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 * Multithreading and 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 50 #include "acpi.h" 51 #include "accommon.h" 52 #include <dev/acpica/acpivar.h> 53 54 #define _COMPONENT ACPI_OS_SERVICES 55 ACPI_MODULE_NAME("SCHEDULE") 56 57 /* 58 * This is a little complicated due to the fact that we need to build and then 59 * free a 'struct task' for each task we enqueue. 60 */ 61 62 MALLOC_DEFINE(M_ACPITASK, "acpitask", "ACPI deferred task"); 63 64 static void acpi_task_thread(void *arg); 65 static void acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg); 66 67 struct acpi_task { 68 struct lwkt_msg at_msg; 69 ACPI_OSD_EXEC_CALLBACK at_function; 70 void *at_context; 71 ACPI_EXECUTE_TYPE at_type; 72 }; 73 74 static struct thread *acpi_task_td; 75 struct lwkt_port acpi_afree_rport; 76 77 /* 78 * Initialize the ACPI helper thread. 79 */ 80 int 81 acpi_task_thread_init(void) 82 { 83 lwkt_initport_replyonly(&acpi_afree_rport, acpi_autofree_reply); 84 acpi_task_td = kmalloc(sizeof(struct thread), M_DEVBUF, M_INTWAIT | M_ZERO); 85 lwkt_create(acpi_task_thread, NULL, NULL, acpi_task_td, TDF_NOSTART, 0, 86 "acpi_task"); 87 return (0); 88 } 89 90 void 91 acpi_task_thread_schedule(void) 92 { 93 lwkt_schedule(acpi_task_td); 94 } 95 96 /* 97 * The ACPI helper thread processes OSD execution callback messages. 98 */ 99 static void 100 acpi_task_thread(void *arg) 101 { 102 ACPI_OSD_EXEC_CALLBACK func; 103 struct acpi_task *at; 104 105 lwkt_gettoken(&acpi_token); 106 for (;;) { 107 at = (void *)lwkt_waitport(&curthread->td_msgport, 0); 108 func = at->at_function; 109 func(at->at_context); 110 lwkt_replymsg(&at->at_msg, 0); 111 } 112 lwkt_reltoken(&acpi_token); 113 } 114 115 /* 116 * Queue an ACPI message for execution by allocating a LWKT message structure 117 * and sending the message to the helper thread. The reply port is setup 118 * to automatically free the message. 119 */ 120 ACPI_STATUS 121 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 122 void *Context) 123 { 124 struct acpi_task *at; 125 126 switch (Type) { 127 case OSL_GLOBAL_LOCK_HANDLER: 128 case OSL_NOTIFY_HANDLER: 129 case OSL_GPE_HANDLER: 130 case OSL_DEBUGGER_EXEC_THREAD: 131 case OSL_EC_POLL_HANDLER: 132 case OSL_EC_BURST_HANDLER: 133 break; 134 default: 135 return_ACPI_STATUS (AE_BAD_PARAMETER); 136 } 137 138 /* Note: Interrupt Context */ 139 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO); 140 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0); 141 at->at_function = Function; 142 at->at_context = Context; 143 at->at_type = Type; 144 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg); 145 return_ACPI_STATUS (AE_OK); 146 } 147 148 /* 149 * The message's reply port just frees the message. 150 */ 151 static void 152 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 153 { 154 kfree(msg, M_ACPITASK); 155 } 156 157 UINT64 158 AcpiOsGetTimer (void) 159 { 160 struct timeval time; 161 162 microtime(&time); 163 164 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */ 165 166 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10)); 167 } 168 169 void 170 AcpiOsSleep(UINT64 Milliseconds) 171 { 172 int timo; 173 static int dummy; 174 175 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 176 177 timo = Milliseconds * hz / 1000; 178 179 /* 180 * If requested sleep time is less than our hz resolution, or if 181 * the system is in early boot before the system tick is operational, 182 * use DELAY instead for better granularity. 183 */ 184 if (clocks_running == 0) { 185 while (timo > 1000000) { 186 DELAY(1000000); 187 timo -= 1000000; 188 } 189 if (timo) 190 DELAY(timo * 1000); 191 } else if (timo > 0) { 192 tsleep(&dummy, 0, "acpislp", timo); 193 } else { 194 DELAY(Milliseconds * 1000); 195 } 196 return_VOID; 197 } 198 199 void 200 AcpiOsStall(UINT32 Microseconds) 201 { 202 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 203 204 DELAY(Microseconds); 205 return_VOID; 206 } 207 208 ACPI_THREAD_ID 209 AcpiOsGetThreadId(void) 210 { 211 struct proc *p; 212 213 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */ 214 215 p = curproc; 216 if (p == NULL) 217 p = &proc0; 218 KASSERT(p != NULL, ("%s: curproc is NULL!", __func__)); 219 220 /* Returning 0 is not allowed. */ 221 return (p->p_pid + 1); 222 } 223