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 * $FreeBSD$ 28 */ 29 30 /* 31 * 6.3 : Scheduling services 32 */ 33 34 #include "acpi.h" 35 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/proc.h> 39 #include <sys/taskqueue.h> 40 #include <machine/clock.h> 41 42 #define _COMPONENT ACPI_OS_SERVICES 43 MODULE_NAME("SCHEDULE") 44 45 /* 46 * This is a little complicated due to the fact that we need to build and then 47 * free a 'struct task' for each task we enqueue. 48 * 49 * We use the default taskqueue_swi queue, since it really doesn't matter what 50 * else we're queued along with. 51 */ 52 53 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task"); 54 55 static void AcpiOsExecuteQueue(void *arg, int pending); 56 57 struct acpi_task { 58 struct task at_task; 59 OSD_EXECUTION_CALLBACK at_function; 60 void *at_context; 61 }; 62 63 ACPI_STATUS 64 AcpiOsQueueForExecution(UINT32 Priority, OSD_EXECUTION_CALLBACK Function, void *Context) 65 { 66 struct acpi_task *at; 67 68 FUNCTION_TRACE(__func__); 69 70 if (Function == NULL) 71 return_ACPI_STATUS(AE_BAD_PARAMETER); 72 73 at = malloc(sizeof(*at), M_ACPITASK, M_NOWAIT); /* Interrupt Context */ 74 if (at == NULL) 75 return_ACPI_STATUS(AE_NO_MEMORY); 76 bzero(at, sizeof(*at)); 77 78 at->at_function = Function; 79 at->at_context = Context; 80 at->at_task.ta_func = AcpiOsExecuteQueue; 81 at->at_task.ta_context = at; 82 switch (Priority) { 83 case OSD_PRIORITY_GPE: 84 at->at_task.ta_priority = 4; 85 break; 86 case OSD_PRIORITY_HIGH: 87 at->at_task.ta_priority = 3; 88 break; 89 case OSD_PRIORITY_MED: 90 at->at_task.ta_priority = 2; 91 break; 92 case OSD_PRIORITY_LO: 93 at->at_task.ta_priority = 1; 94 break; 95 default: 96 free(at, M_ACPITASK); 97 return_ACPI_STATUS(AE_BAD_PARAMETER); 98 } 99 100 taskqueue_enqueue(taskqueue_swi, (struct task *)at); 101 return_ACPI_STATUS(AE_OK); 102 } 103 104 static void 105 AcpiOsExecuteQueue(void *arg, int pending) 106 { 107 struct acpi_task *at = (struct acpi_task *)arg; 108 OSD_EXECUTION_CALLBACK Function; 109 void *Context; 110 111 FUNCTION_TRACE(__func__); 112 113 Function = (OSD_EXECUTION_CALLBACK)at->at_function; 114 Context = at->at_context; 115 116 free(at, M_ACPITASK); 117 118 Function(Context); 119 return_VOID; 120 } 121 122 /* 123 * We don't have any sleep granularity better than hz, so 124 * make do with that. 125 */ 126 void 127 AcpiOsSleep (UINT32 Seconds, UINT32 Milliseconds) 128 { 129 int timo; 130 static int dummy; 131 132 FUNCTION_TRACE(__func__); 133 134 timo = (Seconds * hz) + Milliseconds * hz / 1000; 135 if (timo == 0) 136 timo = 1; 137 tsleep(&dummy, 0, "acpislp", timo); 138 return_VOID; 139 } 140 141 void 142 AcpiOsSleepUsec (UINT32 Microseconds) 143 { 144 FUNCTION_TRACE(__func__); 145 146 if (Microseconds > 1000) { /* long enough to be worth the overhead of sleeping */ 147 AcpiOsSleep(0, Microseconds / 1000); 148 } else { 149 DELAY(Microseconds); 150 } 151 return_VOID; 152 } 153 154 UINT32 155 AcpiOsGetThreadId (void) 156 { 157 /* XXX do not add FUNCTION_TRACE here, results in recursive call */ 158 159 KASSERT(curproc != NULL, (__func__ ": curproc is NULL!")); 160 return(curproc->p_pid + 1); /* can't return 0 */ 161 } 162