Add Platform Controller Hub built-in thermal management device driver.
Differential Revision: https://reviews.freebsd.org/D24077
This commit is contained in:
Takanori Watanabe
parent
e23fe873b2
commit
c30797873f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=359479
@ -404,6 +404,7 @@ MAN= aac.4 \
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pccard.4 \
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pccbb.4 \
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pcf.4 \
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${_pchtherm.4} \
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pci.4 \
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pcib.4 \
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pcic.4 \
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@ -815,6 +816,7 @@ _nvd.4= nvd.4
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_nvme.4= nvme.4
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_nvram.4= nvram.4
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_padlock.4= padlock.4
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_pchtherm.4= pchtherm.4
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_rr232x.4= rr232x.4
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_speaker.4= speaker.4
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_spkr.4= spkr.4
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117
share/man/man4/pchtherm.4
Normal file
117
share/man/man4/pchtherm.4
Normal file
@ -0,0 +1,117 @@
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.\"
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.\" Copyright (c) 2020 Takanori Watanabe <takawata@freebsd.org>
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd March 15, 2020
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.Dt pchtherm 4
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.Os
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.Sh NAME
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.Nm pchtherm
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.Nd Intel PCH thermal subsystem
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.Sh SYNOPSIS
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.Cd "device pci"
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.Cd "device pchtherm"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides access to sensor data and configuration
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installed in Intel PCH chipset.
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.Nm
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configuration register.
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.Pp
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The access to
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.Nm
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data is made via the
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.Xr sysctl 8
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interface:
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.Bd -literal
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dev.pchtherm.0.ctt: 115.0C
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dev.pchtherm.0.temperature: 28.5C
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dev.pchtherm.0.t2temp: 91.0C
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dev.pchtherm.0.t1temp: 86.0C
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dev.pchtherm.0.t0temp: 81.0C
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dev.pchtherm.0.tahv: 83.0C
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dev.pchtherm.0.talv: 30.0C
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dev.pchtherm.0.pmtime: 32
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dev.pchtherm.0.pmtemp: 50.0C
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dev.pchtherm.0.%parent: pci0
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dev.pchtherm.0.%pnpinfo: vendor=0x8086 device=0x9d31 subvendor=0x17aa subdevice=0x2256 class=0x118000
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dev.pchtherm.0.%location: slot=20 function=2 dbsf=pci0:0:20:2
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dev.pchtherm.0.%driver: pchtherm
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dev.pchtherm.0.%desc: Skylake PCH Thermal Subsystem
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dev.pchtherm.%parent:
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.Ed
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.Bl -tag -width ".Va dev.pchtherm.%d.pch_hot_level"
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.It Va dev.pchtherm.%d.temperature
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Is the read-only value of the current temperature read by the sensor.
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.It Va dev.pchtherm.%d.ctt
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When the system reaches this temperature, it will shut down.
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This will not appear when this feature is disabled and locked down.
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.It Va dev.pchtherm.%d.t0temp
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When temperature is under this value, system will be in T0 state.
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.It Va dev.pchtherm.%d.t1temp
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When temperature is over
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.Va t0temp
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and under this value, system will be in T1 state.
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.It Va dev.pchtherm.%d.t2temp
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When temperature is over
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.Va t1temp
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and under this value, system will be in T2 state.
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Over this value, system will be in T3 state.
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.It Va dev.pchtherm.%d.talv
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Lower alart value.
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This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
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.It Va dev.pchtherm.%d.tahv
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High alart value.
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This will not appear when sensor enable bit is locked down and the value is zero(which will show -50.0C).
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.It Va dev.pchtherm.%d.pmtemp
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Sensor Power management temperature.
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Under this temperature, sensor will idle during
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.Va pmtime
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second.
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.It Va dev.pchtherm.%d.pmtime
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Sensor idle duration when low temperature.
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.It Va dev.pchtherm.%d.pch_hot_level
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When temperature is higher than this value, PCHHOT# pin will assert.
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This value is not appear when this feature is disabled and locked down.
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.El
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.Pp
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Please check the PCH datasheets for more details.
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.Pp
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.Sh CAVEAT
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All values are read-only.
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And it do not support event interrupt for now.
