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1 // Copyright (c) 2006-2009 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 "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 // |
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15 |
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16 |
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17 #include <kernel/kern_priv.h> |
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18 #include <graphics/surface.h> |
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19 #include <graphics/surfacetypes.h> |
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20 #include <graphics/surfacemanager.h> |
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21 #include "surfacemanager_dev.h" |
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22 #include <kernel/cache.h> |
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23 |
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24 /** |
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25 Convert the surface Id to an index of the array |
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26 based on the least significant 4 bits of the first word of the ID |
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27 @param aSurfaceId Const reference to the surface Id |
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28 @internalTechnology |
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29 */ |
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30 static TInt SurfaceIdToIndex(const TSurfaceId& aSurfaceId) |
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31 { |
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32 return static_cast<TInt>(aSurfaceId.iInternal[0]&(KMaxLists-1)); |
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33 } |
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34 |
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35 /** |
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36 Removes an item from a linked list |
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37 @param aList Pointer to the head of a linked list of type T |
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38 @param aOwner Pointer to the object to be removed |
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39 @internalTechnology |
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40 */ |
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41 template<class T> |
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42 static void UnlinkListItem(T** aList, const T* aItem) |
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43 { |
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44 TRACE(Kern::Printf("SM UnlinkListItem list %08x object %08x \n", aList, aItem);) |
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45 |
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46 __ASSERT_DEBUG(aItem != NULL, Kern::Fault("Surface Manager", __LINE__)); |
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47 __ASSERT_DEBUG(*aList != NULL, Kern::Fault("Surface Manager", __LINE__)); |
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48 |
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49 if (*aList == aItem) //one we want is at the head of the list |
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50 { |
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51 *aList = aItem->iNext; |
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52 return; |
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53 } |
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54 |
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55 T* p = *aList; |
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56 T* q = (*aList)->iNext; |
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57 while (q) |
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58 { |
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59 if (q == aItem) |
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60 { |
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61 p->iNext = q->iNext; |
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62 return; |
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63 } |
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64 p = q; |
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65 q = q->iNext; |
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66 } |
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67 } |
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68 |
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69 |
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70 |
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71 |
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72 /** |
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73 Returns a pointer to the surface owner object for the specified process, for this surface. |
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74 @param aProcess Pointer to the process object |
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75 @return pointer to the surface owner object if found, else NULL |
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76 @internalTechnology |
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77 */ |
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78 |
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79 TProcessListItem* TSurface::ProcessOwnerInfo(const DProcess* aProcess) |
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80 { |
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81 TProcessListItem* so = iOwners; |
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82 while(so) |
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83 { |
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84 if (aProcess == so->iOwningProcess) |
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85 { |
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86 break; |
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87 } |
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88 so = so->iNext; |
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89 } |
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90 return so; |
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91 } |
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92 |
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93 /** |
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94 Creates a shared chunk surface. |
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95 @param aParams Package buffer containing the surface creation parameters. |
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96 @param aId Will be set to the surface id of the newly created surface. |
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97 @return KErrNone if successful, KErrArgument if the creation attributes were incorrect, |
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98 otherwise one of the other system wide error codes. |
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99 @see RSurfaceManager::TSurfaceCreationAttributes |
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100 @internalTechnology |
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101 */ |
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102 |
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103 TInt DSurfaceManager::CreateSurface(const TDesC8* aParams, TSurfaceId* aId) |
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104 { |
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105 |
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106 RSurfaceManager::TSurfaceCreationAttributesBuf buf; |
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107 RSurfaceManager::TSurfaceCreationAttributes& attribs = buf(); |
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108 |
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109 Kern::KUDesGet(buf, *aParams); //fetch input parameters |
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110 if( (attribs.iHintCount > KMaxHintsPerSurface) || (attribs.iHintCount<0) ) |
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111 { |
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112 return KErrArgument; |
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113 } |
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114 |
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115 RSurfaceManager::THintPair tempSurfaceHints[KMaxHintsPerSurface]; |
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116 if( (attribs.iHintCount>0) && attribs.iSurfaceHints) |
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117 { |
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118 kumemget(tempSurfaceHints, attribs.iSurfaceHints, attribs.iHintCount*sizeof(RSurfaceManager::THintPair)); |
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119 attribs.iSurfaceHints = tempSurfaceHints; |
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120 } |
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121 else |
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122 { |
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123 attribs.iSurfaceHints=NULL; |
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124 } |
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125 |
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126 //validate input parameters and calculate chunk size |
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127 TInt roundedBufferSize = attribs.iOffsetBetweenBuffers; |
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128 TUint dummyActualSize = 0; |
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129 |
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130 TInt chunkSize = ValidateAndCalculateChunkSize(attribs, roundedBufferSize, dummyActualSize, ETrue); |
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131 if (chunkSize == 0) |
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132 { |
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133 return KErrArgument; |
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134 } |
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135 |
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136 TSurfaceId sid; |
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137 TInt r = KErrNone; |
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138 TSurface* surface = NULL; |
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139 do //in the unlikely event that we generate a duplicate surface id, try again. |
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140 { |
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141 GenerateSurfaceId(sid); |
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142 |
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143 NKern::FMWait(&iMutex); |
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144 surface = FindSurfaceById(sid); |
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145 NKern::FMSignal(&iMutex); |
