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94 lines
3.5 KiB
C++
94 lines
3.5 KiB
C++
/*
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* Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _IOKIT_IODMAEVENTSOURCE_H
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#define _IOKIT_IODMAEVENTSOURCE_H
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#include <IOKit/IOService.h>
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#include <IOKit/IODMACommand.h>
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#include <IOKit/IODMAController.h>
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#include <IOKit/IOEventSource.h>
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class IODMAController;
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class IODMAEventSource : public IOEventSource
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{
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OSDeclareDefaultStructors(IODMAEventSource);
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friend class IODMAController;
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public:
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typedef void (*Action)(OSObject *owner, IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount, AbsoluteTime timeStamp);
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#define IODMAEventAction IODMAEventSource::Action
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protected:
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virtual void completeDMACommand(IODMACommand *dmaCommand);
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virtual void notifyDMACommand(IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount, AbsoluteTime timeStamp);
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public:
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static IODMAEventSource *dmaEventSource(OSObject *owner,
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IOService *provider,
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Action completion = 0,
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Action notification = 0,
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UInt32 dmaIndex = 0);
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virtual IOReturn startDMACommand(IODMACommand *dmaCommand, IODirection direction, IOByteCount byteCount = 0, IOByteCount byteOffset = 0);
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virtual IOReturn stopDMACommand(bool flush = false, uint64_t timeout = UINT64_MAX);
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virtual IOReturn queryDMACommand(IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle = false);
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virtual IOByteCount getFIFODepth(IODirection direction = kIODirectionNone);
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virtual IOReturn setFIFODepth(IOByteCount depth);
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virtual IOByteCount validFIFODepth(IOByteCount depth, IODirection direction);
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virtual IOReturn setFrameSize(UInt8 byteCount);
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virtual IOReturn setDMAConfig(UInt32 dmaIndex);
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virtual bool validDMAConfig(UInt32 dmaIndex);
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private:
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IOService *dmaProvider;
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IODMAController *dmaController;
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UInt32 dmaIndex;
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queue_head_t dmaCommandsCompleted;
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IOSimpleLock *dmaCommandsCompletedLock;
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Action dmaCompletionAction;
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Action dmaNotificationAction;
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bool dmaSynchBusy;
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virtual bool init(OSObject *owner,
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IOService *provider,
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Action completion = 0,
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Action notification = 0,
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UInt32 dmaIndex = 0);
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virtual bool checkForWork(void) APPLE_KEXT_OVERRIDE;
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virtual void free(void) APPLE_KEXT_OVERRIDE;
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};
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#endif /* _IOKIT_IODMAEVENTSOURCE_H */
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