#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
+#include <trace/events/irq.h>
+
#include "internals.h"
/**
int irq_set_chip(unsigned int irq, struct irq_chip *chip)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
if (!desc)
return -EINVAL;
if (!chip)
chip = &no_irq_chip;
- irq_chip_set_defaults(chip);
desc->irq_data.chip = chip;
irq_put_desc_unlock(desc, flags);
/*
int irq_set_irq_type(unsigned int irq, unsigned int type)
{
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)
return -EINVAL;
type &= IRQ_TYPE_SENSE_MASK;
- if (type != IRQ_TYPE_NONE)
- ret = __irq_set_trigger(desc, irq, type);
+ ret = __irq_set_trigger(desc, irq, type);
irq_put_desc_busunlock(desc, flags);
return ret;
}
int irq_set_handler_data(unsigned int irq, void *data)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
if (!desc)
return -EINVAL;
}
EXPORT_SYMBOL(irq_set_handler_data);
+#ifndef CONFIG_XEN
/**
* irq_set_msi_desc - set MSI descriptor data for an irq
* @irq: Interrupt number
int irq_set_msi_desc(unsigned int irq, struct msi_desc *entry)
{
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;
irq_put_desc_unlock(desc, flags);
return 0;
}
+#endif
/**
* irq_set_chip_data - set irq chip data for an irq
int irq_set_chip_data(unsigned int irq, void *data)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
if (!desc)
return -EINVAL;
static void irq_state_clr_disabled(struct irq_desc *desc)
{
- desc->istate &= ~IRQS_DISABLED;
irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
- irq_compat_clr_disabled(desc);
}
static void irq_state_set_disabled(struct irq_desc *desc)
{
- desc->istate |= IRQS_DISABLED;
irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
- irq_compat_set_disabled(desc);
}
static void irq_state_clr_masked(struct irq_desc *desc)
{
- desc->istate &= ~IRQS_MASKED;
- irq_compat_clr_masked(desc);
+ irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
}
static void irq_state_set_masked(struct irq_desc *desc)
{
- desc->istate |= IRQS_MASKED;
- irq_compat_set_masked(desc);
+ irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
}
-int irq_startup(struct irq_desc *desc)
+int irq_startup(struct irq_desc *desc, bool resend)
{
+ int ret = 0;
+
irq_state_clr_disabled(desc);
desc->depth = 0;
if (desc->irq_data.chip->irq_startup) {
- int ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
+ ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
irq_state_clr_masked(desc);
- return ret;
+ } else {
+ irq_enable(desc);
}
-
- irq_enable(desc);
- return 0;
+ if (resend)
+ check_irq_resend(desc, desc->irq_data.irq);
+ return ret;
}
void irq_shutdown(struct irq_desc *desc)
desc->depth = 1;
if (desc->irq_data.chip->irq_shutdown)
desc->irq_data.chip->irq_shutdown(&desc->irq_data);
- if (desc->irq_data.chip->irq_disable)
+ else if (desc->irq_data.chip->irq_disable)
desc->irq_data.chip->irq_disable(&desc->irq_data);
else
desc->irq_data.chip->irq_mask(&desc->irq_data);
}
}
-#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
-/* Temporary migration helpers */
-static void compat_irq_mask(struct irq_data *data)
-{
- data->chip->mask(data->irq);
-}
-
-static void compat_irq_unmask(struct irq_data *data)
-{
- data->chip->unmask(data->irq);
-}
-
-static void compat_irq_ack(struct irq_data *data)
-{
- data->chip->ack(data->irq);
-}
-
-static void compat_irq_mask_ack(struct irq_data *data)
-{
- data->chip->mask_ack(data->irq);
-}
-
-static void compat_irq_eoi(struct irq_data *data)
-{
- data->chip->eoi(data->irq);
-}
-
-static void compat_irq_enable(struct irq_data *data)
-{
- data->chip->enable(data->irq);
-}
-
-static void compat_irq_disable(struct irq_data *data)
-{
- data->chip->disable(data->irq);
-}
-
-static void compat_irq_shutdown(struct irq_data *data)
-{
- data->chip->shutdown(data->irq);
-}
-
-static unsigned int compat_irq_startup(struct irq_data *data)
-{
- return data->chip->startup(data->irq);
-}
-
-static int compat_irq_set_affinity(struct irq_data *data,
- const struct cpumask *dest, bool force)
