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 * 6.3 : 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/proc.h> 43 #include <sys/msgport.h> 44 #include <sys/taskqueue.h> 45 #include <machine/clock.h> 46 47 #include <sys/thread2.h> 48 #include <sys/msgport2.h> 49 #include <sys/mplock2.h> 50 51 #include "acpi.h" 52 #include "accommon.h" 53 #include <dev/acpica/acpivar.h> 54 55 #define _COMPONENT ACPI_OS_SERVICES 56 ACPI_MODULE_NAME("SCHEDULE") 57 58 /* 59 * This is a little complicated due to the fact that we need to build and then 60 * free a 'struct task' for each task we enqueue. 61 */ 62 63 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task"); 64 65 static void acpi_task_thread(void *arg); 66 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg); 67 68 struct acpi_task { 69 struct lwkt_msg at_msg; 70 ACPI_OSD_EXEC_CALLBACK at_function; 71 void *at_context; 72 ACPI_EXECUTE_TYPE at_type; 73 }; 74 75 static struct thread *acpi_task_td; 76 struct lwkt_port acpi_afree_rport; 77 78 /* 79 * Initialize the ACPI helper thread. 80 */ 81 int 82 acpi_task_thread_init(void) 83 { 84 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply); 85 kthread_create(acpi_task_thread, NULL, &acpi_task_td, "acpi_task"); 86 return (0); 87 } 88 89 /* 90 * The ACPI helper thread processes OSD execution callback messages. 91 */ 92 static void 93 acpi_task_thread(void *arg) 94 { 95 ACPI_OSD_EXEC_CALLBACK func; 96 struct acpi_task *at; 97 98 get_mplock(); 99 for (;;) { 100 at = (void *)lwkt_waitport(&curthread->td_msgport, 0); 101 func = at->at_function; 102 func(at->at_context); 103 lwkt_replymsg(&at->at_msg, 0); 104 } 105 rel_mplock(); 106 } 107 108 /* 109 * Queue an ACPI message for execution by allocating a LWKT message structure 110 * and sending the message to the helper thread. The reply port is setup 111 * to automatically free the message. 112 */ 113 ACPI_STATUS 114 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 115 void *Context) 116 { 117 struct acpi_task *at; 118 119 switch (Type) { 120 case OSL_GLOBAL_LOCK_HANDLER: 121 case OSL_NOTIFY_HANDLER: 122 case OSL_GPE_HANDLER: 123 case OSL_DEBUGGER_THREAD: 124 case OSL_EC_POLL_HANDLER: 125 case OSL_EC_BURST_HANDLER: 126 break; 127 default: 128 return_ACPI_STATUS (AE_BAD_PARAMETER); 129 } 130 131 /* Note: Interrupt Context */ 132 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO); 133 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0); 134 at->at_function = Function; 135 at->at_context = Context; 136 at->at_type = Type; 137 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg); 138 return_ACPI_STATUS (AE_OK); 139 } 140 141 /* 142 * The message's reply port just frees the message. 143 */ 144 static void 145 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 146 { 147 kfree(msg, M_ACPITASK); 148 } 149 150 UINT64 151 AcpiOsGetTimer (void) 152 { 153 struct timeval time; 154 155 microtime(&time); 156 157 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */ 158 159 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10)); 160 } 161 162 void 163 AcpiOsSleep(ACPI_INTEGER Milliseconds) 164 { 165 int timo; 166 static int dummy; 167 168 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 169 170 timo = Milliseconds * hz / 1000; 171 172 /* 173 * If requested sleep time is less than our hz resolution, or if 174 * the system is in early boot before the system tick is operational, 175 * use DELAY instead for better granularity. 176 */ 177 if (clocks_running == 0) { 178 while (timo > 1000000) { 179 DELAY(1000000); 180 timo -= 1000000; 181 } 182 if (timo) 183 DELAY(timo * 1000); 184 } else if (timo > 0) { 185 tsleep(&dummy, 0, "acpislp", timo); 186 } else { 187 DELAY(Milliseconds * 1000); 188 } 189 return_VOID; 190 } 191 192 void 193 AcpiOsStall(UINT32 Microseconds) 194 { 195 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 196 197 DELAY(Microseconds); 198 return_VOID; 199 } 200 201 ACPI_THREAD_ID 202 AcpiOsGetThreadId(void) 203 { 204 struct proc *p; 205 206 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */ 207 208 p = curproc; 209 if (p == NULL) 210 p = &proc0; 211 KASSERT(p != NULL, ("%s: curproc is NULL!", __func__)); 212 213 /* Returning 0 is not allowed. */ 214 return (p->p_pid + 1); 215 } 216