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/* $Id: PDMR0Driver.cpp $ */
/** @file
* PDM - Pluggable Device and Driver Manager, R0 Driver parts.
*/
/*
* Copyright (C) 2010-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_PDM_DRIVER
#include "PDMInternal.h"
#include <VBox/vmm/pdm.h>
#include <VBox/vmm/vmcc.h>
#include <VBox/vmm/gvmm.h>
#include <VBox/log.h>
#include <iprt/errcore.h>
#include <iprt/assert.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
RT_C_DECLS_BEGIN
extern DECLEXPORT(const PDMDRVHLPR0) g_pdmR0DrvHlp;
RT_C_DECLS_END
/** @name Ring-0 Context Driver Helpers
* @{
*/
/** @interface_method_impl{PDMDRVHLPR0,pfnAssertEMT} */
static DECLCALLBACK(bool) pdmR0DrvHlp_AssertEMT(PPDMDRVINS pDrvIns, const char *pszFile, unsigned iLine, const char *pszFunction)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
if (VM_IS_EMT(pDrvIns->Internal.s.pVMR0))
return true;
RTAssertMsg1Weak("AssertEMT", iLine, pszFile, pszFunction);
RTAssertPanic();
return false;
}
/** @interface_method_impl{PDMDRVHLPR0,pfnAssertOther} */
static DECLCALLBACK(bool) pdmR0DrvHlp_AssertOther(PPDMDRVINS pDrvIns, const char *pszFile, unsigned iLine, const char *pszFunction)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
if (!VM_IS_EMT(pDrvIns->Internal.s.pVMR0))
return true;
RTAssertMsg1Weak("AssertOther", iLine, pszFile, pszFunction);
RTAssertPanic();
return false;
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectEnter} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectEnter(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect, int rcBusy)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectEnter(pDrvIns->Internal.s.pVMR0, pCritSect, rcBusy);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectEnterDebug} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectEnterDebug(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect, int rcBusy,
RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectEnterDebug(pDrvIns->Internal.s.pVMR0, pCritSect, rcBusy, uId, RT_SRC_POS_ARGS);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectTryEnter} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectTryEnter(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectTryEnter(pDrvIns->Internal.s.pVMR0, pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectTryEnterDebug} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectTryEnterDebug(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect,
RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectTryEnterDebug(pDrvIns->Internal.s.pVMR0, pCritSect, uId, RT_SRC_POS_ARGS);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectLeave} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectLeave(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectLeave(pDrvIns->Internal.s.pVMR0, pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectIsOwner} */
static DECLCALLBACK(bool) pdmR0DrvHlp_CritSectIsOwner(PPDMDRVINS pDrvIns, PCPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectIsOwner(pDrvIns->Internal.s.pVMR0, pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectIsInitialized} */
static DECLCALLBACK(bool) pdmR0DrvHlp_CritSectIsInitialized(PPDMDRVINS pDrvIns, PCPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
