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/* $Id: IOMInline.h $ */
/** @file
* IOM - Inlined functions.
*/
/*
* Copyright (C) 2006-2023 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
*/
#ifndef VMM_INCLUDED_SRC_include_IOMInline_h
#define VMM_INCLUDED_SRC_include_IOMInline_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/errcore.h>
/** @addtogroup grp_iom_int Internals
* @internal
* @{
*/
/**
* Gets the I/O port entry for the specified I/O port in the current context.
*
* @returns Pointer to I/O port entry.
* @returns NULL if no port registered.
*
* @param pVM The cross context VM structure.
* @param uPort The I/O port to lookup.
* @param poffPort Where to return the port offset relative to the
* start of the I/O port range.
* @param pidxLastHint Pointer to IOMCPU::idxIoPortLastRead or
* IOMCPU::idxIoPortLastWrite.
*
* @note In ring-0 it is possible to get an uninitialized entry (pDevIns is
* NULL, cPorts is 0), in which case there should be ring-3 handlers
* for the entry. Use IOMIOPORTENTRYR0::idxSelf to get the ring-3
* entry.
*
* @note This code is almost identical to iomMmioGetEntry, so keep in sync.
*/
DECLINLINE(CTX_SUFF(PIOMIOPORTENTRY)) iomIoPortGetEntry(PVMCC pVM, RTIOPORT uPort, PRTIOPORT poffPort, uint16_t *pidxLastHint)
{
Assert(IOM_IS_SHARED_LOCK_OWNER(pVM));
#ifdef IN_RING0
uint32_t iEnd = RT_MIN(pVM->iom.s.cIoPortLookupEntries, pVM->iomr0.s.cIoPortAlloc);
PCIOMIOPORTLOOKUPENTRY paLookup = pVM->iomr0.s.paIoPortLookup;
#else
uint32_t iEnd = pVM->iom.s.cIoPortLookupEntries;
PCIOMIOPORTLOOKUPENTRY paLookup = pVM->iom.s.paIoPortLookup;
#endif
if (iEnd > 0)
{
uint32_t iFirst = 0;
uint32_t i = *pidxLastHint;
if (i < iEnd)
{ /* likely */ }
else
i = iEnd / 2;
for (;;)
{
PCIOMIOPORTLOOKUPENTRY pCur = &paLookup[i];
if (pCur->uFirstPort > uPort)
{
if (i > iFirst)
iEnd = i;
else
break;
}
else if (pCur->uLastPort < uPort)
{
i += 1;
if (i < iEnd)
iFirst = i;
else
break;
}
else
{
*pidxLastHint = (uint16_t)i;
*poffPort = uPort - pCur->uFirstPort;
/*
* Translate the 'idx' member into a pointer.
*/
size_t const idx = pCur->idx;
#ifdef IN_RING0
AssertMsg(idx < pVM->iom.s.cIoPortRegs && idx < pVM->iomr0.s.cIoPortAlloc,
("%#zx vs %#x/%x (port %#x)\n", idx, pVM->iom.s.cIoPortRegs, pVM->iomr0.s.cIoPortMax, uPort));
if (idx < pVM->iomr0.s.cIoPortAlloc)
return &pVM->iomr0.s.paIoPortRegs[idx];
#else
if (idx < pVM->iom.s.cIoPortRegs)
return &pVM->iom.s.paIoPortRegs[idx];
AssertMsgFailed(("%#zx vs %#x (port %#x)\n", idx, pVM->iom.s.cIoPortRegs, uPort));
#endif
break;
}
i = iFirst + (iEnd - iFirst) / 2;
}
}
*poffPort = 0;
return NULL;
}
#ifdef VBOX_WITH_STATISTICS
/**
* Gets the statistics entry for an I/O port.
*
* @returns Pointer to stats. Instead of NULL, a pointer to IoPortDummyStats is
* returned, so the caller does not need to check for NULL.
*
* @param pVM The cross context VM structure.
* @param pRegEntry The I/O port entry to get stats for.
* @param offPort The offset of the port relative to the start of the
* registration entry.
*/
DECLINLINE(PIOMIOPORTSTATSENTRY) iomIoPortGetStats(PVMCC pVM, CTX_SUFF(PIOMIOPORTENTRY) pRegEntry, uint16_t offPort)
{
size_t idxStats = pRegEntry->idxStats;
idxStats += offPort;
# ifdef IN_RING0
if (idxStats < pVM->iomr0.s.cIoPortStatsAllocation)
return &pVM->iomr0.s.paIoPortStats[idxStats];
# else
if (idxStats < pVM->iom.s.cIoPortStats)
return &pVM->iom.s.paIoPortStats[idxStats];
# endif
return &pVM->iom.s.IoPortDummyStats;
}
#endif
/**
* Gets the MMIO region entry for the specified address in the current context.
