IMG_VOID
TLStreamClose(IMG_HANDLE hStream)
{
PTL_STREAM psTmp;
PVR_DPF_ENTERED;
if ( IMG_NULL == hStream )
{
PVR_DPF((PVR_DBG_WARNING,
"TLStreamClose failed as NULL stream handler passed, nothing done.\n"));
PVR_DPF_RETURN;
}
psTmp = (PTL_STREAM)hStream;
/* Decrement reference counter */
//Thread Safety: Not yet implemented OSLockAcquire(psTmp->hLock);
psTmp->uiRefCount--;
//Thread Safety: Not yet implemented OSLockRelease(psTmp->hLock);
/* The stream is still being used in other context(s) do not destroy anything */
if ( 0 != psTmp->uiRefCount )
{
PVR_DPF_RETURN;
}
else
{
if ( psTmp->bWaitForEmptyOnDestroy == IMG_TRUE )
{
while (psTmp->ui32Read != psTmp->ui32Write)
{
OSEventObjectWaitTimeout(psTmp->hProducerEvent,
EVENT_OBJECT_TIMEOUT_MS);
}
}
/* First remove it from the global structures to prevent access
* while it is being free'd. Lock it?
*/
TLRemoveStreamAndTryFreeStreamNode(psTmp->psNode);
//Thread Safety: Not yet implemented OSLockDestroy(psTmp->hLock);
// In block-while-reserve streams those not be NULL
if ( IMG_TRUE == psTmp->bBlock )
{
OSEventObjectClose(psTmp->hProducerEvent);
OSEventObjectDestroy(psTmp->hProducerEventObj);
}
DevmemUnexport(psTmp->psStreamMemDesc, &psTmp->sExportCookie);
DevmemReleaseCpuVirtAddr(psTmp->psStreamMemDesc);
DevmemFree(psTmp->psStreamMemDesc);
OSFREEMEM(psTmp);
PVR_DPF_RETURN;
}
}
static IMG_VOID RemoveAndFreeStreamNode(PTL_SNODE psRemove)
{
TL_GLOBAL_DATA* psGD = TLGGD();
PTL_SNODE* last;
PTL_SNODE psn;
PVRSRV_ERROR eError;
PVR_DPF_ENTERED;
// Unlink the stream node from the master list
PVR_ASSERT(psGD->psHead);
last = &psGD->psHead;
for (psn = psGD->psHead; psn; psn=psn->psNext)
{
if (psn == psRemove)
{
/* Other calling code may have freed and zero'd the pointers */
if (psn->psRDesc)
{
OSFREEMEM(psn->psRDesc);
}
if (psn->psStream)
{
OSFREEMEM(psn->psStream);
}
*last = psn->psNext;
break;
}
last = &psn->psNext;
}
// Release the event list object owned by the stream node
if (psRemove->hDataEventObj)
{
eError = OSEventObjectDestroy(psRemove->hDataEventObj);
PVR_LOG_IF_ERROR(eError, "OSEventObjectDestroy");
psRemove->hDataEventObj = NULL;
}
// Release the memory of the stream node
OSFREEMEM(psRemove);
PVR_DPF_RETURN;
}
PVRSRV_ERROR
TLServerCloseStreamKM(PTL_STREAM_DESC psSD)
{
PVRSRV_ERROR eError = PVRSRV_OK;
PTL_GLOBAL_DATA psGD = TLGGD();
PTL_SNODE psNode = 0;
PVR_DPF_ENTERED;
PVR_ASSERT(psSD);
// Sanity check, quick exit if there are no streams
if (psGD->psHead == NULL)
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_HANDLE_NOT_FOUND);
}
// Check stream still valid
psNode = TLFindStreamNodeByDesc(psSD);
if ((psNode == NULL) || (psNode != psSD->psNode))
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_HANDLE_NOT_FOUND);
}
// Close and free the event handle resource used by this descriptor
eError = OSEventObjectClose(psSD->hDataEvent);
if (eError != PVRSRV_OK)
{
// Log error but continue as it seems best
PVR_DPF((PVR_DBG_ERROR, "OSEventObjectClose() failed error %d", eError));
eError = PVRSRV_ERROR_UNABLE_TO_DESTROY_EVENT;
}
// Remove descriptor from stream object/list
TLRemoveDescAndTryFreeStreamNode(psNode);
// Free the stream descriptor object
OSFREEMEM(psSD);
// Assert the counter is sane after input data validated.
