int irq_set_affinity_hint(unsigned int irq, const struct cpumask *m)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
if (!desc)
return -EINVAL;
static int __disable_irq_nosync(unsigned int irq)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
if (!desc)
return -EINVAL;
void enable_irq(unsigned int irq)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
if (!desc)
return;
struct irq_desc *desc = irq_to_desc(irq);
int ret = -ENXIO;
+ if (irq_desc_get_chip(desc)->flags & IRQCHIP_SKIP_SET_WAKE)
+ return 0;
+
if (desc->irq_data.chip->irq_set_wake)
ret = desc->irq_data.chip->irq_set_wake(&desc->irq_data, on);
int irq_set_irq_wake(unsigned int irq, unsigned int on)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
int ret = 0;
if (!desc)
int can_request_irq(unsigned int irq, unsigned long irqflags)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
int canrequest = 0;
if (!desc)
int retval;
struct irq_desc *desc = irq_to_desc(irq);
+ if (WARN_ON(irq_settings_is_per_cpu_devid(desc)))
+ return -EINVAL;
chip_bus_lock(desc);
retval = __setup_irq(irq, desc, act);
chip_bus_sync_unlock(desc);
}
EXPORT_SYMBOL_GPL(setup_irq);
- /*
+/*
* Internal function to unregister an irqaction - used to free
* regular and special interrupts that are part of the architecture.
*/
*/
void remove_irq(unsigned int irq, struct irqaction *act)
{
- __free_irq(irq, act->dev_id);
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (desc && !WARN_ON(irq_settings_is_per_cpu_devid(desc)))
+ __free_irq(irq, act->dev_id);
}
EXPORT_SYMBOL_GPL(remove_irq);
{
struct irq_desc *desc = irq_to_desc(irq);
- if (!desc)
+ if (!desc || WARN_ON(irq_settings_is_per_cpu_devid(desc)))
return;
#ifdef CONFIG_SMP
if (!desc)
return -EINVAL;
- if (!irq_settings_can_request(desc))
+ if (!irq_settings_can_request(desc) ||
+ WARN_ON(irq_settings_is_per_cpu_devid(desc)))
return -EINVAL;
if (!handler) {
return !ret ? IRQC_IS_HARDIRQ : ret;
}
EXPORT_SYMBOL_GPL(request_any_context_irq);
+
+void enable_percpu_irq(unsigned int irq, unsigned int type)
+{
+ unsigned int cpu = smp_processor_id();
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
+
+ if (!desc)
+ return;
+
+ type &= IRQ_TYPE_SENSE_MASK;
+ if (type != IRQ_TYPE_NONE) {
+ int ret;
+
+ ret = __irq_set_trigger(desc, irq, type);
+
+ if (ret) {
+ WARN(1, "failed to set type for IRQ%d\n", irq);
+ goto out;
+ }
+ }
+
+ irq_percpu_enable(desc, cpu);
+out:
+ irq_put_desc_unlock(desc, flags);
+}
+
+void disable_percpu_irq(unsigned int irq)
+{
+ unsigned int cpu = smp_processor_id();
+ unsigned long flags;
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, IRQ_GET_DESC_CHECK_PERCPU);
+
+ if (!desc)
+ return;
+
+ irq_percpu_disable(desc, cpu);
+ irq_put_desc_unlock(desc, flags);
+}
+
+/*
+ * Internal function to unregister a percpu irqaction.