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146 } |
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147 while (surface); |
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148 |
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149 //create a shared chunk for the surface memory |
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150 TChunkCreateInfo info; |
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151 info.iType = TChunkCreateInfo::ESharedKernelMultiple; //multi process mappable |
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152 info.iMaxSize = chunkSize; |
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153 info.iOwnsMemory = ETrue; |
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154 |
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155 //iMapAttr is valid only for hardware devices and will not make any effect in wins |
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156 #ifndef __WINS__ |
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157 info.iMapAttr = (attribs.iCacheAttrib == RSurfaceManager::ECached) ? EMapAttrCachedMax : EMapAttrL1Uncached; |
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158 #else |
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159 info.iMapAttr = 0; |
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160 #endif |
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161 |
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162 TLinAddr kernAddr; |
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163 TUint32 mapAttr; |
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164 |
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165 NKern::ThreadEnterCS(); |
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166 DChunk* chunk; |
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167 r = Kern::ChunkCreate(info, chunk, kernAddr, mapAttr); |
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168 if (KErrNone != r) |
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169 { |
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170 NKern::ThreadLeaveCS(); |
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171 return r; |
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172 } |
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173 |
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174 //commit the memory |
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175 TUint32 paddr; |
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176 if (attribs.iContiguous) |
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177 { |
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178 r = Kern::ChunkCommitContiguous(chunk, 0, chunkSize, paddr); |
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179 } |
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180 else |
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181 { |
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182 r = Kern::ChunkCommit(chunk, 0, chunkSize); |
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183 } |
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184 |
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185 if (KErrNone != r) |
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186 { |
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187 //problem committing the memory, |
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188 //destroy the chunk and cleanup |
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189 Kern::ChunkClose(chunk); |
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190 NKern::ThreadLeaveCS(); |
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191 return r; |
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192 } |
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193 |
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194 //create a surface structure for the new surface |
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195 surface = new TSurface; |
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196 TRACE(Kern::Printf("SM A %08x TSurface CreateSurface",surface);) |
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197 if (!surface) |
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198 { |
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199 //destroy the chunk and cleanup, out of memory |
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200 Kern::ChunkClose(chunk); |
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201 NKern::ThreadLeaveCS(); |
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202 return KErrNoMemory; |
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203 } |
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204 |
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205 surface->iId = sid; |
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206 surface->iSize = attribs.iSize; |
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207 surface->iBuffers = attribs.iBuffers; |
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208 surface->iPixelFormat = attribs.iPixelFormat; |
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209 surface->iStride = attribs.iStride; |
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210 surface->iOffsetToFirstBuffer = attribs.iOffsetToFirstBuffer; |
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211 surface->iAlignment = attribs.iAlignment; |
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212 surface->iContiguous = attribs.iContiguous; |
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213 surface->iChunk = chunk; |
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214 surface->iOffsetBetweenBuffers = roundedBufferSize; |
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215 surface->iCacheAttrib = attribs.iCacheAttrib; |
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216 surface->iMappable = attribs.iMappable; |
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217 if(attribs.iHintCount>0) |
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218 { |
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219 memcpy(surface->iSurfaceHints,tempSurfaceHints,attribs.iHintCount*sizeof(RSurfaceManager::THintPair)); |
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220 } |
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221 memclr(surface->iSurfaceHints+attribs.iHintCount, (KMaxHintsPerSurface-attribs.iHintCount)*sizeof(RSurfaceManager::THintPair)); |
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222 |
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223 //create a surface owner for this surface |
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224 TProcessListItem* owner = new TProcessListItem; |
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225 TRACE(Kern::Printf("SM A %08x TProcessListItem CreateSurface",owner);) |
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226 |
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227 if (!owner) |
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228 { |
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229 //destroy the chunk and cleanup, out of memory |
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230 Kern::ChunkClose(chunk); |
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231 delete(surface); |
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232 TRACE(Kern::Printf("SM D %08x TSurface CreateSurface",surface);) |
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233 NKern::ThreadLeaveCS(); |
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234 return KErrNoMemory; |
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235 } |
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236 |
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237 owner->iCount = 1; //mark it as open in this process |
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238 owner->iOwningProcess = &Kern::CurrentProcess(); |
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239 owner->iNext = NULL; |
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240 |
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241 surface->iOwners = owner; //only 1 owner at creation time |
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242 |
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243 //at this point we have a fully constructed TSurface |
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244 |
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245 //add surface to head of surfaces list |
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246 NKern::FMWait(&iMutex); |
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247 //Mask off the bottom log2(KMaxLists) bits of the first word of the surfaceID as an index |
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248 //add the new surface to the beginning of the list |
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249 TInt index = SurfaceIdToIndex(sid); |
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250 surface->iNext = iSurfacesIndex[index]; |
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251 iSurfacesIndex[index] = surface; |
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252 |
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253 NKern::FMSignal(&iMutex); |
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254 NKern::ThreadLeaveCS(); |
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255 |
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256 //write surface id back to user side |
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257 kumemput(aId, &sid, sizeof (TSurfaceId)); |
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258 return KErrNone; |
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259 } |
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260 |
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261 |
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262 /** |
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263 Validate that a chunk contains physical memory for the used areas. |
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264 |
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265 This function should be called in Critical Section in order to be completed even if the thread |
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266 or process is killed and so be able to free the memory allocated (TUint32[pageList]) |
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267 |
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268 @param aChunk Chunk that the user supplied. |
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269 @param aAttribs Surface Creation Attributes. |
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270 @param aBuffersize Calculated size of each buffer. |
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271 @param aMapAttr Filled in with the mapping attributes of the memory. |
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272 @param aIsContiguous Lets the caller know if the surface is physically contiguous or not. |
