fe486a370a
now it just calls intr_event_remove_handler(), but at some point it might also be responsible for tearing down interrupt events created via swi_add.
131 lines
4.7 KiB
C
131 lines
4.7 KiB
C
/*-
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* Copyright (c) 1997, Stefan Esser <se@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS_INTERRUPT_H_
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#define _SYS_INTERRUPT_H_
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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struct intr_event;
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struct intr_thread;
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/*
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* Describe a hardware interrupt handler.
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*
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* Multiple interrupt handlers for a specific event can be chained
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* together.
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*/
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struct intr_handler {
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driver_intr_t *ih_handler; /* Handler function. */
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void *ih_argument; /* Argument to pass to handler. */
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int ih_flags;
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const char *ih_name; /* Name of handler. */
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struct intr_event *ih_event; /* Event we are connected to. */
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int ih_need; /* Needs service. */
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TAILQ_ENTRY(intr_handler) ih_next; /* Next handler for this event. */
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u_char ih_pri; /* Priority of this handler. */
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};
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/* Interrupt handle flags kept in ih_flags */
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#define IH_FAST 0x00000001 /* Fast interrupt. */
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#define IH_EXCLUSIVE 0x00000002 /* Exclusive interrupt. */
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#define IH_ENTROPY 0x00000004 /* Device is a good entropy source. */
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#define IH_DEAD 0x00000008 /* Handler should be removed. */
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#define IH_MPSAFE 0x80000000 /* Handler does not need Giant. */
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/*
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* Describe an interrupt event. An event holds a list of handlers.
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*/
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struct intr_event {
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TAILQ_ENTRY(intr_event) ie_list;
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TAILQ_HEAD(, intr_handler) ie_handlers; /* Interrupt handlers. */
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char ie_name[MAXCOMLEN]; /* Individual event name. */
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char ie_fullname[MAXCOMLEN];
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struct mtx ie_lock;
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void *ie_source; /* Cookie used by MD code. */
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struct intr_thread *ie_thread; /* Thread we are connected to. */
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void (*ie_enable)(void *);
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int ie_flags;
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int ie_count; /* Loop counter. */
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int ie_warned; /* Warned about interrupt storm. */
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};
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/* Interrupt event flags kept in ie_flags. */
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#define IE_SOFT 0x000001 /* Software interrupt. */
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#define IE_ENTROPY 0x000002 /* Interrupt is an entropy source. */
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#define IE_ADDING_THREAD 0x000004 /* Currently building an ithread. */
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/* Flags to pass to sched_swi. */
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#define SWI_DELAY 0x2
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/*
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* Software interrupt numbers in priority order. The priority determines
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* the priority of the corresponding interrupt thread.
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*/
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#define SWI_TTY 0
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#define SWI_NET 1
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#define SWI_CAMBIO 2
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#define SWI_VM 3
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#define SWI_CLOCK 4
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#define SWI_TQ_FAST 5
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#define SWI_TQ 6
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#define SWI_TQ_GIANT 6
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extern struct intr_event *tty_intr_event;
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extern struct intr_event *clk_intr_event;
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extern void *softclock_ih;
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extern void *vm_ih;
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/* Counts and names for statistics (defined in MD code). */
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extern u_long eintrcnt[]; /* end of intrcnt[] */
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extern char eintrnames[]; /* end of intrnames[] */
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extern u_long intrcnt[]; /* counts for for each device and stray */
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extern char intrnames[]; /* string table containing device names */
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#ifdef DDB
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void db_dump_intr_event(struct intr_event *ie, int handlers);
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#endif
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u_char intr_priority(enum intr_type flags);
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int intr_event_add_handler(struct intr_event *ie, const char *name,
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driver_intr_t handler, void *arg, u_char pri, enum intr_type flags,
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void **cookiep);
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int intr_event_create(struct intr_event **event, void *source,
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int flags, void (*enable)(void *), const char *fmt, ...)
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__printflike(5, 6);
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int intr_event_destroy(struct intr_event *ie);
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int intr_event_remove_handler(void *cookie);
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int intr_event_schedule_thread(struct intr_event *ie);
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int swi_add(struct intr_event **eventp, const char *name,
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driver_intr_t handler, void *arg, int pri, enum intr_type flags,
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void **cookiep);
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void swi_sched(void *cookie, int flags);
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int swi_remove(void *cookie);
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#endif
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