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/* $Id: SUPDrv-os2.cpp $ */
/** @file
* VBoxDrv - The VirtualBox Support Driver - OS/2 specifics.
*/
/*
* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_SUP_DRV
#define __STDC_CONSTANT_MACROS
#define __STDC_LIMIT_MACROS
#include <os2ddk/bsekee.h>
#undef RT_MAX
#include "SUPDrvInternal.h"
#include <VBox/version.h>
#include <iprt/initterm.h>
#include <iprt/string.h>
#include <iprt/spinlock.h>
#include <iprt/process.h>
#include <iprt/assert.h>
#include <VBox/log.h>
#include <iprt/param.h>
#include <VBox/version.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/**
* Device extention & session data association structure.
*/
static SUPDRVDEVEXT g_DevExt;
/** Spinlock protecting g_apSessionHashTab. */
static RTSPINLOCK g_Spinlock = NIL_RTSPINLOCK;
/** Hash table */
static PSUPDRVSESSION g_apSessionHashTab[19];
/** Calculates the index into g_apSessionHashTab.*/
#define SESSION_HASH(sfn) ((sfn) % RT_ELEMENTS(g_apSessionHashTab))
RT_C_DECLS_BEGIN
/* Defined in SUPDrvA-os2.asm */
extern uint16_t g_offLogHead;
extern uint16_t volatile g_offLogTail;
extern uint16_t const g_cchLogMax;
extern char g_szLog[];
/* (init only:) */
extern char g_szInitText[];
extern uint16_t g_cchInitText;
extern uint16_t g_cchInitTextMax;
RT_C_DECLS_END
/*********************************************************************************************************************************
* Internal Functions *
*********************************************************************************************************************************/
/**
* 32-bit Ring-0 initialization.
*
* @returns 0 on success, non-zero on failure.
* @param pszArgs Pointer to the device arguments.
*/
DECLASM(int) VBoxDrvInit(const char *pszArgs)
{
/*
* Initialize the runtime.
*/
int rc = RTR0Init(0);
if (RT_SUCCESS(rc))
{
Log(("VBoxDrvInit: pszArgs=%s\n", pszArgs));
/*
* Initialize the device extension.
*/
rc = supdrvInitDevExt(&g_DevExt, sizeof(SUPDRVSESSION));
if (RT_SUCCESS(rc))
{
/*
* Initialize the session hash table.
*/
rc = RTSpinlockCreate(&g_Spinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxDrvOS2");
if (RT_SUCCESS(rc))
{
/*
* Process the commandline. Later.
*/
bool fVerbose = true;
/*
* Success
*/
if (fVerbose)
{
strcpy(&g_szInitText[0],
"\r\n"
"VirtualBox.org Support Driver for OS/2 version " VBOX_VERSION_STRING "\r\n"
"Copyright (C) 2007 Knut St. Osmundsen\r\n"
"Copyright (C) 2007-" VBOX_C_YEAR " Oracle Corporation\r\n");
g_cchInitText = strlen(&g_szInitText[0]);
}
return VINF_SUCCESS;
}
g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: RTSpinlockCreate failed, rc=%Rrc\n", rc);
supdrvDeleteDevExt(&g_DevExt);
}
else
g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: supdrvInitDevExt failed, rc=%Rrc\n", rc);
RTR0Term();
}
else
g_cchInitText = RTStrPrintf(&g_szInitText[0], g_cchInitTextMax, "VBoxDrv.sys: RTR0Init failed, rc=%Rrc\n", rc);
return rc;
}
DECLASM(int) VBoxDrvOpen(uint16_t sfn)
{
int rc;
PSUPDRVSESSION pSession;
/*
* Create a new session.
*/
rc = supdrvCreateSession(&g_DevExt, true /* fUser */, true /*fUnrestricted*/, &pSession);
if (RT_SUCCESS(rc))
{
pSession->sfn = sfn;
/*
* Insert it into the hash table.
