/*
* linux/kernel/irq/manage.c
*
- * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
+ * Copyright (C) 1992, 1998-2006 Linus Torvalds, Ingo Molnar
+ * Copyright (C) 2005-2006 Thomas Gleixner
*
* This file contains driver APIs to the irq subsystem.
*/
#ifdef CONFIG_SMP
-cpumask_t irq_affinity[NR_IRQS] = { [0 ... NR_IRQS-1] = CPU_MASK_ALL };
-
-#if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
-cpumask_t __cacheline_aligned pending_irq_cpumask[NR_IRQS];
-#endif
-
/**
* synchronize_irq - wait for pending IRQ handlers (on other CPUs)
* @irq: interrupt number to wait for
while (desc->status & IRQ_INPROGRESS)
cpu_relax();
}
-
EXPORT_SYMBOL(synchronize_irq);
#endif
*/
void disable_irq_nosync(unsigned int irq)
{
- irq_desc_t *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_desc + irq;
unsigned long flags;
if (irq >= NR_IRQS)
spin_lock_irqsave(&desc->lock, flags);
if (!desc->depth++) {
desc->status |= IRQ_DISABLED;
- desc->handler->disable(irq);
+ desc->chip->disable(irq);
}
spin_unlock_irqrestore(&desc->lock, flags);
}
-
EXPORT_SYMBOL(disable_irq_nosync);
/**
*/
void disable_irq(unsigned int irq)
{
- irq_desc_t *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_desc + irq;
if (irq >= NR_IRQS)
return;
if (desc->action)
synchronize_irq(irq);
}
-
EXPORT_SYMBOL(disable_irq);
/**
*/
void enable_irq(unsigned int irq)
{
- irq_desc_t *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_desc + irq;
unsigned long flags;
if (irq >= NR_IRQS)
spin_lock_irqsave(&desc->lock, flags);
switch (desc->depth) {
case 0:
+ printk(KERN_WARNING "Unablanced enable_irq(%d)\n", irq);
WARN_ON(1);
break;
case 1: {
unsigned int status = desc->status & ~IRQ_DISABLED;
- desc->status = status;
- if ((status & (IRQ_PENDING | IRQ_REPLAY)) == IRQ_PENDING) {
- desc->status = status | IRQ_REPLAY;
- hw_resend_irq(desc->handler,irq);
- }
- desc->handler->enable(irq);
+ /* Prevent probing on this irq: */
+ desc->status = status | IRQ_NOPROBE;
+ check_irq_resend(desc, irq);
/* fall-through */
}
default:
}
spin_unlock_irqrestore(&desc->lock, flags);
}
-
EXPORT_SYMBOL(enable_irq);
/*
{
struct irqaction *action;
- if (irq >= NR_IRQS)
+ if (irq >= NR_IRQS || irq_desc[irq].status & IRQ_NOREQUEST)
return 0;
action = irq_desc[irq].action;
return !action;
}
+void compat_irq_chip_set_default_handler(struct irq_desc *desc)
+{
+ /*
+ * If the architecture still has not overriden
+ * the flow handler then zap the default. This
+ * should catch incorrect flow-type setting.
+ */
+ if (desc->handle_irq == &handle_bad_irq)
+ desc->handle_irq = NULL;
+}
+
/*
* Internal function to register an irqaction - typically used to
* allocate special interrupts that are part of the architecture.
*/
-int setup_irq(unsigned int irq, struct irqaction * new)
+int setup_irq(unsigned int irq, struct irqaction *new)
{
struct irq_desc *desc = irq_desc + irq;
struct irqaction *old, **p;
if (irq >= NR_IRQS)
return -EINVAL;
- if (desc->handler == &no_irq_type)
+ if (desc->chip == &no_irq_type)
return -ENOSYS;
/*
* Some drivers like serial.c use request_irq() heavily,
/*
* The following block of code has to be executed atomically
*/
- spin_lock_irqsave(&desc->lock,flags);
+ spin_lock_irqsave(&desc->lock, flags);
p = &desc->action;
- if ((old = *p) != NULL) {
+ old = *p;
+ if (old) {
/* Can't share interrupts unless both agree to */
if (!(old->flags & new->flags & SA_SHIRQ))
goto mismatch;
-#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
+#if defined(CONFIG_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
/* All handlers must agree on per-cpuness */
if ((old->flags & IRQ_PER_CPU) != (new->flags & IRQ_PER_CPU))
goto mismatch;
}
*p = new;
-#if defined(ARCH_HAS_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
+#if defined(CONFIG_IRQ_PER_CPU) && defined(SA_PERCPU_IRQ)
if (new->flags & SA_PERCPU_IRQ)
desc->status |= IRQ_PER_CPU;
#endif
if (!shared) {
- desc->depth = 0;
- desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT |
- IRQ_WAITING | IRQ_INPROGRESS);
- if (desc->handler->startup)
- desc->handler->startup(irq);
- else
- desc->handler->enable(irq);
+ irq_chip_set_defaults(desc->chip);
+ compat_irq_chip_set_default_handler(desc);
+
+ desc->status &= ~(IRQ_AUTODETECT | IRQ_WAITING |
+ IRQ_INPROGRESS);
+
+ if (!(desc->status & IRQ_NOAUTOEN)) {
+ desc->depth = 0;
+ desc->status &= ~IRQ_DISABLED;
+ if (desc->chip->startup)
+ desc->chip->startup(irq);
+ else
+ desc->chip->enable(irq);
+ }
}
- spin_unlock_irqrestore(&desc->lock,flags);
+ spin_unlock_irqrestore(&desc->lock, flags);
new->irq = irq;
register_irq_proc(irq);
mismatch:
spin_unlock_irqrestore(&desc->lock, flags);
- printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
- dump_stack();
+ if (!(new->flags & SA_PROBEIRQ)) {
+ printk(KERN_ERR "%s: irq handler mismatch\n", __FUNCTION__);
+ dump_stack();
+ }
return -EBUSY;
}
return;
desc = irq_desc + irq;
- spin_lock_irqsave(&desc->lock,flags);
+ spin_lock_irqsave(&desc->lock, flags);
p = &desc->action;
for (;;) {
- struct irqaction * action = *p;
+ struct irqaction *action = *p;
if (action) {
struct irqaction **pp = p;
/* Currently used only by UML, might disappear one day.*/
#ifdef CONFIG_IRQ_RELEASE_METHOD
- if (desc->handler->release)
- desc->handler->release(irq, dev_id);
+ if (desc->chip->release)
+ desc->chip->release(irq, dev_id);
#endif
if (!desc->action) {
desc->status |= IRQ_DISABLED;
- if (desc->handler->shutdown)
- desc->handler->shutdown(irq);
+ if (desc->chip->shutdown)
+ desc->chip->shutdown(irq);
else
- desc->handler->disable(irq);
+ desc->chip->disable(irq);
}
- spin_unlock_irqrestore(&desc->lock,flags);
+ spin_unlock_irqrestore(&desc->lock, flags);
unregister_handler_proc(irq, action);
/* Make sure it's not being used on another CPU */
kfree(action);
return;
}
- printk(KERN_ERR "Trying to free free IRQ%d\n",irq);
- spin_unlock_irqrestore(&desc->lock,flags);
+ printk(KERN_ERR "Trying to free free IRQ%d\n", irq);
+ spin_unlock_irqrestore(&desc->lock, flags);
return;
}
}
-
EXPORT_SYMBOL(free_irq);
/**
*/
int request_irq(unsigned int irq,
irqreturn_t (*handler)(int, void *, struct pt_regs *),
- unsigned long irqflags, const char * devname, void *dev_id)
+ unsigned long irqflags, const char *devname, void *dev_id)
{
- struct irqaction * action;
+ struct irqaction *action;
int retval;
/*
return -EINVAL;
if (irq >= NR_IRQS)
return -EINVAL;
+ if (irq_desc[irq].status & IRQ_NOREQUEST)
+ return -EINVAL;
if (!handler)
return -EINVAL;
return retval;
}
-
EXPORT_SYMBOL(request_irq);
projects / linux-2.6-omap-h63xx.git / blobdiff