OsdSchedule.c revision 1.2 
1/*	$NetBSD: OsdSchedule.c,v 1.2 2007/12/09 20:27:54 jmcneill 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 1.2 2007/12/09 20:27:54 jmcneill 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
53#include <dev/acpi/acpica.h>
54
55#include <dev/acpi/acpi_osd.h>
56
57#include <dev/sysmon/sysmon_taskq.h>
58
59#define	_COMPONENT	ACPI_OS_SERVICES
60ACPI_MODULE_NAME("SCHEDULE")
61
62/*
63 * acpi_osd_sched_init:
64 *
65 *	Initialize the APCICA Osd scheduler.  Called from AcpiOsInitialize().
66 */
67void
68acpi_osd_sched_init(void)
69{
70
71	ACPI_FUNCTION_TRACE(__FUNCTION__);
72
73	sysmon_task_queue_init();
74
75	return_VOID;
76}
77
78/*
79 * acpi_osd_sched_fini:
80 *
81 *	Clean up the ACPICA Osd scheduler.  Called from AcpiOsdTerminate().
82 */
83void
84acpi_osd_sched_fini(void)
85{
86
87	ACPI_FUNCTION_TRACE(__FUNCTION__);
88
89	sysmon_task_queue_fini();
90
91	return_VOID;
92}
93
94/*
95 * AcpiOsGetThreadId:
96 *
97 *	Obtain the ID of the currently executing thread.
98 */
99ACPI_THREAD_ID
100AcpiOsGetThreadId(void)
101{
102
103	/* XXX ACPI CA can call this function in interrupt context */
104	if (curlwp == NULL)
105		return 1;
106
107	/* XXX Bleh, we're not allowed to return 0 (how stupid!) */
108	return (curlwp->l_proc->p_pid + 1);
109}
110
111/*
112 * AcpiOsQueueForExecution:
113 *
114 *	Schedule a procedure for deferred execution.
115 */
116ACPI_STATUS
117AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
118    void *Context)
119{
120	int pri;
121
122	ACPI_FUNCTION_TRACE(__FUNCTION__);
123
124	switch (Type) {
125	case OSL_GPE_HANDLER:
126		pri = 10;
127		break;
128	case OSL_GLOBAL_LOCK_HANDLER:
129	case OSL_EC_POLL_HANDLER:
130	case OSL_EC_BURST_HANDLER:
131		pri = 5;
132		break;
133	case OSL_NOTIFY_HANDLER:
134		pri = 3;
135		break;
136	case OSL_DEBUGGER_THREAD:
137		pri = 0;
138		break;
139	default:
140		return_ACPI_STATUS(AE_BAD_PARAMETER);
141	}
142
143	switch (sysmon_task_queue_sched(pri, Function, Context)) {
144	case 0:
145		return_ACPI_STATUS(AE_OK);
146
147	case ENOMEM:
148		return_ACPI_STATUS(AE_NO_MEMORY);
149
150	default:
151		return_ACPI_STATUS(AE_BAD_PARAMETER);
152	}
153}
154
155/*
156 * AcpiOsSleep:
157 *
158 *	Suspend the running task (coarse granularity).
159 */
160void
161AcpiOsSleep(ACPI_INTEGER Milliseconds)
162{
163	int timo;
164
165	ACPI_FUNCTION_TRACE(__FUNCTION__);
166
167	timo = Milliseconds * hz / 1000;
168	if (timo == 0)
169		timo = 1;
170
171	(void) tsleep(&timo, PVM, "acpislp", timo);
172
173	return_VOID;
174}
175
176/*
177 * AcpiOsStall:
178 *
179 *	Suspend the running task (fine granularity).
180 */
181void
182AcpiOsStall(UINT32 Microseconds)
183{
184
185	ACPI_FUNCTION_TRACE(__FUNCTION__);
186
187	/*
188	 * sleep(9) isn't safe because AcpiOsStall may be called
189	 * with interrupt-disabled. (eg. by AcpiEnterSleepState)
190	 * we should watch out for long stall requests.
191	 */
192#ifdef ACPI_DEBUG
193	if (Microseconds > 1000)
194		ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n",
195		    Microseconds));
196#endif
197
198	delay(Microseconds);
199
200	return_VOID;
201
202}
203
204/*
205 * AcpiOsStall:
206 *
207 *	Get the current system time in 100 nanosecond units
208 */
209UINT64
210AcpiOsGetTimer(void)
211{
212	struct timeval tv;
213	UINT64 t;
214
215	/* XXX During early boot there is no (decent) timer available yet. */
216	if (cold)
217		panic("acpi: timer op not yet supported during boot");
218
219	microtime(&tv);
220	t = (UINT64)10 * tv.tv_usec;
221	t += (UINT64)10000000 * tv.tv_sec;
222
223	return (t);
224}
225