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drm/xe/hwmon: expose package and vram temperature

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Add hwmon support for temp2_input and temp3_input attributes, which will
expose package and vram temperature in millidegree Celsius. With this in
place we can monitor temperature using lm-sensors tool.

v2: Reuse existing channels (Badal, Karthik)

Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250131054502.1528555-1-raag.jadav@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
This commit is contained in:
Raag Jadav 2025-01-31 11:15:02 +05:30 committed by Rodrigo Vivi
parent 9c9dc9ba4a
commit dac328dea7
No known key found for this signature in database
GPG Key ID: FA625F640EEB13CA
4 changed files with 81 additions and 0 deletions
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16
Documentation/ABI/testing/sysfs-driver-intel-xe-hwmon
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@ -108,3 +108,19 @@ Contact: intel-xe@lists.freedesktop.org
Description: RO. Package current voltage in millivolt.
Only supported for particular Intel Xe graphics platforms.
What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/temp2_input
Date: March 2025
KernelVersion: 6.14
Contact: intel-xe@lists.freedesktop.org
Description: RO. Package temperature in millidegree Celsius.
Only supported for particular Intel Xe graphics platforms.
What: /sys/bus/pci/drivers/xe/.../hwmon/hwmon<i>/temp3_input
Date: March 2025
KernelVersion: 6.14
Contact: intel-xe@lists.freedesktop.org
Description: RO. VRAM temperature in millidegree Celsius.
Only supported for particular Intel Xe graphics platforms.

3
drivers/gpu/drm/xe/regs/xe_mchbar_regs.h
View File

@ -34,6 +34,9 @@
#define PCU_CR_PACKAGE_ENERGY_STATUS XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x593c)
#define PCU_CR_PACKAGE_TEMPERATURE XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x5978)
#define TEMP_MASK REG_GENMASK(7, 0)
#define PCU_CR_PACKAGE_RAPL_LIMIT XE_REG(MCHBAR_MIRROR_BASE_SNB + 0x59a0)
#define PKG_PWR_LIM_1 REG_GENMASK(14, 0)
#define PKG_PWR_LIM_1_EN REG_BIT(15)

2
drivers/gpu/drm/xe/regs/xe_pcode_regs.h
View File

@ -21,6 +21,8 @@
#define BMG_PACKAGE_POWER_SKU XE_REG(0x138098)
#define BMG_PACKAGE_POWER_SKU_UNIT XE_REG(0x1380dc)
#define BMG_PACKAGE_ENERGY_STATUS XE_REG(0x138120)
#define BMG_VRAM_TEMPERATURE XE_REG(0x1382c0)
#define BMG_PACKAGE_TEMPERATURE XE_REG(0x138434)
#define BMG_PACKAGE_RAPL_LIMIT XE_REG(0x138440)
#define BMG_PLATFORM_ENERGY_STATUS XE_REG(0x138458)
#define BMG_PLATFORM_POWER_LIMIT XE_REG(0x138460)

