 0644 |
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dn_neigh.h | File | 968 B | 0644 |
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dn_nsp.h | File | 5.83 KB | 0644 |
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dn_route.h | File | 4.36 KB | 0644 |
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dsa.h | File | 13.94 KB | 0644 |
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dsfield.h | File | 1.11 KB | 0644 |
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dst.h | File | 13.48 KB | 0644 |
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dst_cache.h | File | 2.53 KB | 0644 |
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dst_metadata.h | File | 5.39 KB | 0644 |
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dst_ops.h | File | 2 KB | 0644 |
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erspan.h | File | 2.11 KB | 0644 |
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esp.h | File | 877 B | 0644 |
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ethoc.h | File | 538 B | 0644 |
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fib_notifier.h | File | 1.29 KB | 0644 |
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fib_rules.h | File | 4.18 KB | 0644 |
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firewire.h | File | 636 B | 0644 |
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flow.h | File | 6.16 KB | 0644 |
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flow_dissector.h | File | 7.55 KB | 0644 |
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fq.h | File | 2.67 KB | 0644 |
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fq_impl.h | File | 6.9 KB | 0644 |
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garp.h | File | 2.62 KB | 0644 |
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gen_stats.h | File | 2.34 KB | 0644 |
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genetlink.h | File | 11.3 KB | 0644 |
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gro_cells.h | File | 443 B | 0644 |
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gue.h | File | 3.23 KB | 0644 |
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hwbm.h | File | 937 B | 0644 |
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icmp.h | File | 2.01 KB | 0644 |
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ieee80211_radiotap.h | File | 6.63 KB | 0644 |
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ieee802154_netdev.h | File | 9.14 KB | 0644 |
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if_inet6.h | File | 6.13 KB | 0644 |
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ife.h | File | 1.06 KB | 0644 |
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ila.h | File | 498 B | 0644 |
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inet6_connection_sock.h | File | 976 B | 0644 |
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inet6_hashtables.h | File | 3.7 KB | 0644 |
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inet_common.h | File | 1.89 KB | 0644 |
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inet_connection_sock.h | File | 10.48 KB | 0644 |
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inet_frag.h | File | 4.51 KB | 0644 |
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inet_hashtables.h | File | 12.91 KB | 0644 |
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inet_sock.h | File | 8.25 KB | 0644 |
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inet_timewait_sock.h | File | 3.82 KB | 0644 |
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inetpeer.h | File | 3.29 KB | 0644 |
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ip.h | File | 18.51 KB | 0644 |
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ip6_checksum.h | File | 2.89 KB | 0644 |
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ip6_fib.h | File | 10.04 KB | 0644 |
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ip6_route.h | File | 7.63 KB | 0644 |
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ip6_tunnel.h | File | 4.72 KB | 0644 |
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ip_fib.h | File | 10.72 KB | 0644 |
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ip_tunnels.h | File | 13.61 KB | 0644 |
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ip_vs.h | File | 46.78 KB | 0644 |
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ipcomp.h | File | 659 B | 0644 |
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ipconfig.h | File | 811 B | 0644 |
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ipv6.h | File | 29.97 KB | 0644 |
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ipv6_frag.h | File | 2.54 KB | 0644 |
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ipx.h | File | 4.4 KB | 0644 |
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iw_handler.h | File | 20.91 KB | 0644 |
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kcm.h | File | 4.96 KB | 0644 |
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l3mdev.h | File | 5.86 KB | 0644 |
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lapb.h | File | 4.75 KB | 0644 |
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lib80211.h | File | 3.92 KB | 0644 |
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llc.h | File | 4.41 KB | 0644 |
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llc_c_ac.h | File | 9.31 KB | 0644 |
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llc_c_ev.h | File | 10.68 KB | 0644 |
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llc_c_st.h | File | 1.72 KB | 0644 |
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llc_conn.h | File | 4.06 KB | 0644 |
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llc_if.h | File | 2.16 KB | 0644 |
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llc_pdu.h | File | 14.44 KB | 0644 |
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llc_s_ac.h | File | 1.55 KB | 0644 |
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llc_s_ev.h | File | 2.2 KB | 0644 |
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llc_s_st.h | File | 947 B | 0644 |
