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/bus.h> 35#include <sys/cpu.h> 36#include <sys/kthread.h> 37#include <sys/malloc.h> 38#include <sys/module.h> 39#include <sys/proc.h> 40#include <sys/reboot.h> 41#include <sys/sysctl.h> 42#include <sys/unistd.h> 43#include <sys/power.h> 44 45#include "cpufreq_if.h" 46 47#include <contrib/dev/acpica/include/acpi.h> 48#include <contrib/dev/acpica/include/accommon.h> 49 50#include <dev/acpica/acpivar.h> 51 52/* Hooks for the ACPI CA debugging infrastructure */ 53#define _COMPONENT ACPI_THERMAL 54ACPI_MODULE_NAME("THERMAL") 55 56#define TZ_ZEROC 2732 57#define TZ_KELVTOC(x) (((x) - TZ_ZEROC) / 10), abs(((x) - TZ_ZEROC) % 10) 58 59#define TZ_NOTIFY_TEMPERATURE 0x80 /* Temperature changed. */ 60#define TZ_NOTIFY_LEVELS 0x81 /* Cooling levels changed. */ 61#define TZ_NOTIFY_DEVICES 0x82 /* Device lists changed. */ 62#define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT reached. */ 63 64/* Check for temperature changes every 10 seconds by default */ 65#define TZ_POLLRATE 10 66 67/* Make sure the reported temperature is valid for this number of polls. */ 68#define TZ_VALIDCHECKS 3 69 70/* Notify the user we will be shutting down in one more poll cycle. */ 71#define TZ_NOTIFYCOUNT (TZ_VALIDCHECKS - 1) 72 73/* ACPI spec defines this */ 74#define TZ_NUMLEVELS 10 75struct acpi_tz_zone { 76 int ac[TZ_NUMLEVELS]; 77 ACPI_BUFFER al[TZ_NUMLEVELS]; 78 int crt; 79 int hot; 80 ACPI_BUFFER psl; 81 int psv; 82 int tc1; 83 int tc2; 84 int tsp; 85 int tzp; 86}; 87 88struct acpi_tz_softc { 89 device_t tz_dev; 90 ACPI_HANDLE tz_handle; /*Thermal zone handle*/ 91 int tz_temperature; /*Current temperature*/ 92 int tz_active; /*Current active cooling*/ 93#define TZ_ACTIVE_NONE -1 94#define TZ_ACTIVE_UNKNOWN -2 95 int tz_requested; /*Minimum active cooling*/ 96 int tz_thflags; /*Current temp-related flags*/ 97#define TZ_THFLAG_NONE 0 98#define TZ_THFLAG_PSV (1<<0) 99#define TZ_THFLAG_HOT (1<<2) 100#define TZ_THFLAG_CRT (1<<3) 101 int tz_flags; 102#define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/ 103#define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/ 104#define TZ_FLAG_GETSETTINGS (1<<2) /*Get devs/setpoints*/ 105 struct timespec tz_cooling_started; 106 /*Current cooling starting time*/ 107 108 struct sysctl_ctx_list tz_sysctl_ctx; 109 struct sysctl_oid *tz_sysctl_tree; 110 eventhandler_tag tz_event; 111 112 struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/ 113 int tz_validchecks; 114 int tz_insane_tmp_notified; 115 116 /* passive cooling */ 117 struct proc *tz_cooling_proc; 118 int tz_cooling_proc_running; 119 int tz_cooling_enabled; 120 int tz_cooling_active; 121 int tz_cooling_updated; 122 int tz_cooling_saved_freq; 123}; 124 125#define TZ_ACTIVE_LEVEL(act) ((act) >= 0 ? (act) : TZ_NUMLEVELS) 126 127#define CPUFREQ_MAX_LEVELS 64 /* XXX cpufreq should export this */ 128 129static int acpi_tz_probe(device_t dev); 130static int acpi_tz_attach(device_t dev); 131static int acpi_tz_establish(struct acpi_tz_softc *sc); 132static void acpi_tz_monitor(void *Context); 133static void acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg); 134static void acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg); 135static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, 136 int *data); 137static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what); 138static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS); 139static int acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS); 140static int acpi_tz_temp_sysctl(SYSCTL_HANDLER_ARGS); 141static int acpi_tz_passive_sysctl(SYSCTL_HANDLER_ARGS); 142static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, 143 void *context); 144static void acpi_tz_signal(struct acpi_tz_softc *sc, int flags); 145static void acpi_tz_timeout(struct acpi_tz_softc *sc, int flags); 146static void acpi_tz_power_profile(void *arg); 147static void acpi_tz_thread(void *arg); 148static int acpi_tz_cooling_is_available(struct acpi_tz_softc *sc); 149static int acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc); 150 151static device_method_t acpi_tz_methods[] = { 152 /* Device interface */ 153 DEVMETHOD(device_probe, acpi_tz_probe), 154 DEVMETHOD(device_attach, acpi_tz_attach), 155 156 DEVMETHOD_END 157}; 158 159static driver_t acpi_tz_driver = { 160 "acpi_tz", 161 acpi_tz_methods, 162 sizeof(struct acpi_tz_softc), 163}; 164 165static char *acpi_tz_tmp_name = "_TMP"; 166 167static devclass_t acpi_tz_devclass; 168DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, 0, 0); 169MODULE_DEPEND(acpi_tz, acpi, 1, 1, 1); 170 171static struct sysctl_ctx_list