void vqueueNotify(PVPCISTATE pState, PVQUEUE pQueue)
{
LogFlow(("%s vqueueNotify: %s availFlags=%x guestFeatures=%x vqueue is %sempty\n",
INSTANCE(pState), QUEUENAME(pState, pQueue),
vringReadAvailFlags(pState, &pQueue->VRing),
pState->uGuestFeatures, vqueueIsEmpty(pState, pQueue)?"":"not "));
if (!(vringReadAvailFlags(pState, &pQueue->VRing) & VRINGAVAIL_F_NO_INTERRUPT)
|| ((pState->uGuestFeatures & VPCI_F_NOTIFY_ON_EMPTY) && vqueueIsEmpty(pState, pQueue)))
{
int rc = vpciRaiseInterrupt(pState, VERR_INTERNAL_ERROR, VPCI_ISR_QUEUE);
if (RT_FAILURE(rc))
Log(("%s vqueueNotify: Failed to raise an interrupt (%Rrc).\n", INSTANCE(pState), rc));
}
else
{
STAM_COUNTER_INC(&pState->StatIntsSkipped);
}
}
bool vqueueSkip(PVPCISTATE pState, PVQUEUE pQueue)
{
if (vqueueIsEmpty(pState, pQueue))
return false;
Log2(("%s vqueueSkip: %s avail_idx=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pQueue->uNextAvailIndex));
pQueue->uNextAvailIndex++;
return true;
}
bool vqueueGet(PVPCISTATE pState, PVQUEUE pQueue, PVQUEUEELEM pElem, bool fRemove)
{
if (vqueueIsEmpty(pState, pQueue))
return false;
pElem->nIn = pElem->nOut = 0;
Log2(("%s vqueueGet: %s avail_idx=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pQueue->uNextAvailIndex));
VRINGDESC desc;
uint16_t idx = vringReadAvail(pState, &pQueue->VRing, pQueue->uNextAvailIndex);
if (fRemove)
pQueue->uNextAvailIndex++;
pElem->uIndex = idx;
do
{
VQUEUESEG *pSeg;
vringReadDesc(pState, &pQueue->VRing, idx, &desc);
if (desc.u16Flags & VRINGDESC_F_WRITE)
{
Log2(("%s vqueueGet: %s IN seg=%u desc_idx=%u addr=%p cb=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pElem->nIn, idx, desc.u64Addr, desc.uLen));
pSeg = &pElem->aSegsIn[pElem->nIn++];
}
else
{
Log2(("%s vqueueGet: %s OUT seg=%u desc_idx=%u addr=%p cb=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pElem->nOut, idx, desc.u64Addr, desc.uLen));
pSeg = &pElem->aSegsOut[pElem->nOut++];
}
pSeg->addr = desc.u64Addr;
pSeg->cb = desc.uLen;
pSeg->pv = NULL;
idx = desc.u16Next;
} while (desc.u16Flags & VRINGDESC_F_NEXT);
Log2(("%s vqueueGet: %s head_desc_idx=%u nIn=%u nOut=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pElem->uIndex, pElem->nIn, pElem->nOut));
return true;
}
