*/
#include <linux/irq.h>
+#include <linux/msi.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
struct irq_desc *desc;
unsigned long flags;
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
- WARN_ON(1);
+ desc = irq_to_desc(irq);
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
return;
}
/* Ensure we don't have left over values from a previous use of this irq */
- desc = irq_desc + irq;
spin_lock_irqsave(&desc->lock, flags);
desc->status = IRQ_DISABLED;
desc->chip = &no_irq_chip;
desc->handle_irq = handle_bad_irq;
desc->depth = 1;
+ desc->msi_desc = NULL;
desc->handler_data = NULL;
desc->chip_data = NULL;
desc->action = NULL;
desc->irq_count = 0;
desc->irqs_unhandled = 0;
#ifdef CONFIG_SMP
- desc->affinity = CPU_MASK_ALL;
+ cpumask_setall(&desc->affinity);
#endif
spin_unlock_irqrestore(&desc->lock, flags);
}
*/
void dynamic_irq_cleanup(unsigned int irq)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
- WARN_ON(1);
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to cleanup invalid IRQ%d\n", irq);
return;
}
- desc = irq_desc + irq;
spin_lock_irqsave(&desc->lock, flags);
if (desc->action) {
spin_unlock_irqrestore(&desc->lock, flags);
- printk(KERN_ERR "Destroying IRQ%d without calling free_irq\n",
+ WARN(1, KERN_ERR "Destroying IRQ%d without calling free_irq\n",
irq);
- WARN_ON(1);
return;
}
+ desc->msi_desc = NULL;
+ desc->handler_data = NULL;
+ desc->chip_data = NULL;
desc->handle_irq = handle_bad_irq;
desc->chip = &no_irq_chip;
+ desc->name = NULL;
spin_unlock_irqrestore(&desc->lock, flags);
}
*/
int set_irq_chip(unsigned int irq, struct irq_chip *chip)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS) {
- printk(KERN_ERR "Trying to install chip for IRQ%d\n", irq);
- WARN_ON(1);
+ if (!desc) {
+ WARN(1, KERN_ERR "Trying to install chip for IRQ%d\n", irq);
return -EINVAL;
}
if (!chip)
chip = &no_irq_chip;
- desc = irq_desc + irq;
spin_lock_irqsave(&desc->lock, flags);
irq_chip_set_defaults(chip);
desc->chip = chip;
EXPORT_SYMBOL(set_irq_chip);
/**
- * set_irq_type - set the irq type for an irq
+ * set_irq_type - set the irq trigger type for an irq
* @irq: irq number
- * @type: interrupt type - see include/linux/interrupt.h
+ * @type: IRQ_TYPE_{LEVEL,EDGE}_* value - see include/linux/irq.h
*/
int set_irq_type(unsigned int irq, unsigned int type)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
int ret = -ENXIO;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR "Trying to set irq type for IRQ%d\n", irq);
return -ENODEV;
}
- desc = irq_desc + irq;
- if (desc->chip->set_type) {
- spin_lock_irqsave(&desc->lock, flags);
- ret = desc->chip->set_type(irq, type);
- spin_unlock_irqrestore(&desc->lock, flags);
- }
+ if (type == IRQ_TYPE_NONE)
+ return 0;
+
+ spin_lock_irqsave(&desc->lock, flags);
+ ret = __irq_set_trigger(desc, irq, type);
+ spin_unlock_irqrestore(&desc->lock, flags);
return ret;
}
EXPORT_SYMBOL(set_irq_type);
*/
int set_irq_data(unsigned int irq, void *data)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR
"Trying to install controller data for IRQ%d\n", irq);
return -EINVAL;
}
- desc = irq_desc + irq;
spin_lock_irqsave(&desc->lock, flags);
desc->handler_data = data;
spin_unlock_irqrestore(&desc->lock, flags);
EXPORT_SYMBOL(set_irq_data);
/**
+ * set_irq_data - set irq type data for an irq
+ * @irq: Interrupt number
+ * @entry: Pointer to MSI descriptor data
+ *
+ * Set the hardware irq controller data for an irq
+ */
+int set_irq_msi(unsigned int irq, struct msi_desc *entry)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR
+ "Trying to install msi data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+
+ spin_lock_irqsave(&desc->lock, flags);
+ desc->msi_desc = entry;
+ if (entry)
+ entry->irq = irq;
+ spin_unlock_irqrestore(&desc->lock, flags);
+ return 0;
+}
+
+/**
* set_irq_chip_data - set irq chip data for an irq
* @irq: Interrupt number
* @data: Pointer to chip specific data
*/
int set_irq_chip_data(unsigned int irq, void *data)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS || !desc->chip) {
+ if (!desc) {
+ printk(KERN_ERR
+ "Trying to install chip data for IRQ%d\n", irq);
+ return -EINVAL;
+ }
+
+ if (!desc->chip) {
printk(KERN_ERR "BUG: bad set_irq_chip_data(IRQ#%d)\n", irq);
return -EINVAL;
}
*/
static void default_enable(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
+ struct irq_desc *desc = irq_to_desc(irq);
desc->chip->unmask(irq);
desc->status &= ~IRQ_MASKED;
*/
static void default_disable(unsigned int irq)
{
- struct irq_desc *desc = irq_desc + irq;
-
- if (!(desc->status & IRQ_DELAYED_DISABLE))
- desc->chip->mask(irq);
}
/*
*/
static unsigned int default_startup(unsigned int irq)
{
- irq_desc[irq].chip->enable(irq);
+ struct irq_desc *desc = irq_to_desc(irq);
+ desc->chip->enable(irq);
return 0;
}
/*
+ * default shutdown function
+ */
+static void default_shutdown(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ desc->chip->mask(irq);
+ desc->status |= IRQ_MASKED;
+}
+
+/*
* Fixup enable/disable function pointers
*/
void irq_chip_set_defaults(struct irq_chip *chip)
chip->disable = default_disable;
if (!chip->startup)
chip->startup = default_startup;
+ /*
+ * We use chip->disable, when the user provided its own. When
+ * we have default_disable set for chip->disable, then we need
+ * to use default_shutdown, otherwise the irq line is not
+ * disabled on free_irq():
+ */
if (!chip->shutdown)
- chip->shutdown = chip->disable;
+ chip->shutdown = chip->disable != default_disable ?
