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--- xnu/xnu-1228/iokit/Kernel/IOInterruptEventSource.cpp
+++ xnu/xnu-3789.41.3/iokit/Kernel/IOInterruptEventSource.cpp
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2014 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
@@ -25,45 +25,40 @@
*
* @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/IOService.h>
#include <IOKit/IOInterrupts.h>
#include <IOKit/IOTimeStamp.h>
#include <IOKit/IOWorkLoop.h>
-
-#if KDEBUG
-
-#define IOTimeTypeStampS(t) \
-do { \
- IOTimeStampStart(IODBG_INTES(t), \
- (unsigned int) this, (unsigned int) owner); \
-} while(0)
-
-#define IOTimeTypeStampE(t) \
-do { \
- IOTimeStampEnd(IODBG_INTES(t), \
- (unsigned int) this, (unsigned int) owner); \
-} while(0)
-
-#define IOTimeStampLatency() \
-do { \
- IOTimeStampEnd(IODBG_INTES(IOINTES_LAT), \
- (unsigned int) this, (unsigned int) owner); \
-} while(0)
-
-#else /* !KDEBUG */
-#define IOTimeTypeStampS(t)
-#define IOTimeTypeStampE(t)
-#define IOTimeStampLatency()
-#endif /* KDEBUG */
+#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
@@ -87,38 +82,127 @@
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;
- intIndex = -1;
+ intIndex = ~inIntIndex;
// Assumes inOwner holds a reference(retain) on the provider
if (inProvider) {
- int intType;
-
- res = (kIOReturnSuccess
- == inProvider->getInterruptType(inIntIndex, &intType));
- if (res) {
- IOInterruptAction intHandler;
-
- autoDisable = (intType == kIOInterruptTypeLevel);
- if (autoDisable) {
- intHandler = OSMemberFunctionCast(IOInterruptAction,
- this, &IOInterruptEventSource::disableInterruptOccurred);
+ 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;
}
- else
- intHandler = OSMemberFunctionCast(IOInterruptAction,
- this, &IOInterruptEventSource::normalInterruptOccurred);
-
- res = (kIOReturnSuccess == inProvider->registerInterrupt
- (inIntIndex, this, intHandler));
- if (res)
- intIndex = inIntIndex;
+
+ bzero(reserved->statistics, sizeof(IOInterruptAccountingData));
+
+ reserved->statistics->owner = this;
}
- }
+
+ res = (kIOReturnSuccess == registerInterruptHandler(inProvider, inIntIndex));
+
+ if (res) {
+ intIndex = inIntIndex;
+ }
+ }
+
+ IOStatisticsInitializeCounter();
return res;
}
+
+IOReturn IOInterruptEventSource::registerInterruptHandler(IOService *inProvider,
+ int inIntIndex)
+{
+ IOReturn ret;
+ int intType;
+ IOInterruptAction intHandler;
+
+ ret = inProvider->getInterruptType(inIntIndex, &intType);
+ if (kIOReturnSuccess != ret)
+ return (ret);
+
+ autoDisable = (intType == kIOInterruptTypeLevel);
+ if (autoDisable) {
+ intHandler = OSMemberFunctionCast(IOInterruptAction,
+ this, &IOInterruptEventSource::disableInterruptOccurred);
+ }
+ else
+ intHandler = OSMemberFunctionCast(IOInterruptAction,
+ this, &IOInterruptEventSource::normalInterruptOccurred);
+
+ 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,
@@ -138,15 +222,23 @@
void IOInterruptEventSource::free()
{
- if (provider && intIndex != -1)
- provider->unregisterInterrupt(intIndex);
+ if (provider && intIndex >= 0)
+ unregisterInterruptHandler(provider, intIndex);
+
+ if (reserved) {
+ if (reserved->statistics) {
+ IODelete(reserved->statistics, IOInterruptAccountingData, 1);
+ }
+
+ IODelete(reserved, ExpansionData, 1);
+ }
super::free();
}
void IOInterruptEventSource::enable()
{
- if (provider && intIndex != -1) {
+ if (provider && intIndex >= 0) {
provider->enableInterrupt(intIndex);
explicitDisable = false;
enabled = true;
@@ -155,13 +247,35 @@
void IOInterruptEventSource::disable()
{
- if (provider && intIndex != -1) {
+ if (provider && intIndex >= 0) {
provider->disableInterrupt(intIndex);
explicitDisable = true;
enabled = false;
}
}
+void IOInterruptEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
+{
+ 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;
+ }
+ }
+
+ if (!inWorkLoop) super::setWorkLoop(inWorkLoop);
+}
+
const IOService *IOInterruptEventSource::getProvider() const
{
return provider;
@@ -179,69 +293,154 @@
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;
-
- if (numInts > 0) {
-
- IOTimeStampLatency();
- IOTimeTypeStampS(IOINTES_CLIENT);
- IOTimeStampConstant(IODBG_INTES(IOINTES_ACTION),
- (unsigned int) intAction, (unsigned int) 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),
- (unsigned int) intAction, (unsigned int) owner);
- (*intAction)(owner, this, -numInts);
- IOTimeTypeStampE(IOINTES_CLIENT);
-
- consumerCount = cacheProdCount;
- if (autoDisable && !explicitDisable)
- enable();
- }
-
+ bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
+
+ IOStatisticsCheckForWork();
+
+ if ( numInts > 0 )
+ {
+ if (trace)
+ IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
+ 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);
+
+ 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),
+ 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),
+ 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);
+
+ 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),
+ VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
+
+ consumerCount = cacheProdCount;
+ if (autoDisable && !explicitDisable)
+ enable();
+ }
+
return false;
}
void IOInterruptEventSource::normalInterruptOccurred
(void */*refcon*/, IOService */*prov*/, int /*source*/)
{
-IOTimeTypeStampS(IOINTES_INTCTXT);
-IOTimeStampLatency();
-
+ bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
+
+ IOStatisticsInterrupt();
producerCount++;
-
-IOTimeTypeStampS(IOINTES_SEMA);
+
+ 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();
-IOTimeTypeStampE(IOINTES_SEMA);
-
-IOTimeTypeStampE(IOINTES_INTCTXT);
+
+ if (trace)
+ IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
}
void IOInterruptEventSource::disableInterruptOccurred
(void */*refcon*/, IOService *prov, int source)
{
-IOTimeTypeStampS(IOINTES_INTCTXT);
-IOTimeStampLatency();
-
+ bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
+
prov->disableInterrupt(source); /* disable the interrupt */
-
+
+ IOStatisticsInterrupt();
producerCount++;
-
-IOTimeTypeStampS(IOINTES_SEMA);
+
+ 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();
-IOTimeTypeStampE(IOINTES_SEMA);
-
-IOTimeTypeStampE(IOINTES_INTCTXT);
+
+ if (trace)
+ IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
}
void IOInterruptEventSource::interruptOccurred
@@ -252,3 +451,10 @@
else
normalInterruptOccurred(refcon, prov, source);
}
+
+IOReturn IOInterruptEventSource::warmCPU
+ (uint64_t abstime)
+{
+
+ return ml_interrupt_prewarm(abstime);
+}