117 lines
2.8 KiB
C
117 lines
2.8 KiB
C
/*
|
|
* 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)
|