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273 @return KErrNone if successful, KErrArgument if the creation attributes were incorrect, |
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274 KErrBadHandle if aChunkHandle is of an invalid shared chunk memory, |
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275 otherwise one of the other system wide error codes. |
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276 @see RSurfaceManager::TSurfaceCreationAttributes |
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277 @internalTechnology |
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278 */ |
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279 TInt DSurfaceManager::ValidatePhysicalMemory(DChunk* aChunk, const RSurfaceManager::TSurfaceCreationAttributes& aAttribs, |
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280 TUint aBuffersize, TUint32& aMapAttr, TBool &aIsContiguous) |
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281 { |
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282 TLinAddr kernAddr; |
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283 TUint32 physAddr; |
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284 |
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285 //Get the physical address for a region in a shared chunk |
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286 TInt pageSize = Kern::RoundToPageSize(1); |
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287 TInt pageList = 1 + (aChunk->iSize + pageSize - 2) / pageSize; |
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288 TUint32* physAddr2 = new TUint32[pageList]; |
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289 if(!physAddr2) |
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290 { |
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291 return KErrNoMemory; |
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292 } |
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293 |
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294 // Unless proven otherwise, the memory is not contiguous. |
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295 aIsContiguous = EFalse; |
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296 TInt r = Kern::ChunkPhysicalAddress(aChunk, 0, aChunk->iSize, kernAddr, aMapAttr, physAddr, physAddr2); |
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297 if (KErrNone == r) |
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298 { |
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299 aIsContiguous = ETrue; |
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300 } |
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301 |
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302 |
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303 TRACE(Kern::Printf("SM CreateSurface ChunkPhysicalAddress r %d chunk %08x chunk size %d", r, aChunk, aChunk->iSize);) |
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304 TRACE(Kern::Printf("SM CreateSurface kernAddr %08x", kernAddr);) |
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305 TRACE(Kern::Printf("SM CreateSurface mapAttr %08x", aMapAttr);) |
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306 TRACE(Kern::Printf("SM CreateSurface physAddr %08x", physAddr);) |
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307 TRACE(Kern::Printf("SM CreateSurface physAddr2 %08x", physAddr2);) |
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308 |
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309 if(r < KErrNone) |
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310 { |
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311 // Error means that there isn't memory in the whole chunk - so check the |
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312 // relevant areas - it is allowed to have gaps between the buffers, but not |
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313 // within the actual regions that are used for buffers. |
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314 |
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315 // So, we first check the area before first buffer up to "offsettofirstbuffer", which all should be valid |
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316 if (aAttribs.iOffsetToFirstBuffer != 0) |
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317 { |
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318 r = Kern::ChunkPhysicalAddress(aChunk, 0, aAttribs.iOffsetToFirstBuffer, |
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319 kernAddr, aMapAttr, physAddr, physAddr2); |
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320 } |
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321 else |
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322 { |
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323 r = KErrNone; |
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324 } |
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325 |
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326 // If that's a pass, loop through and check the actual buffers (leave loop if it fails). |
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327 for(TInt i = 0; i < aAttribs.iBuffers && KErrNone <= r; i++) |
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328 { |
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329 r = Kern::ChunkPhysicalAddress(aChunk, |
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330 aAttribs.iOffsetToFirstBuffer + aAttribs.iOffsetBetweenBuffers * i, |
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331 aBuffersize, kernAddr, aMapAttr, physAddr, physAddr2); |
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332 } |
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333 } |
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334 |
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335 // Fix up weird ChunkPhysicalAddress behaviour - it returns 1 to indicate that memory is non-contiguous. |
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336 if (1 == r) |
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337 { |
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338 r = KErrNone; |
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339 } |
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340 |
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341 delete[] physAddr2; |
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342 return r; |
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343 } |
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344 |
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345 |
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346 /** |
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347 Creates a surface in an existing shared chunk. |
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348 @param aParam Package buf containing the surface creation parameters and id to be set to the surface id of the newly created surface. |
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349 @param aChunkHandle Existing valid shared chunk handle. |
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350 @return KErrNone if successful, KErrArgument if the creation attributes were incorrect, |
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351 KErrBadHandle if aChunkHandle is of an invalid shared chunk memory, |
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352 otherwise one of the other system wide error codes. |
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353 @see RSurfaceManager::TSurfaceCreationAttributes |
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354 @internalTechnology |
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355 */ |
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356 TInt DSurfaceManager::CreateSurface(RSurfaceManagerDriver::TDeviceParam* aParam, TInt aChunkHandle) |
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357 { |
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358 RSurfaceManager::TSurfaceCreationAttributesBuf buf; |
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359 RSurfaceManager::TSurfaceCreationAttributes& attribs = buf(); |
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360 |
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361 //Get the input parameters |
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362 RSurfaceManagerDriver::TDeviceParam param; |
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363 kumemget(¶m, aParam, sizeof(RSurfaceManagerDriver::TDeviceParam)); |
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364 Kern::KUDesGet(buf, *(reinterpret_cast<const TDesC8*>(param.iBuffer))); |
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365 if( (attribs.iHintCount > KMaxHintsPerSurface) || (attribs.iHintCount<0) ) |
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366 { |
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367 return KErrArgument; |
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368 } |
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369 |
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370 RSurfaceManager::THintPair tempSurfaceHints[KMaxHintsPerSurface]; |
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371 if( (attribs.iHintCount>0) && attribs.iSurfaceHints) |
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372 { |
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373 kumemget(tempSurfaceHints, attribs.iSurfaceHints, attribs.iHintCount*sizeof(RSurfaceManager::THintPair)); |
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374 attribs.iSurfaceHints = tempSurfaceHints; |
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375 } |
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376 else |
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377 { |
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378 attribs.iSurfaceHints=NULL; |
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379 } |
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380 |
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381 //validate input parameters and calc size |
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382 TInt roundedBufferSize = attribs.iOffsetBetweenBuffers; |
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383 TUint actualBufferSize = 0; |
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384 TInt chunkSize = ValidateAndCalculateChunkSize(attribs, roundedBufferSize, actualBufferSize); |
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385 if (chunkSize == 0) |
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386 { |
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387 return KErrArgument; |
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388 } |
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389 |
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390 NKern::ThreadEnterCS(); |
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391 |
