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 #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 acpi_task_td = kmalloc(sizeof(struct thread), M_DEVBUF, M_INTWAIT | M_ZERO); 86 lwkt_create(acpi_task_thread, NULL, NULL, acpi_task_td, TDF_NOSTART, 0, 87 "acpi_task"); 88 return (0); 89 } 90 91 void 92 acpi_task_thread_schedule(void) 93 { 94 lwkt_schedule(acpi_task_td); 95 } 96 97 /* 98 * The ACPI helper thread processes OSD execution callback messages. 99 */ 100 static void 101 acpi_task_thread(void *arg) 102 { 103 ACPI_OSD_EXEC_CALLBACK func; 104 struct acpi_task *at; 105 106 get_mplock(); 107 for (;;) { 108 at = (void *)lwkt_waitport(&curthread->td_msgport, 0); 109 func = at->at_function; 110 func(at->at_context); 111 lwkt_replymsg(&at->at_msg, 0); 112 } 113 rel_mplock(); 114 } 115 116 /* 117 * Queue an ACPI message for execution by allocating a LWKT message structure 118 * and sending the message to the helper thread. The reply port is setup 119 * to automatically free the message. 120 */ 121 ACPI_STATUS 122 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 123 void *Context) 124 { 125 struct acpi_task *at; 126 127 switch (Type) { 128 case OSL_GLOBAL_LOCK_HANDLER: 129 case OSL_NOTIFY_HANDLER: 130 case OSL_GPE_HANDLER: 131 case OSL_DEBUGGER_EXEC_THREAD: 132 case OSL_EC_POLL_HANDLER: 133 case OSL_EC_BURST_HANDLER: 134 break; 135 default: 136 return_ACPI_STATUS (AE_BAD_PARAMETER); 137 } 138 139 /* Note: Interrupt Context */ 140 at = kmalloc(sizeof(*at), M_ACPITASK, M_INTWAIT | M_ZERO); 141 lwkt_initmsg(&at->at_msg, &acpi_afree_rport, 0); 142 at->at_function = Function; 143 at->at_context = Context; 144 at->at_type = Type; 145 lwkt_sendmsg(&acpi_task_td->td_msgport, &at->at_msg); 146 return_ACPI_STATUS (AE_OK); 147 } 148 149 /* 150 * The message's reply port just frees the message. 151 */ 152 static void 153 acpi_autofree_reply(lwkt_port_t port, lwkt_msg_t msg) 154 { 155 kfree(msg, M_ACPITASK); 156 } 157 158 UINT64 159 AcpiOsGetTimer (void) 160 { 161 struct timeval time; 162 163 microtime(&time); 164 165 /* Seconds * 10^7 = 100ns(10^-7), Microseconds(10^-6) * 10^1 = 100ns */ 166 167 return (((UINT64) time.tv_sec * 10000000) + ((UINT64) time.tv_usec * 10)); 168 } 169 170 void 171 AcpiOsSleep(UINT64 Milliseconds) 172 { 173 int timo; 174 static int dummy; 175 176 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 177 178 timo = Milliseconds * hz / 1000; 179 180 /* 181 * If requested sleep time is less than our hz resolution, or if 182 * the system is in early boot before the system tick is operational, 183 * use DELAY instead for better granularity. 184 */ 185 if (clocks_running == 0) { 186 while (timo > 1000000) { 187 DELAY(1000000); 188 timo -= 1000000; 189 } 190 if (timo) 191 DELAY(timo * 1000); 192 } else if (timo > 0) { 193 tsleep(&dummy, 0, "acpislp", timo); 194 } else { 195 DELAY(Milliseconds * 1000); 196 } 197 return_VOID; 198 } 199 200 void 201 AcpiOsStall(UINT32 Microseconds) 202 { 203 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 204 205 DELAY(Microseconds); 206 return_VOID; 207 } 208 209 ACPI_THREAD_ID 210 AcpiOsGetThreadId(void) 211 { 212 struct proc *p; 213 214 /* XXX do not add ACPI_FUNCTION_TRACE here, results in recursive call. */ 215 216 p = curproc; 217 if (p == NULL) 218 p = &proc0; 219 KASSERT(p != NULL, ("%s: curproc is NULL!", __func__)); 220 221 /* Returning 0 is not allowed. */ 222 return (p->p_pid + 1); 223 } 224