alpha/kernel/pci_iommu.c

266 	   assume it doesn't support sg mapping, and, since we tried to
269 		printk_once(KERN_WARNING "pci_map_single: no HW sg\n");
296 	DBGA2("pci_map_single: [%p,%zx] np %ld -> sg %llx from %ps\n",
402 	DBGA2("pci_unmap_single: sg [%llx,%zx] np %ld from %ps\n",
428 		   with vmalloc and sg if we can't find contiguous memory.  */
481 sg_classify(struct device *dev, struct scatterlist *sg, struct scatterlist *end,
489 	leader = sg;
494 	/* we will not marge sg without device. */
496 	for (++sg; sg < end; ++sg) {
498 		addr = SG_ENT_PHYS_ADDRESS(sg);
499 		len = sg->length;
505 			sg->dma_address = -1;
508 			sg->dma_address = -2;
515 			leader = sg;
537 	struct scatterlist *sg;
588 	DBGA("    sg_fill: [%p,%lx] -> sg %llx np %ld\n",
594 	sg = leader;
597 		struct scatterlist *last_sg = sg;
600 		size = sg->length;
601 		paddr = SG_ENT_PHYS_ADDRESS(sg);
603 		while (sg+1 < end && (int) sg[1].dma_address == -1) {
604 			size += sg[1].length;
605 			sg = sg_next(sg);
618 		while (++last_sg <= sg) {
624 	} while (++sg < end && (int) sg->dma_address < 0);
629 static int alpha_pci_map_sg(struct device *dev, struct scatterlist *sg,
646 		sg->dma_length = sg->length;
647 		sg->dma_address
648 		  = pci_map_single_1(pdev, SG_ENT_VIRT_ADDRESS(sg),
649 				     sg->length, dac_allowed);
650 		if (sg->dma_address == DMA_MAPPING_ERROR)
655 	start = sg;
656 	end = sg + nents;
659 	sg_classify(dev, sg, end, alpha_mv.mv_pci_tbi != 0);
676 	for (out = sg; sg < end; ++sg) {
677 		if ((int) sg->dma_address < 0)
679 		if (sg_fill(dev, sg, end, out, arena, max_dma, dac_allowed) < 0)
711 static void alpha_pci_unmap_sg(struct device *dev, struct scatterlist *sg,
738 	for (end = sg + nents; sg < end; ++sg) {
744 		addr = sg->dma_address;
745 		size = sg->dma_length;
752 			      sg - end + nents, addr, size);
760 			      sg - end + nents, addr, size);
764 		DBGA("    (%ld) sg [%llx,%zx]\n",
765 		     sg - end + nents, addr, size);
784 	DBGA("pci_unmap_sg: %ld entries\n", nents - (end - sg));