| 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 | * $FreeBSD: src/sys/dev/acpica/acpi_thermal.c,v 1.73 2009/08/20 19:17:53 jhb |
| 28 | */ |
| 29 | |
| 30 | #include "opt_acpi.h" |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/kernel.h> |
| 33 | #include <sys/bus.h> |
| 34 | #include <sys/kthread.h> |
| 35 | #include <sys/malloc.h> |
| 36 | #include <sys/module.h> |
| 37 | #include <sys/bus.h> |
| 38 | #include <sys/proc.h> |
| 39 | #include <sys/reboot.h> |
| 40 | #include <sys/sysctl.h> |
| 41 | #include <sys/unistd.h> |
| 42 | #include <sys/power.h> |
| 43 | #include <sys/sensors.h> |
| 44 | |
| 45 | #include <sys/mplock2.h> |
| 46 | |
| 47 | #include "acpi.h" |
| 48 | #include "accommon.h" |
| 49 | |
| 50 | #include <dev/acpica5/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 | #define abs(x) ( x < 0 ? -x : x ) |
| 74 | |
| 75 | /* ACPI spec defines this */ |
| 76 | #define TZ_NUMLEVELS 10 |
| 77 | struct acpi_tz_zone { |
| 78 | int ac[TZ_NUMLEVELS]; |
| 79 | ACPI_BUFFER al[TZ_NUMLEVELS]; |
| 80 | int crt; |
| 81 | int hot; |
| 82 | ACPI_BUFFER psl; |
| 83 | int psv; |
| 84 | int tc1; |
| 85 | int tc2; |
| 86 | int tsp; |
| 87 | int tzp; |
| 88 | }; |
| 89 | |
| 90 | struct acpi_tz_softc { |
| 91 | device_t tz_dev; |
| 92 | ACPI_HANDLE tz_handle; /*Thermal zone handle*/ |
| 93 | int tz_temperature; /*Current temperature*/ |
| 94 | int tz_active; /*Current active cooling*/ |
| 95 | #define TZ_ACTIVE_NONE -1 |
| 96 | #define TZ_ACTIVE_UNKNOWN -2 |
| 97 | int tz_requested; /*Minimum active cooling*/ |
| 98 | int tz_thflags; /*Current temp-related flags*/ |
| 99 | #define TZ_THFLAG_NONE 0 |
| 100 | #define TZ_THFLAG_PSV (1<<0) |
| 101 | #define TZ_THFLAG_HOT (1<<2) |
| 102 | #define TZ_THFLAG_CRT (1<<3) |
| 103 | int tz_flags; |
| 104 | #define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/ |
| 105 | #define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/ |
| 106 | #define TZ_FLAG_GETSETTINGS (1<<2) /*Get devs/setpoints*/ |
| 107 | struct timespec tz_cooling_started; |
| 108 | /*Current cooling starting time*/ |
| 109 | |
| 110 | struct sysctl_ctx_list tz_sysctl_ctx; |
| 111 | struct sysctl_oid *tz_sysctl_tree; |
| 112 | eventhandler_tag tz_event; |
| 113 | |
| 114 | struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/ |
| 115 | int tz_validchecks; |
| 116 | |
| 117 | /* passive cooling */ |
| 118 | struct thread *tz_cooling_proc; |
| 119 | int tz_cooling_proc_running; |
| 120 | int tz_cooling_enabled; |
| 121 | int tz_cooling_active; |
| 122 | int tz_cooling_updated; |
| 123 | int tz_cooling_saved_freq; |
| 124 | /* sensors(9) related */ |
| 125 | struct ksensordev sensordev; |
| 126 | struct ksensor sensor; |
| 127 | }; |
| 128 | |
| 129 | #define CPUFREQ_MAX_LEVELS 64 /* XXX cpufreq should export this */ |
| 130 | |
| 131 | static int acpi_tz_probe(device_t dev); |
| 132 | static int acpi_tz_attach(device_t dev); |
| 133 | static int acpi_tz_establish(struct acpi_tz_softc *sc); |
| 134 | static void acpi_tz_monitor(void *Context); |
| 135 | static void acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg); |
| 136 | static void acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg); |
| 137 | static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, |
| 138 | int *data); |
| 139 | static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what); |
| 140 | static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS); |
| 141 | static int acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS); |
| 142 | static int acpi_tz_temp_sysctl(SYSCTL_HANDLER_ARGS); |
| 143 | static int acpi_tz_passive_sysctl(SYSCTL_HANDLER_ARGS); |
| 144 | static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, |
| 145 | void *context); |
| 146 | static void acpi_tz_signal(struct acpi_tz_softc *sc, int flags); |
| 147 | static void acpi_tz_timeout(struct acpi_tz_softc *sc, int flags); |
| 148 | static void acpi_tz_power_profile(void *arg); |
| 149 | static void acpi_tz_thread(void *arg); |
| 150 | static int acpi_tz_cooling_is_available(struct acpi_tz_softc *sc); |
| 151 | static int acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc); |
| 152 | |
| 153 | static device_method_t acpi_tz_methods[] = { |
| 154 | /* Device interface */ |
| 155 | DEVMETHOD(device_probe, acpi_tz_probe), |
| 156 | DEVMETHOD(device_attach, acpi_tz_attach), |
| 157 | |
| 158 | {0, 0} |
| 159 | }; |
| 160 | |
| 161 | static driver_t acpi_tz_driver = { |
| 162 | "acpi_tz", |
| 163 | acpi_tz_methods, |
| 164 | sizeof(struct acpi_tz_softc), |
| 165 | }; |
| 166 | |
| 167 | static devclass_t acpi_tz_devclass; |
| 168 | DRIVER_MODULE(acpi_tz, acpi, acpi_tz_driver, acpi_tz_devclass, NULL, NULL); |
| 169 | MODULE_DEPEND(acpi_tz, acpi, 1, 1, 1); |
| 170 | |
| 171 | static struct sysctl_ctx_list acpi_tz_sysctl_ctx; |
| 172 | static struct sysctl_oid *acpi_tz_sysctl_tree; |
| 173 | |
| 174 | /* Minimum cooling run time */ |
