1 | /* $Id: VBoxMPShgsmi.cpp 50859 2014-03-25 10:46:17Z vboxsync $ */
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2 |
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3 | /** @file
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4 | * VBox WDDM Miniport driver
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5 | */
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6 |
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7 | /*
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8 | * Copyright (C) 2011-2012 Oracle Corporation
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9 | *
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10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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11 | * available from http://www.virtualbox.org. This file is free software;
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12 | * you can redistribute it and/or modify it under the terms of the GNU
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13 | * General Public License (GPL) as published by the Free Software
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14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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17 | */
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18 |
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19 | #include "VBoxMPWddm.h"
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20 | #include <iprt/semaphore.h>
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21 |
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22 | /* SHGSMI */
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23 | DECLINLINE(void) vboxSHGSMICommandRetain (PVBOXSHGSMIHEADER pCmd)
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24 | {
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25 | ASMAtomicIncU32(&pCmd->cRefs);
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26 | }
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27 |
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28 | void vboxSHGSMICommandFree (PVBOXSHGSMI pHeap, PVBOXSHGSMIHEADER pCmd)
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29 | {
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30 | VBoxSHGSMIHeapFree(pHeap, pCmd);
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31 | }
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32 |
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33 | DECLINLINE(void) vboxSHGSMICommandRelease (PVBOXSHGSMI pHeap, PVBOXSHGSMIHEADER pCmd)
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34 | {
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35 | uint32_t cRefs = ASMAtomicDecU32(&pCmd->cRefs);
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36 | Assert(cRefs < UINT32_MAX / 2);
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37 | if(!cRefs)
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38 | vboxSHGSMICommandFree (pHeap, pCmd);
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39 | }
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40 |
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41 | DECLCALLBACK(void) vboxSHGSMICompletionSetEvent(PVBOXSHGSMI pHeap, void *pvCmd, void *pvContext)
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42 | {
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43 | RTSemEventSignal((RTSEMEVENT)pvContext);
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44 | }
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45 |
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46 | DECLCALLBACK(void) vboxSHGSMICompletionCommandRelease(PVBOXSHGSMI pHeap, void *pvCmd, void *pvContext)
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47 | {
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48 | vboxSHGSMICommandRelease (pHeap, VBoxSHGSMIBufferHeader(pvCmd));
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49 | }
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50 |
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51 | /* do not wait for completion */
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52 | DECLINLINE(const VBOXSHGSMIHEADER*) vboxSHGSMICommandPrepAsynch (PVBOXSHGSMI pHeap, PVBOXSHGSMIHEADER pHeader)
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53 | {
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54 | /* ensure the command is not removed until we're processing it */
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55 | vboxSHGSMICommandRetain(pHeader);
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56 | return pHeader;
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57 | }
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58 |
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59 | DECLINLINE(void) vboxSHGSMICommandDoneAsynch (PVBOXSHGSMI pHeap, const VBOXSHGSMIHEADER* pHeader)
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60 | {
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61 | if(!(ASMAtomicReadU32((volatile uint32_t *)&pHeader->fFlags) & VBOXSHGSMI_FLAG_HG_ASYNCH))
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62 | {
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63 | PFNVBOXSHGSMICMDCOMPLETION pfnCompletion = (PFNVBOXSHGSMICMDCOMPLETION)pHeader->u64Info1;
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64 | if (pfnCompletion)
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65 | pfnCompletion(pHeap, VBoxSHGSMIBufferData (pHeader), (PVOID)pHeader->u64Info2);
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66 | }
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67 |
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68 | vboxSHGSMICommandRelease(pHeap, (PVBOXSHGSMIHEADER)pHeader);
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69 | }
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70 |
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71 | const VBOXSHGSMIHEADER* VBoxSHGSMICommandPrepAsynchEvent (PVBOXSHGSMI pHeap, PVOID pvBuff, RTSEMEVENT hEventSem)
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72 | {
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73 | PVBOXSHGSMIHEADER pHeader = VBoxSHGSMIBufferHeader (pvBuff);
