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 * Multithreading and 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/msgport.h> 43 #include <sys/taskqueue.h> 44 #include <machine/clock.h> 45 46 #include <sys/thread2.h> 47 #include <sys/msgport2.h> 48 49 #include "acpi.h" 50 #include "accommon.h" 51 #include <dev/acpica/acpivar.h> 52 53 #define _COMPONENT ACPI_OS_SERVICES 54 ACPI_MODULE_NAME("SCHEDULE") 55 56 /* 57 * This is a little complicated due to the fact that we need to build and then 58 * free a 'struct task' for each task we enqueue. 59 */ 60 61 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task"); 62 63 static void acpi_task_thread(void *arg); 64 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg); 65 66 struct acpi_task { 67 struct lwkt_msg at_msg; 68 ACPI_OSD_EXEC_CALLBACK at_function; 69 void *at_context; 70 ACPI_EXECUTE_TYPE at_type; 71 }; 72 73 static struct thread *acpi_task_td; 74 struct lwkt_port acpi_afree_rport; 75 76 /* 77 * Initialize the ACPI helper thread. 78 */ 79 int 80 acpi_task_thread_init(void) 81 { 82 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply); 83 acpi_task_td = kmalloc(sizeof(struct thread), M_DEVBUF, M_INTWAIT | M_ZERO); 84 lwkt_create(acpi_task_thread, NULL, NULL, acpi_task_td, TDF_NOSTART, 0, 85 "acpi_task"); 86 return (0); 87 } 88 89 void 90 acpi_task_thread_schedule(void) 91 { 92 lwkt_schedule(acpi_task_td); 93 } 94 95 /* 96 * The ACPI helper thread processes OSD execution callback messages. 97 */ 98 static void 99 acpi_task_thread(void *arg) 100 { 101 ACPI_OSD_EXEC_CALLBACK func; 102 struct acpi_task *at; 103 104 lwkt_gettoken(&acpi_token); 105 for (;;) { 106 at = (void *)lwkt_waitport(&curthread->td_msgport, 0); 107 func = at->at_function; 108 func(at->at_context); 109 lwkt_replymsg(&at->at_msg, 0); 110 } 111 lwkt_reltoken(&acpi_token); 112 } 113 114 /* 115 * Queue an ACPI message for execution by allocating a LWKT message structure 116 * and sending the message to the helper thread. The reply port is setup 117 * to automatically free the message. 118 */ 119 ACPI_STATUS 120 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 121 void *Context) 122 { 123 struct acpi_task *at; 124 125 switch (Type) { 126 case OSL_GLOBAL_LOCK_HANDLER: 127 case OSL_NOTIFY_HANDLER: 128 case OSL_GPE_HANDLER: 129 case OSL_DEBUGGER_EXEC_THREAD: 130 case OSL_EC_POLL_HANDLER: 131 case OSL_EC_BURST_HANDLER: 132 break; 133 default: 134 return_ACPI_STATUS (AE_BAD_PARAMETER); 135 } 136 137 /* Note: Interrupt Context */ 138 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO); 139 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0); 140 at->at_function = Function; 141 at->at_context = Context; 142 at->at_type = Type; 143 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg); 144 return_ACPI_STATUS (AE_OK); 145 } 146 147 /* 148 * The message's reply port just frees the message. 149 */ 150 static void 151 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 152 { 153 kfree(msg, M_ACPITASK); 154 } 155 156 UINT64 157 AcpiOsGetTimer (void) 158 { 159 struct timeval time; 160 161 microtime(&time); 162 163 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */ 164 165 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10)); 166 } 167 168 void 169 AcpiOsSleep(UINT64 Milliseconds) 170 { 171 int timo; 172 static int dummy; 173 174 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 175 176 timo = Milliseconds * hz / 1000; 177 178 /* 179 * If requested sleep time is less than our hz resolution, or if 180 * the system is in early boot before the system tick is operational, 181 * use DELAY instead for better granularity. 182 */ 183 if (clocks_running == 0) { 184 while (timo > 1000000) { 185 DELAY(1000000); 186 timo -= 1000000; 187 } 188 if (timo) 189 DELAY(timo * 1000); 190 } else if (timo > 0) { 191 tsleep(&dummy, 0, "acpislp", timo); 192 } else { 193 DELAY(Milliseconds * 1000); 194 } 195 return_VOID; 196 } 197 198 void 199 AcpiOsStall(UINT32 Microseconds) 200 { 201 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 202 203 DELAY(Microseconds); 204 return_VOID; 205 } 206 207 ACPI_THREAD_ID 208 AcpiOsGetThreadId(void) 209 { 210 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */ 211 212 return ((uintptr_t)curthread); 213 } 214