mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-03 23:28:58 +00:00
Implement passive cooling. It is enabled for tz0 by default where
it is available. Reviewed by: njl
This commit is contained in:
parent
ddf9c4f771
commit
e71de913d8
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=148138
|
@ -32,6 +32,7 @@ __FBSDID("$FreeBSD$");
|
||||||
#include <sys/param.h>
|
#include <sys/param.h>
|
||||||
#include <sys/kernel.h>
|
#include <sys/kernel.h>
|
||||||
#include <sys/bus.h>
|
#include <sys/bus.h>
|
||||||
|
#include <sys/cpu.h>
|
||||||
#include <sys/kthread.h>
|
#include <sys/kthread.h>
|
||||||
#include <sys/malloc.h>
|
#include <sys/malloc.h>
|
||||||
#include <sys/module.h>
|
#include <sys/module.h>
|
||||||
|
@ -42,6 +43,8 @@ __FBSDID("$FreeBSD$");
|
||||||
#include <sys/unistd.h>
|
#include <sys/unistd.h>
|
||||||
#include <sys/power.h>
|
#include <sys/power.h>
|
||||||
|
|
||||||
|
#include "cpufreq_if.h"
|
||||||
|
|
||||||
#include "acpi.h"
|
#include "acpi.h"
|
||||||
#include <dev/acpica/acpivar.h>
|
#include <dev/acpica/acpivar.h>
|
||||||
|
|
||||||
|
@ -92,7 +95,7 @@ struct acpi_tz_softc {
|
||||||
#define TZ_THFLAG_NONE 0
|
#define TZ_THFLAG_NONE 0
|
||||||
#define TZ_THFLAG_PSV (1<<0)
|
#define TZ_THFLAG_PSV (1<<0)
|
||||||
#define TZ_THFLAG_HOT (1<<2)
|
#define TZ_THFLAG_HOT (1<<2)
|
||||||
#define TZ_THFLAG_CRT (1<<3)
|
#define TZ_THFLAG_CRT (1<<3)
|
||||||
int tz_flags;
|
int tz_flags;
|
||||||
#define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/
|
#define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/
|
||||||
#define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/
|
#define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/
|
||||||
|
@ -106,8 +109,16 @@ struct acpi_tz_softc {
|
||||||
|
|
||||||
struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/
|
struct acpi_tz_zone tz_zone; /*Thermal zone parameters*/
|
||||||
int tz_validchecks;
|
int tz_validchecks;
|
||||||
|
|
||||||
|
/* passive cooling */
|
||||||
|
struct proc *tz_cooling_proc;
|
||||||
|
int tz_cooling_enabled;
|
||||||
|
int tz_cooling_active;
|
||||||
|
int tz_cooling_updated;
|
||||||
};
|
};
|
||||||
|
|
||||||
|
#define CPUFREQ_MAX_LEVELS 64 /* XXX cpufreq should export this */
|
||||||
|
|
||||||
static int acpi_tz_probe(device_t dev);
|
static int acpi_tz_probe(device_t dev);
|
||||||
static int acpi_tz_attach(device_t dev);
|
static int acpi_tz_attach(device_t dev);
|
||||||
static int acpi_tz_establish(struct acpi_tz_softc *sc);
|
static int acpi_tz_establish(struct acpi_tz_softc *sc);
|
||||||
|
@ -118,12 +129,15 @@ static void acpi_tz_getparam(struct acpi_tz_softc *sc, char *node,
|
||||||
int *data);
|
int *data);
|
||||||
static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what);
|
static void acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what);
|
||||||
static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS);
|
static int acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS);
|
||||||
|
static int acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS);
|
||||||
static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify,
|
static void acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify,
|
||||||
void *context);
|
void *context);
|
||||||
static void acpi_tz_signal(struct acpi_tz_softc *sc, int flags);
|
static void acpi_tz_signal(struct acpi_tz_softc *sc, int flags);
|
||||||
static void acpi_tz_timeout(struct acpi_tz_softc *sc, int flags);
|
static void acpi_tz_timeout(struct acpi_tz_softc *sc, int flags);
|
||||||
static void acpi_tz_power_profile(void *arg);
|
static void acpi_tz_power_profile(void *arg);
|
||||||
static void acpi_tz_thread(void *arg);
