1 /*- 2 * Copyright (c) 2000, 2001 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 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_acpi.h" 32 #include <sys/param.h> 33 #include <sys/kernel.h> 34 #include <sys/kthread.h> 35 #include <sys/bus.h> 36 #include <sys/proc.h> 37 #include <sys/reboot.h> 38 #include <sys/sysctl.h> 39 #include <sys/unistd.h> 40 #include <sys/power.h> 41 42 #include "acpi.h" 43 #include <dev/acpica/acpivar.h> 44 45 /* Hooks for the ACPI CA debugging infrastructure */ 46 #define _COMPONENT ACPI_THERMAL 47 ACPI_MODULE_NAME("THERMAL") 48 49 #define TZ_ZEROC 2732 50 #define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), (((x) - TZ_ZEROC) % 10) 51 52 #define TZ_NOTIFY_TEMPERATURE 0x80 /* Temperature changed. */ 53 #define TZ_NOTIFY_LEVELS 0x81 /* Cooling levels changed. */ 54 #define TZ_NOTIFY_DEVICES 0x82 /* Device lists changed. */ 55 #define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT reached. */ 56 57 /* Check for temperature changes every 10 seconds by default */ 58 #define TZ_POLLRATE 10 59 60 /* Make sure the reported temperature is valid for this number of polls. */ 61 #define TZ_VALIDCHECKS 3 62 63 /* Notify the user we will be shutting down in one more poll cycle. */ 64 #define TZ_NOTIFYCOUNT (TZ_VALIDCHECKS - 1) 65 66 /* ACPI spec defines this */ 67 #define TZ_NUMLEVELS 10 68 struct acpi_tz_zone { 69 int ac[TZ_NUMLEVELS]; 70 ACPI_BUFFER al[TZ_NUMLEVELS]; 71 int crt; 72 int hot; 73 ACPI_BUFFER psl; 74 int psv; 75 int tc1; 76 int tc2; 77 int tsp; 78 int tzp; 79 }; 80 81 struct acpi_tz_softc { 82 device_t tz_dev; 83 ACPI_HANDLE tz_handle; /*Thermal zone handle*/ 84 int tz_temperature; /*Current temperature*/ 85 int tz_active; /*Current active cooling*/ 86 #define TZ_ACTIVE_NONE -1 87 int tz_requested; /*Minimum active cooling*/ 88 int tz_thflags; /*Current temp-related flags*/ 89 #define TZ_THFLAG_NONE 0 90 #define TZ_THFLAG_PSV (1<<0) 91 #define TZ_THFLAG_HOT (1<<2) 92 #define TZ_THFLAG_CRT (1<<3) 93 int tz_flags; 94 #define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/ 95 #define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/ 96 struct timespec tz_cooling_started; 97 /*Current cooling starting time*/ 98 99 struct sysctl_ctx_list tz_sysctl_ctx; 100 struct sysctl_oid *tz_sysctl_tree; 101 102 struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/ 103 int tz_tmp_updating; 104 int tz_validchecks; 105 }; 106 107 static int acpi_tz_probe(device_t dev); 108 static int acpi_tz_attach(device_t dev); 109 static int acpi_tz_establish(struct acpi_tz_softc *sc); 110 static void acpi_tz_monitor(void *Context); 111 static void acpi_tz_all_off(struct acpi_tz_softc *sc); 112 static void acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg); 113 static void acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg); 114 static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, 115 int *data); 116 static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what); 117 static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS); 118 static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, 119 void *context); 120 static void acpi_tz_timeout(struct acpi_tz_softc *sc); 121 static void acpi_tz_power_profile(void *arg); 122 static void acpi_tz_thread(void *arg); 123 124 static device_method_t