| 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 | |