void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova);
void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
dma_addr_t iova);
void *tegra_drm_alloc(struct tegra_drm *tegra, size_t size, dma_addr_t *iova);
void tegra_drm_free(struct tegra_drm *tegra, size_t size, void *virt,
dma_addr_t iova);