|
static void acpi_tz_thread(void *arg);
|
||||||
|
static int acpi_tz_cooling_is_available(struct acpi_tz_softc *sc);
|
||||||
|
static int acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc);
|
||||||
|
|
||||||
static device_method_t acpi_tz_methods[] = {
|
static device_method_t acpi_tz_methods[] = {
|
||||||
/* Device interface */
|
/* Device interface */
|
||||||
|
@ -158,7 +172,7 @@ static int
|
||||||
acpi_tz_probe(device_t dev)
|
acpi_tz_probe(device_t dev)
|
||||||
{
|
{
|
||||||
int result;
|
int result;
|
||||||
|
|
||||||
if (acpi_get_type(dev) == ACPI_TYPE_THERMAL && !acpi_disabled("thermal")) {
|
if (acpi_get_type(dev) == ACPI_TYPE_THERMAL && !acpi_disabled("thermal")) {
|
||||||
device_set_desc(dev, "Thermal Zone");
|
device_set_desc(dev, "Thermal Zone");
|
||||||
result = -10;
|
result = -10;
|
||||||
|
@ -183,6 +197,20 @@ acpi_tz_attach(device_t dev)
|
||||||
sc->tz_requested = TZ_ACTIVE_NONE;
|
sc->tz_requested = TZ_ACTIVE_NONE;
|
||||||
sc->tz_active = TZ_ACTIVE_NONE;
|
sc->tz_active = TZ_ACTIVE_NONE;
|
||||||
sc->tz_thflags = TZ_THFLAG_NONE;
|
sc->tz_thflags = TZ_THFLAG_NONE;
|
||||||
|
sc->tz_cooling_proc = NULL;
|
||||||
|
sc->tz_cooling_active = FALSE;
|
||||||
|
sc->tz_cooling_updated = FALSE;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Always attempt to enable passive cooling for tz0. Users can enable
|
||||||
|
* it for other zones manually for now.
|
||||||
|
*
|
||||||
|
* XXX We need to test if multiple zones conflict with each other
|
||||||
|
* since cpufreq currently sets all CPUs to the given frequency whereas
|
||||||
|
* it's possible for different thermal zones to specify independent
|
||||||
|
* settings for multiple CPUs.
|
||||||
|
*/
|
||||||
|
sc->tz_cooling_enabled = (device_get_unit(dev) == 0);
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Parse the current state of the thermal zone and build control
|
* Parse the current state of the thermal zone and build control
|
||||||
|
@ -195,7 +223,7 @@ acpi_tz_attach(device_t dev)
|
||||||
/*
|
/*
|
||||||
* Register for any Notify events sent to this zone.
|
* Register for any Notify events sent to this zone.
|
||||||
*/
|
*/
|
||||||
AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
|
AcpiInstallNotifyHandler(sc->tz_handle, ACPI_DEVICE_NOTIFY,
|
||||||
acpi_tz_notify_handler, sc);
|
acpi_tz_notify_handler, sc);
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -231,7 +259,10 @@ acpi_tz_attach(device_t dev)
|
||||||
SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
|
SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
|
||||||
OID_AUTO, "active", CTLTYPE_INT | CTLFLAG_RW,
|
OID_AUTO, "active", CTLTYPE_INT | CTLFLAG_RW,
|
||||||
sc, 0, acpi_tz_active_sysctl, "I", "");
|
sc, 0, acpi_tz_active_sysctl, "I", "");
|
||||||
|
SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
|
||||||
|
OID_AUTO, "passive_cooling", CTLTYPE_INT | CTLFLAG_RW,
|
||||||
|
sc, 0, acpi_tz_cooling_sysctl, "I", "");
|
||||||
|
|
||||||
SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
|
SYSCTL_ADD_INT(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
|
||||||
OID_AUTO, "thermal_flags", CTLFLAG_RD,
|
OID_AUTO, "thermal_flags", CTLFLAG_RD,
|
||||||
&sc->tz_thflags, 0, "thermal zone flags");
|
&sc->tz_thflags, 0, "thermal zone flags");
|
||||||
|
@ -249,8 +280,8 @@ acpi_tz_attach(device_t dev)
|
||||||
sizeof(sc->tz_zone.ac), "IK", "");
|
sizeof(sc->tz_zone.ac), "IK", "");
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Create our thread; we only need one, it will service all of the
|
* Create thread to service all of the thermal zones. Register
|
||||||
* thermal zones. Register our power profile event handler.
