acpi_tz.c revision 1.31
1 /* $NetBSD: acpi_tz.c,v 1.31 2007/12/08 23:01:30 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2003 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. The name of the author may not be used to endorse or promote products 13 * derived from this software without specific prior written permission. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 23 * 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 /* 29 * ACPI Thermal Zone driver 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: acpi_tz.c,v 1.31 2007/12/08 23:01:30 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/errno.h> 39 #include <sys/ioctl.h> 40 #include <sys/syslog.h> 41 #include <sys/device.h> 42 #include <sys/callout.h> 43 #include <sys/proc.h> 44 #include <sys/mutex.h> 45 #include <dev/sysmon/sysmonvar.h> 46 47 #include <dev/acpi/acpica.h> 48 #include <dev/acpi/acpireg.h> 49 #include <dev/acpi/acpivar.h> 50 51 /* flags */ 52 #define ATZ_F_VERBOSE 0x01 /* show events to console */ 53 #define ATZ_F_CRITICAL 0x02 /* zone critical */ 54 #define ATZ_F_HOT 0x04 /* zone hot */ 55 #define ATZ_F_PASSIVE 0x08 /* zone passive cooling */ 56 #define ATZ_F_PASSIVEONLY 0x10 /* zone is passive cooling only */ 57 58 /* no active cooling level */ 59 #define ATZ_ACTIVE_NONE -1 60 61 /* constants */ 62 #define ATZ_TZP_RATE 300 /* default if no _TZP CM present (30 secs) */ 63 #define ATZ_NLEVELS 10 /* number of cooling levels, from ACPI spec */ 64 #define ATZ_ZEROC 2732 /* 0C in tenths degrees Kelvin */ 65 #define ATZ_TMP_INVALID 0xffffffff /* invalid temperature */ 66 #define ATZ_ZONE_EXPIRE 9000 /* zone info refetch interval (15min) */ 67 68 /* sensor indexes */ 69 #define ATZ_SENSOR_TEMP 0 /* thermal zone temperature */ 70 71 static int acpitz_match(struct device *, struct cfdata *, void *); 72 static void acpitz_attach(struct device *, struct device *, void *); 73 74 /* 75 * ACPI Temperature Zone information. Note all temperatures are reported 76 * in tenths of degrees Kelvin 77 */ 78 struct acpitz_zone { 79 /* Active cooling temperature threshold */ 80 UINT32 ac[ATZ_NLEVELS]; 81 /* Package of references to all active cooling devices for a level */ 82 ACPI_BUFFER al[ATZ_NLEVELS]; 83 /* Critical temperature threshold for system shutdown */ 84 UINT32 crt; 85 /* Critical temperature threshold for S4 sleep */ 86 UINT32 hot; 87 /* Package of references to processor objects for passive cooling */ 88 ACPI_BUFFER psl; 89 /* Passive cooling temperature threshold */ 90 UINT32 psv; 91 /* Thermal constants for use in passive cooling formulas */ 92 UINT32 tc1, tc2; 93 /* Current temperature of the thermal zone */ 94 UINT32 tmp; 95 /* Thermal sampling period for passive cooling, in tenths of seconds */ 96 UINT32 tsp; 97 /* Package of references to devices in this TZ (optional) */ 98 ACPI_BUFFER tzd; 99 /* Recommended TZ polling frequency, in tenths of seconds */ 100 UINT32 tzp; 101 }; 102 103 struct acpitz_softc { 104 struct device sc_dev; 105 struct acpi_devnode *sc_devnode; 106 struct acpitz_zone sc_zone; 107 struct callout sc_callout; 108 struct sysmon_envsys *sc_sme; 109 envsys_data_t sc_sensor; 110 kmutex_t sc_mtx; 111 int sc_active; /* active cooling level */ 112 int sc_flags; 