10 #include <linux/irq.h>
115 static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,  in desc_set_defaults()  argument
124 	desc->irq_data.irq = irq;  in desc_set_defaults()
194 static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)  in irq_insert_desc()  argument
196 	MA_STATE(mas, &sparse_irqs, irq, irq);  in irq_insert_desc()
200 static void delete_irq_desc(unsigned int irq)  in delete_irq_desc()  argument
202 	MA_STATE(mas, &sparse_irqs, irq, irq);  in delete_irq_desc()
210 static int init_desc(struct irq_desc *desc, int irq, int node,  in init_desc()  argument
228 	desc_set_defaults(irq, desc, node, affinity, owner);  in init_desc()
350 ATTRIBUTE_GROUPS(irq);
358 static void irq_sysfs_add(int irq, struct irq_desc *desc)  in irq_sysfs_add()  argument
366 		if (kobject_add(&desc->kobj, irq_kobj_base, "%d", irq))  in irq_sysfs_add()
367 			pr_warn("Failed to add kobject for irq %d\n", irq);  in irq_sysfs_add()
388 	int irq;  in irq_sysfs_init()  local
390 	/* Prevent concurrent irq alloc/free */  in irq_sysfs_init()
392 	irq_kobj_base = kobject_create_and_add("irq", kernel_kobj);  in irq_sysfs_init()
397 	for_each_irq_desc(irq, desc)  in irq_sysfs_init()
398 		irq_sysfs_add(irq, desc);  in irq_sysfs_init()
409 static void irq_sysfs_add(int irq, struct irq_desc *desc) {}  in irq_sysfs_add()  argument
414 struct irq_desc *irq_to_desc(unsigned int irq)  in irq_to_desc()  argument
416 	return mtree_load(&sparse_irqs, irq);  in irq_to_desc()
432 static struct irq_desc *alloc_desc(int irq, int node, unsigned int flags,  in alloc_desc()  argument
443 	ret = init_desc(desc, irq, node, flags, affinity, owner);  in alloc_desc()
468 static void free_desc(unsigned int irq)  in free_desc()  argument
470 	struct irq_desc *desc = irq_to_desc(irq);  in free_desc()
473 	unregister_irq_proc(irq, desc);  in free_desc()
485 	delete_irq_desc(irq);  in free_desc()
615 struct irq_desc *irq_to_desc(unsigned int irq)  in irq_to_desc()  argument
617 	return (irq < NR_IRQS) ? irq_desc + irq : NULL;  in irq_to_desc()
621 static void free_desc(unsigned int irq)  in free_desc()  argument
623 	struct irq_desc *desc = irq_to_desc(irq);  in free_desc()
626 		desc_set_defaults(irq, desc, irq_desc_get_node(desc), NULL, NULL);  in free_desc()
627 	delete_irq_desc(irq);  in free_desc()
650 void irq_mark_irq(unsigned int irq)  in irq_mark_irq()  argument
653 	irq_insert_desc(irq, irq_desc + irq);  in irq_mark_irq()
674  * generic_handle_irq - Invoke the handler for a particular irq
675  * @irq:	The irq number to handle
679  * 		This function must be called from an IRQ context with irq regs
682 int generic_handle_irq(unsigned int irq)  in generic_handle_irq()  argument
684 	return handle_irq_desc(irq_to_desc(irq));  in generic_handle_irq()
689  * generic_handle_irq_safe - Invoke the handler for a particular irq from any
691  * @irq:	The irq number to handle
695  * This function can be called from any context (IRQ or process context). It
696  * will report an error if not invoked from IRQ context and the irq has been
697  * marked to enforce IRQ-context only.