PVR_ASSERT(TLGGD()->uiClientCnt > 0);
TLGGD()->uiClientCnt--;
PVR_DPF_RETURN_RC(eError);
}
/*******************************************************************************
* TL Server public API implementation.
******************************************************************************/
PVRSRV_ERROR
TLStreamCreate(IMG_HANDLE *phStream,
IMG_CHAR *szStreamName,
IMG_UINT32 ui32Size,
IMG_UINT32 ui32StreamFlags,
TL_STREAM_SOURCECB pfProducerCB,
IMG_PVOID pvProducerUD)
{
PTL_STREAM psTmp;
PVRSRV_ERROR eError;
IMG_HANDLE hEventList;
PTL_SNODE psn = 0;
IMG_CHAR pszBufferLabel[PRVSRVTL_MAX_STREAM_NAME_SIZE+20];
DEVMEM_FLAGS_T uiMemFlags = PVRSRV_MEMALLOCFLAG_CPU_READABLE |
PVRSRV_MEMALLOCFLAG_CPU_WRITEABLE |
PVRSRV_MEMALLOCFLAG_GPU_READABLE |
PVRSRV_MEMALLOCFLAG_GPU_WRITEABLE |
PVRSRV_MEMALLOCFLAG_UNCACHED | /* GPU & CPU */
PVRSRV_MEMALLOCFLAG_ZERO_ON_ALLOC |
PVRSRV_MEMALLOCFLAG_CPU_WRITE_COMBINE;
PVR_DPF_ENTERED;
/* Sanity checks: */
/* non NULL handler required */
if ( NULL == phStream )
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_INVALID_PARAMS);
}
if (OSStringLength(szStreamName) >= PRVSRVTL_MAX_STREAM_NAME_SIZE)
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_INVALID_PARAMS);
}
/* Check if there already exists a stream with this name. */
psn = TLFindStreamNodeByName( szStreamName );
if ( IMG_NULL != psn )
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_ALREADY_EXISTS);
}
/* Allocate stream structure container (stream struct) for the new stream */
psTmp = OSAllocZMem(sizeof(TL_STREAM)) ;
if ( NULL == psTmp )
{
PVR_DPF_RETURN_RC(PVRSRV_ERROR_OUT_OF_MEMORY);
}
OSStringCopy(psTmp->szName, szStreamName);
if ( ui32StreamFlags & TL_FLAG_FORCE_FLUSH )
{
psTmp->bWaitForEmptyOnDestroy = IMG_TRUE;
}
psTmp->bNoSignalOnCommit = (ui32StreamFlags&TL_FLAG_NO_SIGNAL_ON_COMMIT) ? IMG_TRUE : IMG_FALSE;
if ( ui32StreamFlags & TL_FLAG_DROP_DATA )
{
if ( ui32StreamFlags & TL_FLAG_BLOCKING_RESERVE )
{
eError = PVRSRV_ERROR_INVALID_PARAMS;
goto e0;
}
psTmp->bDrop = IMG_TRUE;
}
else if ( ui32StreamFlags & TL_FLAG_BLOCKING_RESERVE )
{ /* Additional synchronization object required for this kind of stream */
psTmp->bBlock = IMG_TRUE;
eError = OSEventObjectCreate(NULL, &psTmp->hProducerEventObj);
if (eError != PVRSRV_OK)
{
goto e0;
}
/* Create an event handle for this kind of stream */
eError = OSEventObjectOpen(psTmp->hProducerEventObj, &psTmp->hProducerEvent);
if (eError != PVRSRV_OK)
{
goto e1;
}
}
/* Remember producer supplied CB and data for later */
psTmp->pfProducerCallback = (IMG_VOID(*)(IMG_VOID))pfProducerCB;