*/
unsigned iHash = SESSION_HASH(sfn);
RTSpinlockAcquire(g_Spinlock);
pSession->pNextHash = g_apSessionHashTab[iHash];
g_apSessionHashTab[iHash] = pSession;
RTSpinlockRelease(g_Spinlock);
}
Log(("VBoxDrvOpen: g_DevExt=%p pSession=%p rc=%d pid=%d\n", &g_DevExt, pSession, rc, (int)RTProcSelf()));
return rc;
}
DECLASM(int) VBoxDrvClose(uint16_t sfn)
{
Log(("VBoxDrvClose: pid=%d sfn=%d\n", (int)RTProcSelf(), sfn));
/*
* Remove from the hash table.
*/
PSUPDRVSESSION pSession;
const RTPROCESS Process = RTProcSelf();
const unsigned iHash = SESSION_HASH(sfn);
RTSpinlockAcquire(g_Spinlock);
pSession = g_apSessionHashTab[iHash];
if (pSession)
{
if ( pSession->sfn == sfn
&& pSession->Process == Process)
{
g_apSessionHashTab[iHash] = pSession->pNextHash;
pSession->pNextHash = NULL;
}
else
{
PSUPDRVSESSION pPrev = pSession;
pSession = pSession->pNextHash;
while (pSession)
{
if ( pSession->sfn == sfn
&& pSession->Process == Process)
{
pPrev->pNextHash = pSession->pNextHash;
pSession->pNextHash = NULL;
break;
}
/* next */
pPrev = pSession;
pSession = pSession->pNextHash;
}
}
}
RTSpinlockRelease(g_Spinlock);
if (!pSession)
{
OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d sfn=%d\n", (int)Process, sfn));
return VERR_INVALID_PARAMETER;
}
/*
* Close the session.
*/
supdrvSessionRelease(pSession);
return 0;
}
DECLASM(int) VBoxDrvIOCtlFast(uint16_t sfn, uint8_t iFunction)
{
/*
* Find the session.
*/
const RTPROCESS Process = RTProcSelf();
const unsigned iHash = SESSION_HASH(sfn);
PSUPDRVSESSION pSession;
RTSpinlockAcquire(g_Spinlock);
pSession = g_apSessionHashTab[iHash];
if (pSession && pSession->Process != Process)
{
do pSession = pSession->pNextHash;
while ( pSession
&& ( pSession->sfn != sfn
|| pSession->Process != Process));
if (RT_LIKELY(pSession))
supdrvSessionRetain(pSession);
}
RTSpinlockRelease(g_Spinlock);
if (RT_UNLIKELY(!pSession))
{
OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
return VERR_INVALID_PARAMETER;
}
/*
* Dispatch the fast IOCtl.
*/
int rc;
if ((unsigned)(iFunction - SUP_IOCTL_FAST_DO_FIRST) < (unsigned)32)
rc = supdrvIOCtlFast(iFunction, 0, &g_DevExt, pSession);
else
rc = VERR_INVALID_FUNCTION;
supdrvSessionRelease(pSession);
return rc;
}
DECLASM(int) VBoxDrvIOCtl(uint16_t sfn, uint8_t iCat, uint8_t iFunction, void *pvParm, void *pvData, uint16_t *pcbParm, uint16_t *pcbData)
{
/*
* Find the session.
*/
const RTPROCESS Process = RTProcSelf();
const unsigned iHash = SESSION_HASH(sfn);
PSUPDRVSESSION pSession;
RTSpinlockAcquire(g_Spinlock);
pSession = g_apSessionHashTab[iHash];
if (pSession && pSession->Process != Process)
{
do pSession = pSession->pNextHash;
while ( pSession
&& ( pSession->sfn != sfn
|| pSession->Process != Process));
if (RT_LIKELY(pSession))
supdrvSessionRetain(pSession);
}
RTSpinlockRelease(g_Spinlock);
if (!pSession)
{
OSDBGPRINT(("VBoxDrvIoctl: WHUT?!? pSession == NULL! This must be a mistake... pid=%d\n", (int)Process));
return VERR_INVALID_PARAMETER;
}
/*
* Verify the category and dispatch the IOCtl.
*/
int rc;
if (RT_LIKELY(iCat == SUP_CTL_CATEGORY))
{
Log(("VBoxDrvIOCtl: pSession=%p iFunction=%#x pvParm=%p pvData=%p *pcbParm=%d *pcbData=%d\n", pSession, iFunction, pvParm, pvData, *pcbParm, *pcbData));
Assert(pvParm);
Assert(!pvData);
/*
* Lock the header.