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llc_sap.h | File | 1.08 KB | 0644 |
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lwtunnel.h | File | 5.84 KB | 0644 |
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mac80211.h | File | 230.36 KB | 0644 |
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mac802154.h | File | 15.27 KB | 0644 |
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mip6.h | File | 1.58 KB | 0644 |
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mld.h | File | 2.8 KB | 0644 |
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mpls.h | File | 932 B | 0644 |
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mpls_iptunnel.h | File | 827 B | 0644 |
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mrp.h | File | 3.03 KB | 0644 |
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ncsi.h | File | 1.92 KB | 0644 |
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ndisc.h | File | 13.77 KB | 0644 |
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neighbour.h | File | 15.06 KB | 0644 |
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net_namespace.h | File | 10.08 KB | 0644 |
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net_ratelimit.h | File | 220 B | 0644 |
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netevent.h | File | 910 B | 0644 |
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netlabel.h | File | 20.74 KB | 0644 |
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netlink.h | File | 40.39 KB | 0644 |
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netprio_cgroup.h | File | 1.24 KB | 0644 |
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netrom.h | File | 7.68 KB | 0644 |
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nexthop.h | File | 865 B | 0644 |
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nl802154.h | File | 12.09 KB | 0644 |
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nsh.h | File | 12.31 KB | 0644 |
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p8022.h | File | 447 B | 0644 |
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ping.h | File | 3.45 KB | 0644 |
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pkt_cls.h | File | 17.34 KB | 0644 |
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pkt_sched.h | File | 4.05 KB | 0644 |
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pptp.h | File | 557 B | 0644 |
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protocol.h | File | 4.08 KB | 0644 |
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psample.h | File | 860 B | 0644 |
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psnap.h | File | 351 B | 0644 |
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raw.h | File | 2.07 KB | 0644 |
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rawv6.h | File | 854 B | 0644 |
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red.h | File | 10.45 KB | 0644 |
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regulatory.h | File | 10.12 KB | 0644 |
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request_sock.h | File | 6.46 KB | 0644 |
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rose.h | File | 7.62 KB | 0644 |
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route.h | File | 10.02 KB | 0644 |
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rtnetlink.h | File | 6.13 KB | 0644 |
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sch_generic.h | File | 23.3 KB | 0644 |
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scm.h | File | 3.5 KB | 0644 |
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secure_seq.h | File | 855 B | 0644 |
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seg6.h | File | 1.66 KB | 0644 |
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seg6_hmac.h | File | 1.65 KB | 0644 |
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slhc_vj.h | File | 6.67 KB | 0644 |
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smc.h | File | 440 B | 0644 |
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snmp.h | File | 5.23 KB | 0644 |
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sock.h | File | 69.75 KB | 0644 |
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sock_reuseport.h | File | 863 B | 0644 |
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stp.h | File | 383 B | 0644 |
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strparser.h | File | 3.75 KB | 0644 |
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switchdev.h | File | 6.52 KB | 0644 |
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tcp.h | File | 62.8 KB | 0644 |
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tcp_states.h | File | 1.26 KB | 0644 |
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timewait_sock.h | File | 1.11 KB | 0644 |
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tipc.h | File | 2.34 KB | 0644 |
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tls.h | File | 7.12 KB | 0644 |
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transp_v6.h | File | 2.08 KB | 0644 |
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tso.h | File | 515 B | 0644 |
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tun_proto.h | File | 988 B | 0644 |
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udp.h | File | 12.82 KB | 0644 |
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udp_tunnel.h | File | 5.12 KB | 0644 |
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udplite.h | File | 3.83 KB | 0644 |
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vsock_addr.h | File | 1.05 KB | 0644 |
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vxlan.h | File | 10.43 KB | 0644 |
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wext.h | File | 1.51 KB | 0644 |
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wimax.h | File | 19.97 KB | 0644 |
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x25.h | File | 9.43 KB | 0644 |
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x25device.h | File | 387 B | 0644 |
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xfrm.h | File | 53.72 KB | 0644 |
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