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 | |
61 | extern int acpi_suspended; |
62 | |
63 | #define _COMPONENT ACPI_OS_SERVICES |
64 | ACPI_MODULE_NAME("SCHEDULE" ) |
65 | |
66 | static kcondvar_t acpi_osd_sleep_cv; |
67 | static kmutex_t acpi_osd_sleep_mtx; |
68 | |
69 | /* |
70 | * acpi_osd_sched_init: |
71 | * |
72 | * Initialize the APCICA Osd scheduler. Called from AcpiOsInitialize(). |
73 | */ |
74 | void |
75 | acpi_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 | */ |
87 | ACPI_THREAD_ID |
88 | AcpiOsGetThreadId(void) |
89 | { |
90 | return (ACPI_THREAD_ID)(uintptr_t)curlwp; |
91 | } |
92 | |
93 | /* |
94 | * AcpiOsQueueForExecution: |
95 | * |
96 | * Schedule a procedure for deferred execution. |
97 | */ |
98 | ACPI_STATUS |
99 | AcpiOsExecute(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 | */ |
137 | void |
138 | AcpiOsSleep(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 | */ |
156 | void |
157 | AcpiOsStall(UINT32 Microseconds) |
158 | { |
159 | |
160 | delay(Microseconds); |
161 | } |
162 | |
163 | /* |
164 | * AcpiOsGetTimer: |
165 | * |
166 | * Get the current system time in 100 nanosecond units |
167 | */ |
168 | UINT64 |
169 | AcpiOsGetTimer(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 | */ |
192 | void |
193 | AcpiOsWaitEventsComplete(void) |
194 | { |
195 | return; |
196 | } |
197 | |