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392 //Open an existing shared chunk |
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393 DChunk* chunk = Kern::OpenSharedChunk(NULL, aChunkHandle, EFalse); |
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394 if(chunk == NULL) |
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395 { |
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396 NKern::ThreadLeaveCS(); |
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397 return KErrBadHandle; |
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398 } |
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399 |
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400 //Check for chunk type as kernel multiple |
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401 if(chunk->iChunkType != ESharedKernelMultiple) |
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402 { |
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403 Kern::ChunkClose(chunk); |
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404 NKern::ThreadLeaveCS(); |
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405 return KErrBadHandle; |
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406 } |
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407 |
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408 //Check for enough chunk size to create surface for requested attributes |
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409 if (chunk->iSize < attribs.iOffsetToFirstBuffer + attribs.iBuffers * actualBufferSize) |
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410 { |
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411 Kern::ChunkClose(chunk); |
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412 NKern::ThreadLeaveCS(); |
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413 return KErrArgument; |
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414 } |
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415 |
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416 TSurfaceId sid; |
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417 TSurface* surface = NULL; |
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418 do //in the unlikely event that we generate a duplicate surface id, try again. |
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419 { |
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420 GenerateSurfaceId(sid); |
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421 |
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422 NKern::FMWait(&iMutex); |
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423 surface = FindSurfaceById(sid); |
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424 NKern::FMSignal(&iMutex); |
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425 } |
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426 while (surface); |
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427 |
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428 //create a surface structure for the new surface |
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429 surface = new TSurface; |
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430 TRACE(Kern::Printf("SM A %08x TSurface CreateSurface",surface);) |
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431 if (!surface) |
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432 { |
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433 //destroy the chunk and cleanup, out of memory |
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434 Kern::ChunkClose(chunk); |
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435 NKern::ThreadLeaveCS(); |
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436 return KErrNoMemory; |
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437 } |
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438 |
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439 TUint32 mapAttr = 0; |
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440 TBool isContiguous; |
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441 TInt r = ValidatePhysicalMemory(chunk, attribs, actualBufferSize, mapAttr, isContiguous); |
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442 if (r != KErrNone) |
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443 { |
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444 //destroy the surface and close the chunk |
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445 delete(surface); |
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446 Kern::ChunkClose(chunk); |
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447 NKern::ThreadLeaveCS(); |
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448 if (r != KErrNoMemory) |
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449 { |
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450 r = KErrArgument; |
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451 } |
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452 return r; |
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453 } |
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454 |
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455 surface->iId = sid; |
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456 surface->iSize = attribs.iSize; |
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457 surface->iBuffers = attribs.iBuffers; |
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458 surface->iPixelFormat = attribs.iPixelFormat; |
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459 surface->iStride = attribs.iStride; |
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460 surface->iOffsetToFirstBuffer = attribs.iOffsetToFirstBuffer; |
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461 surface->iAlignment = attribs.iAlignment; |
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462 surface->iContiguous = isContiguous; |
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463 surface->iChunk = chunk; |
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464 surface->iOffsetBetweenBuffers = (attribs.iOffsetBetweenBuffers) ? attribs.iOffsetBetweenBuffers : roundedBufferSize; |
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465 surface->iMappable = attribs.iMappable; |
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466 #ifndef __WINS__ //Creation attribute field will not considered for iCacheAttrib |
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467 TUint32 level1Info = mapAttr & EMapAttrL1CacheMask; |
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468 TUint32 level2Info = mapAttr & EMapAttrL2CacheMask; |
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469 TBool chunkIsNotcached = ((level2Info == EMapAttrL2Uncached) && |
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470 ((level1Info == EMapAttrFullyBlocking) || (level1Info == EMapAttrBufferedNC) || |
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471 (level1Info == EMapAttrBufferedC) || (level1Info == EMapAttrL1Uncached))); |
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472 surface->iCacheAttrib = (chunkIsNotcached) ? RSurfaceManager::ENotCached : RSurfaceManager::ECached; |
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473 #else |
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474 surface->iCacheAttrib = RSurfaceManager::ENotCached; |
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475 #endif |
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476 |
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477 if(attribs.iHintCount>0) |
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478 { |
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479 memcpy(surface->iSurfaceHints,tempSurfaceHints,attribs.iHintCount*sizeof(RSurfaceManager::THintPair)); |
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480 } |
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481 memclr(surface->iSurfaceHints+attribs.iHintCount, (KMaxHintsPerSurface-attribs.iHintCount)*sizeof(RSurfaceManager::THintPair)); |
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482 |
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483 //create a surface owner for this surface |
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484 TProcessListItem* owner = new TProcessListItem; |
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485 TRACE(Kern::Printf("SM A %08x TProcessListItem CreateSurface",owner);) |
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486 |
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487 if (!owner) |
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488 { |
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489 //destroy the chunk and cleanup, out of memory |
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490 Kern::ChunkClose(chunk); |
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491 delete(surface); |
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492 TRACE(Kern::Printf("SM D %08x TSurface CreateSurface",surface);) |
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493 NKern::ThreadLeaveCS(); |
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494 return KErrNoMemory; |
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495 } |
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496 |
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497 owner->iCount = 1; //mark it as open in this process |
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498 owner->iOwningProcess = &Kern::CurrentProcess(); |
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499 owner->iNext = NULL; |
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500 |
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501 surface->iOwners = owner; //only 1 owner at creation time |
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502 |
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503 NKern::FMWait(&iMutex); |
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504 //at this point we have a fully constructed TSurface |
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505 //add surface to head of surfaces list |
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506 |
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507 //Mask off the bottom log2(KMaxLists) bits of the first word of the surfaceID as an index |
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508 //add the new surface to the beginning of the list |
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509 TInt index = SurfaceIdToIndex(sid); |
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510 surface->iNext = iSurfacesIndex[index]; |
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511 iSurfacesIndex[index] = surface; |
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512 NKern::FMSignal(&iMutex); |
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513 NKern::ThreadLeaveCS(); |
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514 |
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515 //write surface id back to user side |