acpi_tz_methods[] = { 125 /* Device interface */ 126 DEVMETHOD(device_probe, acpi_tz_probe), 127 DEVMETHOD(device_attach, acpi_tz_attach), 128 129 {0, 0} 130 }; 131 132 static driver_t acpi_tz_driver = { 133 "acpi_tz", 134 acpi_tz_methods, 135 sizeof(struct acpi_tz_softc), 136 }; 137 138 static devclass_t acpi_tz_devclass; 139 DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0); 140 MODULE_DEPEND(acpi_tz, acpi, 1, 1, 1); 141 142 static struct sysctl_ctx_list acpi_tz_sysctl_ctx; 143 static struct sysctl_oid *acpi_tz_sysctl_tree; 144 145 /* Minimum cooling run time */ 146 static int acpi_tz_min_runtime = 0; 147 static int acpi_tz_polling_rate = TZ_POLLRATE; 148 149 /* Timezone polling thread */ 150 static struct proc *acpi_tz_proc; 151 152 /* 153 * Match an ACPI thermal zone. 154 */ 155 static int 156 acpi_tz_probe(device_t dev) 157 { 158 int result; 159 ACPI_LOCK_DECL; 160 161 ACPI_LOCK; 162 163 /* No FUNCTION_TRACE - too noisy */ 164 165 if (acpi_get_type(dev) == ACPI_TYPE_THERMAL && !acpi_disabled("thermal")) { 166 device_set_desc(dev, "Thermal Zone"); 167 result = -10; 168 } else { 169 result = ENXIO; 170 } 171 ACPI_UNLOCK; 172 return (result); 173 } 174 175 /* 176 * Attach to an ACPI thermal zone. 177 */ 178 static int 179 acpi_tz_attach(device_t dev) 180 { 181 struct acpi_tz_softc *sc; 182 struct acpi_softc *acpi_sc; 183 int error; 184 char oidname[8]; 185 ACPI_LOCK_DECL; 186 187 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 188 189 ACPI_LOCK; 190 191 sc = device_get_softc(dev); 192 sc->tz_dev = dev; 193 sc->tz_handle = acpi_get_handle(dev); 194 sc->tz_requested = TZ_ACTIVE_NONE; 195 sc->tz_tmp_updating = 0; 196 197 /* 198 * Parse the current state of the thermal zone and build control 199 * structures. 200 */ 201 if ((error = acpi_tz_establish(sc)) != 0) 202 goto out; 203 204 /* 205 * XXX Call _INI if it exists. ACPICA should do this but only handles 206 * Device objects for now. 207 */ 208 AcpiEvaluateObject(sc->tz_handle, "_INI", NULL, NULL); 209 210 /* 211 * Register for any Notify events sent to this zone. 212 */ 213 AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY, 214 acpi_tz_notify_handler, sc); 215 216 /* 217 * Create our sysctl nodes. 218 * 219 * XXX we need a mechanism for adding nodes under ACPI. 220 */ 221 if (device_get_unit(dev) == 0) { 222 acpi_sc = acpi_device_get_parent_softc(dev); 223 sysctl_ctx_init(&acpi_tz_sysctl_ctx); 224 acpi_tz_sysctl_tree = SYSCTL_ADD_NODE(&acpi_tz_sysctl_ctx, 225 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 226 OID_AUTO, "thermal", CTLFLAG_RD, 0, ""); 227 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx, 228 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 229 OID_AUTO, "min_runtime", CTLFLAG_RD | CTLFLAG_RW, 230 &acpi_tz_min_runtime, 0, 231 "minimum cooling run time in sec"); 232 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx, 233 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 234 OID_AUTO, "polling_rate", CTLFLAG_RD | CTLFLAG_RW, 235 &acpi_tz_polling_rate, 0, "monitor polling rate"); 236 } 237 sysctl_ctx_init(&sc->tz_sysctl_ctx); 238 sprintf(oidname, "tz%d", device_get_unit(dev)); 239 sc->tz_sysctl_tree = SYSCTL_ADD_NODE(&sc->tz_sysctl_ctx, 240 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 241 OID_AUTO, oidname, CTLFLAG_RD, 0, ""); 242 