Something went wrong. Try again.
(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_IRQDESC_H#define _LINUX_IRQDESC_H
#include <linux/irq_work.h>#include <linux/kobject.h>#include <linux/mutex.h>#include <linux/rcupdate.h>
/* * Core internal functions to deal with irq descriptors */
struct irq_affinity_notify;struct proc_dir_entry;struct module;struct irq_desc;struct irq_domain;struct pt_regs;
/** * struct irqstat - interrupt statistics * @cnt: real-time interrupt count * @ref: snapshot of interrupt count */struct irqstat { unsigned int cnt;#ifdef CONFIG_GENERIC_IRQ_STAT_SNAPSHOT unsigned int ref;#endif};
/** * struct irq_redirect - interrupt redirection metadata * @work: Harg irq_work item for handler execution on a different CPU * @target_cpu: CPU to run irq handler on in case the current CPU is not part * of the irq affinity mask */struct irq_redirect { struct irq_work work; unsigned int target_cpu;};
/** * struct irq_desc - interrupt descriptor * @irq_common_data: per irq and chip data passed down to chip functions * @kstat_irqs: irq stats per cpu * @handle_irq: highlevel irq-events handler * @action: the irq action chain * @status_use_accessors: 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 * @tot_count: stats field for non-percpu irqs * @last_unhandled: aging timer for unhandled count * @irq_count: stats field to detect stalled irqs * @irqs_unhandled: stats field for spurious unhandled interrupts * @threads_handled: stats field for deferred spurious detection of threaded handlers * @threads_handled_last: comparator field for deferred spurious detection of threaded handlers * @lock: locking for SMP * @redirect: Facility for redirecting interrupts via irq_work * @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 * @nr_actions: number of installed actions on this descriptor * @no_suspend_depth: number of irqactions on a irq descriptor with * IRQF_NO_SUSPEND set * @force_resume_depth: number of irqactions on a irq descriptor with * IRQF_FORCE_RESUME set * @refcnt: Reference count mainly for /proc/interrupts * @rcu: rcu head for delayed free * @kobj: kobject used to represent this struct in sysfs * @request_mutex: mutex to protect request/free before locking desc->lock * @dir: /proc/irq/ procfs entry * @debugfs_file: dentry for the debugfs file * @name: flow handler name for /proc/interrupts output */struct irq_desc { struct irq_common_data irq_common_data; struct irq_data irq_data; struct irqstat __percpu *kstat_irqs; irq_flow_handler_t handle_irq; 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 long tot_count; unsigned long last_unhandled; /* Aging timer for unhandled count */ unsigned int irq_count; /* For detecting broken IRQs */ unsigned int irqs_unhandled; atomic_t threads_handled; int threads_handled_last; raw_spinlock_t lock; struct cpumask *percpu_enabled;#ifdef CONFIG_SMP struct irq_redirect redirect; 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_PM_SLEEP unsigned int nr_actions; unsigned int no_suspend_depth; unsigned int cond_suspend_depth; unsigned int force_resume_depth;#endif#ifdef CONFIG_PROC_FS struct proc_dir_entry *dir;#endif#ifdef CONFIG_GENERIC_IRQ_DEBUGFS struct dentry *debugfs_file; const char *dev_name;#endif rcuref_t refcnt;#ifdef CONFIG_SPARSE_IRQ struct rcu_head rcu; struct kobject kobj;#endif struct mutex request_mutex; int parent_irq; struct module *owner; const char *name;#ifdef CONFIG_HARDIRQS_SW_RESEND struct hlist_node resend_node;#endif} ____cacheline_internodealigned_in_smp;
#ifdef CONFIG_SPARSE_IRQextern void irq_lock_sparse(void);extern void irq_unlock_sparse(void);#elsestatic inline void irq_lock_sparse(void) { }static inline void irq_unlock_sparse(void) { }extern struct irq_desc irq_desc[NR_IRQS];#endif
static inline unsigned int irq_desc_kstat_cpu(struct irq_desc *desc, unsigned int cpu){ return per_cpu(desc->kstat_irqs->cnt, cpu);}
static inline struct irq_desc *irq_data_to_desc(struct irq_data *data){ return container_of(data->common, struct irq_desc, irq_common_data);}
static inline unsigned int irq_desc_get_irq(struct irq_desc *desc){ return desc->irq_data.irq;}
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_common_data.handler_data;}
/* * Architectures call this to let the generic IRQ layer * handle an interrupt. */static inline void generic_handle_irq_desc(struct irq_desc *desc){ desc->handle_irq(desc);}
int handle_irq_desc(struct irq_desc *desc);int generic_handle_irq(unsigned int irq);int generic_handle_irq_safe(unsigned int irq);
#ifdef CONFIG_IRQ_DOMAIN/* * Convert a HW interrupt number to a logical one using a IRQ domain, * and handle the result interrupt number. Return -EINVAL if * conversion failed. */int generic_handle_domain_irq(struct irq_domain *domain, irq_hw_number_t hwirq);int generic_handle_domain_irq_safe(struct irq_domain *domain, irq_hw_number_t hwirq);int generic_handle_domain_nmi(struct irq_domain *domain, irq_hw_number_t hwirq);bool generic_handle_demux_domain_irq(struct irq_domain *domain, irq_hw_number_t hwirq);#endif
/* Test to see if a driver has successfully requested an irq */static inline int irq_desc_has_action(struct irq_desc *desc){ return desc && desc->action != NULL;}
/** * irq_set_handler_locked - Set irq handler from a locked region * @data: Pointer to the irq_data structure which identifies the irq * @handler: Flow control handler function for this interrupt * * Sets the handler in the irq descriptor associated to @data. * * Must be called with irq_desc locked and valid parameters. Typical * call site is the irq_set_type() callback. */static inline void irq_set_handler_locked(struct irq_data *data, irq_flow_handler_t handler){ struct irq_desc *desc = irq_data_to_desc(data);
desc->handle_irq = handler;}
/** * irq_set_chip_handler_name_locked - Set chip, handler and name from a locked region * @data: Pointer to the irq_data structure for which the chip is set * @chip: Pointer to the new irq chip * @handler: Flow control handler function for this interrupt * @name: Name of the interrupt * * Replace the irq chip at the proper hierarchy level in @data and * sets the handler and name in the associated irq descriptor. * * Must be called with irq_desc locked and valid parameters. */static inline voidirq_set_chip_handler_name_locked(struct irq_data *data, const struct irq_chip *chip, irq_flow_handler_t handler, const char *name){ struct irq_desc *desc = irq_data_to_desc(data);
desc->handle_irq = handler; desc->name = name; data->chip = (struct irq_chip *)chip;}
bool irq_check_status_bit(unsigned int irq, unsigned int bitmask);
static inline bool irq_balancing_disabled(unsigned int irq){ return irq_check_status_bit(irq, IRQ_NO_BALANCING_MASK);}
static inline bool irq_is_percpu(unsigned int irq){ return irq_check_status_bit(irq, IRQ_PER_CPU);}
static inline bool irq_is_percpu_devid(unsigned int irq){ return irq_check_status_bit(irq, IRQ_PER_CPU_DEVID);}
void __irq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class, struct lock_class_key *request_class);static inline voidirq_set_lockdep_class(unsigned int irq, struct lock_class_key *lock_class, struct lock_class_key *request_class){ if (IS_ENABLED(CONFIG_LOCKDEP)) __irq_set_lockdep_class(irq, lock_class, request_class);}
#endif