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516 kumemput(reinterpret_cast<TSurfaceId*>(param.iSurfaceId), &sid, sizeof (TSurfaceId)); |
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517 return KErrNone; |
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518 } |
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519 |
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520 |
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521 /** |
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522 Opens a surface. If the current process already is in the owners list, its usage count is |
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523 incremented. If this is an open from a different process, a new surface owner object is added |
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524 to the surface's list of owners and its usage count is set to 1. |
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525 @param aId The surface id of the surface to be opened. |
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526 @return KErrNone if successful, otherwise a system error code |
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527 @internalTechnology |
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528 */ |
|
529 TInt DSurfaceManager::OpenSurface(const TSurfaceId* aId) |
|
530 { |
|
531 TSurfaceId sid; |
|
532 //fetch surface id from user memory |
|
533 kumemget(&sid, aId, sizeof (TSurfaceId)); |
|
534 NKern::ThreadEnterCS(); |
|
535 TProcessListItem* owner = new TProcessListItem; //speculative creation |
|
536 TRACE(Kern::Printf("SM A %08x TProcessListItem OpenSurface", owner);) |
|
537 |
|
538 NKern::FMWait(&iMutex); |
|
539 //look it up |
|
540 TSurface* surface = FindSurfaceById(sid); |
|
541 if (!surface) |
|
542 { |
|
543 NKern::FMSignal(&iMutex); |
|
544 delete owner; //free the memory just allocated |
|
545 TRACE(Kern::Printf("SM D %08x TProcessListItem OpenSurface", owner);) |
|
546 NKern::ThreadLeaveCS(); |
|
547 return KErrArgument; |
|
548 } |
|
549 |
|
550 //find the owner |
|
551 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
552 if (so) |
|
553 { |
|
554 //already an owner so inc the ref count |
|
555 ++so->iCount; |
|
556 } |
|
557 else |
|
558 { |
|
559 //new process trying to open it |
|
560 if (!owner) |
|
561 { |
|
562 //the creation of the owner information object failed, out of memory |
|
563 NKern::FMSignal(&iMutex); |
|
564 NKern::ThreadLeaveCS(); |
|
565 return KErrNoMemory; |
|
566 } |
|
567 |
|
568 owner->iCount = 1; //mark it open in this process |
|
569 owner->iOwningProcess = &Kern::CurrentProcess(); |
|
570 |
|
571 //add the owner to the list of owners |
|
572 owner->iNext = surface->iOwners; |
|
573 surface->iOwners = owner; |
|
574 owner = NULL; |
|
575 } |
|
576 NKern::FMSignal(&iMutex); |
|
577 delete owner; //free if not used. |
|
578 TRACE(Kern::Printf("SM D %08x TProcessListItem OpenSurface", owner);) |
|
579 NKern::ThreadLeaveCS(); |
|
580 return KErrNone; |
|
581 } |
|
582 |
|
583 |
|
584 |
|
585 /** |
|
586 Closes a surface. Decrements the usage count in the surface owner object |
|
587 if the usage count is then zero, removes this surface owner from the surface. |
|
588 If this results in a surface with no owners, the surface is deleted and the |
|
589 surface shared chunk is closed. |
|
590 @param aId The id of the surface to be closed |
|
591 @return KErrNone if successful, KErrArgument if the surface ID does not refer to a surface, |
|
592 KErrAccessDenied if the surface is not open in the current process, otherwise a system wide |
|
593 error code. |
|
594 @internalTechnology |
|
595 */ |
|
596 TInt DSurfaceManager::CloseSurface(const TSurfaceId* aId) |
|
597 { |
|
598 |
|
599 TSurfaceId sid; |
|
600 kumemget(&sid, aId, sizeof (TSurfaceId)); //fetch surface id from user memory |
|
601 //look it up |
|
602 NKern::ThreadEnterCS(); |
|
603 NKern::FMWait(&iMutex); |
|
604 TSurface* surface = FindSurfaceById(sid); |
|
605 if (!surface) |
|
606 { |
|
607 NKern::FMSignal(&iMutex); |
|
608 NKern::ThreadLeaveCS(); |
|
609 return KErrArgument; |
|
610 } |
|
611 |
|
612 //find the owner |
|
613 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
614 if (!so) |
|
615 { |
|
616 NKern::FMSignal(&iMutex); |
|
617 NKern::ThreadLeaveCS(); |
|
618 return KErrAccessDenied; |
|
619 } |
|
620 |
|
621 //current process is a surface owner so decrement the open count |
|
622 TSurface* surfaceToDelete = NULL; |
|
623 TProcessListItem* ownerToDelete = NULL; |
|
624 DChunk* chunkToClose = NULL; |
|
625 if (--so->iCount == 0) |
|
626 { |
|
627 //if count is now zero remove the owner |
|
628 //surface->RemoveOwner(so); |
|
629 UnlinkListItem(&surface->iOwners, so); |
|
630 ownerToDelete = so; |
|
631 |
|
632 //check to see if the surface has any owners |
|
633 if (!surface->iOwners) |
|
634 { |
|
635 //no more owners of the surface |
|
636 chunkToClose = surface->iChunk; |
|
637 |
|
638 //remove the surface from the list |
|
639 UnlinkListItem(&(iSurfacesIndex[SurfaceIdToIndex(surface->iId)]), surface); |
|
640 surfaceToDelete = surface; |
|
641 } |
|
642 } |
|
643 |
|
644 NKern::FMSignal(&iMutex); |
|
645 |
|
646 if (chunkToClose) |
|
647 { |
|
648 //surface has no more owners so close the chunk |
|
649 Kern::ChunkClose(chunkToClose); |
|
650 } |
|
651 |
|
652 delete surfaceToDelete; |
|
653 TRACE(Kern::Printf("SM D %08x TSurface CloseSurface",surfaceToDelete);) |
|
654 delete ownerToDelete; |
|
655 TRACE(Kern::Printf("SM D %08x TProcessListItem CloseSurface",ownerToDelete);) |
|
656 NKern::ThreadLeaveCS(); |
|
657 |
|
658 return KErrNone; |
|
659 } |
|
660 |
|
661 |
|
662 /** |
|
663 Maps the surface memory into the process of the calling thread. This will fail if |
|
664 the surface is not open in this process, or if the handle to the chunk cannot be created. |
|
665 @param aId The id of the surface to be mapped in. |
|
666 @return KErrNone if successful, KErrArgument if the surface ID does not refer to a |
|
667 surface, KErrAccessDenied if the surface is not open in the current process, |
|
668 KErrNotSupported if the surface is not mappable, KErrOverflow if the chunk limit has been |
|
669 exceeded in the moving memory model, otherwise a system wide error code. |
|
670 @internalTechnology |
|
671 */ |
|
672 TInt DSurfaceManager::MapSurface(const TSurfaceId* aId) |
|
673 { |
|
674 TSurfaceId sid; |
|
675 kumemget(&sid, aId, sizeof (TSurfaceId)); //fetch surface id from user memory |
|
676 |
|
677 //look it up |
|
678 NKern::ThreadEnterCS(); |
|
679 NKern::FMWait(&iMutex); |
|
680 TSurface* surface = FindSurfaceById(sid); |
|
681 if (!surface) |
|
682 { |
|
683 NKern::FMSignal(&iMutex); |
|
684 NKern::ThreadLeaveCS(); |
|
685 return KErrArgument; //surface id is not valid or in the list of surfaces |
|
686 } |
|
687 if(!surface->iMappable) |
|
688 { |
|
689 NKern::FMSignal(&iMutex); |
|
690 NKern::ThreadLeaveCS(); |
|
691 return KErrNotSupported; |
|
692 } |
|
693 |
|
694 //find the owner |
|
695 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
696 if (!so) |
|
697 { |
|
698 NKern::FMSignal(&iMutex); |
|
699 NKern::ThreadLeaveCS(); |
|
700 return KErrAccessDenied; //can't map it in, it's not open in this process |
|
701 } |
|
702 |
|
703 DChunk* chunk = surface->iChunk; |
|
704 TInt r = chunk->Open(); |
|
705 NKern::FMSignal(&iMutex); |
|
706 TRACE(Kern::Printf("SM MapSurface chunk open r %d\n",r);) |
|
707 |
|
708 if (r == KErrGeneral) |
|
709 { |
|
710 NKern::ThreadLeaveCS(); |
|
711 return KErrAccessDenied; |
|
712 } |
|
713 |
|
714 //if we are here, got the surface and we are the owner. |
|
715 //if we are the owner we must have it open at least once |
|
716 |
|
717 r = Kern::MakeHandleAndOpen(NULL, chunk); |
|
718 chunk->Close(NULL); |
|
719 TRACE(Kern::Printf("SM MapSurface handle open r: %d\n",r);) |
|
720 |
|
721 NKern::ThreadLeaveCS(); |
|
722 |
|
723 return r; |
|
724 } |
|
725 |
|
726 |
|
727 /** |
|
728 Record a new connection to the driver. |
|
729 Adds an element to the reference counted list of connected processes if the connection |
|
730 is from a new process, otherwise it increments the reference count. |
|
731 @param aProcess The process which has opened a driver channel. |
|
732 @internalTechnology |
|
733 */ |
|
734 TInt DSurfaceManager::AddConnection(const DProcess* aProcess) |
|
735 { |
|
736 TRACE(Kern::Printf("SM AddConnection process %08x\n", aProcess);) |
|
737 NKern::ThreadEnterCS(); |
|
738 TProcessListItem* connectedProcess = new TProcessListItem; //speculative creation |
|
739 TRACE(Kern::Printf("SM A %08x TProcessListItem AddConnection", connectedProcess);) |
|
740 NKern::FMWait(&iMutex); |
|
741 TProcessListItem* p = FindConnectedProcess(aProcess); |
|
742 if (p) //already connected, found the process |
|
743 { |
|
744 ++p->iCount; |
|
745 } |
|
746 else |
|
747 { |
|
748 //add a new connected process |
|
749 if (!connectedProcess) |
|
750 { |
|
751 //the creation of the owner information object failed, out of memory |
|
752 NKern::FMSignal(&iMutex); |
|
753 NKern::ThreadLeaveCS(); |
|
754 return KErrNoMemory; |
|
755 } |
|
756 connectedProcess->iOwningProcess = (DProcess*)aProcess; |
|
757 connectedProcess->iCount=1; |
|
758 |
|
759 connectedProcess->iNext = iConnectedProcesses; |
|
760 iConnectedProcesses = connectedProcess; |
|
761 connectedProcess = NULL; |
|
762 } |
|
763 NKern::FMSignal(&iMutex); |
|
764 delete connectedProcess; |
|
765 TRACE(Kern::Printf("SM D %08x TProcessListItem AddConnection", connectedProcess);) |
|
766 NKern::ThreadLeaveCS(); |
|
767 return KErrNone; |
|
768 } |
|
769 |
|
770 |
|
771 |
|
772 /** |
|
773 Called when the driver channel is closed. |
|
774 Decrements the reference count for the connected process, if the last connection |
|
775 for this process is closed (reference count reaches 0) it removes the process from the list. |
|
776 @param aProcess The process which has closed the driver channel. |
|
777 @internalTechnology |
|
778 */ |
|
779 void DSurfaceManager::RemoveConnection(const DProcess* aProcess) |
|
780 { |
|
781 TRACE(Kern::Printf("SM RemoveConnection process %08x\n", aProcess);) |
|
782 NKern::ThreadEnterCS(); |
|
783 NKern::FMWait(&iMutex); |
|
784 TProcessListItem* p =FindConnectedProcess(aProcess); |
|
785 TProcessListItem* toDelete = NULL; |
|
786 if (p) //already connected, found the process |
|
787 { |
|
788 if (--p->iCount == 0) //last connection in process has disconnected |
|
789 { |
|
790 //remove the process from the list and cleanup |
|
791 UnlinkListItem(&iConnectedProcesses, p); |
|
792 toDelete = p; |
|
793 } |
|
794 } |
|
795 NKern::FMSignal(&iMutex); |
|
796 delete toDelete; |
|
797 TRACE(Kern::Printf("SM D %08x TProcessListItem RemoveConnection ", toDelete);) |
|
798 |
|
799 |
|
800 if (toDelete) // if a process has closed its last channel, remove process from the surface owners. |
|
801 { |
|
802 CloseSurfaceHandlesForProcess(aProcess); |
|
803 } |
|
804 |
|
805 NKern::ThreadLeaveCS(); |
|
806 } |
|
807 |
|
808 |
|
809 |
|
810 |
|
811 /** |
|
