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/*-
* Copyright (c) 2008, 2009 Rui Paulo <rpaulo@FreeBSD.org>
* Copyright (c) 2009 Norikatsu Shigemura <nork@FreeBSD.org>
* Copyright (c) 2009 Jung-uk Kim <jkim@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Driver for the AMD CPU on-die thermal sensors for Family 0Fh/10h/11h procs.
* Initially based on the k8temp Linux driver.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/amdtemp/amdtemp.c 197205 2009-09-14 23:08:19Z jkim $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/sysctl.h>
#include <sys/systm.h>
#include <machine/cpufunc.h>
#include <machine/md_var.h>
#include <machine/specialreg.h>
#include <dev/pci/pcivar.h>
typedef enum {
SENSOR0_CORE0,
SENSOR0_CORE1,
SENSOR1_CORE0,
SENSOR1_CORE1,
CORE0,
CORE1
} amdsensor_t;
struct amdtemp_softc {
device_t sc_dev;
int sc_ncores;
int sc_ntemps;
int sc_flags;
#define AMDTEMP_FLAG_DO_QUIRK 0x01 /* DiodeOffset may be incorrect. */
#define AMDTEMP_FLAG_DO_ZERO 0x02 /* DiodeOffset starts from 0C. */
#define AMDTEMP_FLAG_DO_SIGN 0x04 /* DiodeOffsetSignBit is present. */
#define AMDTEMP_FLAG_CS_SWAP 0x08 /* ThermSenseCoreSel is inverted. */
#define AMDTEMP_FLAG_CT_10BIT 0x10 /* CurTmp is 10-bit wide. */
int32_t (*sc_gettemp)(device_t, amdsensor_t);
struct sysctl_oid *sc_sysctl_cpu[MAXCPU];
struct intr_config_hook sc_ich;
};
#define VENDORID_AMD 0x1022
#define DEVICEID_AMD_MISC0F 0x1103
#define DEVICEID_AMD_MISC10 0x1203
#define DEVICEID_AMD_MISC11 0x1303
static struct amdtemp_product {
uint16_t amdtemp_vendorid;
uint16_t amdtemp_deviceid;
} amdtemp_products[] = {
{ VENDORID_AMD, DEVICEID_AMD_MISC0F },
{ VENDORID_AMD, DEVICEID_AMD_MISC10 },
{ VENDORID_AMD, DEVICEID_AMD_MISC11 },
{ 0, 0 }
};
/*
* Reported Temperature Control Register (Family 10h/11h only)
*/
#define AMDTEMP_REPTMP_CTRL 0xa4
/*
* Thermaltrip Status Register
*/
#define AMDTEMP_THERMTP_STAT 0xe4
#define AMDTEMP_TTSR_SELCORE 0x04 /* Family 0Fh only */
#define AMDTEMP_TTSR_SELSENSOR 0x40 /* Family 0Fh only */
/*
* CPU Family/Model Register
*/
#define AMDTEMP_CPUID 0xfc
/*
* Device methods.
*/
static void amdtemp_identify(driver_t *driver, device_t parent);
static int amdtemp_probe(device_t dev);
static int amdtemp_attach(device_t dev);
static void amdtemp_intrhook(void *arg);
static int amdtemp_detach(device_t dev);
static int amdtemp_match(device_t dev);
static int32_t amdtemp_gettemp0f(device_t dev, amdsensor_t sensor);
static int32_t amdtemp_gettemp(device_t dev, amdsensor_t sensor);
static int amdtemp_sysctl(SYSCTL_HANDLER_ARGS);
static device_method_t amdtemp_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, amdtemp_identify),
DEVMETHOD(device_probe, amdtemp_probe),
DEVMETHOD(device_attach, amdtemp_attach),
DEVMETHOD(device_detach, amdtemp_detach),
{0, 0}
};
static driver_t amdtemp_driver = {
"amdtemp",
amdtemp_methods,
sizeof(struct amdtemp_softc),
};
static devclass_t amdtemp_devclass;
DRIVER_MODULE(amdtemp, hostb, amdtemp_driver, amdtemp_devclass, NULL, NULL);
static int
amdtemp_match(device_t dev)
{
int i;
uint16_t vendor, devid;
vendor = pci_get_vendor(dev);
devid = pci_get_device(dev);
