/*

 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

 /**

  @file

  @internalComponent

  @released

 */

 #ifndef __CRYPTOH4AES__

 #define __CRYPTOH4AES__

 #include "cryptojobs.h"

 #include <drivers/dma.h>

 #define FAKE_DMA FakeDma

 //#define TDFC_WRAPPER

 #ifdef TDFC_WRAPPER

 class TDfcWrapper : public TDfc

 	{

 public:

 	TDfcWrapper(const TDfcWrapper &aOrig);

 	TDfcWrapper(TDfcFn aFunction, TAny* aPtr, TInt aPriority);

 	void Enque();

 private:

 	TDfcWrapper &operator=(const TDfcWrapper &aRHS);

 	void BaseEnque();

     static void DfcWrapperFunc(TAny* aPtr);

 	TDfcFn iRealFunction;

 	TAny *iRealPtr;

 	};

 #endif

 class DCryptoH4Chan;

 class DLddChanAes;

 class CryptoH4JobAes : public CryptoJobAes

 	{

 public:

 	CryptoH4JobAes(DLddChanAes &aLddChanAes);

 	~CryptoH4JobAes();

 	void SetDfcQ(TDfcQue *aDfcQue);

 	virtual TUint8 *GetKeyBuffer(); // Max 32 bytes long (256bits)

 	virtual TUint8 *GetIVBuffer(); // 16 bytes long

 	virtual TUint32 MaxBytes() const;

 	virtual TUint8 *GetIOBuffer(); // MaxBytes() long

 	virtual void GetToPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore);

 	virtual void BytesWrittenToPdd(TUint32 aBytes);

 	virtual void GetFromPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore);

 	virtual void BytesReadFromPdd(TUint32 aBytes);

 	// Must be called after setting the IV (if used)

 	virtual TInt SetDetails(DCryptoJobScheduler *aJobScheduler, 

 							MCryptoJobCallbacks *aCallbacks,

 							TBool aEncrypt, 

 							TInt aKeyLength,

 							RCryptoDriver::TChainingMode aMode);

 	virtual void NotifyReadRequestLength(TUint32 aReadRequestLength);

 	virtual void HwPerfCheck();

 private:	

 	// Implementations of virtual base class methods to support DCryptoJobScheduler

 	virtual void DoSlice(TBool aFirstSlice);

 	virtual TBool DoSaveState();

 	virtual void DoRestoreState();

 	virtual void DoReleaseHw();

 	void MaybeSetupWriteDmaToHw();

 #ifdef FAKE_DMA

 	void FakeDma();

 #endif

 	DLddChanAes &iLddChanAes;

 	// Details of job

 	TBool iEncrypt;

 	RCryptoDriver::TChainingMode iMode;

 	TUint32 iKeyLengthBytes;

 	TUint32 iKey[8]; // 128, 192 or 256 bits

 	TUint32 iIV[4]; // 128 bits

 	TUint32 iSavedState[4]; // Used for CBC chaining

 	TUint32 iReadRequestLength;

 	// The AES data buffer

 	//	TUint32 iAesBuffer[2*4+4]; // Temporary buffer 8 = 2x16 bytes blocks, +4 space (which never gets used)

 	TUint32 iAesBuffer[400*4+4]; // Temporary buffer 8 = 2x16 bytes blocks, +4 space (which never gets used)

 	// There are 4 indexes into the above buffer, and after converting

 	// all to bytes indexes, and allowing for wrapping the following

 	// condition should always hold iSwReadIndex <= iHwWriteIndex <=

 	// iHwReadIndex <= iSwWriteByteOffset

 	TInt32 iSwWriteByteOffset;

 	TInt32 iHwReadIndex;

 	TInt32 iHwWriteIndex;

 	TInt32 iSwReadByteOffset;

 	TBool iHwRunning;

 	TInt iDmaToHwPending;

 	TInt iDmaFromHwPending;

 #ifdef FAKE_DMA

 	TInt iFakeDmaToHwQueued;

 	TInt iFakeDmaFromHwQueued;

 #endif

 	void SetupHw(TBool aUseSavedState);

 	void SetupDma(TUint32 aPtr, TBool aToHw);

 	void StopHw();

 	static void DmaComplete(DDmaRequest::TResult aResult, TAny *aPtr);

     static void DmaToHwCompleteDfc(TAny* aPtr);

 	void DoDmaToHwCompleteDfc();

 #ifdef TDFC_WRAPPER

 	TDfcWrapper iDmaToHwCompleteDfc;

 #else

     TDfc iDmaToHwCompleteDfc;	

 #endif

 	void CheckIndexes() const;

 	void CompareIndexes(const char *aName, TInt32 aP1, TInt32 aP2) const;

     static void DmaFromHwCompleteDfc(TAny* aPtr);

 	void DoDmaFromHwCompleteDfc();

 #ifdef TDFC_WRAPPER

     TDfcWrapper iDmaFromHwCompleteDfc;	

 #else

     TDfc iDmaFromHwCompleteDfc;	

 #endif

 	};

 #endif