*/
PSUPREQHDR pHdr = (PSUPREQHDR)pvParm;
AssertReturn(*pcbParm == sizeof(*pHdr), VERR_INVALID_PARAMETER);
KernVMLock_t Lock;
rc = KernVMLock(VMDHL_WRITE, pHdr, *pcbParm, &Lock, (KernPageList_t *)-1, NULL);
AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, *pcbParm, &Lock, rc), VERR_LOCK_FAILED);
/*
* Validate the header.
*/
if (RT_LIKELY((pHdr->fFlags & SUPREQHDR_FLAGS_MAGIC_MASK) == SUPREQHDR_FLAGS_MAGIC))
{
uint32_t cbReq = RT_MAX(pHdr->cbIn, pHdr->cbOut);
if (RT_LIKELY( pHdr->cbIn >= sizeof(*pHdr)
&& pHdr->cbOut >= sizeof(*pHdr)
&& cbReq <= _1M*16))
{
/*
* Lock the rest of the buffer if necessary.
*/
if (((uintptr_t)pHdr & PAGE_OFFSET_MASK) + cbReq > PAGE_SIZE)
{
rc = KernVMUnlock(&Lock);
AssertMsgReturn(!rc, ("KernVMUnlock(Lock) -> %#x\n", rc), VERR_LOCK_FAILED);
rc = KernVMLock(VMDHL_WRITE, pHdr, cbReq, &Lock, (KernPageList_t *)-1, NULL);
AssertMsgReturn(!rc, ("KernVMLock(VMDHL_WRITE, %p, %#x, &p, NULL, NULL) -> %d\n", pHdr, cbReq, &Lock, rc), VERR_LOCK_FAILED);
}
/*
* Process the IOCtl.
*/
rc = supdrvIOCtl(iFunction, &g_DevExt, pSession, pHdr, cbReq);
}
else
{
OSDBGPRINT(("VBoxDrvIOCtl: max(%#x,%#x); iCmd=%#x\n", pHdr->cbIn, pHdr->cbOut, iFunction));
rc = VERR_INVALID_PARAMETER;
}
}
else
{
OSDBGPRINT(("VBoxDrvIOCtl: bad magic fFlags=%#x; iCmd=%#x\n", pHdr->fFlags, iFunction));
rc = VERR_INVALID_PARAMETER;
}
/*
* Unlock and return.
*/
int rc2 = KernVMUnlock(&Lock);
AssertMsg(!rc2, ("rc2=%d\n", rc2)); NOREF(rc2);
}
else
rc = VERR_NOT_SUPPORTED;
supdrvSessionRelease(pSession);
Log2(("VBoxDrvIOCtl: returns %d\n", rc));
return rc;
}
void VBOXCALL supdrvOSCleanupSession(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession)
{
NOREF(pDevExt);
NOREF(pSession);
}
void VBOXCALL supdrvOSSessionHashTabInserted(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser)
{
NOREF(pDevExt); NOREF(pSession); NOREF(pvUser);
}
void VBOXCALL supdrvOSSessionHashTabRemoved(PSUPDRVDEVEXT pDevExt, PSUPDRVSESSION pSession, void *pvUser)
{
NOREF(pDevExt); NOREF(pSession); NOREF(pvUser);
}
void VBOXCALL supdrvOSObjInitCreator(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession)
{
NOREF(pObj);
NOREF(pSession);
}
bool VBOXCALL supdrvOSObjCanAccess(PSUPDRVOBJ pObj, PSUPDRVSESSION pSession, const char *pszObjName, int *prc)
{
NOREF(pObj);
NOREF(pSession);
NOREF(pszObjName);
NOREF(prc);
return false;
}
bool VBOXCALL supdrvOSGetForcedAsyncTscMode(PSUPDRVDEVEXT pDevExt)
{
NOREF(pDevExt);
return false;
}
bool VBOXCALL supdrvOSAreCpusOfflinedOnSuspend(void)
{
return false;
}
bool VBOXCALL supdrvOSAreTscDeltasInSync(void)
{
return false;
}
int VBOXCALL supdrvOSLdrOpen(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename)
{
NOREF(pDevExt); NOREF(pImage); NOREF(pszFilename);
return VERR_NOT_SUPPORTED;
}
int VBOXCALL supdrvOSLdrValidatePointer(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, void *pv,
const uint8_t *pbImageBits, const char *pszSymbol)
{