|
* our power profile event handler.
|
||||||
*/
|
*/
|
||||||
sc->tz_event = EVENTHANDLER_REGISTER(power_profile_change,
|
sc->tz_event = EVENTHANDLER_REGISTER(power_profile_change,
|
||||||
acpi_tz_power_profile, sc, 0);
|
acpi_tz_power_profile, sc, 0);
|
||||||
|
@ -263,6 +294,18 @@ acpi_tz_attach(device_t dev)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/* Create a thread to handle passive cooling for each zone if enabled. */
|
||||||
|
if (sc->tz_cooling_enabled) {
|
||||||
|
if (acpi_tz_cooling_is_available(sc)) {
|
||||||
|
error = acpi_tz_cooling_thread_start(sc);
|
||||||
|
if (error != 0) {
|
||||||
|
sc->tz_cooling_enabled = FALSE;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
} else
|
||||||
|
sc->tz_cooling_enabled = FALSE;
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Flag the event handler for a manual invocation by our timeout.
|
* Flag the event handler for a manual invocation by our timeout.
|
||||||
* We defer it like this so that the rest of the subsystem has time
|
* We defer it like this so that the rest of the subsystem has time
|
||||||
|
@ -292,7 +335,7 @@ acpi_tz_establish(struct acpi_tz_softc *sc)
|
||||||
ACPI_OBJECT *obj;
|
ACPI_OBJECT *obj;
|
||||||
int i;
|
int i;
|
||||||
char nbuf[8];
|
char nbuf[8];
|
||||||
|
|
||||||
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
||||||
|
|
||||||
/* Erase any existing state. */
|
/* Erase any existing state. */
|
||||||
|
@ -487,7 +530,7 @@ acpi_tz_monitor(void *Context)
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Given an object, verify that it's a reference to a device of some sort,
|
* Given an object, verify that it's a reference to a device of some sort,
|
||||||
* and try to switch it off.
|
* and try to switch it off.
|
||||||
*/
|
*/
|
||||||
static void
|
static void
|
||||||
|
@ -511,7 +554,7 @@ acpi_tz_switch_cooler_off(ACPI_OBJECT *obj, void *arg)
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Given an object, verify that it's a reference to a device of some sort,
|
* Given an object, verify that it's a reference to a device of some sort,
|
||||||
* and try to switch it on.
|
* and try to switch it on.
|
||||||
*
|
*
|
||||||
* XXX replication of off/on function code is bad.
|
* XXX replication of off/on function code is bad.
|
||||||
|
@ -522,7 +565,7 @@ acpi_tz_switch_cooler_on(ACPI_OBJECT *obj, void *arg)
|
||||||
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
|
struct acpi_tz_softc *sc = (struct acpi_tz_softc *)arg;
|
||||||
ACPI_HANDLE cooler;
|
ACPI_HANDLE cooler;
|
||||||
ACPI_STATUS status;
|
ACPI_STATUS status;
|
||||||
|
|
||||||
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
||||||
|
|
||||||
cooler = acpi_GetReference(NULL, obj);
|
cooler = acpi_GetReference(NULL, obj);
|
||||||
|
@ -559,7 +602,7 @@ acpi_tz_getparam(struct acpi_tz_softc *sc, char *node, int *data)
|
||||||
acpi_name(sc->tz_handle), node, *data));
|
acpi_name(sc->tz_handle), node, *data));
|
||||||
}
|
}
|
||||||
|
|
||||||
return_VOID;
|
return_VOID;
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
|
@ -578,7 +621,7 @@ acpi_tz_sanity(struct acpi_tz_softc *sc, int *val, char *what)
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Respond to a sysctl on the active state node.
