/** * ttm_bo_validate * * @bo: The buffer object. * @placement: Proposed placement for the buffer object. * @interruptible: Sleep interruptible if sleeping. * @no_wait_gpu: Return immediately if the GPU is busy. * * Changes placement and caching policy of the buffer object * according proposed placement. * Returns * -EINVAL on invalid proposed placement. * -ENOMEM on out-of-memory condition. * -EBUSY if no_wait is true and buffer busy. * -ERESTARTSYS if interrupted by a signal. */