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--- xnu/xnu-12377.101.15/iokit/Kernel/IODMAEventSource.cpp
+++ xnu/xnu-1228/iokit/Kernel/IODMAEventSource.cpp
@@ -2,7 +2,7 @@
* Copyright (c) 1998-2000 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
@@ -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,
@@ -22,11 +22,9 @@
* 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 <IOKit/IODMAEventSource.h>
#include <IOKit/IOService.h>
@@ -37,225 +35,132 @@
#define super IOEventSource
OSDefineMetaClassAndStructors(IODMAEventSource, IOEventSource);
-bool
-IODMAEventSource::init(OSObject *inOwner,
- IOService *inProvider,
- Action inCompletion,
- Action inNotification,
- UInt32 inDMAIndex)
+bool IODMAEventSource::init(OSObject *inOwner,
+ IOService *inProvider,
+ Action inCompletion,
+ Action inNotification,
+ UInt32 inDMAIndex)
{
- IOReturn result;
-
- if (!super::init(inOwner)) {
- return false;
- }
-
- if (inProvider == NULL) {
- return false;
- }
-
- dmaProvider = inProvider;
- dmaIndex = 0xFFFFFFFF;
- dmaCompletionAction = inCompletion;
- dmaNotificationAction = inNotification;
-
- dmaController.reset(IODMAController::getController(dmaProvider, inDMAIndex), OSRetain);
- if (dmaController == NULL) {
- return false;
- }
-
- result = dmaController->initDMAChannel(dmaProvider, this, &dmaIndex, inDMAIndex);
- if (result != kIOReturnSuccess) {
- return false;
- }
-
- queue_init(&dmaCommandsCompleted);
- dmaCommandsCompletedLock = IOSimpleLockAlloc();
-
- return true;
+ IOReturn result;
+
+ if (!super::init(inOwner)) return false;
+
+ if (inProvider == 0) return false;
+
+ dmaProvider = inProvider;
+ dmaIndex = 0xFFFFFFFF;
+ dmaCompletionAction = inCompletion;
+ dmaNotificationAction = inNotification;
+
+ dmaController = IODMAController::getController(dmaProvider, inDMAIndex);
+ if (dmaController == 0) return false;
+ dmaController->retain();
+
+ result = dmaController->initDMAChannel(dmaProvider, this, &dmaIndex, inDMAIndex);
+ if (result != kIOReturnSuccess) return false;
+
+ queue_init(&dmaCommandsCompleted);
+ dmaCommandsCompletedLock = IOSimpleLockAlloc();
+
+ return true;
}
-void
-IODMAEventSource::free()
+IODMAEventSource *IODMAEventSource::dmaEventSource(OSObject *inOwner,
+ IOService *inProvider,
+ Action inCompletion,
+ Action inNotification,
+ UInt32 inDMAIndex)
{
- if (dmaCommandsCompletedLock != NULL) {
- IOSimpleLockFree(dmaCommandsCompletedLock);
- }
- super::free();
+ IODMAEventSource *dmaES = new IODMAEventSource;
+
+ if (dmaES && !dmaES->init(inOwner, inProvider, inCompletion, inNotification, inDMAIndex)) {
+ dmaES->release();
+ return 0;
+ }
+
+ return dmaES;
}
-OSSharedPtr<IODMAEventSource>
-IODMAEventSource::dmaEventSource(OSObject *inOwner,
- IOService *inProvider,
- Action inCompletion,
- Action inNotification,
- UInt32 inDMAIndex)
+IOReturn IODMAEventSource::startDMACommand(IODMACommand *dmaCommand, IODirection direction, IOByteCount byteCount, IOByteCount byteOffset)
{
- OSSharedPtr<IODMAEventSource> dmaES = OSMakeShared<IODMAEventSource>();
-
- if (dmaES && !dmaES->init(inOwner, inProvider, inCompletion, inNotification, inDMAIndex)) {
- return nullptr;
- }
-
- return dmaES;
+ IOReturn result;
+
+ if ((dmaController == 0) || (dmaIndex == 0xFFFFFFFF)) return kIOReturnError;
+
+ if (dmaSynchBusy) return kIOReturnBusy;
+
+ if (dmaCompletionAction == 0) dmaSynchBusy = true;
+
+ result = dmaController->startDMACommand(dmaIndex, dmaCommand, direction, byteCount, byteOffset);
+
+ if (result != kIOReturnSuccess) {
+ dmaSynchBusy = false;
+ return result;
+ }
+
+ while (dmaSynchBusy) sleepGate(&dmaSynchBusy, THREAD_UNINT);
+
+ return kIOReturnSuccess;
}
-IOReturn
-IODMAEventSource::startDMACommand(IODMACommand *dmaCommand, IODirection direction, IOByteCount byteCount, IOByteCount byteOffset)
+IOReturn IODMAEventSource::stopDMACommand(bool flush, mach_timespec_t *timeout)
{
- IOReturn result;
-
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- if (dmaSynchBusy) {
- return kIOReturnBusy;
- }
-
- if (dmaCompletionAction == NULL) {
- dmaSynchBusy = true;
- }
-
- result = dmaController->startDMACommand(dmaIndex, dmaCommand, direction, byteCount, byteOffset);
-
- if (result != kIOReturnSuccess) {
- dmaSynchBusy = false;
- return result;
- }
-
- while (dmaSynchBusy) {
- sleepGate(&dmaSynchBusy, THREAD_UNINT);
- }
-
- return kIOReturnSuccess;
-}
-
-IOReturn
-IODMAEventSource::stopDMACommand(bool flush, uint64_t timeout)
-{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- return dmaController->stopDMACommand(dmaIndex, flush, timeout);
