#include <sys/cdefs.h>
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/cpuset.h>
#include <sys/rtprio.h>
#include <sys/systm.h>
#include <sys/interrupt.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/ktr.h>
#include <sys/limits.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.h>
#include <sys/priv.h>
#include <sys/proc.h>
#include <sys/random.h>
#include <sys/resourcevar.h>
#include <sys/sched.h>
#include <sys/smp.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/unistd.h>
#include <sys/vmmeter.h>
#include <machine/atomic.h>
#include <machine/cpu.h>
#include <machine/md_var.h>
#include <machine/stdarg.h>

Include dependency graph for kern_intr.c:

Data Structures
struct	intr_thread

struct	intr_entropy

Macros
#define	IT_DEAD 0x000001 /* Thread is waiting to exit. */

#define	IT_WAIT 0x000002 /* Thread is waiting for completion. */

Functions
	__FBSDID ("$BSDSUniX$")

static	MALLOC_DEFINE (M_ITHREAD,"ithread","Interrupt Threads")

	TUNABLE_INT ("hw.intr_storm_threshold",&intr_storm_threshold)

	SYSCTL_INT (_hw, OID_AUTO, intr_storm_threshold, CTLFLAG_RW,&intr_storm_threshold, 0,"Number of consecutive interrupts before storm protection is enabled")

static	TAILQ_HEAD (intr_event)

static void	ithread_update (struct intr_thread *ithd)

static void	intr_event_update (struct intr_event *ie)

int	intr_event_create (struct intr_event *event, void source, int flags, int irq, void(pre_ithread)(void ), void(post_ithread)(void ), void(post_filter)(void ), int(assign_cpu)(void , u_char), const char *fmt,...)

int	intr_event_bind (struct intr_event *ie, u_char cpu)

static struct intr_event *	intr_lookup (int irq)

int	intr_setaffinity (int irq, void *m)

int	intr_getaffinity (int irq, void *m)

int	intr_event_destroy (struct intr_event *ie)

static struct intr_thread *	ithread_create (const char *name)

static void	ithread_destroy (struct intr_thread *ithread)

int	intr_event_add_handler (struct intr_event ie, const char name, driver_filter_t filter, driver_intr_t handler, void arg, u_char pri, enum intr_type flags, void *cookiep)

int	intr_event_describe_handler (struct intr_event ie, void cookie, const char *descr)

void *	intr_handler_source (void *cookie)

void	_intr_drain (int irq)

int	intr_event_remove_handler (void *cookie)

static int	intr_event_schedule_thread (struct intr_event *ie)

static int	swi_assign_cpu (void *arg, u_char cpu)

int	swi_add (struct intr_event *eventp, const char name, driver_intr_t handler, void arg, int pri, enum intr_type flags, void *cookiep)

void	swi_sched (void *cookie, int flags)

int	swi_remove (void *cookie)

void	intr_event_execute_handlers (struct proc p, struct intr_event ie)

static void	ithread_execute_handlers (struct proc p, struct intr_event ie)

static void	ithread_loop (void *arg)

int	intr_event_handle (struct intr_event ie, struct trapframe frame)

static void	start_softintr (void *dummy)

	SYSINIT (start_softintr, SI_SUB_SOFTINTR, SI_ORDER_FIRST, start_softintr, NULL)

static int	sysctl_intrnames (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw, OID_AUTO, intrnames, CTLTYPE_OPAQUE\|CTLFLAG_RD, NULL, 0, sysctl_intrnames,"","Interrupt Names")

static int	sysctl_intrcnt (SYSCTL_HANDLER_ARGS)

	SYSCTL_PROC (_hw, OID_AUTO, intrcnt, CTLTYPE_OPAQUE\|CTLFLAG_RD, NULL, 0, sysctl_intrcnt,"","Interrupt Counts")

Variables
struct intr_event *	clk_intr_event

struct intr_event *	tty_intr_event

void *	vm_ih

struct proc *	intrproc

static int	intr_storm_threshold = 1000

Macro Definition Documentation

#define IT_DEAD 0x000001 /* Thread is waiting to exit. */

Definition at line 76 of file kern_intr.c.

Referenced by ithread_destroy(), and ithread_loop().

#define IT_WAIT 0x000002 /* Thread is waiting for completion. */

Definition at line 77 of file kern_intr.c.

Referenced by _intr_drain(), and ithread_loop().

Function Documentation

__FBSDID ( "$BSDSUniX$" )

void _intr_drain ( int irq )

Definition at line 752 of file kern_intr.c.

References intr_lookup(), intr_thread::it_flags, intr_thread::it_thread, IT_WAIT, and pause().

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int intr_event_add_handler	(	struct intr_event *	ie,
		const char *	name,
		driver_filter_t	filter,
		driver_intr_t	handler,
		void *	arg,
		u_char	pri,
		enum intr_type	flags,
		void **	cookiep
	)

Definition at line 512 of file kern_intr.c.

References free(), intr_event_update(), intr_thread::it_event, ithread_create(), ithread_update(), malloc(), and wakeup().

Referenced by swi_add().

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int intr_event_bind	(	struct intr_event *	ie,
		u_char	cpu
	)

Definition at line 296 of file kern_intr.c.

References cpuset_root, cpuset_setthread(), mask, and priv_check().

Referenced by intr_setaffinity().

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int intr_event_create	(	struct intr_event **	event,
		void *	source,
		int	flags,
		int	irq,
		void()(void )	pre_ithread,
		void()(void )	post_ithread,
		void()(void )	post_filter,
		int()(void , u_char)	assign_cpu,
		const char *	fmt,
			...
	)

Definition at line 251 of file kern_intr.c.

