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1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // os\kernelhwsrv\kernel\eka\drivers\display\display.cpp |
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15 // LDD for a Display driver with GCE support |
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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 @internalTechnology |
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22 @prototype |
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23 */ |
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24 |
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25 |
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26 #include <drivers/display.h> |
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27 #include <kernel/kern_priv.h> |
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28 |
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29 |
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30 const TUint8 KMutexOrder = 0x3f; |
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31 |
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32 static const char KDisplayLddPanic[] ="DISPLAY/GCE LDD"; |
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33 |
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34 _LIT(KClientRequestMutex, "ClientRequestMutex"); |
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35 |
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36 |
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37 /************************************************************************************ |
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38 * DDisplayLdd LDD class implementation |
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39 ************************************************************************************/ |
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40 DDisplayLdd::DDisplayLdd() |
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41 { |
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42 __DEBUG_PRINT("DDisplayLdd::DDisplayLdd()\n"); |
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43 // store the pointer to the current thread for request completion |
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44 iClient = &Kern::CurrentThread(); |
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45 __NK_ASSERT_DEBUG(iClient); |
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46 // Open a reference on the client thread so it's control block can't disappear until the driver has finished with it. |
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47 iClient->Open(); |
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48 iCurrentPostCount = 0; |
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49 iRequestedPostCount = 0; |
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50 iCompositionBuffIdx = 0; |
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51 iUnit = -1; |
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52 iThreadOpenCount = 0; |
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53 iAsyncReqCount = 0; |
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54 iClientRequestMutex = 0; |
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55 } |
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56 |
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57 |
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58 DDisplayLdd::~DDisplayLdd() |
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59 { |
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60 __DEBUG_PRINT("DDisplayLdd::~DDisplayLdd() \n"); |
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61 // cancel outstanding requests and destroy the queue of TClientRequest objects |
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62 for(TInt k = 0; k < KPendingReqArraySize ; k++) |
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63 { |
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64 for(TInt i = 0; i < KMaxQueuedRequests; i++) |
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65 { |
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66 //Method IsReady() returns true if the client’s request SetStatus method has been called but the |
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67 //coresponding QueueRequestComplete method hasn't. |
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68 if(iPendingReq[k][i].iTClientReq) |
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69 { |
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70 if(iPendingReq[k][i].iTClientReq->IsReady() ) |
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71 { |
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72 CompleteRequest(iPendingReq[k][i].iOwningThread,iPendingReq[k][i].iTClientReq,KErrCancel); |
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73 } |
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74 } |
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75 Kern::DestroyClientRequest(iClientRequest[k][i]); |
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76 } |
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77 } |
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78 |
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79 //Close User Buffer chunks not yet destroyed. |
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80 for(TInt i = 0; i < KDisplayUBMax; i++) |
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81 { |
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82 if(iUserBuffer[i].iChunk != 0) |
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83 { |
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84 Kern::ChunkClose(iUserBuffer[i].iChunk); |
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85 iUserBuffer[i].iChunk= NULL; |
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86 } |
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87 } |
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88 |
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89 Kern::SafeClose((DObject*&)iClient, NULL); |
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90 |
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91 |
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92 if (iClientRequestMutex != NULL) |
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93 { |
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94 iClientRequestMutex->Close(NULL); |
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95 } |
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96 |
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97 __ASSERT_DEBUG(iThreadOpenCount == 0,Kern::Fault(KDisplayLddPanic,__LINE__)); |
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98 __ASSERT_DEBUG(iAsyncReqCount == 0,Kern::Fault(KDisplayLddPanic,__LINE__)); |
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99 |
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100 // Clear the 'units open mask' in the LDD factory. |
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101 if (iUnit>=0) |
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102 ((DDisplayLddFactory*)iDevice)->SetUnitOpen(iUnit,EFalse); |
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103 |
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104 #ifdef _DEBUG |
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105 // Close the UDEB user mode chunk, if it exists |
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106 if (iChunk) |
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107 Kern::ChunkClose(iChunk); |
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108 #endif // _DEBUG |
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109 } |
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110 |
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111 |
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112 /** |
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113 LDD second stage constructor |
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114 */ |
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115 TInt DDisplayLdd::DoCreate(TInt aUnit, const TDesC8* /* anInfo*/, const TVersion& aVer) |
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116 { |
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117 |
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118 __DEBUG_PRINT("DDisplayLdd::DoCreate()\n"); |
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119 |
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120 if( !Kern::CurrentThreadHasCapability(ECapabilityPowerMgmt, __PLATSEC_DIAGNOSTIC_STRING("Checked by DISPLAY.LDD (GCE Driver)") ) |
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121 || !Kern::CurrentThreadHasCapability(ECapabilityReadDeviceData, __PLATSEC_DIAGNOSTIC_STRING("Checked by DISPLAY.LDD (GCE Driver)") ) |
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122 || !Kern::CurrentThreadHasCapability(ECapabilityWriteDeviceData,__PLATSEC_DIAGNOSTIC_STRING("Checked by DISPLAY.LDD (GCE Driver)") ) |
