319 lines
9.4 KiB
C
319 lines
9.4 KiB
C
/*
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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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{ PCI_DEV(0x8086, 0x9df9),
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PCI_DESCR("Cannon Lake PCH Thermal Controller")},
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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",
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"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) {
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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, "talv", CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_REG_TALV,
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pchtherm_temp_sysctl, "IK",
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"Alart Low temperature");
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}
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if (!(sc->ctten& PCHTHERM_GEN_LOCKDOWN) ||
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sc->ctten& PCHTHERM_GEN_ENABLE) {
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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, "ctt",
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CTLTYPE_INT |CTLFLAG_RD,
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sc, PCHTHERM_REG_CTT,
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pchtherm_temp_sysctl, "IK",
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"Catastrophic Trip Point");
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}
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return 0;
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}
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static int pchtherm_detach(device_t dev)
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{
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struct pchtherm_softc *sc = device_get_softc(dev);
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bus_release_resource(dev, SYS_RES_MEMORY, sc->tbarrid, sc->tbar);
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return 0;
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}
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static device_method_t pchtherm_methods[] =
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{
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DEVMETHOD(device_probe, pchtherm_probe),
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DEVMETHOD(device_attach, pchtherm_attach),
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DEVMETHOD(device_detach, pchtherm_detach),
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DEVMETHOD_END
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};
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static driver_t pchtherm_driver = {
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"pchtherm",
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pchtherm_methods,
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sizeof(struct pchtherm_softc)
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};
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static devclass_t pchtherm_devclass;
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DRIVER_MODULE(pchtherm, pci, pchtherm_driver, pchtherm_devclass, 0, 0);
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PCI_PNP_INFO(pchtherm_devices);
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