psTmp->pvProducerUserData = pvProducerUD;
/* Round the requested bytes to a multiple of array elements' size, eg round 3 to 4 */
psTmp->ui32Size = PVRSRVTL_ALIGN(ui32Size);
psTmp->ui32Read = 0;
psTmp->ui32Write = 0;
psTmp->ui32Pending = NOTHING_PENDING;
OSSNPrintf(pszBufferLabel, sizeof(pszBufferLabel), "TLStreamBuf-%s", szStreamName);
/* Allocate memory for the circular buffer and export it to user space. */
eError = DevmemAllocateExportable( IMG_NULL,
(IMG_HANDLE) TLGetGlobalRgxDevice(),
(IMG_DEVMEM_SIZE_T)psTmp->ui32Size,
(IMG_DEVMEM_ALIGN_T) OSGetPageSize(),
uiMemFlags | PVRSRV_MEMALLOCFLAG_KERNEL_CPU_MAPPABLE,
pszBufferLabel,
&psTmp->psStreamMemDesc);
PVR_LOGG_IF_ERROR(eError, "DevmemAllocateExportable", e2);
eError = DevmemAcquireCpuVirtAddr( psTmp->psStreamMemDesc, (IMG_VOID**) &psTmp->pbyBuffer );
PVR_LOGG_IF_ERROR(eError, "DevmemAcquireCpuVirtAddr", e3);
eError = DevmemExport(psTmp->psStreamMemDesc, &(psTmp->sExportCookie));
PVR_LOGG_IF_ERROR(eError, "DevmemExport", e4);
/* Synchronization object to synchronize with user side data transfers. */
eError = OSEventObjectCreate(psTmp->szName, &hEventList);
if (eError != PVRSRV_OK)
{
goto e5;
}
/* Stream created, now reset the reference count to 1 */
psTmp->uiRefCount = 1;
//Thread Safety: Not yet implemented eError = OSLockCreate(&psTmp->hLock, LOCK_TYPE_PASSIVE);
//Thread Safety: Not yet implemented if (eError != PVRSRV_OK)
//Thread Safety: Not yet implemented {
//Thread Safety: Not yet implemented goto e6;
//Thread Safety: Not yet implemented }
/* Now remember the stream in the global TL structures */
psn = TLMakeSNode(hEventList, (TL_STREAM *)psTmp, 0);
if (psn == NULL)
{
eError=PVRSRV_ERROR_OUT_OF_MEMORY;
goto e7;
}
TLAddStreamNode(psn);
/* Best effort signal, client wait timeout will ultimately let it find the
* new stream if this fails, acceptable to avoid cleanup as it is tricky
* at this point */
(void) OSEventObjectSignal(TLGGD()->hTLEventObj);
/* Pass the newly created stream handle back to caller */
*phStream = (IMG_HANDLE)psTmp;
PVR_DPF_RETURN_OK;
e7:
//Thread Safety: Not yet implemented OSLockDestroy(psTmp->hLock);
//Thread Safety: Not yet implemented e6:
OSEventObjectDestroy(hEventList);
e5:
DevmemUnexport(psTmp->psStreamMemDesc, &(psTmp->sExportCookie));
e4:
DevmemReleaseCpuVirtAddr( psTmp->psStreamMemDesc );
e3:
DevmemFree(psTmp->psStreamMemDesc);
e2:
OSEventObjectClose(psTmp->hProducerEvent);
e1:
OSEventObjectDestroy(psTmp->hProducerEventObj);
e0:
OSFREEMEM(psTmp);
PVR_DPF_RETURN_RC(eError);
}
