acpi_tz.c revision 1.30
1 /* $NetBSD: acpi_tz.c,v 1.30 2007/12/05 07:06:51 ad 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 1.30 2007/12/05 07:06:51 ad 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 aprint_verbose("%s: unable to get polling interval; using default of", 174 sc->sc_dev.dv_xname); 175 sc->sc_zone.tzp = ATZ_TZP_RATE; 176 } else { 177 sc->sc_zone.tzp = v; 178 aprint_verbose("%s: polling interval is", sc->sc_dev.dv_xname); 179 } 180 aprint_verbose(" %d.%ds\n", sc->sc_zone.tzp / 10, sc->sc_zone.tzp % 10); 181 182 /* XXX a value of 0 means "polling is not necessary" */ 183 if (sc->sc_zone.tzp == 0) 184 sc->sc_zone.tzp = ATZ_TZP_RATE; 185 186 sc->sc_zone_expire = ATZ_ZONE_EXPIRE / sc->sc_zone.tzp; 187 sc->sc_first = 1; 188 189 acpitz_get_zone(sc, 1); 190 acpitz_get_status(sc); 191 192 rv = AcpiInstallNotifyHandler(sc->sc_devnode->ad_handle, 193 ACPI_SYSTEM_NOTIFY, acpitz_notify_handler, sc); 194 if (ACPI_FAILURE(rv)) { 195 aprint_error(": unable to install SYSTEM NOTIFY handler: %s\n", 196 AcpiFormatException(rv)); 197 return; 198 } 199 200 callout_init(&sc->sc_callout, 0); 201 callout_setfunc(&sc->sc_callout, acpitz_tick, sc); 202 203 acpitz_init_envsys(sc); 204 205 callout_schedule(&sc->sc_callout, sc->sc_zone.tzp * hz / 10); 206 } 207 208 static void 209 acpitz_get_zone_quiet(void *opaque) 210 { 211 acpitz_get_zone(opaque, 0); 212 } 213 214 static void 215 acpitz_get_status(void *opaque) 216 { 217 struct acpitz_softc *sc = opaque; 218 UINT32 tmp, active; 219 int i, flags; 220 221 sc->sc_zone_expire--; 222 if (sc->sc_zone_expire <= 0) { 223 sc->sc_zone_expire = ATZ_ZONE_EXPIRE / sc->sc_zone.tzp; 224 if (sc->sc_flags & ATZ_F_VERBOSE) 225 printf("%s: force refetch zone\n", sc->sc_dev.dv_xname); 226 acpitz_get_zone(sc, 0); 227 } 228 229 if (acpitz_get_integer(sc, "_TMP", &tmp)) { 230 aprint_error("%s: failed to evaluate _TMP\n", 231 sc->sc_dev.dv_xname); 232 return; 233 } 234 sc->sc_zone.tmp = tmp; 235 /* XXX sanity check for tmp here? */ 236 237 /* 238 * The temperature unit for envsys(4) is microKelvin, so convert to 239 * that from ACPI's microKelvin. Also, the ACPI specification assumes 240 * that K = C + 273.2 rather than the nominal 273.15 used by envsys(4), 241 * so we correct for that too. 242 */ 243 sc->sc_sensor.value_cur = sc->sc_zone.tmp * 100000 - 50000; 244 sc->sc_sensor.state = ENVSYS_SVALID; 245 246 if (sc->sc_flags & ATZ_F_VERBOSE) 247 acpitz_print_status(sc); 248 249 if (sc->sc_flags & ATZ_F_PASSIVEONLY) { 250 /* Passive Cooling: XXX not yet */ 251 252 } else { 253 /* Active Cooling */ 254 255 /* temperature threshold: _AC0 > ... > _AC9 */ 256 active = ATZ_ACTIVE_NONE; 257 for (i = ATZ_NLEVELS - 1; i >= 0; i--) { 258 if (sc->sc_zone.ac[i] == ATZ_TMP_INVALID) 259 continue; 260 261 /* we want to keep highest cooling mode in 'active' */ 262 if (sc->sc_zone.ac[i] <= tmp) 