+static phys_addr_t octeon_unity_dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+ return daddr;
+}
+
+struct octeon_dma_map_ops {
+ struct dma_map_ops dma_map_ops;
+ dma_addr_t (*phys_to_dma)(struct device *dev, phys_addr_t paddr);
+ phys_addr_t (*dma_to_phys)(struct device *dev, dma_addr_t daddr);
+};
+
+dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+ struct octeon_dma_map_ops *ops = container_of(get_dma_ops(dev),
+ struct octeon_dma_map_ops,
+ dma_map_ops);
+
+ return ops->phys_to_dma(dev, paddr);
+}
+EXPORT_SYMBOL(phys_to_dma);
+
+phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+ struct octeon_dma_map_ops *ops = container_of(get_dma_ops(dev),
+ struct octeon_dma_map_ops,
+ dma_map_ops);
+
+ return ops->dma_to_phys(dev, daddr);
+}
+EXPORT_SYMBOL(dma_to_phys);
+
+static struct octeon_dma_map_ops octeon_linear_dma_map_ops = {
+ .dma_map_ops = {
+ .alloc_coherent = octeon_dma_alloc_coherent,
+ .free_coherent = octeon_dma_free_coherent,
+ .map_page = octeon_dma_map_page,
+ .unmap_page = swiotlb_unmap_page,
+ .map_sg = octeon_dma_map_sg,
+ .unmap_sg = swiotlb_unmap_sg_attrs,
+ .sync_single_for_cpu = swiotlb_sync_single_for_cpu,
+ .sync_single_for_device = octeon_dma_sync_single_for_device,
+ .sync_sg_for_cpu = swiotlb_sync_sg_for_cpu,
+ .sync_sg_for_device = octeon_dma_sync_sg_for_device,
+ .mapping_error = swiotlb_dma_mapping_error,
+ .dma_supported = swiotlb_dma_supported
+ },
+ .phys_to_dma = octeon_unity_phys_to_dma,
+ .dma_to_phys = octeon_unity_dma_to_phys
+};
+
+char *octeon_swiotlb;
+
+void __init plat_swiotlb_setup(void)
+{
+ int i;
+ phys_t max_addr;
+ phys_t addr_size;
+ size_t swiotlbsize;
+ unsigned long swiotlb_nslabs;
+
+ max_addr = 0;
+ addr_size = 0;
+
+ for (i = 0 ; i < boot_mem_map.nr_map; i++) {
+ struct boot_mem_map_entry *e = &boot_mem_map.map[i];
+ if (e->type != BOOT_MEM_RAM)
+ continue;
+
+ /* These addresses map low for PCI. */
+ if (e->addr > 0x410000000ull)
+ continue;
+
+ addr_size += e->size;
+
+ if (max_addr < e->addr + e->size)
+ max_addr = e->addr + e->size;
+
+ }
+
+ swiotlbsize = PAGE_SIZE;
+
+#ifdef CONFIG_PCI