812 Closes all the surfaces belonging to the process which has just terminated. |
|
813 If this is the only owner of a surface, delete the surface. |
|
814 @param aProcess The process which has terminated. |
|
815 @pre must be called in critical section |
|
816 @internalTechnology |
|
817 */ |
|
818 void DSurfaceManager::CloseSurfaceHandlesForProcess(const DProcess* aProcess) |
|
819 { |
|
820 |
|
821 NKern::FMWait(&iMutex); |
|
822 |
|
823 TSurface* p = NULL; |
|
824 TSurface* surfacesTodelete = NULL; |
|
825 TProcessListItem* ownersTodelete = NULL; |
|
826 TProcessListItem* so; |
|
827 // There are 16 doubly linked lists managed by Surface Manager |
|
828 for (TInt index = 0; index < KMaxLists; index++) |
|
829 { |
|
830 p = iSurfacesIndex[index]; |
|
831 while(p) |
|
832 { |
|
833 //see if the process which has just died is an owner of any surfaces |
|
834 TSurface* surface = p; |
|
835 p=p->iNext; |
|
836 so = surface->ProcessOwnerInfo(aProcess); |
|
837 if (so) |
|
838 { |
|
839 UnlinkListItem(&surface->iOwners, so); |
|
840 so->iNext = ownersTodelete; //add the owner to the list of owner objects to remove |
|
841 ownersTodelete = so; |
|
842 |
|
843 if (!surface->iOwners) //if the surface hasn't any owners |
|
844 { |
|
845 //remove the surface from the list |
|
846 UnlinkListItem(&iSurfacesIndex[index], surface); |
|
847 surface->iNext = surfacesTodelete; //add the surface to the list of surfaces to remove |
|
848 surfacesTodelete = surface; |
|
849 } |
|
850 } |
|
851 } |
|
852 } |
|
853 NKern::FMSignal(&iMutex); |
|
854 |
|
855 while(surfacesTodelete) |
|
856 { |
|
857 p = surfacesTodelete->iNext; |
|
858 Kern::ChunkClose(surfacesTodelete->iChunk); |
|
859 TRACE(Kern::Printf("SM Close chunk %08x CloseSurfaceHandlesForProcess",surfacesTodelete->iChunk);) |
|
860 delete surfacesTodelete; |
|
861 TRACE(Kern::Printf("SM D %08x TSurface CloseSurfaceHandlesForProcess",surfacesTodelete);) |
|
862 surfacesTodelete = p; |
|
863 } |
|
864 |
|
865 while(ownersTodelete) |
|
866 { |
|
867 so = ownersTodelete->iNext; |
|
868 delete ownersTodelete; |
|
869 TRACE(Kern::Printf("SM D %08x TProcessListItem CloseSurfaceHandlesForProcess",ownersTodelete);) |
|
870 ownersTodelete = so; |
|
871 } |
|
872 } |
|
873 |
|
874 |
|
875 /** |
|
876 Returns the metadata information about the specified surface. |
|
877 @param aId The id of the surface. |
|
878 @param aInfo Pointer to user side descriptor to receive the information. |
|
879 @return KErrNone if successful, KErrArgument if the surface ID does not refer to a surface, |
|
880 KErrAccessDenied if the surface is not open in the current process, otherwise a system wide |
|
881 error code. |
|
882 @internalTechnology |
|
883 */ |
|
884 TInt DSurfaceManager::SurfaceInfo(const TSurfaceId* aId, TDes8* aInfo) |
|
885 { |
|
886 TSurfaceId sid; |
|
887 //fetch surface id from user memory |
|
888 kumemget(&sid, aId, sizeof (TSurfaceId)); |
|
889 |
|
890 RSurfaceManager::TInfoBuf buf; |
|
891 RSurfaceManager::TSurfaceInfoV01& info = buf(); |
|
892 |
|
893 NKern::FMWait(&iMutex); |
|
894 //look it up |
|
895 TSurface* surface = FindSurfaceById(sid); |
|
896 if (!surface) |
|
897 { |
|
898 NKern::FMSignal(&iMutex); |
|
899 return KErrArgument; |
|
900 } |
|
901 |
|
902 //find the owner |
|
903 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
904 if (!so) |
|
905 { |
|
906 NKern::FMSignal(&iMutex); |
|
907 return KErrAccessDenied; //can do this, not open |
|
908 } |
|
909 |
|
910 //at this point, we have a surface, we are the owner and it's mapped in |
|
911 info.iSize = surface->iSize; // Visible width/height in pixels |
|
912 info.iBuffers = surface->iBuffers; // Number of Buffers |
|
913 info.iPixelFormat = surface->iPixelFormat; // pixel format |
|
914 info.iStride = surface->iStride; // Number of bytes between start of one line and start of next |
|
915 info.iContiguous = surface->iContiguous; // is it physically contiguous |
|
916 info.iCacheAttrib = surface->iCacheAttrib; // Underlying chunk is CPU cached or not |
|
917 info.iMappable = surface->iMappable; // Is the surface Mappable |
|
918 NKern::FMSignal(&iMutex); |
|
919 |
|
920 //copy it back to user side |
|
921 Kern::InfoCopy(*aInfo, buf); |
|
922 return KErrNone; |
|
923 } |
|
924 |
|
925 |
|
926 |
|
927 /** |
|
928 Generates a unique surface id |
|
929 @param aId Surface id reference to receive the generated id. |
|
930 @internalTechnology |
|
931 */ |
|
932 void DSurfaceManager::GenerateSurfaceId(TSurfaceId& aId) |
|
933 { |
|
934 TSurfaceId id; |
|
935 |
|
936 for (TInt x = 0; x < 4; ++x) |
|
937 { |
|
938 id.iInternal[x] = Kern::Random(); |
|
939 }; |
|
940 |
|
941 //package up the handle, |
|
942 //set the type identifier |
|
943 id.iInternal[3] &= 0x00FFFFFF; |
|
944 id.iInternal[3] |= TSurfaceTypes::ESurfaceManagerSurface << 24; |
|
945 aId = id; |
|
946 TRACE(Kern::Printf("SM GenerateSurfaceId id = %u %u %u %u\n",id.iInternal[0],id.iInternal[1],id.iInternal[2],id.iInternal[3]);) |
|
947 }; |
|
948 |
|
949 |
|
950 |
|
951 /** |
|
952 Validates the surface creation attributes and calculates the size of the chunk required. |
|
953 @param aAttribs The surface creation attributes used to specify the surface requirements. |
|
954 @param aOffset Set to the offset between buffers on successfull return. |
|
955 @param aNewChunk If this is true, surface is created in a new chunk otherwise the surface is created in an existing chunk |
|
956 @return The size of chunk required. A size of 0 indicates a problem. |
|
957 */ |
|
958 TInt DSurfaceManager::ValidateAndCalculateChunkSize(RSurfaceManager::TSurfaceCreationAttributes& aAttribs, |
|
959 TInt& aOffset, TUint &aActualBufferSize, const TBool aNewChunk) |
|
960 { |
|
961 /* |
|
962 TRACE(Kern::Printf("SM width = %d height = %d\n", aAttribs.iSize.iWidth, aAttribs.iSize.iHeight);) |
|
963 TRACE(Kern::Printf("SM buffers = %d\n", aAttribs.iBuffers);) |
|
964 TRACE(Kern::Printf("SM format = %d\n", aAttribs.iPixelFormat);) |
|
965 TRACE(Kern::Printf("SM stride = %d\n", aAttribs.iStride);) |
|
966 TRACE(Kern::Printf("SM offset to first buffer = %d\n", aAttribs.iOffsetToFirstBuffer);) |
|
967 TRACE(Kern::Printf("SM offset between buffer = %d\n", aOffset);) |
|
968 TRACE(Kern::Printf("SM alignment = %d\n", aAttribs.iAlignment);) |
|
969 TRACE(Kern::Printf("SM contiguous = %d\n\n", aAttribs.iContiguous);) |
|
970 TRACE(Kern::Printf("SM cacheAttrib = %d\n\n", aAttribs.iCacheAttrib);) |
|
971 */ |
|
972 //check for negative values |
|
973 if(aAttribs.iOffsetToFirstBuffer < 0 || aOffset < 0 ) |
|
974 { |
|
975 TRACE(Kern::Printf("SM Validate offset for negative value");) |
|
976 return 0; |
|
977 } |
|
978 |
|
979 //check aligment is sensible |
|
980 TInt alignmentMask = 0; |
|
981 switch(aAttribs.iAlignment) |
|
982 { |
|
983 case 1: |
|
984 case 2: |
|
985 case 4: |
|
986 case 8: |
|
987 case 16: |
|
988 case 32: |
|
989 alignmentMask = 31; |
|
990 break; |
|
991 case 64: |
|
992 alignmentMask = 63; |
|
993 break; |
|
994 case RSurfaceManager::EPageAligned: |
|
995 break; |
|
996 default: |
|
997 TRACE(Kern::Printf("SM Validate alignment");) |
|
998 return 0; |
|
999 } |
|
1000 |
|
1001 //check alignment issues. |
|
1002 if(aAttribs.iAlignment != RSurfaceManager::EPageAligned) |
|
1003 { |
|
1004 if(aNewChunk) |
|
1005 { |
|
1006 if(aAttribs.iCacheAttrib == RSurfaceManager::ECached) // Surface is CPU cached, so the alignment will be based on either 32 or 64 byte |
|
1007 { |
|
1008 //offset to first buffer needs to fit alignment |
|
1009 aAttribs.iOffsetToFirstBuffer = aAttribs.iOffsetToFirstBuffer + alignmentMask & ~alignmentMask; |
|
1010 //alignment with respect to offsetbetweenbuffers |
|
1011 aOffset = aOffset + alignmentMask & ~alignmentMask; |
|
1012 } |
|
1013 else // Surface is NOT CPU cached, so the alignment will be based on surface attribute alignment |
|
1014 { |
|
1015 TUint alignMask = aAttribs.iAlignment-1; |
|
1016 //offset to first buffer needs to fit alignment |
|
1017 aAttribs.iOffsetToFirstBuffer = aAttribs.iOffsetToFirstBuffer + alignMask & ~alignMask; |
|
1018 //alignment with respect to offsetbetweenbuffers |
|
1019 aOffset = aOffset + alignMask & ~alignMask; |
|
1020 } |
|
1021 } |
|
1022 else // existing chunk |
|
1023 { |
|
1024 TUint alignMask = aAttribs.iAlignment-1; |
|
1025 //check alignment issues. offset to first buffer needs to fit alignment |
|
1026 if (aAttribs.iOffsetToFirstBuffer & alignMask) |
|
1027 { |
|
1028 TRACE(Kern::Printf("SM Validate offset to first pixel misaligned");) |
|
1029 return 0; |
|
1030 } |
|
1031 |
|
1032 //check alignment for offsetbetweenbuffers. offset between buffer needs to fit alignment for existing chunks |
|
1033 if (aOffset & alignMask) |
|
1034 { |
|
1035 TRACE(Kern::Printf("SM Validate offset between buffers misaligned");) |
|
1036 return 0; |
|
1037 } |
|
1038 } |
|
1039 } |
|
1040 else //page aligned |
|
1041 { |
|
1042 if(aNewChunk)// if its a new chunks and doesn't match exact alignment then do the rounding |
|
1043 { |
|
1044 TUint32 pageSize = Kern::RoundToPageSize(1); |
|
1045 //offset to first buffer needs to fit alignment |
|
1046 aAttribs.iOffsetToFirstBuffer = (aAttribs.iOffsetToFirstBuffer + (pageSize - 1)) & ~(pageSize - 1); |
|
1047 //alignment with respect to offsetbetweenbuffers |
|
1048 aOffset = (aOffset + (pageSize - 1)) & ~((pageSize - 1)); |
|
1049 } |
|
1050 else // for existing chunks don't do any rounding operation |
|
1051 { |
|
1052 TUint32 pageSize = Kern::RoundToPageSize(1); |
|
1053 TUint alignmask = aAttribs.iOffsetToFirstBuffer & (pageSize - 1); |
|
1054 if (alignmask) |
|
1055 { |
|
1056 TRACE(Kern::Printf("SM Validate offset to first pixel misaligned");) |
|
1057 return 0; |
|
1058 } |
|
1059 |
|
1060 alignmask = aOffset & (pageSize - 1); |
|
1061 if (alignmask) |
|
1062 { |
|
1063 TRACE(Kern::Printf("SM Validate offset between buffers misaligned");) |
|
1064 return 0; |
|
1065 } |
|
1066 } |
|
1067 } |
|
1068 |
|
1069 //check width and height |
|
1070 if(aAttribs.iSize.iWidth <= 0 || aAttribs.iSize.iHeight <= 0) |
|
1071 { |
|
1072 TRACE(Kern::Printf("SM Validate width/height");) |
|
1073 return 0; |
|
1074 } |
|
1075 |
|
1076 |
|
1077 //check there is at least 1 buffer |
|
1078 if (aAttribs.iBuffers <= 0) |
|
1079 { |
|
1080 TRACE(Kern::Printf("SM Validate buffers");) |
|
1081 return 0; |
|
1082 } |
|
1083 |
|
1084 //Sort the array and also check for duplication |
|
1085 if (!SortHints(aAttribs.iSurfaceHints,aAttribs.iHintCount)) |
|
1086 { |
|
1087 TRACE(Kern::Printf("SM Validate Duplicate hint key");) |
|
1088 return 0; |
|
1089 } |
|
1090 |
|
1091 TUint size = 0; |
|
1092 //calculate buffer size and round it to alignment or to page size |
|
1093 TInt64 bufferSize = aAttribs.iStride; |
|
1094 bufferSize *= aAttribs.iSize.iHeight; |
|
1095 |
|
1096 if (I64HIGH(bufferSize) > 0) //too big |
|
1097 { |
|
1098 TRACE(Kern::Printf("SM Validate chunk buffer size is out of range");) |
|
1099 return 0; |
|
1100 } |
|
1101 |
|
1102 TUint bsize = I64LOW(bufferSize); |
|
1103 if (bsize > KMaxTInt) |
|
1104 { |
|
