/* * Copyright (c) 2004 Jeffrey M. Hsu. All rights reserved. * Copyright (c) 2004 The DragonFly Project. All rights reserved. * * This code is derived from software contributed to The DragonFly Project * by Jeffrey M. Hsu. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of The DragonFly Project nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific, prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Copyright (c) 1980, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)netisr.h 8.1 (Berkeley) 6/10/93 * $FreeBSD: src/sys/net/netisr.h,v 1.21.2.5 2002/02/09 23:02:39 luigi Exp $ */ #ifndef _NET_NETISR2_H_ #define _NET_NETISR2_H_ #ifndef _KERNEL #error "kernel only header file" #endif #include <sys/systm.h> #include <sys/msgport2.h> #include <sys/thread.h> #include <net/netisr.h> extern struct thread *netisr_threads[MAXCPU]; /* * Return the message port for the general protocol message servicing * thread for a particular cpu. */ static __inline lwkt_port_t netisr_cpuport(int cpu) { KKASSERT(cpu >= 0 && cpu < ncpus); return &netisr_threads[cpu]->td_msgport; } /* * Return the current cpu's network protocol thread. */ static __inline lwkt_port_t netisr_curport(void) { return netisr_cpuport(mycpuid); } /* * Return the LSB of the hash. */ static __inline uint32_t netisr_hashlsb(uint32_t hash) { return (hash & NETISR_CPUMASK); } /* * Return the cpu for the hash. */ static __inline int netisr_hashcpu(uint16_t hash) { return (netisr_hashlsb(hash) % netisr_ncpus); } /* * Return the message port for the general protocol message servicing * thread for the hash. */ static __inline lwkt_port_t netisr_hashport(uint16_t hash) { return netisr_cpuport(netisr_hashcpu(hash)); } #define IN_NETISR(n) \ (&curthread->td_msgport == netisr_cpuport((n))) #define IN_NETISR_NCPUS(n) \ ((n) < netisr_ncpus && IN_NETISR((n))) #define ASSERT_NETISR0 \ KASSERT(IN_NETISR(0), ("thread %p is not netisr0", curthread)) #define ASSERT_NETISR_NCPUS(n) \ KASSERT(IN_NETISR_NCPUS(n), \ ("thread %p cpu%d is not within netisr_ncpus %d", \ curthread, (n), netisr_ncpus)) static __inline int netisr_domsg_port(struct netmsg_base *nm, lwkt_port_t port) { #ifdef INVARIANTS /* * Only netisr0, netisrN itself, or non-netisr threads * can perform synchronous message sending to netisrN. */ KASSERT(curthread->td_type != TD_TYPE_NETISR || IN_NETISR(0) || port == &curthread->td_msgport, ("can't domsg to netisr port %p from thread %p", port, curthread)); #endif return (lwkt_domsg(port, &nm->lmsg, 0)); } static __inline int netisr_domsg(struct netmsg_base *nm, int cpu) { return (netisr_domsg_port(nm, netisr_cpuport(cpu))); } static __inline int netisr_domsg_global(struct netmsg_base *nm) { /* Start from netisr0. */ return (netisr_domsg(nm, 0)); } static __inline void netisr_sendmsg(struct netmsg_base *nm, int cpu) { lwkt_sendmsg(netisr_cpuport(cpu), &nm->lmsg); } static __inline void netisr_sendmsg_oncpu(struct netmsg_base *nm) { lwkt_sendmsg_oncpu(netisr_cpuport(mycpuid), &nm->lmsg); } static __inline void netisr_replymsg(struct netmsg_base *nm, int error) { lwkt_replymsg(&nm->lmsg, error); } static __inline void netisr_dropmsg(struct netmsg_base *nm) { lwkt_dropmsg(&nm->lmsg); } /* * To all netisrs, instead of netisr_ncpus. */ static __inline void netisr_forwardmsg_all(struct netmsg_base *nm, int next_cpu) { KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus); if (next_cpu < ncpus) lwkt_forwardmsg(netisr_cpuport(next_cpu), &nm->lmsg); else netisr_replymsg(nm, 0); } /* * To netisr_ncpus. */ static __inline void netisr_forwardmsg_error(struct netmsg_base *nm, int next_cpu, int error) { KKASSERT(next_cpu > mycpuid && next_cpu <= netisr_ncpus); if (next_cpu < netisr_ncpus) lwkt_forwardmsg(netisr_cpuport(next_cpu), &nm->lmsg); else netisr_replymsg(nm, error); } /* * To netisr_ncpus. */ static __inline void netisr_forwardmsg(struct netmsg_base *nm, int next_cpu) { netisr_forwardmsg_error(nm, next_cpu, 0); } #endif /* _NET_NETISR2_H_ */