| 175 | static int acpi_tz_min_runtime; |
| 176 | static int acpi_tz_polling_rate = TZ_POLLRATE; |
| 177 | static int acpi_tz_override; |
| 178 | |
| 179 | /* Timezone polling thread */ |
| 180 | static struct thread *acpi_tz_td; |
| 181 | ACPI_LOCK_DECL(thermal, "ACPI thermal zone"); |
| 182 | |
| 183 | static int acpi_tz_cooling_unit = -1; |
| 184 | |
| 185 | static int |
| 186 | acpi_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 | |
| 198 | static int |
| 199 | acpi_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 rate"); |
| 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 | ksprintf(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_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), |
| 265 | OID_AUTO, "temperature", CTLFLAG_RD, &sc->tz_temperature, |
| 266 | sizeof(sc->tz_temperature), "IK", |
| 267 | "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_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), |
| 294 | OID_AUTO, "_ACx", CTLFLAG_RD, &sc->tz_zone.ac, |
| 295 | sizeof(sc->tz_zone.ac), "IK", ""); |
| 296 | SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), |
| 297 | OID_AUTO, "_TC1", CTLTYPE_INT | CTLFLAG_RW, |
| 298 | sc, offsetof(struct acpi_tz_softc, tz_zone.tc1), |
| 299 | acpi_tz_passive_sysctl, "I", |
| 300 | "thermal constant 1 for passive cooling"); |
| 301 | SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), |
| 302 | OID_AUTO, "_TC2", CTLTYPE_INT | CTLFLAG_RW, |
| 303 | sc, offsetof(struct acpi_tz_softc, tz_zone.tc2), |
| 304 | acpi_tz_passive_sysctl, "I", |
| 305 | "thermal constant 2 for passive cooling"); |
| 306 | SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree), |
| 307 | OID_AUTO, "_TSP", CTLTYPE_INT | CTLFLAG_RW, |
| 308 | sc, offsetof(struct acpi_tz_softc, tz_zone.tsp), |
| 309 | acpi_tz_passive_sysctl, "I", |
| 310 | "thermal sampling period for passive cooling"); |
| 311 | |
| 312 | /* |
| 313 | * Create thread to service all of the thermal zones. Register |
| 314 | * our power profile event handler. |
| 315 | */ |
| 316 | sc->tz_event = EVENTHANDLER_REGISTER(power_profile_change, |
| 317 | acpi_tz_power_profile, sc, 0); |
| 318 | if (acpi_tz_td == NULL) { |
| 319 | error = kthread_create(acpi_tz_thread, NULL, &acpi_tz_td, |
| 320 | "acpi_thermal"); |
| 321 | if (error != 0) { |
| 322 | device_printf(sc->tz_dev, "could not create thread - %d", error); |
| 323 | goto out; |
| 324 | } |
| 325 | } |
| 326 | |
| 327 | /* |
| 328 | * Create a thread to handle passive cooling for 1st zone which |
| 329 | * has _PSV, _TSP, _TC1 and _TC2. Users can enable it for other |
| 330 | * zones manually for now. |
| 331 | * |
| 332 | * XXX We enable only one zone to avoid multiple zones conflict |
| 333 | * with each other since cpufreq currently sets all CPUs to the |
| 334 | * given frequency whereas it's possible for different thermal |
| 335 | * zones to specify independent settings for multiple CPUs. |
| 336 | */ |
| 337 | if (acpi_tz_cooling_unit < 0 && acpi_tz_cooling_is_available(sc)) |
| 338 | sc->tz_cooling_enabled = TRUE; |
| 339 | if (sc->tz_cooling_enabled) { |
| 340 | error = acpi_tz_cooling_thread_start(sc); |
| 341 | if (error != 0) { |
| 342 | sc->tz_cooling_enabled = FALSE; |
| 343 | goto out; |
| 344 | } |
| 345 | acpi_tz_cooling_unit = device_get_unit(dev); |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Flag the event handler for a manual invocation by our timeout. |
| 350 | * We defer it like this so that the rest of the subsystem has time |
| 351 | * to come up. Don't bother evaluating/printing the temperature at |
| 352 | * this point; on many systems it'll be bogus until the EC is running. |
| 353 | */ |
| 354 | sc->tz_flags |= TZ_FLAG_GETPROFILE; |
| 355 | |
| 356 | /* Attach sensors(9). */ |
| 357 | strlcpy(sc->sensordev.xname, device_get_nameunit(sc->tz_dev), |
| 358 | sizeof(sc->sensordev.xname)); |
| 359 | |
| 360 | sc->sensor.type = SENSOR_TEMP; |
| 361 | sensor_attach(&sc->sensordev, &sc->sensor); |
| 362 | |
| 363 | sensordev_install(&sc->sensordev); |
| 364 | |
| 365 | out: |
| 366 | if (error != 0) { |
| 367 | EVENTHANDLER_DEREGISTER(power_profile_change, sc->tz_event); |
| 368 | AcpiRemoveNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY, |
| 369 | acpi_tz_notify_handler); |
| 370 | sysctl_ctx_free(&sc->tz_sysctl_ctx); |
| 371 | } |
| 372 | return_VALUE (error); |
| 373 | } |
| 374 | |
| 375 | /* |
| 376 | * Parse the current state of this thermal zone and set up to use it. |
| 377 | * |
| 378 | * Note that we may have previous state, which will have to be discarded. |
| 379 | */ |
| 380 | static int |
| 381 | acpi_tz_establish(struct acpi_tz_softc *sc) |
| 382 | { |
| 383 | ACPI_OBJECT *obj; |
| 384 | int i; |
| 385 | char nbuf[8]; |
| 386 | |
| 387 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 388 | |
| 389 | /* Erase any existing state. */ |
| 390 | for (i = 0; i < TZ_NUMLEVELS; i++) |
| 391 | if (sc->tz_zone.al[i].Pointer != NULL) |
