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drm/amd/pm: Add sysfs node for ubb power

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Add sysfs node to expose ubb power limit for smu_v13_0_12

v2: Update sysfs node name to baseboard_power & baseboard_power_limit to
make it consistent with other node names (Lijo)

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 2025-10-29 21:49:59 +08:00 committed by Alex Deucher
parent e8f4ea34b6
commit 209529414e
2 changed files with 65 additions and 2 deletions
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2
drivers/gpu/drm/amd/include/kgd_pp_interface.h
View File

@ -166,6 +166,8 @@ enum amd_pp_sensors {
AMDGPU_PP_SENSOR_NODEPOWER,
AMDGPU_PP_SENSOR_GPPTRESIDENCY,
AMDGPU_PP_SENSOR_MAXNODEPOWERLIMIT,
AMDGPU_PP_SENSOR_UBB_POWER,
AMDGPU_PP_SENSOR_UBB_POWER_LIMIT,
};
enum amd_pp_task {

65
drivers/gpu/drm/amd/pm/amdgpu_pm.c
View File

@ -2081,9 +2081,10 @@ static int pp_dpm_clk_default_attr_update(struct amdgpu_device *adev, struct amd
* for user application to monitor various board reated attributes.
*
* The amdgpu driver provides a sysfs API for reporting board attributes. Presently,
* seven types of attributes are reported. Baseboard temperature and
* nine types of attributes are reported. Baseboard temperature and
* gpu board temperature are reported as binary files. Npm status, current node power limit,
* max node power limit, node power and global ppt residency is reported as ASCII text file.
* max node power limit, node power, global ppt residency, baseboard_power, baseboard_power_limit
* is reported as ASCII text file.
*
* * .. code-block:: console
*
@ -2100,6 +2101,10 @@ static int pp_dpm_clk_default_attr_update(struct amdgpu_device *adev, struct amd
* hexdump /sys/bus/pci/devices/.../board/node_power
*
* hexdump /sys/bus/pci/devices/.../board/global_ppt_resid
*
* hexdump /sys/bus/pci/devices/.../board/baseboard_power
*
* hexdump /sys/bus/pci/devices/.../board/baseboard_power_limit
*/
/**
@ -2294,6 +2299,52 @@ static ssize_t amdgpu_show_max_node_power_limit(struct device *dev,
return sysfs_emit(buf, "%u\n", max_nplimit);
}
/**
* DOC: baseboard_power
*
* The amdgpu driver provides a sysfs API for retrieving current ubb power in watts.
* The file baseboard_power is used for this.
*/
static ssize_t amdgpu_show_baseboard_power(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);
u32 ubbpower;
int r;
/* get the ubb power */
r = amdgpu_pm_get_sensor_generic(adev, AMDGPU_PP_SENSOR_UBB_POWER,
(void *)&ubbpower);
if (r)
return r;
return sysfs_emit(buf, "%u\n", ubbpower);
}
/**
* DOC: baseboard_power_limit
*
* The amdgpu driver provides a sysfs API for retrieving threshold ubb power in watts.
* The file baseboard_power_limit is used for this.
*/
static ssize_t amdgpu_show_baseboard_power_limit(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);
u32 ubbpowerlimit;
int r;
/* get the ubb power limit */
r = amdgpu_pm_get_sensor_generic(adev, AMDGPU_PP_SENSOR_UBB_POWER_LIMIT,
(void *)&ubbpowerlimit);
if (r)
return r;
return sysfs_emit(buf, "%u\n", ubbpowerlimit);
}
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 DEVICE_ATTR(cur_node_power_limit, 0444, amdgpu_show_cur_node_power_limit, NULL);
@ -2301,6 +2352,8 @@ static DEVICE_ATTR(node_power, 0444, amdgpu_show_node_power, NULL);
static DEVICE_ATTR(global_ppt_resid, 0444, amdgpu_show_global_ppt_resid, NULL);
static DEVICE_ATTR(max_node_power_limit, 0444, amdgpu_show_max_node_power_limit, NULL);
static DEVICE_ATTR(npm_status, 0444, amdgpu_show_npm_status, NULL);
static DEVICE_ATTR(baseboard_power, 0444, amdgpu_show_baseboard_power, NULL);
static DEVICE_ATTR(baseboard_power_limit, 0444, amdgpu_show_baseboard_power_limit, NULL);
static struct attribute *board_attrs[] = {
&dev_attr_baseboard_temp.attr,
@ -4756,6 +4809,14 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
sysfs_add_file_to_group(&adev->dev->kobj, &dev_attr_npm_status.attr,
amdgpu_board_attr_group.name);
}
if (amdgpu_pm_get_sensor_generic(adev, AMDGPU_PP_SENSOR_UBB_POWER_LIMIT,
(void *)&tmp) != -EOPNOTSUPP) {
sysfs_add_file_to_group(&adev->dev->kobj,
&dev_attr_baseboard_power_limit.attr,
amdgpu_board_attr_group.name);
sysfs_add_file_to_group(&adev->dev->kobj, &dev_attr_baseboard_power.attr,
amdgpu_board_attr_group.name);
}
}
adev->pm.sysfs_initialized = true;