static void myri_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
struct net_device *dev = (struct net_device *) dev_id;
struct myri_eth *mp = (struct myri_eth *) dev->priv;
unsigned long lregs = mp->lregs;
struct myri_channel *chan = &mp->shmem->channel;
u32 status;
status = sbus_readl(lregs + LANAI_ISTAT);
DIRQ(("myri_interrupt: status[%08x] ", status));
if (status & ISTAT_HOST) {
u32 softstate;
DIRQ(("IRQ_DISAB "));
myri_disable_irq(lregs, mp->cregs);
softstate = sbus_readl(&chan->state);
DIRQ(("state[%08x] ", softstate));
if (softstate != STATE_READY) {
DIRQ(("myri_not_so_happy "));
myri_is_not_so_happy(mp);
}
DIRQ(("\nmyri_rx: "));
myri_rx(mp, dev);
DIRQ(("\nistat=ISTAT_HOST "));
sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
DIRQ(("IRQ_ENAB "));
myri_enable_irq(lregs, mp->cregs);
}
DIRQ(("\n"));
}
static int myri_do_handshake(struct myri_eth *mp)
{
struct myri_shmem __iomem *shmem = mp->shmem;
void __iomem *cregs = mp->cregs;
struct myri_channel __iomem *chan = &shmem->channel;
int tick = 0;
DET(("myri_do_handshake: "));
if (sbus_readl(&chan->state) == STATE_READY) {
DET(("Already STATE_READY, failed.\n"));
return -1; /* We're hosed... */
}
myri_disable_irq(mp->lregs, cregs);
while (tick++ < 25) {
u32 softstate;
/* Wake it up. */
DET(("shakedown, CONTROL_WON, "));
sbus_writel(1, &shmem->shakedown);
sbus_writel(CONTROL_WON, cregs + MYRICTRL_CTRL);
softstate = sbus_readl(&chan->state);
DET(("chanstate[%08x] ", softstate));
if (softstate == STATE_READY) {
DET(("wakeup successful, "));
break;
}
if (softstate != STATE_WFN) {
DET(("not WFN setting that, "));
sbus_writel(STATE_WFN, &chan->state);
}
udelay(20);
}
myri_enable_irq(mp->lregs, cregs);
if (tick > 25) {
DET(("25 ticks we lose, failure.\n"));
return -1;
}
DET(("success\n"));
return 0;
}
static irqreturn_t myri_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *) dev_id;
struct myri_eth *mp = netdev_priv(dev);
void __iomem *lregs = mp->lregs;
struct myri_channel __iomem *chan = &mp->shmem->channel;
unsigned long flags;
u32 status;
int handled = 0;
spin_lock_irqsave(&mp->irq_lock, flags);
status = sbus_readl(lregs + LANAI_ISTAT);
DIRQ(("myri_interrupt: status[%08x] ", status));
if (status & ISTAT_HOST) {
u32 softstate;
handled = 1;
DIRQ(("IRQ_DISAB "));
myri_disable_irq(lregs, mp->cregs);
softstate = sbus_readl(&chan->state);
DIRQ(("state[%08x] ", softstate));
if (softstate != STATE_READY) {
DIRQ(("myri_not_so_happy "));
myri_is_not_so_happy(mp);
}
DIRQ(("\nmyri_rx: "));
myri_rx(mp, dev);
DIRQ(("\nistat=ISTAT_HOST "));
sbus_writel(ISTAT_HOST, lregs + LANAI_ISTAT);
DIRQ(("IRQ_ENAB "));
myri_enable_irq(lregs, mp->cregs);
}
DIRQ(("\n"));
spin_unlock_irqrestore(&mp->irq_lock, flags);
return IRQ_RETVAL(handled);
}