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123 || !Kern::CurrentThreadHasCapability(ECapabilityProtServ, __PLATSEC_DIAGNOSTIC_STRING("Checked by DISPLAY.LDD (GCE Driver)") ) ) |
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124 { |
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125 return KErrPermissionDenied; |
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126 } |
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127 |
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128 // Check that the display driver version specified by the client is compatible. |
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129 if (!Kern::QueryVersionSupported(RDisplayChannel::VersionRequired(),aVer)) |
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130 { |
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131 return(KErrNotSupported); |
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132 } |
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133 |
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134 // Check that a channel hasn't already been opened on this unit. |
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135 TInt r=((DDisplayLddFactory*)iDevice)->SetUnitOpen(aUnit,ETrue); // Try to update 'units open mask' in the LDD factory. |
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136 if (r!=KErrNone) |
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137 return r; |
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138 iUnit=aUnit; |
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139 |
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140 Pdd()->iLdd = this; |
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141 |
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142 r = Pdd()->CreateChannelSetup(aUnit); |
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143 if ( r!= KErrNone) |
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144 { |
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145 return r; |
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146 } |
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147 |
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148 // set up user buffer nodes |
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149 for (TInt node = 0; node < KDisplayUBMax; node++) |
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150 { |
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151 iUserBuffer[node].iType = EBufferTypeUser; |
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152 iUserBuffer[node].iBufferId = (node + 1); |
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153 iUserBuffer[node].iFree = ETrue; |
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154 iUserBuffer[node].iState = EBufferFree; |
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155 iUserBuffer[node].iAddress = 0; |
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156 iUserBuffer[node].iSize = 0; |
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157 iUserBuffer[node].iHandle = 0; |
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158 iUserBuffer[node].iChunk = 0; |
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159 iUserBuffer[node].iOffset = 0; |
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160 iUserBuffer[node].iPendingRequest = 0; |
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161 } |
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162 |
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163 //Initialise pending queue for asynchronous requests and queue of TClientRequests |
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164 for(TInt k = 0; k < KPendingReqArraySize; k++) |
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165 { |
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166 |
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167 iPendingIndex[k]=0; |
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168 |
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169 for(TInt i = 0; i < KMaxQueuedRequests; i++) |
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170 { |
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171 iPendingReq[k][i].iTClientReq = 0; |
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172 iPendingReq[k][i].iOwningThread = 0; |
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173 |
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174 |
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175 r = Kern::CreateClientRequest(iClientRequest[k][i]); |
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176 if (r != KErrNone) |
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177 { |
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178 return r; |
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179 } |
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180 } |
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181 } |
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182 |
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183 r = Kern::MutexCreate(iClientRequestMutex, KClientRequestMutex, KMutexOrder); |
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184 if (r != KErrNone) |
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185 { |
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186 return r; |
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187 } |
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188 |
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189 |
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190 Pdd()->SetGceMode(); |
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191 SetDfcQ(Pdd()->DfcQ(aUnit)); |
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192 iMsgQ.Receive(); |
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193 |
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194 return KErrNone; |
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195 } |
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196 |
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197 |
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198 /** |
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199 Override DLogicalChannel::SendMsg to process a client message before and after sending the message |
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200 to the DFC thread for processing by HandleMsg(). |
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201 |
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202 This function is called in the context of the client thread. |
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203 |
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204 The function is used to pin client data in the context of the client thread, so that data can be safely |
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205 accessed from kernel threads without the possibility of taking page faults. |
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206 |
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207 @param aMsg The message to process. |
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208 The iValue member of this distinguishes the message type: |
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209 iValue==ECloseMsg, channel close message |
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210 iValue==KMaxTInt, a 'DoCancel' message |
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211 iValue>=0, a 'DoControl' message with function number equal to iValue |
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212 iValue<0, a 'DoRequest' message with function number equal to ~iValue |
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213 |
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214 @return KErrNone if the message was send successfully, otherwise one of the other system-wide error |
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215 codes. |
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216 |
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217 */ |
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218 |
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219 TInt DDisplayLdd::SendMsg(TMessageBase* aMsg) |
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220 { |
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221 TThreadMessage& m=*(TThreadMessage*)aMsg; |
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222 TInt id = m.iValue; |
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223 |
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224 TInt r = KErrNone; |
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225 // close msg or cancel |
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226 if (id == (TInt)ECloseMsg || id == KMaxTInt) |
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227 { |
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228 r = DLogicalChannel::SendMsg(aMsg); |
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229 } |
