admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

drm/amd/pm: Add temperature metrics sysfs entry

Browse Source 
Add temperature metrics sysfs entry to expose gpuboard/baseboard
temperature metrics

v2: Removed unused function, rename functions(Lijo)

v3: Remove unnecessary initialization

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Asad Kamal
2025-08-02 04:29:06 +08:00
committed by Alex Deucher
parent 33074558ec
commit 25e82f2e2c
1 changed files with 135 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

135
drivers/gpu/drm/amd/pm/amdgpu_pm.c
View File

@@ -2073,6 +2073,134 @@ static int pp_dpm_clk_default_attr_update(struct amdgpu_device *adev, struct amd
return 0;
}
/**
* DOC: board
*
* Certain SOCs can support various board attributes reporting. This is useful
* for user application to monitor various board reated attributes.
*
* The amdgpu driver provides a sysfs API for reporting board attributes. Presently,
* only two types of attributes are reported, baseboard temperature and
* gpu board temperature. Both of them are reported as binary files.
*
* * .. code-block:: console
*
* hexdump /sys/bus/pci/devices/.../board/baseboard_temp
*
* hexdump /sys/bus/pci/devices/.../board/gpuboard_temp
*
*/
/**
* DOC: baseboard_temp
*
* The amdgpu driver provides a sysfs API for retrieving current baseboard
* temperature metrics data. The file baseboard_temp is used for this.
* Reading the file will dump all the current baseboard temperature metrics data.
*/
static ssize_t amdgpu_get_baseboard_temp_metrics(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
ssize_t size;
int ret;
ret = amdgpu_pm_get_access_if_active(adev);
if (ret)
return ret;
size = amdgpu_dpm_get_temp_metrics(adev, SMU_TEMP_METRIC_BASEBOARD, NULL);
if (size <= 0)
goto out;
if (size >= PAGE_SIZE) {
ret = -ENOSPC;
goto out;
}
amdgpu_dpm_get_temp_metrics(adev, SMU_TEMP_METRIC_BASEBOARD, buf);
out:
amdgpu_pm_put_access(adev);
if (ret)
return ret;
return size;
}
/**
* DOC: gpuboard_temp
*
* The amdgpu driver provides a sysfs API for retrieving current gpuboard
* temperature metrics data. The file gpuboard_temp is used for this.
* Reading the file will dump all the current gpuboard temperature metrics data.
*/
static ssize_t amdgpu_get_gpuboard_temp_metrics(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
ssize_t size;
int ret;
ret = amdgpu_pm_get_access_if_active(adev);
if (ret)
return ret;
size = amdgpu_dpm_get_temp_metrics(adev, SMU_TEMP_METRIC_GPUBOARD, NULL);
if (size <= 0)
goto out;
if (size >= PAGE_SIZE) {
ret = -ENOSPC;
goto out;
}
amdgpu_dpm_get_temp_metrics(adev, SMU_TEMP_METRIC_GPUBOARD, buf);
out:
amdgpu_pm_put_access(adev);
if (ret)
return ret;
return size;
}
static DEVICE_ATTR(baseboard_temp, 0444, amdgpu_get_baseboard_temp_metrics, NULL);
static DEVICE_ATTR(gpuboard_temp, 0444, amdgpu_get_gpuboard_temp_metrics, NULL);
static struct attribute *board_attrs[] = {
&dev_attr_baseboard_temp.attr,
&dev_attr_gpuboard_temp.attr,
NULL
};
static umode_t amdgpu_board_attr_visible(struct kobject *kobj, struct attribute *attr, int n)
{
struct device *dev = kobj_to_dev(kobj);
struct drm_device *ddev = dev_get_drvdata(dev);
struct amdgpu_device *adev = drm_to_adev(ddev);
if (attr == &dev_attr_baseboard_temp.attr) {
if (!amdgpu_dpm_is_temp_metrics_supported(adev, SMU_TEMP_METRIC_BASEBOARD))
return 0;
}
if (attr == &dev_attr_gpuboard_temp.attr) {
if (!amdgpu_dpm_is_temp_metrics_supported(adev, SMU_TEMP_METRIC_GPUBOARD))
return 0;
}
return attr->mode;
}
const struct attribute_group amdgpu_board_attr_group = {
.name = "board",
.attrs = board_attrs,
.is_visible = amdgpu_board_attr_visible,
};
/* pm policy attributes */
struct amdgpu_pm_policy_attr {
struct device_attribute dev_attr;
@@ -4461,6 +4589,13 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
goto err_out0;
}
if (amdgpu_dpm_is_temp_metrics_supported(adev, SMU_TEMP_METRIC_GPUBOARD)) {
ret = devm_device_add_group(adev->dev,
&amdgpu_board_attr_group);
if (ret)
goto err_out0;
}
adev->pm.sysfs_initialized = true;
return 0;