1105 TRACE(Kern::Printf("SM Validate buffer size is out of range for TInt");) |
|
1106 return 0; |
|
1107 } |
|
1108 |
|
1109 if(aAttribs.iAlignment == RSurfaceManager::EPageAligned) |
|
1110 { |
|
1111 bsize = Kern::RoundToPageSize(bsize); //page alignment |
|
1112 } |
|
1113 else if(aAttribs.iCacheAttrib == RSurfaceManager::ECached) |
|
1114 { |
|
1115 bsize = bsize + alignmentMask & ~alignmentMask; //CPU cached byte alignment, for minimum of the specified alignment(32 or 64) |
|
1116 } |
|
1117 else |
|
1118 { |
|
1119 bsize = bsize + (aAttribs.iAlignment-1) & ~(aAttribs.iAlignment-1); //NON CPU cached byte alignment for 1, 2, 4, 8, 16, 32 and 64 |
|
1120 } |
|
1121 |
|
1122 bufferSize = bsize; |
|
1123 // Remember the actual size. |
|
1124 aActualBufferSize = bsize; |
|
1125 |
|
1126 //if offset between buffers is zero, then assign the calculated value as offset between buffers |
|
1127 if(aOffset == 0) |
|
1128 { |
|
1129 //buffer size rounded to alignment as offset between buffers |
|
1130 aOffset = I64INT(bufferSize); |
|
1131 } |
|
1132 else if(aOffset < I64INT(bufferSize)) |
|
1133 { |
|
1134 TRACE(Kern::Printf("SM Offset between the buffer is less than the required size");) |
|
1135 return 0; |
|
1136 } |
|
1137 else |
|
1138 { |
|
1139 //use the buffer size specified |
|
1140 bufferSize = aOffset; |
|
1141 } |
|
1142 |
|
1143 |
|
1144 TInt64 totalSize = aAttribs.iOffsetToFirstBuffer + (aAttribs.iBuffers * bufferSize); |
|
1145 |
|
1146 if (I64HIGH(totalSize) > 0) //too big |
|
1147 { |
|
1148 TRACE(Kern::Printf("SM Validate chunk size is out of range for RoundToPageSize");) |
|
1149 return 0; |
|
1150 } |
|
1151 |
|
1152 size = I64LOW(totalSize); |
|
1153 if (size > KMaxTInt) |
|
1154 { |
|
1155 TRACE(Kern::Printf("SM Validate size is out of range for TInt");) |
|
1156 return 0; |
|
1157 } |
|
1158 |
|
1159 size = Kern::RoundToPageSize(size); |
|
1160 |
|
1161 //check the size isn't greater than will fit in a TInt |
|
1162 if (size > KMaxTInt) |
|
1163 { |
|
1164 TRACE(Kern::Printf("SM Rounded size is out of range for TInt");) |
|
1165 return 0; |
|
1166 } |
|
1167 |
|
1168 TRACE(Kern::Printf("SM After validate - offset to first buffer = %d\n", aAttribs.iOffsetToFirstBuffer);) |
|
1169 TRACE(Kern::Printf("SM After validate - offset between buffer = %d\n", aOffset);) |
|
1170 TRACE(Kern::Printf("SM CalculateChunkSize size = %d\n", size);) |
|
1171 return size; |
|
1172 } |
|
1173 |
|
1174 |
|
1175 /** |
|
1176 Find the surface in the list. |
|
1177 @param aId The surface id of the surface to find in the surface list |
|
1178 @return pointer to the surface object |
|
1179 @internalTechnology |
|
1180 */ |
|
1181 TSurface* DSurfaceManager::FindSurfaceById(const TSurfaceId& aId) |
|
1182 { |
|
1183 TSurface *p = iSurfacesIndex[SurfaceIdToIndex(aId)]; |
|
1184 while (p) |
|
1185 { |
|
1186 if (aId == p->iId) |
|
1187 { |
|
1188 //found it |
|
1189 return p; |
|
1190 } |
|
1191 |
|
1192 p = p->iNext; |
|
1193 } |
|
1194 return NULL; |
|
1195 } |
|
1196 |
|
1197 |
|
1198 /** |
|
1199 Find the index of the hint key from the surface list using binary search. |
|
1200 @param aHintsArray Pointer to the first element in the array of surface hints |
|
1201 @param aKey The surface hint key uid value to search in the surface list |
|
1202 @return index of the hint pair key in the surface list, KErrNotFound if key not found |
|
1203 @internalTechnology |
|
1204 */ |
|
1205 TInt DSurfaceManager::FindHintKey(const RSurfaceManager::THintPair* aHintsArray, TUint32 aKey) const |
|
1206 { |
|
1207 __ASSERT_DEBUG(aHintsArray != NULL, Kern::Fault("Surface Manager", __LINE__)); |
|
1208 |
|
1209 TInt bottom = 0; |
|
1210 TInt top = KMaxHintsPerSurface - 1; |
|
1211 TInt mid; |
|
1212 while (bottom <= top) |
|
1213 { |
|
1214 mid = (bottom + top) / 2; |
|
1215 if((TUint) aHintsArray[mid].iKey.iUid == aKey) |
|
1216 { |
|
1217 return mid; |
|
1218 } |
|
1219 else if ((TUint)aHintsArray[mid].iKey.iUid < aKey) |
|
1220 { |
|
1221 top = mid - 1; |
|
1222 } |
|
1223 else |
|
1224 { |
|
1225 bottom = mid + 1; |
|
1226 } |
|
1227 } |
|
1228 return KErrNotFound; //Hint key not found |
|
1229 } |
|
1230 |
|
1231 TProcessListItem* DSurfaceManager::FindConnectedProcess(const DProcess* aProcess) |
|
1232 { |
|
1233 TProcessListItem * p = iConnectedProcesses; |
|
1234 while (p) |
|
1235 { |
|
1236 if (aProcess == p->iOwningProcess) |
|
1237 { |
|
1238 //found it |
|
1239 return p; |
|
1240 } |
|
1241 |
|
1242 p = p->iNext; |
|
1243 } |
|
1244 return NULL; |
|
1245 } |
|
1246 |
|
1247 /** |
|
1248 Searches for a right place to insert the new hint pair in a sorted array. |
|
1249 @param aHintsArray Pointer to the first element in the sorted array |
|
1250 @param aKey The surface hint key uid value to search in the surface list |
|
1251 @pre, there is at least one empty place in the array |
|
1252 @return KErrNone if a new hint pair key inserted in the surface list, KErrAlreadyExists if duplicated |
|
1253 @internalTechnology |
|
1254 */ |
|
1255 TInt DSurfaceManager::InsertHintKey(RSurfaceManager::THintPair* aHintsArray, const RSurfaceManager::THintPair& aHintPair) const |
|
1256 { |
|
1257 __ASSERT_DEBUG(aHintsArray != NULL, Kern::Fault("Surface Manager", __LINE__)); |
|
1258 __ASSERT_DEBUG(aHintsArray[KMaxHintsPerSurface-1].iKey.iUid == NULL, Kern::Fault("Surface Manager", __LINE__)); |
|
1259 |
|
1260 TInt pos = 0; |
|
1261 if (aHintsArray[pos].iKey.iUid != 0) |
|
1262 { |
|
1263 while((TUint)aHintsArray[pos].iKey.iUid>(TUint)aHintPair.iKey.iUid && pos < KMaxHintsPerSurface-1) |
|
1264 {// find the right place to insert |
|
1265 ++pos; |
|
1266 } |
|
1267 |
|
1268 if((TUint)aHintsArray[pos].iKey.iUid==(TUint)aHintPair.iKey.iUid) |
|
1269 { |
|
1270 //Duplicate key |
|
1271 return KErrAlreadyExists; |
|
1272 } |
|
1273 else |
|
1274 { |
|
1275 // Shift right |
|
1276 memmove(aHintsArray+pos+1, aHintsArray+pos, (KMaxHintsPerSurface-pos-1)*sizeof(RSurfaceManager::THintPair)); |
|
1277 } |
|
1278 } |
|
1279 aHintsArray[pos] = aHintPair; |
|
1280 return KErrNone; |
|
1281 } |
|
1282 |
|
1283 /** |
|
1284 Sort the surface hint array in descending order. |
|
1285 @param aHintsArray The surface hintpair in the surface list |
|
1286 @param aNumberOfHints The number of hints |
|
1287 @return ETrue if sorting is finished or it is an empty array, EFalse if key duplicated |
|
1288 @internalTechnology |
|
1289 */ |
|
1290 TBool DSurfaceManager::SortHints(RSurfaceManager::THintPair* aHintsArray, TInt aNumberOfHints) const |
|
1291 { |
|
1292 TInt in = 0; |
|
1293 TInt out = 0; |
|
1294 RSurfaceManager::THintPair temp; |
|
1295 if(!aHintsArray) |
|
1296 { |
|
1297 return ETrue; |
|
1298 } |
|
1299 for(out = 0; out < aNumberOfHints; ++out) |
|
1300 { |
|
1301 if(aHintsArray[out].iKey.iUid != 0) |
|
1302 { |
|
1303 temp = aHintsArray[out]; |
|
1304 in = out; // start shifting at out |
|
1305 while(in > 0 && (TUint)aHintsArray[in-1].iKey.iUid <= (TUint)temp.iKey.iUid) |
|
1306 { |
|
1307 if ((TUint)aHintsArray[in-1].iKey.iUid == (TUint)temp.iKey.iUid) |
|
1308 { |
|
1309 return EFalse; //duplicate hint keys are not allowed |
|
1310 } |
|
1311 aHintsArray[in] = aHintsArray[in-1]; // shift item to the right |
|
1312 --in; // go left one position |
|
1313 } |
|
1314 aHintsArray[in] = temp; // insert marked item |
|
1315 } |
|
1316 } |
|
1317 return ETrue; |
|
1318 } |
|
1319 |
|
1320 |
|
1321 /** |
|
1322 Ensures the memory is updated consistently before/after triggering non CPU hardware access. |
|
1323 @param aParam The suface id and buffer number (0 based). |
|
1324 @param aOperation The type of the synchronize operation. |
|
1325 @return KErrNone if successful, KErrArgument if the surface ID is invalid or |
|
1326 buffer number is invalid, KErrAccessDenied if the surface is not open in this |
|
1327 process, otherwise a system wide error code. |
|
1328 @see RSurfaceManager::TSyncOperation |
|
1329 @internalTechnology |
|
1330 */ |
|
1331 TInt DSurfaceManager::SynchronizeCache(RSurfaceManagerDriver::TDeviceParam* aParam, RSurfaceManager::TSyncOperation aOperation) |
|
1332 { |
|
1333 //Parse the parameters |
|
1334 RSurfaceManagerDriver::TDeviceParam param; |
|
1335 kumemget(¶m, aParam, sizeof(RSurfaceManagerDriver::TDeviceParam)); |
|
1336 TSurfaceId sid; |
|
1337 kumemget(&sid, param.iSurfaceId, sizeof(TSurfaceId)); |
|
1338 TInt buffer = (TInt)param.iBuffer; |
|
1339 |
|
1340 NKern::ThreadEnterCS(); |
|
1341 NKern::FMWait(&iMutex); |
|
1342 //look it up |
|
1343 TSurface* surface = FindSurfaceById(sid); |
|
1344 if (!surface) |
|
1345 { |
|
1346 NKern::FMSignal(&iMutex); |
|
1347 NKern::ThreadLeaveCS(); |
|
1348 return KErrArgument; |
|
1349 } |
|
1350 |
|
1351 //find the owner |
|
1352 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
1353 if (!so) |
|
1354 { |
|
1355 NKern::FMSignal(&iMutex); |
|
1356 NKern::ThreadLeaveCS(); |
|
1357 return KErrAccessDenied; |
|
1358 } |
|
1359 |
|
1360 // surfaces have to have at least one buffer |
|
1361 __ASSERT_DEBUG(surface->iBuffers > 0, Kern::Fault("Surface Manager", __LINE__)); |
|
1362 |
|
1363 //Validate the buffer number is within range |
|
1364 if((buffer >= surface->iBuffers) || (buffer < 0)) |
|
1365 { |
|
1366 NKern::FMSignal(&iMutex); |
|
1367 NKern::ThreadLeaveCS(); |
|
1368 return KErrArgument; |
|
1369 } |
|
1370 |
|
1371 DChunk* chunk = surface->iChunk; |
|
1372 TInt offsetBetweenBuffers = surface->iOffsetBetweenBuffers; |
|
1373 NKern::FMSignal(&iMutex); |
|
1374 |
|
1375 TUint32 kernAddr; |
|
1376 TUint32 mapAttr; |
|
1377 TUint32 physAddr; |
|
1378 TInt pageList = chunk->iSize / Kern::RoundToPageSize(1) + 1; |
|
1379 TUint32* physAddr2 = new TUint32[pageList]; |
|
1380 if(!physAddr2) |
|
1381 { |
|
1382 NKern::ThreadLeaveCS(); |
|
1383 return KErrNoMemory; |
|
1384 } |
|
1385 |
|
1386 TRACE(Kern::Printf("SM %08x DChunk SynchronizeCache", chunk);) |
|
1387 |
|
1388 //Retrieve the kernel address and mapping attribute from the chunk |
|
1389 TInt err = Kern::ChunkPhysicalAddress(chunk, surface->iOffsetToFirstBuffer + (buffer * offsetBetweenBuffers), offsetBetweenBuffers, kernAddr, mapAttr, physAddr, physAddr2); |
|
1390 delete[] physAddr2; |
|
1391 if(err >= KErrNone) |
|
1392 { |
|
1393 TRACE(Kern::Printf("SM %08x kernAddr SynchronizeCache", kernAddr);) |
|
1394 TRACE(Kern::Printf("SM %08x mapAttr SynchronizeCache", mapAttr);) |
|
1395 err = KErrNone; |
|
1396 |
|
1397 // Do the sync operation |
|
1398 switch(aOperation) |
|
1399 { |
|
1400 case RSurfaceManager::ESyncBeforeNonCPURead: |
|
1401 Cache::SyncMemoryBeforeDmaWrite(kernAddr, offsetBetweenBuffers, mapAttr); |
|
1402 break; |
|
1403 case RSurfaceManager::ESyncBeforeNonCPUWrite: |
|
1404 Cache::SyncMemoryBeforeDmaRead(kernAddr, offsetBetweenBuffers, mapAttr); |
|
1405 break; |
|
1406 case RSurfaceManager::ESyncAfterNonCPUWrite: |
|
1407 Cache::SyncMemoryAfterDmaRead(kernAddr, offsetBetweenBuffers); |
|
1408 break; |
|
1409 default: |
|
1410 err = KErrArgument; |
|
1411 break; |
|
1412 } |
|
1413 } |
|
1414 NKern::ThreadLeaveCS(); |
|
1415 |
|
1416 return err; |
|
1417 } |
|
1418 |
|
1419 |
