| | 1 | /* |
| | 2 | * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. |
| | 3 | * |
| | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| | 5 | * |
| | 6 | * This file contains Original Code and/or Modifications of Original Code |
| | 7 | * as defined in and that are subject to the Apple Public Source License |
| | 8 | * Version 2.0 (the 'License'). You may not use this file except in |
| | 9 | * compliance with the License. The rights granted to you under the License |
| | 10 | * may not be used to create, or enable the creation or redistribution of, |
| | 11 | * unlawful or unlicensed copies of an Apple operating system, or to |
| | 12 | * circumvent, violate, or enable the circumvention or violation of, any |
| | 13 | * terms of an Apple operating system software license agreement. |
| | 14 | * |
| | 15 | * Please obtain a copy of the License at |
| | 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. |
| | 17 | * |
| | 18 | * The Original Code and all software distributed under the License are |
| | 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| | 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| | 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| | 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| | 23 | * Please see the License for the specific language governing rights and |
| | 24 | * limitations under the License. |
| | 25 | * |
| | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| | 27 | */ |
| | 28 | |
| | 29 | #ifndef _IOKIT_IODMACONTROLLER_H |
| | 30 | #define _IOKIT_IODMACONTROLLER_H |
| | 31 | |
| | 32 | #include <IOKit/IODMACommand.h> |
| | 33 | #include <IOKit/IODMAEventSource.h> |
| | 34 | #include <IOKit/IOService.h> |
| | 35 | |
| | 36 | class IODMAEventSource; |
| | 37 | |
| | 38 | class IODMAController : public IOService |
| | 39 | { |
| | 40 | OSDeclareAbstractStructors(IODMAController); |
| | 41 | |
| | 42 | friend class IODMAEventSource; |
| | 43 | |
| | 44 | private: |
| | 45 | IOService *_provider; |
| | 46 | const OSSymbol *_dmaControllerName; |
| | 47 | |
| | 48 | protected: |
| | 49 | virtual void registerDMAController(IOOptionBits options = 0); |
| | 50 | virtual IOReturn initDMAChannel(IOService *provider, IODMAEventSource *dmaES, UInt32 *dmaIndex, UInt32 reqIndex) = 0; |
| | 51 | virtual IOReturn startDMACommand(UInt32 dmaIndex, IODMACommand *dmaCommand, IODirection direction, |
| | 52 | IOByteCount byteCount = 0, IOByteCount byteOffset = 0) = 0; |
| | 53 | virtual IOReturn stopDMACommand(UInt32 dmaIndex, bool flush = false, uint64_t timeout = UINT64_MAX) = 0; |
| | 54 | virtual void completeDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand); |
| | 55 | virtual void notifyDMACommand(IODMAEventSource *dmaES, IODMACommand *dmaCommand, IOReturn status, IOByteCount actualByteCount); |
| | 56 | virtual IOReturn queryDMACommand(UInt32 dmaIndex, IODMACommand **dmaCommand, IOByteCount *transferCount, bool waitForIdle = false) = 0; |
| | 57 | virtual IOByteCount getFIFODepth(UInt32 dmaIndex) = 0; |
| | 58 | |
| | 59 | public: |
| | 60 | static const OSSymbol *createControllerName(UInt32 phandle); |
| | 61 | static IODMAController *getController(IOService *provider, UInt32 dmaIndex); |
| | 62 | |
| | 63 | virtual bool start(IOService *provider); |
| | 64 | }; |
| | 65 | |
| | 66 | |
| | 67 | #endif /* _IOKIT_IODMACONTROLLER_H */ |
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