| 392 | AcpiOsFree(sc->tz_zone.al[i].Pointer); |
| 393 | if (sc->tz_zone.psl.Pointer != NULL) |
| 394 | AcpiOsFree(sc->tz_zone.psl.Pointer); |
| 395 | |
| 396 | /* |
| 397 | * XXX: We initialize only ACPI_BUFFER to avoid race condition |
| 398 | * with passive cooling thread which refers psv, tc1, tc2 and tsp. |
| 399 | */ |
| 400 | bzero(sc->tz_zone.ac, sizeof(sc->tz_zone.ac)); |
| 401 | bzero(sc->tz_zone.al, sizeof(sc->tz_zone.al)); |
| 402 | bzero(&sc->tz_zone.psl, sizeof(sc->tz_zone.psl)); |
| 403 | |
| 404 | /* Evaluate thermal zone parameters. */ |
| 405 | for (i = 0; i < TZ_NUMLEVELS; i++) { |
| 406 | ksprintf(nbuf, "_AC%d", i); |
| 407 | acpi_tz_getparam(sc, nbuf, &sc->tz_zone.ac[i]); |
| 408 | ksprintf(nbuf, "_AL%d", i); |
| 409 | sc->tz_zone.al[i].Length = ACPI_ALLOCATE_BUFFER; |
| 410 | sc->tz_zone.al[i].Pointer = NULL; |
| 411 | AcpiEvaluateObject(sc->tz_handle, nbuf, NULL, &sc->tz_zone.al[i]); |
| 412 | obj = (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer; |
| 413 | if (obj != NULL) { |
| 414 | /* Should be a package containing a list of power objects */ |
| 415 | if (obj->Type != ACPI_TYPE_PACKAGE) { |
| 416 | device_printf(sc->tz_dev, "%s has unknown type %d, rejecting\n", |
| 417 | nbuf, obj->Type); |
| 418 | return_VALUE (ENXIO); |
| 419 | } |
| 420 | } |
| 421 | } |
| 422 | acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt); |
| 423 | acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot); |
| 424 | sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER; |
| 425 | sc->tz_zone.psl.Pointer = NULL; |
| 426 | AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl); |
| 427 | acpi_tz_getparam(sc, "_PSV", &sc->tz_zone.psv); |
| 428 | acpi_tz_getparam(sc, "_TC1", &sc->tz_zone.tc1); |
| 429 | acpi_tz_getparam(sc, "_TC2", &sc->tz_zone.tc2); |
| 430 | acpi_tz_getparam(sc, "_TSP", &sc->tz_zone.tsp); |
| 431 | acpi_tz_getparam(sc, "_TZP", &sc->tz_zone.tzp); |
| 432 | |
| 433 | /* |
| 434 | * Sanity-check the values we've been given. |
| 435 | * |
| 436 | * XXX what do we do about systems that give us the same value for |
| 437 | * more than one of these setpoints? |
| 438 | */ |
| 439 | acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT"); |
| 440 | acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT"); |
| 441 | acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV"); |
| 442 | for (i = 0; i < TZ_NUMLEVELS; i++) |
| 443 | acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx"); |
| 444 | |
| 445 | return_VALUE (0); |
| 446 | } |
| 447 | |
| 448 | static char *aclevel_string[] = { |
| 449 | "NONE", "_AC0", "_AC1", "_AC2", "_AC3", "_AC4", |
| 450 | "_AC5", "_AC6", "_AC7", "_AC8", "_AC9" |
| 451 | }; |
| 452 | |
| 453 | static __inline const char * |
| 454 | acpi_tz_aclevel_string(int active) |
| 455 | { |
| 456 | if (active < -1 || active >= TZ_NUMLEVELS) |
| 457 | return (aclevel_string[0]); |
| 458 | |
| 459 | return (aclevel_string[active + 1]); |
| 460 | } |
| 461 | |
| 462 | /* |
| 463 | * Get the current temperature. |
| 464 | */ |
| 465 | static int |
| 466 | acpi_tz_get_temperature(struct acpi_tz_softc *sc) |
| 467 | { |
| 468 | int temp; |
| 469 | ACPI_STATUS status; |
| 470 | static char *tmp_name = "_TMP"; |
| 471 | |
| 472 | ACPI_FUNCTION_NAME ("acpi_tz_get_temperature"); |
| 473 | |
| 474 | /* Evaluate the thermal zone's _TMP method. */ |
| 475 | status = acpi_GetInteger(sc->tz_handle, tmp_name, &temp); |
| 476 | if (ACPI_FAILURE(status)) { |
| 477 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 478 | "error fetching current temperature -- %s\n", |
| 479 | AcpiFormatException(status)); |
| 480 | return (FALSE); |
| 481 | } |
| 482 | |
| 483 | /* Check it for validity. */ |
| 484 | acpi_tz_sanity(sc, &temp, tmp_name); |
| 485 | if (temp == -1) |
| 486 | return (FALSE); |
| 487 | |
| 488 | ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp))); |
| 489 | sc->tz_temperature = temp; |
| 490 | /* Update sensor */ |
| 491 | if(sc->tz_temperature == -1) |
| 492 | sc->sensor.flags &= ~SENSOR_FINVALID; |
| 493 | sc->sensor.value = sc->tz_temperature * 100000 - 50000; |
| 494 | return (TRUE); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * Evaluate the condition of a thermal zone, take appropriate actions. |
| 499 | */ |
| 500 | static void |
| 501 | acpi_tz_monitor(void *Context) |
| 502 | { |
| 503 | struct acpi_tz_softc *sc; |
| 504 | struct timespec curtime; |
| 505 | int temp; |
| 506 | int i; |
| 507 | int newactive, newflags; |
| 508 | |
| 509 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 510 | |
| 511 | sc = (struct acpi_tz_softc *)Context; |
| 512 | |
| 513 | /* Get the current temperature. */ |
| 514 | if (!acpi_tz_get_temperature(sc)) { |
| 515 | /* XXX disable zone? go to max cooling? */ |
| 516 | return_VOID; |
| 517 | } |
| 518 | temp = sc->tz_temperature; |
| 519 | |
| 520 | /* |
| 521 | * Work out what we ought to be doing right now. |
