void *
dma_getnextrxp(dma_info_t *di, bool forceall)
{
uint i;
void *rxp;
/* if forcing, dma engine must be disabled */
ASSERT(!forceall || !dma_rxenabled(di));
i = di->rxin;
/* return if no packets posted */
if (i == di->rxout)
return (NULL);
/* ignore curr if forceall */
if (!forceall && (i == B2I(R_REG(&di->regs->rcvstatus) & RS_CD_MASK)))
return (NULL);
/* get the packet pointer that corresponds to the rx descriptor */
rxp = di->rxp[i];
ASSERT(rxp);
di->rxp[i] = NULL;
/* clear this packet from the descriptor ring */
DMA_UNMAP(di->dev, (BUS_SWAP32(R_SM(&di->rxd[i].addr)) - di->dataoffset),
di->rxbufsize, DMA_RX, rxp);
W_SM(&di->rxd[i].addr, 0);
di->rxin = NEXTRXD(i);
return (rxp);
}
/*
* Reclaim next completed txd (txds if using chained buffers) and
* return associated packet.
* If 'force' is true, reclaim txd(s) and return associated packet
* regardless of the value of the hardware "curr" pointer.
*/
void*
dma_getnexttxp(dma_info_t *di, bool forceall)
{
uint start, end, i;
void *txp;
DMA_TRACE(("%s: dma_getnexttxp %s\n", di->name, forceall ? "all" : ""));
txp = NULL;
/* if forcing, dma engine must be disabled */
ASSERT(!forceall || !dma_txenabled(di));
start = di->txin;
if (forceall)
end = di->txout;
else
end = B2I(R_REG(&di->regs->xmtstatus) & XS_CD_MASK);
/* PR4738 - xmt disable/re-enable does not clear CURR */
if ((start == 0) && (end > di->txout))
goto bogus;
for (i = start; i != end && !txp; i = NEXTTXD(i)) {
DMA_UNMAP(di->dev, (BUS_SWAP32(R_SM(&di->txd[i].addr)) - di->dataoffset),
(BUS_SWAP32(R_SM(&di->txd[i].ctrl)) & CTRL_BC_MASK), DMA_TX, di->txp[i]);
W_SM(&di->txd[i].addr, 0);
txp = di->txp[i];
di->txp[i] = NULL;
}
di->txin = i;
/* tx flow control */
di->txavail = di->ntxd - NTXDACTIVE(di->txin, di->txout) - 1;
return (txp);
bogus:
/*
DMA_ERROR(("dma_getnexttxp: bogus curr: start %d end %d txout %d force %d\n",
start, end, di->txout, forceall));
*/
return (NULL);
}
PyObject* py_mapper_message(struct message* s) {
return Py_BuildValue("(s(iii)l)", s->descr, B2I(s->location_ok), B2I(s->city_ok), B2I(s->visited), (long)s->tile);
}
