AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity
f6cdb2928d
kernel_optimize_test/drivers/thermal/intel_soc_dts_iosf.c
Sascha Hauer 17e8351a77 thermal: consistently use int for temperatures 
The thermal code uses int, long and unsigned long for temperatures
in different places.

Using an unsigned type limits the thermal framework to positive
temperatures without need. Also several drivers currently will report
temperatures near UINT_MAX for temperatures below 0°C. This will probably
immediately shut the machine down due to overtemperature if started below
0°C.

'long' is 64bit on several architectures. This is not needed since INT_MAX °mC
is above the melting point of all known materials.

Consistently use a plain 'int' for temperatures throughout the thermal code and
the drivers. This only changes the places in the drivers where the temperature
is passed around as pointer, when drivers internally use another type this is
not changed.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Lukasz Majewski <l.majewski@samsung.com>
Reviewed-by: Darren Hart <dvhart@linux.intel.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Peter Feuerer <peter@piie.net>
Cc: Punit Agrawal <punit.agrawal@arm.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Jean Delvare <jdelvare@suse.de>
Cc: Peter Feuerer <peter@piie.net>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: linux-acpi@vger.kernel.org
Cc: platform-driver-x86@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-omap@vger.kernel.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: lm-sensors@lm-sensors.org
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
2015-08-03 23:15:50 +08:00

