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 */
29
30 /*
31 * 6.3 : Scheduling services
32 */
33
34 #include "opt_acpi.h"
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/bus.h>
38 #include <sys/interrupt.h>
39 #include <sys/kernel.h>
40 #include <sys/kthread.h>
41 #include <sys/malloc.h>
42 #include <sys/proc.h>
43 #include <sys/msgport.h>
44 #include <sys/taskqueue.h>
45 #include <machine/clock.h>
46
47 #include <sys/thread2.h>
48 #include <sys/msgport2.h>
49 #include <sys/mplock2.h>
50
51 #include "acpi.h"
52 #include "accommon.h"
53 #include <dev/acpica/acpivar.h>
54
55 #define _COMPONENT ACPI_OS_SERVICES
56 ACPI_MODULE_NAME("SCHEDULE")
57
58 /*
59 * This is a little complicated due to the fact that we need to build and then
60 * free a 'struct task' for each task we enqueue.
61 */
62
63 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task");
64
65 static void acpi_task_thread(void *arg);
66 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg);
67
68 struct acpi_task {
69 struct lwkt_msg at_msg;
70 ACPI_OSD_EXEC_CALLBACK at_function;
71 void *at_context;
72 ACPI_EXECUTE_TYPE at_type;
73 };
74
75 static struct thread *acpi_task_td;
76 struct lwkt_port acpi_afree_rport;
77
78 /*
79 * Initialize the ACPI helper thread.
80 */
81 int
82 acpi_task_thread_init(void)
83 {
84 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply);
85 kthread_create(acpi_task_thread, NULL, &acpi_task_td, "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 get_mplock();
99 for (;;) {
100 at = (void *)lwkt_waitport(&curthread->td_msgport, 0);
101 func = at->at_function;
102 func(at->at_context);
103 lwkt_replymsg(&at->at_msg, 0);
104 }
105 rel_mplock();
106 }
107
108 /*
109 * Queue an ACPI message for execution by allocating a LWKT message structure
110 * and sending the message to the helper thread. The reply port is setup
111 * to automatically free the message.
112 */
113 ACPI_STATUS
114 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function,
115 void *Context)
116 {
117 struct acpi_task *at;
118
119 switch (Type) {
120 case OSL_GLOBAL_LOCK_HANDLER:
121 case OSL_NOTIFY_HANDLER:
122 case OSL_GPE_HANDLER:
123 case OSL_DEBUGGER_THREAD:
124 case OSL_EC_POLL_HANDLER:
125 case OSL_EC_BURST_HANDLER:
126 break;
127 default:
128 return_ACPI_STATUS (AE_BAD_PARAMETER);
129 }
130
131 /* Note: Interrupt Context */
132 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO);
133 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0);
134 at->at_function = Function;
135 at->at_context = Context;
136 at->at_type = Type;
137 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg);
138 return_ACPI_STATUS (AE_OK);
139 }
140
141 /*
142 * The message's reply port just frees the message.
143 */
144 static void
145 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg)
146 {
147 kfree(msg, M_ACPITASK);
148 }
149
150 UINT64
151 AcpiOsGetTimer (void)
152 {
153 struct timeval time;
154
155 microtime(&time);
156
157 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */
158
159 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10));
160 }
161
162 void
163 AcpiOsSleep(ACPI_INTEGER Milliseconds)
164 {
165 int timo;
166 static int dummy;
167
168 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
169
170 timo = Milliseconds * hz / 1000;
171
172 /*
173 * If requested sleep time is less than our hz resolution, or if
174 * the system is in early boot before the system tick is operational,
175 * use DELAY instead for better granularity.
176 */
177 if (clocks_running == 0) {
178 while (timo > 1000000) {
179 DELAY(1000000);
180 timo -= 1000000;
181 }
182 if (timo)
183 DELAY(timo * 1000);
184 } else if (timo > 0) {
185 tsleep(&dummy, 0, "acpislp", timo);
186 } else {
187 DELAY(Milliseconds * 1000);
188 }
189 return_VOID;
190 }
191
192 void
193 AcpiOsStall(UINT32 Microseconds)
194 {
195 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
196
197 DELAY(Microseconds);
198 return_VOID;
199 }
200
201 ACPI_THREAD_ID
202 AcpiOsGetThreadId(void)
203 {
204 struct proc *p;
205
206 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */
207
208 p = curproc;
209 if (p == NULL)
210 p = &proc0;
211 KASSERT(p != NULL, ("%s: curproc is NULL!", __func__));
212
213 /* Returning 0 is not allowed. */
214 return (p->p_pid + 1);
215 }
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