参照元†
- struct device *dev
- struct page *page
- unsigned long offset
- size_t size
- enum dma_data_direction dir
- struct dma_attrs *attrs
返り値†
static dma_addr_t __iommu_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size,
enum dma_data_direction dir,
struct dma_attrs *attrs)
{
bool coherent = is_device_dma_coherent(dev);
int prot = dma_direction_to_prot(dir, coherent);
dma_addr_t dev_addr = iommu_dma_map_page(dev, page, offset, size, prot);
if (!iommu_dma_mapping_error(dev, dev_addr) &&
!dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
__iommu_sync_single_for_device(dev, dev_addr, size, dir);
return dev_addr;
}
コメント†
![[PukiWiki]](image/pukiwiki.png "[PukiWiki]")
