/* The interrupt handler.
*/
void
oeth_interrupt(void)
{
volatile oeth_regs *regs;
regs = (oeth_regs *)(OETH_REG_BASE);
uint int_events;
int serviced;
serviced = 0;
/* Get the interrupt events that caused us to be here.
*/
int_events = regs->int_src;
regs->int_src = int_events;
/* Handle receive event in its own function.
*/
if (int_events & (OETH_INT_RXF | OETH_INT_RXE)) {
serviced |= 0x1;
oeth_rx();
}
/* Handle transmit event in its own function.
*/
if (int_events & (OETH_INT_TXB | OETH_INT_TXE)) {
serviced |= 0x2;
oeth_tx();
serviced |= 0x2;
}
/* Check for receive busy, i.e. packets coming but no place to
* put them.
*/
if (int_events & OETH_INT_BUSY) {
serviced |= 0x4;
if (!(int_events & (OETH_INT_RXF | OETH_INT_RXE)))
oeth_rx();
}
return;
}
/* The interrupt handler.
*/
static irqreturn_t
oeth_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = dev_id;
volatile struct oeth_private *cep;
uint int_events;
int serviced;
serviced = 0;
#ifdef DEBUG
printk(".");
printk("\n=tx_ | %x | %x | %x | %x | %x | %x | %x | %x\n",
((oeth_bd *)(OETH_BD_BASE))->len_status,
((oeth_bd *)(OETH_BD_BASE+8))->len_status,
((oeth_bd *)(OETH_BD_BASE+16))->len_status,
((oeth_bd *)(OETH_BD_BASE+24))->len_status,
((oeth_bd *)(OETH_BD_BASE+32))->len_status,
((oeth_bd *)(OETH_BD_BASE+40))->len_status,
((oeth_bd *)(OETH_BD_BASE+48))->len_status,
((oeth_bd *)(OETH_BD_BASE+56))->len_status);
printk("=rx_ | %x | %x | %x | %x | %x | %x | %x | %x\n",
((oeth_bd *)(OETH_BD_BASE+64))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+8))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+16))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+24))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+32))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+40))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+48))->len_status,
((oeth_bd *)(OETH_BD_BASE+64+56))->len_status);
#endif
cep = (struct oeth_private *)dev->priv;
/* Get the interrupt events that caused us to be here.
*/
int_events = cep->regs->int_src;
cep->regs->int_src = int_events;
/* Handle receive event in its own function.
*/
if (int_events & (OETH_INT_RXF | OETH_INT_RXE)) {
D(serviced |= 0x1);
oeth_rx(dev_id);
}
/* Handle transmit event in its own function.
*/
if (int_events & (OETH_INT_TXB | OETH_INT_TXE)) {
D(serviced |= 0x2);
oeth_tx(dev_id);
if (netif_queue_stopped(dev)) {
D(printk("n"));
netif_wake_queue(dev);
}
}
/* Check for receive busy, i.e. packets coming but no place to
* put them.
*/
if (int_events & OETH_INT_BUSY) {
D(serviced |= 0x4);
D(printk("b"));
if (!(int_events & (OETH_INT_RXF | OETH_INT_RXE)))
oeth_rx(dev_id);
}
#if 0
if (serviced == 0) {
void die(const char * str, struct pt_regs * regs, long err);
int show_stack(unsigned long *esp);
printk("!");
// printk("unserviced irq\n");
// show_stack(NULL);
// die("unserviced irq\n", regs, 801);
}
#endif
#ifdef DEBUG
if (serviced == 0)
printk("\nnot serviced: events 0x%x, irq %d, dev %p\n",
int_events, irq, dev_id);
else
printk(" | serviced 0x%x, events 0x%x, irq %d, dev %p\n",
serviced, int_events, irq, dev_id);
#endif
return IRQ_HANDLED;
}
