netisr.h revision 111926 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)netisr.h	8.1 (Berkeley) 6/10/93
34 * $FreeBSD: head/sys/net/netisr.h 111926 2003-03-05 19:24:24Z peter $
35 */
36
37#ifndef _NET_NETISR_H_
38#define _NET_NETISR_H_
39
40/*
41 * The networking code runs off software interrupts.
42 *
43 * You can switch into the network by doing splnet() and return by splx().
44 * The software interrupt level for the network is higher than the software
45 * level for the clock (so you can enter the network in routines called
46 * at timeout time).
47 */
48
49/*
50 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
51 * word which is used to de-multiplex a single software
52 * interrupt used for scheduling the network code to calls
53 * on the lowest level routine of each protocol.
54 */
55#define	NETISR_POLL	0		/* polling callback, must be first */
56#define	NETISR_IP	2		/* same as AF_INET */
57#define	NETISR_AARP	15		/* Appletalk ARP */
58#define	NETISR_ATALK2	16		/* Appletalk phase 2 */
59#define	NETISR_ATALK1	17		/* Appletalk phase 1 */
60#define	NETISR_ARP	18		/* same as AF_LINK */
61#define	NETISR_IPX	23		/* same as AF_IPX */
62#define	NETISR_USB	25		/* USB soft interrupt */
63#define	NETISR_PPP	26		/* PPP soft interrupt */
64#define	NETISR_IPV6	27
65#define	NETISR_NATM	28
66#define	NETISR_ATM	29
67#define	NETISR_NETGRAPH	30
68#define	NETISR_POLLMORE	31		/* polling callback, must be last */
69
70
71#ifndef LOCORE
72#ifdef _KERNEL
73
74void legacy_setsoftnet(void);
75
76extern volatile unsigned int	netisr;	/* scheduling bits for network */
77#define	schednetisr(anisr) do {						\
78	atomic_set_rel_int(&netisr, 1 << (anisr));			\
79	legacy_setsoftnet();						\
80} while (0)
81/* used to atomically schedule multiple netisrs */
82#define	schednetisrbits(isrbits) do {					\
83	atomic_set_rel_int(&netisr, isrbits);				\
84	legacy_setsoftnet();						\
85} while (0)
86
87struct ifqueue;
88struct mbuf;
89
90typedef void netisr_t (struct mbuf *);
91
92void	netisr_dispatch(int, struct mbuf *);
93int	netisr_queue(int, struct mbuf *);
94void	netisr_register(int, netisr_t *, struct ifqueue *);
95void	netisr_unregister(int);
96
97#endif
98#endif
99
100#endif
101