2731b5ff2f
seconds. It is known that there are systems in the field that pass bogus AML
values to the Sleep() operation code, possibly requesting delays that could
be measured in days.
Discussed with jmcneill@.
XXX: While the used mstohz(9) is documented to round to one second if the
passed value is larger than 131072 ms, we may still need to force a
sensible upper limit if this warning starts to appear.
203 lines
4.8 KiB
C
203 lines
4.8 KiB
C
/* $NetBSD: OsdSchedule.c,v 1.13 2010/05/12 17:03:11 jruoho Exp $ */
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/*
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* Copyright 2001 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Jason R. Thorpe for Wasabi Systems, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* OS Services Layer
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*
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* 6.3: Scheduling services
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: OsdSchedule.c,v 1.13 2010/05/12 17:03:11 jruoho Exp $");
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#include <sys/param.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/condvar.h>
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#include <sys/mutex.h>
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#include <dev/acpi/acpica.h>
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#include <dev/acpi/acpi_osd.h>
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#include <dev/sysmon/sysmon_taskq.h>
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extern int acpi_suspended;
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("SCHEDULE")
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static kcondvar_t acpi_osd_sleep_cv;
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static kmutex_t acpi_osd_sleep_mtx;
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/*
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* acpi_osd_sched_init:
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*
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* Initialize the APCICA Osd scheduler. Called from AcpiOsInitialize().
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*/
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void
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acpi_osd_sched_init(void)
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{
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sysmon_task_queue_init();
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mutex_init(&acpi_osd_sleep_mtx, MUTEX_DEFAULT, IPL_NONE);
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cv_init(&acpi_osd_sleep_cv, "acpislp");
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}
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/*
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* AcpiOsGetThreadId:
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*
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* Obtain the ID of the currently executing thread.
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*/
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ACPI_THREAD_ID
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AcpiOsGetThreadId(void)
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{
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return (ACPI_THREAD_ID)curlwp;
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}
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/*
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* AcpiOsQueueForExecution:
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*
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* Schedule a procedure for deferred execution.
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*/
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ACPI_STATUS
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AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
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void *Context)
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{
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int pri;
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switch (Type) {
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case OSL_GPE_HANDLER:
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pri = 10;
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break;
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case OSL_GLOBAL_LOCK_HANDLER:
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case OSL_EC_POLL_HANDLER:
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case OSL_EC_BURST_HANDLER:
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pri = 5;
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break;
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case OSL_NOTIFY_HANDLER:
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pri = 3;
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break;
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case OSL_DEBUGGER_THREAD:
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pri = 0;
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break;
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default:
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return AE_BAD_PARAMETER;
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}
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switch (sysmon_task_queue_sched(pri, Function, Context)) {
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case 0:
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return AE_OK;
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case ENOMEM:
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return AE_NO_MEMORY;
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default:
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return AE_BAD_PARAMETER;
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}
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}
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/*
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* AcpiOsSleep:
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*
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* Suspend the running task (coarse granularity).
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*/
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void
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AcpiOsSleep(ACPI_INTEGER Milliseconds)
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{
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static bool once = false;
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if (Milliseconds > 2000 && once != true) {
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aprint_error("acpi0: WARNING: long Sleep()\n");
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once = true;
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}
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if (cold || doing_shutdown || acpi_suspended)
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DELAY(Milliseconds * 1000);
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else {
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mutex_enter(&acpi_osd_sleep_mtx);
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cv_timedwait_sig(&acpi_osd_sleep_cv, &acpi_osd_sleep_mtx,
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MAX(mstohz(Milliseconds), 1));
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mutex_exit(&acpi_osd_sleep_mtx);
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}
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}
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/*
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* AcpiOsStall:
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*
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* Suspend the running task (fine granularity).
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*/
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void
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AcpiOsStall(UINT32 Microseconds)
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{
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/*
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* sleep(9) isn't safe because AcpiOsStall may be called
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* with interrupt-disabled. (eg. by AcpiEnterSleepState)
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* we should watch out for long stall requests.
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*/
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#ifdef ACPI_DEBUG
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if (Microseconds > 1000)
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n",
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Microseconds));
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#endif
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delay(Microseconds);
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}
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/*
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* AcpiOsGetTimer:
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*
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* Get the current system time in 100 nanosecond units
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*/
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UINT64
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AcpiOsGetTimer(void)
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{
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struct timeval tv;
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UINT64 t;
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/* XXX During early boot there is no (decent) timer available yet. */
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if (cold)
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panic("acpi: timer op not yet supported during boot");
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microtime(&tv);
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t = (UINT64)10 * tv.tv_usec;
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t += (UINT64)10000000 * tv.tv_sec;
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return t;
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}
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