diff options
Diffstat (limited to 'kernel/irq/internals.h')
| -rw-r--r-- | kernel/irq/internals.h | 146 |
1 files changed, 94 insertions, 52 deletions
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h index ca6afa267070..0164ca48da59 100644 --- a/kernel/irq/internals.h +++ b/kernel/irq/internals.h @@ -12,14 +12,15 @@ #include <linux/sched/clock.h> #ifdef CONFIG_SPARSE_IRQ -# define IRQ_BITMAP_BITS (NR_IRQS + 8196) +# define MAX_SPARSE_IRQS INT_MAX #else -# define IRQ_BITMAP_BITS NR_IRQS +# define MAX_SPARSE_IRQS NR_IRQS #endif #define istate core_internal_state__do_not_mess_with_it extern bool noirqdebug; +extern int irq_poll_cpu; extern struct irqaction chained_action; @@ -29,12 +30,14 @@ extern struct irqaction chained_action; * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed * IRQTF_AFFINITY - irq thread is requested to adjust affinity * IRQTF_FORCED_THREAD - irq action is force threaded + * IRQTF_READY - signals that irq thread is ready */ enum { IRQTF_RUNTHREAD, IRQTF_WARNED, IRQTF_AFFINITY, IRQTF_FORCED_THREAD, + IRQTF_READY, }; /* @@ -45,10 +48,15 @@ enum { * detection * IRQS_POLL_INPROGRESS - polling in progress * IRQS_ONESHOT - irq is not unmasked in primary handler - * IRQS_REPLAY - irq is replayed + * IRQS_REPLAY - irq has been resent and will not be resent + * again until the handler has run and cleared + * this flag. * IRQS_WAITING - irq is waiting - * IRQS_PENDING - irq is pending and replayed later + * IRQS_PENDING - irq needs to be resent and should be resent + * at the next available opportunity. * IRQS_SUSPENDED - irq is suspended + * IRQS_NMI - irq line is used to deliver NMIs + * IRQS_SYSFS - descriptor has been added to sysfs */ enum { IRQS_AUTODETECT = 0x00000001, @@ -60,6 +68,8 @@ enum { IRQS_PENDING = 0x00000200, IRQS_SUSPENDED = 0x00000800, IRQS_TIMINGS = 0x00001000, + IRQS_NMI = 0x00002000, + IRQS_SYSFS = 0x00004000, }; #include "debug.h" @@ -78,9 +88,10 @@ 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_enable(struct irq_desc *desc); +extern void irq_shutdown_and_deactivate(struct irq_desc *desc); extern void irq_disable(struct irq_desc *desc); extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); @@ -94,17 +105,18 @@ static inline void irq_mark_irq(unsigned int irq) { } extern void irq_mark_irq(unsigned int irq); #endif -extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); - -irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc, unsigned int *flags); +irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc); irqreturn_t handle_irq_event_percpu(struct irq_desc *desc); irqreturn_t handle_irq_event(struct irq_desc *desc); /* Resending of interrupts :*/ -void check_irq_resend(struct irq_desc *desc); -bool irq_wait_for_poll(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); void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); +void wake_threads_waitq(struct irq_desc *desc); + #ifdef CONFIG_PROC_FS extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); @@ -121,10 +133,6 @@ static inline void unregister_handler_proc(unsigned int irq, extern bool irq_can_set_affinity_usr(unsigned int irq); -extern int irq_select_affinity_usr(unsigned int irq); - -extern void irq_set_thread_affinity(struct irq_desc *desc); - extern int irq_do_set_affinity(struct irq_data *data, const struct cpumask *dest, bool force); @@ -134,6 +142,10 @@ 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) { @@ -153,38 +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) @@ -242,12 +249,18 @@ static inline void irq_state_set_masked(struct irq_desc *desc) #undef __irqd_to_state -static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) +static inline void __kstat_incr_irqs_this_cpu(struct irq_desc *desc) { - __this_cpu_inc(*desc->kstat_irqs); + __this_cpu_inc(desc->kstat_irqs->cnt); __this_cpu_inc(kstat.irqs_sum); } +static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) +{ + __kstat_incr_irqs_this_cpu(desc); + desc->tot_count++; +} + static inline int irq_desc_get_node(struct irq_desc *desc) { return irq_common_data_get_node(&desc->irq_common_data); @@ -258,12 +271,17 @@ static inline int irq_desc_is_chained(struct irq_desc *desc) return (desc->action && desc->action == &chained_action); } +static inline bool irq_is_nmi(struct irq_desc *desc) +{ + return desc->istate & IRQS_NMI; +} + #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 @@ -346,6 +364,16 @@ static inline int irq_timing_decode(u64 value, u64 *timestamp) 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 @@ -359,15 +387,8 @@ static __always_inline void record_irq_time(struct irq_desc *desc) if (!static_branch_likely(&irq_timing_enabled)) return; - if (desc->istate & IRQS_TIMINGS) { - struct irq_timings *timings = this_cpu_ptr(&irq_timings); - - timings->values[timings->count & IRQ_TIMINGS_MASK] = - irq_timing_encode(local_clock(), - irq_desc_get_irq(desc)); - - timings->count++; - } + 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) {} @@ -391,7 +412,7 @@ irq_init_generic_chip(struct irq_chip_generic *gc, const char *name, #ifdef CONFIG_GENERIC_PENDING_IRQ static inline bool irq_can_move_pcntxt(struct irq_data *data) { - return irqd_can_move_in_process_context(data); + return !(data->chip->flags & IRQCHIP_MOVE_DEFERRED); } static inline bool irq_move_pending(struct irq_data *data) { @@ -412,6 +433,7 @@ static inline struct cpumask *irq_desc_get_pending_mask(struct irq_desc *desc) return desc->pending_mask; } bool irq_fixup_move_pending(struct irq_desc *desc, bool force_clear); +void irq_force_complete_move(struct irq_desc *desc); #else /* CONFIG_GENERIC_PENDING_IRQ */ static inline bool irq_can_move_pcntxt(struct irq_data *data) { @@ -437,6 +459,7 @@ static inline bool irq_fixup_move_pending(struct irq_desc *desc, bool fclear) { return false; } +static inline void irq_force_complete_move(struct irq_desc *desc) { } #endif /* !CONFIG_GENERIC_PENDING_IRQ */ #if !defined(CONFIG_IRQ_DOMAIN) || !defined(CONFIG_IRQ_DOMAIN_HIERARCHY) @@ -451,9 +474,28 @@ static inline void irq_domain_deactivate_irq(struct irq_data *data) } #endif +static inline struct irq_data *irqd_get_parent_data(struct irq_data *irqd) +{ +#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY + return irqd->parent_data; +#else + return NULL; +#endif +} + #ifdef CONFIG_GENERIC_IRQ_DEBUGFS #include <linux/debugfs.h> +struct irq_bit_descr { + unsigned int mask; + char *name; +}; + +#define BIT_MASK_DESCR(m) { .mask = m, .name = #m } + +void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state, + const struct irq_bit_descr *sd, int size); + void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc); static inline void irq_remove_debugfs_entry(struct irq_desc *desc) { |