/* DMA operations on that device */
struct dma_map_ops *dma_ops;
- void *dma_data;
+
+ /*
+ * When an iommu is in use, dma_data is used as a ptr to the base of the
+ * iommu_table. Otherwise, it is a simple numerical offset.
+ */
+ union {
+ dma_addr_t dma_offset;
+ void *iommu_table_base;
+ } dma_data;
+
#ifdef CONFIG_SWIOTLB
dma_addr_t max_direct_dma_addr;
#endif