| 522 | * |
| 523 | * Note that the _ACx levels sort from hot to cold. |
| 524 | */ |
| 525 | newactive = TZ_ACTIVE_NONE; |
| 526 | for (i = TZ_NUMLEVELS - 1; i >= 0; i--) { |
| 527 | if (sc->tz_zone.ac[i] != -1 && temp >= sc->tz_zone.ac[i]) { |
| 528 | newactive = i; |
| 529 | if (sc->tz_active != newactive) { |
| 530 | ACPI_VPRINT(sc->tz_dev, |
| 531 | acpi_device_get_parent_softc(sc->tz_dev), |
| 532 | "_AC%d: temperature %d.%d >= setpoint %d.%d\n", i, |
| 533 | TZ_KELVTOC(temp), TZ_KELVTOC(sc->tz_zone.ac[i])); |
| 534 | } |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | /* |
| 539 | * We are going to get _ACx level down (colder side), but give a guaranteed |
| 540 | * minimum cooling run time if requested. |
| 541 | */ |
| 542 | if (acpi_tz_min_runtime > 0 && sc->tz_active != TZ_ACTIVE_NONE && |
| 543 | sc->tz_active != TZ_ACTIVE_UNKNOWN && |
| 544 | (newactive == TZ_ACTIVE_NONE || newactive > sc->tz_active)) { |
| 545 | |
| 546 | getnanotime(&curtime); |
| 547 | timespecsub(&curtime, &sc->tz_cooling_started); |
| 548 | if (curtime.tv_sec < acpi_tz_min_runtime) |
| 549 | newactive = sc->tz_active; |
| 550 | } |
| 551 | |
| 552 | /* Handle user override of active mode */ |
| 553 | if (sc->tz_requested != TZ_ACTIVE_NONE && (newactive == TZ_ACTIVE_NONE |
| 554 | || sc->tz_requested < newactive)) |
| 555 | newactive = sc->tz_requested; |
| 556 | |
| 557 | /* update temperature-related flags */ |
| 558 | newflags = TZ_THFLAG_NONE; |
| 559 | if (sc->tz_zone.psv != -1 && temp >= sc->tz_zone.psv) |
| 560 | newflags |= TZ_THFLAG_PSV; |
| 561 | if (sc->tz_zone.hot != -1 && temp >= sc->tz_zone.hot) |
| 562 | newflags |= TZ_THFLAG_HOT; |
| 563 | if (sc->tz_zone.crt != -1 && temp >= sc->tz_zone.crt) |
| 564 | newflags |= TZ_THFLAG_CRT; |
| 565 | |
| 566 | /* If the active cooling state has changed, we have to switch things. */ |
| 567 | if (sc->tz_active == TZ_ACTIVE_UNKNOWN) { |
| 568 | /* |
| 569 | * We don't know which cooling device is on or off, |
| 570 | * so stop them all, because we now know which |
| 571 | * should be on (if any). |
| 572 | */ |
| 573 | for (i = 0; i < TZ_NUMLEVELS; i++) { |
| 574 | if (sc->tz_zone.al[i].Pointer != NULL) { |
| 575 | acpi_ForeachPackageObject( |
| 576 | (ACPI_OBJECT *)sc->tz_zone.al[i].Pointer, |
| 577 | acpi_tz_switch_cooler_off, sc); |
| 578 | } |
| 579 | } |
| 580 | /* now we know that all devices are off */ |
| 581 | sc->tz_active = TZ_ACTIVE_NONE; |
| 582 | } |
| 583 | |
| 584 | if (newactive != sc->tz_active) { |
| 585 | /* Turn off the cooling devices that are on, if any are */ |
| 586 | if (sc->tz_active != TZ_ACTIVE_NONE) |
| 587 | acpi_ForeachPackageObject( |
| 588 | (ACPI_OBJECT *)sc->tz_zone.al[sc->tz_active].Pointer, |
| 589 | acpi_tz_switch_cooler_off, sc); |
| 590 | |
| 591 | /* Turn on cooling devices that are required, if any are */ |
| 592 | if (newactive != TZ_ACTIVE_NONE) { |
| 593 | acpi_ForeachPackageObject( |
| 594 | (ACPI_OBJECT *)sc->tz_zone.al[newactive].Pointer, |
| 595 | acpi_tz_switch_cooler_on, sc); |
| 596 | } |
| 597 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 598 | "switched from %s to %s: %d.%dC\n", |
| 599 | acpi_tz_aclevel_string(sc->tz_active), |
| 600 | acpi_tz_aclevel_string(newactive), TZ_KELVTOC(temp)); |
| 601 | sc->tz_active = newactive; |
| 602 | getnanotime(&sc->tz_cooling_started); |
| 603 | } |
| 604 | |
| 605 | /* XXX (de)activate any passive cooling that may be required. */ |
| 606 | |
| 607 | /* |
| 608 | * If the temperature is at _HOT or _CRT, increment our event count. |
| 609 | * If it has occurred enough times, shutdown the system. This is |
| 610 | * needed because some systems will report an invalid high temperature |
| 611 | * for one poll cycle. It is suspected this is due to the embedded |
| 612 | * controller timing out. A typical value is 138C for one cycle on |
| 613 | * a system that is otherwise 65C. |
| 614 | * |
| 615 | * If we're almost at that threshold, notify the user through devd(8). |
| 616 | */ |
| 617 | if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) { |
| 618 | sc->tz_validchecks++; |
| 619 | if (sc->tz_validchecks == TZ_VALIDCHECKS) { |
| 620 | device_printf(sc->tz_dev, |
| 621 | "WARNING - current temperature (%d.%dC) exceeds safe limits\n", |
| 622 | TZ_KELVTOC(sc->tz_temperature)); |
| 623 | shutdown_nice(RB_POWEROFF); |
| 624 | } else if (sc->tz_validchecks == TZ_NOTIFYCOUNT) |
| 625 | acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL); |
| 626 | } else { |
| 627 | sc->tz_validchecks = 0; |
| 628 | } |
| 629 | sc->tz_thflags = newflags; |
| 630 | |
| 631 | return_VOID; |
| 632 | } |
| 633 | |
| 634 | /* |
| 635 | * Given an object, verify that it's a reference to a device of some sort, |
| 636 | * and try to switch it off. |
| 637 | */ |
| 638 | static void |
| 639 | acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg) |
| 640 | { |
| 641 | ACPI_HANDLE cooler; |
| 642 | |
