a96255b62d
triggers a KASSERT) or local variables. In the case of kern_ndis, the tsleep() actually used a common sleep address (curproc) making it susceptible to a premature wakeup.
194 lines
4.9 KiB
C
194 lines
4.9 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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/*
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* 6.3 : Scheduling services
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/interrupt.h>
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#include <sys/kernel.h>
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#include <sys/kthread.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 <contrib/dev/acpica/acpi.h>
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#include <dev/acpica/acpivar.h>
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#define _COMPONENT ACPI_OS_SERVICES
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ACPI_MODULE_NAME("SCHEDULE")
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/*
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* Allow the user to tune the number of task threads we start. It seems
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* some systems have problems with increased parallelism.
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*/
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static int acpi_max_threads = ACPI_MAX_THREADS;
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TUNABLE_INT("debug.acpi.max_threads", &acpi_max_threads);
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MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
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struct acpi_task_ctx {
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struct task at_task;
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ACPI_OSD_EXEC_CALLBACK at_function;
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void *at_context;
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};
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TASKQUEUE_DEFINE(acpi, taskqueue_thread_enqueue, &taskqueue_acpi,
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taskqueue_start_threads(&taskqueue_acpi, acpi_max_threads, PWAIT,
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"acpi_task"));
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/*
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* Bounce through this wrapper function since ACPI-CA doesn't understand
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* the pending argument for its callbacks.
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*/
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static void
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acpi_task_execute(void *context, int pending)
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{
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struct acpi_task_ctx *at;
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at = (struct acpi_task_ctx *)context;
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at->at_function(at->at_context);
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free(at, M_ACPITASK);
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}
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/*
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* This function may be called in interrupt context, i.e. when a GPE fires.
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* We allocate and queue a task for one of our taskqueue threads to process.
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*/
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ACPI_STATUS
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AcpiOsQueueForExecution(UINT32 Priority, ACPI_OSD_EXEC_CALLBACK Function,
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void *Context)
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{
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struct acpi_task_ctx *at;
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int pri;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__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);
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if (at == NULL)
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return_ACPI_STATUS (AE_NO_MEMORY);
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at->at_function = Function;
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at->at_context = Context;
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switch (Priority) {
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case OSD_PRIORITY_GPE:
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pri = 4;
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break;
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case OSD_PRIORITY_HIGH:
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pri = 3;
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break;
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case OSD_PRIORITY_MED:
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pri = 2;
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break;
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case OSD_PRIORITY_LO:
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pri = 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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TASK_INIT(&at->at_task, pri, acpi_task_execute, at);
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taskqueue_enqueue(taskqueue_acpi, &at->at_task);
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return_ACPI_STATUS (AE_OK);
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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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int timo;
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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timo = Milliseconds * hz / 1000;
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/*
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* If requested sleep time is less than our hz resolution, use
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* DELAY instead for better granularity.
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*/
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if (timo > 0)
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pause("acpislp", timo);
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else
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DELAY(Milliseconds * 1000);
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return_VOID;
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}
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/*
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* Return the current 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 bintime bt;
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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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binuptime(&bt);
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t = ((UINT64)10000000 * (uint32_t)(bt.frac >> 32)) >> 32;
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t += bt.sec * 10000000;
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return (t);
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}
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void
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AcpiOsStall(UINT32 Microseconds)
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{
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ACPI_FUNCTION_TRACE((char *)(uintptr_t)__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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struct proc *p;
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/* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
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p = curproc;
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KASSERT(p != NULL, ("%s: curproc is NULL!", __func__));
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/* Returning 0 is not allowed. */
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return (p->p_pid + 1);
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}
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