+ chip->disable : default_shutdown;
if (!chip->name)
chip->name = chip->typename;
if (!chip->end)
* Note: The caller is expected to handle the ack, clear, mask and
* unmask issues if necessary.
*/
-void fastcall
+void
handle_simple_irq(unsigned int irq, struct irq_desc *desc)
{
struct irqaction *action;
irqreturn_t action_ret;
- const unsigned int cpu = smp_processor_id();
spin_lock(&desc->lock);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED)))
* it after the associated handler has acknowledged the device, so the
* interrupt line is back to inactive.
*/
-void fastcall
+void
handle_level_irq(unsigned int irq, struct irq_desc *desc)
{
- unsigned int cpu = smp_processor_id();
struct irqaction *action;
irqreturn_t action_ret;
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/*
* If its disabled or no action available
* keep it masked and get out of here
*/
action = desc->action;
- if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
- desc->status |= IRQ_PENDING;
+ if (unlikely(!action || (desc->status & IRQ_DISABLED)))
goto out_unlock;
- }
desc->status |= IRQ_INPROGRESS;
- desc->status &= ~IRQ_PENDING;
spin_unlock(&desc->lock);
action_ret = handle_IRQ_event(irq, action);
* for modern forms of interrupt handlers, which handle the flow
* details in hardware, transparently.
*/
-void fastcall
+void
handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
{
- unsigned int cpu = smp_processor_id();
struct irqaction *action;
irqreturn_t action_ret;
goto out;
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/*
* If its disabled or no action available
- * keep it masked and get out of here
+ * then mask it and get out of here:
*/
action = desc->action;
if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
desc->status |= IRQ_PENDING;
+ if (desc->chip->mask)
+ desc->chip->mask(irq);
goto out;
}
* the handler was running. If all pending interrupts are handled, the
* loop is left.
*/
-void fastcall
+void
handle_edge_irq(unsigned int irq, struct irq_desc *desc)
{
- const unsigned int cpu = smp_processor_id();
-
spin_lock(&desc->lock);
desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
mask_ack_irq(desc, irq);
goto out_unlock;
}
-
- kstat_cpu(cpu).irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
desc->chip->ack(irq);
spin_unlock(&desc->lock);
}
-#ifdef CONFIG_SMP
/**
* handle_percpu_IRQ - Per CPU local irq handler
* @irq: the interrupt number
*
* Per CPU interrupts on SMP machines without locking requirements
*/
-void fastcall
+void
handle_percpu_irq(unsigned int irq, struct irq_desc *desc)
{
irqreturn_t action_ret;
- kstat_this_cpu.irqs[irq]++;
+ kstat_incr_irqs_this_cpu(irq, desc);
if (desc->chip->ack)
desc->chip->ack(irq);
desc->chip->eoi(irq);
}
-#endif /* CONFIG_SMP */
-
void
__set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name)
{
- struct irq_desc *desc;
+ struct irq_desc *desc = irq_to_desc(irq);
unsigned long flags;
- if (irq >= NR_IRQS) {
+ if (!desc) {
printk(KERN_ERR
"Trying to install type control for IRQ%d\n", irq);
return;
}
- desc = irq_desc + irq;
-
if (!handle)
handle = handle_bad_irq;
else if (desc->chip == &no_irq_chip) {
/* Uninstall? */
if (handle == handle_bad_irq) {
- if (desc->chip != &no_irq_chip) {
- desc->chip->mask(irq);
- desc->chip->ack(irq);
- }
+ if (desc->chip != &no_irq_chip)
+ mask_ack_irq(desc, irq);
desc->status |= IRQ_DISABLED;
desc->depth = 1;
}
desc->status &= ~IRQ_DISABLED;
desc->status |= IRQ_NOREQUEST | IRQ_NOPROBE;
desc->depth = 0;
- desc->chip->unmask(irq);
+ desc->chip->startup(irq);
}
spin_unlock_irqrestore(&desc->lock, flags);
}
set_irq_chip(irq, chip);
__set_irq_handler(irq, handle, 0, name);
}
+
+void __init set_irq_noprobe(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
+ return;
+ }
+
+ spin_lock_irqsave(&desc->lock, flags);
+ desc->status |= IRQ_NOPROBE;
+ spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+void __init set_irq_probe(unsigned int irq)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ unsigned long flags;
+
+ if (!desc) {
+ printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
+ return;
+ }
+
+ spin_lock_irqsave(&desc->lock, flags);
+ desc->status &= ~IRQ_NOPROBE;
+ spin_unlock_irqrestore(&desc->lock, flags);
+}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff