void vqueuePut(PVPCISTATE pState, PVQUEUE pQueue, PVQUEUEELEM pElem, uint32_t uLen, uint32_t uReserved)
{
unsigned int i, uOffset, cbReserved = uReserved;
Log2(("%s vqueuePut: %s desc_idx=%u acb=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pElem->uIndex, uLen));
for (i = uOffset = 0; i < pElem->nIn && uOffset < uLen - uReserved; i++)
{
uint32_t cbSegLen = RT_MIN(uLen - cbReserved - uOffset, pElem->aSegsIn[i].cb - cbReserved);
if (pElem->aSegsIn[i].pv)
{
Log2(("%s vqueuePut: %s used_idx=%u seg=%u addr=%p pv=%p cb=%u acb=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pQueue->uNextUsedIndex, i, pElem->aSegsIn[i].addr, pElem->aSegsIn[i].pv, pElem->aSegsIn[i].cb, cbSegLen));
PDMDevHlpPhysWrite(pState->CTX_SUFF(pDevIns), pElem->aSegsIn[i].addr + cbReserved,
pElem->aSegsIn[i].pv, cbSegLen);
cbReserved = 0;
}
uOffset += cbSegLen;
}
Assert((uReserved + uOffset) == uLen || pElem->nIn == 0);
Log2(("%s vqueuePut: %s used_idx=%u guest_used_idx=%u id=%u len=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), pQueue->uNextUsedIndex, vringReadUsedIndex(pState, &pQueue->VRing), pElem->uIndex, uLen));
vringWriteUsedElem(pState, &pQueue->VRing, pQueue->uNextUsedIndex++, pElem->uIndex, uLen);
}
void vqueueSync(PVPCISTATE pState, PVQUEUE pQueue)
{
Log2(("%s vqueueSync: %s old_used_idx=%u new_used_idx=%u\n", INSTANCE(pState),
QUEUENAME(pState, pQueue), vringReadUsedIndex(pState, &pQueue->VRing), pQueue->uNextUsedIndex));
vringWriteUsedIndex(pState, &pQueue->VRing, pQueue->uNextUsedIndex);
vqueueNotify(pState, pQueue);
}
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;
}
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;
}
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);
}
}