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74 | pHeader->u64Info1 = (uint64_t)vboxSHGSMICompletionSetEvent;
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75 | pHeader->u64Info2 = (uint64_t)hEventSem;
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76 | pHeader->fFlags = VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ;
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77 |
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78 | return vboxSHGSMICommandPrepAsynch (pHeap, pHeader);
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79 | }
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80 |
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81 | const VBOXSHGSMIHEADER* VBoxSHGSMICommandPrepSynch (PVBOXSHGSMI pHeap, PVOID pCmd)
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82 | {
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83 | RTSEMEVENT hEventSem;
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84 | int rc = RTSemEventCreate(&hEventSem);
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85 | Assert(RT_SUCCESS(rc));
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86 | if (RT_SUCCESS(rc))
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87 | {
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88 | return VBoxSHGSMICommandPrepAsynchEvent (pHeap, pCmd, hEventSem);
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89 | }
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90 | return NULL;
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91 | }
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92 |
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93 | void VBoxSHGSMICommandDoneAsynch (PVBOXSHGSMI pHeap, const VBOXSHGSMIHEADER * pHeader)
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94 | {
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95 | vboxSHGSMICommandDoneAsynch(pHeap, pHeader);
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96 | }
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97 |
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98 | int VBoxSHGSMICommandDoneSynch (PVBOXSHGSMI pHeap, const VBOXSHGSMIHEADER* pHeader)
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99 | {
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100 | VBoxSHGSMICommandDoneAsynch (pHeap, pHeader);
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101 | RTSEMEVENT hEventSem = (RTSEMEVENT)pHeader->u64Info2;
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102 | int rc = RTSemEventWait(hEventSem, RT_INDEFINITE_WAIT);
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103 | AssertRC(rc);
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104 | if (RT_SUCCESS(rc))
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105 | RTSemEventDestroy(hEventSem);
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106 | return rc;
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107 | }
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108 |
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109 | void VBoxSHGSMICommandCancelAsynch (PVBOXSHGSMI pHeap, const VBOXSHGSMIHEADER* pHeader)
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110 | {
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111 | vboxSHGSMICommandRelease(pHeap, (PVBOXSHGSMIHEADER)pHeader);
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112 | }
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113 |
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114 | void VBoxSHGSMICommandCancelSynch (PVBOXSHGSMI pHeap, const VBOXSHGSMIHEADER* pHeader)
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115 | {
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116 | VBoxSHGSMICommandCancelAsynch (pHeap, pHeader);
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117 | RTSEMEVENT hEventSem = (RTSEMEVENT)pHeader->u64Info2;
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118 | RTSemEventDestroy(hEventSem);
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119 | }
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120 |
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121 | const VBOXSHGSMIHEADER* VBoxSHGSMICommandPrepAsynch (PVBOXSHGSMI pHeap, PVOID pvBuff, PFNVBOXSHGSMICMDCOMPLETION pfnCompletion, PVOID pvCompletion, uint32_t fFlags)
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122 | {
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123 | fFlags &= ~VBOXSHGSMI_FLAG_GH_ASYNCH_CALLBACK_IRQ;
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124 | PVBOXSHGSMIHEADER pHeader = VBoxSHGSMIBufferHeader (pvBuff);
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125 | pHeader->u64Info1 = (uint64_t)pfnCompletion;
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126 | pHeader->u64Info2 = (uint64_t)pvCompletion;
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127 | pHeader->fFlags = fFlags;
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128 |
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129 | return vboxSHGSMICommandPrepAsynch (pHeap, pHeader);
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130 | }
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131 |
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132 | const VBOXSHGSMIHEADER* VBoxSHGSMICommandPrepAsynchIrq (PVBOXSHGSMI pHeap, PVOID pvBuff, PFNVBOXSHGSMICMDCOMPLETION_IRQ pfnCompletion, PVOID pvCompletion, uint32_t fFlags)
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133 | {
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134 | fFlags |= VBOXSHGSMI_FLAG_GH_ASYNCH_CALLBACK_IRQ | VBOXSHGSMI_FLAG_GH_ASYNCH_IRQ;
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135 | PVBOXSHGSMIHEADER pHeader = VBoxSHGSMIBufferHeader (pvBuff);
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136 | pHeader->u64Info1 = (uint64_t)pfnCompletion;
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137 | pHeader->u64Info2 = (uint64_t)pvCompletion;
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138 | /* we must assign rather than or because flags field does not get zeroed on command creation */
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139 | pHeader->fFlags = fFlags;