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230 //asynchronous request |
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231 else if (id < 0) |
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232 { |
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233 TRequestStatus* pS=(TRequestStatus*)m.Ptr0(); |
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234 r = SendRequest(aMsg); |
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235 if (r != KErrNone) |
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236 Kern::RequestComplete(pS,r); |
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237 } |
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238 // synchronous request |
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239 else{ |
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240 r = SendControl(aMsg); |
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241 } |
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242 |
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243 return r; |
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244 } |
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245 |
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246 |
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247 /** |
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248 Validate, pre-process, send and post-process data for an asynchronous client request, so that data can be safely |
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249 accessed from kernel threads without the possibility of taking page faults. |
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250 |
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251 This function is called in the context of the client thread. |
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252 |
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253 @param aMsg The message to process. |
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254 The iValue member of this distinguishes the message type: |
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255 iValue==ECloseMsg, channel close message |
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256 iValue==KMaxTInt, a 'DoCancel' message |
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257 iValue>=0, a 'DoControl' message with function number equal to iValue |
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258 iValue<0, a 'DoRequest' message with function number equal to ~iValue |
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259 |
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260 @return KErrNone if the message was send successfully, otherwise one of the other system-wide error |
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261 codes. |
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262 */ |
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263 TInt DDisplayLdd::SendRequest(TMessageBase* aMsg) |
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264 { |
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265 TThreadMessage& m =*(TThreadMessage*)aMsg; |
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266 TInt aReqNumber = ~m.iValue; |
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267 TRequestStatus* pS =(TRequestStatus*)m.Ptr0(); |
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268 |
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269 #ifdef _GCE_DISPLAY_DEBUG |
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270 DThread* client = m.Client(); |
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271 #endif |
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272 |
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273 TInt r = KErrNotSupported; |
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274 TInt pendingIndex; |
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275 |
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276 /*Use thread local copies of the configuration data that need to be exchanged between the client and DFC thread. |
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277 Using thread local copies is possible even for asynchronous requests, since the values to be returned are known |
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278 when processing the request( inside DoRequest ) and not at a later stage.*/ |
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279 |
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280 TInt kernelCompBuffIdx; |
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281 TInt kernelpack[2]; |
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282 RDisplayChannel::TPostCount kernelCount; |
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283 |
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284 |
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285 //In asynchronous requests m.Ptr0 is used for the TRequestStatus object. |
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286 TAny* userConfigData1 = m.Ptr1(); |
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287 TAny* userConfigData2 = m.Ptr2(); |
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288 |
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289 /* |
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290 If the client request needs to pass some data to the DFC thread then we copy these to a thread local |
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291 copy(created in the thread supervisor stack) and then update the message to point to that local copy. |
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292 If the client will have to read a value updated in the DFC thread, then the message should just be |
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293 updated and point to the local copy. After the request has completed the updated data will be copied |
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294 from the local copy to the client, in the context of the client thread. |
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295 */ |
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296 |
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297 switch (aReqNumber) |
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298 { |
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299 case RDisplayChannel::EReqGetCompositionBuffer: //Client should read data updated in the DFC thread. |
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300 m.iArg[1] = &kernelCompBuffIdx; |
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301 break; |
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302 |
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303 case RDisplayChannel::EReqPostUserBuffer: //Both the client and DFC thread need to read data. |
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304 umemget32(&kernelpack, userConfigData1, (sizeof(TInt)*2) ); |
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305 m.iArg[1] = &kernelpack; |
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306 m.iArg[2] = &kernelCount; |
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307 break; |
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308 |
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309 case RDisplayChannel::EReqWaitForPost: //Client data should be passed to the DFC thread. |
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310 umemget32(&kernelCount, userConfigData1, sizeof(RDisplayChannel::TPostCount) ); |
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311 m.iArg[1] = &kernelCount; |
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312 break; |
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313 default: |
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314 return KErrNotSupported; |
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315 |
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316 } |
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317 |
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318 /* |
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319 The TClientRequest objects associated with each asynchronous request need to be accessed by both the client and DFC |
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320 threads. To resolve the potential synchronization problem we maintain two seperate pointers(iClientRequest and |
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321 iPendingReq.iClientReq )to the same TClientRequest object. iClientRequestMutex is used to synchronise access to |
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322 iClientRequest from different client threads. The first client thread that acquires the mutex will set the status |
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323 of an available TClientRequest object and send the message(call SendMsg). Consequently method DoRequest is queued for |
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324 execution by the DFC thread. DoRequest initialy saves iClientRequest to iPendingReq.iClientReq and queues the request. |