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.Sh SEE ALSO
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.Xr sysctl 8
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Fx 13.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver and this manual page were written by
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.An Takanori Watanabe Aq Mt takawata@FreeBSD.org .
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316
sys/dev/intel/pchtherm.c
Normal file
316
sys/dev/intel/pchtherm.c
Normal file
@ -0,0 +1,316 @@
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/*
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* Copyright (c) 2020 Takanori Watanabe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/errno.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/bus.h>
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#include <machine/bus.h>
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#include <sys/rman.h>
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#include <machine/resource.h>
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#include <dev/pci/pcivar.h>
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#include <dev/pci/pcireg.h>
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#define PCHTHERM_REG_TEMP 0
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#define PCHTHERM_REG_TSC 4
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#define PCHTHERM_REG_TSS 6
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#define PCHTHERM_REG_TSEL 8
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#define PCHTHERM_REG_TSREL 0xa
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#define PCHTHERM_REG_TSMIC 0xc
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#define PCHTHERM_REG_CTT 0x10
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#define PCHTHERM_REG_TAHV 0x14
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#define PCHTHERM_REG_TALV 0x18
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#define PCHTHERM_REG_TSPM 0x1c
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#define PCHTHERM_REG_TL 0x40
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#define PCHTHERM_REG_TL2 0x50
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#define PCHTHERM_REG_PHL 0x60
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#define PCHTHERM_REG_PHLC 0x62
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#define PCHTHERM_REG_TAS 0x80
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#define PCHTHERM_REG_TSPIEN 0x82
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#define PCHTHERM_REG_TSGPEN 0x84
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#define PCHTHERM_REG_TCFD 0xf0
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#define PCHTHERM_GEN_LOCKDOWN 0x80
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#define PCHTHERM_GEN_ENABLE 1
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#define PCHTHERM_TEMP_FACTOR 5
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#define PCHTHERM_TEMP_ZERO 2231
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#define PCHTHERM_TEMP_MASK 0x1ff
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#define PCHTHERM_TL_T0 0
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#define PCHTHERM_TL_T1 10
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#define PCHTHERM_TL_T2 20
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#define PCHTHERM_TEMP_TO_IK(val) (((val) & PCHTHERM_TEMP_MASK) * \
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PCHTHERM_TEMP_FACTOR + \
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PCHTHERM_TEMP_ZERO)
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struct pchtherm_softc
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{
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int tbarrid;
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struct resource *tbar;
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int enable;
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int ctten;
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int pmtemp;
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unsigned int pmtime;
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};
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static const struct pci_device_table pchtherm_devices[] =
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{
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{ PCI_DEV(0x8086, 0x9c24),
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PCI_DESCR("Haswell Thermal Subsystem")},
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{ PCI_DEV(0x8086, 0x8c24),
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PCI_DESCR("Haswell Thermal Subsystem")},
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{ PCI_DEV(0x8086, 0x9ca4),
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PCI_DESCR("Wildcat Point Thermal Subsystem")},
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{ PCI_DEV(0x8086, 0x9d31),
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PCI_DESCR("Skylake PCH Thermal Subsystem")},
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{ PCI_DEV(0x8086, 0xa131),
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PCI_DESCR("Skylake PCH 100 Thermal Subsystem")},
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};
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static int pchtherm_probe(device_t dev)
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{
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const struct pci_device_table *tbl;
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tbl = PCI_MATCH(dev, pchtherm_devices);
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if (tbl == NULL)
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return (ENXIO);
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device_set_desc(dev, tbl->descr);
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return (BUS_PROBE_DEFAULT);
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}
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static int pchtherm_tltemp_sysctl(SYSCTL_HANDLER_ARGS)
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{
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struct pchtherm_softc *sc = oidp->oid_arg1;
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int regshift = oidp->oid_arg2;
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int temp;
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temp = bus_read_4(sc->tbar, PCHTHERM_REG_TL);
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temp >>= regshift;
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temp = PCHTHERM_TEMP_TO_IK(temp);
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return sysctl_handle_int(oidp, &temp, 0, req);
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}
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static int pchtherm_temp_sysctl(SYSCTL_HANDLER_ARGS)
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{
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struct pchtherm_softc *sc = oidp->oid_arg1;
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int regoff = oidp->oid_arg2;
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int temp;
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temp = bus_read_2(sc->tbar, regoff);
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temp = PCHTHERM_TEMP_TO_IK(temp);
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return sysctl_handle_int(oidp, &temp, 0, req);
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}
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#define FLAG_PRINT(dev, str, val) device_printf \
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(dev, str " %s %sable\n", \