for (i = 0; amdtemp_products[i].amdtemp_vendorid != 0; i++) {
if (vendor == amdtemp_products[i].amdtemp_vendorid &&
devid == amdtemp_products[i].amdtemp_deviceid)
return (1);
}
return (0);
}
static void
amdtemp_identify(driver_t *driver, device_t parent)
{
device_t child;
/* Make sure we're not being doubly invoked. */
if (device_find_child(parent, "amdtemp", -1) != NULL)
return;
if (amdtemp_match(parent)) {
child = device_add_child(parent, "amdtemp", -1);
if (child == NULL)
device_printf(parent, "add amdtemp child failed\n");
}
}
static int
amdtemp_probe(device_t dev)
{
uint32_t family, model;
if (resource_disabled("amdtemp", 0))
return (ENXIO);
family = CPUID_TO_FAMILY(cpu_id);
model = CPUID_TO_MODEL(cpu_id);
switch (family) {
case 0x0f:
if ((model == 0x04 && (cpu_id & CPUID_STEPPING) == 0) ||
(model == 0x05 && (cpu_id & CPUID_STEPPING) <= 1))
return (ENXIO);
break;
case 0x10:
case 0x11:
break;
default:
return (ENXIO);
}
device_set_desc(dev, "AMD CPU On-Die Thermal Sensors");
return (BUS_PROBE_GENERIC);
}
static int
amdtemp_attach(device_t dev)
{
struct amdtemp_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *sysctlctx;
struct sysctl_oid *sysctlnode;
uint32_t regs[4];
uint32_t cpuid, family, model;
/*
* Errata #154: Incorect Diode Offset
*/
if (cpu_id == 0x20f32) {
do_cpuid(0x80000001, regs);
if ((regs[1] & 0xfff) == 0x2c)
sc->sc_flags |= AMDTEMP_FLAG_DO_QUIRK;
}
/*
* CPUID Register is available from Revision F.
*/
family = CPUID_TO_FAMILY(cpu_id);
model = CPUID_TO_MODEL(cpu_id);
if (family != 0x0f || model >= 0x40) {
cpuid = pci_read_config(dev, AMDTEMP_CPUID, 4);
family = CPUID_TO_FAMILY(cpuid);
model = CPUID_TO_MODEL(cpuid);
}
switch (family) {
case 0x0f:
/*
* Thermaltrip Status Register
*
* - DiodeOffsetSignBit
*
* Revision D & E: bit 24
* Other: N/A
*
* - ThermSenseCoreSel
*
* Revision F & G: 0 - Core1, 1 - Core0
* Other: 0 - Core0, 1 - Core1
*
* - CurTmp
*
* Revision G: bits 23-14
* Other: bits 23-16
*
* XXX According to the BKDG, CurTmp, ThermSenseSel and
* ThermSenseCoreSel bits were introduced in Revision F
* but CurTmp seems working fine as early as Revision C.
* However, it is not clear whether ThermSenseSel and/or
* ThermSenseCoreSel work in undocumented cases as well.
* In fact, the Linux driver suggests it may not work but
* we just assume it does until we find otherwise.
*/
if (model < 0x40) {
sc->sc_flags |= AMDTEMP_FLAG_DO_ZERO;
if (model >= 0x10)
sc->sc_flags |= AMDTEMP_FLAG_DO_SIGN;
} else {
sc->sc_flags |= AMDTEMP_FLAG_CS_SWAP;
if (model >= 0x60 && model != 0xc1)
sc->sc_flags |= AMDTEMP_FLAG_CT_10BIT;
}
/*
* There are two sensors per core.
*/
sc->sc_ntemps = 2;
sc->sc_gettemp = amdtemp_gettemp0f;
break;
case 0x10:
case 0x11:
/*
* There is only one sensor per package.
*/
sc->sc_ntemps = 1;
sc->sc_gettemp = amdtemp_gettemp;
break;
}
/* Find number of cores per package. */
sc->sc_ncores = (amd_feature2 & AMDID2_CMP) != 0 ?
(cpu_procinfo2 & AMDID_CMP_CORES) + 1 : 1;
if (sc->sc_ncores > MAXCPU)
return (ENXIO);
if (bootverbose)
device_printf(dev, "Found %d cores and %d sensors.\n",
sc->sc_ncores,
sc->sc_ntemps > 1 ? sc->sc_ntemps * sc->sc_ncores : 1);
/*
* dev.amdtemp.N tree.
