d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add support for _CR3 critical standby (S3) threshold.

Browse Source 
Along with _PSV, _HOT, and _CRT, ACPI supports the _CR3 threshold
which specifies a temperature above which a system should transition
to the S3 standby state.

On FreeBSD, this is more useful than _HOT, which specifies the S4
transition threshold temperature (since FreeBSD does not generally
support the S4 state), or, in many cases, _CRT, since after
transitioning to S3 the system can cool and then be resumed.

Reviewed by:	jhb, bcr (manpages)
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D35980
This commit is contained in:
Cyrus Rahman 2022-11-18 10:30:30 -08:00 committed by John Baldwin
parent 20a66ab4bf
commit b8a0dfb17e
2 changed files with 25 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
share/man/man4/acpi_thermal.4
View File

@ -24,7 +24,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd March 17, 2007
.Dd November 21, 2022
.Dt ACPI_THERMAL 4
.Os
.Sh NAME
@ -84,6 +84,9 @@ Current temperature for this zone.
.It Va hw.acpi.thermal.tz%d._PSV
Temperature to start passive cooling by throttling down CPU, etc.
This value can be overridden by the user.
.It Va hw.acpi.thermal.tz%d._CR3
Temperature to start critical suspend to RAM (S3).
This value can be overridden by the user.
.It Va hw.acpi.thermal.tz%d._HOT
Temperature to start critical suspend to disk (S4).
This value can be overridden by the user.

26
sys/dev/acpica/acpi_thermal.c
View File

@ -60,7 +60,7 @@ ACPI_MODULE_NAME("THERMAL")
#define TZ_NOTIFY_TEMPERATURE 0x80 /* Temperature changed. */
#define TZ_NOTIFY_LEVELS 0x81 /* Cooling levels changed. */
#define TZ_NOTIFY_DEVICES 0x82 /* Device lists changed. */
#define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT reached. */
#define TZ_NOTIFY_CRITICAL 0xcc /* Fake notify that _CRT/_HOT/_CR3 reached. */
/* Check for temperature changes every 10 seconds by default */
#define TZ_POLLRATE 10
@ -78,6 +78,7 @@ struct acpi_tz_zone {
ACPI_BUFFER al[TZ_NUMLEVELS];
int crt;
int hot;
int cr3;
ACPI_BUFFER psl;
int psv;
int tc1;
@ -97,8 +98,9 @@ struct acpi_tz_softc {
int tz_thflags; /*Current temp-related flags*/
#define TZ_THFLAG_NONE 0
#define TZ_THFLAG_PSV (1<<0)
#define TZ_THFLAG_HOT (1<<2)
#define TZ_THFLAG_CRT (1<<3)
#define TZ_THFLAG_CR3 (1<<2)
#define TZ_THFLAG_HOT (1<<3)
#define TZ_THFLAG_CRT (1<<4)
int tz_flags;
#define TZ_FLAG_NO_SCP (1<<0) /*No _SCP method*/
#define TZ_FLAG_GETPROFILE (1<<1) /*Get power_profile in timeout*/
@ -281,6 +283,10 @@ acpi_tz_attach(device_t dev)
OID_AUTO, "_PSV", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
offsetof(struct acpi_tz_softc, tz_zone.psv), acpi_tz_temp_sysctl, "IK",
"passive cooling temp setpoint");
SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
OID_AUTO, "_CR3", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
offsetof(struct acpi_tz_softc, tz_zone.cr3), acpi_tz_temp_sysctl, "IK",
"too warm temp setpoint (standby now)");
SYSCTL_ADD_PROC(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
OID_AUTO, "_HOT", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc,
offsetof(struct acpi_tz_softc, tz_zone.hot), acpi_tz_temp_sysctl, "IK",
@ -420,6 +426,7 @@ acpi_tz_establish(struct acpi_tz_softc *sc)
}
acpi_tz_getparam(sc, "_CRT", &sc->tz_zone.crt);
acpi_tz_getparam(sc, "_HOT", &sc->tz_zone.hot);
acpi_tz_getparam(sc, "_CR3", &sc->tz_zone.cr3);
sc->tz_zone.psl.Length = ACPI_ALLOCATE_BUFFER;
sc->tz_zone.psl.Pointer = NULL;
AcpiEvaluateObject(sc->tz_handle, "_PSL", NULL, &sc->tz_zone.psl);
@ -437,6 +444,7 @@ acpi_tz_establish(struct acpi_tz_softc *sc)
*/
acpi_tz_sanity(sc, &sc->tz_zone.crt, "_CRT");
acpi_tz_sanity(sc, &sc->tz_zone.hot, "_HOT");
acpi_tz_sanity(sc, &sc->tz_zone.cr3, "_CR3");
acpi_tz_sanity(sc, &sc->tz_zone.psv, "_PSV");
for (i = 0; i < TZ_NUMLEVELS; i++)
acpi_tz_sanity(sc, &sc->tz_zone.ac[i], "_ACx");
@ -494,6 +502,7 @@ acpi_tz_get_temperature(struct acpi_tz_softc *sc)
static void
acpi_tz_monitor(void *Context)
{
struct acpi_softc *acpi_sc;
struct acpi_tz_softc *sc;
struct timespec curtime;
int temp;
@ -544,6 +553,8 @@ acpi_tz_monitor(void *Context)
newflags = TZ_THFLAG_NONE;
if (sc->tz_zone.psv != -1 && temp >= sc->tz_zone.psv)
newflags |= TZ_THFLAG_PSV;
if (sc->tz_zone.cr3 != -1 && temp >= sc->tz_zone.cr3)
newflags |= TZ_THFLAG_CR3;
if (sc->tz_zone.hot != -1 && temp >= sc->tz_zone.hot)
newflags |= TZ_THFLAG_HOT;
if (sc->tz_zone.crt != -1 && temp >= sc->tz_zone.crt)
@ -603,13 +614,18 @@ acpi_tz_monitor(void *Context)
*
* If we're almost at that threshold, notify the user through devd(8).
*/
if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) {
if ((newflags & (TZ_THFLAG_CR3 | TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0) {
sc->tz_validchecks++;
if (sc->tz_validchecks == TZ_VALIDCHECKS) {
device_printf(sc->tz_dev,
"WARNING - current temperature (%d.%dC) exceeds safe limits\n",
TZ_KELVTOC(sc->tz_temperature));
shutdown_nice(RB_POWEROFF);
if ((newflags & (TZ_THFLAG_HOT | TZ_THFLAG_CRT)) != 0)
shutdown_nice(RB_POWEROFF);
else {
acpi_sc = acpi_device_get_parent_softc(sc->tz_dev);
acpi_ReqSleepState(acpi_sc, ACPI_STATE_S3);
}
} else if (sc->tz_validchecks == TZ_NOTIFYCOUNT)
acpi_UserNotify("Thermal", sc->tz_handle, TZ_NOTIFY_CRITICAL);
} else {