Document critical section and IPIQ interactions in the message port
[dragonfly.git] / sys / net / netisr.h
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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: src/sys/net/netisr.h,v 1.21.2.5 2002/02/09 23:02:39 luigi Exp $
8bde602d 35 * $DragonFly: src/sys/net/netisr.h,v 1.5 2003/09/15 23:38:13 hsu Exp $
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36 */
37
38#ifndef _NET_NETISR_H_
39#define _NET_NETISR_H_
40
41/*
42 * The networking code runs off software interrupts.
43 *
44 * You can switch into the network by doing splnet() and return by splx().
45 * The software interrupt level for the network is higher than the software
46 * level for the clock (so you can enter the network in routines called
47 * at timeout time).
48 */
49
50/*
51 * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
52 * word which is used to de-multiplex a single software
53 * interrupt used for scheduling the network code to calls
54 * on the lowest level routine of each protocol.
55 */
56#define NETISR_POLL 0 /* polling callback */
57#define NETISR_IP 2 /* same as AF_INET */
58#define NETISR_NS 6 /* same as AF_NS */
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59#define NETISR_AARP 15 /* Appletalk ARP */
60#define NETISR_ATALK2 16 /* Appletalk phase 2 */
61#define NETISR_ATALK1 17 /* Appletalk phase 1 */
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62#define NETISR_ARP 18 /* same as AF_LINK */
63#define NETISR_IPX 23 /* same as AF_IPX */
8bde602d 64#define NETISR_USB 25 /* USB soft interrupt */
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65#define NETISR_PPP 27 /* PPP soft interrupt */
66#define NETISR_IPV6 28 /* same as AF_INET6 */
67#define NETISR_NATM 29 /* same as AF_NATM */
68#define NETISR_NETGRAPH 30 /* same as AF_NETGRAPH */
69#define NETISR_POLLMORE 31 /* check if we need more polling */
70
8bde602d 71#define NETISR_MAX 32
ef0fdad1 72
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73
74#ifndef LOCORE
75#ifdef _KERNEL
8bde602d 76extern int isrmask;
984263bc 77
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78static __inline void
79schednetisr(int isrnum)
80{
81 atomic_set_int(&isrmask, 1 << isrnum);
82 setsoftnet();
83}
984263bc 84
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85struct mbuf;
86struct ifqueue;
ef0fdad1 87
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88typedef void (*netisr_fn_t)(struct mbuf *);
89
90/*
91 * This structure will change to use message ports instead of struct ifqueue.
92 * XXX JH
93 */
94struct netisr {
95 netisr_fn_t ni_handler;
96 struct ifqueue *ni_queue;
97};
98
99void netisr_dispatch(int, struct mbuf *);
100int netisr_queue(int, struct mbuf *);
101int netisr_register(int, netisr_fn_t, struct ifqueue *);
102int netisr_unregister(int);
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103
104#endif
105#endif
106
107#endif