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325 Only then, the mutex is signaled. Another client thread trying to access iClientRequest will block in the mutex until |
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326 DoRequest has updated iPendingReq.iClientReq. Even more the DFC thread only accesses iClientRequest in DoRequest and |
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327 then iPendingReq.iClientReq is only used, so synchronizing access to iPendingReq.iClientReq is handled by the DFC queue. |
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328 */ |
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329 |
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330 // Need to be in critical section whilst holding a DMutex |
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331 NKern::ThreadEnterCS(); |
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332 |
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333 Kern::MutexWait(*iClientRequestMutex); |
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334 //Save the TRequestStatus in any available TClientRequest object for that asynchronous request. |
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335 |
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336 for( TInt k=0; k< KMaxQueuedRequests; k++) |
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337 { |
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338 //setStatus will return KErrInUse if a previous client request hasn't completed yet. |
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339 r = iClientRequest[aReqNumber][k]->SetStatus(pS); |
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340 if( r == KErrNone) |
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341 { |
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342 pendingIndex = k; |
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343 //The current available index for this pending request will be passed as |
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344 //another message argument to the DFC thread. |
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345 m.iArg[3] = (TAny*) pendingIndex; |
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346 break; |
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347 } |
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348 } |
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349 |
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350 if (r == KErrNone) |
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351 { |
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352 r = DLogicalChannel::SendMsg(aMsg); |
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353 } |
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354 else |
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355 { |
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356 __DEBUG_PRINT3("Client %08x trying to issue asynchronous request %d", client, aReqNumber); |
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357 //Fail if there aren't any available TClientRequest object |
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358 __ASSERT_DEBUG(r==KErrNone,Kern::Fault(KDisplayLddPanic,__LINE__)); |
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359 } |
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360 |
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361 Kern::MutexSignal(*iClientRequestMutex); |
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362 |
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363 NKern::ThreadLeaveCS(); |
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364 |
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365 //Copy config data from local copies to client, in context of client thread |
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366 switch (aReqNumber) |
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367 { |
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368 case RDisplayChannel::EReqGetCompositionBuffer: |
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369 __DEBUG_PRINT2("EReqGetCompositionBuffer: kernelCompBuffIdx returned =%d",kernelCompBuffIdx); |
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370 umemput32(userConfigData1, &kernelCompBuffIdx, sizeof(TInt) ); |
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371 break; |
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372 |
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373 case RDisplayChannel::EReqPostUserBuffer: |
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374 __DEBUG_PRINT2("EReqPostUserBuffer: kernelCount returned = %d",kernelCount); |
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375 umemput32(userConfigData2, &kernelCount, sizeof(RDisplayChannel::TPostCount) ); |
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376 break; |
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377 } |
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378 return r; |
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379 } |
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380 |
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381 |
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382 /** |
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383 Validate, pre-process, send and post-process data for a synchronous client request, so that data can be safely |
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384 accessed from kernel threads without the possibility of taking page faults. |
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385 |
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386 This function is called in the context of the client thread. |
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387 |
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388 @param aMsg The message to process. |
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389 The iValue member of this distinguishes the message type: |
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390 iValue==ECloseMsg, channel close message |
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391 iValue==KMaxTInt, a 'DoCancel' message |
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392 iValue>=0, a 'DoControl' message with function number equal to iValue |
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393 iValue<0, a 'DoRequest' message with function number equal to ~iValue |
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394 |
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395 @return KErrNone if the message was send successfully, otherwise one of the other system-wide error |
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396 codes. |
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397 */ |
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398 |
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399 TInt DDisplayLdd::SendControl(TMessageBase* aMsg) |
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400 { |
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401 TThreadMessage& m = *(TThreadMessage*)aMsg; |
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402 TInt aReqNumber = m.iValue; |
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403 |
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404 |
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405 //Use thread local copies of the configuration data that need to be exchanged between the client and DFC thread. |
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406 |
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407 RDisplayChannel::TPostCount kernelPostCount; |
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408 RDisplayChannel::TDisplayRotation kernelRotation; |
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409 |
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410 TPckgBuf<RDisplayChannel::TDisplayInfo> pckgInfo(iDisplayInfo); |
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411 |
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412 TInt kernelpack[2]; |
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413 TInt kernelBufferId; |
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414 TBool kernelRotChanged; |
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415 TInt kernelIndex; |
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416 |
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417 TAny* userConfigData0 = m.Ptr0(); |
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418 TAny* userConfigData1 = m.Ptr1(); |
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419 |
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420 |
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421 switch (aReqNumber) |
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422 { |
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423 //iDisplayInfo doesn't change after the driver initialisation so copy in client thread context |
