1 /*

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

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 

    18 

    19 /**

    20  @file

    21  @internalComponent

    22  @released

    23 */

    24 #ifndef __CRYPTOH4AES__

    25 #define __CRYPTOH4AES__

    26 #include "cryptojobs.h"

    27 #include <drivers/dma.h>

    28 

    29 #define FAKE_DMA FakeDma

    30 

    31 //#define TDFC_WRAPPER

    32 

    33 #ifdef TDFC_WRAPPER

    34 class TDfcWrapper : public TDfc

    35 	{

    36 public:

    37 	TDfcWrapper(const TDfcWrapper &aOrig);

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

    39 	void Enque();

    40 private:

    41 	TDfcWrapper &operator=(const TDfcWrapper &aRHS);

    42 	void BaseEnque();

    43     static void DfcWrapperFunc(TAny* aPtr);

    44 	TDfcFn iRealFunction;

    45 	TAny *iRealPtr;

    46 	};

    47 #endif

    48 

    49 class DCryptoH4Chan;

    50 class DLddChanAes;

    51 class CryptoH4JobAes : public CryptoJobAes

    52 	{

    53 public:

    54 	CryptoH4JobAes(DLddChanAes &aLddChanAes);

    55 	~CryptoH4JobAes();

    56 

    57 	void SetDfcQ(TDfcQue *aDfcQue);

    58 

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

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

    61 	virtual TUint32 MaxBytes() const;

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

    63 

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

    65 	virtual void BytesWrittenToPdd(TUint32 aBytes);

    66 

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

    68 	virtual void BytesReadFromPdd(TUint32 aBytes);

    69 

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

    71 	virtual TInt SetDetails(DCryptoJobScheduler *aJobScheduler, 

    72 							MCryptoJobCallbacks *aCallbacks,

    73 							TBool aEncrypt, 

    74 							TInt aKeyLength,

    75 							RCryptoDriver::TChainingMode aMode);

    76 	virtual void NotifyReadRequestLength(TUint32 aReadRequestLength);

    77 	virtual void HwPerfCheck();

    78 	

    79 private:	

    80 	// Implementations of virtual base class methods to support DCryptoJobScheduler

    81 	virtual void DoSlice(TBool aFirstSlice);

    82 	virtual TBool DoSaveState();

    83 	virtual void DoRestoreState();

    84 	virtual void DoReleaseHw();

    85 

    86 	void MaybeSetupWriteDmaToHw();

    87 #ifdef FAKE_DMA

    88 	void FakeDma();

    89 #endif

    90 

    91 	DLddChanAes &iLddChanAes;

    92 	

    93 	// Details of job

    94 	TBool iEncrypt;

    95 	RCryptoDriver::TChainingMode iMode;

    96 

    97 	TUint32 iKeyLengthBytes;

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

    99 	TUint32 iIV[4]; // 128 bits

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

   101 

   102 	TUint32 iReadRequestLength;

   103 

   104 	// The AES data buffer

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

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

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

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

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

   110 	// iHwReadIndex <= iSwWriteByteOffset

   111 	TInt32 iSwWriteByteOffset;

   112 	TInt32 iHwReadIndex;

   113 	TInt32 iHwWriteIndex;

   114 	TInt32 iSwReadByteOffset;

   115 

   116 	TBool iHwRunning;

   117 	TInt iDmaToHwPending;

   118 	TInt iDmaFromHwPending;

   119 

   120 #ifdef FAKE_DMA

   121 	TInt iFakeDmaToHwQueued;

   122 	TInt iFakeDmaFromHwQueued;

   123 #endif

   124 	

   125 	void SetupHw(TBool aUseSavedState);

   126 	void SetupDma(TUint32 aPtr, TBool aToHw);

   127 	void StopHw();

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

   129 

   130     static void DmaToHwCompleteDfc(TAny* aPtr);

   131 	void DoDmaToHwCompleteDfc();

   132 #ifdef TDFC_WRAPPER

   133 	TDfcWrapper iDmaToHwCompleteDfc;

   134 #else

   135     TDfc iDmaToHwCompleteDfc;	

   136 #endif

   137 

   138 	void CheckIndexes() const;

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

   140 

   141     static void DmaFromHwCompleteDfc(TAny* aPtr);

   142 	void DoDmaFromHwCompleteDfc();

   143 #ifdef TDFC_WRAPPER

   144     TDfcWrapper iDmaFromHwCompleteDfc;	

   145 #else

   146     TDfc iDmaFromHwCompleteDfc;	

   147 #endif

   148 	};

   149 #endif