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((val) & 0x80)? "Locked" : "", \
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((val) & 0x1)? "En" : "Dis")
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static int pchtherm_attach(device_t dev)
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{
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struct pchtherm_softc *sc = device_get_softc(dev);
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unsigned int val;
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int flag;
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int temp;
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sc->tbarrid = PCIR_BAR(0);
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sc->tbar = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->tbarrid, RF_ACTIVE|RF_SHAREABLE);
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if (sc->tbar == NULL) {
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return (ENOMEM);
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}
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sc->enable = bus_read_1(sc->tbar, PCHTHERM_REG_TSEL);
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if (!(sc->enable & PCHTHERM_GEN_ENABLE )) {
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if (sc->enable & PCHTHERM_GEN_LOCKDOWN) {
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device_printf(dev, "Sensor not available\n");
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return 0;
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} else {
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device_printf(dev, "Enabling Sensor\n");
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bus_write_1(sc->tbar, PCHTHERM_REG_TSEL,
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PCHTHERM_GEN_ENABLE);
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sc->enable = bus_read_1(sc->tbar, PCHTHERM_REG_TSEL);
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if (!(sc->enable & PCHTHERM_REG_TSEL)){
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device_printf(dev, "Sensor enable failed\n");
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return 0;
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}
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}
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}
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sc->ctten = bus_read_1(sc->tbar, PCHTHERM_REG_TSC);
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if (bootverbose) {
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FLAG_PRINT(dev, "Catastrophic Power Down", sc->ctten);
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}
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val = bus_read_1(sc->tbar, PCHTHERM_REG_TSREL);
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if (bootverbose) {
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FLAG_PRINT(dev, "SMBus report", val);
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}
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val = bus_read_1(sc->tbar, PCHTHERM_REG_TSC);
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if (bootverbose) {
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FLAG_PRINT(dev, "SMI on alert", val);
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}
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val = bus_read_2(sc->tbar, PCHTHERM_REG_TSPM);
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flag = val >> 13;
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if (bootverbose) {
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device_printf(dev, "TSPM: %b\n",
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flag, "\20\3Lock\2DTSS0EN\1DSSOC0");
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device_printf(dev, "MAX Thermal Sensor Shutdown Time %ds\n",
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1<<((val>>9)&7));
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}
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temp = val & PCHTHERM_TEMP_MASK;
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sc->pmtemp = PCHTHERM_TEMP_TO_IK(temp);
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sc->pmtime = 1<<((val>>9)&7);
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "pmtemp", CTLTYPE_INT|CTLFLAG_RD,
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sc, PCHTHERM_REG_TSPM, pchtherm_temp_sysctl,
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"IK", "Thermal sensor idle temperature");
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SYSCTL_ADD_U32(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "pmtime", CTLFLAG_RD,
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&sc->pmtime, 0,"Thermal sensor idle duration");
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val = bus_read_4(sc->tbar, PCHTHERM_REG_TL);
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flag = val>>29;
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if (bootverbose) {
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device_printf(dev, "Throttling %b\n",
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flag, "\20\3Lock\2TT13EN\1TTEN");
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}
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "t0temp", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_TL_T0, pchtherm_tltemp_sysctl,
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"IK", "T0 temperature");
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "t1temp", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_TL_T1, pchtherm_tltemp_sysctl,
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"IK", "T1 temperature");
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "t2temp", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_TL_T2, pchtherm_tltemp_sysctl,
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"IK", "T2 temperature");
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val = bus_read_2(sc->tbar, PCHTHERM_REG_TL2);
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if (bootverbose) {
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flag = val >>14;
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device_printf(dev, "TL2 flag %b\n",
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flag, "\20\1PMCTEN\2Lock");
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}
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/* If PHL is disable and lockdown, don't export it.*/
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val = bus_read_2(sc->tbar, PCHTHERM_REG_PHLC);
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val <<= 16;
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val |= bus_read_2(sc->tbar, PCHTHERM_REG_PHL);
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if ((val & 0x10000) != 0x10000) {
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "pch_hot_level",
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CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_REG_PHL,
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pchtherm_temp_sysctl, "IK",
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"PCH Hot level Temperature");
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}
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "temperature", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_REG_TEMP,
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pchtherm_temp_sysctl, "IK", "Current temperature");
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/*
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* If sensor enable bit is locked down, there is no way to change
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* alart values effectively.
