Add temperature metrics sysfs entry to expose gpuboard/baseboard
temperature metrics
v2: Removed unused function, rename functions(Lijo)
Signed-off-by: Asad Kamal <asad.ka...@amd.com>
---
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 135 +++++++++++++++++++++++++++++
1 file changed, 135 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index 8d934a365c3b..75b06ca7f20a 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -2080,6 +2080,134 @@ 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 bard 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 tempertature 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 = 0;
+ 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 tempertature 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 = 0;
+ 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;
@@ -4468,6 +4596,13 @@ 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;
--
2.46.0
