Commit 25e82f2e authored by Asad Kamal's avatar Asad Kamal Committed by Alex Deucher
Browse files

drm/amd/pm: Add temperature metrics sysfs entry 



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: default avatarAsad Kamal <asad.kamal@amd.com>
Reviewed-by: default avatarLijo Lazar <lijo.lazar@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 33074558

drivers/gpu/drm/amd/pm/amdgpu_pm.c

+135 −0
Original line number Diff line number Diff line
@@ -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;