NDIS_STATUS
Hvl11Initialize(
_In_ PHVL pHvl,
_In_ PHW Hw
)
{
ULONG i = 0;
MpTrace(COMP_HVL, DBG_NORMAL, ("Hvl11Initialize called\n"));
pHvl->Hw = Hw;
pHvl->ulNumThreadsPending = 0;
pHvl->pActiveContext = NULL;
pHvl->pHelperPortCtx = NULL;
pHvl->pExAccessVNic = NULL;
pHvl->pExAccessDelegatedVNic = NULL;
pHvl->ulStatusFlags = 0;
pHvl->ulNumPortCtxs = 0;
pHvl->fNotificationsWorkItemRunning = 0;
HvlInitPreAllocatedOp(pHvl);
// initialize all the pre-allocated contexts
for (i = 0; i < HVL_NUM_CONTEXTS; i++)
{
HvlinitContext(&(pHvl->HvlContexts[i]), FALSE);
}
KeInitializeEvent(&pHvl->CtxSEvent, SynchronizationEvent , FALSE); // auto-reset event
KeInitializeEvent(&pHvl->TerminatingEvent, NotificationEvent, FALSE); // manual reset event
KeInitializeEvent(&pHvl->ExAccessEvent, SynchronizationEvent, FALSE); // auto-reset event
HvlClearCachedNotification(pHvl);
if (pHvl->fVirtualizationEnabled)
{
NdisQueueIoWorkItem(
pHvl->CtxSWorkItemHandle,
HvlCtxSWorkItem,
pHvl
);
// increment the variable that keeps track of pending threads
pHvl->ulNumThreadsPending++;
// run the context switch logic for the first time
KeSetEvent(&pHvl->CtxSEvent, 0, FALSE);
}
return NDIS_STATUS_SUCCESS;
}
/*
This function assigns the VNIC to an unused HVL context
*/
VOID
HvlAssignVNicToContext(
_In_ PHVL pHvl,
_In_ PVNIC pVNic,
_Out_ PHVL_CONTEXT *ppCtx
)
{
PHVL_CONTEXT pCtx = NULL;
BOOLEAN fFoundCtx = FALSE;
ULONG ulCtxIndex = 0;
ASSERT(ppCtx);
ASSERT(HvlIsLocked(pHvl));
do
{
*ppCtx = NULL;
for (ulCtxIndex = 0; ulCtxIndex < HVL_NUM_CONTEXTS; ulCtxIndex++)
{
pCtx = &(pHvl->HvlContexts[ulCtxIndex]);
if (pCtx->fCtxInUse == FALSE)
{
fFoundCtx = TRUE;
break;
}
}
ASSERT(fFoundCtx && ulCtxIndex < HVL_NUM_CONTEXTS);
// setup this context
HvlinitContext(pCtx, TRUE);
// Add the VNIC to the VNIC list in the context
HvlAddVNicToCtx(pVNic, pCtx);
// set the context signature from the VNIC
HvlCtxUpdateSignature(pCtx);
pHvl->ulNumPortCtxs++;
MpTrace(COMP_HVL, DBG_NORMAL, ("Associated VNIC (%d) to context (%p)", VNIC_PORT_NO, pCtx));
*ppCtx = pCtx;
} while (FALSE);
return;
}
/*
Removes all the references to this context
*/
VOID
HvlReturnContext(
_In_ PHVL pHvl,
_In_ PHVL_CONTEXT pCtx
)
{
ASSERT(HvlIsLocked(pHvl));
ASSERT(pCtx->fCtxInUse);
ASSERT(IsListEmpty(&pCtx->VNicList) && pCtx->ulNumVNics == 0);
// remove all the references to this context
HvlRemoveCtxReferences(pHvl, pCtx);
// set the context as not being used
HvlinitContext(pCtx, FALSE);
pHvl->ulNumPortCtxs--;
}