acpi_tz_sysctl_ctx; 172static struct sysctl_oid *acpi_tz_sysctl_tree; 173 174/* Minimum cooling run time */ 175static int acpi_tz_min_runtime; 176static int acpi_tz_polling_rate = TZ_POLLRATE; 177static int acpi_tz_override; 178 179/* Timezone polling thread */ 180static struct proc *acpi_tz_proc; 181ACPI_LOCK_DECL(thermal, "ACPI thermal zone"); 182 183static int acpi_tz_cooling_unit = -1; 184 185static int 186acpi_tz_probe(device_t dev) 187{ 188 int result; 189 190 if (acpi_get_type(dev) == ACPI_TYPE_THERMAL && !acpi_disabled("thermal")) { 191 device_set_desc(dev, "Thermal Zone"); 192 result = -10; 193 } else 194 result = ENXIO; 195 return (result); 196} 197 198static int 199acpi_tz_attach(device_t dev) 200{ 201 struct acpi_tz_softc *sc; 202 struct acpi_softc *acpi_sc; 203 int error; 204 char oidname[8]; 205 206 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 207 208 sc = device_get_softc(dev); 209 sc->tz_dev = dev; 210 sc->tz_handle = acpi_get_handle(dev); 211 sc->tz_requested = TZ_ACTIVE_NONE; 212 sc->tz_active = TZ_ACTIVE_UNKNOWN; 213 sc->tz_thflags = TZ_THFLAG_NONE; 214 sc->tz_cooling_proc = NULL; 215 sc->tz_cooling_proc_running = FALSE; 216 sc->tz_cooling_active = FALSE; 217 sc->tz_cooling_updated = FALSE; 218 sc->tz_cooling_enabled = FALSE; 219 220 /* 221 * Parse the current state of the thermal zone and build control 222 * structures. We don't need to worry about interference with the 223 * control thread since we haven't fully attached this device yet. 224 */ 225 if ((error = acpi_tz_establish(sc)) != 0) 226 return (error); 227 228 /* 229 * Register for any Notify events sent to this zone. 230 */ 231 AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY, 232 acpi_tz_notify_handler, sc); 233 234 /* 235 * Create our sysctl nodes. 236 * 237 * XXX we need a mechanism for adding nodes under ACPI. 238 */ 239 if (device_get_unit(dev) == 0) { 240 acpi_sc = acpi_device_get_parent_softc(dev); 241 sysctl_ctx_init(&acpi_tz_sysctl_ctx); 242 acpi_tz_sysctl_tree = SYSCTL_ADD_NODE(&acpi_tz_sysctl_ctx, 243 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), 244 OID_AUTO, "thermal", CTLFLAG_RD, 0, ""); 245 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx, 246 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 247 OID_AUTO, "min_runtime", CTLFLAG_RW, 248 &acpi_tz_min_runtime, 0, 249 "minimum cooling run time in sec"); 250 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx, 251 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 252 OID_AUTO, "polling_rate", CTLFLAG_RW, 253 &acpi_tz_polling_rate, 0, "monitor polling interval in seconds"); 254 SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx, 255 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), OID_AUTO, 256 "user_override", CTLFLAG_RW, &acpi_tz_override, 0, 257 "allow override of thermal settings"); 258 } 259 sysctl_ctx_init(&sc->tz_sysctl_ctx); 260 sprintf(oidname, "tz%d", device_get_unit(dev)); 261 sc->tz_sysctl_tree = SYSCTL_ADD_NODE(&sc->tz_sysctl_ctx, 262 SYSCTL_CHILDREN(acpi_tz_sysctl_tree), 263 OID_AUTO, oidname, CTLFLAG_RD, 0, ""); 264 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 265 OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD, 266 &sc->tz_temperature, 0, sysctl_handle_int, 267 "IK", "current thermal zone temperature"); 268 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 269 OID_AUTO, "active", CTLTYPE_INT | CTLFLAG_RW, 270 sc, 0, acpi_tz_active_sysctl, "I", "cooling is active"); 271 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 272 OID_AUTO, "passive_cooling", CTLTYPE_INT | CTLFLAG_RW, 273 sc, 0, acpi_tz_cooling_sysctl, "I", 274 "enable passive (speed reduction) cooling"); 275 276 SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 277 OID_AUTO, "thermal_flags", CTLFLAG_RD, 278 &sc->tz_thflags, 0, "thermal zone flags"); 279 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 280 OID_AUTO, "_PSV", CTLTYPE_INT | CTLFLAG_RW, 281 sc, offsetof(struct acpi_tz_softc, tz_zone.psv), 282 acpi_tz_temp_sysctl, "IK", "passive cooling temp setpoint"); 283 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 284 OID_AUTO, "_HOT", CTLTYPE_INT | CTLFLAG_RW, 285 sc, offsetof(struct acpi_tz_softc, tz_zone.hot), 286 acpi_tz_temp_sysctl, "IK", 287 "too hot temp setpoint (suspend now)"); 288 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 289 OID_AUTO, "_CRT", CTLTYPE_INT | CTLFLAG_RW, 290 sc, offsetof(struct acpi_tz_softc, tz_zone.crt), 291 acpi_tz_temp_sysctl, "IK", 292 "critical temp setpoint (shutdown now)"); 293 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 294 OID_AUTO, "_ACx", CTLTYPE_INT | CTLFLAG_RD, 295 &sc->tz_zone.ac, sizeof(sc->tz_zone.ac), 296 sysctl_handle_opaque, "IK", ""); 297 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 298 OID_AUTO, "_TC1", CTLTYPE_INT | CTLFLAG_RW, 299 sc, offsetof(struct acpi_tz_softc, tz_zone.tc1), 300 acpi_tz_passive_sysctl, "I", 301 "thermal constant 1 for passive cooling"); 302 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 303 OID_AUTO, "_TC2", CTLTYPE_INT | CTLFLAG_RW, 304 sc, offsetof(struct acpi_tz_softc, tz_zone.tc2), 305 acpi_tz_passive_sysctl, "I", 306 "thermal constant 2 for passive cooling"); 307 SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), 308 OID_AUTO, "_TSP", CTLTYPE_INT | CTLFLAG_RW, 309 sc, offsetof(struct acpi_tz_softc, tz_zone.tsp), 310 acpi_tz_passive_sysctl, "I", 311 "thermal sampling period for passive cooling"); 312 313 /* 314 * Create thread to service all of the thermal zones. Register 315 * our power profile event handler. 316 */ 317 sc->tz_event = EVENTHANDLER_REGISTER(power_profile_change, 318 acpi_tz_power_profile, sc, 0); 319 if (acpi_tz_proc == NULL) { 320 error = kproc_create(acpi_tz_thread, NULL, &acpi_tz_proc, 321 RFHIGHPID, 0, "acpi_thermal"); 322 if (error != 0) { 323 device_printf(sc->tz_dev, "could not create thread - %d", error); 324 goto out; 325 } 326 } 327 328 /* 329 * Create a thread to handle passive cooling for 1st zone which 330 * has _PSV, _TSP, _TC1 and _TC2. Users can enable it for other 331 * zones manually for now. 332 * 333 * XXX We enable only one zone to avoid multiple zones conflict 334 * with each other since cpufreq currently sets all CPUs to the 335 * given frequency whereas it's possible for different thermal 336 * zones to specify independent settings for multiple CPUs. 337 */ 338 if (acpi_tz_cooling_unit < 0 && acpi_tz_cooling_is_available(sc)) 339 sc->tz_cooling_enabled = TRUE; 340 if (sc->tz_cooling_enabled) { 341 error = acpi_tz_cooling_thread_start(sc); 342 if (error != 0) { 343 sc->tz_cooling_enabled = FALSE; 344 goto out; 345 } 346 acpi_tz_cooling_unit = device_get_unit(dev); 347 } 348 349 /* 350 * Flag the event handler for a manual invocation by our timeout. 351 * We defer it like this so that the rest of the subsystem has time 352 * to come up. Don't bother evaluating/printing the temperature at 353 * this point; on many systems it'll be bogus until the EC is running. 354 */ 355 sc->tz_flags |= TZ_FLAG_GETPROFILE; 356 357out: 358 if (error != 0) { 359 EVENTHANDLER_DEREGISTER(power_profile_change, sc->tz_event); 360 AcpiRemoveNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY, 361 acpi_tz_notify_handler); 362 sysctl_ctx_free(&sc->tz_sysctl_ctx); 363 } 364 return_VALUE (error); 365} 366 367/* 368 * Parse the current state of this thermal zone and set up to use it. 369 * 370 * Note that we may have previous state, which will have to be discarded. 371 */ 372static int 373acpi_tz_establish(struct acpi_tz_softc *sc) 374{ 375 ACPI_OBJECT *obj; 376 int i; 377 char nbuf[8]; 378 379 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 380 381 /* Erase any existing state. */ 382 for (i = 0; i < TZ_NUMLEVELS; i++) 383 if (sc->tz_zone.al[i].Pointer != NULL) 384 AcpiOsFree(sc->tz_zone.al[i].Pointer); 385 if (sc->tz_zone.psl.Pointer != NULL) 386 AcpiOsFree(sc->tz_zone.psl.Pointer); 387 388 /* 389 * XXX: We initialize only ACPI_BUFFER to avoid race condition 390 * with passive cooling thread which refers psv, tc1, tc2 and tsp. 391 */ 392 bzero(sc->tz_zone.ac, sizeof(sc->tz_zone.ac)); 393 bzero(sc->tz_zone.al, sizeof(sc->tz_zone.al)); 394 bzero(&sc->tz_zone.psl, sizeof(sc->tz_zone.psl)); 395 396 /* Evaluate thermal zone parameters. */ 397 for (i = 0; i < TZ_NUMLEVELS; i++) { 398 sprintf(nbuf, "_AC%d", i); 399 acpi_tz_getparam(sc, nbuf, &sc->tz_zone.ac[i]); 400 sprintf(nbuf, "_AL%d", i); 401 sc->tz_zone.al[i].Length = ACPI_ALLOCATE_BUFFER; 402 sc->tz_zone.al[i].Pointer = NULL; 403 AcpiEvaluateObject(sc->tz_handle, nbuf, NULL, &sc->tz_zone.al[i]); 404 obj = (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer; 405 if (obj != NULL) { 406 /* Should be a package containing a list of power objects */ 407 if (obj->Type != ACPI_TYPE_PACKAGE) { 408 device_printf(sc->tz_dev, "%s has unknown type %d, rejecting\n", 409 nbuf, obj->Type); 410 return_VALUE (ENXIO); 411 } 412 } 413 } 414 acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt); 415 acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot); 416 sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER; 417 sc->tz_zone.psl.Pointer = NULL; 418 AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl); 419 acpi_tz_getparam(sc, "_PSV", &sc->tz_zone.psv); 420 acpi_tz_getparam(sc, "_TC1", &sc->tz_zone.tc1); 421 acpi_tz_getparam(sc, "_TC2", &sc->tz_zone.tc2); 422 acpi_tz_getparam(sc, "_TSP", &sc->tz_zone.tsp); 423 acpi_tz_getparam(sc, "_TZP", &sc->tz_zone.tzp); 424 425 /* 426 * Sanity-check the values we've been given. 427 * 428 * XXX what do we do about systems that give us the same value for 429 * more than one of these setpoints? 430 */ 431 acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT"); 432 acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT"); 433 acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV"); 434 for (i = 0; i < TZ_NUMLEVELS; i++) 435 acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx"); 436 437 return_VALUE (0); 438} 439 440static char *aclevel_string[] = { 441 "NONE", "_AC0", "_AC1", "_AC2", "_AC3", "_AC4", 442 "_AC5", "_AC6", "_AC7", "_AC8", "_AC9" 443}; 444 445static __inline const char * 446acpi_tz_aclevel_string(int active) 447{ 448 if (active < -1 || active >= TZ_NUMLEVELS) 449 return (aclevel_string[0]); 450 451 return (aclevel_string[active + 1]); 452} 453 454/* 455 * Get the current temperature. 456 */ 457static int 458acpi_tz_get_temperature(struct acpi_tz_softc *sc) 459{ 460 int temp; 461 ACPI_STATUS status; 462 463 ACPI_FUNCTION_NAME ("acpi_tz_get_temperature"); 464 465 /* Evaluate the thermal zone's _TMP method. */ 466 status = acpi_GetInteger(sc->tz_handle, acpi_tz_tmp_name, &temp); 467 if (ACPI_FAILURE(status)) { 468 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 469 "error fetching current temperature -- %s\n", 470 AcpiFormatException(status)); 471 return (FALSE); 472 } 473 474 /* Check it for validity. */ 475 acpi_tz_sanity(sc, &temp, acpi_tz_tmp_name); 476 if (temp == -1) 477 return (FALSE); 478 479 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp))); 480 sc->tz_temperature = temp; 481 return (TRUE); 482} 483 484/* 485 * Evaluate the condition of a thermal zone, take appropriate actions. 486 */ 487static void 488acpi_tz_monitor(void *Context) 489{ 490 struct acpi_tz_softc *sc; 491 struct timespec curtime; 492 int temp; 493 int i; 494 int newactive, newflags; 495 496 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 497 498 sc = (struct acpi_tz_softc *)Context; 499 500 /* Get the current temperature. */ 501 if (!acpi_tz_get_temperature(sc)) { 502 /* XXX disable zone? go to max cooling? */ 503 return_VOID; 504 } 505 temp = sc->tz_temperature; 506 507 /* 508 * Work out what we ought to be doing right now. 509 * 510 * Note that the _ACx levels sort from hot to cold. 511 */ 512 newactive = TZ_ACTIVE_NONE; 513 for (i = TZ_NUMLEVELS - 1; i >= 0; i--) { 514 if (sc->tz_zone.ac[i] != -1 && temp >= sc->tz_zone.ac[i]) 515 newactive = i; 516 } 517 518 /* 519 * We are going to get _ACx level down (colder side), but give a guaranteed 520 * minimum cooling run time if requested. 521 */ 522 if (acpi_tz_min_runtime > 0 && sc->tz_active != TZ_ACTIVE_NONE && 523 sc->tz_active != TZ_ACTIVE_UNKNOWN && 524 (newactive == TZ_ACTIVE_NONE || newactive > sc->tz_active)) { 525 526 getnanotime(&curtime); 527 timespecsub(&curtime, &sc->tz_cooling_started); 528 if (curtime.tv_sec < acpi_tz_min_runtime) 529 newactive = sc->tz_active; 530 } 531 532 /* Handle user override of active mode */ 533 if (sc->tz_requested != TZ_ACTIVE_NONE && (newactive == TZ_ACTIVE_NONE 534 || sc->tz_requested < newactive)) 535 newactive = sc->tz_requested; 536 537 /* update temperature-related flags */ 538 newflags = TZ_THFLAG_NONE; 539 if (sc->tz_zone.psv != -1 && temp >= sc->tz_zone.psv) 540 newflags |= TZ_THFLAG_PSV; 541 if (sc->tz_zone.hot != -1 && temp >= sc->tz_zone.hot) 542 newflags |= TZ_THFLAG_HOT; 543 if (sc->tz_zone.crt != -1 && temp >= sc->tz_zone.crt) 544 newflags |= TZ_THFLAG_CRT; 545 546 /* If the active cooling state has changed, we have to switch things. */ 547 if (sc->tz_active == TZ_ACTIVE_UNKNOWN) { 548 /* 549 * We don't know which cooling device is on or off, 550 * so stop them all, because we now know which 551 * should be on (if any). 552 */ 553 for (i = 0; i < TZ_NUMLEVELS; i++) { 554 if (sc->tz_zone.al[i].Pointer != NULL) { 555 acpi_ForeachPackageObject( 556 (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer, 557 acpi_tz_switch_cooler_off, sc); 558 } 559 } 560 /* now we know that all devices are off */ 561 sc->tz_active = TZ_ACTIVE_NONE; 562 } 563 564 if (newactive != sc->tz_active) { 565 /* Turn off unneeded cooling devices that are on, if any are */ 566 for (i = TZ_ACTIVE_LEVEL(sc->tz_active); 567 i < TZ_ACTIVE_LEVEL(newactive); i++) { 568 acpi_ForeachPackageObject( 569 (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer, 570 acpi_tz_switch_cooler_off, sc); 571 } 572 /* Turn on cooling devices that are required, if any are */ 573 for (i = TZ_ACTIVE_LEVEL(sc->tz_active) - 1; 574 i >= TZ_ACTIVE_LEVEL(newactive); i--) { 575 acpi_ForeachPackageObject( 576 (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer, 577 acpi_tz_switch_cooler_on, sc); 578 } 579 580 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 581 "switched from %s to %s: %d.%dC\n", 582 acpi_tz_aclevel_string(sc->tz_active), 583 acpi_tz_aclevel_string(newactive), TZ_KELVTOC(temp)); 584 sc->tz_active = newactive; 585 getnanotime(&sc->tz_cooling_started); 586 } 587 588 /* XXX (de)activate any passive cooling that may be required. */ 589 590 /* 591 * If the temperature is at _HOT or _CRT, increment our event count. 592 * If it has occurred enough times, shutdown the system. This is 593 * needed because some systems will report an invalid high temperature 594 * for one poll cycle. It is suspected this is due to the embedded 595 * controller timing out. A typical value is 138C for one cycle on 596 * a system that is otherwise 65C. 597 * 598 * If we're almost at that threshold, notify the user through devd(8). 599 */ 600 if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) { 601 sc->tz_validchecks++; 602 if (sc->tz_validchecks == TZ_VALIDCHECKS) { 603 device_printf(sc->tz_dev, 604 "WARNING - current temperature (%d.%dC) exceeds safe limits\n", 605 TZ_KELVTOC(sc->tz_temperature)); 606 shutdown_nice(RB_POWEROFF); 607 } else if (sc->tz_validchecks == TZ_NOTIFYCOUNT) 608 acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL); 609 } else { 610 sc->tz_validchecks = 0; 611 } 612 sc->tz_thflags = newflags; 613 614 return_VOID; 615} 616 617/* 618 * Given an object, verify that it's a reference to a device of some sort, 619 * and try to switch it off. 620 */ 621static void 622acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg) 623{ 624 ACPI_HANDLE cooler; 625 626 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 627 628 cooler = acpi_GetReference(NULL, obj); 629 if (cooler == NULL) { 630 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); 631 return_VOID; 632 } 633 634 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s off\n", 635 acpi_name(cooler))); 636 acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3); 637 638 return_VOID; 639} 640 641/* 642 * Given an object, verify that it's a reference to a device of some sort, 643 * and try to switch it on. 644 * 645 * XXX replication of off/on function code is bad. 646 */ 647static void 648acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg) 649{ 650 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; 651 ACPI_HANDLE cooler; 652 ACPI_STATUS status; 653 654 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 655 656 cooler = acpi_GetReference(NULL, obj); 657 if (cooler == NULL) { 658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); 659 return_VOID; 660 } 661 662 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s on\n", 663 acpi_name(cooler))); 664 status = acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0); 665 if (ACPI_FAILURE(status)) { 666 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 667 "failed to activate %s - %s\n", acpi_name(cooler), 668 AcpiFormatException(status)); 669 } 670 671 return_VOID; 672} 673 674/* 675 * Read/debug-print a parameter, default it to -1. 676 */ 677static void 678acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data) 679{ 680 681 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 682 683 if (ACPI_FAILURE(acpi_GetInteger(sc->tz_handle, node, data))) { 684 *data = -1; 685 } else { 686 ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "%s.%s = %d\n", 687 acpi_name(sc->tz_handle), node, *data)); 688 } 689 690 return_VOID; 691} 692 693/* 694 * Sanity-check a temperature value. Assume that setpoints 695 * should be between 0C and 200C. 696 */ 697static void 698acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what) 699{ 700 if (*val != -1 && (*val < TZ_ZEROC || *val > TZ_ZEROC + 2000)) { 701 /* 702 * If the value we are checking is _TMP, warn the user only 703 * once. This avoids spamming messages if, for instance, the 704 * sensor is broken and always returns an invalid temperature. 705 * 706 * This is only done for _TMP; other values always emit a 707 * warning. 708 */ 709 if (what != acpi_tz_tmp_name || !sc->tz_insane_tmp_notified) { 710 device_printf(sc->tz_dev, "%s value is absurd, ignored (%d.%dC)\n", 711 what, TZ_KELVTOC(*val)); 712 713 /* Don't warn the user again if the read value doesn't improve. */ 714 if (what == acpi_tz_tmp_name) 715 sc->tz_insane_tmp_notified = 1; 716 } 717 *val = -1; 718 return; 719 } 720 721 /* This value is correct. Warn if it's incorrect again. */ 722 if (what == acpi_tz_tmp_name) 723 sc->tz_insane_tmp_notified = 0; 724} 725 726/* 727 * Respond to a sysctl on the active state node. 728 */ 729static int 730acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS) 731{ 732 struct acpi_tz_softc *sc; 733 int active; 734 int error; 735 736 sc = (struct acpi_tz_softc *)oidp->oid_arg1; 737 active = sc->tz_active; 738 error = sysctl_handle_int(oidp, &active, 0, req); 739 740 /* Error or no new value */ 741 if (error != 0 || req->newptr == NULL) 742 return (error); 743 if (active < -1 || active >= TZ_NUMLEVELS) 744 return (EINVAL); 745 746 /* Set new preferred level and re-switch */ 747 sc->tz_requested = active; 748 acpi_tz_signal(sc, 0); 749 return (0); 750} 751 752static int 753acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS) 754{ 755 struct acpi_tz_softc *sc; 756 int enabled, error; 757 758 sc = (struct acpi_tz_softc *)oidp->oid_arg1; 759 enabled = sc->tz_cooling_enabled; 760 error = sysctl_handle_int(oidp, &enabled, 0, req); 761 762 /* Error or no new value */ 763 if (error != 0 || req->newptr == NULL) 764 return (error); 765 if (enabled != TRUE && enabled != FALSE) 766 return (EINVAL); 767 768 if (enabled) { 769 if (acpi_tz_cooling_is_available(sc)) 770 error = acpi_tz_cooling_thread_start(sc); 771 else 772 error = ENODEV; 773 if (error) 774 enabled = FALSE; 775 } 776 sc->tz_cooling_enabled = enabled; 777 return (error); 778} 779 780static int 781acpi_tz_temp_sysctl(SYSCTL_HANDLER_ARGS) 782{ 783 struct acpi_tz_softc *sc; 784 int temp, *temp_ptr; 785 int error; 786 787 sc = oidp->oid_arg1; 788 temp_ptr = (int *)((uintptr_t)sc + oidp->oid_arg2); 789 temp = *temp_ptr; 790 error = sysctl_handle_int(oidp, &temp, 0, req); 791 792 /* Error or no new value */ 793 if (error != 0 || req->newptr == NULL) 794 return (error); 795 796 /* Only allow changing settings if override is set. */ 797 if (!acpi_tz_override) 798 return (EPERM); 799 800 /* Check user-supplied value for sanity. */ 801 acpi_tz_sanity(sc, &temp, "user-supplied temp"); 802 if (temp == -1) 803 return (EINVAL); 804 805 *temp_ptr = temp; 806 return (0); 807} 808 809static int 810acpi_tz_passive_sysctl(SYSCTL_HANDLER_ARGS) 811{ 812 struct acpi_tz_softc *sc; 813 int val, *val_ptr; 814 int error; 815 816 sc = oidp->oid_arg1; 817 val_ptr = (int *)((uintptr_t)sc + oidp->oid_arg2); 818 val = *val_ptr; 819 error = sysctl_handle_int(oidp, &val, 0, req); 820 821 /* Error or no new value */ 822 if (error != 0 || req->newptr == NULL) 823 return (error); 824 825 /* Only allow changing settings if override is set. */ 826 if (!acpi_tz_override) 827 return (EPERM); 828 829 *val_ptr = val; 830 return (0); 831} 832 833static void 834acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) 835{ 836 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)context; 837 838 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 839 840 switch (notify) { 841 case TZ_NOTIFY_TEMPERATURE: 842 /* Temperature change occurred */ 843 acpi_tz_signal(sc, 0); 844 break; 845 case TZ_NOTIFY_DEVICES: 846 case TZ_NOTIFY_LEVELS: 847 /* Zone devices/setpoints changed */ 848 acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS); 849 break; 850 default: 851 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 852 "unknown Notify event 0x%x\n", notify); 853 break; 854 } 855 856 acpi_UserNotify("Thermal", h, notify); 857 858 return_VOID; 859} 860 861static void 862acpi_tz_signal(struct acpi_tz_softc *sc, int flags) 863{ 864 ACPI_LOCK(thermal); 865 sc->tz_flags |= flags; 866 ACPI_UNLOCK(thermal); 867 wakeup(&acpi_tz_proc); 868} 869 870/* 871 * Notifies can be generated asynchronously but have also been seen to be 872 * triggered by other thermal methods. One system generates a notify of 873 * 0x81 when the fan is turned on or off. Another generates it when _SCP 874 * is called. To handle these situations, we check the zone via 875 * acpi_tz_monitor() before evaluating changes to setpoints or the cooling 876 * policy. 877 */ 878static void 879acpi_tz_timeout(struct acpi_tz_softc *sc, int flags) 880{ 881 882 /* Check the current temperature and take action based on it */ 883 acpi_tz_monitor(sc); 884 885 /* If requested, get the power profile settings. */ 886 if (flags & TZ_FLAG_GETPROFILE) 887 acpi_tz_power_profile(sc); 888 889 /* 890 * If requested, check for new devices/setpoints. After finding them, 891 * check if we need to switch fans based on the new values. 892 */ 893 if (flags & TZ_FLAG_GETSETTINGS) { 894 acpi_tz_establish(sc); 895 acpi_tz_monitor(sc); 896 } 897 898 /* XXX passive cooling actions? */ 899} 900 901/* 902 * System power profile may have changed; fetch and notify the 903 * thermal zone accordingly. 904 * 905 * Since this can be called from an arbitrary eventhandler, it needs 906 * to get the ACPI lock itself. 907 */ 908static void 909acpi_tz_power_profile(void *arg) 910{ 911 ACPI_STATUS status; 912 struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; 913 int state; 914 915 state = power_profile_get_state(); 916 if (state != POWER_PROFILE_PERFORMANCE && state != POWER_PROFILE_ECONOMY) 917 return; 918 919 /* check that we haven't decided there's no _SCP method */ 920 if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) { 921 922 /* Call _SCP to set the new profile */ 923 status = acpi_SetInteger(sc->tz_handle, "_SCP", 924 (state == POWER_PROFILE_PERFORMANCE) ? 0 : 1); 925 if (ACPI_FAILURE(status)) { 926 if (status != AE_NOT_FOUND) 927 ACPI_VPRINT(sc->tz_dev, 928 acpi_device_get_parent_softc(sc->tz_dev), 929 "can't evaluate %s._SCP - %s\n", 930 acpi_name(sc->tz_handle), 931 AcpiFormatException(status)); 932 sc->tz_flags |= TZ_FLAG_NO_SCP; 933 } else { 934 /* We have to re-evaluate the entire zone now */ 935 acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS); 936 } 937 } 938} 939 940/* 941 * Thermal zone monitor thread. 942 */ 943static void 944acpi_tz_thread(void *arg) 945{ 946 device_t *devs; 947 int devcount, i; 948 int flags; 949 struct acpi_tz_softc **sc; 950 951 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 952 953 devs = NULL; 954 devcount = 0; 955 sc = NULL; 956 957 for (;;) { 958 /* If the number of devices has changed, re-evaluate. */ 959 if (devclass_get_count(acpi_tz_devclass) != devcount) { 960 if (devs != NULL) { 961 free(devs, M_TEMP); 962 free(sc, M_TEMP); 963 } 964 devclass_get_devices(acpi_tz_devclass, &devs, &devcount); 965 sc = malloc(sizeof(struct acpi_tz_softc *) * devcount, M_TEMP, 966 M_WAITOK | M_ZERO); 967 for (i = 0; i < devcount; i++) 968 sc[i] = device_get_softc(devs[i]); 969 } 970 971 /* Check for temperature events and act on them. */ 972 for (i = 0; i < devcount; i++) { 973 ACPI_LOCK(thermal); 974 flags = sc[i]->tz_flags; 975 sc[i]->tz_flags &= TZ_FLAG_NO_SCP; 976 ACPI_UNLOCK(thermal); 977 acpi_tz_timeout(sc[i], flags); 978 } 979 980 /* If more work to do, don't go to sleep yet. */ 981 ACPI_LOCK(thermal); 982 for (i = 0; i < devcount; i++) { 983 if (sc[i]->tz_flags & ~TZ_FLAG_NO_SCP) 984 break; 985 } 986 987 /* 988 * If we have no more work, sleep for a while, setting PDROP so that 989 * the mutex will not be reacquired. Otherwise, drop the mutex and 990 * loop to handle more events. 991 */ 992 if (i == devcount) 993 msleep(&acpi_tz_proc, &thermal_mutex, PZERO | PDROP, "tzpoll", 994 hz * acpi_tz_polling_rate); 995 else 996 ACPI_UNLOCK(thermal); 997 } 998} 999 1000static int 1001acpi_tz_cpufreq_restore(struct acpi_tz_softc *sc) 1002{ 1003 device_t dev; 1004 int error; 1005 1006 if (!sc->tz_cooling_updated) 1007 return (0); 1008 if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL) 1009 return (ENXIO); 1010 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 1011 "temperature %d.%dC: resuming previous clock speed (%d MHz)\n", 1012 TZ_KELVTOC(sc->tz_temperature), sc->tz_cooling_saved_freq); 1013 error = CPUFREQ_SET(dev, NULL, CPUFREQ_PRIO_KERN); 1014 if (error == 0) 1015 sc->tz_cooling_updated = FALSE; 1016 return (error); 1017} 1018 1019static int 1020acpi_tz_cpufreq_update(struct acpi_tz_softc *sc, int req) 1021{ 1022 device_t dev; 1023 struct cf_level *levels; 1024 int num_levels, error, freq, desired_freq, perf, i; 1025 1026 levels = malloc(CPUFREQ_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT); 1027 if (levels == NULL) 1028 return (ENOMEM); 1029 1030 /* 1031 * Find the main device, cpufreq0. We don't yet support independent 1032 * CPU frequency control on SMP. 1033 */ 1034 if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL) { 1035 error = ENXIO; 1036 goto out; 1037 } 1038 1039 /* Get the current frequency. */ 1040 error = CPUFREQ_GET(dev, &levels[0]); 1041 if (error) 1042 goto out; 1043 freq = levels[0].total_set.freq; 1044 1045 /* Get the current available frequency levels. */ 1046 num_levels = CPUFREQ_MAX_LEVELS; 1047 error = CPUFREQ_LEVELS(dev, levels, &num_levels); 1048 if (error) { 1049 if (error == E2BIG) 1050 printf("cpufreq: need to increase CPUFREQ_MAX_LEVELS\n"); 1051 goto out; 1052 } 1053 1054 /* Calculate the desired frequency as a percent of the max frequency. */ 1055 perf = 100 * freq / levels[0].total_set.freq - req; 1056 if (perf < 0) 1057 perf = 0; 1058 else if (perf > 100) 1059 perf = 100; 1060 desired_freq = levels[0].total_set.freq * perf / 100; 1061 1062 if (desired_freq < freq) { 1063 /* Find the closest available frequency, rounding down. */ 1064 for (i = 0; i < num_levels; i++) 1065 if (levels[i].total_set.freq <= desired_freq) 1066 break; 1067 1068 /* If we didn't find a relevant setting, use the lowest. */ 1069 if (i == num_levels) 1070 i--; 1071 } else { 1072 /* If we didn't decrease frequency yet, don't increase it. */ 1073 if (!sc->tz_cooling_updated) { 1074 sc->tz_cooling_active = FALSE; 1075 goto out; 1076 } 1077 1078 /* Use saved cpu frequency as maximum value. */ 1079 if (desired_freq > sc->tz_cooling_saved_freq) 1080 desired_freq = sc->tz_cooling_saved_freq; 1081 1082 /* Find the closest available frequency, rounding up. */ 1083 for (i = num_levels - 1; i >= 0; i--) 1084 if (levels[i].total_set.freq >= desired_freq) 1085 break; 1086 1087 /* If we didn't find a relevant setting, use the highest. */ 1088 if (i == -1) 1089 i++; 1090 1091 /* If we're going to the highest frequency, restore the old setting. */ 1092 if (i == 0 || desired_freq == sc->tz_cooling_saved_freq) { 1093 error = acpi_tz_cpufreq_restore(sc); 1094 if (error == 0) 1095 sc->tz_cooling_active = FALSE; 1096 goto out; 1097 } 1098 } 1099 1100 /* If we are going to a new frequency, activate it. */ 1101 if (levels[i].total_set.freq != freq) { 1102 ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), 1103 "temperature %d.%dC: %screasing clock speed " 1104 "from %d MHz to %d MHz\n", 1105 TZ_KELVTOC(sc->tz_temperature), 1106 (freq > levels[i].total_set.freq) ? "de" : "in", 1107 freq, levels[i].total_set.freq); 1108 error = CPUFREQ_SET(dev, &levels[i], CPUFREQ_PRIO_KERN); 1109 if (error == 0 && !sc->tz_cooling_updated) { 1110 sc->tz_cooling_saved_freq = freq; 1111 sc->tz_cooling_updated = TRUE; 1112 } 1113 } 1114 1115out: 1116 if (levels) 1117 free(levels, M_TEMP); 1118 return (error); 1119} 1120 1121/* 1122 * Passive cooling thread; monitors current temperature according to the 1123 * cooling interval and calculates whether to scale back CPU frequency. 1124 */ 1125static void 1126acpi_tz_cooling_thread(void *arg) 1127{ 1128 struct acpi_tz_softc *sc; 1129 int error, perf, curr_temp, prev_temp; 1130 1131 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1132 1133 sc = (struct acpi_tz_softc *)arg; 1134 1135 prev_temp = sc->tz_temperature; 1136 while (sc->tz_cooling_enabled) { 1137 if (sc->tz_cooling_active) 1138 (void)acpi_tz_get_temperature(sc); 1139 curr_temp = sc->tz_temperature; 1140 if (curr_temp >= sc->tz_zone.psv) 1141 sc->tz_cooling_active = TRUE; 1142 if (sc->tz_cooling_active) { 1143 perf = sc->tz_zone.tc1 * (curr_temp - prev_temp) + 1144 sc->tz_zone.tc2 * (curr_temp - sc->tz_zone.psv); 1145 perf /= 10; 1146 1147 if (perf != 0) { 1148 error = acpi_tz_cpufreq_update(sc, perf); 1149 1150 /* 1151 * If error and not simply a higher priority setting was 1152 * active, disable cooling. 1153 */ 1154 if (error != 0 && error != EPERM) { 1155 device_printf(sc->tz_dev, 1156 "failed to set new freq, disabling passive cooling\n"); 1157 sc->tz_cooling_enabled = FALSE; 1158 } 1159 } 1160 } 1161 prev_temp = curr_temp; 1162 tsleep(&sc->tz_cooling_proc, PZERO, "cooling", 1163 hz * sc->tz_zone.tsp / 10); 1164 } 1165 if (sc->tz_cooling_active) { 1166 acpi_tz_cpufreq_restore(sc); 1167 sc->tz_cooling_active = FALSE; 1168 } 1169 sc->tz_cooling_proc = NULL; 1170 ACPI_LOCK(thermal); 1171 sc->tz_cooling_proc_running = FALSE; 1172 ACPI_UNLOCK(thermal); 1173 kproc_exit(0); 1174} 1175 1176/* 1177 * TODO: We ignore _PSL (list of cooling devices) since cpufreq enumerates 1178 * all CPUs for us. However, it's possible in the future _PSL will 1179 * reference non-CPU devices so we may want to support it then. 1180 */ 1181static int 1182acpi_tz_cooling_is_available(struct acpi_tz_softc *sc) 1183{ 1184 return (sc->tz_zone.tc1 != -1 && sc->tz_zone.tc2 != -1 && 1185 sc->tz_zone.tsp != -1 && sc->tz_zone.tsp != 0 && 1186 sc->tz_zone.psv != -1); 1187} 1188 1189static int 1190acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc) 1191{ 1192 int error; 1193 1194 ACPI_LOCK(thermal); 1195 if (sc->tz_cooling_proc_running) { 1196 ACPI_UNLOCK(thermal); 1197 return (0); 1198 } 1199 sc->tz_cooling_proc_running = TRUE; 1200 ACPI_UNLOCK(thermal); 1201 error = 0; 1202 if (sc->tz_cooling_proc == NULL) { 1203 error = kproc_create(acpi_tz_cooling_thread, sc, 1204 &sc->tz_cooling_proc, RFHIGHPID, 0, "acpi_cooling%d", 1205 device_get_unit(sc->tz_dev)); 1206 if (error != 0) { 1207 device_printf(sc->tz_dev, "could not create thread - %d", error); 1208 ACPI_LOCK(thermal); 1209 sc->tz_cooling_proc_running = FALSE; 1210 ACPI_UNLOCK(thermal); 1211 } 1212 } 1213 return (error); 1214} 1215