263 active = i; 264 } 265 266 flags = sc->sc_flags & ~(ATZ_F_CRITICAL|ATZ_F_HOT|ATZ_F_PASSIVE); 267 if (sc->sc_zone.psv != ATZ_TMP_INVALID && 268 tmp >= sc->sc_zone.psv) 269 flags |= ATZ_F_PASSIVE; 270 if (sc->sc_zone.hot != ATZ_TMP_INVALID && 271 tmp >= sc->sc_zone.hot) 272 flags |= ATZ_F_HOT; 273 if (sc->sc_zone.crt != ATZ_TMP_INVALID && 274 tmp >= sc->sc_zone.crt) 275 flags |= ATZ_F_CRITICAL; 276 277 if (flags != sc->sc_flags) { 278 int changed = (sc->sc_flags ^ flags) & flags; 279 sc->sc_flags = flags; 280 if (changed & ATZ_F_CRITICAL) { 281 sc->sc_sensor.state = ENVSYS_SCRITICAL; 282 printf("%s: zone went critical at temp %sC\n", 283 sc->sc_dev.dv_xname, 284 acpitz_celcius_string(tmp)); 285 } else if (changed & ATZ_F_HOT) { 286 sc->sc_sensor.state = ENVSYS_SWARNOVER; 287 printf("%s: zone went hot at temp %sC\n", 288 sc->sc_dev.dv_xname, 289 acpitz_celcius_string(tmp)); 290 } 291 } 292 293 /* power on fans */ 294 if (sc->sc_active != active) { 295 if (sc->sc_active != ATZ_ACTIVE_NONE) 296 acpitz_power_zone(sc, sc->sc_active, 0); 297 298 if (active != ATZ_ACTIVE_NONE) { 299 if (sc->sc_flags & ATZ_F_VERBOSE) 300 printf("%s: active cooling level %u\n", 301 sc->sc_dev.dv_xname, active); 302 acpitz_power_zone(sc, active, 1); 303 } 304 305 sc->sc_active = active; 306 } 307 } 308 309 return; 310 } 311 312 static char * 313 acpitz_celcius_string(int dk) 314 { 315 static char buf[10]; 316 317 snprintf(buf, sizeof(buf), "%d.%d", (dk - ATZ_ZEROC) / 10, 318 (dk - ATZ_ZEROC) % 10); 319 320 return buf; 321 } 322 323 static void 324 acpitz_print_status(struct acpitz_softc *sc) 325 { 326 327 printf("%s: zone temperature is now %sC\n", sc->sc_dev.dv_xname, 328 acpitz_celcius_string(sc->sc_zone.tmp)); 329 330 return; 331 } 332 333 static ACPI_STATUS 334 acpitz_switch_cooler(ACPI_OBJECT *obj, void *arg) 335 { 336 ACPI_HANDLE cooler; 337 ACPI_STATUS rv; 338 int pwr_state, flag; 339 340 flag = *(int *)arg; 341 342 if (flag) 343 pwr_state = ACPI_STATE_D0; 344 else 345 pwr_state = ACPI_STATE_D3; 346 347 switch(obj->Type) { 348 case ACPI_TYPE_ANY: 349 cooler = obj->Reference.Handle; 350 break; 351 case ACPI_TYPE_STRING: 352 rv = AcpiGetHandle(NULL, obj->String.Pointer, &cooler); 353 if (ACPI_FAILURE(rv)) { 354 printf("failed to get handler from %s\n", 355 obj->String.Pointer); 356 return rv; 357 } 358 break; 359 default: 360 printf("unknown power type: %d\n", obj->Type); 361 return AE_OK; 362 } 363 364 rv = acpi_pwr_switch_consumer(cooler, pwr_state); 365 if (rv != AE_BAD_PARAMETER && ACPI_FAILURE(rv)) { 366 printf("failed to change state for %s: %s\n", 367 acpi_name(obj->Reference.Handle), 368 AcpiFormatException(rv)); 369 } 370 371 return AE_OK; 372 } 373 374 /* 375 * acpitz_power_zone: 376 * power on or off the i:th part of the zone zone 377 */ 378 static void 379 acpitz_power_zone(struct acpitz_softc *sc, int i, int on) 