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. Neither the name of the University nor the names of its contributors
  47  *    may be used to endorse or promote products derived from this software
  48  *    without specific prior written permission.
  49  *
  50  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  51  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  52  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  53  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  54  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  55  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  56  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  57  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  58  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  59  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  60  * SUCH DAMAGE.
  61  *
  62  *      @(#)netisr.h    8.1 (Berkeley) 6/10/93
  63  * $FreeBSD: src/sys/net/netisr.h,v 1.21.2.5 2002/02/09 23:02:39 luigi Exp $
  64  */
  65
  66 #ifndef _NET_NETISR_H_
  67 #define _NET_NETISR_H_
  68
  69 /*
  70  * The networking code runs off software interrupts.
  71  *
  72  * You can switch into the network by doing splnet() and return by splx().
  73  * The software interrupt level for the network is higher than the software
  74  * level for the clock (so you can enter the network in routines called
  75  * at timeout time).
  76  */
  77
  78 /*
  79  * Each ``pup-level-1'' input queue has a bit in a ``netisr'' status
  80  * word which is used to de-multiplex a single software
  81  * interrupt used for scheduling the network code to calls
  82  * on the lowest level routine of each protocol.
  83  */
  84 #define NETISR_RESERVED0 0              /* cannot be used */
  85 #define NETISR_IP       2               /* same as AF_INET */
  86 #define NETISR_ARP      18              /* same as AF_LINK */
  87 #define NETISR_MPLS     21              /* MPLS */
  88 #define NETISR_USB      25              /* USB soft interrupt */
  89 #define NETISR_PPP      27              /* PPP soft interrupt */
  90 #define NETISR_IPV6     28              /* same as AF_INET6 */
  91 #define NETISR_NETGRAPH 30              /* same as AF_NETGRAPH */
  92 #define NETISR_BLUETOOTH 31
  93
  94 #define NETISR_MAX      32
  95
  96 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  97
  98 #ifndef _SYS_TYPES_H_
  99 #include <sys/types.h>
 100 #endif
 101 #ifndef _SYS_QUEUE_H_
 102 #include <sys/queue.h>
 103 #endif
 104 #ifndef _SYS_PROTOSW_H_
 105 #include <sys/protosw.h>
 106 #endif
 107 #ifndef _SYS_MSGPORT_H_
 108 #include <sys/msgport.h>
 109 #endif
 110 #ifndef _NET_NETMSG_H_
 111 #include <net/netmsg.h>
 112 #endif
 113
 114 #endif
 115
 116 #ifdef _KERNEL
 117
 118 void netmsg_so_notify(netmsg_t);
 119 void netmsg_so_notify_abort(netmsg_t);
 120 void netmsg_so_notify_doabort(lwkt_msg_t);
 121
 122 #endif
 123
 124 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
 125
 126 /*
 127  * Temporary pktinfo structure passed directly from the driver to
 128  * ether_input(), allows us to bypass numerous checks.
 129  */
 130 struct pktinfo {
 131         int             pi_netisr;      /* netisr index, e.g. NETISR_IP */
 132         uint32_t        pi_flags;       /* PKTINFO_FLAG_ */
 133         int             pi_l3proto;     /* layer3 protocol number */
 134 };
 135
 136 #define PKTINFO_FLAG_FRAG      0x1
 137
 138 /*
 139  * NETISR_xxx registrations
 140  */
 141 struct netisr {
 142         netisr_fn_t     ni_handler;     /* packet handler function */
 143         netisr_hashck_t ni_hashck;      /* hash check function */
 144         netisr_hashfn_t ni_hashfn;      /* characterize pkt return hash */
 145         struct netmsg_base ni_netmsg;   /* for sched_netisr() (no-data) */
 146 };
 147
 148 #endif
 149
 150 #ifdef _KERNEL
 151
 152 /* NOTE: MUST be power-of-2 */
 153 #define NETISR_CPUMAX                   128     /* supported by most NICs */
 154 #define NETISR_CPUMASK                  (NETISR_CPUMAX - 1)
 155
 156 #define NETISR_ROLLUP_PRIO_TCP          200
 157 #define NETISR_ROLLUP_PRIO_IFSTART      50
 158
 159 extern int       netisr_ncpus;
 160 extern lwkt_port netisr_adone_rport;
 161 extern lwkt_port netisr_afree_rport;
 162 extern lwkt_port netisr_afree_free_so_rport;
 163 extern lwkt_port netisr_apanic_rport;
 164 extern lwkt_port netisr_sync_port;
 165
 166 struct netisr_rollup;
 167
 168 void            netisr_register(int, netisr_fn_t, netisr_hashfn_t);
 169 void            netisr_register_hashcheck(int, netisr_hashck_t);
 170 struct netisr_rollup
 171                 *netisr_register_rollup(netisr_ru_t ru_func, int ru_prio);
 172 void            netisr_unregister_rollup(struct netisr_rollup *key);
 173
 174 void            netisr_characterize(int num, struct mbuf **mp, int hoff);
 175 void            netisr_hashcheck(int num, struct mbuf *m,
 176                     const struct pktinfo *pi);
 177 int             netisr_queue(int, struct mbuf *);
 178 int             netisr_handle(int, struct mbuf *);
 179
 180 struct netisr_barrier *netisr_barrier_create(void);
 181 void            netisr_barrier_set(struct netisr_barrier *);
 182 void            netisr_barrier_rem(struct netisr_barrier *);
 183
 184 void            netmsg_service_sync(void);
 185 void            netmsg_sync_handler(netmsg_t);
 186 void            schednetisr(int);
 187
 188 #endif  /* _KERNEL */
 189
 190 #endif  /* _NET_NETISR_H_ */