166 lines
5.1 KiB
C
166 lines
5.1 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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#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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#include "compat.h"
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#include "settings.h"
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#define istate core_internal_state__do_not_mess_with_it
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extern int 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_DIED - handler thread died
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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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*/
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enum {
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IRQTF_RUNTHREAD,
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IRQTF_DIED,
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IRQTF_WARNED,
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IRQTF_AFFINITY,
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};
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/*
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* Bit masks for desc->state
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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_INPROGRESS - Interrupt 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_DISABLED - irq is disabled
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* IRQS_PENDING - irq is pending and replayed later
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* IRQS_MASKED - irq is masked
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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_INPROGRESS = 0x00000010,
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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_DISABLED = 0x00000100,
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IRQS_PENDING = 0x00000200,
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IRQS_MASKED = 0x00000400,
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IRQS_SUSPENDED = 0x00000800,
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};
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#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
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/* Set default functions for irq_chip structures: */
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extern void irq_chip_set_defaults(struct irq_chip *chip);
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/* Set default handler: */
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extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
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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, bool susp);
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extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
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extern int irq_startup(struct irq_desc *desc);
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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 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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#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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/* 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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/*
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* Debugging printout:
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*/
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#include <linux/kallsyms.h>
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#define P(f) if (desc->status & f) printk("%14s set\n", #f)
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#define PS(f) if (desc->istate & f) printk("%14s set\n", #f)
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static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
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{
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printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
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irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
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printk("->handle_irq(): %p, ", desc->handle_irq);
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print_symbol("%s\n", (unsigned long)desc->handle_irq);
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printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
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print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
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printk("->action(): %p\n", desc->action);
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if (desc->action) {
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printk("->action->handler(): %p, ", desc->action->handler);
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print_symbol("%s\n", (unsigned long)desc->action->handler);
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}
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P(IRQ_LEVEL);
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#ifdef CONFIG_IRQ_PER_CPU
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P(IRQ_PER_CPU);
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#endif
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P(IRQ_NOPROBE);
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P(IRQ_NOREQUEST);
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P(IRQ_NOAUTOEN);
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PS(IRQS_AUTODETECT);
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PS(IRQS_INPROGRESS);
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PS(IRQS_REPLAY);
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PS(IRQS_WAITING);
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PS(IRQS_DISABLED);
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PS(IRQS_PENDING);
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PS(IRQS_MASKED);
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}
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#undef P
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#undef PS
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