|
1420 /** |
|
1421 Get the surface hint value for the given surface ID and hint pair key. |
|
1422 @param aSurfaceId The surface identifier originally returned when the surface was created. |
|
1423 @param aHintPair The hint value for the requested hint pair key. |
|
1424 @return KErrNone if successful, KErrArgument if the surface ID is invalid or |
|
1425 invalid hint pair key used, KErrAccessDenied if the surface is not open in the |
|
1426 current process, otherwise a system wide error code. |
|
1427 @internalTechnology |
|
1428 */ |
|
1429 TInt DSurfaceManager::GetSurfaceHint(const TSurfaceId* aSurfaceId, RSurfaceManager::THintPair* aHintPair) |
|
1430 { |
|
1431 RSurfaceManager::THintPair hintPair; |
|
1432 kumemget(&hintPair, aHintPair, sizeof(RSurfaceManager::THintPair)); |
|
1433 |
|
1434 if (hintPair.iKey.iUid == 0) |
|
1435 { |
|
1436 TRACE(Kern::Printf("SM GetSurfaceHint Hint key is invalid");) |
|
1437 return KErrArgument; //Invalid Hint key |
|
1438 } |
|
1439 |
|
1440 TSurfaceId sid; |
|
1441 //fetch surface id from user memory |
|
1442 kumemget(&sid, aSurfaceId, sizeof (TSurfaceId)); |
|
1443 |
|
1444 NKern::FMWait(&iMutex); |
|
1445 //look it up |
|
1446 TSurface* surface = FindSurfaceById(sid); |
|
1447 if (!surface) |
|
1448 { |
|
1449 NKern::FMSignal(&iMutex); |
|
1450 return KErrArgument; |
|
1451 } |
|
1452 |
|
1453 //find the owner |
|
1454 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
1455 if (!so) |
|
1456 { |
|
1457 NKern::FMSignal(&iMutex); |
|
1458 return KErrAccessDenied; |
|
1459 } |
|
1460 |
|
1461 //at this point, we have a surface, we have to find the hint value based on the hint pair key |
|
1462 TInt index = FindHintKey(surface->iSurfaceHints, hintPair.iKey.iUid); |
|
1463 |
|
1464 if (index == KErrNotFound) |
|
1465 { |
|
1466 TRACE(Kern::Printf("SM GetSurfaceHint Hint key not found");) |
|
1467 NKern::FMSignal(&iMutex); |
|
1468 return KErrArgument; //Hint key not found |
|
1469 } |
|
1470 |
|
1471 RSurfaceManager::THintPair hint = surface->iSurfaceHints[index]; |
|
1472 NKern::FMSignal(&iMutex); |
|
1473 |
|
1474 TRACE(Kern::Printf("SM GetSurfaceHint Hint value %d", hint.iValue);) |
|
1475 //write it back to user side |
|
1476 kumemput(aHintPair, &hint, sizeof(RSurfaceManager::THintPair)); |
|
1477 return KErrNone; |
|
1478 } |
|
1479 |
|
1480 |
|
1481 /** |
|
1482 Set the surface hint value for an existing surface hint key of the surface Id. |
|
1483 @param aSurfaceId The surface identifier originally returned when the surface was created. |
|
1484 @param aHintPair The value of the hint pair to set. |
|
1485 @return KErrNone if successful, KErrArgument if the surface ID is invalid or if invalid |
|
1486 hint key used, KErrAccessDenied if the hint pair is immutable or the surface is not open |
|
1487 in the current process, otherwise a system wide error code. |
|
1488 @internalTechnology |
|
1489 */ |
|
1490 TInt DSurfaceManager::SetSurfaceHint(const TSurfaceId* aSurfaceId, const RSurfaceManager::THintPair* aHintPair) |
|
1491 { |
|
1492 RSurfaceManager::THintPair hintPair; |
|
1493 kumemget(&hintPair, aHintPair, sizeof(RSurfaceManager::THintPair)); |
|
1494 |
|
1495 //Check for valid hint key |
|
1496 if (!hintPair.iKey.iUid) |
|
1497 { |
|
1498 TRACE(Kern::Printf("SM SetSurfaceHint Hint key is invalid");) |
|
1499 return KErrArgument; //Invalid Hint key |
|
1500 } |
|
1501 |
|
1502 TSurfaceId sid; |
|
1503 //fetch surface id from user memory |
|
1504 kumemget(&sid, aSurfaceId, sizeof (TSurfaceId)); |
|
1505 |
|
1506 NKern::ThreadEnterCS(); |
|
1507 NKern::FMWait(&iMutex); |
|
1508 //look it up |
|
1509 TSurface* surface = FindSurfaceById(sid); |
|
1510 if (!surface) |
|
1511 { |
|
1512 NKern::FMSignal(&iMutex); |
|
1513 NKern::ThreadLeaveCS(); |
|
1514 return KErrArgument; |
|
1515 } |
|
1516 |
|
1517 //find the owner |
|
1518 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
1519 if (!so) |
|
1520 { |
|
1521 NKern::FMSignal(&iMutex); |
|
1522 NKern::ThreadLeaveCS(); |
|
1523 return KErrAccessDenied; |
|
1524 } |
|
1525 |
|
1526 //at this point, we have a surface, we have to find the hint value based on the hint pair key |
|
1527 TInt index = FindHintKey(surface->iSurfaceHints, hintPair.iKey.iUid); |
|
1528 if (index == KErrNotFound) |
|
1529 { |
|
1530 TRACE(Kern::Printf("SM SetSurfaceHint Hint key not found or invalid");) |
|
1531 NKern::FMSignal(&iMutex); |
|
1532 NKern::ThreadLeaveCS(); |
|
1533 return KErrArgument; //Hint key not found or invalid |
|
1534 } |
|
1535 |
|
1536 //Check for mutability |
|
1537 if(!surface->iSurfaceHints[index].iMutable) |
|
1538 { |
|
1539 TRACE(Kern::Printf("SM SetSurfaceHint Hint is immutable");) |
|
1540 NKern::FMSignal(&iMutex); |
|
1541 NKern::ThreadLeaveCS(); |
|
1542 return KErrAccessDenied; //Hint pair is immutable |
|
1543 } |
|
1544 TRACE(Kern::Printf("SM SetSurfaceHint Hint key found and updated its value %d for the surface %08x \n", aHintPair->iValue, &sid);) |
|
1545 |
|
1546 //set the hint pair value now |
|
1547 memcpy(&surface->iSurfaceHints[index], &hintPair, sizeof(RSurfaceManager::THintPair)); |
|
1548 NKern::FMSignal(&iMutex); |
|
1549 NKern::ThreadLeaveCS(); |
|
1550 |
|
1551 return KErrNone; |
|
1552 } |
|
1553 |
|
1554 /** |
|
1555 Add a new surface hint value for the surface Id. |
|
1556 @param aSurfaceId The surface identifier originally returned when the surface was created. |
|
1557 @param aHintPair The value of the hint pair to Add. |
|
1558 @return Returns KErrNone if successful, KErrArgument if the surface ID is invalid or the |
|
1559 hint pair has invalid key UID, KErrAccessDenied if the surface is not open in the current |
|
1560 process, KErrAlreadyExists if duplicate hint key used, KErrOverflow if no space to add new |
|
1561 pair, otherwise a system wide error code. |
|
1562 @internalTechnology |
|
1563 */ |
|
1564 TInt DSurfaceManager::AddSurfaceHint(const TSurfaceId* aSurfaceId, const RSurfaceManager::THintPair* aHintPair) |
|
1565 { |
|
1566 RSurfaceManager::THintPair hintPair; |
|
1567 kumemget(&hintPair, aHintPair, sizeof(RSurfaceManager::THintPair)); |
|
1568 |
|
1569 //Check for valid hint key |
|
1570 if (hintPair.iKey.iUid == 0) |
|
1571 { |
|
1572 TRACE(Kern::Printf("SM AddSurfaceHint Hint key is invalid");) |
|
1573 return KErrArgument; //Invalid Hint key |
|
1574 } |
|
1575 |
|
1576 TSurfaceId sid; |
|
1577 //fetch surface id from user memory |
|
1578 kumemget(&sid, aSurfaceId, sizeof (TSurfaceId)); |
|
1579 |
|
1580 NKern::ThreadEnterCS(); |
|
1581 NKern::FMWait(&iMutex); |
|
1582 //look it up |
|
1583 TSurface* surface = FindSurfaceById(sid); |
|
1584 if (!surface) |
|
1585 { |
|
1586 NKern::FMSignal(&iMutex); |
|
1587 NKern::ThreadLeaveCS(); |
|
1588 return KErrArgument; |
|
1589 } |
|
1590 |
|
1591 //find the owner |
|
1592 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
1593 if (!so) |
|
1594 { |
|
1595 NKern::FMSignal(&iMutex); |
|
1596 NKern::ThreadLeaveCS(); |
|
1597 return KErrAccessDenied; |
|
1598 } |
|
1599 |
|
1600 |
|
1601 //Check for empty hint pair |
|
1602 if(surface->iSurfaceHints[KMaxHintsPerSurface - 1].iKey.iUid != 0)//at least end of sorted hint array should be 0 to add a new hint |
|
1603 { |
|
1604 TRACE(Kern::Printf("SM AddSurfaceHint there is no room to add the hint");) |
|
1605 NKern::FMSignal(&iMutex); |
|
1606 NKern::ThreadLeaveCS(); |
|
1607 return KErrOverflow; //No room for new hint |
|
1608 } |
|
1609 //We found room for a new hint pair, so insert it in the array |
|
1610 // Meanwhile, we check for duplication, if it is, return KErrAlreadyExists |
|
1611 TInt err = InsertHintKey(surface->iSurfaceHints,hintPair); |
|
1612 NKern::FMSignal(&iMutex); |
|
1613 TRACE(Kern::Printf("SM AddSurfaceHint Added new key ");) |
|
1614 NKern::ThreadLeaveCS(); |
|
1615 return err; |
|
1616 } |
|
1617 |
|
1618 /** |
|
1619 Get the offset of the specified buffer from the base address of the underlying |
|
1620 chunk. |
|
1621 |
|
1622 To obtain the address of the buffer, the offset returned must be added onto the |
|
1623 base address of the RChunk returned in a call to MapSurface(). Note that |
|
1624 buffer offsets are immutable during the lifetime of the surface. |
|
1625 @param aParam The input parameters including the surface ID and buffer index. |
|
1626 @pre The surface is open in the calling process. |
|
1627 @return KErrNone if successful, KErrArgument if aSurfaceId or aBuffer are invalid, |
|
1628 KErrAccessDenied if the surface is not open in the current process, KErrNotSupported if |
|
1629 the surface is not mappable, otherwise a system wide error code. |
|
1630 */ |
|
1631 TInt DSurfaceManager::GetBufferOffset(RSurfaceManagerDriver::TDeviceParam* aParam,TUint* aOffset) |
|
1632 { |
|
1633 //Get the input parameters |
|
1634 RSurfaceManagerDriver::TDeviceParam param; |
|
1635 kumemget(¶m, aParam, sizeof(RSurfaceManagerDriver::TDeviceParam)); |
|
1636 TSurfaceId sid; |
|
1637 //fetch surface id from user memory |
|
1638 kumemget(&sid, param.iSurfaceId, sizeof(TSurfaceId)); |
|
1639 //(TAny*)iBuffer holds the buffer number in its value |
|
1640 TInt bufferNumber = (TInt) param.iBuffer; |
|
1641 |
|
1642 TSurface* surface = NULL; |
|
1643 NKern::FMWait(&iMutex); |
|
1644 surface = FindSurfaceById(sid); |
|
1645 if(NULL == surface || (bufferNumber >= surface->iBuffers)) |
|
1646 { |
|
1647 NKern::FMSignal(&iMutex); |
|
1648 return KErrArgument; |
|
1649 } |
|
1650 if(!surface->iMappable) |
|
1651 { |
|
1652 NKern::FMSignal(&iMutex); |
|
1653 return KErrNotSupported; |
|
1654 } |
|
1655 //find the owner |
|
1656 TProcessListItem* so = surface->ProcessOwnerInfo(&Kern::CurrentProcess()); |
|
1657 if (!so) |
|
1658 { |
|
1659 NKern::FMSignal(&iMutex); |
|
1660 return KErrAccessDenied; |
|
1661 } |
|
1662 TInt bufferOffset = surface->iOffsetToFirstBuffer + bufferNumber*surface->iOffsetBetweenBuffers; |
|
1663 NKern::FMSignal(&iMutex); |
|
1664 |
|
1665 kumemput(aOffset, &bufferOffset, sizeof (TInt)); |
|
1666 return KErrNone; |
|
1667 } |
|
1668 |
|
1669 /** |
|
1670 Returns information specific to the Surface Manager implementation. |
|
1671 @param aAttrib: Attribute to retrieve |
|
1672 @param aValue : Output parameter where we write the value for the specified attribute |
|
1673 @return KErrNone if successful or KErrArgument if the attribute UID is not recognized |
|
1674 @internalTechnology |
|
1675 */ |
|
1676 TInt DSurfaceManager::GetSurfaceManagerAttrib(RSurfaceManager::TSurfaceManagerAttrib* aAttrib,TInt* aValue) |
|
1677 { |
|
1678 RSurfaceManager::TSurfaceManagerAttrib attrib; |
|
1679 kumemget(&attrib, aAttrib, sizeof(RSurfaceManager::TSurfaceManagerAttrib)); |
|
1680 |
|
1681 TInt out=KErrNone; |
|
1682 TInt value; |
|
1683 switch (attrib) |
|
1684 { |
|
1685 case RSurfaceManager::EMaxNumberOfHints: |
|
1686 value=KMaxHintsPerSurface; |
|
1687 break; |
|
1688 |
|
1689 default: |
|
1690 out=KErrArgument; |
|
1691 break; |
|
1692 }; |
|
1693 |
|
1694 if (out==KErrNone) |
|
1695 { |
|
1696 kumemput(aValue, &value, sizeof (TInt)); |
|
1697 } |
|
1698 return out; |
|
1699 } |