213 lines
6.7 KiB
C
213 lines
6.7 KiB
C
/*
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* IRQ subsystem internal functions and variables:
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*
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* Do not ever include this file from anything else than
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* kernel/irq/. Do not even think about using any information outside
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* of this file for your non core code.
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*/
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#include <linux/irqdesc.h>
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#include <linux/kernel_stat.h>
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#ifdef CONFIG_SPARSE_IRQ
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# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
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#else
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# define IRQ_BITMAP_BITS NR_IRQS
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#endif
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#define istate core_internal_state__do_not_mess_with_it
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extern bool noirqdebug;
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/*
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* Bits used by threaded handlers:
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* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
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* IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
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* IRQTF_AFFINITY - irq thread is requested to adjust affinity
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* IRQTF_FORCED_THREAD - irq action is force threaded
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*/
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enum {
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IRQTF_RUNTHREAD,
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IRQTF_WARNED,
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IRQTF_AFFINITY,
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IRQTF_FORCED_THREAD,
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};
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/*
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* Bit masks for desc->core_internal_state__do_not_mess_with_it
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*
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* IRQS_AUTODETECT - autodetection in progress
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* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
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* detection
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* IRQS_POLL_INPROGRESS - polling in progress
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* IRQS_ONESHOT - irq is not unmasked in primary handler
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* IRQS_REPLAY - irq is replayed
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* IRQS_WAITING - irq is waiting
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* IRQS_PENDING - irq is pending and replayed later
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* IRQS_SUSPENDED - irq is suspended
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*/
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enum {
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IRQS_AUTODETECT = 0x00000001,
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IRQS_SPURIOUS_DISABLED = 0x00000002,
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IRQS_POLL_INPROGRESS = 0x00000008,
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IRQS_ONESHOT = 0x00000020,
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IRQS_REPLAY = 0x00000040,
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IRQS_WAITING = 0x00000080,
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IRQS_PENDING = 0x00000200,
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IRQS_SUSPENDED = 0x00000800,
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};
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#include "debug.h"
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#include "settings.h"
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#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
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extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
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unsigned long flags);
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extern void __disable_irq(struct irq_desc *desc, unsigned int irq);
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extern void __enable_irq(struct irq_desc *desc, unsigned int irq);
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extern int irq_startup(struct irq_desc *desc, bool resend);
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extern void irq_shutdown(struct irq_desc *desc);
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extern void irq_enable(struct irq_desc *desc);
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extern void irq_disable(struct irq_desc *desc);
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extern void irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
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extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
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extern void mask_irq(struct irq_desc *desc);
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extern void unmask_irq(struct irq_desc *desc);
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extern void unmask_threaded_irq(struct irq_desc *desc);
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#ifdef CONFIG_SPARSE_IRQ
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static inline void irq_mark_irq(unsigned int irq) { }
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extern void irq_lock_sparse(void);
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extern void irq_unlock_sparse(void);
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#else
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extern void irq_mark_irq(unsigned int irq);
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static inline void irq_lock_sparse(void) { }
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static inline void irq_unlock_sparse(void) { }
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#endif
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extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
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irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
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irqreturn_t handle_irq_event(struct irq_desc *desc);
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/* Resending of interrupts :*/
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void check_irq_resend(struct irq_desc *desc, unsigned int irq);
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bool irq_wait_for_poll(struct irq_desc *desc);
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void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
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#ifdef CONFIG_PROC_FS
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extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
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extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
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extern void register_handler_proc(unsigned int irq, struct irqaction *action);
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extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
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#else
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static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
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static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
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static inline void register_handler_proc(unsigned int irq,
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struct irqaction *action) { }
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static inline void unregister_handler_proc(unsigned int irq,
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struct irqaction *action) { }
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#endif
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extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
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extern void irq_set_thread_affinity(struct irq_desc *desc);
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extern int irq_do_set_affinity(struct irq_data *data,
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const struct cpumask *dest, bool force);
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/* Inline functions for support of irq chips on slow busses */
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static inline void chip_bus_lock(struct irq_desc *desc)
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{
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if (unlikely(desc->irq_data.chip->irq_bus_lock))
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desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
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}
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static inline void chip_bus_sync_unlock(struct irq_desc *desc)
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{
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if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
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desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
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}
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#define _IRQ_DESC_CHECK (1 << 0)
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#define _IRQ_DESC_PERCPU (1 << 1)
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#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
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#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
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struct irq_desc *
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__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
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unsigned int check);
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void __irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags, bool bus);
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static inline struct irq_desc *
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irq_get_desc_buslock(unsigned int irq, unsigned long *flags, unsigned int check)
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{
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return __irq_get_desc_lock(irq, flags, true, check);
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}
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static inline void
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irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
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{
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__irq_put_desc_unlock(desc, flags, true);
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}
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static inline struct irq_desc *
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irq_get_desc_lock(unsigned int irq, unsigned long *flags, unsigned int check)
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{
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return __irq_get_desc_lock(irq, flags, false, check);
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}
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static inline void
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irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
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{
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__irq_put_desc_unlock(desc, flags, false);
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}
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/*
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* Manipulation functions for irq_data.state
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*/
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static inline void irqd_set_move_pending(struct irq_data *d)
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{
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d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
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}
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static inline void irqd_clr_move_pending(struct irq_data *d)
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{
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d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
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}
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static inline void irqd_clear(struct irq_data *d, unsigned int mask)
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{
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d->state_use_accessors &= ~mask;
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}
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static inline void irqd_set(struct irq_data *d, unsigned int mask)
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{
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d->state_use_accessors |= mask;
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}
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static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
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{
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return d->state_use_accessors & mask;
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}
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static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
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{
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__this_cpu_inc(*desc->kstat_irqs);
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__this_cpu_inc(kstat.irqs_sum);
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}
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#ifdef CONFIG_PM_SLEEP
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bool irq_pm_check_wakeup(struct irq_desc *desc);
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void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action);
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void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action);
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#else
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static inline bool irq_pm_check_wakeup(struct irq_desc *desc) { return false; }
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static inline void
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irq_pm_install_action(struct irq_desc *desc, struct irqaction *action) { }
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static inline void
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irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
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#endif
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