Edit File: irqdesc.h
#ifndef _LINUX_IRQDESC_H #define _LINUX_IRQDESC_H /* * Core internal functions to deal with irq descriptors * * This include will move to kernel/irq once we cleaned up the tree. * For now it's included from <linux/irq.h> */ struct irq_affinity_notify; struct proc_dir_entry; struct module; struct irq_desc; /** * struct irq_desc - interrupt descriptor * @irq_data: per irq and chip data passed down to chip functions * @kstat_irqs: irq stats per cpu * @handle_irq: highlevel irq-events handler * @preflow_handler: handler called before the flow handler (currently used by sparc) * @action: the irq action chain * @status: status information * @core_internal_state__do_not_mess_with_it: core internal status information * @depth: disable-depth, for nested irq_disable() calls * @wake_depth: enable depth, for multiple irq_set_irq_wake() callers * @irq_count: stats field to detect stalled irqs * @last_unhandled: aging timer for unhandled count * @irqs_unhandled: stats field for spurious unhandled interrupts * @lock: locking for SMP * @affinity_hint: hint to user space for preferred irq affinity * @affinity_notify: context for notification of affinity changes * @pending_mask: pending rebalanced interrupts * @threads_oneshot: bitfield to handle shared oneshot threads * @threads_active: number of irqaction threads currently running * @wait_for_threads: wait queue for sync_irq to wait for threaded handlers * @dir: /proc/irq/ procfs entry * @name: flow handler name for /proc/interrupts output */ struct irq_desc { struct irq_data irq_data; unsigned int __percpu *kstat_irqs; irq_flow_handler_t handle_irq; #ifdef CONFIG_IRQ_PREFLOW_FASTEOI irq_preflow_handler_t preflow_handler; #endif struct irqaction *action; /* IRQ action list */ unsigned int status_use_accessors; unsigned int core_internal_state__do_not_mess_with_it; unsigned int depth; /* nested irq disables */ unsigned int wake_depth; /* nested wake enables */ unsigned int irq_count; /* For detecting broken IRQs */ RH_KABI_FILL_HOLE(unsigned int tot_count) unsigned long last_unhandled; /* Aging timer for unhandled count */ unsigned int irqs_unhandled; raw_spinlock_t lock; struct cpumask *percpu_enabled; #ifdef CONFIG_SMP const struct cpumask *affinity_hint; struct irq_affinity_notify *affinity_notify; #ifdef CONFIG_GENERIC_PENDING_IRQ cpumask_var_t pending_mask; #endif #endif unsigned long threads_oneshot; atomic_t threads_active; wait_queue_head_t wait_for_threads; #ifdef CONFIG_PROC_FS struct proc_dir_entry *dir; #endif int parent_irq; struct module *owner; const char *name; } ____cacheline_internodealigned_in_smp; #ifndef CONFIG_SPARSE_IRQ extern struct irq_desc irq_desc[NR_IRQS]; #endif #ifdef CONFIG_GENERIC_HARDIRQS static inline struct irq_data *irq_desc_get_irq_data(struct irq_desc *desc) { return &desc->irq_data; } static inline struct irq_chip *irq_desc_get_chip(struct irq_desc *desc) { return desc->irq_data.chip; } static inline void *irq_desc_get_chip_data(struct irq_desc *desc) { return desc->irq_data.chip_data; } static inline void *irq_desc_get_handler_data(struct irq_desc *desc) { return desc->irq_data.handler_data; } static inline struct msi_desc *irq_desc_get_msi_desc(struct irq_desc *desc) { return desc->irq_data.msi_desc; } /* * Architectures call this to let the generic IRQ layer * handle an interrupt. If the descriptor is attached to an * irqchip-style controller then we call the ->handle_irq() handler, * and it calls __do_IRQ() if it's attached to an irqtype-style controller. */ static inline void generic_handle_irq_desc(unsigned int irq, struct irq_desc *desc) { desc->handle_irq(irq, desc); } int generic_handle_irq(unsigned int irq); /* Test to see if a driver has successfully requested an irq */ static inline int irq_has_action(unsigned int irq) { struct irq_desc *desc = irq_to_desc(irq); return desc->action != NULL; } /* caller has locked the irq_desc and both params are valid */ static inline void __irq_set_handler_locked(unsigned int irq, irq_flow_handler_t handler) { struct irq_desc *desc; desc = irq_to_desc(irq); desc->handle_irq = handler; } /* caller has locked the irq_desc and both params are valid */ static inline void __irq_set_chip_handler_name_locked(unsigned int irq, struct irq_chip *chip, irq_flow_handler_t handler, const char *name) { struct irq_desc *desc; desc = irq_to_desc(irq); irq_desc_get_irq_data(desc)->chip = chip; desc->handle_irq = handler; desc->name = name; } static inline int irq_balancing_disabled(unsigned int irq) { struct irq_desc *desc; desc = irq_to_desc(irq); return desc->status_use_accessors & IRQ_NO_BALANCING_MASK; } static inline void irq_set_lockdep_class(unsigned int irq, struct lock_class_key *class) { struct irq_desc *desc = irq_to_desc(irq); if (desc) lockdep_set_class(&desc->lock, class); } #ifdef CONFIG_IRQ_PREFLOW_FASTEOI static inline void __irq_set_preflow_handler(unsigned int irq, irq_preflow_handler_t handler) { struct irq_desc *desc; desc = irq_to_desc(irq); desc->preflow_handler = handler; } #endif #endif #endif