113 int sc_rate; /* tz poll rate */ 114 int sc_zone_expire; 115 116 int sc_first; 117 }; 118 119 static void acpitz_get_status(void *); 120 static void acpitz_get_zone(void *, int); 121 static void acpitz_get_zone_quiet(void *); 122 static char* acpitz_celcius_string(int); 123 static void acpitz_print_status(struct acpitz_softc *); 124 static void acpitz_power_off(struct acpitz_softc *); 125 static void acpitz_power_zone(struct acpitz_softc *, int, int); 126 static void acpitz_sane_temp(UINT32 *tmp); 127 static ACPI_STATUS 128 acpitz_switch_cooler(ACPI_OBJECT *, void *); 129 static void acpitz_notify_handler(ACPI_HANDLE, UINT32, void *); 130 static int acpitz_get_integer(struct acpitz_softc *, const char *, UINT32 *); 131 static void acpitz_tick(void *); 132 static void acpitz_init_envsys(struct acpitz_softc *); 133 134 CFATTACH_DECL(acpitz, sizeof(struct acpitz_softc), acpitz_match, 135 acpitz_attach, NULL, NULL); 136 137 /* 138 * acpitz_match: autoconf(9) match routine 139 */ 140 static int 141 acpitz_match(struct device *parent, struct cfdata *match, void *aux) 142 { 143 struct acpi_attach_args *aa = aux; 144 145 if (aa->aa_node->ad_type != ACPI_TYPE_THERMAL) 146 return 0; 147 148 return 1; 149 } 150 151 /* 152 * acpitz_attach: autoconf(9) attach routine 153 */ 154 static void 155 acpitz_attach(struct device *parent, struct device *self, void *aux) 156 { 157 struct acpitz_softc *sc = (struct acpitz_softc *)self; 158 struct acpi_attach_args *aa = aux; 159 ACPI_STATUS rv; 160 ACPI_INTEGER v; 161 162 mutex_init(&sc->sc_mtx, MUTEX_DEFAULT, IPL_NONE); 163 164 #if 0 165 sc->sc_flags = ATZ_F_VERBOSE; 166 #endif 167 sc->sc_devnode = aa->aa_node; 168 169 aprint_naive("\n"); 170 171 rv = acpi_eval_integer(sc->sc_devnode->ad_handle, "_TZP", &v); 172 if (ACPI_FAILURE(rv)) 173 sc->sc_zone.tzp = ATZ_TZP_RATE; 174 else 175 sc->sc_zone.tzp = v; 176 177 aprint_debug(" sample rate %d.%ds\n", 178 sc->sc_zone.tzp / 10, sc->sc_zone.tzp % 10); 179 180 /* XXX a value of 0 means "polling is not necessary" */ 181 if (sc->sc_zone.tzp == 0) 182 sc->sc_zone.tzp = ATZ_TZP_RATE; 183 184 sc->sc_zone_expire = ATZ_ZONE_EXPIRE / sc->sc_zone.tzp; 185 sc->sc_first = 1; 186 187 acpitz_get_zone(sc, 1); 188 acpitz_get_status(sc); 189 190 rv = AcpiInstallNotifyHandler(sc->sc_devnode->ad_handle, 191 ACPI_SYSTEM_NOTIFY, acpitz_notify_handler, sc); 192 if (ACPI_FAILURE(rv)) { 193 aprint_error(": unable to install SYSTEM NOTIFY handler: %s\n", 194 AcpiFormatException(rv)); 195 return; 196 } 197 198 callout_init(&sc->sc_callout, 0); 199 callout_setfunc(&sc->sc_callout, acpitz_tick, sc); 200 201 acpitz_init_envsys(sc); 202 203 callout_schedule(&sc->sc_callout, sc->sc_zone.tzp * hz / 10); 204 } 205 206 static void 207 acpitz_get_zone_quiet(void *opaque) 208 { 209 acpitz_get_zone(opaque, 0); 210 } 211 212 static void 213 acpitz_get_status(void *opaque) 214 { 215 struct acpitz_softc *sc = opaque; 216 UINT32 tmp, active; 217 int i, flags; 218 219 sc->sc_zone_expire--; 220 if (sc->sc_zone_expire <= 0) { 221 sc->sc_zone_expire = ATZ_ZONE_EXPIRE / sc->sc_zone.tzp; 222 if (sc->sc_flags & ATZ_F_VERBOSE) 223 printf("%s: force refetch zone\n", sc->sc_dev.dv_xname); 224 acpitz_get_zone(sc, 0); 225 } 226 227 if (acpitz_get_integer(sc, "_TMP", &tmp)) { 228 aprint_error("%s: failed to evaluate _TMP\n", 229 sc->sc_dev.dv_xname); 230 return; 231 } 232 sc->sc_zone.tmp = tmp; 233 /* XXX sanity check for tmp here? */ 234 235 /* 236 * The temperature unit for envsys(4) is microKelvin, so convert to 237 * that from ACPI's microKelvin. Also, the ACPI specification assumes 238 * that K = C + 273.2 rather than the nominal 273.15 used by envsys(4), 239 * so we correct for that too. 240 */ 241 sc->sc_sensor.value_cur = sc->sc_zone.tmp * 100000 - 50000; 242 sc->sc_sensor.state = ENVSYS_SVALID; 243 244 if (sc->sc_flags & ATZ_F_VERBOSE) 245 acpitz_print_status(sc); 246 247 if (sc->sc_flags & ATZ_F_PASSIVEONLY) { 248 /* Passive Cooling: XXX not yet */ 249 250 } else { 251 /* Active Cooling */ 252 253 /* temperature threshold: _AC0 > ... > _AC9 */ 254 active = ATZ_ACTIVE_NONE; 255 for (i = ATZ_NLEVELS - 1; i >= 0; i--) { 256 if (sc->sc_zone.ac[i] == ATZ_TMP_INVALID) 257 continue; 258 259 /* we want to keep highest cooling mode in 'active' */ 260 if (sc->sc_zone.ac[i] <= tmp) 261 active = i; 262 } 263 264 flags = sc->sc_flags & ~(ATZ_F_CRITICAL|ATZ_F_HOT|ATZ_F_PASSIVE); 265 if (sc->sc_zone.psv != ATZ_TMP_INVALID && 266 tmp >= sc->sc_zone.psv) 267 flags |= ATZ_F_PASSIVE; 268 if (sc->sc_zone.hot != ATZ_TMP_INVALID && 269 tmp >= sc->sc_zone.hot) 270 flags |= ATZ_F_HOT; 271 if (sc->sc_zone.crt != ATZ_TMP_INVALID && 272 tmp >= sc->sc_zone.crt) 273 flags |= ATZ_F_CRITICAL; 274 275 if (flags != sc->sc_flags) { 276 int changed = (sc->sc_flags ^ flags) & flags; 277 sc->sc_flags = flags; 278 if (changed & ATZ_F_CRITICAL) { 279 sc->sc_sensor.state = ENVSYS_SCRITICAL; 280 printf("%s: zone went critical at temp %sC\n", 281 sc->sc_dev.dv_xname, 282 acpitz_celcius_string(tmp)); 283 } else if (changed & ATZ_F_HOT) { 284 sc->sc_sensor.state = ENVSYS_SWARNOVER; 285 printf("%s: zone went hot at temp %sC\n", 286 sc->sc_dev.dv_xname, 287 acpitz_celcius_string(tmp)); 288 } 289 } 290 291 /* power on fans */ 292 if (sc->sc_active != active) { 293 if (sc->sc_active != ATZ_ACTIVE_NONE) 294 acpitz_power_zone(sc, sc->sc_active, 0); 295 296 if (active != ATZ_ACTIVE_NONE) { 297 if (sc->sc_flags & ATZ_F_VERBOSE) 298 printf("%s: active cooling level %u\n", 299 sc->sc_dev.dv_xname, active); 300 acpitz_power_zone(sc, active, 1); 301 } 302 303 sc->sc_active = active; 304 } 305 } 306 307 return; 308 } 309 310 static char * 311 acpitz_celcius_string(int dk) 312 { 313 static char buf[10]; 314 315 snprintf(buf, sizeof(buf), "%d.%d", (dk - ATZ_ZEROC) / 10, 316 (dk - ATZ_ZEROC) % 10); 317 318 return buf; 319 } 320 321 static void 322 acpitz_print_status(struct acpitz_softc *sc) 323 { 324 325 printf("%s: zone temperature is now %sC\n", sc->sc_dev.dv_xname, 326 acpitz_celcius_string(sc->sc_zone.tmp)); 327 328 return; 329 } 330 331 static ACPI_STATUS 332 acpitz_switch_cooler(ACPI_OBJECT *obj, void *arg) 333 { 334 ACPI_HANDLE cooler; 335 ACPI_STATUS rv; 336 int pwr_state, flag; 337 338 flag = *(int *)arg; 339 340 if (flag) 341 pwr_state = ACPI_STATE_D0; 342 else 343 pwr_state = ACPI_STATE_D3; 344 345 switch(obj->Type) { 346 case ACPI_TYPE_ANY: 347 cooler = obj->Reference.Handle; 348 break; 349 case ACPI_TYPE_STRING: 350 rv = AcpiGetHandle(NULL, obj->String.Pointer, &cooler); 351 if (ACPI_FAILURE(rv)) { 352 printf("failed to get handler from %s\n", 353 obj->String.Pointer); 354 return rv; 355 } 356 break; 357 default: 358 printf("unknown power type: %d\n", obj->Type); 359 return AE_OK; 360 } 361 362 rv = acpi_pwr_switch_consumer(cooler, pwr_state); 363 if (rv != AE_BAD_PARAMETER && ACPI_FAILURE(rv)) { 364 printf("failed to change state for %s: %s\n", 365 acpi_name(obj->Reference.Handle), 366 AcpiFormatException(rv)); 367 } 368 369 return AE_OK; 370 } 371 372 /* 373 * acpitz_power_zone: 374 * power on or off the i:th part of the zone zone 375 */ 376 static void 377 acpitz_power_zone(struct acpitz_softc *sc, int i, int on) 378 { 379 KASSERT(i >= 0 && i < ATZ_NLEVELS); 380 381 acpi_foreach_package_object(sc->sc_zone.al[i].Pointer, 382 acpitz_switch_cooler, &on); 383 } 384 385 386 /* 387 * acpitz_power_off: 388 * power off parts of the zone 389 */ 390 static void 391 acpitz_power_off(struct acpitz_softc *sc) 392 { 393 int i; 394 395 for (i = 0 ; i < ATZ_NLEVELS; i++) { 396 if (sc->sc_zone.al[i].Pointer == NULL) 397 continue; 398 acpitz_power_zone(sc, i, 0); 399 } 400 sc->sc_active = ATZ_ACTIVE_NONE; 401 sc->sc_flags &= ~(ATZ_F_CRITICAL|ATZ_F_HOT|ATZ_F_PASSIVE); 402 } 403 404 static void 405 acpitz_get_zone(void *opaque, int verbose) 406 { 407 struct acpitz_softc *sc = opaque; 408 ACPI_STATUS rv; 409 char buf[8]; 410 int i, valid_levels; 411 412 if (!sc->sc_first) { 413 acpitz_power_off(sc); 414 415 for (i = 0; i < ATZ_NLEVELS; i++) { 416 if (sc->sc_zone.al[i].Pointer != NULL) 417 AcpiOsFree(sc->sc_zone.al[i].Pointer); 418 sc->sc_zone.al[i].Pointer = NULL; 419 } 420 } else 421 aprint_normal(":"); 422 423 valid_levels = 0; 424 425 for (i = 0; i < ATZ_NLEVELS; i++) { 426 ACPI_OBJECT *obj; 427 428 snprintf(buf, sizeof(buf), "_AC%d", i); 429 if (acpitz_get_integer(sc, buf, &sc->sc_zone.ac[i])) 430 continue; 431 432 snprintf(buf, sizeof(buf), "_AL%d", i); 433 rv = acpi_eval_struct(sc->sc_devnode->ad_handle, buf, 434 &sc->sc_zone.al[i]); 435 if (ACPI_FAILURE(rv)) { 436 sc->sc_zone.al[i].Pointer = NULL; 437 continue; 438 } 439 440 obj = sc->sc_zone.al[i].Pointer; 441 if (obj != NULL) { 442 if (obj->Type != ACPI_TYPE_PACKAGE) { 443 aprint_error("%d not package\n", i); 444 AcpiOsFree(obj); 445 sc->sc_zone.al[i].Pointer = NULL; 446 continue; 447 } 448 } 449 450 if (sc->sc_first) 451 aprint_normal(" active cooling level %d: %sC", i, 452 acpitz_celcius_string(sc->sc_zone.ac[i])); 453 454 valid_levels++; 455 } 456 457 acpitz_get_integer(sc, "_TMP", &sc->sc_zone.tmp); 458 acpitz_get_integer(sc, "_CRT", &sc->sc_zone.crt); 459 acpitz_get_integer(sc, "_HOT", &sc->sc_zone.hot); 460 sc->sc_zone.psl.Length = ACPI_ALLOCATE_BUFFER; 461 sc->sc_zone.psl.Pointer = NULL; 462 AcpiEvaluateObject(sc, "_PSL", NULL, &sc->sc_zone.psl); 463 acpitz_get_integer(sc, "_PSV", &sc->sc_zone.psv); 464 acpitz_get_integer(sc, "_TC1", &sc->sc_zone.tc1); 465 acpitz_get_integer(sc, "_TC2", &sc->sc_zone.tc2); 466 467 acpitz_sane_temp(&sc->sc_zone.tmp); 468 acpitz_sane_temp(&sc->sc_zone.crt); 469 acpitz_sane_temp(&sc->sc_zone.hot); 470 acpitz_sane_temp(&sc->sc_zone.psv); 471 472 if (verbose) { 473 if (sc->sc_zone.crt != ATZ_TMP_INVALID) 