*/
sysctlctx = device_get_sysctl_ctx(dev);
sysctlnode = SYSCTL_ADD_NODE(sysctlctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"sensor0", CTLFLAG_RD, 0, "Sensor 0");
SYSCTL_ADD_PROC(sysctlctx,
SYSCTL_CHILDREN(sysctlnode),
OID_AUTO, "core0", CTLTYPE_INT | CTLFLAG_RD,
dev, SENSOR0_CORE0, amdtemp_sysctl, "IK",
"Sensor 0 / Core 0 temperature");
if (sc->sc_ntemps > 1) {
if (sc->sc_ncores > 1)
SYSCTL_ADD_PROC(sysctlctx,
SYSCTL_CHILDREN(sysctlnode),
OID_AUTO, "core1", CTLTYPE_INT | CTLFLAG_RD,
dev, SENSOR0_CORE1, amdtemp_sysctl, "IK",
"Sensor 0 / Core 1 temperature");
sysctlnode = SYSCTL_ADD_NODE(sysctlctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO,
"sensor1", CTLFLAG_RD, 0, "Sensor 1");
SYSCTL_ADD_PROC(sysctlctx,
SYSCTL_CHILDREN(sysctlnode),
OID_AUTO, "core0", CTLTYPE_INT | CTLFLAG_RD,
dev, SENSOR1_CORE0, amdtemp_sysctl, "IK",
"Sensor 1 / Core 0 temperature");
if (sc->sc_ncores > 1)
SYSCTL_ADD_PROC(sysctlctx,
SYSCTL_CHILDREN(sysctlnode),
OID_AUTO, "core1", CTLTYPE_INT | CTLFLAG_RD,
dev, SENSOR1_CORE1, amdtemp_sysctl, "IK",
"Sensor 1 / Core 1 temperature");
}
/*
* Try to create dev.cpu sysctl entries and setup intrhook function.
* This is needed because the cpu driver may be loaded late on boot,
* after us.
*/
amdtemp_intrhook(dev);
sc->sc_ich.ich_func = amdtemp_intrhook;
sc->sc_ich.ich_arg = dev;
if (config_intrhook_establish(&sc->sc_ich) != 0) {
device_printf(dev, "config_intrhook_establish failed!\n");
return (ENXIO);
}
return (0);
}
void
amdtemp_intrhook(void *arg)
{
struct amdtemp_softc *sc;
struct sysctl_ctx_list *sysctlctx;
device_t dev = (device_t)arg;
device_t acpi, cpu, nexus;
amdsensor_t sensor;
int i;
sc = device_get_softc(dev);
/*
* dev.cpu.N.temperature.
*/
nexus = device_find_child(root_bus, "nexus", 0);
acpi = device_find_child(nexus, "acpi", 0);
for (i = 0; i < sc->sc_ncores; i++) {
if (sc->sc_sysctl_cpu[i] != NULL)
continue;
cpu = device_find_child(acpi, "cpu",
device_get_unit(dev) * sc->sc_ncores + i);
if (cpu != NULL) {
sysctlctx = device_get_sysctl_ctx(cpu);
sensor = sc->sc_ntemps > 1 ?