NOREF(pDrvIns);
return PDMCritSectIsInitialized(pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectHasWaiters} */
static DECLCALLBACK(bool) pdmR0DrvHlp_CritSectHasWaiters(PPDMDRVINS pDrvIns, PCPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
return PDMCritSectHasWaiters(pDrvIns->Internal.s.pVMR0, pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectGetRecursion} */
static DECLCALLBACK(uint32_t) pdmR0DrvHlp_CritSectGetRecursion(PPDMDRVINS pDrvIns, PCPDMCRITSECT pCritSect)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
NOREF(pDrvIns);
return PDMCritSectGetRecursion(pCritSect);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnCritSectScheduleExitEvent} */
static DECLCALLBACK(int) pdmR0DrvHlp_CritSectScheduleExitEvent(PPDMDRVINS pDrvIns, PPDMCRITSECT pCritSect,
SUPSEMEVENT hEventToSignal)
{
PDMDRV_ASSERT_DRVINS(pDrvIns);
NOREF(pDrvIns);
return PDMHCCritSectScheduleExitEvent(pCritSect, hEventToSignal);
}
/** @interface_method_impl{PDMDRVHLPR0,pfnNetShaperAllocateBandwidth} */
static DECLCALLBACK(bool) pdmR0DrvHlp_NetShaperAllocateBandwidth(PPDMDRVINS pDrvIns, PPDMNSFILTER pFilter, size_t cbTransfer)
{
#ifdef VBOX_WITH_NETSHAPER
PDMDRV_ASSERT_DRVINS(pDrvIns);
LogFlow(("pdmR0DrvHlp_NetShaperDetach: caller='%s'/%d: pFilter=%p cbTransfer=%#zx\n",
pDrvIns->pReg->szName, pDrvIns->iInstance, pFilter, cbTransfer));
bool const fRc = PDMNetShaperAllocateBandwidth(pDrvIns->Internal.s.pVMR0, pFilter, cbTransfer);
LogFlow(("pdmR0DrvHlp_NetShaperDetach: caller='%s'/%d: returns %RTbool\n", pDrvIns->pReg->szName, pDrvIns->iInstance, fRc));
return fRc;
#else
RT_NOREF(pDrvIns, pFilter, cbTransfer);
return true;
#endif
}
/**
* The Ring-0 Context Driver Helper Callbacks.
*/
extern DECLEXPORT(const PDMDRVHLPR0) g_pdmR0DrvHlp =
{
PDM_DRVHLPRC_VERSION,
pdmR0DrvHlp_AssertEMT,
pdmR0DrvHlp_AssertOther,
pdmR0DrvHlp_CritSectEnter,
pdmR0DrvHlp_CritSectEnterDebug,
pdmR0DrvHlp_CritSectTryEnter,
pdmR0DrvHlp_CritSectTryEnterDebug,
pdmR0DrvHlp_CritSectLeave,
pdmR0DrvHlp_CritSectIsOwner,
pdmR0DrvHlp_CritSectIsInitialized,
pdmR0DrvHlp_CritSectHasWaiters,
pdmR0DrvHlp_CritSectGetRecursion,
pdmR0DrvHlp_CritSectScheduleExitEvent,
pdmR0DrvHlp_NetShaperAllocateBandwidth,
PDM_DRVHLPRC_VERSION
};
/** @} */
/**
* PDMDrvHlpCallR0 helper.
*
* @returns See PFNPDMDRVREQHANDLERR0.
* @param pGVM The global (ring-0) VM structure. (For validation.)
* @param pReq Pointer to the request buffer.
*/
VMMR0_INT_DECL(int) PDMR0DriverCallReqHandler(PGVM pGVM, PPDMDRIVERCALLREQHANDLERREQ pReq)
{
/*
* Validate input and make the call.
*/
int rc = GVMMR0ValidateGVM(pGVM);
if (RT_SUCCESS(rc))
{
AssertPtrReturn(pReq, VERR_INVALID_POINTER);
AssertMsgReturn(pReq->Hdr.cbReq == sizeof(*pReq), ("%#x != %#x\n", pReq->Hdr.cbReq, sizeof(*pReq)), VERR_INVALID_PARAMETER);
PPDMDRVINS pDrvIns = pReq->pDrvInsR0;
AssertPtrReturn(pDrvIns, VERR_INVALID_POINTER);
AssertReturn(pDrvIns->Internal.s.pVMR0 == pGVM, VERR_INVALID_PARAMETER);
PFNPDMDRVREQHANDLERR0 pfnReqHandlerR0 = pDrvIns->Internal.s.pfnReqHandlerR0;
AssertPtrReturn(pfnReqHandlerR0, VERR_INVALID_POINTER);
rc = pfnReqHandlerR0(pDrvIns, pReq->uOperation, pReq->u64Arg);
}
return rc;
}
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