| 643 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 644 | |
| 645 | cooler = acpi_GetReference(NULL, obj); |
| 646 | if (cooler == NULL) { |
| 647 | ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); |
| 648 | return_VOID; |
| 649 | } |
| 650 | |
| 651 | ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s off\n", |
| 652 | acpi_name(cooler))); |
| 653 | acpi_pwr_switch_consumer(cooler, ACPI_STATE_D3); |
| 654 | |
| 655 | return_VOID; |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * Given an object, verify that it's a reference to a device of some sort, |
| 660 | * and try to switch it on. |
| 661 | * |
| 662 | * XXX replication of off/on function code is bad. |
| 663 | */ |
| 664 | static void |
| 665 | acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg) |
| 666 | { |
| 667 | struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; |
| 668 | ACPI_HANDLE cooler; |
| 669 | ACPI_STATUS status; |
| 670 | |
| 671 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 672 | |
| 673 | cooler = acpi_GetReference(NULL, obj); |
| 674 | if (cooler == NULL) { |
| 675 | ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "can't get handle\n")); |
| 676 | return_VOID; |
| 677 | } |
| 678 | |
| 679 | ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "called to turn %s on\n", |
| 680 | acpi_name(cooler))); |
| 681 | status = acpi_pwr_switch_consumer(cooler, ACPI_STATE_D0); |
| 682 | if (ACPI_FAILURE(status)) { |
| 683 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 684 | "failed to activate %s - %s\n", acpi_name(cooler), |
| 685 | AcpiFormatException(status)); |
| 686 | } |
| 687 | |
| 688 | return_VOID; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * Read/debug-print a parameter, default it to -1. |
| 693 | */ |
| 694 | static void |
| 695 | acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data) |
| 696 | { |
| 697 | |
| 698 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 699 | |
| 700 | if (ACPI_FAILURE(acpi_GetInteger(sc->tz_handle, node, data))) { |
| 701 | *data = -1; |
| 702 | } else { |
| 703 | ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "%s.%s = %d\n", |
| 704 | acpi_name(sc->tz_handle), node, *data)); |
| 705 | } |
| 706 | |
| 707 | return_VOID; |
| 708 | } |
| 709 | |
| 710 | /* |
| 711 | * Sanity-check a temperature value. Assume that setpoints |
| 712 | * should be between 0C and 200C. |
| 713 | */ |
| 714 | static void |
| 715 | acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what) |
| 716 | { |
| 717 | if (*val != -1 && (*val < TZ_ZEROC || *val > TZ_ZEROC + 2000)) { |
| 718 | device_printf(sc->tz_dev, "%s value is absurd, ignored (%d.%dC)\n", |
| 719 | what, TZ_KELVTOC(*val)); |
| 720 | *val = -1; |
| 721 | } |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * Respond to a sysctl on the active state node. |
| 726 | */ |
| 727 | static int |
| 728 | acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS) |
| 729 | { |
| 730 | struct acpi_tz_softc *sc; |
| 731 | int active; |
| 732 | int error; |
| 733 | |
| 734 | sc = (struct acpi_tz_softc *)oidp->oid_arg1; |
| 735 | active = sc->tz_active; |
| 736 | error = sysctl_handle_int(oidp, &active, 0, req); |
| 737 | |
| 738 | /* Error or no new value */ |
| 739 | if (error != 0 || req->newptr == NULL) |
| 740 | return (error); |
| 741 | if (active < -1 || active >= TZ_NUMLEVELS) |
| 742 | return (EINVAL); |
| 743 | |
| 744 | /* Set new preferred level and re-switch */ |
| 745 | sc->tz_requested = active; |
| 746 | acpi_tz_signal(sc, 0); |
| 747 | return (0); |
| 748 | } |
| 749 | |
| 750 | static int |
| 751 | acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS) |
| 752 | { |
| 753 | struct acpi_tz_softc *sc; |
| 754 | int enabled, error; |
| 755 | |
| 756 | sc = (struct acpi_tz_softc *)oidp->oid_arg1; |
| 757 | enabled = sc->tz_cooling_enabled; |
| 758 | error = sysctl_handle_int(oidp, &enabled, 0, req); |
| 759 | |
| 760 | /* Error or no new value */ |
| 761 | if (error != 0 || req->newptr == NULL) |
| 762 | return (error); |
| 763 | if (enabled != TRUE && enabled != FALSE) |
| 764 | return (EINVAL); |
| 765 | |
| 766 | if (enabled) { |
| 767 | if (acpi_tz_cooling_is_available(sc)) |
| 768 | error = acpi_tz_cooling_thread_start(sc); |
| 769 | else |
| 770 | error = ENODEV; |
| 771 | if (error) |
| 772 | enabled = FALSE; |
| 773 | } |
| 774 | sc->tz_cooling_enabled = enabled; |
| 775 | return (error); |
| 776 | } |
| 777 | |
| 778 | static int |
| 779 | acpi_tz_temp_sysctl(SYSCTL_HANDLER_ARGS) |
| 780 | { |
| 781 | struct acpi_tz_softc *sc; |
| 782 | int temp, *temp_ptr; |
| 783 | int error; |
| 784 | |
| 785 | sc = oidp->oid_arg1; |
| 786 | temp_ptr = (int *)((uintptr_t)sc + oidp->oid_arg2); |
| 787 | temp = *temp_ptr; |
| 788 | error = sysctl_handle_int(oidp, &temp, 0, req); |
| 789 | |
| 790 | /* Error or no new value */ |
| 791 | if (error != 0 || req->newptr == NULL) |
| 792 | return (error); |
| 793 | |
| 794 | /* Only allow changing settings if override is set. */ |
| 795 | if (!acpi_tz_override) |
| 796 | return (EPERM); |
| 797 | |
| 798 | /* Check user-supplied value for sanity. */ |
| 799 | acpi_tz_sanity(sc, &temp, "user-supplied temp"); |
| 800 | if (temp == -1) |
| 801 | return (EINVAL); |
| 802 | |
| 803 | *temp_ptr = temp; |
| 804 | return (0); |
| 805 | } |
| 806 | |
| 807 | static int |
| 808 | acpi_tz_passive_sysctl(SYSCTL_HANDLER_ARGS) |
| 809 | { |
| 810 | struct acpi_tz_softc *sc; |
| 811 | int val, *val_ptr; |
| 812 | int error; |
| 813 | |
| 814 | sc = oidp->oid_arg1; |
| 815 | val_ptr = (int *)((uintptr_t)sc + oidp->oid_arg2); |
| 816 | val = *val_ptr; |
| 817 | error = sysctl_handle_int(oidp, &val, 0, req); |
| 818 | |
| 819 | /* Error or no new value */ |
| 820 | if (error != 0 || req->newptr == NULL) |
| 821 | return (error); |
| 822 | |
| 823 | /* Only allow changing settings if override is set. */ |
| 824 | if (!acpi_tz_override) |
| 825 | return (EPERM); |
| 826 | |
| 827 | *val_ptr = val; |
| 828 | return (0); |
| 829 | } |
| 830 | |
| 831 | static void |
| 832 | acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context) |
| 833 | { |
| 834 | struct acpi_tz_softc *sc = (struct acpi_tz_softc *)context; |
| 835 | |
| 836 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 837 | |
| 838 | switch (notify) { |
| 839 | case TZ_NOTIFY_TEMPERATURE: |
| 840 | /* Temperature change occurred */ |
| 841 | acpi_tz_signal(sc, 0); |
| 842 | break; |
| 843 | case TZ_NOTIFY_DEVICES: |
| 844 | case TZ_NOTIFY_LEVELS: |
| 845 | /* Zone devices/setpoints changed */ |
| 846 | acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS); |
| 847 | break; |
| 848 | default: |
| 849 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 850 | "unknown Notify event 0x%x\n", notify); |
| 851 | break; |
| 852 | } |
| 853 | |
| 854 | acpi_UserNotify("Thermal", h, notify); |
| 855 | |
| 856 | return_VOID; |
| 857 | } |
| 858 | |
| 859 | static void |
| 860 | acpi_tz_signal(struct acpi_tz_softc *sc, int flags) |
| 861 | { |
| 862 | ACPI_LOCK(thermal); |
| 863 | sc->tz_flags |= flags; |
| 864 | ACPI_UNLOCK(thermal); |
| 865 | wakeup(&acpi_tz_td); |
| 866 | } |
| 867 | |
| 868 | /* |
| 869 | * Notifies can be generated asynchronously but have also been seen to be |
| 870 | * triggered by other thermal methods. One system generates a notify of |
| 871 | * 0x81 when the fan is turned on or off. Another generates it when _SCP |
| 872 | * is called. To handle these situations, we check the zone via |
| 873 | * acpi_tz_monitor() before evaluating changes to setpoints or the cooling |
| 874 | * policy. |
| 875 | */ |
| 876 | static void |
| 877 | acpi_tz_timeout(struct acpi_tz_softc *sc, int flags) |
| 878 | { |
| 879 | |
| 880 | /* Check the current temperature and take action based on it */ |
| 881 | acpi_tz_monitor(sc); |
| 882 | |
| 883 | /* If requested, get the power profile settings. */ |
| 884 | if (flags & TZ_FLAG_GETPROFILE) |
| 885 | acpi_tz_power_profile(sc); |
| 886 | |
| 887 | /* |
| 888 | * If requested, check for new devices/setpoints. After finding them, |
| 889 | * check if we need to switch fans based on the new values. |
| 890 | */ |
| 891 | if (flags & TZ_FLAG_GETSETTINGS) { |
| 892 | acpi_tz_establish(sc); |
| 893 | acpi_tz_monitor(sc); |
| 894 | } |
| 895 | |
| 896 | /* XXX passive cooling actions? */ |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * System power profile may have changed; fetch and notify the |
| 901 | * thermal zone accordingly. |
| 902 | * |
| 903 | * Since this can be called from an arbitrary eventhandler, it needs |
| 904 | * to get the ACPI lock itself. |
| 905 | */ |
| 906 | static void |
| 907 | acpi_tz_power_profile(void *arg) |
| 908 | { |
| 909 | ACPI_STATUS status; |
| 910 | struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg; |
| 911 | int state; |
| 912 | |
| 913 | state = power_profile_get_state(); |
| 914 | if (state != POWER_PROFILE_PERFORMANCE && state != POWER_PROFILE_ECONOMY) |
| 915 | return; |
| 916 | |
| 917 | /* check that we haven't decided there's no _SCP method */ |
| 918 | if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) { |
| 919 | |
| 920 | /* Call _SCP to set the new profile */ |
| 921 | status = acpi_SetInteger(sc->tz_handle, "_SCP", |
| 922 | (state == POWER_PROFILE_PERFORMANCE) ? 0 : 1); |
| 923 | if (ACPI_FAILURE(status)) { |
| 924 | if (status != AE_NOT_FOUND) |
| 925 | ACPI_VPRINT(sc->tz_dev, |
| 926 | acpi_device_get_parent_softc(sc->tz_dev), |
| 927 | "can't evaluate %s._SCP - %s\n", |
| 928 | acpi_name(sc->tz_handle), |
| 929 | AcpiFormatException(status)); |
| 930 | sc->tz_flags |= TZ_FLAG_NO_SCP; |
| 931 | } else { |
| 932 | /* We have to re-evaluate the entire zone now */ |
| 933 | acpi_tz_signal(sc, TZ_FLAG_GETSETTINGS); |
| 934 | } |
| 935 | } |
| 936 | } |
| 937 | |
| 938 | /* |
| 939 | * Thermal zone monitor thread. |
| 940 | */ |
| 941 | static void |
| 942 | acpi_tz_thread(void *arg) |
| 943 | { |
| 944 | device_t *devs; |
| 945 | int devcount, i; |
| 946 | int flags; |
| 947 | struct acpi_tz_softc **sc; |
| 948 | |
| 949 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 950 | |
| 951 | devs = NULL; |
| 952 | devcount = 0; |
| 953 | sc = NULL; |
| 954 | get_mplock(); |
| 955 | |
| 956 | for (;;) { |
| 957 | /* If the number of devices has changed, re-evaluate. */ |
| 958 | if (devclass_get_count(acpi_tz_devclass) != devcount) { |
| 959 | if (devs != NULL) { |
| 960 | kfree(devs, M_TEMP); |
| 961 | kfree(sc, M_TEMP); |
| 962 | } |
| 963 | devclass_get_devices(acpi_tz_devclass, &devs, &devcount); |
| 964 | sc = kmalloc(sizeof(struct acpi_tz_softc *) * devcount, M_TEMP, |
| 965 | M_WAITOK | M_ZERO); |
| 966 | for (i = 0; i < devcount; i++) |
| 967 | sc[i] = device_get_softc(devs[i]); |
| 968 | } |
| 969 | |
| 970 | /* Check for temperature events and act on them. */ |
| 971 | for (i = 0; i < devcount; i++) { |
| 972 | ACPI_LOCK(thermal); |
| 973 | flags = sc[i]->tz_flags; |
| 974 | sc[i]->tz_flags &= TZ_FLAG_NO_SCP; |
| 975 | ACPI_UNLOCK(thermal); |
| 976 | acpi_tz_timeout(sc[i], flags); |
| 977 | } |
| 978 | |
| 979 | /* If more work to do, don't go to sleep yet. */ |
| 980 | ACPI_LOCK(thermal); |
| 981 | for (i = 0; i < devcount; i++) { |
| 982 | if (sc[i]->tz_flags & ~TZ_FLAG_NO_SCP) |
| 983 | break; |
| 984 | } |
| 985 | |
| 986 | /* |
| 987 | * Interlocked sleep until signaled or we timeout. |
| 988 | */ |
| 989 | if (i == devcount) { |
| 990 | tsleep_interlock(&acpi_tz_td, 0); |
| 991 | ACPI_UNLOCK(thermal); |
| 992 | tsleep(&acpi_tz_td, 0, "tzpoll", hz * acpi_tz_polling_rate); |
| 993 | } else { |
| 994 | ACPI_UNLOCK(thermal); |
| 995 | } |
| 996 | } |
| 997 | rel_mplock(); |
| 998 | } |
| 999 | |
| 1000 | #ifdef __FreeBSD__ |
| 1001 | static int |
| 1002 | acpi_tz_cpufreq_restore(struct acpi_tz_softc *sc) |
| 1003 | { |
| 1004 | device_t dev; |
| 1005 | int error; |
| 1006 | |
| 1007 | if (!sc->tz_cooling_updated) |
| 1008 | return (0); |
| 1009 | if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL) |
| 1010 | return (ENXIO); |
| 1011 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 1012 | "temperature %d.%dC: resuming previous clock speed (%d MHz)\n", |
| 1013 | TZ_KELVTOC(sc->tz_temperature), sc->tz_cooling_saved_freq); |
| 1014 | error = CPUFREQ_SET(dev, NULL, CPUFREQ_PRIO_KERN); |
| 1015 | if (error == 0) |
| 1016 | sc->tz_cooling_updated = FALSE; |
| 1017 | return (error); |
| 1018 | } |
| 1019 | |
| 1020 | static int |
| 1021 | acpi_tz_cpufreq_update(struct acpi_tz_softc *sc, int req) |
| 1022 | { |
| 1023 | device_t dev; |
| 1024 | struct cf_level *levels; |
| 1025 | int num_levels, error, freq, desired_freq, perf, i; |
| 1026 | |
| 1027 | levels = kmalloc(CPUFREQ_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT); |
| 1028 | if (levels == NULL) |
| 1029 | return (ENOMEM); |
| 1030 | |
| 1031 | /* |
| 1032 | * Find the main device, cpufreq0. We don't yet support independent |
| 1033 | * CPU frequency control on SMP. |
| 1034 | */ |
| 1035 | if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL) { |
| 1036 | error = ENXIO; |
| 1037 | goto out; |
| 1038 | } |
| 1039 | |
| 1040 | /* Get the current frequency. */ |
| 1041 | error = CPUFREQ_GET(dev, &levels[0]); |
| 1042 | if (error) |
| 1043 | goto out; |
| 1044 | freq = levels[0].total_set.freq; |
| 1045 | |
| 1046 | /* Get the current available frequency levels. */ |
| 1047 | num_levels = CPUFREQ_MAX_LEVELS; |
| 1048 | error = CPUFREQ_LEVELS(dev, levels, &num_levels); |
| 1049 | if (error) { |
| 1050 | if (error == E2BIG) |
| 1051 | printf("cpufreq: need to increase CPUFREQ_MAX_LEVELS\n"); |
| 1052 | goto out; |
| 1053 | } |
| 1054 | |
| 1055 | /* Calculate the desired frequency as a percent of the max frequency. */ |
| 1056 | perf = 100 * freq / levels[0].total_set.freq - req; |
| 1057 | if (perf < 0) |
| 1058 | perf = 0; |
| 1059 | else if (perf > 100) |
| 1060 | perf = 100; |
| 1061 | desired_freq = levels[0].total_set.freq * perf / 100; |
| 1062 | |
| 1063 | if (desired_freq < freq) { |
| 1064 | /* Find the closest available frequency, rounding down. */ |
| 1065 | for (i = 0; i < num_levels; i++) |
| 1066 | if (levels[i].total_set.freq <= desired_freq) |
| 1067 | break; |
| 1068 | |
| 1069 | /* If we didn't find a relevant setting, use the lowest. */ |
| 1070 | if (i == num_levels) |
| 1071 | i--; |
| 1072 | } else { |
| 1073 | /* If we didn't decrease frequency yet, don't increase it. */ |
| 1074 | if (!sc->tz_cooling_updated) { |
| 1075 | sc->tz_cooling_active = FALSE; |
| 1076 | goto out; |
| 1077 | } |
| 1078 | |
| 1079 | /* Use saved cpu frequency as maximum value. */ |
| 1080 | if (desired_freq > sc->tz_cooling_saved_freq) |
| 1081 | desired_freq = sc->tz_cooling_saved_freq; |
| 1082 | |
| 1083 | /* Find the closest available frequency, rounding up. */ |
| 1084 | for (i = num_levels - 1; i >= 0; i--) |
