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