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424 case RDisplayChannel::ECtrlGetDisplayInfo: |
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425 umemput32(userConfigData0, &pckgInfo, sizeof(TPckgBuf<RDisplayChannel::TDisplayInfo>) ); |
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426 return KErrNone; |
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427 |
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428 case RDisplayChannel::ECtrlPostCompositionBuffer: //Client should read data updated in the DFC thread. |
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429 m.iArg[1] = &kernelPostCount; |
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430 break; |
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431 |
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432 case RDisplayChannel::ECtrlPostLegacyBuffer: //Client should read data updated in the DFC thread. |
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433 m.iArg[1] = &kernelPostCount; |
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434 break; |
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435 |
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436 case RDisplayChannel::ECtrlRegisterUserBuffer: //Both the client and DFC thread need to read data. |
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437 umemget32(&kernelpack, userConfigData0, (sizeof(TInt)*2) ); |
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438 m.iArg[0] = &kernelpack; |
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439 m.iArg[1] = &kernelBufferId; |
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440 break; |
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441 |
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442 case RDisplayChannel::ECtrlDeregisterUserBuffer: //Client data should be passed to the DFC thread. |
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443 umemget32(&kernelBufferId, userConfigData0, sizeof(TInt) ); |
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444 m.iArg[0] = &kernelBufferId; |
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445 break; |
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446 |
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447 case RDisplayChannel::ECtrlSetRotation: //Both the client and DFC thread need to read data. |
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448 umemget32(&kernelRotation, userConfigData0, sizeof(RDisplayChannel::TDisplayRotation) ); |
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449 m.iArg[0] = &kernelRotation; |
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450 m.iArg[1] = &kernelRotChanged; |
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451 break; |
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452 |
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453 case RDisplayChannel::ECtrlCurrentRotation: //Client should read data updated in the DFC thread. |
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454 m.iArg[0] = &kernelRotation; |
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455 break; |
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456 |
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457 case RDisplayChannel::ECtrlGetCompositionBufferInfo: //Both the client and DFC thread need to read data. |
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458 umemget32(&kernelIndex, userConfigData0, sizeof(TInt) ); |
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459 m.iArg[0] = &kernelIndex; |
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460 m.iArg[1] = &kernelpack; |
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461 break; |
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462 |
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463 #ifdef _DEBUG |
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464 case RDisplayChannel::ECtrlCreateUserBuffer: |
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465 m.iArg[0] = userConfigData0; |
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466 m.iArg[1] = userConfigData1; |
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467 break; |
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468 #endif // _DEBUG |
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469 |
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470 default: |
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471 return KErrNotSupported; |
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472 |
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473 } |
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474 |
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475 TInt r = DLogicalChannel::SendMsg(aMsg); |
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476 if (r != KErrNone) |
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477 { |
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478 return r; |
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479 } |
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480 |
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481 //Copy config data from local copies to client, in context of client thread |
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482 switch (aReqNumber) |
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483 { |
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484 case RDisplayChannel::ECtrlPostCompositionBuffer: |
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485 __DEBUG_PRINT2("ECtrlPostCompositionBuffer =%d", kernelPostCount ); |
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486 umemput32(userConfigData1, &kernelPostCount, sizeof(RDisplayChannel::TPostCount) ); |
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487 break; |
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488 |
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489 case RDisplayChannel::ECtrlPostLegacyBuffer: |
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490 __DEBUG_PRINT2("ECtrlPostLegacyBuffer=%d", kernelPostCount ); |
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491 umemput32(userConfigData1, &kernelPostCount, sizeof(RDisplayChannel::TPostCount) ); |
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492 break; |
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493 |
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494 case RDisplayChannel::ECtrlRegisterUserBuffer: |
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495 __DEBUG_PRINT2("ECtrlRegisterUserBuffer kernelBufferId=%d", kernelBufferId ); |
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496 umemput32(userConfigData1, &kernelBufferId, sizeof(TInt) ); |
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497 break; |
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498 |
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499 case RDisplayChannel::ECtrlSetRotation: |
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500 __DEBUG_PRINT2("ECtrlSetRotation kernelRotChanged=%d", kernelRotChanged ); |
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501 umemput32(userConfigData1, &kernelRotChanged, sizeof(TBool) ); |
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502 break; |
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503 |
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504 case RDisplayChannel::ECtrlCurrentRotation: |
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505 __DEBUG_PRINT2("ECtrlCurrentRotation kernelRotation=%d", kernelRotation ); |
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506 umemput32(userConfigData0, &kernelRotation, sizeof(RDisplayChannel::TDisplayRotation) ); |
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507 break; |
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508 |
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509 case RDisplayChannel::ECtrlGetCompositionBufferInfo: |
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510 __DEBUG_PRINT3("ECtrlGetCompositionBufferInfo kernelpack[0] =%d and kernelpack[1] =%d", kernelpack[0], kernelpack[1]); |
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511 umemput32(userConfigData1, &kernelpack, (sizeof(TInt)*2) ); |
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512 break; |
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513 } |
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514 return r; |
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515 } |
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516 |
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517 |
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518 /** |
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519 All driver's client requests (synchronous and asynchronous) are sent as |
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520 kernel messages by generic kernel to logical channel. This function |
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521 catches messages sent by the generic kernel. |