+ */
+static struct irqaction *__free_percpu_irq(unsigned int irq, void __percpu *dev_id)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ struct irqaction *action;
+ unsigned long flags;
+
+ WARN(in_interrupt(), "Trying to free IRQ %d from IRQ context!\n", irq);
+
+ if (!desc)
+ return NULL;
+
+ raw_spin_lock_irqsave(&desc->lock, flags);
+
+ action = desc->action;
+ if (!action || action->percpu_dev_id != dev_id) {
+ WARN(1, "Trying to free already-free IRQ %d\n", irq);
+ goto bad;
+ }
+
+ if (!cpumask_empty(desc->percpu_enabled)) {
+ WARN(1, "percpu IRQ %d still enabled on CPU%d!\n",
+ irq, cpumask_first(desc->percpu_enabled));
+ goto bad;
+ }
+
+ /* Found it - now remove it from the list of entries: */
+ desc->action = NULL;
+
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+
+ unregister_handler_proc(irq, action);
+
+ module_put(desc->owner);
+ return action;
+
+bad:
+ raw_spin_unlock_irqrestore(&desc->lock, flags);
+ return NULL;
+}
+
+/**
+ * remove_percpu_irq - free a per-cpu interrupt
+ * @irq: Interrupt line to free
+ * @act: irqaction for the interrupt
+ *
+ * Used to remove interrupts statically setup by the early boot process.
+ */
+void remove_percpu_irq(unsigned int irq, struct irqaction *act)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (desc && irq_settings_is_per_cpu_devid(desc))
+ __free_percpu_irq(irq, act->percpu_dev_id);
+}
+
+/**
+ * free_percpu_irq - free an interrupt allocated with request_percpu_irq
+ * @irq: Interrupt line to free
+ * @dev_id: Device identity to free
+ *
+ * Remove a percpu interrupt handler. The handler is removed, but
+ * the interrupt line is not disabled. This must be done on each
+ * CPU before calling this function. The function does not return
+ * until any executing interrupts for this IRQ have completed.
+ *
+ * This function must not be called from interrupt context.
+ */
+void free_percpu_irq(unsigned int irq, void __percpu *dev_id)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ if (!desc || !irq_settings_is_per_cpu_devid(desc))
+ return;
+
+ chip_bus_lock(desc);
+ kfree(__free_percpu_irq(irq, dev_id));
+ chip_bus_sync_unlock(desc);
+}
+
+/**
+ * setup_percpu_irq - setup a per-cpu interrupt
+ * @irq: Interrupt line to setup
+ * @act: irqaction for the interrupt
+ *
+ * Used to statically setup per-cpu interrupts in the early boot process.
+ */
+int setup_percpu_irq(unsigned int irq, struct irqaction *act)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ int retval;
+
+ if (!desc || !irq_settings_is_per_cpu_devid(desc))
+ return -EINVAL;
+ chip_bus_lock(desc);
+ retval = __setup_irq(irq, desc, act);
+ chip_bus_sync_unlock(desc);
+
+ return retval;
+}
+
+/**
+ * request_percpu_irq - allocate a percpu interrupt line
+ * @irq: Interrupt line to allocate
+ * @handler: Function to be called when the IRQ occurs.
+ * @devname: An ascii name for the claiming device
+ * @dev_id: A percpu cookie passed back to the handler function
+ *
+ * This call allocates interrupt resources, but doesn't
+ * automatically enable the interrupt. It has to be done on each
+ * CPU using enable_percpu_irq().
+ *
+ * Dev_id must be globally unique. It is a per-cpu variable, and
+ * the handler gets called with the interrupted CPU's instance of
+ * that variable.
+ */
+int request_percpu_irq(unsigned int irq, irq_handler_t handler,
+ const char *devname, void __percpu *dev_id)
+{
+ struct irqaction *action;
+ struct irq_desc *desc;
+ int retval;
+
+ if (!dev_id)
+ return -EINVAL;
+
+ desc = irq_to_desc(irq);
+ if (!desc || !irq_settings_can_request(desc) ||
+ !irq_settings_is_per_cpu_devid(desc))
+ return -EINVAL;
+
+ action = kzalloc(sizeof(struct irqaction), GFP_KERNEL);
+ if (!action)
+ return -ENOMEM;
+
+ action->handler = handler;
+ action->flags = IRQF_PERCPU;
+ action->name = devname;
+ action->percpu_dev_id = dev_id;
+
+ chip_bus_lock(desc);
+ retval = __setup_irq(irq, desc, action);
+ chip_bus_sync_unlock(desc);
+
+ if (retval)
+ kfree(action);
+
+ return retval;
+}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff