static int greth_open(struct net_device *dev)
{
struct greth_private *greth = netdev_priv(dev);
int err;
err = greth_init_rings(greth);
if (err) {
if (netif_msg_ifup(greth))
dev_err(&dev->dev, "Could not allocate memory for DMA rings\n");
return err;
}
err = request_irq(greth->irq, greth_interrupt, 0, "eth", (void *) dev);
if (err) {
if (netif_msg_ifup(greth))
dev_err(&dev->dev, "Could not allocate interrupt %d\n", dev->irq);
greth_clean_rings(greth);
return err;
}
if (netif_msg_ifup(greth))
dev_dbg(&dev->dev, " starting queue\n");
netif_start_queue(dev);
GRETH_REGSAVE(greth->regs->status, 0xFF);
napi_enable(&greth->napi);
greth_enable_irqs(greth);
greth_enable_tx(greth);
greth_enable_rx(greth);
return 0;
}
static int greth_poll(struct napi_struct *napi, int budget)
{
struct greth_private *greth;
int work_done = 0;
greth = container_of(napi, struct greth_private, napi);
if (greth->gbit_mac) {
greth_clean_tx_gbit(greth->netdev);
} else {
greth_clean_tx(greth->netdev);
}
restart_poll:
if (greth->gbit_mac) {
work_done += greth_rx_gbit(greth->netdev, budget - work_done);
} else {
work_done += greth_rx(greth->netdev, budget - work_done);
}
if (work_done < budget) {
napi_complete(napi);
if (greth_pending_packets(greth)) {
napi_reschedule(napi);
goto restart_poll;
}
}
greth_enable_irqs(greth);
return work_done;
}
