The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
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  * 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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