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 243 OID_AUTO, "temperature", CTLFLAG_RD, 244 &sc->tz_temperature, 0, "current thermal zone temperature"); 245 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 246 OID_AUTO, "active", CTLTYPE_INT | CTLFLAG_RW, 247 sc, 0, acpi_tz_active_sysctl, "I", ""); 248 249 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 250 OID_AUTO, "thermal_flags", CTLFLAG_RD, 251 &sc->tz_thflags, 0, "thermal zone flags"); 252 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 253 OID_AUTO, "_PSV", CTLFLAG_RD, 254 &sc->tz_zone.psv, 0, ""); 255 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 256 OID_AUTO, "_HOT", CTLFLAG_RD, 257 &sc->tz_zone.hot, 0, ""); 258 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 259 OID_AUTO, "_CRT", CTLFLAG_RD, 260 &sc->tz_zone.crt, 0, ""); 261 SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 262 OID_AUTO, "_ACx", CTLFLAG_RD, &sc->tz_zone.ac, 263 sizeof(sc->tz_zone.ac), "I", ""); 264 265 /* 266 * Register our power profile event handler, and flag it for a manual 267 * invocation by our timeout. We defer it like this so that the rest 268 * of the subsystem has time to come up. 269 */ 270 EVENTHANDLER_REGISTER(power_profile_change, acpi_tz_power_profile, sc, 0); 271 sc->tz_flags |= TZ_FLAG_GETPROFILE; 272 273 /* 274 * Don't bother evaluating/printing the temperature at this point; 275 * on many systems it'll be bogus until the EC is running. 276 */ 277 278 /* 279 * Create our thread; we only need one, it will service all of the 280 * thermal zones. 281 */ 282 if (acpi_tz_proc == NULL) { 283 error = kthread_create(acpi_tz_thread, NULL, &acpi_tz_proc, 284 RFHIGHPID, 0, "acpi_thermal"); 285 if (error != 0) { 286 device_printf(sc->tz_dev, "could not create thread - %d", 287 error); 288 goto out; 289 } 290 } 291 292 out: 293 ACPI_UNLOCK; 294 295 return_VALUE (error); 296 } 297 298 /* 299 * Parse the current state of this thermal zone and set up to use it. 300 * 301 * Note that we may have previous state, which will have to be discarded. 302 */ 303 static int 304 acpi_tz_establish(struct acpi_tz_softc *sc) 305 { 306 ACPI_OBJECT *obj; 307 int i; 308 char nbuf[8]; 309 310 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 311 312 ACPI_ASSERTLOCK; 313 314 /* Power everything off and erase any existing state. */ 315 acpi_tz_all_off(sc); 316 for (i = 0; i < TZ_NUMLEVELS; i++) 317 if (sc->tz_zone.al[i].Pointer != NULL) 318 AcpiOsFree(sc->tz_zone.al[i].Pointer); 319 if (sc->tz_zone.psl.Pointer != NULL) 320 AcpiOsFree(sc->tz_zone.psl.Pointer); 321 bzero(&sc->tz_zone, sizeof(sc->tz_zone)); 322 323 /* Evaluate thermal zone parameters. */ 324 for (i = 0; i < TZ_NUMLEVELS; i++) { 325 sprintf(nbuf, "_AC%d", i); 326 acpi_tz_getparam(sc, nbuf, &sc->tz_zone.ac[i]); 327 sprintf(nbuf, "_AL%d", i); 328 sc->tz_zone.al[i].Length = ACPI_ALLOCATE_BUFFER; 329 sc->tz_zone.al[i].Pointer = NULL; 330 AcpiEvaluateObject(sc->tz_handle, nbuf, NULL, &sc->tz_zone.al[i]); 331 obj = (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer; 332 if (obj != NULL) { 333 /* Should be a package containing a list of power objects */ 334 if (obj->Type != ACPI_TYPE_PACKAGE) { 335 device_printf(sc->tz_dev, "%s has unknown type %d, rejecting\n", 336 nbuf, obj->Type); 337 return_VALUE (ENXIO); 338 } 339 } 340 } 341 acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt); 342 acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot); 343 sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER; 344 sc->tz_zone.psl.Pointer = NULL; 345 AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl); 346 acpi_tz_getparam(sc, "_PSV", &sc->tz_zone.psv); 347 acpi_tz_getparam(sc, "_TC1", &sc->tz_zone.tc1); 348 acpi_tz_getparam(sc, "_TC2", &sc->tz_zone.tc2); 349 acpi_tz_getparam(sc, "_TSP", &sc->tz_zone.tsp); 350 acpi_tz_getparam(sc, "_TZP", &sc->tz_zone.tzp); 351 352 /* 353 * Sanity-check the values we've been given. 354 * 355 * XXX what do we do about systems that give us the same value for 356 * more than one of these setpoints? 357 */ 358 acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT"); 359 acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT"); 360 acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV"); 361 for (i = 0; i < TZ_NUMLEVELS; i++) 362 acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx"); 363 364 /* 365 * Power off everything that we've just been given. 366 */ 367 acpi_tz_all_off(sc); 368 369 return_VALUE (0); 370 } 371 372 static char *aclevel_string[] = { 373 "NONE", "_AC0", "_AC1", "_AC2", "_AC3", "_AC4", 374 "_AC5", "_AC6", "_AC7", "_AC8", "_AC9" }; 375 376 static __inline const char * 377 acpi_tz_aclevel_string(int active) 378 { 379 if (active < -1 || active >= TZ_NUMLEVELS) 380 return (aclevel_string[0]); 381 382 return (aclevel_string[active+1]); 383 } 384 385 /* 386 * Evaluate the condition of a thermal zone, take appropriate actions. 387 */ 388 static void 389 acpi_tz_monitor(void *Context) 390 { 391 struct acpi_tz_softc *sc; 392 struct timespec curtime; 393 int temp; 394 int i; 395 int newactive, newflags; 396 ACPI_STATUS status; 397 398 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 399 400 ACPI_ASSERTLOCK; 401 402 sc = (struct acpi_tz_softc *)Context; 403 if (sc->tz_tmp_updating) 404 goto out; 405 sc->tz_tmp_updating = 1; 406 407 /* Get the current temperature. */ 408 status = acpi_GetInteger(sc->tz_handle, "_TMP", &temp); 409 if (ACPI_FAILURE(status)) { 410 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 411 "error fetching current temperature -- %s\n", 412 AcpiFormatException(status)); 413 /* XXX disable zone? go to max cooling? */ 414 goto out; 415 } 416 417 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp))); 418 sc->tz_temperature = temp; 419 420 /* 421 * Work out what we ought to be doing right now. 422 * 423 * Note that the _ACx levels sort from hot to cold. 424 */ 425 newactive = TZ_ACTIVE_NONE; 426 for (i = TZ_NUMLEVELS - 1; i >= 0; i--) { 427 if ((sc->tz_zone.ac[i] != -1) && (temp >= sc->tz_zone.ac[i])) { 428 newactive = i; 429 if (sc->tz_active != newactive) { 430 ACPI_VPRINT(sc->tz_dev, 431 acpi_device_get_parent_softc(sc->tz_dev), 432 "_AC%d: temperature %d.%d >= setpoint %d.%d\n", i, 433 TZ_KELVTOC(temp), TZ_KELVTOC(sc->tz_zone.ac[i])); 434 getnanotime(&sc->tz_cooling_started); 435 } 436 } 437 } 438 439 /* 440 * We are going to get _ACx level down (colder side), but give a guaranteed 441 * minimum cooling run time if requested. 