diff options
Diffstat (limited to 'kernel/irq/chip.c')
| -rw-r--r-- | kernel/irq/chip.c | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c index 3675c6004f2a..f51b7b6d2451 100644 --- a/kernel/irq/chip.c +++ b/kernel/irq/chip.c @@ -1098,6 +1098,112 @@ void irq_cpu_offline(void) } #ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + +#ifdef CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS +/** + * handle_fasteoi_ack_irq - irq handler for edge hierarchy + * stacked on transparent controllers + * + * @desc: the interrupt description structure for this irq + * + * Like handle_fasteoi_irq(), but for use with hierarchy where + * the irq_chip also needs to have its ->irq_ack() function + * called. + */ +void handle_fasteoi_ack_irq(struct irq_desc *desc) +{ + struct irq_chip *chip = desc->irq_data.chip; + + raw_spin_lock(&desc->lock); + + if (!irq_may_run(desc)) + goto out; + + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); + + /* + * If its disabled or no action available + * then mask it and get out of here: + */ + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { + desc->istate |= IRQS_PENDING; + mask_irq(desc); + goto out; + } + + kstat_incr_irqs_this_cpu(desc); + if (desc->istate & IRQS_ONESHOT) + mask_irq(desc); + + /* Start handling the irq */ + desc->irq_data.chip->irq_ack(&desc->irq_data); + + preflow_handler(desc); + handle_irq_event(desc); + + cond_unmask_eoi_irq(desc, chip); + + raw_spin_unlock(&desc->lock); + return; +out: + if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED)) + chip->irq_eoi(&desc->irq_data); + raw_spin_unlock(&desc->lock); +} +EXPORT_SYMBOL_GPL(handle_fasteoi_ack_irq); + +/** + * handle_fasteoi_mask_irq - irq handler for level hierarchy + * stacked on transparent controllers + * + * @desc: the interrupt description structure for this irq + * + * Like handle_fasteoi_irq(), but for use with hierarchy where + * the irq_chip also needs to have its ->irq_mask_ack() function + * called. + */ +void handle_fasteoi_mask_irq(struct irq_desc *desc) +{ + struct irq_chip *chip = desc->irq_data.chip; + + raw_spin_lock(&desc->lock); + mask_ack_irq(desc); + + if (!irq_may_run(desc)) + goto out; + + desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING); + + /* + * If its disabled or no action available + * then mask it and get out of here: + */ + if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) { + desc->istate |= IRQS_PENDING; + mask_irq(desc); + goto out; + } + + kstat_incr_irqs_this_cpu(desc); + if (desc->istate & IRQS_ONESHOT) + mask_irq(desc); + + preflow_handler(desc); + handle_irq_event(desc); + + cond_unmask_eoi_irq(desc, chip); + + raw_spin_unlock(&desc->lock); + return; +out: + if (!(chip->flags & IRQCHIP_EOI_IF_HANDLED)) + chip->irq_eoi(&desc->irq_data); + raw_spin_unlock(&desc->lock); +} +EXPORT_SYMBOL_GPL(handle_fasteoi_mask_irq); + +#endif /* CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS */ + /** * irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if * NULL) @@ -1111,6 +1217,7 @@ void irq_chip_enable_parent(struct irq_data *data) else data->chip->irq_unmask(data); } +EXPORT_SYMBOL_GPL(irq_chip_enable_parent); /** * irq_chip_disable_parent - Disable the parent interrupt (defaults to mask if @@ -1125,6 +1232,7 @@ void irq_chip_disable_parent(struct irq_data *data) else data->chip->irq_mask(data); } +EXPORT_SYMBOL_GPL(irq_chip_disable_parent); /** * irq_chip_ack_parent - Acknowledge the parent interrupt @@ -1187,6 +1295,7 @@ int irq_chip_set_affinity_parent(struct irq_data *data, return -ENOSYS; } +EXPORT_SYMBOL_GPL(irq_chip_set_affinity_parent); /** * irq_chip_set_type_parent - Set IRQ type on the parent interrupt |