256 	long npages, dma_ofs, i;  in pci_map_single_1()  local
304 	dma_ofs = iommu_arena_alloc(dev, arena, npages, align);  in pci_map_single_1()
305 	if (dma_ofs < 0) {  in pci_map_single_1()
313 		arena->ptes[i + dma_ofs] = mk_iommu_pte(paddr);  in pci_map_single_1()
315 	ret = arena->dma_base + dma_ofs * PAGE_SIZE;  in pci_map_single_1()
378 	long dma_ofs, npages;  in alpha_pci_unmap_page()  local
403 	dma_ofs = (dma_addr - arena->dma_base) >> PAGE_SHIFT;  in alpha_pci_unmap_page()
404 	if (dma_ofs * PAGE_SIZE >= arena->size) {  in alpha_pci_unmap_page()
416 	iommu_arena_free(arena, dma_ofs, npages);  in alpha_pci_unmap_page()
421 	if (dma_ofs >= arena->next_entry)  in alpha_pci_unmap_page()
561 	long npages, dma_ofs, i;  in sg_fill()  local
595 	dma_ofs = iommu_arena_alloc(dev, arena, npages, 0);  in sg_fill()
596 	if (dma_ofs < 0) {  in sg_fill()
607 	out->dma_address = arena->dma_base + dma_ofs*PAGE_SIZE + paddr;  in sg_fill()
615 	ptes = &arena->ptes[dma_ofs];  in sg_fill()