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522 |
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523 @param aMsg Kernel side thread message to process. |
|
524 |
|
525 The iValue member of this distinguishes the message type: |
|
526 iValue==ECloseMsg, channel close message |
|
527 iValue==KMaxTInt, a 'DoCancel' message |
|
528 iValue>=0, a 'DoControl' message with function number equal to iValue |
|
529 iValue<0, a 'DoRequest' message with function number equal to ~iValue |
|
530 */ |
|
531 void DDisplayLdd::HandleMsg(TMessageBase* aMsg) |
|
532 { |
|
533 TThreadMessage& m = *(TThreadMessage*)aMsg ; |
|
534 TInt id = m.iValue ; |
|
535 DThread* client = m.Client(); |
|
536 |
|
537 // close message |
|
538 if (id == (TInt)ECloseMsg) |
|
539 { |
|
540 //Device specific cleanup operations |
|
541 Pdd()->CloseMsg(); |
|
542 |
|
543 // cancel outstanding requests |
|
544 for(TInt k = 0; k < KPendingReqArraySize; k++) |
|
545 { |
|
546 for(TInt i = 0; i < KMaxQueuedRequests; i++) |
|
547 { |
|
548 if( iPendingReq[k][i].iTClientReq) |
|
549 { |
|
550 if(iPendingReq[k][i].iTClientReq->IsReady() ) |
|
551 { |
|
552 CompleteRequest(iPendingReq[k][i].iOwningThread,iPendingReq[k][i].iTClientReq,KErrCancel); |
|
553 } |
|
554 } |
|
555 } |
|
556 } |
|
557 Pdd()->SetLegacyMode(); |
|
558 m.Complete(KErrNone, EFalse); |
|
559 return; |
|
560 } |
|
561 // cancel |
|
562 if (id == KMaxTInt) |
|
563 { |
|
564 // DoCancel |
|
565 TInt req = m.Int0() >> 1; |
|
566 DoCancel(req); |
|
567 m.Complete(KErrNone,ETrue); |
|
568 return; |
|
569 } |
|
570 // asynchronous request |
|
571 else if (id < 0) |
|
572 { |
|
573 //m.Int3() is the index, in the array of pending requests, to be used. |
|
574 TInt r = DoRequest(~id,m.Ptr1(),m.Ptr2(),m.Int3(), client); |
|
575 m.Complete(r, ETrue); |
|
576 } |
|
577 // synchronous request |
|
578 else |
|
579 { |
|
580 TInt r = DoControl(id,m.Ptr0(),m.Ptr1(), client); |
|
581 m.Complete(r,ETrue); |
|
582 } |
|
583 } |
|
584 |
|
585 |
|
586 /** |
|
587 Cancel outstanding request. |
|
588 |
|
589 @param aReqNumber Any value from the RDisplayChannel::TRequest enumeration. |
|
590 */ |
|
591 void DDisplayLdd::DoCancel(TUint aReqNumber) |
|
592 { |
|
593 __DEBUG_PRINT2("DDisplayLdd::DoCancel %d\n",aReqNumber); |
|
594 |
|
595 switch (aReqNumber) |
|
596 { |
|
597 case RDisplayChannel::ECtrlCancelGetCompositionBuffer: |
|
598 case RDisplayChannel::ECtrlCancelPostUserBuffer: |
|
599 case RDisplayChannel::ECtrlCancelWaitForPost: |
|
600 TInt pendingIndex = iPendingIndex[aReqNumber]; |
|
601 if(iPendingReq[aReqNumber][pendingIndex].iTClientReq) |
|
602 { |
|
603 if( iPendingReq[aReqNumber][pendingIndex].iTClientReq->IsReady() ) |
|
604 { |
|
605 CompleteRequest(iPendingReq[aReqNumber][pendingIndex].iOwningThread,iPendingReq[aReqNumber][pendingIndex].iTClientReq,KErrCancel); |
|
606 } |
|
607 } |
|
608 break; |
|
609 } |
|
610 |
|
611 } |
|
612 |
|
613 /** |
|
614 Asynchronous request processing. |
|
615 |
|
616 @param aFunction Request function number |
|
617 @param apArg1 Pointer to kernel message argument 1. |
|
618 @param apArg2 Pointer to kernel message argument 2. |
|
619 @param aPendingIndex Index pointing to the appropriate TClientRequest object to use. |
|
620 @param aClient Pointer to the client thread that issued the asynchronous request. |
|
621 |
|
622 @return request scheduling result, system-wide error code. |
|
623 */ |
|
624 TInt DDisplayLdd::DoRequest(TInt aReqNumber, TAny* aArg1, TAny* aArg2, TInt aPendingIndex, DThread* aClient) |
|
625 { |
|
626 |
|
627 TInt pack[2]; |
|
628 TInt r = KErrNone; |
|
629 TBufferNode* node = 0; |
|
630 TInt buffer_id = 0; |
|
631 |
|
632 TInt* configBufferIdx ; |
|
633 RDisplayChannel::TPostCount* postCount; |
|
634 TInt* configPack; |
|
635 |
|
636 __DEBUG_PRINT5("DoRequest: iClientRequest[aReqNumber=%d][aPendingIndex=%d] is %08x and aClient=%08x\n",aReqNumber, aPendingIndex,iClientRequest[aReqNumber][aPendingIndex], aClient); |
|
637 |
|
638 // Open a reference on the client thread while the request is pending so it's control block can't disappear until this driver has finished with it. |
|
639 r=aClient->Open(); |
|
640 __ASSERT_ALWAYS(r==KErrNone,Kern::Fault(KDisplayLddPanic,__LINE__)); |
|
641 #ifdef _DEBUG |
|
642 __e32_atomic_add_ord32(&iThreadOpenCount, 1); |
|
643 #endif |
|
644 |
|
645 for(TInt i = 0; i < KMaxQueuedRequests; i++) |
|
646 { |
|
647 //Don't cancel the asyncrhonous request we currently process. |
|
648 if (i == aPendingIndex) |
|
649 { |
|
650 continue; |
|
651 } |
|
652 // cancel outstanding request |
|
653 if(iPendingReq[aReqNumber][i].iTClientReq) |
|
654 { |
|
655 //If IsReady() returns true, setStatus has been called for that TCientRequest but QueueRequestComplete hasn't. |
|
656 //In that case we want to cancel this outstanding request. Given that all QueueRequestComplete calls execute |
|
657 // in the same DFC thread we currently run, there is no need to synchronise request completion calls. |
|
658 if(iPendingReq[aReqNumber][i].iTClientReq->IsReady() ) |
|
659 { |
|
660 CompleteRequest(iPendingReq[aReqNumber][i].iOwningThread,iPendingReq[aReqNumber][i].iTClientReq,KErrCancel); |
|
661 break; |
|
662 } |
|
663 } |
|
664 } |
|
665 // store index, request and client |
|
666 iPendingIndex[aReqNumber] = aPendingIndex; |
|
667 iPendingReq[aReqNumber][aPendingIndex].iTClientReq = iClientRequest[aReqNumber][aPendingIndex]; |
|
668 iPendingReq[aReqNumber][aPendingIndex].iOwningThread = aClient; |
|
669 |
|
670 #ifdef _DEBUG |
|
671 __e32_atomic_add_ord32(&iAsyncReqCount, 1); |
|
672 #endif |
|
673 |
|
674 switch (aReqNumber) |
|
675 { |
|
676 case RDisplayChannel::EReqGetCompositionBuffer: //DFC thread updates a value the client thread should read. |
|
677 { |
|
678 configBufferIdx = (TInt*) aArg1; |
|
679 |
|
680 TInt index; |
|
681 TBool found = EFalse; |
|
682 |
|
683 for(index = 0; index < (TInt) iDisplayInfo.iNumCompositionBuffers; index++) |
|
684 { |
|
685 if(iCompositionBuffer[index].iState == EBufferFree || iCompositionBuffer[index].iState == EBufferCompose ) |
|
686 { |
|
687 __DEBUG_PRINT2("EReqGetCompositionBuffer: Getting iCompositionBuffer[%d] \n", index); |
|
688 |
|
689 iCompositionBuffIdx = index; |
|
690 *configBufferIdx = iCompositionBuffIdx; |
|
691 iCompositionBuffer[iCompositionBuffIdx].iState = EBufferCompose; |
|
692 CompleteRequest(iPendingReq[aReqNumber][aPendingIndex].iOwningThread,iPendingReq[aReqNumber][aPendingIndex].iTClientReq,r); |
|
693 found = ETrue; |
|
694 break; |
|
695 } |
|
696 } |
|
697 if(!found) //There are no free buffers schedule request for completion |
|
698 { |
|
699 //Case of a single composition buffer. |
|
700 if (iDisplayInfo.iNumCompositionBuffers == 1) |
|
701 { |
|
702 iCompositionBuffIdx = 0; |
|
703 *configBufferIdx = iCompositionBuffIdx; |
|
704 CompleteRequest(iPendingReq[aReqNumber][aPendingIndex].iOwningThread, iPendingReq[aReqNumber][aPendingIndex].iTClientReq, r); |
|
705 __DEBUG_PRINT("EReqGetCompositionBuffer The single Composition buffer is currently being used\n"); |
|
706 break; |
|
707 } |
|
708 |
|
709 |
|
710 for( index=0; index< KDisplayCBMax; index++) |
|
711 { |
|
712 if(iCompositionBuffer[index].iState == EBufferActive) |
|
713 { |
|
714 iCompositionBuffIdx = index; |
|
715 *configBufferIdx = iCompositionBuffIdx; |
|
716 __DEBUG_PRINT2("EReqGetCompositionBuffer No composition buffer available. Next available is iCompositionBuffIdx %d.\n",iCompositionBuffIdx ); |
|
717 break; |
|
718 } |
|
719 } |
|
720 } |
|
721 |
|
722 break; |
|
723 } |
|
724 |
|
725 case RDisplayChannel::EReqPostUserBuffer: //DFC thread should read client message data and update a value the client will read. |
|
726 configPack = (TInt*) aArg1; |
|
727 pack[0] = *configPack; |
|
728 configPack++; |
|
729 pack[1] = *configPack; |
|
730 |
|
731 r = KErrArgument; |
|
732 buffer_id = pack[0]; |
|
733 if ( (buffer_id > 0) && (buffer_id <= KDisplayUBMax) ) |
|
734 { |
|
735 node = FindUserBufferNode(buffer_id); |
|
736 if(node && (!(node->iFree) && node->iChunk ) ) |
|
737 { |
|
738 __DEBUG_PRINT2("EReqPostUserBuffer Posting buffer id: %d \n",buffer_id ); |
|
739 r = Pdd()->PostUserBuffer(node); |
|
740 if(r == KErrNone) |
|
741 { |
|
742 postCount = (RDisplayChannel::TPostCount*) aArg2; |
|
743 ++iCurrentPostCount; |
|
744 *postCount= iCurrentPostCount; |
|
745 break; |
|
746 } |
|
747 } |
|
748 } |
|
749 RequestComplete(RDisplayChannel::EReqPostUserBuffer, r); |
|
750 |
|
751 break; |
|
752 |
|
753 case RDisplayChannel::EReqWaitForPost: //DFC thread should read client message data. |
|
754 postCount = (RDisplayChannel::TPostCount*) aArg1; |
|
755 iRequestedPostCount = *postCount; |
|
756 |
|
757 //Any post operation increases iCurrentPostCount instantly but the actual post completes later on. |
|
758 if( ! Pdd()->PostPending() ) |
|
759 { |
|
760 RequestComplete(RDisplayChannel::EReqWaitForPost, KErrNone); |
|
761 } |
|
762 break; |
|
763 |
|
764 default: |
|
765 __NK_ASSERT_ALWAYS(EFalse); // we already validated the request number |
|
766 } |
|
767 return r; |
|
768 } |
|
769 |
|
