223 	long npages, dma_ofs, i;  in pci_map_single_1()  local
270 	dma_ofs = iommu_arena_alloc(arena, npages, pdev ? 0 : 8);  in pci_map_single_1()
271 	if (dma_ofs < 0) {  in pci_map_single_1()
279 		arena->ptes[i + dma_ofs] = mk_iommu_pte(paddr);  in pci_map_single_1()
281 	ret = arena->dma_base + dma_ofs * PAGE_SIZE;  in pci_map_single_1()
329 	long dma_ofs, npages;  in pci_unmap_single()  local
354 	dma_ofs = (dma_addr - arena->dma_base) >> PAGE_SHIFT;  in pci_unmap_single()
355 	if (dma_ofs * PAGE_SIZE >= arena->size) {  in pci_unmap_single()
367 	iommu_arena_free(arena, dma_ofs, npages);  in pci_unmap_single()
372 	if (dma_ofs >= arena->next_entry)  in pci_unmap_single()
515 	long npages, dma_ofs, i;  in sg_fill()  local
549 	dma_ofs = iommu_arena_alloc(arena, npages, 0);  in sg_fill()
550 	if (dma_ofs < 0) {  in sg_fill()
561 	out->dma_address = arena->dma_base + dma_ofs*PAGE_SIZE + paddr;  in sg_fill()
569 	ptes = &arena->ptes[dma_ofs];  in sg_fill()