1 /* $NetBSD: OsdSchedule.c,v 1.10 2009/03/31 17:17:47 drochner 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 1.10 2009/03/31 17:17:47 drochner 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 78 ACPI_FUNCTION_TRACE(__func__); 79 80 sysmon_task_queue_init(); 81 mutex_init(&acpi_osd_sleep_mtx, MUTEX_DEFAULT, IPL_NONE); 82 cv_init(&acpi_osd_sleep_cv, "acpislp"); 83 84 return_VOID; 85 } 86 87 /* 88 * acpi_osd_sched_fini: 89 * 90 * Clean up the ACPICA Osd scheduler. Called from AcpiOsdTerminate(). 91 */ 92 void 93 acpi_osd_sched_fini(void) 94 { 95 96 ACPI_FUNCTION_TRACE(__func__); 97 98 sysmon_task_queue_fini(); 99 100 return_VOID; 101 } 102 103 /* 104 * AcpiOsGetThreadId: 105 * 106 * Obtain the ID of the currently executing thread. 107 */ 108 ACPI_THREAD_ID 109 AcpiOsGetThreadId(void) 110 { 111 return (ACPI_THREAD_ID)curlwp; 112 } 113 114 /* 115 * AcpiOsQueueForExecution: 116 * 117 * Schedule a procedure for deferred execution. 118 */ 119 ACPI_STATUS 120 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 121 void *Context) 122 { 123 int pri; 124 125 ACPI_FUNCTION_TRACE(__func__); 126 127 switch (Type) { 128 case OSL_GPE_HANDLER: 129 pri = 10; 130 break; 131 case OSL_GLOBAL_LOCK_HANDLER: 132 case OSL_EC_POLL_HANDLER: 133 case OSL_EC_BURST_HANDLER: 134 pri = 5; 135 break; 136 case OSL_NOTIFY_HANDLER: 137 pri = 3; 138 break; 139 case OSL_DEBUGGER_THREAD: 140 pri = 0; 141 break; 142 default: 143 return_ACPI_STATUS(AE_BAD_PARAMETER); 144 } 145 146 switch (sysmon_task_queue_sched(pri, Function, Context)) { 147 case 0: 148 return_ACPI_STATUS(AE_OK); 149 150 case ENOMEM: 151 return_ACPI_STATUS(AE_NO_MEMORY); 152 153 default: 154 return_ACPI_STATUS(AE_BAD_PARAMETER); 155 } 156 } 157 158 /* 159 * AcpiOsSleep: 160 * 161 * Suspend the running task (coarse granularity). 162 */ 163 void 164 AcpiOsSleep(ACPI_INTEGER Milliseconds) 165 { 166 ACPI_FUNCTION_TRACE(__func__); 167 168 if (cold || doing_shutdown || acpi_suspended) 169 DELAY(Milliseconds * 1000); 170 else { 171 mutex_enter(&acpi_osd_sleep_mtx); 172 cv_timedwait_sig(&acpi_osd_sleep_cv, &acpi_osd_sleep_mtx, 173 MAX(mstohz(Milliseconds), 1)); 174 mutex_exit(&acpi_osd_sleep_mtx); 175 } 176 } 177 178 /* 179 * AcpiOsStall: 180 * 181 * Suspend the running task (fine granularity). 182 */ 183 void 184 AcpiOsStall(UINT32 Microseconds) 185 { 186 187 ACPI_FUNCTION_TRACE(__func__); 188 189 /* 190 * sleep(9) isn't safe because AcpiOsStall may be called 191 * with interrupt-disabled. (eg. by AcpiEnterSleepState) 192 * we should watch out for long stall requests. 193 */ 194 #ifdef ACPI_DEBUG 195 if (Microseconds > 1000) 196 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n", 197 Microseconds)); 198 #endif 199 200 delay(Microseconds); 201 202 return_VOID; 203 204 } 205 206 /* 207 * AcpiOsGetTimer: 208 * 209 * Get the current system time in 100 nanosecond units 210 */ 211 UINT64 212 AcpiOsGetTimer(void) 213 { 214 struct timeval tv; 215 UINT64 t; 216 217 /* XXX During early boot there is no (decent) timer available yet. */ 218 if (cold) 219 panic("acpi: timer op not yet supported during boot"); 220 221 microtime(&tv); 222 t = (UINT64)10 * tv.tv_usec; 223 t += (UINT64)10000000 * tv.tv_sec; 224 225 return (t); 226 } 227