270 	long npages, dma_ofs, i;  in pci_map_single_1()  local
318 	dma_ofs = iommu_arena_alloc(dev, arena, npages, align);  in pci_map_single_1()
319 	if (dma_ofs < 0) {  in pci_map_single_1()
327 		arena->ptes[i + dma_ofs] = mk_iommu_pte(paddr);  in pci_map_single_1()
329 	ret = arena->dma_base + dma_ofs * PAGE_SIZE;  in pci_map_single_1()
391 	long dma_ofs, npages;  in alpha_pci_unmap_page()  local
415 	dma_ofs = (dma_addr - arena->dma_base) >> PAGE_SHIFT;  in alpha_pci_unmap_page()
416 	if (dma_ofs * PAGE_SIZE >= arena->size) {  in alpha_pci_unmap_page()
428 	iommu_arena_free(arena, dma_ofs, npages);  in alpha_pci_unmap_page()
433 	if (dma_ofs >= arena->next_entry)  in alpha_pci_unmap_page()
575 	long npages, dma_ofs, i;  in sg_fill()  local
609 	dma_ofs = iommu_arena_alloc(dev, arena, npages, 0);  in sg_fill()
610 	if (dma_ofs < 0) {  in sg_fill()
621 	out->dma_address = arena->dma_base + dma_ofs*PAGE_SIZE + paddr;  in sg_fill()
629 	ptes = &arena->ptes[dma_ofs];  in sg_fill()