699 int generic_handle_irq_safe(unsigned int irq)  in generic_handle_irq_safe()  argument
705 	ret = handle_irq_desc(irq_to_desc(irq));  in generic_handle_irq_safe()
713  * generic_handle_domain_irq - Invoke the handler for a HW irq belonging
716  * @hwirq:	The HW irq number to convert to a logical one
720  * 		This function must be called from an IRQ context with irq regs
730  * generic_handle_irq_safe - Invoke the handler for a HW irq belonging
733  * @hwirq:	The HW irq number to convert to a logical one
737  * This function can be called from any context (IRQ or process
738  * context). If the interrupt is marked as 'enforce IRQ-context only' then
757  * @hwirq:	The HW irq number to convert to a logical one
761  * 		This function must be called from an NMI context with irq regs
774  * irq_free_descs - free irq descriptors
792  * __irq_alloc_descs - allocate and initialize a range of irq descriptors
793  * @irq:	Allocate for specific irq number if irq >= 0
794  * @from:	Start the search from this irq number
796  * @node:	Preferred node on which the irq descriptor should be allocated
799  *		hints where the irq descriptors should be allocated and which
802  * Returns the first irq number or error code
804 int __ref __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int node,  in __irq_alloc_descs()  argument
812 	if (irq >= 0) {  in __irq_alloc_descs()
813 		if (from > irq)  in __irq_alloc_descs()
815 		from = irq;  in __irq_alloc_descs()
828 	if (irq >=0 && start != irq)  in __irq_alloc_descs()
840  * irq_get_next_irq - get next allocated irq number
843  * Returns next irq number after offset or nr_irqs if none is found.
850 struct irq_desc *__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,  in __irq_get_desc_lock()  argument
855 	desc = irq_to_desc(irq);  in __irq_get_desc_lock()
882 int irq_set_percpu_devid_partition(unsigned int irq,  in irq_set_percpu_devid_partition()  argument
885 	struct irq_desc *desc = irq_to_desc(irq);  in irq_set_percpu_devid_partition()
897 	irq_set_percpu_devid_flags(irq);  in irq_set_percpu_devid_partition()
901 int irq_set_percpu_devid(unsigned int irq)  in irq_set_percpu_devid()  argument
903 	return irq_set_percpu_devid_partition(irq, NULL);  in irq_set_percpu_devid()
906 int irq_get_percpu_devid_partition(unsigned int irq, struct cpumask *affinity)  in irq_get_percpu_devid_partition()  argument
908 	struct irq_desc *desc = irq_to_desc(irq);  in irq_get_percpu_devid_partition()
920 void kstat_incr_irq_this_cpu(unsigned int irq)  in kstat_incr_irq_this_cpu()  argument
922 	kstat_incr_irqs_this_cpu(irq_to_desc(irq));  in kstat_incr_irq_this_cpu()
927  * @irq:	The interrupt number
931  * @irq. The caller must ensure that the interrupt is not removed
934 unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)  in kstat_irqs_cpu()  argument
936 	struct irq_desc *desc = irq_to_desc(irq);  in kstat_irqs_cpu()
956 static unsigned int kstat_irqs(unsigned int irq)  in kstat_irqs()  argument
958 	struct irq_desc *desc = irq_to_desc(irq);  in kstat_irqs()
970 	unsigned int irq;  in kstat_snapshot_irqs()  local
972 	for_each_irq_desc(irq, desc) {  in kstat_snapshot_irqs()
979 unsigned int kstat_get_irq_since_snapshot(unsigned int irq)  in kstat_get_irq_since_snapshot()  argument
981 	struct irq_desc *desc = irq_to_desc(irq);  in kstat_get_irq_since_snapshot()
992  * @irq:	The interrupt number
994  * Returns the sum of interrupt counts on all cpus since boot for @irq.
1000 unsigned int kstat_irqs_usr(unsigned int irq)  in kstat_irqs_usr()  argument
1005 	sum = kstat_irqs(irq);  in kstat_irqs_usr()
1011 void __irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class,  in __irq_set_lockdep_class()  argument
1014 	struct irq_desc *desc = irq_to_desc(irq);  in __irq_set_lockdep_class()