netisr.h revision 139823 
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 139823 2005-01-07 01:45:51Z imp $
31 */
32
33#ifndef _NET_NETISR_H_
34#define _NET_NETISR_H_
35
36/*
37 * The networking code runs off software interrupts.
38 *
39 * You can switch into the network by doing splnet() and return by splx().
40 * The software interrupt level for the network is higher than the software
41 * level for the clock (so you can enter the network in routines called
42 * at timeout time).
43 */
44
45/*
46 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
47 * word which is used to de-multiplex a single software
48 * interrupt used for scheduling the network code to calls
49 * on the lowest level routine of each protocol.
50 */
51#define	NETISR_POLL	0		/* polling callback, must be first */
52#define	NETISR_IP	2		/* same as AF_INET */
53#define	NETISR_ROUTE	14		/* routing socket */
54#define	NETISR_AARP	15		/* Appletalk ARP */
55#define	NETISR_ATALK2	16		/* Appletalk phase 2 */
56#define	NETISR_ATALK1	17		/* Appletalk phase 1 */
57#define	NETISR_ARP	18		/* same as AF_LINK */
58#define	NETISR_IPX	23		/* same as AF_IPX */
59#define	NETISR_USB	25		/* USB soft interrupt */
60#define	NETISR_PPP	26		/* PPP soft interrupt */
61#define	NETISR_IPV6	27
62#define	NETISR_NATM	28
63#define	NETISR_ATM	29
64#define	NETISR_NETGRAPH	30
65#define	NETISR_POLLMORE	31		/* polling callback, must be last */
66
67
68#ifndef LOCORE
69#ifdef _KERNEL
70
71void legacy_setsoftnet(void);
72
73extern volatile unsigned int	netisr;	/* scheduling bits for network */
74#define	schednetisr(anisr) do {						\
75	atomic_set_rel_int(&netisr, 1 << (anisr));			\
76	legacy_setsoftnet();						\
77} while (0)
78/* used to atomically schedule multiple netisrs */
79#define	schednetisrbits(isrbits) do {					\
80	atomic_set_rel_int(&netisr, isrbits);				\
81	legacy_setsoftnet();						\
82} while (0)
83
84struct ifqueue;
85struct mbuf;
86
87typedef void netisr_t (struct mbuf *);
88
89void	netisr_dispatch(int, struct mbuf *);
90int	netisr_queue(int, struct mbuf *);
91#define	NETISR_MPSAFE	0x0001		/* ISR does not need Giant */
92void	netisr_register(int, netisr_t *, struct ifqueue *, int);
93void	netisr_unregister(int);
94
95#endif
96#endif
97
98#endif
99