479 lines
12 KiB
C
Raw Blame History

/*
* intel_soc_dts_iosf.c
* Copyright (c) 2015, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <asm/iosf_mbi.h>
#include "intel_soc_dts_iosf.h"
#define SOC_DTS_OFFSET_ENABLE 0xB0
#define SOC_DTS_OFFSET_TEMP 0xB1
#define SOC_DTS_OFFSET_PTPS 0xB2
#define SOC_DTS_OFFSET_PTTS 0xB3
#define SOC_DTS_OFFSET_PTTSS 0xB4
#define SOC_DTS_OFFSET_PTMC 0x80
#define SOC_DTS_TE_AUX0 0xB5
#define SOC_DTS_TE_AUX1 0xB6
#define SOC_DTS_AUX0_ENABLE_BIT BIT(0)
#define SOC_DTS_AUX1_ENABLE_BIT BIT(1)
#define SOC_DTS_CPU_MODULE0_ENABLE_BIT BIT(16)
#define SOC_DTS_CPU_MODULE1_ENABLE_BIT BIT(17)
#define SOC_DTS_TE_SCI_ENABLE BIT(9)
#define SOC_DTS_TE_SMI_ENABLE BIT(10)
#define SOC_DTS_TE_MSI_ENABLE BIT(11)
#define SOC_DTS_TE_APICA_ENABLE BIT(14)
#define SOC_DTS_PTMC_APIC_DEASSERT_BIT BIT(4)
/* DTS encoding for TJ MAX temperature */
#define SOC_DTS_TJMAX_ENCODING 0x7F
/* Only 2 out of 4 is allowed for OSPM */
#define SOC_MAX_DTS_TRIPS 2
/* Mask for two trips in status bits */
#define SOC_DTS_TRIP_MASK 0x03
/* DTS0 and DTS 1 */
#define SOC_MAX_DTS_SENSORS 2
static int get_tj_max(u32 *tj_max)
{
u32 eax, edx;
u32 val;
int err;
err = rdmsr_safe(MSR_IA32_TEMPERATURE_TARGET, &eax, &edx);
if (err)
goto err_ret;
else {
val = (eax >> 16) & 0xff;
if (val)
*tj_max = val * 1000;
else {
err = -EINVAL;
goto err_ret;
}
}
return 0;
err_ret:
*tj_max = 0;
return err;
}
static int sys_get_trip_temp(struct thermal_zone_device *tzd, int trip,
int *temp)
{
int status;
u32 out;
struct intel_soc_dts_sensor_entry *dts;
struct intel_soc_dts_sensors *sensors;
dts = tzd->devdata;
sensors = dts->sensors;
mutex_lock(&sensors->dts_update_lock);
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTPS, &out);
mutex_unlock(&sensors->dts_update_lock);
if (status)
return status;
out = (out >> (trip * 8)) & SOC_DTS_TJMAX_ENCODING;
if (!out)
*temp = 0;
else
*temp = sensors->tj_max - out * 1000;
return 0;
}
static int update_trip_temp(struct intel_soc_dts_sensor_entry *dts,
int thres_index, int temp,
enum thermal_trip_type trip_type)
{
int status;
u32 temp_out;
u32 out;
u32 store_ptps;
u32 store_ptmc;
u32 store_te_out;
u32 te_out;
u32 int_enable_bit = SOC_DTS_TE_APICA_ENABLE;
struct intel_soc_dts_sensors *sensors = dts->sensors;
if (sensors->intr_type == INTEL_SOC_DTS_INTERRUPT_MSI)
int_enable_bit |= SOC_DTS_TE_MSI_ENABLE;
temp_out = (sensors->tj_max - temp) / 1000;
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTPS, &store_ptps);
if (status)
return status;
out = (store_ptps & ~(0xFF << (thres_index * 8)));
out |= (temp_out & 0xFF) << (thres_index * 8);
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTPS, out);
if (status)
return status;
pr_debug("update_trip_temp PTPS = %x\n", out);
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTMC, &out);
if (status)
goto err_restore_ptps;
store_ptmc = out;
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_TE_AUX0 + thres_index,
&te_out);
if (status)
goto err_restore_ptmc;
store_te_out = te_out;
/* Enable for CPU module 0 and module 1 */
out |= (SOC_DTS_CPU_MODULE0_ENABLE_BIT |
SOC_DTS_CPU_MODULE1_ENABLE_BIT);
if (temp) {
if (thres_index)
out |= SOC_DTS_AUX1_ENABLE_BIT;
else
out |= SOC_DTS_AUX0_ENABLE_BIT;
te_out |= int_enable_bit;
} else {
if (thres_index)
out &= ~SOC_DTS_AUX1_ENABLE_BIT;
else
out &= ~SOC_DTS_AUX0_ENABLE_BIT;
te_out &= ~int_enable_bit;
}
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTMC, out);
if (status)
goto err_restore_te_out;
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_TE_AUX0 + thres_index,
te_out);
if (status)
goto err_restore_te_out;
dts->trip_types[thres_index] = trip_type;
return 0;
err_restore_te_out:
iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTMC, store_te_out);
err_restore_ptmc:
iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTMC, store_ptmc);
err_restore_ptps:
iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTPS, store_ptps);
/* Nothing we can do if restore fails */
return status;
}
static int sys_set_trip_temp(struct thermal_zone_device *tzd, int trip,
int temp)
{
struct intel_soc_dts_sensor_entry *dts = tzd->devdata;
struct intel_soc_dts_sensors *sensors = dts->sensors;
int status;
if (temp > sensors->tj_max)
return -EINVAL;
mutex_lock(&sensors->dts_update_lock);
status = update_trip_temp(tzd->devdata, trip, temp,
dts->trip_types[trip]);
mutex_unlock(&sensors->dts_update_lock);
return status;
}
static int sys_get_trip_type(struct thermal_zone_device *tzd,
int trip, enum thermal_trip_type *type)
{
struct intel_soc_dts_sensor_entry *dts;
dts = tzd->devdata;
*type = dts->trip_types[trip];
return 0;
}
static int sys_get_curr_temp(struct thermal_zone_device *tzd,
int *temp)
{
int status;
u32 out;
struct intel_soc_dts_sensor_entry *dts;
struct intel_soc_dts_sensors *sensors;
dts = tzd->devdata;
sensors = dts->sensors;
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_TEMP, &out);
if (status)
return status;
out = (out & dts->temp_mask) >> dts->temp_shift;
out -= SOC_DTS_TJMAX_ENCODING;
*temp = sensors->tj_max - out * 1000;
return 0;
}
static struct thermal_zone_device_ops tzone_ops = {
.get_temp = sys_get_curr_temp,
.get_trip_temp = sys_get_trip_temp,
.get_trip_type = sys_get_trip_type,
.set_trip_temp = sys_set_trip_temp,
