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--- xnu/xnu-2422.100.13/iokit/Kernel/IOInterruptEventSource.cpp
+++ xnu/xnu-8792.61.2/iokit/Kernel/IOInterruptEventSource.cpp
@@ -1,8 +1,8 @@
/*
- * Copyright (c) 1998-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2014 Apple 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
@@ -11,10 +11,10 @@
* 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
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
@@ -22,10 +22,13 @@
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
+#define IOKIT_ENABLE_SHARED_PTR
+
+#include <ptrauth.h>
#include <IOKit/IOInterruptEventSource.h>
#include <IOKit/IOKitDebug.h>
#include <IOKit/IOLib.h>
@@ -33,6 +36,8 @@
#include <IOKit/IOInterrupts.h>
#include <IOKit/IOTimeStamp.h>
#include <IOKit/IOWorkLoop.h>
+#include <IOKit/IOInterruptAccountingPrivate.h>
+#include <libkern/Block_private.h>
#if IOKITSTATS
@@ -71,229 +76,465 @@
OSMetaClassDefineReservedUnused(IOInterruptEventSource, 6);
OSMetaClassDefineReservedUnused(IOInterruptEventSource, 7);
-bool IOInterruptEventSource::init(OSObject *inOwner,
- Action inAction,
- IOService *inProvider,
- int inIntIndex)
-{
- bool res = true;
-
- if ( !super::init(inOwner, (IOEventSourceAction) inAction) )
- return false;
-
- provider = inProvider;
- producerCount = consumerCount = 0;
- autoDisable = explicitDisable = false;
- intIndex = ~inIntIndex;
-
- // Assumes inOwner holds a reference(retain) on the provider
- if (inProvider) {
- 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);
-
- return (ret);
-}
-
-IOInterruptEventSource *
+bool
+IOInterruptEventSource::init(OSObject *inOwner,
+ Action inAction,
+ IOService *inProvider,
+ int inIntIndex)
+{
+ bool res = true;
+
+ if (inIntIndex < 0) {
+ return false;
+ }
+
+ if (!super::init(inOwner, (IOEventSourceAction) inAction)) {
+ return false;
+ }
+
+ reserved = IOMallocType(ExpansionData);
+
+ provider = inProvider;
+ producerCount = consumerCount = 0;
+ autoDisable = explicitDisable = false;
+ intIndex = ~inIntIndex;
+
+ // 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 = IOMallocType(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);
+}
+
+
+OSSharedPtr<IOInterruptEventSource>
IOInterruptEventSource::interruptEventSource(OSObject *inOwner,
- Action inAction,
- IOService *inProvider,
- int inIntIndex)
-{
- IOInterruptEventSource *me = new IOInterruptEventSource;
-
- if (me && !me->init(inOwner, inAction, inProvider, inIntIndex)) {
- me->release();
- return 0;
- }
-
- return me;
-}
-
-void IOInterruptEventSource::free()
-{
- if (provider && intIndex >= 0)
- provider->unregisterInterrupt(intIndex);
-
- super::free();
-}
-
-void IOInterruptEventSource::enable()
-{
- if (provider && intIndex >= 0) {
- provider->enableInterrupt(intIndex);
- explicitDisable = false;
- enabled = true;
- }
-}
-
-void IOInterruptEventSource::disable()
-{
- if (provider && intIndex >= 0) {
- provider->disableInterrupt(intIndex);
- explicitDisable = true;
- enabled = false;
- }
-}
-
-void IOInterruptEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
-{
- if (inWorkLoop) super::setWorkLoop(inWorkLoop);
-
- if (provider) {
+ Action inAction,
+ IOService *inProvider,
+ int inIntIndex)
+{
+ OSSharedPtr<IOInterruptEventSource> me = OSMakeShared<IOInterruptEventSource>();
+
+ if (me && !me->init(inOwner, inAction, inProvider, inIntIndex)) {
+ return nullptr;
+ }
+
+ return me;
+}
+
+OSSharedPtr<IOInterruptEventSource>
+IOInterruptEventSource::interruptEventSource(OSObject *inOwner,
+ IOService *inProvider,
+ int inIntIndex,
+ ActionBlock inAction)
+{
+ OSSharedPtr<IOInterruptEventSource> ies;
+ ies = IOInterruptEventSource::interruptEventSource(inOwner, (Action) NULL, inProvider, inIntIndex);
+ if (ies) {
+ ies->setActionBlock((IOEventSource::ActionBlock) inAction);
+ }
+
+ return ies;
+}
+
+void
+IOInterruptEventSource::free()
+{
+ if (provider && intIndex >= 0) {
+ unregisterInterruptHandler(provider, intIndex);
+ }
+
+ if (reserved) {
+ if (reserved->statistics) {
+ IOFreeType(reserved->statistics, IOInterruptAccountingData);
+ }
+
+ IOFreeType(reserved, ExpansionData);
+ }
+
+ super::free();
+}
+
+void
+IOInterruptEventSource::enable()
+{
+ if (provider && intIndex >= 0) {
+ provider->enableInterrupt(intIndex);
+ explicitDisable = false;
+ enabled = true;
+ }
+}
+
+void
+IOInterruptEventSource::disable()
+{
+ 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) {
- if (intIndex >= 0) {
- provider->unregisterInterrupt(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;
-}
-
-int IOInterruptEventSource::getIntIndex() const
-{
- return intIndex;
-}
-
-bool IOInterruptEventSource::getAutoDisable() const
-{
- return autoDisable;
-}
-
-bool IOInterruptEventSource::checkForWork()
-{
- unsigned int cacheProdCount = producerCount;
- int numInts = cacheProdCount - consumerCount;
- IOInterruptEventAction intAction = (IOInterruptEventAction) action;
+ super::setWorkLoop(inWorkLoop);
+ }
+}
+
+const IOService *
+IOInterruptEventSource::getProvider() const
+{
+ return provider;
+}
+
+int
+IOInterruptEventSource::getIntIndex() const
+{
+ return intIndex;
+}
+
+bool
+IOInterruptEventSource::getAutoDisable() const
+{
+ return autoDisable;
+}
+
+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;
+ IOEventSource::Action intAction = action;
