/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/*
-Copyright (c) 1998 Apple Computer, Inc. All rights reserved.
-HISTORY
- 1998-7-13 Godfrey van der Linden(gvdl)
- Created.
-*/
#include <IOKit/IOInterruptEventSource.h>
#include <IOKit/IOKitDebug.h>
#include <IOKit/IOLib.h>
#include <IOKit/IOInterrupts.h>
#include <IOKit/IOTimeStamp.h>
#include <IOKit/IOWorkLoop.h>
+#include <IOKit/IOInterruptAccountingPrivate.h>
+
+#if IOKITSTATS
+
+#define IOStatisticsInitializeCounter() \
+do { \
+ IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsInterruptEventSourceCounter); \
+} while (0)
+
+#define IOStatisticsCheckForWork() \
+do { \
+ IOStatistics::countInterruptCheckForWork(IOEventSource::reserved->counter); \
+} while (0)
+
+#define IOStatisticsInterrupt() \
+do { \
+ IOStatistics::countInterrupt(IOEventSource::reserved->counter); \
+} while (0)
+
+#else
+
+#define IOStatisticsInitializeCounter()
+#define IOStatisticsCheckForWork()
+#define IOStatisticsInterrupt()
+
+#endif // IOKITSTATS
#define super IOEventSource
if ( !super::init(inOwner, (IOEventSourceAction) inAction) )
return false;
+ reserved = IONew(ExpansionData, 1);
+
+ if (!reserved) {
+ return false;
+ }
+
+ bzero(reserved, sizeof(ExpansionData));
+
provider = inProvider;
producerCount = consumerCount = 0;
autoDisable = explicitDisable = false;
// Assumes inOwner holds a reference(retain) on the provider
if (inProvider) {
+ if (IA_ANY_STATISTICS_ENABLED) {
+ /*
+ * We only treat this as an "interrupt" if it has a provider; if it does,
+ * set up the objects necessary to track interrupt statistics. Interrupt
+ * event sources without providers are most likely being used as simple
+ * event source in order to poke at workloops and kick off work.
+ *
+ * We also avoid try to avoid interrupt accounting overhead if none of
+ * the statistics are enabled.
+ */
+ reserved->statistics = IONew(IOInterruptAccountingData, 1);
+
+ if (!reserved->statistics) {
+ /*
+ * We rely on the free() routine to clean up after us if init fails
+ * midway.
+ */
+ return false;
+ }
+
+ bzero(reserved->statistics, sizeof(IOInterruptAccountingData));
+
+ reserved->statistics->owner = this;
+ }
+
res = (kIOReturnSuccess == registerInterruptHandler(inProvider, inIntIndex));
- if (res)
+
+ if (res) {
intIndex = inIntIndex;
+ }
}
+ IOStatisticsInitializeCounter();
+
return res;
}
ret = provider->registerInterrupt(inIntIndex, this, intHandler);
+ /*
+ * Add statistics to the provider. The setWorkLoop convention should ensure
+ * that we always go down the unregister path before we register (outside of
+ * init()), so we don't have to worry that we will invoke addInterruptStatistics
+ * erroneously.
+ */
+ if ((ret == kIOReturnSuccess) && (reserved->statistics)) {
+ /*
+ * Stash the normal index value, for the sake of debugging.
+ */
+ reserved->statistics->interruptIndex = inIntIndex;
+
+ /*
+ * We need to hook the interrupt information up to the provider so that it
+ * can find the statistics for this interrupt when desired. The provider is
+ * responsible for maintaining the reporter for a particular interrupt, and
+ * needs a handle on the statistics so that it can request that the reporter
+ * be updated as needed. Errors are considered "soft" for the moment (it
+ * will either panic, or fail in a way such that we can still service the
+ * interrupt).
+ */
+ provider->addInterruptStatistics(reserved->statistics, inIntIndex);
+
+ /*
+ * Add the statistics object to the global list of statistics objects; this
+ * is an aid to debugging (we can trivially find statistics for all eligible
+ * interrupts, and dump them; potentially helpful if the system is wedged
+ * due to interrupt activity).
