X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/55e303ae13a4cf49d70f2294092726f2fffb9ef2..4d15aeb193b2c68f1d38666c317f8d3734f5f083:/iokit/Kernel/IOInterruptEventSource.cpp?ds=sidebyside diff --git a/iokit/Kernel/IOInterruptEventSource.cpp b/iokit/Kernel/IOInterruptEventSource.cpp index ddd980aef..1636405f6 100644 --- a/iokit/Kernel/IOInterruptEventSource.cpp +++ b/iokit/Kernel/IOInterruptEventSource.cpp @@ -1,16 +1,19 @@ /* - * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2014 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER @@ -20,47 +23,42 @@ * Please see the License for the specific language governing rights and * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @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 +#include #include #include #include #include #include +#include + +#if IOKITSTATS -#if KDEBUG +#define IOStatisticsInitializeCounter() \ +do { \ + IOStatistics::setCounterType(IOEventSource::reserved->counter, kIOStatisticsInterruptEventSourceCounter); \ +} while (0) -#define IOTimeTypeStampS(t) \ -do { \ - IOTimeStampStart(IODBG_INTES(t), \ - (unsigned int) this, (unsigned int) owner); \ -} while(0) +#define IOStatisticsCheckForWork() \ +do { \ + IOStatistics::countInterruptCheckForWork(IOEventSource::reserved->counter); \ +} while (0) -#define IOTimeTypeStampE(t) \ -do { \ - IOTimeStampEnd(IODBG_INTES(t), \ - (unsigned int) this, (unsigned int) owner); \ -} while(0) +#define IOStatisticsInterrupt() \ +do { \ + IOStatistics::countInterrupt(IOEventSource::reserved->counter); \ +} while (0) -#define IOTimeStampLatency() \ -do { \ - IOTimeStampEnd(IODBG_INTES(IOINTES_LAT), \ - (unsigned int) this, (unsigned int) owner); \ -} while(0) +#else -#else /* !KDEBUG */ -#define IOTimeTypeStampS(t) -#define IOTimeTypeStampE(t) -#define IOTimeStampLatency() -#endif /* KDEBUG */ +#define IOStatisticsInitializeCounter() +#define IOStatisticsCheckForWork() +#define IOStatisticsInterrupt() + +#endif // IOKITSTATS #define super IOEventSource @@ -84,39 +82,128 @@ bool IOInterruptEventSource::init(OSObject *inOwner, 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; + 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; + } - res = (kIOReturnSuccess - == inProvider->getInterruptType(inIntIndex, &intType)); - if (res) { - IOInterruptAction intHandler; + bzero(reserved->statistics, sizeof(IOInterruptAccountingData)); - autoDisable = (intType == kIOInterruptTypeLevel); - if (autoDisable) { - intHandler = (IOInterruptAction) - &IOInterruptEventSource::disableInterruptOccurred; - } - else - intHandler = (IOInterruptAction) - &IOInterruptEventSource::normalInterruptOccurred; - - res = (kIOReturnSuccess == inProvider->registerInterrupt - (inIntIndex, this, intHandler)); - if (res) - intIndex = inIntIndex; + 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, Action inAction, @@ -135,28 +222,60 @@ IOInterruptEventSource::interruptEventSource(OSObject *inOwner, 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; } } 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; @@ -174,69 +293,154 @@ bool IOInterruptEventSource::getAutoDisable() 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; - - 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++; + + if (trace) + IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner); -IOTimeTypeStampS(IOINTES_SEMA); + 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++; + + if (trace) + IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner); -IOTimeTypeStampS(IOINTES_SEMA); + 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 @@ -247,3 +451,10 @@ void IOInterruptEventSource::interruptOccurred else normalInterruptOccurred(refcon, prov, source); } + +IOReturn IOInterruptEventSource::warmCPU + (uint64_t abstime) +{ + + return ml_interrupt_prewarm(abstime); +}