*
* @returns Pointer to MMIO region entry.
* @returns NULL if no MMIO region registered for the given address.
*
* @param pVM The cross context VM structure.
* @param GCPhys The address to lookup.
* @param poffRegion Where to return the byte offset into the MMIO
* region that corresponds to @a GCPhys.
* @param pidxLastHint Pointer to IOMCPU::idxMmioLastRead,
* IOMCPU::idxMmioLastWrite, or similar.
*
* @note In ring-0 it is possible to get an uninitialized entry (pDevIns is
* NULL, cbRegion is 0), in which case there should be ring-3 handlers
* for the entry. Use IOMMMIOENTRYR0::idxSelf to get the ring-3 entry.
*
* @note This code is almost identical to iomIoPortGetEntry, so keep in sync.
*/
DECLINLINE(CTX_SUFF(PIOMMMIOENTRY)) iomMmioGetEntry(PVMCC pVM, RTGCPHYS GCPhys, PRTGCPHYS poffRegion, uint16_t *pidxLastHint)
{
Assert(IOM_IS_SHARED_LOCK_OWNER(pVM));
#ifdef IN_RING0
uint32_t iEnd = RT_MIN(pVM->iom.s.cMmioLookupEntries, pVM->iomr0.s.cMmioAlloc);
PCIOMMMIOLOOKUPENTRY paLookup = pVM->iomr0.s.paMmioLookup;
#else
uint32_t iEnd = pVM->iom.s.cMmioLookupEntries;
PCIOMMMIOLOOKUPENTRY paLookup = pVM->iom.s.paMmioLookup;
#endif
if (iEnd > 0)
{
uint32_t iFirst = 0;
uint32_t i = *pidxLastHint;
if (i < iEnd)
{ /* likely */ }
else
i = iEnd / 2;
for (;;)
{
PCIOMMMIOLOOKUPENTRY pCur = &paLookup[i];
if (pCur->GCPhysFirst > GCPhys)
{
if (i > iFirst)
iEnd = i;
else
break;
}
else if (pCur->GCPhysLast < GCPhys)
{
i += 1;
if (i < iEnd)
iFirst = i;
else
break;
}
else
{
*pidxLastHint = (uint16_t)i;
*poffRegion = GCPhys - pCur->GCPhysFirst;
/*
* Translate the 'idx' member into a pointer.
*/
size_t const idx = pCur->idx;
#ifdef IN_RING0
AssertMsg(idx < pVM->iom.s.cMmioRegs && idx < pVM->iomr0.s.cMmioAlloc,
("%#zx vs %#x/%x (GCPhys=%RGp)\n", idx, pVM->iom.s.cMmioRegs, pVM->iomr0.s.cMmioMax, GCPhys));
if (idx < pVM->iomr0.s.cMmioAlloc)
return &pVM->iomr0.s.paMmioRegs[idx];
#else
if (idx < pVM->iom.s.cMmioRegs)
return &pVM->iom.s.paMmioRegs[idx];
AssertMsgFailed(("%#zx vs %#x (GCPhys=%RGp)\n", idx, pVM->iom.s.cMmioRegs, GCPhys));
#endif
break;
}
i = iFirst + (iEnd - iFirst) / 2;
}
}
*poffRegion = 0;
return NULL;
}
#ifdef VBOX_WITH_STATISTICS
/**
* Gets the statistics entry for an MMIO region.
*
* @returns Pointer to stats. Instead of NULL, a pointer to MmioDummyStats is
* returned, so the caller does not need to check for NULL.
*
* @param pVM The cross context VM structure.
* @param pRegEntry The I/O port entry to get stats for.
*/
DECLINLINE(PIOMMMIOSTATSENTRY) iomMmioGetStats(PVMCC pVM, CTX_SUFF(PIOMMMIOENTRY) pRegEntry)
{
size_t idxStats = pRegEntry->idxStats;
# ifdef IN_RING0
if (idxStats < pVM->iomr0.s.cMmioStatsAllocation)
return &pVM->iomr0.s.paMmioStats[idxStats];
# else
if (idxStats < pVM->iom.s.cMmioStats)
return &pVM->iom.s.paMmioStats[idxStats];
# endif
return &pVM->iom.s.MmioDummyStats;
}
#endif
/** @} */
#endif /* !VMM_INCLUDED_SRC_include_IOMInline_h */
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