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|
/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $FreeBSD$
*
*/
/*
* FORE Systems 200-Series Adapter Support
* ---------------------------------------
*
* Interrupt processing
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <pci/pcivar.h>
#include <dev/hfa/fore.h>
#include <dev/hfa/fore_aali.h>
#include <dev/hfa/fore_slave.h>
#include <dev/hfa/fore_stats.h>
#include <dev/hfa/fore_var.h>
#include <dev/hfa/fore_include.h>
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
#if defined(sun)
/*
* Polling interrupt routine
*
* Polling interrupts are handled by calling all interrupt service
* routines for a given level until someone claims to have "handled" the
* interrupt.
*
* Called at interrupt level.
*
* Arguments:
* none
*
* Returns:
* 1 an interrupt has been serviced
* 0 no interrupts serviced
*
*/
int
fore_poll()
{
int serviced = 0;
int unit;
/*
* See if any of our devices are interrupting
*/
for ( unit = 0; unit < fore_nunits; unit++ )
{
Fore_unit *fup = fore_units[unit];
if (fup == NULL)
continue;
serviced += fore_intr((void *)fup);
}
/*
* Indicate if we handled an interrupt
*/
return (serviced ? 1 : 0);
}
#endif /* defined(sun) */
/*
* Device interrupt routine
*
* Called at interrupt level.
*
* Arguments:
* arg pointer to device unit structure
*
* Returns:
* 1 device interrupt was serviced
* 0 no interrupts serviced
*
*/
#if (defined(BSD) && (BSD <= 199306))
int
#else
void
#endif
fore_intr(arg)
void *arg;
{
Fore_unit *fup = arg;
Aali *aap;
#if (defined(BSD) && (BSD <= 199306))
int serviced = 0;
#endif
/*
* Try to prevent stuff happening after we've paniced
*/
if (panicstr) {
goto done;
}
/*
* Get to the microcode shared memory interface
*/
if ((aap = fup->fu_aali) == NULL)
goto done;
/*
* Has this card issued an interrupt??
*/
if (*fup->fu_psr) {
/*
* Indicate that we've serviced an interrupt.
*/
#if (defined(BSD) && (BSD <= 199306))
serviced = 1;
#endif
/*
* Clear the device interrupt
*/
if (fup->fu_config.ac_device == DEV_FORE_PCA200E)
PCA200E_HCR_SET(*fup->fu_ctlreg, PCA200E_CLR_HBUS_INT);
aap->aali_intr_sent = CP_WRITE(0);
/*
* Reset the watchdog timer
*/
fup->fu_timer = FORE_WATCHDOG;
/*
* Device initialization handled separately
*/
if ((fup->fu_flags & CUF_INITED) == 0) {
/*
* We're just initializing device now, so see if
* the initialization command has completed
*/
if (CP_READ(aap->aali_init.init_status) &
QSTAT_COMPLETED)
fore_initialize_complete(fup);
/*
* If we're still not inited, none of the host
* queues are setup yet
*/
if ((fup->fu_flags & CUF_INITED) == 0)
goto done;
}
/*
* Drain the queues of completed work
*/
fore_cmd_drain(fup);
fore_recv_drain(fup);
fore_xmit_drain(fup);
/*
* Supply more buffers to the CP
*/
fore_buf_supply(fup);
}
done:
#if (defined(BSD) && (BSD <= 199306))
return(serviced);
#else
return;
#endif
}
/*
* Watchdog timeout routine
*
* Called when we haven't heard from the card in a while. Just in case
* we missed an interrupt, we'll drain the queues and try to resupply the
* CP with more receive buffers. If the CP is partially wedged, hopefully
* this will be enough to get it going again.
*
* Called with interrupts locked out.
*
* Arguments:
* fup pointer to device unit structure
*
* Returns:
* none
*
*/
void
fore_watchdog(fup)
Fore_unit *fup;
{
/*
* Try to prevent stuff happening after we've paniced
*/
if (panicstr) {
return;
}
/*
* Reset the watchdog timer
*/
fup->fu_timer = FORE_WATCHDOG;
/*
* If the device is initialized, nudge it (wink, wink)
*/
if (fup->fu_flags & CUF_INITED) {
/*
* Drain the queues of completed work
*/
fore_cmd_drain(fup);
fore_recv_drain(fup);
fore_xmit_drain(fup);
/*
* Supply more buffers to the CP
*/
fore_buf_supply(fup);
}
return;
}
|
