1/* $NetBSD: OsdSchedule.c,v 1.18 2016/01/09 21:14:42 christos Exp $ */
2
3/*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * OS Services Layer
40 *
41 * 6.3: Scheduling services
42 */
43
44#include <sys/cdefs.h>
45__KERNEL_RCSID(0, "$NetBSD: OsdSchedule.c,v 1.18 2016/01/09 21:14:42 christos Exp $");
46
47#include <sys/param.h>
48#include <sys/malloc.h>
49#include <sys/proc.h>
50#include <sys/systm.h>
51#include <sys/kernel.h>
52#include <sys/condvar.h>
53#include <sys/mutex.h>
54
55#include <dev/acpi/acpica.h>
56
57#include <dev/acpi/acpi_osd.h>
58
59#include <dev/sysmon/sysmon_taskq.h>
60
61extern int acpi_suspended;
62
63#define _COMPONENT ACPI_OS_SERVICES
64ACPI_MODULE_NAME("SCHEDULE")
65
66static kcondvar_t acpi_osd_sleep_cv;
67static kmutex_t acpi_osd_sleep_mtx;
68
69/*
70 * acpi_osd_sched_init:
71 *
72 * Initialize the APCICA Osd scheduler. Called from AcpiOsInitialize().
73 */
74void
75acpi_osd_sched_init(void)
76{
77 sysmon_task_queue_init();
78 mutex_init(&acpi_osd_sleep_mtx, MUTEX_DEFAULT, IPL_NONE);
79 cv_init(&acpi_osd_sleep_cv, "acpislp");
80}
81
82/*
83 * AcpiOsGetThreadId:
84 *
85 * Obtain the ID of the currently executing thread.
86 */
87ACPI_THREAD_ID
88AcpiOsGetThreadId(void)
89{
90 return (ACPI_THREAD_ID)(uintptr_t)curlwp;
91}
92
93/*
94 * AcpiOsQueueForExecution:
95 *
96 * Schedule a procedure for deferred execution.
97 */
98ACPI_STATUS
99AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
100 void *Context)
101{
102 int pri;
103
104 switch (Type) {
105 case OSL_GPE_HANDLER:
106 pri = 10;
107 break;
108 case OSL_GLOBAL_LOCK_HANDLER:
109 case OSL_EC_POLL_HANDLER:
110 case OSL_EC_BURST_HANDLER:
111 pri = 5;
112 break;
113 case OSL_NOTIFY_HANDLER:
114 pri = 3;
115 break;
116 default:
117 return AE_BAD_PARAMETER;
118 }
119
120 switch (sysmon_task_queue_sched(pri, Function, Context)) {
121 case 0:
122 return AE_OK;
123
124 case ENOMEM:
125 return AE_NO_MEMORY;
126
127 default:
128 return AE_BAD_PARAMETER;
129 }
130}
131
132/*
133 * AcpiOsSleep:
134 *
135 * Suspend the running task (coarse granularity).
136 */
137void
138AcpiOsSleep(ACPI_INTEGER Milliseconds)
139{
140
141 if (cold || doing_shutdown || acpi_suspended)
142 DELAY(Milliseconds * 1000);
143 else {
144 mutex_enter(&acpi_osd_sleep_mtx);
145 cv_timedwait_sig(&acpi_osd_sleep_cv, &acpi_osd_sleep_mtx,
146 MAX(mstohz(Milliseconds), 1));
147 mutex_exit(&acpi_osd_sleep_mtx);
148 }
149}
150
151/*
152 * AcpiOsStall:
153 *
154 * Suspend the running task (fine granularity).
155 */
156void
157AcpiOsStall(UINT32 Microseconds)
158{
159
160 delay(Microseconds);
161}
162
163/*
164 * AcpiOsGetTimer:
165 *
166 * Get the current system time in 100 nanosecond units
167 */
168UINT64
169AcpiOsGetTimer(void)
170{
171 struct timeval tv;
172 UINT64 t;
173
174 /* XXX During early boot there is no (decent) timer available yet. */
175 if (cold)
176 panic("acpi: timer op not yet supported during boot");
177
178 microtime(&tv);
179 t = (UINT64)10 * tv.tv_usec;
180 t += (UINT64)10000000 * tv.tv_sec;
181
182 return t;
183}
184
185/*
186 *
187 * AcpiOsWaitEventsComplete:
188 *
189 * Wait for all asynchronous events to complete. This implementation
190 * does nothing.
191 */
192void
193AcpiOsWaitEventsComplete(void)
194{
195 return;
196}
197