netisr.h revision 189344
1/*- 2 * Copyright (c) 1980, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)netisr.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: head/sys/net/netisr.h 189344 2009-03-04 02:54:11Z bms $ 31 */ 32 33#ifndef _NET_NETISR_H_ 34#define _NET_NETISR_H_ 35 36/* 37 * The netisr (network interrupt service routine) provides a deferred 38 * execution evironment in which (generally inbound) network processing can 39 * take place. Protocols register handlers and, optionally, packet queues; 40 * when packets are delivered to the queue, the protocol handler will be 41 * executed directly, or via deferred dispatch depending on the 42 * circumstances. 43 * 44 * Historically, this was implemented by the BSD software ISR facility; it is 45 * now implemented via a software ithread (SWI). 46 */ 47#define NETISR_POLL 0 /* polling callback, must be first */ 48#define NETISR_IP 2 /* same as AF_INET */ 49#define NETISR_IGMP 3 /* IGMPv3 output queue */ 50#define NETISR_ROUTE 14 /* routing socket */ 51#define NETISR_AARP 15 /* Appletalk ARP */ 52#define NETISR_ATALK2 16 /* Appletalk phase 2 */ 53#define NETISR_ATALK1 17 /* Appletalk phase 1 */ 54#define NETISR_ARP 18 /* same as AF_LINK */ 55#define NETISR_IPX 23 /* same as AF_IPX */ 56#define NETISR_USB 25 /* USB soft interrupt */ 57#define NETISR_PPP 26 /* PPP soft interrupt */ 58#define NETISR_IPV6 27 59#define NETISR_NATM 28 60#define NETISR_ATM 29 61#define NETISR_NETGRAPH 30 62#define NETISR_POLLMORE 31 /* polling callback, must be last */ 63 64#ifndef LOCORE 65#ifdef _KERNEL 66 67void legacy_setsoftnet(void); 68 69extern volatile unsigned int netisr; /* scheduling bits for network */ 70#define schednetisr(anisr) do { \ 71 atomic_set_rel_int(&netisr, 1 << (anisr)); \ 72 legacy_setsoftnet(); \ 73} while (0) 74/* used to atomically schedule multiple netisrs */ 75#define schednetisrbits(isrbits) do { \ 76 atomic_set_rel_int(&netisr, isrbits); \ 77 legacy_setsoftnet(); \ 78} while (0) 79 80struct ifqueue; 81struct mbuf; 82 83typedef void netisr_t (struct mbuf *); 84 85void netisr_dispatch(int, struct mbuf *); 86int netisr_queue(int, struct mbuf *); 87#define NETISR_FORCEQUEUE 0x0002 /* Force queued dispatch. */ 88void netisr_register(int, netisr_t *, struct ifqueue *, int); 89void netisr_unregister(int); 90 91#endif 92#endif 93 94#endif 95