442 */ 443 if (acpi_tz_min_runtime > 0 && sc->tz_active != TZ_ACTIVE_NONE && 444 (newactive == TZ_ACTIVE_NONE || newactive > sc->tz_active)) { 445 446 getnanotime(&curtime); 447 timespecsub(&curtime, &sc->tz_cooling_started); 448 if (curtime.tv_sec < acpi_tz_min_runtime) 449 newactive = sc->tz_active; 450 } 451 452 /* Handle user override of active mode */ 453 if (sc->tz_requested != TZ_ACTIVE_NONE && sc->tz_requested < newactive) 454 newactive = sc->tz_requested; 455 456 /* update temperature-related flags */ 457 newflags = TZ_THFLAG_NONE; 458 if (sc->tz_zone.psv != -1 && temp >= sc->tz_zone.psv) 459 newflags |= TZ_THFLAG_PSV; 460 if (sc->tz_zone.hot != -1 && temp >= sc->tz_zone.hot) 461 newflags |= TZ_THFLAG_HOT; 462 if (sc->tz_zone.crt != -1 && temp >= sc->tz_zone.crt) 463 newflags |= TZ_THFLAG_CRT; 464 465 /* If the active cooling state has changed, we have to switch things. */ 466 if (newactive != sc->tz_active) { 467 /* Turn off the cooling devices that are on, if any are */ 468 if (sc->tz_active != TZ_ACTIVE_NONE) 469 acpi_ForeachPackageObject( 470 (ACPI_OBJECT *)sc->tz_zone.al[sc->tz_active].Pointer, 471 acpi_tz_switch_cooler_off, sc); 472 473 /* Turn on cooling devices that are required, if any are */ 474 if (newactive != TZ_ACTIVE_NONE) { 475 acpi_ForeachPackageObject( 476 (ACPI_OBJECT *)sc->tz_zone.al[newactive].Pointer, 477 acpi_tz_switch_cooler_on, sc); 478 } 479 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 480 "switched from %s to %s: %d.%dC\n", 481 acpi_tz_aclevel_string(sc->tz_active), 482 acpi_tz_aclevel_string(newactive), TZ_KELVTOC(temp)); 483 sc->tz_active = newactive; 484 } 485 486 /* XXX (de)activate any passive cooling that may be required. */ 487 488 /* 489 * If the temperature is at _HOT or _CRT, increment our event count. 490 * If it has occurred enough times, shutdown the system. This is 491 * needed because some systems will report an invalid high temperature 492 * for one poll cycle. It is suspected this is due to the embedded 493 * controller timing out. A typical value is 138C for one cycle on 494 * a system that is otherwise 65C. 495 * 496 * If we're almost at that threshold, notify the user through devd(8). 497 */ 498 if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) { 499 sc->tz_validchecks++; 500 if (sc->tz_validchecks == TZ_VALIDCHECKS) { 501 device_printf(sc->tz_dev, 502 "WARNING - current temperature (%d.%dC) exceeds safe limits\n", 503 TZ_KELVTOC(sc->tz_temperature)); 504 shutdown_nice(RB_POWEROFF); 505 } else if (sc->tz_validchecks == TZ_NOTIFYCOUNT) 506 acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL); 507 } else { 508 sc->tz_validchecks = 0; 509 } 510 sc->tz_thflags = newflags; 511 512 out: 513 sc->tz_tmp_updating = 0; 514 return_VOID; 515 } 516 517 /* 518 * Turn off all the cooling devices. 519 */ 520 static void 521 acpi_tz_all_off(struct acpi_tz_softc *sc) 522 { 523 int i; 524 525 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 526 527 ACPI_ASSERTLOCK; 528 529 /* Scan all the _ALx objects and turn them all off. */ 530 for (i = 0; i < TZ_NUMLEVELS; i++) { 531 if (sc->tz_zone.al[i].Pointer == NULL) 532 continue; 533 acpi_ForeachPackageObject((ACPI_OBJECT *)sc->tz_zone.al[i].Pointer, 534 acpi_tz_switch_cooler_off, sc); 535 } 536 537 /* 538 * XXX revert any passive-cooling options. 