1/*	$NetBSD: OsdSchedule.c,v 1.20 2021/12/31 14:22:26 riastradh 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 1.20 2021/12/31 14:22:26 riastradh 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	/*
105	 * If you raise any priority here make sure to adjust
106	 * AcpiOsWaitEventsComplete too.
107	 */
108	switch (Type) {
109	case OSL_GPE_HANDLER:
110		pri = 10;
111		break;
112	case OSL_GLOBAL_LOCK_HANDLER:
113	case OSL_EC_POLL_HANDLER:
114	case OSL_EC_BURST_HANDLER:
115		pri = 5;
116		break;
117	case OSL_NOTIFY_HANDLER:
118		pri = 3;
119		break;
120	default:
121		return AE_BAD_PARAMETER;
122	}
123
124	switch (sysmon_task_queue_sched(pri, Function, Context)) {
125	case 0:
126		return AE_OK;
127
128	case ENOMEM:
129		return AE_NO_MEMORY;
130
131	default:
132		return AE_BAD_PARAMETER;
133	}
134}
135
136/*
137 * AcpiOsSleep:
138 *
139 *	Suspend the running task (coarse granularity).
140 */
141void
142AcpiOsSleep(ACPI_INTEGER Milliseconds)
143{
144
145	if (cold || doing_shutdown || acpi_suspended)
146		DELAY(Milliseconds * 1000);
147	else {
148		mutex_enter(&acpi_osd_sleep_mtx);
149		cv_timedwait_sig(&acpi_osd_sleep_cv, &acpi_osd_sleep_mtx,
150		    MAX(mstohz(Milliseconds), 1));
151		mutex_exit(&acpi_osd_sleep_mtx);
152	}
153}
154
155/*
156 * AcpiOsStall:
157 *
158 *	Suspend the running task (fine granularity).
159 */
160void
161AcpiOsStall(UINT32 Microseconds)
162{
163
164	delay(Microseconds);
165}
166
167/*
168 * AcpiOsGetTimer:
169 *
170 *	Get the current system time in 100 nanosecond units
171 */
172UINT64
173AcpiOsGetTimer(void)
174{
175	static UINT64 xt;
176	struct timeval tv;
177	UINT64 t;
178
179	/* XXX During early boot there is no (decent) timer available yet. */
180	if (cold) {
181		return xt += 100;
182	}
183
184	microtime(&tv);
185	t = (UINT64)10 * tv.tv_usec;
186	t += (UINT64)10000000 * tv.tv_sec;
187
188	return t;
189}
190
191/*
192 * AcpiOsWaitEventsComplete:
193 *
194 * 	Wait for all asynchronous events to complete.
195 */
196void
197AcpiOsWaitEventsComplete(void)
198{
199	/* Highest priority used by AcpiOsExecute.  */
200	sysmon_task_queue_barrier(10);
201}
202