static irqreturn_t greth_interrupt(int irq, void *dev_id)
{
struct net_device *dev = dev_id;
struct greth_private *greth;
u32 status;
irqreturn_t retval = IRQ_NONE;
greth = netdev_priv(dev);
spin_lock(&greth->devlock);
/* Get the interrupt events that caused us to be here. */
status = GRETH_REGLOAD(greth->regs->status);
/* Handle rx and tx interrupts through poll */
if (status & (GRETH_INT_RX | GRETH_INT_TX)) {
/* Clear interrupt status */
GRETH_REGORIN(greth->regs->status,
status & (GRETH_INT_RX | GRETH_INT_TX));
retval = IRQ_HANDLED;
/* Disable interrupts and schedule poll() */
greth_disable_irqs(greth);
napi_schedule(&greth->napi);
}
mmiowb();
spin_unlock(&greth->devlock);
return retval;
}
static inline void greth_enable_irqs(struct greth_private *greth)
{
GRETH_REGORIN(greth->regs->control, GRETH_RXI | GRETH_TXI);
}
static inline void greth_enable_rx(struct greth_private *greth)
{
wmb();
GRETH_REGORIN(greth->regs->control, GRETH_RXEN);
}
static inline void greth_enable_tx_and_irq(struct greth_private *greth)
{
wmb(); /* BDs must been written to memory before enabling TX */
GRETH_REGORIN(greth->regs->control, GRETH_TXEN | GRETH_TXI);
}
