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1 /* |
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2 * Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 */ |
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17 |
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18 |
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19 /** |
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20 @file |
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21 @internalComponent |
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22 @released |
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23 */ |
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24 #ifndef __CRYPTOH4AES__ |
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25 #define __CRYPTOH4AES__ |
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26 #include "cryptojobs.h" |
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27 #include <drivers/dma.h> |
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28 |
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29 #define FAKE_DMA FakeDma |
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30 |
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31 //#define TDFC_WRAPPER |
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32 |
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33 #ifdef TDFC_WRAPPER |
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34 class TDfcWrapper : public TDfc |
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35 { |
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36 public: |
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37 TDfcWrapper(const TDfcWrapper &aOrig); |
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38 TDfcWrapper(TDfcFn aFunction, TAny* aPtr, TInt aPriority); |
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39 void Enque(); |
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40 private: |
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41 TDfcWrapper &operator=(const TDfcWrapper &aRHS); |
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42 void BaseEnque(); |
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43 static void DfcWrapperFunc(TAny* aPtr); |
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44 TDfcFn iRealFunction; |
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45 TAny *iRealPtr; |
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46 }; |
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47 #endif |
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48 |
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49 class DCryptoH4Chan; |
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50 class DLddChanAes; |
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51 class CryptoH4JobAes : public CryptoJobAes |
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52 { |
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53 public: |
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54 CryptoH4JobAes(DLddChanAes &aLddChanAes); |
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55 ~CryptoH4JobAes(); |
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56 |
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57 void SetDfcQ(TDfcQue *aDfcQue); |
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58 |
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59 virtual TUint8 *GetKeyBuffer(); // Max 32 bytes long (256bits) |
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60 virtual TUint8 *GetIVBuffer(); // 16 bytes long |
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61 virtual TUint32 MaxBytes() const; |
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62 virtual TUint8 *GetIOBuffer(); // MaxBytes() long |
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63 |
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64 virtual void GetToPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore); |
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65 virtual void BytesWrittenToPdd(TUint32 aBytes); |
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66 |
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67 virtual void GetFromPddBuffer(TUint8 * &aBuf, TUint32 &aBufLen, TBool &aMore); |
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68 virtual void BytesReadFromPdd(TUint32 aBytes); |
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69 |
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70 // Must be called after setting the IV (if used) |
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71 virtual TInt SetDetails(DCryptoJobScheduler *aJobScheduler, |
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72 MCryptoJobCallbacks *aCallbacks, |
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73 TBool aEncrypt, |
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74 TInt aKeyLength, |
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75 RCryptoDriver::TChainingMode aMode); |
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76 virtual void NotifyReadRequestLength(TUint32 aReadRequestLength); |
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77 virtual void HwPerfCheck(); |
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78 |
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79 private: |
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80 // Implementations of virtual base class methods to support DCryptoJobScheduler |
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81 virtual void DoSlice(TBool aFirstSlice); |
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82 virtual TBool DoSaveState(); |
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83 virtual void DoRestoreState(); |
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84 virtual void DoReleaseHw(); |
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85 |
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86 void MaybeSetupWriteDmaToHw(); |
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87 #ifdef FAKE_DMA |
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88 void FakeDma(); |
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89 #endif |
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90 |
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91 DLddChanAes &iLddChanAes; |
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92 |
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93 // Details of job |
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94 TBool iEncrypt; |
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95 RCryptoDriver::TChainingMode iMode; |
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96 |
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97 TUint32 iKeyLengthBytes; |
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98 TUint32 iKey[8]; // 128, 192 or 256 bits |
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99 TUint32 iIV[4]; // 128 bits |
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100 TUint32 iSavedState[4]; // Used for CBC chaining |
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101 |
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102 TUint32 iReadRequestLength; |
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103 |
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104 // The AES data buffer |
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105 // TUint32 iAesBuffer[2*4+4]; // Temporary buffer 8 = 2x16 bytes blocks, +4 space (which never gets used) |
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106 TUint32 iAesBuffer[400*4+4]; // Temporary buffer 8 = 2x16 bytes blocks, +4 space (which never gets used) |
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107 // There are 4 indexes into the above buffer, and after converting |
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108 // all to bytes indexes, and allowing for wrapping the following |
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109 // condition should always hold iSwReadIndex <= iHwWriteIndex <= |
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110 // iHwReadIndex <= iSwWriteByteOffset |
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111 TInt32 iSwWriteByteOffset; |
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112 TInt32 iHwReadIndex; |
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113 TInt32 iHwWriteIndex; |
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114 TInt32 iSwReadByteOffset; |
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115 |
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116 TBool iHwRunning; |
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117 TInt iDmaToHwPending; |
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118 TInt iDmaFromHwPending; |
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119 |
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120 #ifdef FAKE_DMA |
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121 TInt iFakeDmaToHwQueued; |
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122 TInt iFakeDmaFromHwQueued; |
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123 #endif |
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124 |
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125 void SetupHw(TBool aUseSavedState); |
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126 void SetupDma(TUint32 aPtr, TBool aToHw); |
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127 void StopHw(); |
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128 static void DmaComplete(DDmaRequest::TResult aResult, TAny *aPtr); |
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129 |
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130 static void DmaToHwCompleteDfc(TAny* aPtr); |
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131 void DoDmaToHwCompleteDfc(); |
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132 #ifdef TDFC_WRAPPER |
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133 TDfcWrapper iDmaToHwCompleteDfc; |
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134 #else |
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135 TDfc iDmaToHwCompleteDfc; |
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136 #endif |
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137 |
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138 void CheckIndexes() const; |
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139 void CompareIndexes(const char *aName, TInt32 aP1, TInt32 aP2) const; |
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140 |
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141 static void DmaFromHwCompleteDfc(TAny* aPtr); |
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142 void DoDmaFromHwCompleteDfc(); |
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143 #ifdef TDFC_WRAPPER |
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144 TDfcWrapper iDmaFromHwCompleteDfc; |
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145 #else |
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146 TDfc iDmaFromHwCompleteDfc; |
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147 #endif |
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148 }; |
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149 #endif |