-{
- return data->chip->set_affinity(data->irq, dest);
-}
-
-static int compat_irq_set_type(struct irq_data *data, unsigned int type)
+void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu)
{
- return data->chip->set_type(data->irq, type);
-}
-
-static int compat_irq_set_wake(struct irq_data *data, unsigned int on)
-{
- return data->chip->set_wake(data->irq, on);
-}
-
-static int compat_irq_retrigger(struct irq_data *data)
-{
- return data->chip->retrigger(data->irq);
-}
-
-static void compat_bus_lock(struct irq_data *data)
-{
- data->chip->bus_lock(data->irq);
+ if (desc->irq_data.chip->irq_enable)
+ desc->irq_data.chip->irq_enable(&desc->irq_data);
+ else
+ desc->irq_data.chip->irq_unmask(&desc->irq_data);
+ cpumask_set_cpu(cpu, desc->percpu_enabled);
}
-static void compat_bus_sync_unlock(struct irq_data *data)
+void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu)
{
- data->chip->bus_sync_unlock(data->irq);
-}
-#endif
-
-/*
- * Fixup enable/disable function pointers
- */
-void irq_chip_set_defaults(struct irq_chip *chip)
-{
-#ifndef CONFIG_GENERIC_HARDIRQS_NO_DEPRECATED
- if (chip->enable)
- chip->irq_enable = compat_irq_enable;
- if (chip->disable)
- chip->irq_disable = compat_irq_disable;
- if (chip->shutdown)
- chip->irq_shutdown = compat_irq_shutdown;
- if (chip->startup)
- chip->irq_startup = compat_irq_startup;
- if (!chip->end)
- chip->end = dummy_irq_chip.end;
- if (chip->bus_lock)
- chip->irq_bus_lock = compat_bus_lock;
- if (chip->bus_sync_unlock)
- chip->irq_bus_sync_unlock = compat_bus_sync_unlock;
- if (chip->mask)
- chip->irq_mask = compat_irq_mask;
- if (chip->unmask)
- chip->irq_unmask = compat_irq_unmask;
- if (chip->ack)
- chip->irq_ack = compat_irq_ack;
- if (chip->mask_ack)
- chip->irq_mask_ack = compat_irq_mask_ack;
- if (chip->eoi)
- chip->irq_eoi = compat_irq_eoi;
- if (chip->set_affinity)
- chip->irq_set_affinity = compat_irq_set_affinity;
- if (chip->set_type)
- chip->irq_set_type = compat_irq_set_type;
- if (chip->set_wake)
- chip->irq_set_wake = compat_irq_set_wake;
- if (chip->retrigger)
- chip->irq_retrigger = compat_irq_retrigger;
-#endif
+ if (desc->irq_data.chip->irq_disable)
+ desc->irq_data.chip->irq_disable(&desc->irq_data);
+ else
+ desc->irq_data.chip->irq_mask(&desc->irq_data);
+ cpumask_clear_cpu(cpu, desc->percpu_enabled);
}
static inline void mask_ack_irq(struct irq_desc *desc)
kstat_incr_irqs_this_cpu(irq, desc);
action = desc->action;
- if (unlikely(!action || (desc->istate & IRQS_DISABLED)))
+ if (unlikely(!action || irqd_irq_disabled(&desc->irq_data)))
goto out_unlock;
- irq_compat_set_progress(desc);
- desc->istate |= IRQS_INPROGRESS;
+ irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
raw_spin_unlock_irq(&desc->lock);
action_ret = action->thread_fn(action->irq, action->dev_id);
note_interrupt(irq, desc, action_ret);
raw_spin_lock_irq(&desc->lock);
- desc->istate &= ~IRQS_INPROGRESS;
- irq_compat_clr_progress(desc);
+ irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
out_unlock:
raw_spin_unlock_irq(&desc->lock);
{
raw_spin_lock(&desc->lock);
- if (unlikely(desc->istate & IRQS_INPROGRESS))
+ if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
if (!irq_check_poll(desc))
goto out_unlock;
desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
kstat_incr_irqs_this_cpu(irq, desc);
- if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
+ if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data)))
goto out_unlock;
handle_irq_event(desc);
out_unlock:
raw_spin_unlock(&desc->lock);
}
+EXPORT_SYMBOL_GPL(handle_simple_irq);
+
+/*
+ * Called unconditionally from handle_level_irq() and only for oneshot
+ * interrupts from handle_fasteoi_irq()
+ */
+static void cond_unmask_irq(struct irq_desc *desc)
+{
+ /*
+ * We need to unmask in the following cases:
+ * - Standard level irq (IRQF_ONESHOT is not set)
+ * - Oneshot irq which did not wake the thread (caused by a
+ * spurious interrupt or a primary handler handling it
+ * completely).
