return size;
}
+/**
+ * DOC: smartshift_apu_power
+ *
+ * The amdgpu driver provides a sysfs API for reporting APU power
+ * share if it supports smartshift. The value is expressed as
+ * the proportion of stapm limit where stapm limit is the total APU
+ * power limit. The result is in percentage. If APU power is 130% of
+ * STAPM, then APU is using 30% of the dGPU's headroom.
+ */
+
+static ssize_t amdgpu_get_smartshift_apu_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);
+ uint32_t ss_power, size;
+ int r = 0;
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ r = pm_runtime_get_sync(ddev->dev);
+ if (r < 0) {
+ pm_runtime_put_autosuspend(ddev->dev);
+ return r;
+ }
+
+ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_SS_APU_SHARE,
+ (void *)&ss_power, &size);
+ if (r)
+ goto out;
+
+ r = sysfs_emit(buf, "%u%%\n", ss_power);
+
+out:
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
+ return r;
+}
+
+/**
+ * DOC: smartshift_dgpu_power
+ *
+ * The amdgpu driver provides a sysfs API for reporting the dGPU power
+ * share if the device is in HG and supports smartshift. The value
+ * is expressed as the proportion of stapm limit where stapm limit
+ * is the total APU power limit. The value is in percentage. If dGPU
+ * power is 20% higher than STAPM power(120%), it's using 20% of the
+ * APU's power headroom.
+ */
+
+static ssize_t amdgpu_get_smartshift_dgpu_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);
+ uint32_t ss_power, size;
+ int r = 0;
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ r = pm_runtime_get_sync(ddev->dev);
+ if (r < 0) {
+ pm_runtime_put_autosuspend(ddev->dev);
+ return r;
+ }
+
+ r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_SS_DGPU_SHARE,
+ (void *)&ss_power, &size);
+
+ if (r)
+ goto out;
+
+ r = sysfs_emit(buf, "%u%%\n", ss_power);
+
+out:
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
+ return r;
+}
+
+static int ss_power_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr,
+ uint32_t mask, enum amdgpu_device_attr_states *states)
+{
+ uint32_t ss_power, size;
+
+ if (!amdgpu_acpi_is_power_shift_control_supported())
+ *states = ATTR_STATE_UNSUPPORTED;
+ else if ((adev->flags & AMD_IS_PX) &&
+ !amdgpu_device_supports_smart_shift(adev_to_drm(adev)))
+ *states = ATTR_STATE_UNSUPPORTED;
+ else if (amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_SS_APU_SHARE,
+ (void *)&ss_power, &size))
+ *states = ATTR_STATE_UNSUPPORTED;
+ else if (amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_SS_DGPU_SHARE,
+ (void *)&ss_power, &size))
+ *states = ATTR_STATE_UNSUPPORTED;
+
+ return 0;
+}
+
static struct amdgpu_device_attr amdgpu_device_attrs[] = {
AMDGPU_DEVICE_ATTR_RW(power_dpm_state, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
AMDGPU_DEVICE_ATTR_RW(power_dpm_force_performance_level, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
AMDGPU_DEVICE_ATTR_RO(unique_id, ATTR_FLAG_BASIC),
AMDGPU_DEVICE_ATTR_RW(thermal_throttling_logging, ATTR_FLAG_BASIC),
AMDGPU_DEVICE_ATTR_RO(gpu_metrics, ATTR_FLAG_BASIC),
+ AMDGPU_DEVICE_ATTR_RO(smartshift_apu_power, ATTR_FLAG_BASIC,
+ .attr_update = ss_power_attr_update),
+ AMDGPU_DEVICE_ATTR_RO(smartshift_dgpu_power, ATTR_FLAG_BASIC,
+ .attr_update = ss_power_attr_update),
};
static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr,