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