1 /* $NetBSD: OsdSchedule.c,v 1.19 2017/11/12 02:59:55 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 1.19 2017/11/12 02:59:55 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 static UINT64 xt; 172 struct timeval tv; 173 UINT64 t; 174 175 /* XXX During early boot there is no (decent) timer available yet. */ 176 if (cold) { 177 return xt += 100; 178 } 179 180 microtime(&tv); 181 t = (UINT64)10 * tv.tv_usec; 182 t += (UINT64)10000000 * tv.tv_sec; 183 184 return t; 185 } 186 187 /* 188 * 189 * AcpiOsWaitEventsComplete: 190 * 191 * Wait for all asynchronous events to complete. This implementation 192 * does nothing. 193 */ 194 void 195 AcpiOsWaitEventsComplete(void) 196 { 197 return; 198 } 199