FreeBSD/Linux Kernel Cross Reference
sys/iokit/IOKit/IODMAController.h

     /*
      * 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
      * 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
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
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     * 
     * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
     */
    
    #ifndef _IOKIT_IODMACONTROLLER_H
    #define _IOKIT_IODMACONTROLLER_H
    
    #include <IOKit/IODMACommand.h>
    #include <IOKit/IODMAEventSource.h>
    #include <IOKit/IOService.h>
    
    class IODMAController : public IOService
    {
      OSDeclareAbstractStructors(IODMAController);
      
      friend class IODMAEventSource;
      
     private:
      IOService       *_provider;
      const OSSymbol  *_dmaControllerName;
      
     protected:
      virtual void registerDMAController(IOOptionBits options = 0);  
      virtual IOReturn initDMAChannel(IOService *provider, IODMAEventSource *dmaES, UInt32 *dmaIndex, UInt32 reqIndex) = 0;
      virtual IOReturn startDMACommand(UInt32 dmaIndex, IODMACommand *dmaCommand, IODirection direction,
                                       IOByteCount byteCount = 0, IOByteCount byteOffset = 0) = 0;
      virtual IOReturn stopDMACommand(UInt32 dmaIndex, bool flush = false, mach_timespec_t * timeout = 0) = 0;
      virtual void completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand);
      virtual void notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount);
      virtual IOReturn queryDMACommand(UInt32 dmaIndex, IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle = false) = 0;
      
     public:
      static const OSSymbol *createControllerName(UInt32 phandle);
      static IODMAController *getController(IOService *provider, UInt32 dmaIndex);
      
      virtual bool start(IOService *provider);
    };
    
    
    #endif /* _IOKIT_IODMACONTROLLER_H */

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