+ */
+ interruptAccountingDataAddToList(reserved->statistics);
+ }
+
return (ret);
}
+void
+IOInterruptEventSource::unregisterInterruptHandler(IOService *inProvider,
+ int inIntIndex)
+{
+ if (reserved->statistics) {
+ interruptAccountingDataRemoveFromList(reserved->statistics);
+ provider->removeInterruptStatistics(reserved->statistics->interruptIndex);
+ }
+
+ provider->unregisterInterrupt(inIntIndex);
+}
+
+
IOInterruptEventSource *
IOInterruptEventSource::interruptEventSource(OSObject *inOwner,
Action inAction,
void IOInterruptEventSource::free()
{
if (provider && intIndex >= 0)
- provider->unregisterInterrupt(intIndex);
+ unregisterInterruptHandler(provider, intIndex);
+
+ if (reserved) {
+ if (reserved->statistics) {
+ IODelete(reserved->statistics, IOInterruptAccountingData, 1);
+ }
+
+ IODelete(reserved, ExpansionData, 1);
+ }
super::free();
}
void IOInterruptEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
{
- super::setWorkLoop(inWorkLoop);
-
- if (!provider)
- return;
-
- if ( !inWorkLoop ) {
- if (intIndex >= 0) {
- provider->unregisterInterrupt(intIndex);
+ if (inWorkLoop) super::setWorkLoop(inWorkLoop);
+
+ if (provider) {
+ if (!inWorkLoop) {
+ if (intIndex >= 0) {
+ /*
+ * It isn't necessarily safe to wait until free() to unregister the interrupt;
+ * our provider may disappear.
+ */
+ unregisterInterruptHandler(provider, intIndex);
+ intIndex = ~intIndex;
+ }
+ } else if ((intIndex < 0) && (kIOReturnSuccess == registerInterruptHandler(provider, ~intIndex))) {
intIndex = ~intIndex;
}
- } else if ((intIndex < 0) && (kIOReturnSuccess == registerInterruptHandler(provider, ~intIndex))) {
- intIndex = ~intIndex;
}
+
+ if (!inWorkLoop) super::setWorkLoop(inWorkLoop);
}
const IOService *IOInterruptEventSource::getProvider() const
bool IOInterruptEventSource::checkForWork()
{
+ uint64_t startSystemTime = 0;
+ uint64_t endSystemTime = 0;
+ uint64_t startCPUTime = 0;
+ uint64_t endCPUTime = 0;
unsigned int cacheProdCount = producerCount;
int numInts = cacheProdCount - consumerCount;
IOInterruptEventAction intAction = (IOInterruptEventAction) action;
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
-
+
+ IOStatisticsCheckForWork();
+
if ( numInts > 0 )
{
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
- (uintptr_t) intAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+ VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
+ startSystemTime = mach_absolute_time();
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
+ startCPUTime = thread_get_runtime_self();
+ }
+ }
// Call the handler
- (*intAction)(owner, this, numInts);
+ (*intAction)(owner, this, numInts);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCountIndex], 1);
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
+ endCPUTime = thread_get_runtime_self();
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCPUTimeIndex], endCPUTime - startCPUTime);
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
+ endSystemTime = mach_absolute_time();
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
+ }
+ }
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),
- (uintptr_t) intAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
-
- consumerCount = cacheProdCount;
- if (autoDisable && !explicitDisable)
- enable();
- }
+ VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+
+ consumerCount = cacheProdCount;
+ if (autoDisable && !explicitDisable)
+ enable();
+ }
else if ( numInts < 0 )
{
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
- (uintptr_t) intAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+ VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
+ startSystemTime = mach_absolute_time();
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
+ startCPUTime = thread_get_runtime_self();
+ }
+ }
// Call the handler
- (*intAction)(owner, this, -numInts);
+ (*intAction)(owner, this, -numInts);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCountIndex], 1);
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCPUTimeIndex)) {
+ endCPUTime = thread_get_runtime_self();
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCPUTimeIndex], endCPUTime - startCPUTime);
+ }
+
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
+ endSystemTime = mach_absolute_time();
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
+ }
+ }
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),
- (uintptr_t) intAction, (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
-
- consumerCount = cacheProdCount;
- if (autoDisable && !explicitDisable)
- enable();
- }
-
+ VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+
+ consumerCount = cacheProdCount;
+ if (autoDisable && !explicitDisable)
+ enable();
+ }
+
return false;
}
(void */*refcon*/, IOService */*prov*/, int /*source*/)
{
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
-
+
+ IOStatisticsInterrupt();
producerCount++;
-
+
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+ }
+ }
signalWorkAvailable();
-
+
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
}
(void */*refcon*/, IOService *prov, int source)
{
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
-
+
prov->disableInterrupt(source); /* disable the interrupt */
-
+
+ IOStatisticsInterrupt();
producerCount++;
-
+
if (trace)
IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+ }
+ }
signalWorkAvailable();
-
+
if (trace)
IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
}
else
normalInterruptOccurred(refcon, prov, source);
}
+
+IOReturn IOInterruptEventSource::warmCPU
+ (uint64_t abstime)
+{
+
+ return ml_interrupt_prewarm(abstime);
+}
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