sys/net/netisr.h

   1 /*
   2  * Copyright (c) 2004 Jeffrey M. Hsu.  All rights reserved.
   3  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to The DragonFly Project
   6  * by Jeffrey M. Hsu.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of The DragonFly Project nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific, prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  23  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  24  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  26  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  27  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  28  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  29  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  30  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 /*
  35  * Copyright (c) 1980, 1986, 1989, 1993
  36  *      The Regents of the University of California.  All rights reserved.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)netisr.h    8.1 (Berkeley) 6/10/93
  67  * $FreeBSD: src/sys/net/netisr.h,v 1.21.2.5 2002/02/09 23:02:39 luigi Exp $
  68  * $DragonFly: src/sys/net/netisr.h,v 1.38 2008/10/27 02:56:30 sephe Exp $
  69  */
  70
  71 #ifndef _NET_NETISR_H_
  72 #define _NET_NETISR_H_
  73
  74 /*
  75  * The networking code runs off software interrupts.
  76  *
  77  * You can switch into the network by doing splnet() and return by splx().
  78  * The software interrupt level for the network is higher than the software
  79  * level for the clock (so you can enter the network in routines called
  80  * at timeout time).
  81  */
  82
  83 /*
  84  * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
  85  * word which is used to de-multiplex a single software
  86  * interrupt used for scheduling the network code to calls
  87  * on the lowest level routine of each protocol.
  88  */
  89 #define NETISR_RESERVED0 0              /* cannot be used */
  90 #define NETISR_IP       2               /* same as AF_INET */
  91 #define NETISR_NS       6               /* same as AF_NS */
  92 #define NETISR_AARP     15              /* Appletalk ARP */
  93 #define NETISR_ATALK2   16              /* Appletalk phase 2 */
  94 #define NETISR_ATALK1   17              /* Appletalk phase 1 */
  95 #define NETISR_ARP      18              /* same as AF_LINK */
  96 #define NETISR_MPLS     21              /* MPLS */
  97 #define NETISR_IPX      23              /* same as AF_IPX */
  98 #define NETISR_USB      25              /* USB soft interrupt */
  99 #define NETISR_PPP      27              /* PPP soft interrupt */
 100 #define NETISR_IPV6     28              /* same as AF_INET6 */
 101 #define NETISR_NATM     29              /* same as AF_NATM */
 102 #define NETISR_NETGRAPH 30              /* same as AF_NETGRAPH */
 103 #define NETISR_BLUETOOTH 31
 104
 105 #define NETISR_MAX      32
 106
 107 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 108
 109 #ifndef _SYS_TYPES_H_
 110 #include <sys/types.h>
 111 #endif
 112 #ifndef _SYS_QUEUE_H_
 113 #include <sys/queue.h>
 114 #endif
 115 #ifndef _SYS_PROTOSW_H_
 116 #include <sys/protosw.h>
 117 #endif
 118 #ifndef _SYS_MSGPORT_H_
 119 #include <sys/msgport.h>
 120 #endif
 121 #ifndef _NET_NETMSG_H_
 122 #include <net/netmsg.h>
 123 #endif
 124
 125 #endif
 126
 127 #ifdef _KERNEL
 128
 129 void netmsg_so_notify(netmsg_t);
 130 void netmsg_so_notify_abort(netmsg_t);
 131 void netmsg_so_notify_doabort(lwkt_msg_t);
 132
 133 #endif
 134
 135 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 136
 137 /*
 138  * Temporary pktinfo structure passed directly from the driver to
 139  * ether_input_chain(), allows us to bypass numerous checks.
 140  */
 141 struct pktinfo {
 142         int             pi_netisr;      /* netisr index, e.g. NETISR_IP */
 143         uint32_t        pi_flags;       /* PKTINFO_FLAG_ */
 144         int             pi_l3proto;     /* layer3 protocol number */
 145 };
 146
 147 #define PKTINFO_FLAG_FRAG      0x1
 148
 149 /*
 150  * NETISR_xxx registrations
 151  */
 152 struct netisr {
 153         netisr_fn_t     ni_handler;     /* packet handler function */
 154         netisr_ru_t     ni_rufunc;      /* rollup function */
 155         netisr_cpufn_t  ni_cpufn;       /* characterize pkt return cpu */
 156         struct netmsg_base ni_netmsg;   /* for sched_netisr() (no-data) */
 157 };
 158
 159 #endif
 160
 161 #ifdef _KERNEL
 162
 163 #define NETMSG_SERVICE_ADAPTIVE 1
 164 #define NETMSG_SERVICE_MPSAFE   2
 165
 166 extern lwkt_port netisr_adone_rport;
 167 extern lwkt_port netisr_afree_rport;
 168 extern lwkt_port netisr_apanic_rport;
 169 extern lwkt_port netisr_sync_port;
 170
 171 lwkt_port_t     cpu_portfn(int cpu);
 172 lwkt_port_t     cur_netport(void);
 173
 174 void            netisr_register(int, netisr_fn_t, netisr_cpufn_t);
 175 void            netisr_register_rollup(netisr_ru_t ru_func);
 176
 177 void            netisr_characterize(int num, struct mbuf **mp, int hoff);
 178 int             netisr_queue(int, struct mbuf *);
 179
 180 void            netmsg_service_port_init(lwkt_port_t);
 181 void            netmsg_service_sync(void);
 182 void            schednetisr(int);
 183
 184 #define curnetport      cur_netport()
 185
 186 #endif  /* _KERNEL */
 187
 188 #endif  /* _NET_NETISR_H_ */