|
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*/
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if (!(sc->enable & PCHTHERM_GEN_LOCKDOWN) ||
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bus_read_2(sc->tbar, PCHTHERM_REG_TAHV) != 0) {
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SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
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OID_AUTO, "tahv", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_REG_TAHV,
|
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pchtherm_temp_sysctl, "IK",
|
||||
"Alart High temperature");
|
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}
|
||||
|
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if (!(sc->enable & PCHTHERM_GEN_LOCKDOWN) ||
|
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bus_read_2(sc->tbar, PCHTHERM_REG_TALV) != 0) {
|
||||
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
|
||||
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
|
||||
OID_AUTO, "talv", CTLTYPE_INT |CTLFLAG_RD,
|
||||
sc, PCHTHERM_REG_TALV,
|
||||
pchtherm_temp_sysctl, "IK",
|
||||
"Alart Low temperature");
|
||||
}
|
||||
if (!(sc->ctten& PCHTHERM_GEN_LOCKDOWN) ||
|
||||
sc->ctten& PCHTHERM_GEN_ENABLE) {
|
||||
SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev),
|
||||
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
|
||||
OID_AUTO, "ctt",
|
||||
CTLTYPE_INT |CTLFLAG_RD,
|
||||
sc, PCHTHERM_REG_CTT,
|
||||
pchtherm_temp_sysctl, "IK",
|
||||
"Catastrophic Trip Point");
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
static int pchtherm_detach(device_t dev)
|
||||
{
|
||||
struct pchtherm_softc *sc = device_get_softc(dev);
|
||||
bus_release_resource(dev, SYS_RES_MEMORY, sc->tbarrid, sc->tbar);
|
||||
|
||||
return 0;
|
||||
}
|
||||
static device_method_t pchtherm_methods[] =
|
||||
{
|
||||
DEVMETHOD(device_probe, pchtherm_probe),
|
||||
DEVMETHOD(device_attach, pchtherm_attach),
|
||||
DEVMETHOD(device_detach, pchtherm_detach),
|
||||
|
||||
DEVMETHOD_END
|
||||
};
|
||||
static driver_t pchtherm_driver = {
|
||||
"pchtherm",
|
||||
pchtherm_methods,
|
||||
sizeof(struct pchtherm_softc)
|
||||
};
|
||||
|
||||
static devclass_t pchtherm_devclass;
|
||||
DRIVER_MODULE(pchtherm, pci, pchtherm_driver, pchtherm_devclass, 0, 0);
|
||||
PCI_PNP_INFO(pchtherm_devices);
|
||||
@ -278,6 +278,7 @@ SUBDIR= \
|
||||
${_padlock} \
|
||||
${_padlock_rng} \
|
||||
${_pccard} \
|
||||
${_pchtherm} \
|
||||
${_pcfclock} \
|
||||
${_pf} \
|
||||
${_pflog} \
|
||||
@ -676,6 +677,7 @@ _padlock= padlock
|
||||
_padlock_rng= padlock_rng
|
||||
_rdrand_rng= rdrand_rng
|
||||
.endif
|
||||
_pchtherm = pchtherm
|
||||
_s3= s3
|
||||
_sdhci_acpi= sdhci_acpi
|
||||
_superio= superio
|
||||
|
||||
8
sys/modules/pchtherm/Makefile
Normal file
8
sys/modules/pchtherm/Makefile
Normal file
@ -0,0 +1,8 @@
|
||||
# $FreeBSD$
|
||||
|
||||
.PATH: ${SRCTOP}/sys/dev/intel
|
||||
KMOD= pchtherm
|
||||
SRCS= pchtherm.c
|
||||
SRCS+= device_if.h bus_if.h pci_if.h opt_platform.h
|
||||
|
||||
.include <bsd.kmod.mk>
|
||||
Loading…
Reference in New Issue
Block a user