|
* Respond to a sysctl on the active state node.
|
||||||
*/
|
*/
|
||||||
static int
|
static int
|
||||||
acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS)
|
acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS)
|
||||||
{
|
{
|
||||||
|
@ -602,6 +645,34 @@ acpi_tz_active_sysctl(SYSCTL_HANDLER_ARGS)
|
||||||
return (0);
|
return (0);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
acpi_tz_cooling_sysctl(SYSCTL_HANDLER_ARGS)
|
||||||
|
{
|
||||||
|
struct acpi_tz_softc *sc;
|
||||||
|
int enabled, error;
|
||||||
|
|
||||||
|
sc = (struct acpi_tz_softc *)oidp->oid_arg1;
|
||||||
|
enabled = sc->tz_cooling_enabled;
|
||||||
|
error = sysctl_handle_int(oidp, &enabled, 0, req);
|
||||||
|
|
||||||
|
/* Error or no new value */
|
||||||
|
if (error != 0 || req->newptr == NULL)
|
||||||
|
return (error);
|
||||||
|
if (enabled != TRUE && enabled != FALSE)
|
||||||
|
return (EINVAL);
|
||||||
|
|
||||||
|
if (enabled) {
|
||||||
|
if (acpi_tz_cooling_is_available(sc))
|
||||||
|
error = acpi_tz_cooling_thread_start(sc);
|
||||||
|
else
|
||||||
|
error = ENODEV;
|
||||||
|
if (error)
|
||||||
|
enabled = FALSE;
|
||||||
|
}
|
||||||
|
sc->tz_cooling_enabled = enabled;
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
||||||
static void
|
static void
|
||||||
acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
|
acpi_tz_notify_handler(ACPI_HANDLE h, UINT32 notify, void *context)
|
||||||
{
|
{
|
||||||
|
@ -692,7 +763,7 @@ acpi_tz_power_profile(void *arg)
|
||||||
if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) {
|
if ((sc->tz_flags & TZ_FLAG_NO_SCP) == 0) {
|
||||||
|
|
||||||
/* Call _SCP to set the new profile */
|
/* Call _SCP to set the new profile */
|
||||||
status = acpi_SetInteger(sc->tz_handle, "_SCP",
|
status = acpi_SetInteger(sc->tz_handle, "_SCP",
|
||||||
(state == POWER_PROFILE_PERFORMANCE) ? 0 : 1);
|
(state == POWER_PROFILE_PERFORMANCE) ? 0 : 1);
|
||||||
if (ACPI_FAILURE(status)) {
|
if (ACPI_FAILURE(status)) {
|
||||||
if (status != AE_NOT_FOUND)
|
if (status != AE_NOT_FOUND)
|
||||||
|
@ -768,3 +839,196 @@ acpi_tz_thread(void *arg)
|
||||||
ACPI_UNLOCK(thermal);
|
ACPI_UNLOCK(thermal);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
acpi_tz_cpufreq_restore(struct acpi_tz_softc *sc)
|
||||||
|
{
|
||||||
|
device_t dev;
|
||||||
|
int error;
|
||||||
|
|
||||||
|
if (!sc->tz_cooling_updated)
|
||||||
|
return (0);
|
||||||
|
if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL)
|
||||||
|
return (ENXIO);
|
||||||
|
ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
|
||||||
|
"temperature %d.%dC: resuming previous clock speed\n",
|
||||||
|
TZ_KELVTOC(sc->tz_temperature));
|
||||||
|
error = CPUFREQ_SET(dev, NULL, CPUFREQ_PRIO_KERN);
|
||||||
|
if (error == 0)
|
||||||
|
sc->tz_cooling_updated = FALSE;
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
acpi_tz_cpufreq_update(struct acpi_tz_softc *sc, int req)
|
||||||
|
{
|
||||||
|
device_t dev;
|
||||||
|
struct cf_level *levels;
|
||||||
|
int num_levels, error, freq, desired_freq, perf, i;
|
||||||
|
|
||||||
|
levels = malloc(CPUFREQ_MAX_LEVELS * sizeof(*levels), M_TEMP, M_NOWAIT);
|
||||||
|
if (levels == NULL)
|
||||||
|
return (ENOMEM);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Find the main device, cpufreq0. We don't yet support independent
|
||||||
|
* CPU frequency control on SMP.