};
static int soc_dts_enable(int id)
{
u32 out;
int ret;
ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_ENABLE, &out);
if (ret)
return ret;
if (!(out & BIT(id))) {
out |= BIT(id);
ret = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_ENABLE, out);
if (ret)
return ret;
}
return ret;
}
static void remove_dts_thermal_zone(struct intel_soc_dts_sensor_entry *dts)
{
if (dts) {
iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_ENABLE, dts->store_status);
thermal_zone_device_unregister(dts->tzone);
}
}
static int add_dts_thermal_zone(int id, struct intel_soc_dts_sensor_entry *dts,
bool notification_support, int trip_cnt,
int read_only_trip_cnt)
{
char name[10];
int trip_count = 0;
int trip_mask = 0;
u32 store_ptps;
int ret;
int i;
/* Store status to restor on exit */
ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_ENABLE,
&dts->store_status);
if (ret)
goto err_ret;
dts->id = id;
dts->temp_mask = 0x00FF << (id * 8);
dts->temp_shift = id * 8;
if (notification_support) {
trip_count = min(SOC_MAX_DTS_TRIPS, trip_cnt);
trip_mask = BIT(trip_count - read_only_trip_cnt) - 1;
}
/* Check if the writable trip we provide is not used by BIOS */
ret = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTPS, &store_ptps);
if (ret)
trip_mask = 0;
else {
for (i = 0; i < trip_count; ++i) {
if (trip_mask & BIT(i))
if (store_ptps & (0xff << (i * 8)))
trip_mask &= ~BIT(i);
}
}
dts->trip_mask = trip_mask;
dts->trip_count = trip_count;
snprintf(name, sizeof(name), "soc_dts%d", id);
dts->tzone = thermal_zone_device_register(name,
trip_count,
trip_mask,
dts, &tzone_ops,
NULL, 0, 0);
if (IS_ERR(dts->tzone)) {
ret = PTR_ERR(dts->tzone);
goto err_ret;
}
ret = soc_dts_enable(id);
if (ret)
goto err_enable;
return 0;
err_enable:
thermal_zone_device_unregister(dts->tzone);
err_ret:
return ret;
}
int intel_soc_dts_iosf_add_read_only_critical_trip(
struct intel_soc_dts_sensors *sensors, int critical_offset)
{
int i, j;
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
for (j = 0; j < sensors->soc_dts[i].trip_count; ++j) {
if (!(sensors->soc_dts[i].trip_mask & BIT(j))) {
return update_trip_temp(&sensors->soc_dts[i], j,
sensors->tj_max - critical_offset,
THERMAL_TRIP_CRITICAL);
}
}
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_add_read_only_critical_trip);
void intel_soc_dts_iosf_interrupt_handler(struct intel_soc_dts_sensors *sensors)
{
u32 sticky_out;
int status;
u32 ptmc_out;
unsigned long flags;
spin_lock_irqsave(&sensors->intr_notify_lock, flags);
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTMC, &ptmc_out);
ptmc_out |= SOC_DTS_PTMC_APIC_DEASSERT_BIT;
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTMC, ptmc_out);
status = iosf_mbi_read(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_READ,
SOC_DTS_OFFSET_PTTSS, &sticky_out);
pr_debug("status %d PTTSS %x\n", status, sticky_out);
if (sticky_out & SOC_DTS_TRIP_MASK) {
int i;
/* reset sticky bit */
status = iosf_mbi_write(BT_MBI_UNIT_PMC, BT_MBI_BUNIT_WRITE,
SOC_DTS_OFFSET_PTTSS, sticky_out);
spin_unlock_irqrestore(&sensors->intr_notify_lock, flags);
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
pr_debug("TZD update for zone %d\n", i);
thermal_zone_device_update(sensors->soc_dts[i].tzone);
}
} else
spin_unlock_irqrestore(&sensors->intr_notify_lock, flags);
}
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_interrupt_handler);
struct intel_soc_dts_sensors *intel_soc_dts_iosf_init(
enum intel_soc_dts_interrupt_type intr_type, int trip_count,
int read_only_trip_count)
{
struct intel_soc_dts_sensors *sensors;
bool notification;
u32 tj_max;
int ret;
int i;
if (!iosf_mbi_available())
return ERR_PTR(-ENODEV);
if (!trip_count || read_only_trip_count > trip_count)
return ERR_PTR(-EINVAL);
if (get_tj_max(&tj_max))
return ERR_PTR(-EINVAL);
sensors = kzalloc(sizeof(*sensors), GFP_KERNEL);
if (!sensors)
return ERR_PTR(-ENOMEM);
spin_lock_init(&sensors->intr_notify_lock);
mutex_init(&sensors->dts_update_lock);
sensors->intr_type = intr_type;
sensors->tj_max = tj_max;
if (intr_type == INTEL_SOC_DTS_INTERRUPT_NONE)
notification = false;
else
notification = true;
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
sensors->soc_dts[i].sensors = sensors;
ret = add_dts_thermal_zone(i, &sensors->soc_dts[i],
notification, trip_count,
read_only_trip_count);
if (ret)
goto err_free;
}
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
ret = update_trip_temp(&sensors->soc_dts[i], 0, 0,
THERMAL_TRIP_PASSIVE);
if (ret)
goto err_remove_zone;
ret = update_trip_temp(&sensors->soc_dts[i], 1, 0,
THERMAL_TRIP_PASSIVE);
if (ret)
goto err_remove_zone;
}
return sensors;
err_remove_zone:
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i)
remove_dts_thermal_zone(&sensors->soc_dts[i]);
err_free:
kfree(sensors);
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_init);
void intel_soc_dts_iosf_exit(struct intel_soc_dts_sensors *sensors)
{
int i;
for (i = 0; i < SOC_MAX_DTS_SENSORS; ++i) {
update_trip_temp(&sensors->soc_dts[i], 0, 0, 0);
update_trip_temp(&sensors->soc_dts[i], 1, 0, 0);
remove_dts_thermal_zone(&sensors->soc_dts[i]);
}
kfree(sensors);
}
EXPORT_SYMBOL_GPL(intel_soc_dts_iosf_exit);
MODULE_LICENSE("GPL v2");
View Git Blame Copy Permalink