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/*
* IRQ subsystem internal functions and variables:
*
* Do not ever include this file from anything else than
* kernel/irq/. Do not even think about using any information outside
* of this file for your non core code.
*/
#include <linux/irqdesc.h>
#ifdef CONFIG_SPARSE_IRQ
# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
#else
# define IRQ_BITMAP_BITS NR_IRQS
#endif
#include "compat.h"
#include "settings.h"
#define istate core_internal_state__do_not_mess_with_it
extern int noirqdebug;
/*
* Bits used by threaded handlers:
* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
* IRQTF_DIED - handler thread died
* IRQTF_WARNED - warning "IRQ_WAKE_THREAD w/o thread_fn" has been printed
* IRQTF_AFFINITY - irq thread is requested to adjust affinity
*/
enum {
IRQTF_RUNTHREAD,
IRQTF_DIED,
IRQTF_WARNED,
IRQTF_AFFINITY,
};
/*
* Bit masks for desc->state
*
* IRQS_AUTODETECT - autodetection in progress
* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
* detection
* IRQS_POLL_INPROGRESS - polling in progress
* IRQS_INPROGRESS - Interrupt in progress
* IRQS_ONESHOT - irq is not unmasked in primary handler
* IRQS_REPLAY - irq is replayed
* IRQS_WAITING - irq is waiting
* IRQS_DISABLED - irq is disabled
* IRQS_PENDING - irq is pending and replayed later
* IRQS_MASKED - irq is masked
* IRQS_SUSPENDED - irq is suspended
*/
enum {
IRQS_AUTODETECT = 0x00000001,
IRQS_SPURIOUS_DISABLED = 0x00000002,
IRQS_POLL_INPROGRESS = 0x00000008,
IRQS_INPROGRESS = 0x00000010,
IRQS_ONESHOT = 0x00000020,
IRQS_REPLAY = 0x00000040,
IRQS_WAITING = 0x00000080,
IRQS_DISABLED = 0x00000100,
IRQS_PENDING = 0x00000200,
IRQS_MASKED = 0x00000400,
IRQS_SUSPENDED = 0x00000800,
};
#define irq_data_to_desc(data) container_of(data, struct irq_desc, irq_data)
/* Set default functions for irq_chip structures: */
extern void irq_chip_set_defaults(struct irq_chip *chip);
/* Set default handler: */
extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
unsigned long flags);
extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
extern int irq_startup(struct irq_desc *desc);
extern void irq_shutdown(struct irq_desc *desc);
extern void irq_enable(struct irq_desc *desc);
extern void irq_disable(struct irq_desc *desc);
extern void init_kstat_irqs(struct irq_desc *desc, int node, int nr);
irqreturn_t handle_irq_event_percpu(struct irq_desc *desc, struct irqaction *action);
irqreturn_t handle_irq_event(struct irq_desc *desc);
/* Resending of interrupts :*/
void check_irq_resend(struct irq_desc *desc, unsigned int irq);
bool irq_wait_for_poll(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);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
#else
static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
static inline void register_handler_proc(unsigned int irq,
struct irqaction *action) { }
static inline void unregister_handler_proc(unsigned int irq,
struct irqaction *action) { }
#endif
extern int irq_select_affinity_usr(unsigned int irq, struct cpumask *mask);
extern void irq_set_thread_affinity(struct irq_desc *desc);
/* Inline functions for support of irq chips on slow busses */
static inline void chip_bus_lock(struct irq_desc *desc)
{
if (unlikely(desc->irq_data.chip->irq_bus_lock))
desc->irq_data.chip->irq_bus_lock(&desc->irq_data);
}
static inline void chip_bus_sync_unlock(struct irq_desc *desc)
{
if (unlikely(desc->irq_data.chip->irq_bus_sync_unlock))
desc->irq_data.chip->irq_bus_sync_unlock(&desc->irq_data);
}
/*
* Debugging printout:
*/
#include <linux/kallsyms.h>
#define P(f) if (desc->status & f) printk("%14s set\n", #f)
#define PS(f) if (desc->istate & f) printk("%14s set\n", #f)
static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
{
printk("irq %d, desc: %p, depth: %d, count: %d, unhandled: %d\n",
irq, desc, desc->depth, desc->irq_count, desc->irqs_unhandled);
printk("->handle_irq(): %p, ", desc->handle_irq);
print_symbol("%s\n", (unsigned long)desc->handle_irq);
printk("->irq_data.chip(): %p, ", desc->irq_data.chip);
print_symbol("%s\n", (unsigned long)desc->irq_data.chip);
printk("->action(): %p\n", desc->action);
if (desc->action) {
printk("->action->handler(): %p, ", desc->action->handler);
print_symbol("%s\n", (unsigned long)desc->action->handler);
}
P(IRQ_LEVEL);
#ifdef CONFIG_IRQ_PER_CPU
P(IRQ_PER_CPU);
#endif
P(IRQ_NOPROBE);
P(IRQ_NOREQUEST);
P(IRQ_NOAUTOEN);
PS(IRQS_AUTODETECT);
PS(IRQS_INPROGRESS);
PS(IRQS_REPLAY);
PS(IRQS_WAITING);
PS(IRQS_DISABLED);
PS(IRQS_PENDING);
PS(IRQS_MASKED);
}
#undef P
#undef PS
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