|
||||||
|
*/
|
||||||
|
if ((dev = devclass_get_device(devclass_find("cpufreq"), 0)) == NULL) {
|
||||||
|
error = ENXIO;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Get the current frequency. */
|
||||||
|
error = CPUFREQ_GET(dev, &levels[0]);
|
||||||
|
if (error)
|
||||||
|
goto out;
|
||||||
|
freq = levels[0].total_set.freq;
|
||||||
|
|
||||||
|
/* Get the current available frequency levels. */
|
||||||
|
num_levels = CPUFREQ_MAX_LEVELS;
|
||||||
|
error = CPUFREQ_LEVELS(dev, levels, &num_levels);
|
||||||
|
if (error) {
|
||||||
|
if (error == E2BIG)
|
||||||
|
printf("cpufreq: need to increase CPUFREQ_MAX_LEVELS\n");
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Calculate the desired frequency as a percent of the max frequency. */
|
||||||
|
perf = 100 * freq / levels[0].total_set.freq - req;
|
||||||
|
if (perf < 0)
|
||||||
|
perf = 0;
|
||||||
|
else if (perf > 100)
|
||||||
|
perf = 100;
|
||||||
|
desired_freq = levels[0].total_set.freq * perf / 100;
|
||||||
|
|
||||||
|
if (desired_freq <= freq) {
|
||||||
|
/* Find the closest available frequency, rounding down. */
|
||||||
|
for (i = 0; i < num_levels; i++)
|
||||||
|
if (levels[i].total_set.freq <= desired_freq)
|
||||||
|
break;
|
||||||
|
|
||||||
|
/* If we didn't find a relevant setting, use the lowest. */
|
||||||
|
if (i == num_levels)
|
||||||
|
i--;
|
||||||
|
} else {
|
||||||
|
/* Find the closest available frequency, rounding up. */
|
||||||
|
for (i = num_levels - 1; i >= 0; i--)
|
||||||
|
if (levels[i].total_set.freq >= desired_freq)
|
||||||
|
break;
|
||||||
|
|
||||||
|
/* If we didn't find a relevant setting, use the highest. */
|
||||||
|
if (i == -1)
|
||||||
|
i++;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* If we're going to the highest frequency, restore the old setting. */
|
||||||
|
if (i == 0) {
|
||||||
|
error = acpi_tz_cpufreq_restore(sc);
|
||||||
|
if (error == 0)
|
||||||
|
sc->tz_cooling_active = FALSE;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* If we are going to a new frequency, activate it. */
|
||||||
|
if (levels[i].total_set.freq != freq) {
|
||||||
|
ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
|
||||||
|
"temperature %d.%dC: %screasing clock speed "
|
||||||
|
"from %d MHz to %d MHz\n",
|
||||||
|
TZ_KELVTOC(sc->tz_temperature),
|
||||||
|
(freq > levels[i].total_set.freq) ? "de" : "in",
|
||||||
|
freq, levels[i].total_set.freq);
|
||||||
|
error = CPUFREQ_SET(dev, &levels[i], CPUFREQ_PRIO_KERN);
|
||||||
|
if (error == 0)
|
||||||
|
sc->tz_cooling_updated = TRUE;
|
||||||
|
}
|
||||||
|
|
||||||
|
out:
|
||||||
|
if (levels)
|
||||||
|
free(levels, M_TEMP);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Passive cooling thread; monitors current temperature according to the
|
||||||
|
* cooling interval and calculates whether to scale back CPU frequency.
|
||||||
|
*/
|
||||||
|
static void
|
||||||
|
acpi_tz_cooling_thread(void *arg)
|
||||||
|
{
|
||||||
|
struct acpi_tz_softc *sc;
|
||||||
|
int error, perf, temperature;
|
||||||
|
|
||||||
|
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
|
||||||
|
|
||||||
|
sc = (struct acpi_tz_softc *)arg;
|
||||||
|
|
||||||
|
temperature = sc->tz_temperature;
|
||||||
|
while (sc->tz_cooling_enabled) {
|
||||||
|
if (sc->tz_temperature >= sc->tz_zone.psv)
|
||||||
|
sc->tz_cooling_active = TRUE;
|
||||||
|
if (sc->tz_cooling_active) {
|
||||||
|
perf = sc->tz_zone.tc1 * (sc->tz_temperature - temperature) +
|
||||||
|
sc->tz_zone.tc2 * (sc->tz_temperature - sc->tz_zone.psv);
|
||||||
|
perf /= 10;
|
||||||
|
|
||||||
|
if (perf != 0) {
|
||||||
|
error = acpi_tz_cpufreq_update(sc, perf);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If error and not simply a higher priority setting was
|
||||||
|
* active, disable cooling.
|
||||||
|
*/
|
||||||
|
if (error != 0 && error != EPERM) {
|
||||||
|
device_printf(sc->tz_dev,
|
||||||
|
"failed to set new freq, disabling passive cooling\n");
|
||||||
|
sc->tz_cooling_enabled = FALSE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
temperature = sc->tz_temperature;
|
||||||
|
tsleep(&sc->tz_cooling_proc, PZERO, "cooling",
|
||||||
|
hz * sc->tz_zone.tsp / 10);
|
||||||
|
}
|
||||||
|
if (sc->tz_cooling_active) {
|
||||||
|
acpi_tz_cpufreq_restore(sc);
|
||||||
|
sc->tz_cooling_active = FALSE;
|
||||||
|
}
|
||||||
|
ACPI_LOCK(thermal);
|
||||||
|
sc->tz_cooling_proc = NULL;
|
||||||
|
ACPI_UNLOCK(thermal);
|
||||||
|
kthread_exit(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* TODO: We ignore _PSL (list of cooling devices) since cpufreq enumerates
|
||||||
|
* all CPUs for us. However, it's possible in the future _PSL will
|
||||||
|
* reference non-CPU devices so we may want to support it then.
|
||||||
|
*/
|
||||||
|
static int
|
||||||
|
acpi_tz_cooling_is_available(struct acpi_tz_softc *sc)
|
||||||
|
{
|
||||||
|
return (sc->tz_zone.tc1 != -1 && sc->tz_zone.tc2 != -1 &&
|
||||||
|
sc->tz_zone.tsp != -1 && sc->tz_zone.tsp != 0 &&
|
||||||
|
sc->tz_zone.psv != -1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int
|
||||||
|
acpi_tz_cooling_thread_start(struct acpi_tz_softc *sc)
|
||||||
|
{
|
||||||
|
int error;
|
||||||
|
char name[16];
|
||||||
|
|
||||||
|
error = 0;
|
||||||
|
ACPI_LOCK(thermal);
|
||||||
|
if (sc->tz_cooling_proc == NULL) {
|
||||||
|
snprintf(name, sizeof(name), "acpi_cooling%d",
|
||||||
|
device_get_unit(sc->tz_dev));
|
||||||
|
error = kthread_create(acpi_tz_cooling_thread, sc,
|
||||||
|
&sc->tz_cooling_proc, RFHIGHPID, 0, name);
|
||||||
|
if (error != 0)
|
||||||
|
device_printf(sc->tz_dev, "could not create thread - %d", error);
|
||||||
|
}
|
||||||
|
ACPI_UNLOCK(thermal);
|
||||||
|
return (error);
|
||||||
|
}
|
||||||
|
|
Loading…
Reference in a new issue