770 |
|
771 /** |
|
772 Synchronous requests processing. |
|
773 |
|
774 @param aFunction Request function number, |
|
775 @param apArg1 Pointer to kernel message argument 0. |
|
776 @param apArg2 Pointer to kernel message argument 1. |
|
777 @param aClient Pointer to the client thread that issued the synchronous request. |
|
778 |
|
779 @return request processing result |
|
780 */ |
|
781 TInt DDisplayLdd::DoControl(TInt aFunction, TAny* aArg1, TAny* aArg2, DThread* aClient) |
|
782 { |
|
783 TInt r = KErrNone; |
|
784 TBool changedRot = ETrue; |
|
785 TBufferNode* node = 0; |
|
786 TInt buffer_id; |
|
787 TInt pack[2] = {0,0}; |
|
788 TInt handle, offset; |
|
789 TInt index = 0; |
|
790 |
|
791 RDisplayChannel::TPostCount *postCount ; |
|
792 RDisplayChannel::TDisplayRotation *rotation; |
|
793 |
|
794 TInt *configPack; |
|
795 TInt *bufferId; |
|
796 |
|
797 TBool *rotationChanged; |
|
798 TInt *idx; |
|
799 |
|
800 switch (aFunction) |
|
801 { |
|
802 case RDisplayChannel::ECtrlPostCompositionBuffer: //DFC thread updates a value the client thread should read. |
|
803 postCount = (RDisplayChannel::TPostCount*) aArg2; |
|
804 |
|
805 node = &iCompositionBuffer[iCompositionBuffIdx]; |
|
806 r = Pdd()->PostCompositionBuffer(node); |
|
807 if(r == KErrNone) |
|
808 { |
|
809 ++iCurrentPostCount; |
|
810 *postCount = iCurrentPostCount; |
|
811 } |
|
812 else |
|
813 { |
|
814 r = KErrGeneral; |
|
815 } |
|
816 break; |
|
817 |
|
818 case RDisplayChannel::ECtrlPostLegacyBuffer: //DFC thread updates a value the client thread should read. |
|
819 postCount = (RDisplayChannel::TPostCount*) aArg2; |
|
820 r= Pdd()->PostLegacyBuffer(); |
|
821 if ( r == KErrNone) |
|
822 { |
|
823 ++iCurrentPostCount; |
|
824 *postCount = iCurrentPostCount; |
|
825 } |
|
826 break; |
|
827 |
|
828 case RDisplayChannel::ECtrlRegisterUserBuffer: //DFC thread should read client message data and update a value the client will read. |
|
829 node = FindUserBufferNode(0); |
|
830 if(node) |
|
831 { |
|
832 configPack = (TInt*) aArg1; |
|
833 handle = *configPack; |
|
834 configPack++; |
|
835 offset = *configPack; |
|
836 r = CheckAndOpenUserBuffer(node, handle, offset, aClient); |
|
837 |
|
838 if(r == KErrNone) |
|
839 { |
|
840 bufferId = (TInt*) aArg2; |
|
841 *bufferId = node->iBufferId; |
|
842 } |
|
843 } |
|
844 else |
|
845 { |
|
846 r = KErrTooBig; |
|
847 } |
|
848 break; |
|
849 |
|
850 case RDisplayChannel::ECtrlDeregisterUserBuffer: //DFC thread should read client message data. |
|
851 bufferId = (TInt*) aArg1; |
|
852 buffer_id = *bufferId; |
|
853 |
|
854 |
|
855 r = KErrArgument; |
|
856 if ( (buffer_id > 0) && (buffer_id <= KDisplayUBMax) ) |
|
857 { |
|
858 node = FindUserBufferNode(buffer_id); |
|
859 if(node && (!(node->iFree) && node->iChunk ) ) |
|
860 { |
|
861 if(node->iState==EBufferFree || node->iState==EBufferCompose ) |
|
862 { |
|
863 r = FreeUserBufferNode(node); |
|
864 } |
|
865 else |
|
866 { |
|
867 r = KErrInUse; |
|
868 } |
|
869 } |
|
870 } |
|
871 break; |
|
872 |
|
873 case RDisplayChannel::ECtrlSetRotation: //DFC thread should read client message data and update a value the client will read. |
|
874 { |
|
875 RDisplayChannel::TDisplayRotation rot; |
|
876 RDisplayChannel::TDisplayRotation previousRot = iCurrentRotation; |
|
877 |
|
878 rotation = (RDisplayChannel::TDisplayRotation*) aArg1; |
|
879 rot = *rotation; |
|
880 |
|
881 __DEBUG_PRINT3("ECtrlSetRotation previousRot= %d and rot =%d \n",previousRot, rot ); |
|
882 |
|
883 r = Pdd()->SetRotation(rot); |
|
884 changedRot = (previousRot != iCurrentRotation); |
|
885 if( r == KErrNone) |
|
886 { |
|
887 rotationChanged = (TBool*) aArg2; |
|
888 *rotationChanged = changedRot ; |
|
889 } |
|
890 break; |
|
891 } |
|
892 |
|
893 case RDisplayChannel::ECtrlCurrentRotation: //DFC thread updates a value the client thread should read. |
|
894 rotation = (RDisplayChannel::TDisplayRotation*) aArg1; |
|
895 *rotation = iCurrentRotation; |
|
896 break; |
|
897 |
|
898 case RDisplayChannel::ECtrlGetCompositionBufferInfo: //DFC thread should read client message data and update a value the client will read. |
|
899 idx = ( TInt * ) aArg1; |
|
900 index = *idx; |
|
901 |
|
902 if( (index >= (TInt) iDisplayInfo.iNumCompositionBuffers ) || (index < 0 ) ) |
|
903 { |
|
904 r = KErrArgument; |
|
905 break; |
|
906 } |
|
907 r = Kern::MakeHandleAndOpen(aClient, iCompositionBuffer[index].iChunk); |
|
908 |
|
909 if(r >= KErrNone) |
|
910 { |
|
911 pack[0] = r; |
|
912 pack[1] = iCompositionBuffer[index].iOffset; |
|
913 |
|
914 configPack = (TInt * ) aArg2; |
|
915 *configPack = pack[0]; |
|
916 configPack++; |
|
917 *configPack = pack[1]; |
|
918 |
|
919 r = KErrNone; |
|
920 } |
|
921 break; |
|
922 |
|
923 #ifdef _DEBUG |
|
924 case RDisplayChannel::ECtrlCreateUserBuffer: |
|
925 { |
|
926 TUint32 chunkMapAttr; |
|
927 TLinAddr chunkBase; |
|
928 TPhysAddr physicalAddr; |
|
929 RDisplayChannel::TBufferFormat bufferFormat; |
|
930 |
|
931 // Read the information from the user thread pertaining to the buffer to be allocated |
|
932 Kern::ThreadRawRead(aClient, aArg1, &bufferFormat, sizeof(bufferFormat)); |
|
933 |
|
934 // Allocate a chunk that can be used as a user buffer. Don't worry about the # of bytes |
|
935 // per pixel as this is UDEB only test code - just set it to 4 and that will ensure that |
|
936 // it is large enough |
|
937 TChunkCreateInfo chunkCreateInfo; |
|
938 chunkCreateInfo.iType = TChunkCreateInfo::ESharedKernelSingle; |
|
939 #ifndef __WINS__ |
|
940 chunkCreateInfo.iMapAttr = EMapAttrFullyBlocking; |
|
941 #endif // ! __WINS__ |
|
942 chunkCreateInfo.iOwnsMemory = ETrue; |
|
943 chunkCreateInfo.iDestroyedDfc = NULL; |
|
944 chunkCreateInfo.iMaxSize = (bufferFormat.iSize.iWidth * bufferFormat.iSize.iHeight * 4); |
|
945 |
|
946 if ((r = Kern::ChunkCreate(chunkCreateInfo, iChunk, chunkBase, chunkMapAttr)) == KErrNone) |
|
947 { |
|
948 // Commit some contiguous physical RAM for use in the chunk |
|
949 r = Kern::ChunkCommitContiguous(iChunk, 0, chunkCreateInfo.iMaxSize, physicalAddr); |
|
950 |
|
951 // And open a handle to the chunk that will be returned to user side for use in the user |
|
952 // side's RChunk object |
|
953 if (r == KErrNone) |
|
954 r = Kern::MakeHandleAndOpen(aClient, iChunk); |
|
955 else |
|
956 { |
|
957 Kern::ChunkClose(iChunk); |
|
958 iChunk = NULL; |
|
959 } |
|
960 } |
|
961 |
|
962 break; |
|
963 } |
|
964 #endif // _DEBUG |
|
965 |
|
966 default: |
|
967 __NK_ASSERT_ALWAYS(EFalse); // we already validated the request number |
|
968 }; |
|
969 return r; |
|
970 } |
|
971 |
|
972 |
|
973 /** |
|
974 Open a shared Chunk for the User buffer and then set the appropriate values for the |
|
975 User buffer node attributes. |
|
976 |
|
977 */ |
|
978 TInt DDisplayLdd::CheckAndOpenUserBuffer(TBufferNode* aNode, TInt aHandle, TInt aOffset, DThread* aClient) |
|
979 { |
|
980 |
|
981 TInt size = 0; |
|
982 DChunk* chunk = 0; |
|
983 TLinAddr kernelAddress = 0; |
|
984 TUint32 mapAttr = 0; |
|
985 TUint32 physicalAddress = 0; |
|
986 TUint32 *physicalPageList = 0; |
|
987 TInt r = KErrBadHandle; |
|
988 |
|
989 NKern::ThreadEnterCS(); |
|
990 chunk = Kern::OpenSharedChunk(aClient, aHandle, EFalse); |
|
991 NKern::ThreadLeaveCS(); |
|
992 if(chunk) |
|
993 { |
|
994 |
|
995 // Using iOffsetBetweenLines rather than iWidth as the controller may be using stride |
|
996 size = iDisplayInfo.iNormal.iOffsetBetweenLines * iDisplayInfo.iNormal.iHeight; |
|
997 |
|
998 r = Kern::ChunkPhysicalAddress(chunk, aOffset, size, kernelAddress, mapAttr, physicalAddress, physicalPageList); |
|
999 if( r == KErrNone ) |
|
1000 { |
|
1001 aNode->iChunk = chunk; |
|
1002 aNode->iFree = EFalse; |
|
1003 aNode->iState = EBufferCompose; |
|
1004 aNode->iAddress = (TUint32)kernelAddress; |
|
1005 aNode->iHandle = aHandle; |
|
1006 aNode->iPhysicalAddress = physicalAddress; |
|
1007 } |
|
1008 else |
|
1009 { // we have an error here, close the chunk |
|
1010 r = KErrArgument; |
|
1011 Kern::ChunkClose(chunk); |
|
1012 } |
|
1013 } |
|
1014 return (r); |
|
1015 } |
|
1016 |
|
1017 |
|
1018 /** |
|
1019 Return any free buffer when trying to register a User buffer( aBufferId ==0 ) |
|
1020 or return the specified User buffer( used by Deregister and PostUserBuffer). |
|
1021 In the second case checks about the state of the user buffer are specific to |
|
1022 each case. |
|
1023 |
|
1024 */ |
|
1025 TBufferNode* DDisplayLdd::FindUserBufferNode(TInt aBufferId) |
|
1026 { |
|
1027 TBufferNode* node = 0; |
|
1028 |
|
1029 if(aBufferId == 0) |
|
1030 { |
|
1031 for(TInt i = 0; i < KDisplayUBMax; i++) |
|
1032 { |
|
1033 if(iUserBuffer[i].iFree) |
|
1034 { |
|
1035 node = &iUserBuffer[i]; |
|
1036 break; |
|
1037 } |
|
1038 } |
|
1039 } |
|
1040 else |
|
1041 { |
|
1042 node = &iUserBuffer[aBufferId-1]; |
|
1043 } |
|
1044 return (node); |
|
1045 } |
|
1046 |
|
1047 |
|
1048 /** |
|
1049 Free user buffer by reseting all the appropriate fields and closing the corresponding chunk. |
|
1050 */ |
|
1051 TInt DDisplayLdd::FreeUserBufferNode(TBufferNode* aNode) |
