xref: /freebsd/sys/net/netisr.h (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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
94