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head/sys/sys/interrupt.h

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* $FreeBSD$ * $FreeBSD$
*/ */
#ifndef _SYS_INTERRUPT_H_ #ifndef _SYS_INTERRUPT_H_
#define _SYS_INTERRUPT_H_ #define _SYS_INTERRUPT_H_
#include <sys/_lock.h> #include <sys/_lock.h>
#include <sys/_mutex.h> #include <sys/_mutex.h>
#include <sys/ck.h>
struct intr_event; struct intr_event;
struct intr_thread; struct intr_thread;
struct trapframe; struct trapframe;
/* /*
* Describe a hardware interrupt handler. * Describe a hardware interrupt handler.
* *
* Multiple interrupt handlers for a specific event can be chained * Multiple interrupt handlers for a specific event can be chained
* together. * together.
*/ */
struct intr_handler { struct intr_handler {
driver_filter_t *ih_filter; /* Filter handler function. */ driver_filter_t *ih_filter; /* Filter handler function. */
driver_intr_t *ih_handler; /* Threaded handler function. */ driver_intr_t *ih_handler; /* Threaded handler function. */
void *ih_argument; /* Argument to pass to handlers. */ void *ih_argument; /* Argument to pass to handlers. */
int ih_flags; int ih_flags;
char ih_name[MAXCOMLEN + 1]; /* Name of handler. */ char ih_name[MAXCOMLEN + 1]; /* Name of handler. */
struct intr_event *ih_event; /* Event we are connected to. */ struct intr_event *ih_event; /* Event we are connected to. */
int ih_need; /* Needs service. */ int ih_need; /* Needs service. */
TAILQ_ENTRY(intr_handler) ih_next; /* Next handler for this event. */ CK_SLIST_ENTRY(intr_handler) ih_next; /* Next handler for this event. */
u_char ih_pri; /* Priority of this handler. */ u_char ih_pri; /* Priority of this handler. */
struct intr_thread *ih_thread; /* Ithread for filtered handler. */ struct intr_thread *ih_thread; /* Ithread for filtered handler. */
}; };
/* Interrupt handle flags kept in ih_flags */ /* Interrupt handle flags kept in ih_flags */
#define IH_EXCLUSIVE 0x00000002 /* Exclusive interrupt. */ #define IH_EXCLUSIVE 0x00000002 /* Exclusive interrupt. */
#define IH_ENTROPY 0x00000004 /* Device is a good entropy source. */ #define IH_ENTROPY 0x00000004 /* Device is a good entropy source. */
#define IH_DEAD 0x00000008 /* Handler should be removed. */ #define IH_DEAD 0x00000008 /* Handler should be removed. */
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* event handlers with that event. It can then use * event handlers with that event. It can then use
* intr_event_execute_handlers() to execute non-filter handlers. * intr_event_execute_handlers() to execute non-filter handlers.
* Currently filter handlers are not supported by this, but that can * Currently filter handlers are not supported by this, but that can
* be added by splitting out the filter loop from intr_event_handle() * be added by splitting out the filter loop from intr_event_handle()
* if desired. * if desired.
*/ */
struct intr_event { struct intr_event {
TAILQ_ENTRY(intr_event) ie_list; TAILQ_ENTRY(intr_event) ie_list;
TAILQ_HEAD(, intr_handler) ie_handlers; /* Interrupt handlers. */ CK_SLIST_HEAD(, intr_handler) ie_handlers; /* Interrupt handlers. */
char ie_name[MAXCOMLEN + 1]; /* Individual event name. */ char ie_name[MAXCOMLEN + 1]; /* Individual event name. */
char ie_fullname[MAXCOMLEN + 1]; char ie_fullname[MAXCOMLEN + 1];
struct mtx ie_lock; struct mtx ie_lock;
void *ie_source; /* Cookie used by MD code. */ void *ie_source; /* Cookie used by MD code. */
struct intr_thread *ie_thread; /* Thread we are connected to. */ struct intr_thread *ie_thread; /* Thread we are connected to. */
void (*ie_pre_ithread)(void *); void (*ie_pre_ithread)(void *);
void (*ie_post_ithread)(void *); void (*ie_post_ithread)(void *);
void (*ie_post_filter)(void *); void (*ie_post_filter)(void *);
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int intr_event_create(struct intr_event **event, void *source, int intr_event_create(struct intr_event **event, void *source,
int flags, int irq, void (*pre_ithread)(void *), int flags, int irq, void (*pre_ithread)(void *),
void (*post_ithread)(void *), void (*post_filter)(void *), void (*post_ithread)(void *), void (*post_filter)(void *),
int (*assign_cpu)(void *, int), const char *fmt, ...) int (*assign_cpu)(void *, int), const char *fmt, ...)
__printflike(9, 10); __printflike(9, 10);
int intr_event_describe_handler(struct intr_event *ie, void *cookie, int intr_event_describe_handler(struct intr_event *ie, void *cookie,
const char *descr); const char *descr);
int intr_event_destroy(struct intr_event *ie); int intr_event_destroy(struct intr_event *ie);
void intr_event_execute_handlers(struct proc *p, struct intr_event *ie);
int intr_event_handle(struct intr_event *ie, struct trapframe *frame); int intr_event_handle(struct intr_event *ie, struct trapframe *frame);
int intr_event_remove_handler(void *cookie); int intr_event_remove_handler(void *cookie);
int intr_getaffinity(int irq, int mode, void *mask); int intr_getaffinity(int irq, int mode, void *mask);
void *intr_handler_source(void *cookie); void *intr_handler_source(void *cookie);
int intr_setaffinity(int irq, int mode, void *mask); int intr_setaffinity(int irq, int mode, void *mask);
void _intr_drain(int irq); /* Linux compat only. */ void _intr_drain(int irq); /* Linux compat only. */
int swi_add(struct intr_event **eventp, const char *name, int swi_add(struct intr_event **eventp, const char *name,
driver_intr_t handler, void *arg, int pri, enum intr_type flags, driver_intr_t handler, void *arg, int pri, enum intr_type flags,
void **cookiep); void **cookiep);
void swi_sched(void *cookie, int flags); void swi_sched(void *cookie, int flags);
int swi_remove(void *cookie); int swi_remove(void *cookie);
#endif #endif