C++ (Cpp) acpi_get_dma_attr示例

示例#1

文件： property.c 项目： CXsoft/linux

enum dev_dma_attr device_get_dma_attr(struct device *dev)
{
	enum dev_dma_attr attr = DEV_DMA_NOT_SUPPORTED;

	if (IS_ENABLED(CONFIG_OF) && dev->of_node) {
		if (of_dma_is_coherent(dev->of_node))
			attr = DEV_DMA_COHERENT;
		else
			attr = DEV_DMA_NON_COHERENT;
	} else
		attr = acpi_get_dma_attr(ACPI_COMPANION(dev));

	return attr;
}

示例#2

文件： platform.c 项目： avagin/linux

int platform_dma_configure(struct device *dev)
{
	enum dev_dma_attr attr;
	int ret = 0;

	if (dev->of_node) {
		ret = of_dma_configure(dev, dev->of_node, true);
	} else if (has_acpi_companion(dev)) {
		attr = acpi_get_dma_attr(to_acpi_device_node(dev->fwnode));
		ret = acpi_dma_configure(dev, attr);
	}

	return ret;
}