sys/dev/acpica5/Osd/OsdSchedule.c

   1 /*-
   2  * Copyright (c) 2000 Michael Smith
   3  * Copyright (c) 2000 BSDi
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  *
  27  * $FreeBSD: src/sys/dev/acpica/Osd/OsdSchedule.c,v 1.28 2004/05/06 02:18:58 njl Exp $
  28  * $DragonFly: src/sys/dev/acpica5/Osd/OsdSchedule.c,v 1.10 2008/06/05 18:06:31 swildner Exp $
  29  */
  30
  31 /*
  32  * 6.3 : Scheduling services
  33  */
  34
  35 #include "opt_acpi.h"
  36 #include <sys/param.h>
  37 #include <sys/systm.h>
  38 #include <sys/bus.h>
  39 #include <sys/interrupt.h>
  40 #include <sys/kernel.h>
  41 #include <sys/kthread.h>
  42 #include <sys/malloc.h>
  43 #include <sys/proc.h>
  44 #include <sys/msgport.h>
  45 #include <sys/taskqueue.h>
  46 #include <machine/clock.h>
  47
  48 #include <sys/thread2.h>
  49 #include <sys/msgport2.h>
  50
  51 #include "acpi.h"
  52 #include <dev/acpica5/acpivar.h>
  53
  54 #define _COMPONENT      ACPI_OS_SERVICES
  55 ACPI_MODULE_NAME("SCHEDULE")
  56
  57 /*
  58  * This is a little complicated due to the fact that we need to build and then
  59  * free a 'struct task' for each task we enqueue.
  60  */
  61
  62 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
  63
  64 static void     acpi_task_thread(void *arg);
  65 static void     acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg);
  66
  67 struct acpi_task {
  68     struct lwkt_msg             at_msg;
  69     ACPI_OSD_EXEC_CALLBACK      at_function;
  70     void                        *at_context;
  71     ACPI_EXECUTE_TYPE           at_type;
  72 };
  73
  74 static struct thread *acpi_task_td;
  75 struct lwkt_port acpi_afree_rport;
  76
  77 /*
  78  * Initialize the ACPI helper thread.
  79  */
  80 int
  81 acpi_task_thread_init(void)
  82 {
  83     lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply);
  84     kthread_create(acpi_task_thread, NULL, &acpi_task_td,
  85                         0, 0, "acpi_task");
  86     return (0);
  87 }
  88
  89 /*
  90  * The ACPI helper thread processes OSD execution callback messages.
  91  */
  92 static void
  93 acpi_task_thread(void *arg)
  94 {
  95     ACPI_OSD_EXEC_CALLBACK func;
  96     struct acpi_task *at;
  97
  98     for (;;) {
  99         at = (void *)lwkt_waitport(&curthread->td_msgport, 0);
 100         func = (ACPI_OSD_EXEC_CALLBACK)at->at_function;
 101         func((void *)at->at_context);
 102         lwkt_replymsg(&at->at_msg, 0);
 103     }
 104     kthread_exit();
 105 }
 106
 107 /*
 108  * Queue an ACPI message for execution by allocating a LWKT message structure
 109  * and sending the message to the helper thread.  The reply port is setup
 110  * to automatically free the message.
 111  */
 112 ACPI_STATUS
 113 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
 114               void *Context)
 115 {
 116     struct acpi_task    *at;
 117
 118     switch (Type) {
 119     case OSL_GLOBAL_LOCK_HANDLER:
 120     case OSL_NOTIFY_HANDLER:
 121     case OSL_GPE_HANDLER:
 122     case OSL_DEBUGGER_THREAD:
 123     case OSL_EC_POLL_HANDLER:
 124     case OSL_EC_BURST_HANDLER:
 125         break;
 126     default:
 127         return_ACPI_STATUS (AE_BAD_PARAMETER);
 128     }
 129
 130     /* Note: Interrupt Context */
 131     at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO);
 132     lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0);
 133     at->at_function = Function;
 134     at->at_context = Context;
 135     at->at_type = Type;
 136     lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg);
 137     return_ACPI_STATUS (AE_OK);
 138 }
 139
 140 /*
 141  * The message's reply port just frees the message.
 142  */
 143 static void
 144 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg)
 145 {
 146     kfree(msg, M_ACPITASK);
 147 }
 148
 149 UINT64
 150 AcpiOsGetTimer (void)
 151 {
 152     struct timeval  time;
 153
 154     microtime(&time);
 155
 156     /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */
 157
 158     return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10));
 159 }
 160
 161 void
 162 AcpiOsSleep(ACPI_INTEGER Milliseconds)
 163 {
 164     int         timo;
 165     static int  dummy;
 166
 167     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 168
 169     timo = Milliseconds * hz / 1000;
 170
 171     /*
 172      * If requested sleep time is less than our hz resolution, or if
 173      * the system is in early boot before the system tick is operational,
 174      * use DELAY instead for better granularity.
 175      */
 176     if (clocks_running == 0) {
 177         while (timo > 1000000) {
 178             DELAY(1000000);
 179             timo -= 1000000;
 180         }
 181         if (timo)
 182             DELAY(timo * 1000);
 183     } else if (timo > 1000) {
 184         tsleep(&dummy, 0, "acpislp", timo);
 185     } else {
 186         DELAY(Milliseconds * 1000);
 187     }
 188     return_VOID;
 189 }
 190
 191 void
 192 AcpiOsStall(UINT32 Microseconds)
 193 {
 194     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 195
 196     DELAY(Microseconds);
 197     return_VOID;
 198 }
 199
 200 ACPI_THREAD_ID
 201 AcpiOsGetThreadId(void)
 202 {
 203     struct proc *p;
 204
 205     /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
 206
 207     p = curproc;
 208     if (p == NULL)
 209         p = &proc0;
 210     KASSERT(p != NULL, ("%s: curproc is NULL!", __func__));
 211
 212     /* Returning 0 is not allowed. */
 213     return (p->p_pid + 1);
 214 }