NOREF(pDevExt); NOREF(pImage); NOREF(pv); NOREF(pbImageBits); NOREF(pszSymbol);
return VERR_NOT_SUPPORTED;
}
int VBOXCALL supdrvOSLdrLoad(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const uint8_t *pbImageBits, PSUPLDRLOAD pReq)
{
NOREF(pDevExt); NOREF(pImage); NOREF(pbImageBits); NOREF(pReq);
return VERR_NOT_SUPPORTED;
}
void VBOXCALL supdrvOSLdrUnload(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
{
NOREF(pDevExt); NOREF(pImage);
}
void VBOXCALL supdrvOSLdrNotifyOpened(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage, const char *pszFilename)
{
NOREF(pDevExt); NOREF(pImage); NOREF(pszFilename);
}
void VBOXCALL supdrvOSLdrNotifyUnloaded(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
{
NOREF(pDevExt); NOREF(pImage);
}
int VBOXCALL supdrvOSLdrQuerySymbol(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage,
const char *pszSymbol, size_t cchSymbol, void **ppvSymbol)
{
RT_NOREF(pDevExt, pImage, pszSymbol, cchSymbol, ppvSymbol);
return VERR_WRONG_ORDER;
}
void VBOXCALL supdrvOSLdrRetainWrapperModule(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
{
RT_NOREF(pDevExt, pImage);
AssertFailed();
}
void VBOXCALL supdrvOSLdrReleaseWrapperModule(PSUPDRVDEVEXT pDevExt, PSUPDRVLDRIMAGE pImage)
{
RT_NOREF(pDevExt, pImage);
AssertFailed();
}
#ifdef SUPDRV_WITH_MSR_PROBER
int VBOXCALL supdrvOSMsrProberRead(uint32_t uMsr, RTCPUID idCpu, uint64_t *puValue)
{
NOREF(uMsr); NOREF(idCpu); NOREF(puValue);
return VERR_NOT_SUPPORTED;
}
int VBOXCALL supdrvOSMsrProberWrite(uint32_t uMsr, RTCPUID idCpu, uint64_t uValue)
{
NOREF(uMsr); NOREF(idCpu); NOREF(uValue);
return VERR_NOT_SUPPORTED;
}
int VBOXCALL supdrvOSMsrProberModify(RTCPUID idCpu, PSUPMSRPROBER pReq)
{
NOREF(idCpu); NOREF(pReq);
return VERR_NOT_SUPPORTED;
}
#endif /* SUPDRV_WITH_MSR_PROBER */
/**
* Callback for writing to the log buffer.
*
* @returns number of bytes written.
* @param pvArg Unused.
* @param pachChars Pointer to an array of utf-8 characters.
* @param cbChars Number of bytes in the character array pointed to by pachChars.
*/
static DECLCALLBACK(size_t) VBoxDrvLogOutput(void *pvArg, const char *pachChars, size_t cbChars)
{
size_t cchWritten = 0;
while (cbChars-- > 0)
{
const uint16_t offLogHead = g_offLogHead;
const uint16_t offLogHeadNext = (offLogHead + 1) & (g_cchLogMax - 1);
if (offLogHeadNext == g_offLogTail)
break; /* no */
g_szLog[offLogHead] = *pachChars++;
g_offLogHead = offLogHeadNext;
cchWritten++;
}
return cchWritten;
}
SUPR0DECL(int) SUPR0PrintfV(const char *pszFormat, va_list va)
{
#if 0 //def DEBUG_bird
va_list va2;
va_copy(va2, va);
RTLogComPrintfV(pszFormat, va2);
va_end(va2);
#endif
RTLogFormatV(VBoxDrvLogOutput, NULL, pszFormat, va);
return 0;
}
SUPR0DECL(uint32_t) SUPR0GetKernelFeatures(void)
{
return 0;
}
SUPR0DECL(bool) SUPR0FpuBegin(bool fCtxHook)
{
RT_NOREF(fCtxHook);
return false;
}
SUPR0DECL(void) SUPR0FpuEnd(bool fCtxHook)
{
RT_NOREF(fCtxHook);
}
|