| 1085 | if (levels[i].total_set.freq >= desired_freq) |
| 1086 | break; |
| 1087 | |
| 1088 | /* If we didn't find a relevant setting, use the highest. */ |
| 1089 | if (i == -1) |
| 1090 | i++; |
| 1091 | |
| 1092 | /* If we're going to the highest frequency, restore the old setting. */ |
| 1093 | if (i == 0 || desired_freq == sc->tz_cooling_saved_freq) { |
| 1094 | error = acpi_tz_cpufreq_restore(sc); |
| 1095 | if (error == 0) |
| 1096 | sc->tz_cooling_active = FALSE; |
| 1097 | goto out; |
| 1098 | } |
| 1099 | } |
| 1100 | |
| 1101 | /* If we are going to a new frequency, activate it. */ |
| 1102 | if (levels[i].total_set.freq != freq) { |
| 1103 | ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev), |
| 1104 | "temperature %d.%dC: %screasing clock speed " |
| 1105 | "from %d MHz to %d MHz\n", |
| 1106 | TZ_KELVTOC(sc->tz_temperature), |
| 1107 | (freq > levels[i].total_set.freq) ? "de" : "in", |
| 1108 | freq, levels[i].total_set.freq); |
| 1109 | error = CPUFREQ_SET(dev, &levels[i], CPUFREQ_PRIO_KERN); |
| 1110 | if (error == 0 && !sc->tz_cooling_updated) { |
| 1111 | sc->tz_cooling_saved_freq = freq; |
| 1112 | sc->tz_cooling_updated = TRUE; |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | out: |
| 1117 | if (levels) |
| 1118 | free(levels, M_TEMP); |
| 1119 | return (error); |
| 1120 | } |
| 1121 | #endif |
| 1122 | |
| 1123 | /* |
| 1124 | * Passive cooling thread; monitors current temperature according to the |
| 1125 | * cooling interval and calculates whether to scale back CPU frequency. |
| 1126 | */ |
| 1127 | static void |
| 1128 | acpi_tz_cooling_thread(void *arg) |
| 1129 | { |
| 1130 | struct acpi_tz_softc *sc; |
| 1131 | int perf, curr_temp, prev_temp; |
| 1132 | #ifdef __FreeBSD__ |
| 1133 | int error; |
| 1134 | #endif |
| 1135 | |
| 1136 | ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); |
| 1137 | |
| 1138 | sc = (struct acpi_tz_softc *)arg; |
| 1139 | get_mplock(); |
| 1140 | |
| 1141 | prev_temp = sc->tz_temperature; |
| 1142 | while (sc->tz_cooling_enabled) { |
| 1143 | if (sc->tz_cooling_active) |
| 1144 | (void)acpi_tz_get_temperature(sc); |
| 1145 | curr_temp = sc->tz_temperature; |
| 1146 | if (curr_temp >= sc->tz_zone.psv) |
| 1147 | sc->tz_cooling_active = TRUE; |
| 1148 | if (sc->tz_cooling_active) { |
| 1149 | perf = sc->tz_zone.tc1 * (curr_temp - prev_temp) + |
| 1150 | sc->tz_zone.tc2 * (curr_temp - sc->tz_zone.psv); |
| 1151 | perf /= 10; |
| 1152 | |
| 1153 | if (perf != 0) { |
| 1154 | #ifdef __FreeBSD__ |
| 1155 | error = acpi_tz_cpufreq_update(sc, perf); |
| 1156 | |
| 1157 | /* |
| 1158 | * If error and not simply a higher priority setting was |
| 1159 | * active, disable cooling. |
| 1160 | */ |
| 1161 | if (error != 0 && error != EPERM) { |
| 1162 | device_printf(sc->tz_dev, |
| 1163 | "failed to set new freq, disabling passive cooling\n"); |
| 1164 | sc->tz_cooling_enabled = FALSE; |
| 1165 | } |
| 1166 | #endif |
| 1167 | } |
| 1168 | } |
| 1169 | prev_temp = curr_temp; |
| 1170 | tsleep(&sc->tz_cooling_proc, 0, "cooling", |
| 1171 | hz * sc->tz_zone.tsp / 10); |
| 1172 | } |
| 1173 | if (sc->tz_cooling_active) { |
| 1174 | #ifdef __FreeBSD__ |
| 1175 | acpi_tz_cpufreq_restore(sc); |
| 1176 | #endif |
| 1177 | sc->tz_cooling_active = FALSE; |
| 1178 | } |
| 1179 | sc->tz_cooling_proc = NULL; |
| 1180 | ACPI_LOCK(thermal); |
| 1181 | sc->tz_cooling_proc_running = FALSE; |
| 1182 | ACPI_UNLOCK(thermal); |
| 1183 | rel_mplock(); |
| 1184 | } |
| 1185 | |
| 1186 | /* |
| 1187 | * TODO: We ignore _PSL (list of cooling devices) since cpufreq enumerates |
| 1188 | * all CPUs for us. However, it's possible in the future _PSL will |
| 1189 | * reference non-CPU devices so we may want to support it then. |
| 1190 | */ |
| 1191 | static int |
| 1192 | acpi_tz_cooling_is_available(struct acpi_tz_softc *sc) |
| 1193 | { |
| 1194 | return (sc->tz_zone.tc1 != -1 && sc->tz_zone.tc2 != -1 && |
| 1195 | sc->tz_zone.tsp != -1 && sc->tz_zone.tsp != 0 && |
| 1196 | sc->tz_zone.psv != -1); |
| 1197 | } |
| 1198 | |
| 1199 | static int |
| 1200 | acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc) |
| 1201 | { |
| 1202 | int error; |
| 1203 | |
| 1204 | ACPI_LOCK(thermal); |
| 1205 | if (sc->tz_cooling_proc_running) { |
| 1206 | ACPI_UNLOCK(thermal); |
| 1207 | return (0); |
| 1208 | } |
| 1209 | sc->tz_cooling_proc_running = TRUE; |
| 1210 | ACPI_UNLOCK(thermal); |
| 1211 | error = 0; |
| 1212 | if (sc->tz_cooling_proc == NULL) { |
| 1213 | error = kthread_create(acpi_tz_cooling_thread, sc, |
| 1214 | &sc->tz_cooling_proc, |
| 1215 | "acpi_cooling%d", device_get_unit(sc->tz_dev)); |
| 1216 | if (error != 0) { |
| 1217 | device_printf(sc->tz_dev, "could not create thread - %d", error); |
| 1218 | ACPI_LOCK(thermal); |
| 1219 | sc->tz_cooling_proc_running = FALSE; |
| 1220 | ACPI_UNLOCK(thermal); |
| 1221 | } |
| 1222 | } |
| 1223 | return (error); |
| 1224 | } |