474 aprint_normal(" critical %sC", 475 acpitz_celcius_string(sc->sc_zone.crt)); 476 if (sc->sc_zone.hot != ATZ_TMP_INVALID) 477 aprint_normal(" hot %sC", 478 acpitz_celcius_string(sc->sc_zone.hot)); 479 if (sc->sc_zone.psv != ATZ_TMP_INVALID) 480 aprint_normal(" passive %sC", 481 acpitz_celcius_string(sc->sc_zone.tmp)); 482 } 483 484 if (valid_levels == 0) { 485 sc->sc_flags |= ATZ_F_PASSIVEONLY; 486 if (sc->sc_first) 487 aprint_normal(", passive cooling"); 488 } 489 if (verbose) 490 aprint_normal("\n"); 491 492 for (i = 0; i < ATZ_NLEVELS; i++) 493 acpitz_sane_temp(&sc->sc_zone.ac[i]); 494 495 acpitz_power_off(sc); 496 sc->sc_first = 0; 497 } 498 499 500 static void 501 acpitz_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque) 502 { 503 struct acpitz_softc *sc = opaque; 504 ACPI_OSD_EXEC_CALLBACK func = NULL; 505 const char *name; 506 int rv; 507 508 switch (notify) { 509 case ACPI_NOTIFY_ThermalZoneStatusChanged: 510 func = acpitz_get_status; 511 name = "status check"; 512 break; 513 case ACPI_NOTIFY_ThermalZoneTripPointsChanged: 514 case ACPI_NOTIFY_DeviceListsChanged: 515 func = acpitz_get_zone_quiet; 516 name = "get zone"; 517 break; 518 default: 519 printf("%s: received unhandled notify message 0x%x\n", 520 sc->sc_dev.dv_xname, notify); 521 return; 522 } 523 524 KASSERT(func != NULL); 525 526 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, func, sc); 527 if (rv != AE_OK) 528 printf("%s: unable to queue %s\n", sc->sc_dev.dv_xname, name); 529 530 return; 531 } 532 533 static void 534 acpitz_sane_temp(UINT32 *tmp) 535 { 536 /* Sane temperatures are beteen 0 and 150 C */ 537 if (*tmp < ATZ_ZEROC || *tmp > ATZ_ZEROC + 1500) 538 *tmp = ATZ_TMP_INVALID; 539 } 540 541 static int 542 acpitz_get_integer(struct acpitz_softc *sc, const char *cm, UINT32 *val) 543 { 544 ACPI_STATUS rv; 545 ACPI_INTEGER tmp; 546 547 rv = acpi_eval_integer(sc->sc_devnode->ad_handle, cm, &tmp); 548 if (ACPI_FAILURE(rv)) { 549 #ifdef ACPI_DEBUG 550 printf("%s: failed to evaluate %s: %s\n", sc->sc_dev.dv_xname, 551 cm, AcpiFormatException(rv)); 552 #endif 553 *val = ATZ_TMP_INVALID; 554 return 1; 555 } 556 557 *val = tmp; 558 559 return 0; 560 } 561 562 static void 563 acpitz_tick(void *opaque) 564 { 565 struct acpitz_softc *sc = opaque; 566 567 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpitz_get_status, sc); 568 569 callout_schedule(&sc->sc_callout, sc->sc_zone.tzp * hz / 10); 570 } 571 572 static void 573 acpitz_init_envsys(struct acpitz_softc *sc) 574 { 575 sc->sc_sme = sysmon_envsys_create(); 576 sc->sc_sensor.monitor = true; 577 sc->sc_sensor.flags = (ENVSYS_FMONCRITICAL|ENVSYS_FMONWARNOVER); 578 strlcpy(sc->sc_sensor.desc, "temperature", sizeof(sc->sc_sensor.desc)); 579 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) { 580 sysmon_envsys_destroy(sc->sc_sme); 581 return; 582 } 583 584 /* hook into sysmon */ 585 sc->sc_sme->sme_name = sc->sc_dev.dv_xname; 586 sc->sc_sme->sme_cookie = sc; 587 sc->sc_sme->sme_flags = SME_DISABLE_REFRESH; 588 589 if (sysmon_envsys_register(sc->sc_sme)) { 590 printf("%s: unable to register with sysmon\n", 591 sc->sc_dev.dv_xname); 592 sysmon_envsys_destroy(sc->sc_sme); 593 } 594 } 595
Indexes created Mon Sep 29 21:09:56 GMT 2025