FreeBSD/Linux Kernel Cross Reference
sys/net/netisr.h
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 * $FreeBSD$
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
66 void legacy_setsoftnet(void);
67
68 extern 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
79 struct ifqueue;
80 struct mbuf;
81
82 typedef void netisr_t (struct mbuf *);
83
84 void netisr_dispatch(int, struct mbuf *);
85 int netisr_queue(int, struct mbuf *);
86 #define NETISR_MPSAFE 0x0001 /* ISR does not need Giant */
87 void netisr_register(int, netisr_t *, struct ifqueue *, int);
88 void netisr_unregister(int);
89
90 #endif
91 #endif
92
93 #endif
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