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: src/sys/net/netisr.h,v 1.32.2.1 2005/01/31 23:26:23 imp Exp $
   31  */
   32 
   33 #ifndef _NET_NETISR_H_
   34 #define _NET_NETISR_H_
   35 
   36 /*
   37  * The networking code runs off software interrupts.
   38  *
   39  * You can switch into the network by doing splnet() and return by splx().
   40  * The software interrupt level for the network is higher than the software
   41  * level for the clock (so you can enter the network in routines called
   42  * at timeout time).
   43  */
   44 
   45 /*
   46  * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
   47  * word which is used to de-multiplex a single software
   48  * interrupt used for scheduling the network code to calls
   49  * on the lowest level routine of each protocol.
   50  */
   51 #define NETISR_POLL     0               /* polling callback, must be first */
   52 #define NETISR_IP       2               /* same as AF_INET */
   53 #define NETISR_ROUTE    14              /* routing socket */
   54 #define NETISR_AARP     15              /* Appletalk ARP */
   55 #define NETISR_ATALK2   16              /* Appletalk phase 2 */
   56 #define NETISR_ATALK1   17              /* Appletalk phase 1 */
   57 #define NETISR_ARP      18              /* same as AF_LINK */
   58 #define NETISR_IPX      23              /* same as AF_IPX */
   59 #define NETISR_USB      25              /* USB soft interrupt */
   60 #define NETISR_PPP      26              /* PPP soft interrupt */
   61 #define NETISR_IPV6     27
   62 #define NETISR_NATM     28
   63 #define NETISR_ATM      29
   64 #define NETISR_NETGRAPH 30
   65 #define NETISR_POLLMORE 31              /* polling callback, must be last */
   66 
   67 
   68 #ifndef LOCORE
   69 #ifdef _KERNEL
   70 
   71 void legacy_setsoftnet(void);
   72 
   73 extern volatile unsigned int    netisr; /* scheduling bits for network */
   74 #define schednetisr(anisr) do {                                         \
   75         atomic_set_rel_int(&netisr, 1 << (anisr));                      \
   76         legacy_setsoftnet();                                            \
   77 } while (0)
   78 /* used to atomically schedule multiple netisrs */
   79 #define schednetisrbits(isrbits) do {                                   \
   80         atomic_set_rel_int(&netisr, isrbits);                           \
   81         legacy_setsoftnet();                                            \
   82 } while (0)
   83 
   84 struct ifqueue;
   85 struct mbuf;
   86 
   87 typedef void netisr_t (struct mbuf *);
   88   
   89 void    netisr_dispatch(int, struct mbuf *);
   90 int     netisr_queue(int, struct mbuf *);
   91 #define NETISR_MPSAFE   0x0001          /* ISR does not need Giant */
   92 void    netisr_register(int, netisr_t *, struct ifqueue *, int);
   93 void    netisr_unregister(int);
   94 
   95 #endif
   96 #endif
   97 
   98 #endif

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