+ ActionBlock intActionBlock = (ActionBlock) actionBlock;
+ void *address;
bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
-
- IOStatisticsCheckForWork();
-
- if ( numInts > 0 )
- {
- if (trace)
+
+ if (kActionBlock & flags) {
+ address = ptrauth_nop_cast(void *, _Block_get_invoke_fn((struct Block_layout *)intActionBlock));
+ } else {
+ address = ptrauth_nop_cast(void *, intAction);
+ }
+
+ IOStatisticsCheckForWork();
+
+ if (numInts > 0) {
+ if (trace) {
IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
- VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
-
+ VM_KERNEL_ADDRHIDE(address),
+ VM_KERNEL_ADDRHIDE(owner),
+ VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(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 (trace)
+ if (kActionBlock & flags) {
+ (intActionBlock)(this, numInts);
+ } else {
+ ((IOInterruptEventAction)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);
-
+ VM_KERNEL_ADDRHIDE(address),
+ VM_KERNEL_ADDRHIDE(owner),
+ VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+ }
+
consumerCount = cacheProdCount;
- if (autoDisable && !explicitDisable)
+ if (autoDisable && !explicitDisable) {
enable();
- }
-
- else if ( numInts < 0 )
- {
- if (trace)
+ }
+ } else if (numInts < 0) {
+ if (trace) {
IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
- VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
-
+ VM_KERNEL_ADDRHIDE(address),
+ VM_KERNEL_ADDRHIDE(owner),
+ VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(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 (trace)
+ if (kActionBlock & flags) {
+ (intActionBlock)(this, numInts);
+ } else {
+ ((IOInterruptEventAction)intAction)(owner, this, numInts);
+ }
+
+ if (reserved->statistics) {
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
+ endSystemTime = mach_absolute_time();
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
+ }
+
+ 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(kInterruptAccountingSecondLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelCountIndex], 1);
+ }
+ }
+
+ if (trace) {
IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),
- VM_KERNEL_UNSLIDE(intAction), (uintptr_t) owner, (uintptr_t) this, (uintptr_t) workLoop);
-
+ VM_KERNEL_ADDRHIDE(address),
+ VM_KERNEL_ADDRHIDE(owner),
+ VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+ }
+
consumerCount = cacheProdCount;
- if (autoDisable && !explicitDisable)
+ if (autoDisable && !explicitDisable) {
enable();
- }
-
- return false;
-}
-
-void IOInterruptEventSource::normalInterruptOccurred
- (void */*refcon*/, IOService */*prov*/, int /*source*/)
+ }
+ }
+
+ return false;
+}
+
+void
+IOInterruptEventSource::normalInterruptOccurred
+(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);
-
- signalWorkAvailable();
-
- if (trace)
- IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
-}
-
-void IOInterruptEventSource::disableInterruptOccurred
- (void */*refcon*/, IOService *prov, int source)
+
+ IOStatisticsInterrupt();
+ producerCount++;
+
+ if (trace) {
+ IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+ }
+
+ if (reserved->statistics) {
+ if (reserved->statistics->enablePrimaryTimestamp) {
+ reserved->statistics->primaryTimestamp = mach_absolute_time();
+ }
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+ }
+ }
+
+ signalWorkAvailable();
+
+ if (trace) {
+ IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+ }
+}
+
+void
+IOInterruptEventSource::disableInterruptOccurred
+(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);
-
- signalWorkAvailable();
-
- if (trace)
- IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), (uintptr_t) this, (uintptr_t) owner);
-}
-
-void IOInterruptEventSource::interruptOccurred
- (void *refcon, IOService *prov, int source)
-{
- if (autoDisable && prov)
- disableInterruptOccurred(refcon, prov, source);
- else
- normalInterruptOccurred(refcon, prov, source);
-}
-
-IOReturn IOInterruptEventSource::warmCPU
- (uint64_t abstime)
-{
-
+
+ prov->disableInterrupt(source); /* disable the interrupt */
+
+ IOStatisticsInterrupt();
+ producerCount++;
+
+ if (trace) {
+ IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+ }
+
+ if (reserved->statistics) {
+ if (reserved->statistics->enablePrimaryTimestamp) {
+ reserved->statistics->primaryTimestamp = mach_absolute_time();
+ }
+ if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+ IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+ }
+ }
+
+ signalWorkAvailable();
+
+ if (trace) {
+ IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+ }
+}
+
+void
+IOInterruptEventSource::interruptOccurred
+(void *_refcon, IOService *prov, int source)
+{
+ if (autoDisable && prov) {
+ disableInterruptOccurred(_refcon, prov, source);
+ } else {
+ normalInterruptOccurred(_refcon, prov, source);
+ }
+}
+
+IOReturn
+IOInterruptEventSource::warmCPU
+(uint64_t abstime)
+{
return ml_interrupt_prewarm(abstime);
}
+
+void
+IOInterruptEventSource::enablePrimaryInterruptTimestamp(bool enable)
+{
+ if (reserved->statistics) {
+ reserved->statistics->enablePrimaryTimestamp = enable;
+ }
+}
+
+uint64_t
+IOInterruptEventSource::getPrimaryInterruptTimestamp()
+{
+ if (reserved->statistics && reserved->statistics->enablePrimaryTimestamp) {
+ return reserved->statistics->primaryTimestamp;
+ }
+ return -1ULL;
+}