539 */ 540 541 sc->tz_active = TZ_ACTIVE_NONE; 542 sc->tz_thflags = TZ_THFLAG_NONE; 543 544 return_VOID; 545 } 546 547 /* 548 * Given an object, verify that it's a reference to a device of some sort, 549 * and try to switch it off. 550 */ 551 static void 552 acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg) 553 { 554 ACPI_HANDLE cooler; 555 556 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 557 558 ACPI_ASSERTLOCK; 559 560 cooler = acpi_GetReference(NULL, obj); 561 if (cooler == NULL) { 562 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); 563 return_VOID; 564 } 565 566 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s off\n", 567 acpi_name(cooler))); 568 acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3); 569 570 return_VOID; 571 } 572 573 /* 574 * Given an object, verify that it's a reference to a device of some sort, 575 * and try to switch it on. 576 * 577 * XXX replication of off/on function code is bad. 578 */ 579 static void 580 acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg) 581 { 582 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; 583 ACPI_HANDLE cooler; 584 ACPI_STATUS status; 585 586 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 587 588 ACPI_ASSERTLOCK; 589 590 cooler = acpi_GetReference(NULL, obj); 591 if (cooler == NULL) { 592 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); 593 return_VOID; 594 } 595 596 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s on\n", 597 acpi_name(cooler))); 598 status = acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0); 599 if (ACPI_FAILURE(status)) { 600 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 601 "failed to activate %s - %s\n", acpi_name(cooler), 602 AcpiFormatException(status)); 603 } 604 605 return_VOID; 606 } 607 608 /* 609 * Read/debug-print a parameter, default it to -1. 610 */ 611 static void 612 acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data) 613 { 614 615 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 616 617 ACPI_ASSERTLOCK; 618 619 if (ACPI_FAILURE(acpi_GetInteger(sc->tz_handle, node, data))) { 620 *data = -1; 621 } else { 622 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "%s.%s = %d\n", 623 acpi_name(sc->tz_handle), node, *data)); 624 } 625 626 return_VOID; 627 } 628 629 /* 630 * Sanity-check a temperature value. Assume that setpoints 631 * should be between 0C and 150C. 632 */ 633 static void 634 acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what) 635 { 636 if (*val != -1 && (*val < TZ_ZEROC || *val > TZ_ZEROC + 1500)) { 637 device_printf(sc->tz_dev, "%s value is absurd, ignored (%d.%dC)\n", 638 what, TZ_KELVTOC(*val)); 639 *val = -1; 640 } 641 } 642 643 /* 644 * Respond to a sysctl on the active state node. 645 */ 646 static int 647 acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS) 648 { 649 struct acpi_tz_softc *sc; 650 int active; 651 int error; 652 ACPI_LOCK_DECL; 653 654 ACPI_LOCK; 655 656 sc = (struct acpi_tz_softc *)oidp->oid_arg1; 657 active = sc->tz_active; 658 error = sysctl_handle_int(oidp, &active, 0, req); 659 660 /* Error or no new value */ 661 if (error != 0 || req->newptr == NULL) 662 goto out; 663 if (active < -1 || active >= TZ_NUMLEVELS) { 664 error = EINVAL; 665 goto out; 666 } 667 668 /* Set new preferred level and re-switch */ 669 sc->tz_requested = active; 670 acpi_tz_monitor(sc); 671 672 out: 673 ACPI_UNLOCK; 674 return (error); 675 } 676 677 /* 678 * Respond to a Notify event sent to the zone. 679 */ 680 static void 681 acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 682 { 683 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)context; 684 685 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 686 687 ACPI_ASSERTLOCK; 688 689 switch(notify) { 690 case TZ_NOTIFY_TEMPERATURE: 691 /* Temperature change occurred */ 692 AcpiOsQueueForExecution(OSD_PRIORITY_HIGH, acpi_tz_monitor, sc); 693 break; 694 case TZ_NOTIFY_DEVICES: 695 case TZ_NOTIFY_LEVELS: 696 /* Zone devices/setpoints changed */ 697 AcpiOsQueueForExecution(OSD_PRIORITY_HIGH, 698 (OSD_EXECUTION_CALLBACK)acpi_tz_establish, sc); 699 break; 700 default: 701 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 702 "unknown Notify event 0x%x\n", notify); 703 break; 704 } 705 706 acpi_UserNotify("Thermal", h, notify); 707 708 return_VOID; 709 } 710 711 /* 712 * Poll the thermal zone. 713 */ 714 static void 715 acpi_tz_timeout(struct acpi_tz_softc *sc) 716 { 717 /* Do we need to get the power profile settings? */ 718 if (sc->tz_flags & TZ_FLAG_GETPROFILE) { 719 acpi_tz_power_profile((void *)sc); 720 sc->tz_flags &= ~TZ_FLAG_GETPROFILE; 721 } 722 723 ACPI_ASSERTLOCK; 724 725 /* Check the current temperature and take action based on it */ 726 acpi_tz_monitor(sc); 727 728 /* XXX passive cooling actions? */ 729 } 730 731 /* 732 * System power profile may have changed; fetch and notify the 733 * thermal zone accordingly. 734 * 735 * Since this can be called from an arbitrary eventhandler, it needs 736 * to get the ACPI lock itself. 737 */ 738 static void 739 acpi_tz_power_profile(void *arg) 740 { 741 ACPI_STATUS status; 742 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; 743 int state; 744 ACPI_LOCK_DECL; 745 746 state = power_profile_get_state(); 747 if (state != POWER_PROFILE_PERFORMANCE && state != POWER_PROFILE_ECONOMY) 748 return; 749 750 ACPI_LOCK; 751 752 /* check that we haven't decided there's no _SCP method */ 753 if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) { 754 755 /* Call _SCP to set the new profile */ 756 status = acpi_SetInteger(sc->tz_handle, "_SCP", 757 (state == POWER_PROFILE_PERFORMANCE) ? 0 : 1); 758 if (ACPI_FAILURE(status)) { 759 if (status != AE_NOT_FOUND) 760 ACPI_VPRINT(sc->tz_dev, 761 acpi_device_get_parent_softc(sc->tz_dev), 762 "can't evaluate %s._SCP - %s\n", 763 acpi_name(sc->tz_handle), 764 AcpiFormatException(status)); 765 sc->tz_flags |= TZ_FLAG_NO_SCP; 766 } else { 767 /* We have to re-evaluate the entire zone now */ 768 AcpiOsQueueForExecution(OSD_PRIORITY_HIGH, 769 (OSD_EXECUTION_CALLBACK)acpi_tz_establish, 770 sc); 771 } 772 } 773 774 ACPI_UNLOCK; 775 } 776 777 /* 778 * Thermal zone monitor thread. 779 */ 780 static void 781 acpi_tz_thread(void *arg) 782 { 783 device_t *devs; 784 int devcount, i; 785 ACPI_LOCK_DECL; 786 787 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 788 789 devs = NULL; 790 devcount = 0; 791 792 for (;;) { 793 tsleep(&acpi_tz_proc, PZERO, "tzpoll", hz * acpi_tz_polling_rate); 794 795 #if __FreeBSD_version >= 500000 796 mtx_lock(&Giant); 797 #endif 798 799 if (devcount == 0) 800 devclass_get_devices(acpi_tz_devclass, &devs, &devcount); 801 802 ACPI_LOCK; 803 for (i = 0; i < devcount; i++) 804 acpi_tz_timeout(device_get_softc(devs[i])); 805 ACPI_UNLOCK; 806 807 #if __FreeBSD_version >= 500000 808 mtx_unlock(&Giant); 809 #endif 810 } 811 } 812