netisr.h revision 175018 
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 175018 2007-12-31 20:58:50Z rwatson $
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_ROUTE	14		/* routing socket */
50#define	NETISR_AARP	15		/* Appletalk ARP */
51#define	NETISR_ATALK2	16		/* Appletalk phase 2 */
52#define	NETISR_ATALK1	17		/* Appletalk phase 1 */
53#define	NETISR_ARP	18		/* same as AF_LINK */
54#define	NETISR_IPX	23		/* same as AF_IPX */
55#define	NETISR_USB	25		/* USB soft interrupt */
56#define	NETISR_PPP	26		/* PPP soft interrupt */
57#define	NETISR_IPV6	27
58#define	NETISR_NATM	28
59#define	NETISR_ATM	29
60#define	NETISR_NETGRAPH	30
61#define	NETISR_POLLMORE	31		/* polling callback, must be last */
62
63#ifndef LOCORE
64#ifdef _KERNEL
65
66void legacy_setsoftnet(void);
67
68extern volatile unsigned int	netisr;	/* scheduling bits for network */
69#define	schednetisr(anisr) do {						\
70	atomic_set_rel_int(&netisr, 1 << (anisr));			\
71	legacy_setsoftnet();						\
72} while (0)
73/* used to atomically schedule multiple netisrs */
74#define	schednetisrbits(isrbits) do {					\
75	atomic_set_rel_int(&netisr, isrbits);				\
76	legacy_setsoftnet();						\
77} while (0)
78
79struct ifqueue;
80struct mbuf;
81
82typedef void netisr_t (struct mbuf *);
83
84void	netisr_dispatch(int, struct mbuf *);
85int	netisr_queue(int, struct mbuf *);
86#define	NETISR_MPSAFE	0x0001		/* ISR does not need Giant */
87void	netisr_register(int, netisr_t *, struct ifqueue *, int);
88void	netisr_unregister(int);
89
90#endif
91#endif
92
93#endif
94