60
drivers/gpu/drm/xe/xe_hwmon.c
View File

@ -6,6 +6,7 @@
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon.h>
#include <linux/types.h>
#include <linux/units.h>
#include <drm/drm_managed.h>
#include "regs/xe_gt_regs.h"
@ -20,6 +21,7 @@
#include "xe_pm.h"
enum xe_hwmon_reg {
REG_TEMP,
REG_PKG_RAPL_LIMIT,
REG_PKG_POWER_SKU,
REG_PKG_POWER_SKU_UNIT,
@ -36,6 +38,7 @@ enum xe_hwmon_reg_operation {
enum xe_hwmon_channel {
CHANNEL_CARD,
CHANNEL_PKG,
CHANNEL_VRAM,
CHANNEL_MAX,
};
@ -84,6 +87,19 @@ static struct xe_reg xe_hwmon_get_reg(struct xe_hwmon *hwmon, enum xe_hwmon_reg
struct xe_device *xe = hwmon->xe;
switch (hwmon_reg) {
case REG_TEMP:
if (xe->info.platform == XE_BATTLEMAGE) {
if (channel == CHANNEL_PKG)
return BMG_PACKAGE_TEMPERATURE;
else if (channel == CHANNEL_VRAM)
return BMG_VRAM_TEMPERATURE;
} else if (xe->info.platform == XE_DG2) {
if (channel == CHANNEL_PKG)
return PCU_CR_PACKAGE_TEMPERATURE;
else if (channel == CHANNEL_VRAM)
return BMG_VRAM_TEMPERATURE;
}
break;
case REG_PKG_RAPL_LIMIT:
if (xe->info.platform == XE_BATTLEMAGE) {
if (channel == CHANNEL_PKG)
@ -431,6 +447,8 @@ static const struct attribute_group *hwmon_groups[] = {
};
static const struct hwmon_channel_info * const hwmon_info[] = {
HWMON_CHANNEL_INFO(temp, HWMON_T_LABEL, HWMON_T_INPUT | HWMON_T_LABEL,
HWMON_T_INPUT | HWMON_T_LABEL),
HWMON_CHANNEL_INFO(power, HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_LABEL,
HWMON_P_MAX | HWMON_P_RATED_MAX | HWMON_P_CRIT | HWMON_P_LABEL),
HWMON_CHANNEL_INFO(curr, HWMON_C_LABEL, HWMON_C_CRIT | HWMON_C_LABEL),
@ -506,6 +524,36 @@ static void xe_hwmon_get_voltage(struct xe_hwmon *hwmon, int channel, long *valu
*value = DIV_ROUND_CLOSEST(REG_FIELD_GET(VOLTAGE_MASK, reg_val) * 2500, SF_VOLTAGE);
}
static umode_t
xe_hwmon_temp_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel)
{
switch (attr) {
case hwmon_temp_input:
case hwmon_temp_label:
return xe_reg_is_valid(xe_hwmon_get_reg(hwmon, REG_TEMP, channel)) ? 0444 : 0;
default:
return 0;
}
}
static int
xe_hwmon_temp_read(struct xe_hwmon *hwmon, u32 attr, int channel, long *val)
{
struct xe_mmio *mmio = xe_root_tile_mmio(hwmon->xe);
u64 reg_val;
switch (attr) {
case hwmon_temp_input:
reg_val = xe_mmio_read32(mmio, xe_hwmon_get_reg(hwmon, REG_TEMP, channel));
/* HW register value is in degrees Celsius, convert to millidegrees. */
*val = REG_FIELD_GET(TEMP_MASK, reg_val) * MILLIDEGREE_PER_DEGREE;
return 0;
default:
return -EOPNOTSUPP;
}
}
static umode_t
xe_hwmon_power_is_visible(struct xe_hwmon *hwmon, u32 attr, int channel)
{
@ -667,6 +715,9 @@ xe_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type,
xe_pm_runtime_get(hwmon->xe);
switch (type) {
case hwmon_temp:
ret = xe_hwmon_temp_is_visible(hwmon, attr, channel);
break;
case hwmon_power:
ret = xe_hwmon_power_is_visible(hwmon, attr, channel);
break;
@ -699,6 +750,9 @@ xe_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
xe_pm_runtime_get(hwmon->xe);
switch (type) {
case hwmon_temp:
ret = xe_hwmon_temp_read(hwmon, attr, channel, val);
break;
case hwmon_power:
ret = xe_hwmon_power_read(hwmon, attr, channel, val);
break;
@ -752,6 +806,12 @@ static int xe_hwmon_read_label(struct device *dev,
u32 attr, int channel, const char **str)
{
switch (type) {
case hwmon_temp:
if (channel == CHANNEL_PKG)
*str = "pkg";
else if (channel == CHANNEL_VRAM)
*str = "vram";
return 0;
case hwmon_power:
case hwmon_energy:
case hwmon_curr: