11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * IRQ subsystem internal functions and variables: 3dbec07baSThomas Gleixner * 4dbec07baSThomas Gleixner * Do not ever include this file from anything else than 5dbec07baSThomas Gleixner * kernel/irq/. Do not even think about using any information outside 6dbec07baSThomas Gleixner * of this file for your non core code. 71da177e4SLinus Torvalds */ 8e144710bSThomas Gleixner #include <linux/irqdesc.h> 98f945a33SThomas Gleixner #include <linux/kernel_stat.h> 101da177e4SLinus Torvalds 11c1ee6264SThomas Gleixner #ifdef CONFIG_SPARSE_IRQ 12c1ee6264SThomas Gleixner # define IRQ_BITMAP_BITS (NR_IRQS + 8196) 13c1ee6264SThomas Gleixner #else 14c1ee6264SThomas Gleixner # define IRQ_BITMAP_BITS NR_IRQS 15c1ee6264SThomas Gleixner #endif 16c1ee6264SThomas Gleixner 17dbec07baSThomas Gleixner #define istate core_internal_state__do_not_mess_with_it 18dbec07baSThomas Gleixner 192329abfaSRusty Russell extern bool noirqdebug; 201da177e4SLinus Torvalds 21e509bd7dSMika Westerberg extern struct irqaction chained_action; 22e509bd7dSMika Westerberg 231535dfacSThomas Gleixner /* 241535dfacSThomas Gleixner * Bits used by threaded handlers: 251535dfacSThomas Gleixner * IRQTF_RUNTHREAD - signals that the interrupt handler thread should run 261535dfacSThomas Gleixner * IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed 271535dfacSThomas Gleixner * IRQTF_AFFINITY - irq thread is requested to adjust affinity 288d32a307SThomas Gleixner * IRQTF_FORCED_THREAD - irq action is force threaded 291535dfacSThomas Gleixner */ 301535dfacSThomas Gleixner enum { 311535dfacSThomas Gleixner IRQTF_RUNTHREAD, 321535dfacSThomas Gleixner IRQTF_WARNED, 331535dfacSThomas Gleixner IRQTF_AFFINITY, 348d32a307SThomas Gleixner IRQTF_FORCED_THREAD, 351535dfacSThomas Gleixner }; 361535dfacSThomas Gleixner 37bd062e76SThomas Gleixner /* 38a257954bSJiang Liu * Bit masks for desc->core_internal_state__do_not_mess_with_it 39bd062e76SThomas Gleixner * 40bd062e76SThomas Gleixner * IRQS_AUTODETECT - autodetection in progress 417acdd53eSThomas Gleixner * IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt 427acdd53eSThomas Gleixner * detection 436954b75bSThomas Gleixner * IRQS_POLL_INPROGRESS - polling in progress 443d67baecSThomas Gleixner * IRQS_ONESHOT - irq is not unmasked in primary handler 45163ef309SThomas Gleixner * IRQS_REPLAY - irq is replayed 46163ef309SThomas Gleixner * IRQS_WAITING - irq is waiting 472a0d6fb3SThomas Gleixner * IRQS_PENDING - irq is pending and replayed later 48c531e836SThomas Gleixner * IRQS_SUSPENDED - irq is suspended 49bd062e76SThomas Gleixner */ 50bd062e76SThomas Gleixner enum { 51bd062e76SThomas Gleixner IRQS_AUTODETECT = 0x00000001, 527acdd53eSThomas Gleixner IRQS_SPURIOUS_DISABLED = 0x00000002, 536954b75bSThomas Gleixner IRQS_POLL_INPROGRESS = 0x00000008, 543d67baecSThomas Gleixner IRQS_ONESHOT = 0x00000020, 55163ef309SThomas Gleixner IRQS_REPLAY = 0x00000040, 56163ef309SThomas Gleixner IRQS_WAITING = 0x00000080, 572a0d6fb3SThomas Gleixner IRQS_PENDING = 0x00000200, 58c531e836SThomas Gleixner IRQS_SUSPENDED = 0x00000800, 59bd062e76SThomas Gleixner }; 60bd062e76SThomas Gleixner 611ce6068dSThomas Gleixner #include "debug.h" 621ce6068dSThomas Gleixner #include "settings.h" 631ce6068dSThomas Gleixner 64a1ff541aSJiang Liu extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags); 6579ff1cdaSJiang Liu extern void __disable_irq(struct irq_desc *desc); 6679ff1cdaSJiang Liu extern void __enable_irq(struct irq_desc *desc); 670c5d1eb7SDavid Brownell 68b4bc724eSThomas Gleixner extern int irq_startup(struct irq_desc *desc, bool resend); 6946999238SThomas Gleixner extern void irq_shutdown(struct irq_desc *desc); 7087923470SThomas Gleixner extern void irq_enable(struct irq_desc *desc); 7187923470SThomas Gleixner extern void irq_disable(struct irq_desc *desc); 7231d9d9b6SMarc Zyngier extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu); 7331d9d9b6SMarc Zyngier extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu); 74d4d5e089SThomas Gleixner extern void mask_irq(struct irq_desc *desc); 75d4d5e089SThomas Gleixner extern void unmask_irq(struct irq_desc *desc); 76328a4978SThomas Gleixner extern void unmask_threaded_irq(struct irq_desc *desc); 7746999238SThomas Gleixner 78f63b6a05SThomas Gleixner #ifdef CONFIG_SPARSE_IRQ 79f63b6a05SThomas Gleixner static inline void irq_mark_irq(unsigned int irq) { } 80f63b6a05SThomas Gleixner #else 81f63b6a05SThomas Gleixner extern void irq_mark_irq(unsigned int irq); 82f63b6a05SThomas Gleixner #endif 83f63b6a05SThomas Gleixner 8485ac16d0SYinghai Lu extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr); 850fa0ebbfSMike Travis 8671f64340SHuang Shijie irqreturn_t handle_irq_event_percpu(struct irq_desc *desc); 874912609fSThomas Gleixner irqreturn_t handle_irq_event(struct irq_desc *desc); 884912609fSThomas Gleixner 89e144710bSThomas Gleixner /* Resending of interrupts :*/ 900798abebSJiang Liu void check_irq_resend(struct irq_desc *desc); 91fe200ae4SThomas Gleixner bool irq_wait_for_poll(struct irq_desc *desc); 92a92444c6SThomas Gleixner void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action); 93e144710bSThomas Gleixner 941da177e4SLinus Torvalds #ifdef CONFIG_PROC_FS 952c6927a3SYinghai Lu extern void register_irq_proc(unsigned int irq, struct irq_desc *desc); 9613bfe99eSThomas Gleixner extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc); 971da177e4SLinus Torvalds extern void register_handler_proc(unsigned int irq, struct irqaction *action); 981da177e4SLinus Torvalds extern void unregister_handler_proc(unsigned int irq, struct irqaction *action); 991da177e4SLinus Torvalds #else 1002c6927a3SYinghai Lu static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { } 10113bfe99eSThomas Gleixner static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { } 1021da177e4SLinus Torvalds static inline void register_handler_proc(unsigned int irq, 1031da177e4SLinus Torvalds struct irqaction *action) { } 1041da177e4SLinus Torvalds static inline void unregister_handler_proc(unsigned int irq, 1051da177e4SLinus Torvalds struct irqaction *action) { } 1061da177e4SLinus Torvalds #endif 1071da177e4SLinus Torvalds 108*9c255583SThomas Gleixner extern bool irq_can_set_affinity_usr(unsigned int irq); 109*9c255583SThomas Gleixner 1103b8249e7SThomas Gleixner extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask); 111f6d87f4bSThomas Gleixner 112591d2fb0SThomas Gleixner extern void irq_set_thread_affinity(struct irq_desc *desc); 11357b150ccSYinghai Lu 114818b0f3bSJiang Liu extern int irq_do_set_affinity(struct irq_data *data, 115818b0f3bSJiang Liu const struct cpumask *dest, bool force); 116818b0f3bSJiang Liu 11770aedd24SThomas Gleixner /* Inline functions for support of irq chips on slow busses */ 1183876ec9eSThomas Gleixner static inline void chip_bus_lock(struct irq_desc *desc) 11970aedd24SThomas Gleixner { 1203876ec9eSThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_lock)) 1213876ec9eSThomas Gleixner desc->irq_data.chip->irq_bus_lock(&desc->irq_data); 12270aedd24SThomas Gleixner } 12370aedd24SThomas Gleixner 1243876ec9eSThomas Gleixner static inline void chip_bus_sync_unlock(struct irq_desc *desc) 12570aedd24SThomas Gleixner { 1263876ec9eSThomas Gleixner if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock)) 1273876ec9eSThomas Gleixner desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data); 12870aedd24SThomas Gleixner } 12970aedd24SThomas Gleixner 13031d9d9b6SMarc Zyngier #define _IRQ_DESC_CHECK (1 << 0) 13131d9d9b6SMarc Zyngier #define _IRQ_DESC_PERCPU (1 << 1) 13231d9d9b6SMarc Zyngier 13331d9d9b6SMarc Zyngier #define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK) 13431d9d9b6SMarc Zyngier #define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU) 13531d9d9b6SMarc Zyngier 136f944b5a7SDaniel Lezcano #define for_each_action_of_desc(desc, act) \ 137f944b5a7SDaniel Lezcano for (act = desc->act; act; act = act->next) 138f944b5a7SDaniel Lezcano 139d5eb4ad2SThomas Gleixner struct irq_desc * 14031d9d9b6SMarc Zyngier __irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus, 14131d9d9b6SMarc Zyngier unsigned int check); 142d5eb4ad2SThomas Gleixner void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus); 143d5eb4ad2SThomas Gleixner 144d5eb4ad2SThomas Gleixner static inline struct irq_desc * 14531d9d9b6SMarc Zyngier irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check) 146d5eb4ad2SThomas Gleixner { 14731d9d9b6SMarc Zyngier return __irq_get_desc_lock(irq, flags, true, check); 148d5eb4ad2SThomas Gleixner } 149d5eb4ad2SThomas Gleixner 150d5eb4ad2SThomas Gleixner static inline void 151d5eb4ad2SThomas Gleixner irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags) 152d5eb4ad2SThomas Gleixner { 153d5eb4ad2SThomas Gleixner __irq_put_desc_unlock(desc, flags, true); 154d5eb4ad2SThomas Gleixner } 155d5eb4ad2SThomas Gleixner 156d5eb4ad2SThomas Gleixner static inline struct irq_desc * 15731d9d9b6SMarc Zyngier irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check) 158d5eb4ad2SThomas Gleixner { 15931d9d9b6SMarc Zyngier return __irq_get_desc_lock(irq, flags, false, check); 160d5eb4ad2SThomas Gleixner } 161d5eb4ad2SThomas Gleixner 162d5eb4ad2SThomas Gleixner static inline void 163d5eb4ad2SThomas Gleixner irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags) 164d5eb4ad2SThomas Gleixner { 165d5eb4ad2SThomas Gleixner __irq_put_desc_unlock(desc, flags, false); 166d5eb4ad2SThomas Gleixner } 167d5eb4ad2SThomas Gleixner 168b354286eSBoqun Feng #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) 169b354286eSBoqun Feng 17043f77759SIngo Molnar /* 171f230b6d5SThomas Gleixner * Manipulation functions for irq_data.state 172f230b6d5SThomas Gleixner */ 173f230b6d5SThomas Gleixner static inline void irqd_set_move_pending(struct irq_data *d) 174f230b6d5SThomas Gleixner { 1750d0b4c86SJiang Liu __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING; 176f230b6d5SThomas Gleixner } 177f230b6d5SThomas Gleixner 178f230b6d5SThomas Gleixner static inline void irqd_clr_move_pending(struct irq_data *d) 179f230b6d5SThomas Gleixner { 1800d0b4c86SJiang Liu __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING; 181f230b6d5SThomas Gleixner } 182a005677bSThomas Gleixner 183a005677bSThomas Gleixner static inline void irqd_clear(struct irq_data *d, unsigned int mask) 184a005677bSThomas Gleixner { 1850d0b4c86SJiang Liu __irqd_to_state(d) &= ~mask; 186a005677bSThomas Gleixner } 187a005677bSThomas Gleixner 188a005677bSThomas Gleixner static inline void irqd_set(struct irq_data *d, unsigned int mask) 189a005677bSThomas Gleixner { 1900d0b4c86SJiang Liu __irqd_to_state(d) |= mask; 191a005677bSThomas Gleixner } 192a005677bSThomas Gleixner 1932bdd1055SThomas Gleixner static inline bool irqd_has_set(struct irq_data *d, unsigned int mask) 1942bdd1055SThomas Gleixner { 1950d0b4c86SJiang Liu return __irqd_to_state(d) & mask; 1962bdd1055SThomas Gleixner } 1978f945a33SThomas Gleixner 198b354286eSBoqun Feng #undef __irqd_to_state 199b354286eSBoqun Feng 200b51bf95cSJiang Liu static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc) 2018f945a33SThomas Gleixner { 2028f945a33SThomas Gleixner __this_cpu_inc(*desc->kstat_irqs); 2038f945a33SThomas Gleixner __this_cpu_inc(kstat.irqs_sum); 2048f945a33SThomas Gleixner } 205cab303beSThomas Gleixner 2066783011bSJiang Liu static inline int irq_desc_get_node(struct irq_desc *desc) 2076783011bSJiang Liu { 208449e9caeSJiang Liu return irq_common_data_get_node(&desc->irq_common_data); 2096783011bSJiang Liu } 2106783011bSJiang Liu 2114717f133SGrygorii Strashko static inline int irq_desc_is_chained(struct irq_desc *desc) 2124717f133SGrygorii Strashko { 2134717f133SGrygorii Strashko return (desc->action && desc->action == &chained_action); 2144717f133SGrygorii Strashko } 2154717f133SGrygorii Strashko 216cab303beSThomas Gleixner #ifdef CONFIG_PM_SLEEP 2179ce7a258SThomas Gleixner bool irq_pm_check_wakeup(struct irq_desc *desc); 218cab303beSThomas Gleixner void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action); 219cab303beSThomas Gleixner void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action); 220cab303beSThomas Gleixner #else 2219ce7a258SThomas Gleixner static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; } 222cab303beSThomas Gleixner static inline void 223cab303beSThomas Gleixner irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { } 224cab303beSThomas Gleixner static inline void 225cab303beSThomas Gleixner irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { } 226cab303beSThomas Gleixner #endif 227