+ */
+ if (!irqd_irq_disabled(&desc->irq_data) &&
+ irqd_irq_masked(&desc->irq_data) && !desc->threads_oneshot)
+ unmask_irq(desc);
+}
/**
* handle_level_irq - Level type irq handler
raw_spin_lock(&desc->lock);
mask_ack_irq(desc);
- if (unlikely(desc->istate & IRQS_INPROGRESS))
+ if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
if (!irq_check_poll(desc))
goto out_unlock;
* If its disabled or no action available
* keep it masked and get out of here
*/
- if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
+ if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data)))
goto out_unlock;
handle_irq_event(desc);
- if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT)))
- unmask_irq(desc);
+ cond_unmask_irq(desc);
+
out_unlock:
raw_spin_unlock(&desc->lock);
}
{
raw_spin_lock(&desc->lock);
- if (unlikely(desc->istate & IRQS_INPROGRESS))
+ if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
if (!irq_check_poll(desc))
goto out;
* If its disabled or no action available
* then mask it and get out of here:
*/
- if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) {
- irq_compat_set_pending(desc);
+ if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
desc->istate |= IRQS_PENDING;
mask_irq(desc);
goto out;
preflow_handler(desc);
handle_irq_event(desc);
+ if (desc->istate & IRQS_ONESHOT)
+ cond_unmask_irq(desc);
+
out_eoi:
desc->irq_data.chip->irq_eoi(&desc->irq_data);
out_unlock:
* @desc: the interrupt description structure for this irq
*
* Interrupt occures on the falling and/or rising edge of a hardware
- * signal. The occurence is latched into the irq controller hardware
+ * signal. The occurrence is latched into the irq controller hardware
* and must be acked in order to be reenabled. After the ack another
* interrupt can happen on the same source even before the first one
* is handled by the associated event handler. If this happens it
* we shouldn't process the IRQ. Mark it pending, handle
* the necessary masking and go out
*/
- if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) ||
- !desc->action))) {
+ if (unlikely(irqd_irq_disabled(&desc->irq_data) ||
+ irqd_irq_inprogress(&desc->irq_data) || !desc->action)) {
if (!irq_check_poll(desc)) {
- irq_compat_set_pending(desc);
desc->istate |= IRQS_PENDING;
mask_ack_irq(desc);
goto out_unlock;
* Renable it, if it was not disabled in meantime.
*/
if (unlikely(desc->istate & IRQS_PENDING)) {
- if (!(desc->istate & IRQS_DISABLED) &&
- (desc->istate & IRQS_MASKED))
+ if (!irqd_irq_disabled(&desc->irq_data) &&
+ irqd_irq_masked(&desc->irq_data))
unmask_irq(desc);
}
handle_irq_event(desc);
} while ((desc->istate & IRQS_PENDING) &&
- !(desc->istate & IRQS_DISABLED));
+ !irqd_irq_disabled(&desc->irq_data));
out_unlock:
raw_spin_unlock(&desc->lock);
}
+EXPORT_SYMBOL(handle_edge_irq);
+
+#ifdef CONFIG_IRQ_EDGE_EOI_HANDLER
+/**
+ * handle_edge_eoi_irq - edge eoi type IRQ handler
+ * @irq: the interrupt number
+ * @desc: the interrupt description structure for this irq
+ *
+ * Similar as the above handle_edge_irq, but using eoi and w/o the
+ * mask/unmask logic.
