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