+ if ((dmaController == 0) || (dmaIndex == 0xFFFFFFFF)) return kIOReturnError;
+
+ return dmaController->stopDMACommand(dmaIndex, flush, timeout);
}
-IOReturn
-IODMAEventSource::queryDMACommand(IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle)
+IOReturn IODMAEventSource::queryDMACommand(IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle)
{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- return dmaController->queryDMACommand(dmaIndex, dmaCommand, transferCount, waitForIdle);
+ if ((dmaController == 0) || (dmaIndex == 0xFFFFFFFF)) return kIOReturnError;
+
+ return dmaController->queryDMACommand(dmaIndex, dmaCommand, transferCount, waitForIdle);
}
-IOByteCount
-IODMAEventSource::getFIFODepth(IODirection direction)
+// protected
+
+bool IODMAEventSource::checkForWork(void)
{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return 0;
- }
+ IODMACommand *dmaCommand = NULL;
+ bool work, again;
+
+ IOSimpleLockLock(dmaCommandsCompletedLock);
+ work = !queue_empty(&dmaCommandsCompleted);
+ if (work) {
+ queue_remove_first(&dmaCommandsCompleted, dmaCommand, IODMACommand *, fCommandChain);
+ again = !queue_empty(&dmaCommandsCompleted);
+ } else {
+ again = false;
+ }
+ IOSimpleLockUnlock(dmaCommandsCompletedLock);
- return dmaController->getFIFODepth(dmaIndex, direction);
+ if (work) {
+ (*dmaCompletionAction)(owner, this, dmaCommand, dmaCommand->reserved->fStatus, dmaCommand->reserved->fActualByteCount);
+ }
+
+ return again;
}
-
-IOReturn
-IODMAEventSource::setFIFODepth(IOByteCount depth)
+void IODMAEventSource::completeDMACommand(IODMACommand *dmaCommand)
{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- return dmaController->setFIFODepth(dmaIndex, depth);
+ if (dmaCompletionAction != 0) {
+ IOSimpleLockLock(dmaCommandsCompletedLock);
+ queue_enter(&dmaCommandsCompleted, dmaCommand, IODMACommand *, fCommandChain);
+ IOSimpleLockUnlock(dmaCommandsCompletedLock);
+
+ signalWorkAvailable();
+ } else {
+ dmaSynchBusy = false;
+ wakeupGate(&dmaSynchBusy, true);
+ }
}
-
-IOByteCount
-IODMAEventSource::validFIFODepth(IOByteCount depth, IODirection direction)
+void IODMAEventSource::notifyDMACommand(IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount)
{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- return dmaController->validFIFODepth(dmaIndex, depth, direction);
+ dmaCommand->reserved->fStatus = status;
+ dmaCommand->reserved->fActualByteCount = actualByteCount;
+
+ if (dmaNotificationAction != 0) (*dmaNotificationAction)(owner, this, dmaCommand, status, actualByteCount);
}
-
-
-IOReturn
-IODMAEventSource::setFrameSize(UInt8 byteCount)
-{
- if ((dmaController == NULL) || (dmaIndex == 0xFFFFFFFF)) {
- return kIOReturnError;
- }
-
- return dmaController->setFrameSize(dmaIndex, byteCount);
-}
-
-// protected
-
-bool
-IODMAEventSource::checkForWork(void)
-{
- IODMACommand *dmaCommand = NULL;
- bool work, again;
-
- IOSimpleLockLock(dmaCommandsCompletedLock);
- work = !queue_empty(&dmaCommandsCompleted);
- if (work) {
- queue_remove_first(&dmaCommandsCompleted, dmaCommand, IODMACommand *, fCommandChain);
- again = !queue_empty(&dmaCommandsCompleted);
- } else {
- again = false;
- }
- IOSimpleLockUnlock(dmaCommandsCompletedLock);
-
- if (work) {
- (*dmaCompletionAction)(owner, this, dmaCommand, dmaCommand->reserved->fStatus, dmaCommand->reserved->fActualByteCount, dmaCommand->reserved->fTimeStamp);
- }
-
- return again;
-}
-
-void
-IODMAEventSource::completeDMACommand(IODMACommand *dmaCommand)
-{
- if (dmaCompletionAction != NULL) {
- IOSimpleLockLock(dmaCommandsCompletedLock);
- queue_enter(&dmaCommandsCompleted, dmaCommand, IODMACommand *, fCommandChain);
- IOSimpleLockUnlock(dmaCommandsCompletedLock);
-
- signalWorkAvailable();
- } else {
- dmaSynchBusy = false;
- wakeupGate(&dmaSynchBusy, true);
- }
-}
-
-void
-IODMAEventSource::notifyDMACommand(IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount, AbsoluteTime timeStamp)
-{
- dmaCommand->reserved->fStatus = status;
- dmaCommand->reserved->fActualByteCount = actualByteCount;
- dmaCommand->reserved->fTimeStamp = timeStamp;
-
- if (dmaNotificationAction != NULL) {
- (*dmaNotificationAction)(owner, this, dmaCommand, status, actualByteCount, timeStamp);
- }
-}
-
-IOReturn
-IODMAEventSource::setDMAConfig(UInt32 newReqIndex)
-{
- return dmaController->setDMAConfig(dmaIndex, dmaProvider, newReqIndex);
-}
-
-bool
-IODMAEventSource::validDMAConfig(UInt32 newReqIndex)
-{
- return dmaController->validDMAConfig(dmaIndex, dmaProvider, newReqIndex);
-}