|
1052 { |
|
1053 __DEBUG_PRINT2("FreeUserBufferNode with aNode->iAddress %08x.\n",aNode->iAddress ); |
|
1054 TInt r = KErrNone; |
|
1055 NKern::ThreadEnterCS(); |
|
1056 if(aNode->iChunk != 0) |
|
1057 { |
|
1058 r= Kern::ChunkClose(aNode->iChunk); |
|
1059 } |
|
1060 if( r== KErrNone) |
|
1061 { |
|
1062 aNode->iState = EBufferFree; |
|
1063 aNode->iFree = ETrue; |
|
1064 aNode->iAddress = 0; |
|
1065 aNode->iSize = 0; |
|
1066 aNode->iHandle = 0; |
|
1067 aNode->iChunk = 0; |
|
1068 } |
|
1069 else |
|
1070 { |
|
1071 __DEBUG_PRINT("Failed to close chunk\n"); |
|
1072 } |
|
1073 NKern::ThreadLeaveCS(); |
|
1074 |
|
1075 return r; |
|
1076 } |
|
1077 |
|
1078 |
|
1079 /** |
|
1080 Calls CompleteRequest( which internally calls Kern::QueueRequestComplete )for the specified request and with the reason passed, |
|
1081 in case such an asynchronous request is pending. Called by both the LDD and PDD. |
|
1082 |
|
1083 */ |
|
1084 TInt DDisplayLdd::RequestComplete(TInt aRequest, TInt aReason) |
|
1085 { |
|
1086 TBool flag = EFalse; |
|
1087 |
|
1088 TInt pendingIndex = iPendingIndex[aRequest] ; |
|
1089 |
|
1090 switch (aRequest) |
|
1091 { |
|
1092 case RDisplayChannel::EReqGetCompositionBuffer: |
|
1093 { |
|
1094 __DEBUG_PRINT2("RequestComplete() called with a RDisplayChannel::EReqGetCompositionBuffer request and reason %d\n",aReason ); |
|
1095 |
|
1096 if(iPendingReq[RDisplayChannel::EReqGetCompositionBuffer][pendingIndex].iTClientReq ) |
|
1097 { |
|
1098 if(iPendingReq[RDisplayChannel::EReqGetCompositionBuffer][pendingIndex].iTClientReq->IsReady() ) |
|
1099 { |
|
1100 flag = ETrue; |
|
1101 } |
|
1102 } |
|
1103 break; |
|
1104 } |
|
1105 |
|
1106 case RDisplayChannel::EReqWaitForPost: |
|
1107 { |
|
1108 __DEBUG_PRINT2("RequestComplete() called with a RDisplayChannel::EReqWaitForPost request and reason %d\n",aReason ); |
|
1109 |
|
1110 if(iPendingReq[RDisplayChannel::EReqWaitForPost][pendingIndex].iTClientReq) |
|
1111 { |
|
1112 if( iPendingReq[RDisplayChannel::EReqWaitForPost][pendingIndex].iTClientReq->IsReady() && (iCurrentPostCount >= iRequestedPostCount) ) |
|
1113 { |
|
1114 flag = ETrue; |
|
1115 } |
|
1116 } |
|
1117 break; |
|
1118 } |
|
1119 |
|
1120 case RDisplayChannel::EReqPostUserBuffer: |
|
1121 { |
|
1122 __DEBUG_PRINT2("RequestComplete() called with a RDisplayChannel::EReqPostUserBuffer request and reason %d\n",aReason ); |
|
1123 |
|
1124 if(iPendingReq[RDisplayChannel::EReqPostUserBuffer][pendingIndex].iTClientReq) |
|
1125 { |
|
1126 if( iPendingReq[RDisplayChannel::EReqPostUserBuffer][pendingIndex].iTClientReq->IsReady() ) |
|
1127 { |
|
1128 flag = ETrue; |
|
1129 } |
|
1130 } |
|
1131 break; |
|
1132 } |
|
1133 default: |
|
1134 __DEBUG_PRINT("RequestComplete() called for an unknown request\n"); |
|
1135 return KErrGeneral; |
|
1136 |
|
1137 } |
|
1138 |
|
1139 if (flag) |
|
1140 { |
|
1141 CompleteRequest(iPendingReq[aRequest][pendingIndex].iOwningThread,iPendingReq[aRequest][pendingIndex].iTClientReq,aReason); |
|
1142 } |
|
1143 |
|
1144 return KErrNone; |
|
1145 } |
|
1146 |
|
1147 |
|
1148 /** |
|
1149 Complete an asynchronous request back to the client. |
|
1150 |
|
1151 @param aThread The client thread which issued the request. |
|
1152 @param aTClientReq Pointer reference to the TClientRequest object |
|
1153 @param aReason The request status code. |
|
1154 |
|
1155 @pre The thread must be in a critical section. |
|
1156 */ |
|
1157 void DDisplayLdd::CompleteRequest(DThread* aThread, TClientRequest*& aTClientReq, TInt aReason) |
|
1158 { |
|
1159 __DEBUG_PRINT4("Complete aTClientReq %08x with reason %d for aThread = %08x\n", aTClientReq, aReason,aThread ); |
|
1160 |
|
1161 Kern::QueueRequestComplete(aThread,aTClientReq,aReason); |
|
1162 |
|
1163 aThread->AsyncClose(); // Asynchronously close our reference on the client thread - don't want to be blocked if this is final reference. |
|
1164 |
|
1165 aThread =0; |
|
1166 aTClientReq =0; |
|
1167 |
|
1168 #ifdef _DEBUG |
|
1169 __e32_atomic_add_ord32(&iThreadOpenCount, TUint32(-1)); |
|
1170 __e32_atomic_add_ord32(&iAsyncReqCount, TUint32(-1)); |
|
1171 #endif |
|
1172 |
|
1173 } |
|
1174 |
|
1175 |
|
1176 |
|
1177 /** |
|
1178 static factory function for the LDD. |
|
1179 |
|
1180 @return pointer to the created (or existing) instance of the class |
|
1181 */ |
|
1182 DDisplayLdd* DDisplayLdd::CreateInstance() |
|
1183 { |
|
1184 __DEBUG_PRINT("DDisplayLdd::CreateInstance()\n"); |
|
1185 // create LDD channel instance |
|
1186 DDisplayLdd* obj = new DDisplayLdd(); |
|
1187 return obj; |
|
1188 |
|
1189 } |
|
1190 |
|
1191 |
|
1192 /************************************************************************************ |
|
1193 * LDD factory, DDisplayLddFactory class implementation |
|
1194 ************************************************************************************/ |
|
1195 |
|
1196 /** |
|
1197 Constructor |
|
1198 */ |
|
1199 DDisplayLddFactory::DDisplayLddFactory() |
|
1200 { |
|
1201 __DEBUG_PRINT("DDisplayLddFactory::DDisplayLddFactory() \n"); |
|
1202 |
|
1203 iParseMask = KDeviceAllowPhysicalDevice | KDeviceAllowUnit ; |
|
1204 |
|
1205 iVersion = TVersion( KDisplayChMajorVersionNumber, |
|
1206 KDisplayChMinorVersionNumber, |
|
1207 KDisplayChBuildVersionNumber); |
|
1208 |
|
1209 iUnitsOpenMask =0; |
|
1210 } |
|
1211 |
|
1212 |
|
1213 /** |
|
1214 Destructor |
|
1215 */ |
|
1216 DDisplayLddFactory::~DDisplayLddFactory() |
|
1217 { |
|
1218 } |
|
1219 |
|
1220 |
|
1221 /** |
|
1222 static factory function for the LDD factory. |
|
1223 |
|
1224 @return pointer to the created instance of the class |
|
1225 */ |
|
1226 DDisplayLddFactory* DDisplayLddFactory::CreateInstance() |
|
1227 |
|
1228 { |
|
1229 __DEBUG_PRINT("DDisplayLddFactory::CreateInstance() \n"); |
|
1230 |
|
1231 DDisplayLddFactory* obj = new DDisplayLddFactory; |
|
1232 return obj; |
|
1233 } |
|
1234 |
|
1235 |
|
1236 /** |
|
1237 Set our name and return error code |
|
1238 */ |
|
1239 TInt DDisplayLddFactory::Install() |
|
1240 |
|
1241 { |
|
1242 __DEBUG_PRINT("DDisplayLddFactory::Install() \n"); |
|
1243 return SetName(&RDisplayChannel::Name()); |
|
1244 } |
|
1245 |
|
1246 |
|
1247 void DDisplayLddFactory::GetCaps(TDes8& /*aDes*/) const |
|
1248 |
|
1249 { |
|
1250 //No action. |
|
1251 } |
|
1252 |
|
1253 |
|
1254 /** |
|
1255 LDD factory function. Creates LDD object. |
|
1256 |
|
1257 @param aChannel A pointer to an LDD channel object which will be initialised on return. |
|
1258 |
|
1259 @return KErrNone if object successfully allocated, KErrNoMemory if not. |
|
1260 */ |
|
1261 TInt DDisplayLddFactory::Create(DLogicalChannelBase*& aChannel) |
|
1262 { |
|
1263 __DEBUG_PRINT("DDisplayLddFactory::Create \n"); |
|
1264 aChannel = DDisplayLdd::CreateInstance(); |
|
1265 return (!aChannel)? KErrNoMemory : KErrNone; |
|
1266 } |
|
1267 |
|
1268 |
|
1269 |
|
1270 /** |
|
1271 Check whether a channel is currently open on the specified unit. |
|
1272 @param aUnit The number of the unit to be checked. |
|
1273 @return ETrue if a channel is open on the specified channel, EFalse otherwise. |
|
1274 @pre The unit info. mutex must be held. |
|
1275 */ |
|
1276 TBool DDisplayLddFactory::IsUnitOpen(TInt aUnit) |
|
1277 { |
|
1278 return(iUnitsOpenMask&(1<<aUnit)); |
|
1279 } |
|
1280 |
|
1281 |
|
1282 /** |
|
1283 Attempt to change the state of the channel open status for a particular channel. |
|
1284 @param aUnit The number of the unit to be updated. |
|
1285 @param aIsOpenSetting The required new state for the channel open status: either ETrue to set the status to open or |
|
1286 EFalse to set the status to closed. |
|
1287 @return KErrNone if the status was updated successfully, KErrInUse if an attempt has been made to set the channnel status |
|
1288 to open while it is already open. |
|
1289 */ |
|
1290 TInt DDisplayLddFactory::SetUnitOpen(TInt aUnit,TBool aIsOpenSetting) |
|
1291 { |
|
1292 |
|
1293 NKern::FMWait(&iUnitInfoMutex); // Acquire the unit info. mutex. |
|
1294 |
|
1295 // Fail a request to open an channel that is already open |
|
1296 if (aIsOpenSetting && IsUnitOpen(aUnit)) |
|
1297 { |
|
1298 NKern::FMSignal(&iUnitInfoMutex); // Release the unit info. mutex. |
|
1299 return(KErrInUse); |
|
1300 } |
|
1301 |
|
1302 // Update the open status as requested |
|
1303 if (aIsOpenSetting) |
|
1304 iUnitsOpenMask|=(1<<aUnit); |
|
1305 else |
|
1306 iUnitsOpenMask&=~(1<<aUnit); |
|
1307 |
|
1308 NKern::FMSignal(&iUnitInfoMutex); // Release the unit info. mutex. |
|
1309 return(KErrNone); |
|
1310 } |
|
1311 |
|
1312 |
|
1313 /** |
|
1314 "Standard LDD" entrypoint. |
|
1315 |
|
1316 Is called on CreateLogicalDevice() if the user calls LoadLogicalDevice(). Creates LDD factory. |
|
1317 |
|
1318 @return pointer to the LDD factory object. |
|
1319 */ |
|
1320 DECLARE_STANDARD_LDD() |
|
1321 { |
|
1322 __DEBUG_PRINT("DECLARE_STANDARD_LDD() \n"); |
|
1323 DDisplayLddFactory* pLDDFactory = DDisplayLddFactory::CreateInstance(); |
|
1324 return pLDDFactory; |
|
1325 } |
|
1326 |
|
1327 |
|
1328 |
|
1329 |