References malloc(), mtx_init(), and vsnprintf().

Referenced by swi_add().

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int intr_event_describe_handler	(	struct intr_event *	ie,
		void *	cookie,
		const char *	descr
	)

Definition at line 674 of file kern_intr.c.

References intr_event_update(), panic(), and start.

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int intr_event_destroy ( struct intr_event * ie )

Definition at line 420 of file kern_intr.c.

References free(), ithread_destroy(), and mtx_destroy().

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void intr_event_execute_handlers	(	struct proc *	p,
		struct intr_event *	ie
	)

Definition at line 1231 of file kern_intr.c.

References Giant, and wakeup().

Referenced by ithread_execute_handlers().

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int intr_event_handle	(	struct intr_event *	ie,
		struct trapframe *	frame
	)

Definition at line 1410 of file kern_intr.c.

References critical_enter(), critical_exit(), intr_event_schedule_thread(), and log().

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int intr_event_remove_handler ( void * cookie )

Definition at line 786 of file kern_intr.c.

References free(), intr_event_update(), ithread_destroy(), and panic().

Referenced by swi_remove().

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static int intr_event_schedule_thread ( struct intr_event * ie )

static

Definition at line 875 of file kern_intr.c.

References intr_entropy::event, intr_thread::it_need, intr_thread::it_thread, sched_add(), and intr_entropy::td.

Referenced by intr_event_handle(), and swi_sched().

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static void intr_event_update ( struct intr_event * ie )

static

Definition at line 195 of file kern_intr.c.

References ithread_update().

Referenced by intr_event_add_handler(), intr_event_describe_handler(), and intr_event_remove_handler().

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int intr_getaffinity	(	int	irq,
		void *	m
	)

Definition at line 400 of file kern_intr.c.

References cpuset_root, intr_lookup(), and mask.

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void* intr_handler_source ( void * cookie )

Definition at line 729 of file kern_intr.c.

static struct intr_event* intr_lookup ( int irq )

static

Definition at line 356 of file kern_intr.c.

Referenced by _intr_drain(), intr_getaffinity(), and intr_setaffinity().

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int intr_setaffinity	(	int	irq,
		void *	m
	)

Definition at line 371 of file kern_intr.c.

References cpuset_root, intr_event_bind(), intr_lookup(), and mask.

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static struct intr_thread* ithread_create ( const char * name )

static

Definition at line 446 of file kern_intr.c.

References intrproc, intr_thread::it_thread, ithread_loop(), kproc_kthread_add(), malloc(), panic(), and sched_class().

Referenced by intr_event_add_handler().

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static void ithread_destroy ( struct intr_thread * ithread )

static

Definition at line 495 of file kern_intr.c.

References IT_DEAD, intr_thread::it_event, intr_thread::it_flags, intr_thread::it_thread, and sched_add().

Referenced by intr_event_destroy(), and intr_event_remove_handler().

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static void ithread_execute_handlers	(	struct proc *	p,
		struct intr_event *	ie
	)

static

Definition at line 1279 of file kern_intr.c.

References intr_event_execute_handlers(), intr_storm_threshold, pause(), ppsratecheck(), and printf().

Referenced by ithread_loop().

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static void ithread_loop ( void * arg )

static

Definition at line 1324 of file kern_intr.c.

References free(), Giant, IT_DEAD, intr_thread::it_event, intr_thread::it_flags, intr_thread::it_need, intr_thread::it_thread, IT_WAIT, ithread_execute_handlers(), kthread_exit(), mi_switch(), and wakeup().

Referenced by ithread_create().

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static void ithread_update ( struct intr_thread * ithd )

static

Definition at line 166 of file kern_intr.c.

References intr_thread::it_event, intr_thread::it_thread, and sched_prio().

Referenced by intr_event_add_handler(), and intr_event_update().

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static MALLOC_DEFINE	(	M_ITHREAD	,
		"ithread"	,
		"Interrupt Threads"
	)

static

static void start_softintr ( void * dummy )

static

Definition at line 1877 of file kern_intr.c.

References panic(), swi_add(), and vm_ih.

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int swi_add	(	struct intr_event **	eventp,
		const char *	name,
		driver_intr_t	handler,
		void *	arg,
		int	pri,
		enum intr_type	flags,
		void **	cookiep
	)

Definition at line 1103 of file kern_intr.c.

References intr_event_add_handler(), intr_event_create(), and swi_assign_cpu().

Referenced by start_softclock(), and start_softintr().

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static int swi_assign_cpu	(	void *	arg,
		u_char	cpu
	)

static

Definition at line 1092 of file kern_intr.c.

Referenced by swi_add().

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int swi_remove ( void * cookie )

Definition at line 1187 of file kern_intr.c.

References intr_event_remove_handler().

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void swi_sched	(	void *	cookie,
		int	flags
	)

Definition at line 1143 of file kern_intr.c.

References intr_entropy::event, intr_event_schedule_thread(), and intr_entropy::td.

Referenced by callout_tick(), taskqueue_fast_enqueue(), taskqueue_swi_enqueue(), and taskqueue_swi_giant_enqueue().

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SYSCTL_INT	(	_hw	,
		OID_AUTO	,
		intr_storm_threshold	,
		CTLFLAG_RW	,
		&	intr_storm_threshold,
		0	,
		"Number of consecutive interrupts before storm protection is enabled"
	)