117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
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/*
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/proc.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <net/netisr.h>
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static void swi_net(void *);
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void *net_ih;
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volatile unsigned int netisr;
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void (*netisrs[32])(void);
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void
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legacy_setsoftnet(void)
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{
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swi_sched(net_ih, 0);
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}
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int
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register_netisr(int num, netisr_t *handler)
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{
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if (num < 0 || num >= (sizeof(netisrs)/sizeof(*netisrs)) ) {
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printf("register_netisr: bad isr number: %d\n", num);
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return (EINVAL);
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}
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netisrs[num] = handler;
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return (0);
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}
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int
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unregister_netisr(int num)
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{
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if (num < 0 || num >= (sizeof(netisrs)/sizeof(*netisrs)) ) {
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printf("unregister_netisr: bad isr number: %d\n", num);
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return (EINVAL);
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}
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netisrs[num] = NULL;
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return (0);
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}
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#ifdef DEVICE_POLLING
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void netisr_pollmore(void);
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#endif
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static void
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swi_net(void *dummy)
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{
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u_int bits;
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int i;
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#ifdef DEVICE_POLLING
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for (;;) {
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int pollmore;
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#endif
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bits = atomic_readandclear_int(&netisr);
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#ifdef DEVICE_POLLING
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if (bits == 0)
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return;
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pollmore = bits & (1 << NETISR_POLL);
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#endif
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while ((i = ffs(bits)) != 0) {
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i--;
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if (netisrs[i] != NULL)
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netisrs[i]();
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else
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printf("swi_net: unregistered isr number: %d.\n", i);
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bits &= ~(1 << i);
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}
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#ifdef DEVICE_POLLING
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if (pollmore)
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netisr_pollmore();
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}
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#endif
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}
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static void
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start_netisr(void *dummy)
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{
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if (swi_add(NULL, "net", swi_net, NULL, SWI_NET, 0, &net_ih))
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panic("start_netisr");
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}
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SYSINIT(start_netisr, SI_SUB_SOFTINTR, SI_ORDER_FIRST, start_netisr, NULL)
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