+ */
+void handle_edge_eoi_irq(unsigned int irq, struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+
+ raw_spin_lock(&desc->lock);
+
+ desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
+ /*
+ * If we're currently running this IRQ, or its disabled,
+ * we shouldn't process the IRQ. Mark it pending, handle
+ * the necessary masking and go out
+ */
+ if (unlikely(irqd_irq_disabled(&desc->irq_data) ||
+ irqd_irq_inprogress(&desc->irq_data) || !desc->action)) {
+ if (!irq_check_poll(desc)) {
+ desc->istate |= IRQS_PENDING;
+ goto out_eoi;
+ }
+ }
+ kstat_incr_irqs_this_cpu(irq, desc);
+
+ do {
+ if (unlikely(!desc->action))
+ goto out_eoi;
+
+ handle_irq_event(desc);
+
+ } while ((desc->istate & IRQS_PENDING) &&
+ !irqd_irq_disabled(&desc->irq_data));
+
+out_eoi:
+ chip->irq_eoi(&desc->irq_data);
+ raw_spin_unlock(&desc->lock);
+}
+#endif
/**
* handle_percpu_irq - Per CPU local irq handler
chip->irq_eoi(&desc->irq_data);
}
+/**
+ * handle_percpu_devid_irq - Per CPU local irq handler with per cpu dev ids
+ * @irq: the interrupt number
+ * @desc: the interrupt description structure for this irq
+ *
+ * Per CPU interrupts on SMP machines without locking requirements. Same as
+ * handle_percpu_irq() above but with the following extras:
+ *
+ * action->percpu_dev_id is a pointer to percpu variables which
+ * contain the real device id for the cpu on which this handler is
+ * called
+ */
+void handle_percpu_devid_irq(unsigned int irq, struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct irqaction *action = desc->action;
+ void *dev_id = __this_cpu_ptr(action->percpu_dev_id);
+ irqreturn_t res;
+
+ kstat_incr_irqs_this_cpu(irq, desc);
+
+ if (chip->irq_ack)
+ chip->irq_ack(&desc->irq_data);
+
+ trace_irq_handler_entry(irq, action);
+ res = action->handler(irq, dev_id);
+ trace_irq_handler_exit(irq, action, res);
+
+ if (chip->irq_eoi)
+ chip->irq_eoi(&desc->irq_data);
+}
+
void
__irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
const char *name)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_buslock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, 0);
if (!desc)
return;
if (handle != handle_bad_irq && is_chained) {
irq_settings_set_noprobe(desc);
irq_settings_set_norequest(desc);
- irq_startup(desc);
+ irq_settings_set_nothread(desc);
+ irq_startup(desc, true);
}
out:
irq_put_desc_busunlock(desc, flags);
void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
{
unsigned long flags;
- struct irq_desc *desc = irq_get_desc_lock(irq, &flags);
+ struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
if (!desc)
return;
irqd_set(&desc->irq_data, IRQD_PER_CPU);
if (irq_settings_can_move_pcntxt(desc))
irqd_set(&desc->irq_data, IRQD_MOVE_PCNTXT);
+ if (irq_settings_is_level(desc))
+ irqd_set(&desc->irq_data, IRQD_LEVEL);
irqd_set(&desc->irq_data, irq_settings_get_trigger_mask(desc));
irq_put_desc_unlock(desc, flags);
}
+EXPORT_SYMBOL_GPL(irq_modify_status);
/**
* irq_cpu_online - Invoke all irq_cpu_online functions.
chip = irq_data_get_irq_chip(&desc->irq_data);
if (chip && chip->irq_cpu_online &&
(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
- !(desc->istate & IRQS_DISABLED)))
+ !irqd_irq_disabled(&desc->irq_data)))
chip->irq_cpu_online(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
chip = irq_data_get_irq_chip(&desc->irq_data);
if (chip && chip->irq_cpu_offline &&
(!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
- !(desc->istate & IRQS_DISABLED)))
+ !irqd_irq_disabled(&desc->irq_data)))
chip->irq_cpu_offline(&desc->irq_data);
raw_spin_unlock_irqrestore(&desc->lock, flags);
projects / linux-flexiantxendom0-3.2.10.git / blobdiff