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140 |
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141 | return vboxSHGSMICommandPrepAsynch (pHeap, pHeader);
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142 | }
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143 |
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144 | void* VBoxSHGSMIHeapAlloc(PVBOXSHGSMI pHeap, HGSMISIZE cbData, uint8_t u8Channel, uint16_t u16ChannelInfo)
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145 | {
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146 | KIRQL OldIrql;
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147 | void* pvData;
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148 | Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
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149 | KeAcquireSpinLock(&pHeap->HeapLock, &OldIrql);
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150 | pvData = HGSMIHeapAlloc(&pHeap->Heap, cbData, u8Channel, u16ChannelInfo);
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151 | KeReleaseSpinLock(&pHeap->HeapLock, OldIrql);
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152 | if (!pvData)
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153 | WARN(("HGSMIHeapAlloc failed!"));
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154 | return pvData;
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155 | }
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156 |
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157 | void VBoxSHGSMIHeapFree(PVBOXSHGSMI pHeap, void *pvBuffer)
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158 | {
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159 | KIRQL OldIrql;
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160 | Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
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161 | KeAcquireSpinLock(&pHeap->HeapLock, &OldIrql);
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162 | HGSMIHeapFree(&pHeap->Heap, pvBuffer);
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163 | KeReleaseSpinLock(&pHeap->HeapLock, OldIrql);
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164 | }
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165 |
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166 | void* VBoxSHGSMIHeapBufferAlloc(PVBOXSHGSMI pHeap, HGSMISIZE cbData)
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167 | {
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168 | KIRQL OldIrql;
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169 | void* pvData;
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170 | Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
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171 | KeAcquireSpinLock(&pHeap->HeapLock, &OldIrql);
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172 | pvData = HGSMIHeapBufferAlloc(&pHeap->Heap, cbData);
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173 | KeReleaseSpinLock(&pHeap->HeapLock, OldIrql);
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174 | if (!pvData)
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175 | WARN(("HGSMIHeapAlloc failed!"));
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176 | return pvData;
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177 | }
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178 |
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179 | void VBoxSHGSMIHeapBufferFree(PVBOXSHGSMI pHeap, void *pvBuffer)
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180 | {
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181 | KIRQL OldIrql;
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182 | Assert(KeGetCurrentIrql() <= DISPATCH_LEVEL);
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183 | KeAcquireSpinLock(&pHeap->HeapLock, &OldIrql);
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184 | HGSMIHeapBufferFree(&pHeap->Heap, pvBuffer);
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185 | KeReleaseSpinLock(&pHeap->HeapLock, OldIrql);
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186 | }
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187 |
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188 | int VBoxSHGSMIInit(PVBOXSHGSMI pHeap, uint32_t u32HeapType, void *pvBase, HGSMISIZE cbArea, HGSMIOFFSET offBase,
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189 | const HGSMIENV *pEnv)
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190 | {
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191 | KeInitializeSpinLock(&pHeap->HeapLock);
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192 | return HGSMIHeapSetup(&pHeap->Heap, u32HeapType, pvBase, cbArea, offBase, pEnv);
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193 | }
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194 |
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195 | void VBoxSHGSMITerm(PVBOXSHGSMI pHeap)
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196 | {
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197 | HGSMIHeapDestroy(&pHeap->Heap);
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198 | }
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199 |
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200 | void* VBoxSHGSMICommandAlloc(PVBOXSHGSMI pHeap, HGSMISIZE cbData, uint8_t u8Channel, uint16_t u16ChannelInfo)
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201 | {
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202 | /* Issue the flush command. */
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203 | PVBOXSHGSMIHEADER pHeader = (PVBOXSHGSMIHEADER)VBoxSHGSMIHeapAlloc(pHeap, cbData + sizeof (VBOXSHGSMIHEADER), u8Channel, u16ChannelInfo);
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204 | Assert(pHeader);
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205 | if (pHeader)
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206 | {
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207 | pHeader->cRefs = 1;
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208 | return VBoxSHGSMIBufferData(pHeader);
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209 | }
