| 1 | /* $Id: PDMAllTask.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * PDM Task - Asynchronous user mode tasks, all context code.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2019-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*********************************************************************************************************************************
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| 20 | * Header Files *
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| 21 | *********************************************************************************************************************************/
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| 22 | #define LOG_GROUP LOG_GROUP_PDM_TASK
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| 23 | #include "PDMInternal.h"
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| 24 | #include <VBox/vmm/pdmtask.h>
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| 25 | #include <VBox/vmm/gvm.h>
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| 26 | #include <VBox/err.h>
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| 27 |
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| 28 | #include <VBox/log.h>
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| 29 | #include <VBox/sup.h>
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| 30 | #include <iprt/asm.h>
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| 31 | #include <iprt/assert.h>
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| 32 | #include <iprt/semaphore.h>
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| 33 |
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| 34 |
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| 35 |
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| 36 | /**
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| 37 | * Triggers a task.
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| 38 | *
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| 39 | * @returns VBox status code.
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| 40 | * @retval VINF_ALREADY_POSTED is the task is already pending.
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| 41 | *
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| 42 | * @param pVM The cross context VM structure.
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| 43 | * @param enmType The task owner type.
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| 44 | * @param pvOwner The task owner.
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| 45 | * @param hTask The task to trigger.
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| 46 | * @thread Any
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| 47 | */
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| 48 | VMM_INT_DECL(int) PDMTaskTrigger(PVMCC pVM, PDMTASKTYPE enmType, RTR3PTR pvOwner, PDMTASKHANDLE hTask)
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| 49 | {
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| 50 | /*
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| 51 | * Validate input and translate the handle to a task.
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| 52 | */
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| 53 | AssertReturn(pvOwner, VERR_NOT_OWNER);
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| 54 | AssertReturn(enmType >= PDMTASKTYPE_DEV && enmType <= PDMTASKTYPE_INTERNAL, VERR_NOT_OWNER);
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| 55 |
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| 56 | size_t const iTask = hTask % RT_ELEMENTS(pVM->pdm.s.aTaskSets[0].aTasks);
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| 57 | size_t const iTaskSet = hTask / RT_ELEMENTS(pVM->pdm.s.aTaskSets[0].aTasks);
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| 58 | #ifdef IN_RING3
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| 59 | AssertReturn(iTaskSet < RT_ELEMENTS(pVM->pdm.s.apTaskSets), VERR_INVALID_HANDLE);
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| 60 | PPDMTASKSET pTaskSet = pVM->pdm.s.apTaskSets[iTaskSet];
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| 61 | AssertReturn(pTaskSet, VERR_INVALID_HANDLE);
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| 62 | #else
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| 63 | AssertReturn(iTaskSet < RT_ELEMENTS(pVM->pdm.s.aTaskSets),
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| 64 | iTaskSet < RT_ELEMENTS(pVM->pdm.s.apTaskSets) ? VERR_INVALID_CONTEXT : VERR_INVALID_HANDLE);
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| 65 | PPDMTASKSET pTaskSet = &pVM->pdm.s.aTaskSets[iTaskSet];
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| 66 | #endif
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| 67 | AssertReturn(pTaskSet->u32Magic == PDMTASKSET_MAGIC, VERR_INVALID_MAGIC);
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| 68 | PPDMTASK pTask = &pTaskSet->aTasks[iTask];
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| 69 |
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| 70 | /*
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| 71 | * Check task ownership.
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| 72 | */
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| 73 | AssertReturn(pvOwner == pTask->pvOwner, VERR_NOT_OWNER);
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| 74 | AssertReturn(enmType == pTask->enmType, VERR_NOT_OWNER);
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| 75 |
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| 76 | /*
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| 77 | * Trigger the task, wake up the thread if the task isn't triggered yet.
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| 78 | */
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| 79 | if (!ASMAtomicBitTestAndSet(&pTaskSet->fTriggered, (uint32_t)iTask))
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| 80 | {
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| 81 | Log(("PDMTaskTrigger: Triggered %RU64 (%s)\n", hTask, R3STRING(pTask->pszName)));
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| 82 | #ifdef IN_RING3
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| 83 | if (pTaskSet->hEventR3 != NIL_RTSEMEVENT)
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| 84 | {
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| 85 | int rc = RTSemEventSignal(pTaskSet->hEventR3);
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| 86 | AssertLogRelRCReturn(rc, rc);
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| 87 | }
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| 88 | else
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| 89 | #endif
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| 90 | {
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| 91 | int rc = SUPSemEventSignal(pVM->pSession, pTaskSet->hEventR0);
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| 92 | AssertLogRelRCReturn(rc, rc);
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| 93 | }
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| 94 | return VINF_SUCCESS;
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| 95 | }
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| 96 | ASMAtomicIncU32(&pTask->cAlreadyTrigged);
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| 97 | Log(("PDMTaskTrigger: %RU64 (%s) was already triggered\n", hTask, R3STRING(pTask->pszName)));
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| 98 | return VINF_ALREADY_POSTED;
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| 99 | }
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| 100 |
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| 101 |
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| 102 | /**
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| 103 | * Triggers an internal task.
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| 104 | *
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| 105 | * @returns VBox status code.
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| 106 | * @param pVM The cross context VM structure.
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| 107 | * @param hTask The task to trigger.
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| 108 | * @thread Any
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| 109 | */
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| 110 | VMM_INT_DECL(int) PDMTaskTriggerInternal(PVMCC pVM, PDMTASKHANDLE hTask)
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| 111 | {
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| 112 | return PDMTaskTrigger(pVM, PDMTASKTYPE_INTERNAL, pVM->pVMR3, hTask);
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| 113 | }
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| 114 |
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