bool IOInterruptEventSource::checkForWork()
{
unsigned int cacheProdCount = producerCount;
int numInts = cacheProdCount - consumerCount;
IOInterruptEventAction intAction = (IOInterruptEventAction) action;
if (numInts > 0) {
IOTimeStampLatency();
IOTimeTypeStampS(IOINTES_CLIENT);
IOTimeStampConstant(IODBG_INTES(IOINTES_ACTION),
(uintptr_t) intAction, (uintptr_t) owner);
(*intAction)(owner, this, numInts);
IOTimeTypeStampE(IOINTES_CLIENT);
consumerCount = cacheProdCount;
if (autoDisable && !explicitDisable)
enable();
}
else if (numInts < 0) {
IOTimeStampLatency();
IOTimeTypeStampS(IOINTES_CLIENT);
IOTimeStampConstant(IODBG_INTES(IOINTES_ACTION),
(uintptr_t) intAction, (uintptr_t) owner);
(*intAction)(owner, this, -numInts);
IOTimeTypeStampE(IOINTES_CLIENT);
consumerCount = cacheProdCount;
if (autoDisable && !explicitDisable)
enable();
}
return false;
}
void IOFilterInterruptEventSource::signalInterrupt()
{
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
IOStatisticsInterrupt();
producerCount++;
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
signalWorkAvailable();
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
}
void IOFilterInterruptEventSource::disableInterruptOccurred
(void */*refcon*/, IOService *prov, int source)
{
bool filterRes;
uint64_t startTime = 0;
uint64_t endTime = 0;
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_FILTER),
VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
if (IOInterruptEventSource::reserved->statistics) {
if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) {
startTime = mach_absolute_time();
}
}
// Call the filter.
filterRes = (*filterAction)(owner, this);
if (IOInterruptEventSource::reserved->statistics) {
if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
}
if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelTimeIndex)) {
endTime = mach_absolute_time();
IA_ADD_VALUE(&IOInterruptEventSource::reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelTimeIndex], endTime - startTime);
}
}
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_FILTER),
VM_KERNEL_UNSLIDE(filterAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
if (filterRes) {
prov->disableInterrupt(source); /* disable the interrupt */
signalInterrupt();
}
}