(i == 0 ? CORE0 : CORE1) : SENSOR0_CORE0;
sc->sc_sysctl_cpu[i] = SYSCTL_ADD_PROC(sysctlctx,
SYSCTL_CHILDREN(device_get_sysctl_tree(cpu)),
OID_AUTO, "temperature", CTLTYPE_INT | CTLFLAG_RD,
dev, sensor, amdtemp_sysctl, "IK",
"Current temparature");
}
}
if (sc->sc_ich.ich_arg != NULL)
config_intrhook_disestablish(&sc->sc_ich);
}
int
amdtemp_detach(device_t dev)
{
struct amdtemp_softc *sc = device_get_softc(dev);
int i;
for (i = 0; i < sc->sc_ncores; i++)
if (sc->sc_sysctl_cpu[i] != NULL)
sysctl_remove_oid(sc->sc_sysctl_cpu[i], 1, 0);
/* NewBus removes the dev.amdtemp.N tree by itself. */
return (0);
}
static int
amdtemp_sysctl(SYSCTL_HANDLER_ARGS)
{
device_t dev = (device_t)arg1;
struct amdtemp_softc *sc = device_get_softc(dev);
amdsensor_t sensor = (amdsensor_t)arg2;
int32_t auxtemp[2], temp;
int error;
switch (sensor) {
case CORE0:
auxtemp[0] = sc->sc_gettemp(dev, SENSOR0_CORE0);
auxtemp[1] = sc->sc_gettemp(dev, SENSOR1_CORE0);
temp = imax(auxtemp[0], auxtemp[1]);
break;
case CORE1:
auxtemp[0] = sc->sc_gettemp(dev, SENSOR0_CORE1);
auxtemp[1] = sc->sc_gettemp(dev, SENSOR1_CORE1);
temp = imax(auxtemp[0], auxtemp[1]);
break;
default:
temp = sc->sc_gettemp(dev, sensor);
break;
}
error = sysctl_handle_int(oidp, &temp, 0, req);
return (error);
}
#define AMDTEMP_ZERO_C_TO_K 2732
static int32_t
amdtemp_gettemp0f(device_t dev, amdsensor_t sensor)
{
struct amdtemp_softc *sc = device_get_softc(dev);
uint32_t mask, temp;
int32_t diode_offset, offset;
uint8_t cfg, sel;
/* Set Sensor/Core selector. */
sel = 0;
switch (sensor) {
case SENSOR1_CORE0:
sel |= AMDTEMP_TTSR_SELSENSOR;
/* FALLTHROUGH */
case SENSOR0_CORE0:
case CORE0:
if ((sc->sc_flags & AMDTEMP_FLAG_CS_SWAP) != 0)
sel |= AMDTEMP_TTSR_SELCORE;
break;
case SENSOR1_CORE1:
sel |= AMDTEMP_TTSR_SELSENSOR;
/* FALLTHROUGH */
case SENSOR0_CORE1:
case CORE1:
if ((sc->sc_flags & AMDTEMP_FLAG_CS_SWAP) == 0)
sel |= AMDTEMP_TTSR_SELCORE;
break;
}
cfg = pci_read_config(dev, AMDTEMP_THERMTP_STAT, 1);
cfg &= ~(AMDTEMP_TTSR_SELSENSOR | AMDTEMP_TTSR_SELCORE);
pci_write_config(dev, AMDTEMP_THERMTP_STAT, cfg | sel, 1);
/* CurTmp starts from -49C. */
offset = AMDTEMP_ZERO_C_TO_K - 490;
/* Adjust offset if DiodeOffset is set and valid. */
temp = pci_read_config(dev, AMDTEMP_THERMTP_STAT, 4);
diode_offset = (temp >> 8) & 0x3f;
if ((sc->sc_flags & AMDTEMP_FLAG_DO_ZERO) != 0) {
if ((sc->sc_flags & AMDTEMP_FLAG_DO_SIGN) != 0 &&
((temp >> 24) & 0x1) != 0)
diode_offset *= -1;
if ((sc->sc_flags & AMDTEMP_FLAG_DO_QUIRK) != 0 &&
((temp >> 25) & 0xf) <= 2)
diode_offset += 10;
offset += diode_offset * 10;
} else if (diode_offset != 0)
offset += (diode_offset - 11) * 10;
mask = (sc->sc_flags & AMDTEMP_FLAG_CT_10BIT) != 0 ? 0x3ff : 0x3fc;
temp = ((temp >> 14) & mask) * 5 / 2 + offset;
return (temp);
}
static int32_t
amdtemp_gettemp(device_t dev, amdsensor_t sensor)
{
uint32_t temp;
int32_t diode_offset, offset;
/* CurTmp starts from 0C. */
offset = AMDTEMP_ZERO_C_TO_K;
/* Adjust offset if DiodeOffset is set and valid. */
temp = pci_read_config(dev, AMDTEMP_THERMTP_STAT, 4);
diode_offset = (temp >> 8) & 0x7f;
if (diode_offset > 0 && diode_offset < 0x40)
offset += (diode_offset - 11) * 10;
temp = pci_read_config(dev, AMDTEMP_REPTMP_CTRL, 4);
temp = ((temp >> 21) & 0x7ff) * 5 / 4 + offset;
return (temp);
}