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genirq: Add chip hooks for taking CPUs on/off line.
[ tglx: Removed the enabled argument as this is now available in irq_data ] Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: linux-mips@linux-mips.org Cc: ralf@linux-mips.org LKML-Reference: <1301081931-11240-3-git-send-email-ddaney@caviumnetworks.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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2 changed files with 66 additions and 0 deletions
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@ -279,6 +279,8 @@ static inline bool irqd_irq_disabled(struct irq_data *d)
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* @irq_set_wake: enable/disable power-management wake-on of an IRQ
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* @irq_bus_lock: function to lock access to slow bus (i2c) chips
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* @irq_bus_sync_unlock:function to sync and unlock slow bus (i2c) chips
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* @irq_cpu_online: configure an interrupt source for a secondary CPU
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* @irq_cpu_offline: un-configure an interrupt source for a secondary CPU
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* @irq_print_chip: optional to print special chip info in show_interrupts
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* @flags: chip specific flags
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*
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@ -327,6 +329,9 @@ struct irq_chip {
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void (*irq_bus_lock)(struct irq_data *data);
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void (*irq_bus_sync_unlock)(struct irq_data *data);
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void (*irq_cpu_online)(struct irq_data *data);
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void (*irq_cpu_offline)(struct irq_data *data);
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void (*irq_print_chip)(struct irq_data *data, struct seq_file *p);
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unsigned long flags;
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@ -372,6 +377,9 @@ struct irqaction;
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extern int setup_irq(unsigned int irq, struct irqaction *new);
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extern void remove_irq(unsigned int irq, struct irqaction *act);
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extern void irq_cpu_online(void);
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extern void irq_cpu_offline(void);
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#ifdef CONFIG_GENERIC_HARDIRQS
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#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
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@ -696,3 +696,61 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
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irq_put_desc_unlock(desc, flags);
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}
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/**
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* irq_cpu_online - Invoke all irq_cpu_online functions.
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*
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* Iterate through all irqs and invoke the chip.irq_cpu_online()
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* for each.
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*/
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void irq_cpu_online(void)
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{
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struct irq_desc *desc;
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struct irq_chip *chip;
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unsigned long flags;
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unsigned int irq;
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for_each_active_irq(irq) {
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desc = irq_to_desc(irq);
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if (!desc)
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continue;
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raw_spin_lock_irqsave(&desc->lock, flags);
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chip = irq_data_get_irq_chip(&desc->irq_data);
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if (chip && chip->irq_cpu_online)
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chip->irq_cpu_online(&desc->irq_data);
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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}
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}
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/**
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* irq_cpu_offline - Invoke all irq_cpu_offline functions.
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*
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* Iterate through all irqs and invoke the chip.irq_cpu_offline()
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* for each.
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*/
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void irq_cpu_offline(void)
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{
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struct irq_desc *desc;
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struct irq_chip *chip;
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unsigned long flags;
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unsigned int irq;
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for_each_active_irq(irq) {
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desc = irq_to_desc(irq);
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if (!desc)
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continue;
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raw_spin_lock_irqsave(&desc->lock, flags);
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chip = irq_data_get_irq_chip(&desc->irq_data);
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if (chip && chip->irq_cpu_offline)
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chip->irq_cpu_offline(&desc->irq_data);
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raw_spin_unlock_irqrestore(&desc->lock, flags);
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}
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}
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