d983e760a7
Process switching during calling AcpiOsStall() caused fatal trap 12 at sleeping/wakeup on some machines.
158 lines
4.1 KiB
C
158 lines
4.1 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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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, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* 6.3 : Scheduling services
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*/
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#include "acpi.h"
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/taskqueue.h>
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#include <machine/clock.h>
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#define _COMPONENT ACPI_OS_SERVICES
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MODULE_NAME("SCHEDULE")
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/*
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* This is a little complicated due to the fact that we need to build and then
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* free a 'struct task' for each task we enqueue.
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*
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* We use the default taskqueue_swi queue, since it really doesn't matter what
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* else we're queued along with.
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*/
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MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
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static void AcpiOsExecuteQueue(void *arg, int pending);
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struct acpi_task {
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struct task at_task;
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OSD_EXECUTION_CALLBACK at_function;
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void *at_context;
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};
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ACPI_STATUS
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AcpiOsQueueForExecution(UINT32 Priority, OSD_EXECUTION_CALLBACK Function, void *Context)
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{
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struct acpi_task *at;
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FUNCTION_TRACE(__func__);
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if (Function == NULL)
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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at = malloc(sizeof(*at), M_ACPITASK, M_NOWAIT); /* Interrupt Context */
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if (at == NULL)
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return_ACPI_STATUS(AE_NO_MEMORY);
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bzero(at, sizeof(*at));
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at->at_function = Function;
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at->at_context = Context;
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at->at_task.ta_func = AcpiOsExecuteQueue;
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at->at_task.ta_context = at;
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switch (Priority) {
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case OSD_PRIORITY_GPE:
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at->at_task.ta_priority = 4;
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break;
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case OSD_PRIORITY_HIGH:
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at->at_task.ta_priority = 3;
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break;
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case OSD_PRIORITY_MED:
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at->at_task.ta_priority = 2;
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break;
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case OSD_PRIORITY_LO:
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at->at_task.ta_priority = 1;
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break;
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default:
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free(at, M_ACPITASK);
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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taskqueue_enqueue(taskqueue_swi, (struct task *)at);
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return_ACPI_STATUS(AE_OK);
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}
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static void
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AcpiOsExecuteQueue(void *arg, int pending)
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{
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struct acpi_task *at = (struct acpi_task *)arg;
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OSD_EXECUTION_CALLBACK Function;
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void *Context;
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FUNCTION_TRACE(__func__);
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Function = (OSD_EXECUTION_CALLBACK)at->at_function;
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Context = at->at_context;
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free(at, M_ACPITASK);
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Function(Context);
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return_VOID;
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}
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/*
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* We don't have any sleep granularity better than hz, so
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* make do with that.
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*/
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void
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AcpiOsSleep (UINT32 Seconds, UINT32 Milliseconds)
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{
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int timo;
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static int dummy;
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FUNCTION_TRACE(__func__);
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timo = (Seconds * hz) + Milliseconds * hz / 1000;
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if (timo == 0)
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timo = 1;
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tsleep(&dummy, 0, "acpislp", timo);
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return_VOID;
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}
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void
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AcpiOsStall (UINT32 Microseconds)
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{
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FUNCTION_TRACE(__func__);
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DELAY(Microseconds);
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return_VOID;
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}
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UINT32
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AcpiOsGetThreadId (void)
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{
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/* XXX do not add FUNCTION_TRACE here, results in recursive call */
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KASSERT(curproc != NULL, (__func__ ": curproc is NULL!"));
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return(curproc->p_pid + 1); /* can't return 0 */
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}
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