380 { 381 KASSERT(i >= 0 && i < ATZ_NLEVELS); 382 383 acpi_foreach_package_object(sc->sc_zone.al[i].Pointer, 384 acpitz_switch_cooler, &on); 385 } 386 387 388 /* 389 * acpitz_power_off: 390 * power off parts of the zone 391 */ 392 static void 393 acpitz_power_off(struct acpitz_softc *sc) 394 { 395 int i; 396 397 for (i = 0 ; i < ATZ_NLEVELS; i++) { 398 if (sc->sc_zone.al[i].Pointer == NULL) 399 continue; 400 acpitz_power_zone(sc, i, 0); 401 } 402 sc->sc_active = ATZ_ACTIVE_NONE; 403 sc->sc_flags &= ~(ATZ_F_CRITICAL|ATZ_F_HOT|ATZ_F_PASSIVE); 404 } 405 406 static void 407 acpitz_get_zone(void *opaque, int verbose) 408 { 409 struct acpitz_softc *sc = opaque; 410 ACPI_STATUS rv; 411 char buf[8]; 412 int i, valid_levels; 413 414 if (!sc->sc_first) { 415 acpitz_power_off(sc); 416 417 for (i = 0; i < ATZ_NLEVELS; i++) { 418 if (sc->sc_zone.al[i].Pointer != NULL) 419 AcpiOsFree(sc->sc_zone.al[i].Pointer); 420 sc->sc_zone.al[i].Pointer = NULL; 421 } 422 } else 423 aprint_normal(":"); 424 425 valid_levels = 0; 426 427 for (i = 0; i < ATZ_NLEVELS; i++) { 428 ACPI_OBJECT *obj; 429 430 snprintf(buf, sizeof(buf), "_AC%d", i); 431 if (acpitz_get_integer(sc, buf, &sc->sc_zone.ac[i])) 432 continue; 433 434 snprintf(buf, sizeof(buf), "_AL%d", i); 435 rv = acpi_eval_struct(sc->sc_devnode->ad_handle, buf, 436 &sc->sc_zone.al[i]); 437 if (ACPI_FAILURE(rv)) { 438 sc->sc_zone.al[i].Pointer = NULL; 439 continue; 440 } 441 442 obj = sc->sc_zone.al[i].Pointer; 443 if (obj != NULL) { 444 if (obj->Type != ACPI_TYPE_PACKAGE) { 445 aprint_error("%d not package\n", i); 446 AcpiOsFree(obj); 447 sc->sc_zone.al[i].Pointer = NULL; 448 continue; 449 } 450 } 451 452 if (sc->sc_first) 453 aprint_normal(" active cooling level %d: %sC", i, 454 acpitz_celcius_string(sc->sc_zone.ac[i])); 455 456 valid_levels++; 457 } 458 459 acpitz_get_integer(sc, "_TMP", &sc->sc_zone.tmp); 460 acpitz_get_integer(sc, "_CRT", &sc->sc_zone.crt); 461 acpitz_get_integer(sc, "_HOT", &sc->sc_zone.hot); 462 sc->sc_zone.psl.Length = ACPI_ALLOCATE_BUFFER; 463 sc->sc_zone.psl.Pointer = NULL; 464 AcpiEvaluateObject(sc, "_PSL", NULL, &sc->sc_zone.psl); 465 acpitz_get_integer(sc, "_PSV", &sc->sc_zone.psv); 466 acpitz_get_integer(sc, "_TC1", &sc->sc_zone.tc1); 467 acpitz_get_integer(sc, "_TC2", &sc->sc_zone.tc2); 468 469 acpitz_sane_temp(&sc->sc_zone.tmp); 470 acpitz_sane_temp(&sc->sc_zone.crt); 471 acpitz_sane_temp(&sc->sc_zone.hot); 472 acpitz_sane_temp(&sc->sc_zone.psv); 473 474 if (verbose) { 475 if (sc->sc_zone.crt != ATZ_TMP_INVALID) 476 aprint_normal(" critical %sC", 477 acpitz_celcius_string(sc->sc_zone.crt)); 478 if (sc->sc_zone.hot != ATZ_TMP_INVALID) 479 aprint_normal(" hot %sC", 480 acpitz_celcius_string(sc->sc_zone.hot)); 481 if (sc->sc_zone.psv != ATZ_TMP_INVALID) 482 aprint_normal(" passive %sC", 483 acpitz_celcius_string(sc->sc_zone.tmp)); 484 } 485 486 if (valid_levels == 0) { 487 sc->sc_flags |= ATZ_F_PASSIVEONLY; 488 if (sc->sc_first) 489 aprint_normal(", passive cooling"); 490 } 491 if (verbose) 492 aprint_normal("\n"); 493 494 for (i = 0; i < ATZ_NLEVELS; i++) 495 acpitz_sane_temp(&sc->sc_zone.ac[i]); 496 497 acpitz_power_off(sc); 498 sc->sc_first = 0; 499 } 500 501 502 static void 503 acpitz_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque) 504 { 505 struct acpitz_softc *sc = opaque; 506 ACPI_OSD_EXEC_CALLBACK func = NULL; 507 const char *name; 508 int rv; 509 510 switch (notify) { 511 case ACPI_NOTIFY_ThermalZoneStatusChanged: 512 func = acpitz_get_status; 513 name = "status check"; 514 break; 515 case ACPI_NOTIFY_ThermalZoneTripPointsChanged: 516 case ACPI_NOTIFY_DeviceListsChanged: 517 func = acpitz_get_zone_quiet; 518 name = "get zone"; 519 break; 520 default: 521 printf("%s: received unhandled notify message 0x%x\n", 522 sc->sc_dev.dv_xname, notify); 523 return; 524 } 525 526 KASSERT(func != NULL); 527 528 rv = AcpiOsQueueForExecution(OSD_PRIORITY_LO, func, sc); 529 if (rv != AE_OK) 530 printf("%s: unable to queue %s\n", sc->sc_dev.dv_xname, name); 531 532 return; 533 } 534 535 static void 536 acpitz_sane_temp(UINT32 *tmp) 537 { 538 /* Sane temperatures are beteen 0 and 150 C */ 539 if (*tmp < ATZ_ZEROC || *tmp > ATZ_ZEROC + 1500) 540 *tmp = ATZ_TMP_INVALID; 541 } 542 543 static int 544 acpitz_get_integer(struct acpitz_softc *sc, const char *cm, UINT32 *val) 545 { 546 ACPI_STATUS rv; 547 ACPI_INTEGER tmp; 548 549 rv = acpi_eval_integer(sc->sc_devnode->ad_handle, cm, &tmp); 550 if (ACPI_FAILURE(rv)) { 551 #ifdef ACPI_DEBUG 552 printf("%s: failed to evaluate %s: %s\n", sc->sc_dev.dv_xname, 553 cm, AcpiFormatException(rv)); 554 #endif 555 *val = ATZ_TMP_INVALID; 556 return 1; 557 } 558 559 *val = tmp; 560 561 return 0; 562 } 563 564 static void 565 acpitz_tick(void *opaque) 566 { 567 struct acpitz_softc *sc = opaque; 568 569 AcpiOsQueueForExecution(OSD_PRIORITY_LO, acpitz_get_status, sc); 570 571 callout_schedule(&sc->sc_callout, sc->sc_zone.tzp * hz / 10); 572 } 573 574 static void 575 acpitz_init_envsys(struct acpitz_softc *sc) 576 { 577 sc->sc_sme = sysmon_envsys_create(); 578 sc->sc_sensor.monitor = true; 579 sc->sc_sensor.flags = (ENVSYS_FMONCRITICAL|ENVSYS_FMONWARNOVER); 580 strlcpy(sc->sc_sensor.desc, "temperature", sizeof(sc->sc_sensor.desc)); 581 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor)) { 582 sysmon_envsys_destroy(sc->sc_sme); 583 return; 584 } 585 586 /* hook into sysmon */ 587 sc->sc_sme->sme_name = sc->sc_dev.dv_xname; 588 sc->sc_sme->sme_cookie = sc; 589 sc->sc_sme->sme_flags = SME_DISABLE_REFRESH; 590 591 if (sysmon_envsys_register(sc->sc_sme)) { 592 printf("%s: unable to register with sysmon\n", 593 sc->sc_dev.dv_xname); 594 sysmon_envsys_destroy(sc->sc_sme); 595 } 596 } 597
Indexes created Mon Sep 29 21:09:56 GMT 2025