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210 | return NULL;
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211 | }
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212 |
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213 | void VBoxSHGSMICommandFree(PVBOXSHGSMI pHeap, void *pvBuffer)
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214 | {
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215 | PVBOXSHGSMIHEADER pHeader = VBoxSHGSMIBufferHeader(pvBuffer);
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216 | vboxSHGSMICommandRelease (pHeap, pHeader);
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217 | }
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218 |
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219 | #define VBOXSHGSMI_CMD2LISTENTRY(_pCmd) ((PVBOXVTLIST_ENTRY)&(_pCmd)->pvNext)
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220 | #define VBOXSHGSMI_LISTENTRY2CMD(_pEntry) ( (PVBOXSHGSMIHEADER)((uint8_t *)(_pEntry) - RT_OFFSETOF(VBOXSHGSMIHEADER, pvNext)) )
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221 |
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222 | int VBoxSHGSMICommandProcessCompletion (PVBOXSHGSMI pHeap, VBOXSHGSMIHEADER* pCur, bool bIrq, PVBOXVTLIST pPostProcessList)
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223 | {
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224 | int rc = VINF_SUCCESS;
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225 |
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226 | do
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227 | {
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228 | if (pCur->fFlags & VBOXSHGSMI_FLAG_GH_ASYNCH_CALLBACK_IRQ)
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229 | {
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230 | Assert(bIrq);
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231 |
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232 | PFNVBOXSHGSMICMDCOMPLETION pfnCompletion = NULL;
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233 | void *pvCompletion;
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234 | PFNVBOXSHGSMICMDCOMPLETION_IRQ pfnCallback = (PFNVBOXSHGSMICMDCOMPLETION_IRQ)pCur->u64Info1;
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235 | void *pvCallback = (void*)pCur->u64Info2;
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236 |
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237 | pfnCompletion = pfnCallback(pHeap, VBoxSHGSMIBufferData(pCur), pvCallback, &pvCompletion);
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238 | if (pfnCompletion)
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239 | {
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240 | pCur->u64Info1 = (uint64_t)pfnCompletion;
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241 | pCur->u64Info2 = (uint64_t)pvCompletion;
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242 | pCur->fFlags &= ~VBOXSHGSMI_FLAG_GH_ASYNCH_CALLBACK_IRQ;
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243 | }
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244 | else
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245 | {
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246 | /* nothing to do with this command */
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247 | break;
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248 | }
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249 | }
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250 |
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251 | if (!bIrq)
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252 | {
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253 | PFNVBOXSHGSMICMDCOMPLETION pfnCallback = (PFNVBOXSHGSMICMDCOMPLETION)pCur->u64Info1;
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254 | void *pvCallback = (void*)pCur->u64Info2;
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255 | pfnCallback(pHeap, VBoxSHGSMIBufferData(pCur), pvCallback);
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256 | }
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257 | else
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258 | vboxVtListPut(pPostProcessList, VBOXSHGSMI_CMD2LISTENTRY(pCur), VBOXSHGSMI_CMD2LISTENTRY(pCur));
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259 | } while (0);
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260 |
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261 |
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262 | return rc;
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263 | }
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264 |
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265 | int VBoxSHGSMICommandPostprocessCompletion (PVBOXSHGSMI pHeap, PVBOXVTLIST pPostProcessList)
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266 | {
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267 | PVBOXVTLIST_ENTRY pNext, pCur;
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268 | for (pCur = pPostProcessList->pFirst; pCur; pCur = pNext)
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269 | {
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270 | /* need to save next since the command may be released in a pfnCallback and thus its data might be invalid */
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271 | pNext = pCur->pNext;
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272 | PVBOXSHGSMIHEADER pCmd = VBOXSHGSMI_LISTENTRY2CMD(pCur);
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273 | PFNVBOXSHGSMICMDCOMPLETION pfnCallback = (PFNVBOXSHGSMICMDCOMPLETION)pCmd->u64Info1;
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274 | void *pvCallback = (void*)pCmd->u64Info2;
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275 | pfnCallback(pHeap, VBoxSHGSMIBufferData(pCmd), pvCallback);
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276 | }
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277 |
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278 | return VINF_SUCCESS;
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279 | }
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