diff options
Diffstat (limited to 'kernel/irq/internals.h')
| -rw-r--r-- | kernel/irq/internals.h | 164 |
1 files changed, 27 insertions, 137 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index b0290849c395..9412e57056f5 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -20,6 +20,7 @@ #define istate core_internal_state__do_not_mess_with_it extern bool noirqdebug; +extern int irq_poll_cpu; extern struct irqaction chained_action; @@ -87,6 +88,7 @@ extern void __enable_irq(struct irq_desc *desc); extern int irq_activate(struct irq_desc *desc); extern int irq_activate_and_startup(struct irq_desc *desc, bool resend); extern int irq_startup(struct irq_desc *desc, bool resend, bool force); +extern void irq_startup_managed(struct irq_desc *desc); extern void irq_shutdown(struct irq_desc *desc); extern void irq_shutdown_and_deactivate(struct irq_desc *desc); @@ -111,7 +113,6 @@ irqreturn_t handle_irq_event(struct irq_desc *desc); int check_irq_resend(struct irq_desc *desc, bool inject); void clear_irq_resend(struct irq_desc *desc); void irq_resend_init(struct irq_desc *desc); -bool irq_wait_for_poll(struct irq_desc *desc); void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); void wake_threads_waitq(struct irq_desc *desc); @@ -134,6 +135,7 @@ extern bool irq_can_set_affinity_usr(unsigned int irq); extern int irq_do_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force); +extern void irq_affinity_schedule_notify_work(struct irq_desc *desc); #ifdef CONFIG_SMP extern int irq_setup_affinity(struct irq_desc *desc); @@ -141,6 +143,9 @@ extern int irq_setup_affinity(struct irq_desc *desc); static inline int irq_setup_affinity(struct irq_desc *desc) { return 0; } #endif +#define for_each_action_of_desc(desc, act) \ + for (act = desc->action; act; act = act->next) + /* Inline functions for support of irq chips on slow busses */ static inline void chip_bus_lock(struct irq_desc *desc) { @@ -160,38 +165,33 @@ static inline void chip_bus_sync_unlock(struct irq_desc *desc) #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) -#define for_each_action_of_desc(desc, act) \ - for (act = desc->action; act; act = act->next) - -struct irq_desc * -__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, - unsigned int check); +struct irq_desc *__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, + unsigned int check); void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); -static inline struct irq_desc * -irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) -{ - return __irq_get_desc_lock(irq, flags, true, check); -} +__DEFINE_CLASS_IS_CONDITIONAL(irqdesc_lock, true); +__DEFINE_UNLOCK_GUARD(irqdesc_lock, struct irq_desc, + __irq_put_desc_unlock(_T->lock, _T->flags, _T->bus), + unsigned long flags; bool bus); -static inline void -irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) +static inline class_irqdesc_lock_t class_irqdesc_lock_constructor(unsigned int irq, bool bus, + unsigned int check) { - __irq_put_desc_unlock(desc, flags, true); -} + class_irqdesc_lock_t _t = { .bus = bus, }; -static inline struct irq_desc * -irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) -{ - return __irq_get_desc_lock(irq, flags, false, check); -} + _t.lock = __irq_get_desc_lock(irq, &_t.flags, bus, check); -static inline void -irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) -{ - __irq_put_desc_unlock(desc, flags, false); + return _t; } +#define scoped_irqdesc_get_and_lock(_irq, _check) \ + scoped_guard(irqdesc_lock, _irq, false, _check) + +#define scoped_irqdesc_get_and_buslock(_irq, _check) \ + scoped_guard(irqdesc_lock, _irq, true, _check) + +#define scoped_irqdesc ((struct irq_desc *)(__guard_ptr(irqdesc_lock)(&scope))) + #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) static inline unsigned int irqd_get(struct irq_data *d) @@ -277,127 +277,17 @@ static inline bool irq_is_nmi(struct irq_desc *desc) } #ifdef CONFIG_PM_SLEEP -bool irq_pm_check_wakeup(struct irq_desc *desc); +void irq_pm_handle_wakeup(struct irq_desc *desc); void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); #else -static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } +static inline void irq_pm_handle_wakeup(struct irq_desc *desc) { } static inline void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } static inline void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } #endif -#ifdef CONFIG_IRQ_TIMINGS - -#define IRQ_TIMINGS_SHIFT 5 -#define IRQ_TIMINGS_SIZE (1 << IRQ_TIMINGS_SHIFT) -#define IRQ_TIMINGS_MASK (IRQ_TIMINGS_SIZE - 1) - -/** - * struct irq_timings - irq timings storing structure - * @values: a circular buffer of u64 encoded <timestamp,irq> values - * @count: the number of elements in the array - */ -struct irq_timings { - u64 values[IRQ_TIMINGS_SIZE]; - int count; -}; - -DECLARE_PER_CPU(struct irq_timings, irq_timings); - -extern void irq_timings_free(int irq); -extern int irq_timings_alloc(int irq); - -static inline void irq_remove_timings(struct irq_desc *desc) -{ - desc->istate &= ~IRQS_TIMINGS; - - irq_timings_free(irq_desc_get_irq(desc)); -} - -static inline void irq_setup_timings(struct irq_desc *desc, struct irqaction *act) -{ - int irq = irq_desc_get_irq(desc); - int ret; - - /* - * We don't need the measurement because the idle code already - * knows the next expiry event. - */ - if (act->flags & __IRQF_TIMER) - return; - - /* - * In case the timing allocation fails, we just want to warn, - * not fail, so letting the system boot anyway. - */ - ret = irq_timings_alloc(irq); - if (ret) { - pr_warn("Failed to allocate irq timing stats for irq%d (%d)", - irq, ret); - return; - } - - desc->istate |= IRQS_TIMINGS; -} - -extern void irq_timings_enable(void); -extern void irq_timings_disable(void); - -DECLARE_STATIC_KEY_FALSE(irq_timing_enabled); - -/* - * The interrupt number and the timestamp are encoded into a single - * u64 variable to optimize the size. - * 48 bit time stamp and 16 bit IRQ number is way sufficient. - * Who cares an IRQ after 78 hours of idle time? - */ -static inline u64 irq_timing_encode(u64 timestamp, int irq) -{ - return (timestamp << 16) | irq; -} - -static inline int irq_timing_decode(u64 value, u64 *timestamp) -{ - *timestamp = value >> 16; - return value & U16_MAX; -} - -static __always_inline void irq_timings_push(u64 ts, int irq) -{ - struct irq_timings *timings = this_cpu_ptr(&irq_timings); - - timings->values[timings->count & IRQ_TIMINGS_MASK] = - irq_timing_encode(ts, irq); - - timings->count++; -} - -/* - * The function record_irq_time is only called in one place in the - * interrupts handler. We want this function always inline so the code - * inside is embedded in the function and the static key branching - * code can act at the higher level. Without the explicit - * __always_inline we can end up with a function call and a small - * overhead in the hotpath for nothing. - */ -static __always_inline void record_irq_time(struct irq_desc *desc) -{ - if (!static_branch_likely(&irq_timing_enabled)) - return; - - if (desc->istate & IRQS_TIMINGS) - irq_timings_push(local_clock(), irq_desc_get_irq(desc)); -} -#else -static inline void irq_remove_timings(struct irq_desc *desc) {} -static inline void irq_setup_timings(struct irq_desc *desc, - struct irqaction *act) {}; -static inline void record_irq_time(struct irq_desc *desc) {} -#endif /* CONFIG_IRQ_TIMINGS */ - - #ifdef CONFIG_GENERIC_IRQ_CHIP void irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, int num_ct, unsigned int irq_base, |