mirror of https://gitee.com/openkylin/linux.git
218 lines
6.6 KiB
C
218 lines
6.6 KiB
C
/*
|
|
* 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>
|
|
#include <linux/kernel_stat.h>
|
|
|
|
#ifdef CONFIG_SPARSE_IRQ
|
|
# define IRQ_BITMAP_BITS (NR_IRQS + 8196)
|
|
#else
|
|
# define IRQ_BITMAP_BITS NR_IRQS
|
|
#endif
|
|
|
|
#define istate core_internal_state__do_not_mess_with_it
|
|
|
|
extern bool noirqdebug;
|
|
|
|
extern struct irqaction chained_action;
|
|
|
|
/*
|
|
* Bits used by threaded handlers:
|
|
* IRQTF_RUNTHREAD - signals that the interrupt handler thread should run
|
|
* 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
|
|
*/
|
|
enum {
|
|
IRQTF_RUNTHREAD,
|
|
IRQTF_WARNED,
|
|
IRQTF_AFFINITY,
|
|
IRQTF_FORCED_THREAD,
|
|
};
|
|
|
|
/*
|
|
* Bit masks for desc->core_internal_state__do_not_mess_with_it
|
|
*
|
|
* IRQS_AUTODETECT - autodetection in progress
|
|
* IRQS_SPURIOUS_DISABLED - was disabled due to spurious interrupt
|
|
* detection
|
|
* IRQS_POLL_INPROGRESS - polling in progress
|
|
* IRQS_ONESHOT - irq is not unmasked in primary handler
|
|
* IRQS_REPLAY - irq is replayed
|
|
* IRQS_WAITING - irq is waiting
|
|
* IRQS_PENDING - irq is pending and replayed later
|
|
* IRQS_SUSPENDED - irq is suspended
|
|
*/
|
|
enum {
|
|
IRQS_AUTODETECT = 0x00000001,
|
|
IRQS_SPURIOUS_DISABLED = 0x00000002,
|
|
IRQS_POLL_INPROGRESS = 0x00000008,
|
|
IRQS_ONESHOT = 0x00000020,
|
|
IRQS_REPLAY = 0x00000040,
|
|
IRQS_WAITING = 0x00000080,
|
|
IRQS_PENDING = 0x00000200,
|
|
IRQS_SUSPENDED = 0x00000800,
|
|
};
|
|
|
|
#include "debug.h"
|
|
#include "settings.h"
|
|
|
|
extern int __irq_set_trigger(struct irq_desc *desc, unsigned long flags);
|
|
extern void __disable_irq(struct irq_desc *desc);
|
|
extern void __enable_irq(struct irq_desc *desc);
|
|
|
|
extern int irq_startup(struct irq_desc *desc, bool resend);
|
|
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 irq_percpu_enable(struct irq_desc *desc, unsigned int cpu);
|
|
extern void irq_percpu_disable(struct irq_desc *desc, unsigned int cpu);
|
|
extern void mask_irq(struct irq_desc *desc);
|
|
extern void unmask_irq(struct irq_desc *desc);
|
|
extern void unmask_threaded_irq(struct irq_desc *desc);
|
|
|
|
#ifdef CONFIG_SPARSE_IRQ
|
|
static inline void irq_mark_irq(unsigned int irq) { }
|
|
#else
|
|
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);
|
|
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);
|
|
void __irq_wake_thread(struct irq_desc *desc, struct irqaction *action);
|
|
|
|
#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);
|
|
|
|
extern int irq_do_set_affinity(struct irq_data *data,
|
|
const struct cpumask *dest, bool force);
|
|
|
|
/* 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);
|
|
}
|
|
|
|
#define _IRQ_DESC_CHECK (1 << 0)
|
|
#define _IRQ_DESC_PERCPU (1 << 1)
|
|
|
|
#define IRQ_GET_DESC_CHECK_GLOBAL (_IRQ_DESC_CHECK)
|
|
#define IRQ_GET_DESC_CHECK_PERCPU (_IRQ_DESC_CHECK | _IRQ_DESC_PERCPU)
|
|
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
irq_put_desc_busunlock(struct irq_desc *desc, unsigned long flags)
|
|
{
|
|
__irq_put_desc_unlock(desc, flags, true);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
static inline void
|
|
irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
|
|
{
|
|
__irq_put_desc_unlock(desc, flags, false);
|
|
}
|
|
|
|
/*
|
|
* Manipulation functions for irq_data.state
|
|
*/
|
|
static inline void irqd_set_move_pending(struct irq_data *d)
|
|
{
|
|
__irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
|
|
}
|
|
|
|
static inline void irqd_clr_move_pending(struct irq_data *d)
|
|
{
|
|
__irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
|
|
}
|
|
|
|
static inline void irqd_clear(struct irq_data *d, unsigned int mask)
|
|
{
|
|
__irqd_to_state(d) &= ~mask;
|
|
}
|
|
|
|
static inline void irqd_set(struct irq_data *d, unsigned int mask)
|
|
{
|
|
__irqd_to_state(d) |= mask;
|
|
}
|
|
|
|
static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
|
|
{
|
|
return __irqd_to_state(d) & mask;
|
|
}
|
|
|
|
static inline void kstat_incr_irqs_this_cpu(struct irq_desc *desc)
|
|
{
|
|
__this_cpu_inc(*desc->kstat_irqs);
|
|
__this_cpu_inc(kstat.irqs_sum);
|
|
}
|
|
|
|
static inline int irq_desc_get_node(struct irq_desc *desc)
|
|
{
|
|
return irq_common_data_get_node(&desc->irq_common_data);
|
|
}
|
|
|
|
static inline int irq_desc_is_chained(struct irq_desc *desc)
|
|
{
|
|
return (desc->action && desc->action == &chained_action);
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
bool irq_pm_check_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_install_action(struct irq_desc *desc, struct irqaction *action) { }
|
|
static inline void
|
|
irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) { }
|
|
#endif
|