diff --git a/arch/mips/include/asm/mach-generic/dma-coherence.h b/arch/mips/include/asm/mach-generic/dma-coherence.h
index fe23034aaf721497af158ee2deec840038478dcf..74cb99257d5b9b25dda5aec6fa1eaa1553612086 100644
--- a/arch/mips/include/asm/mach-generic/dma-coherence.h
+++ b/arch/mips/include/asm/mach-generic/dma-coherence.h
@@ -66,4 +66,16 @@ static inline int plat_device_is_coherent(struct device *dev)
 #endif
 }
 
+#ifdef CONFIG_SWIOTLB
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
+{
+	return paddr;
+}
+
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
+{
+	return daddr;
+}
+#endif
+
 #endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
diff --git a/arch/mips/mm/dma-default.c b/arch/mips/mm/dma-default.c
index caf92ecb37d6966639c47e6eb277d74cb42f2012..aaccf1c106997aecc8fa7050a4bfa8072212dab0 100644
--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -246,6 +246,9 @@ static int mips_dma_map_sg(struct device *dev, struct scatterlist *sg,
 		if (!plat_device_is_coherent(dev))
 			__dma_sync(sg_page(sg), sg->offset, sg->length,
 				   direction);
+#ifdef CONFIG_NEED_SG_DMA_LENGTH
+		sg->dma_length = sg->length;
+#endif
 		sg->dma_address = plat_map_dma_mem_page(dev, sg_page(sg)) +
 				  sg->offset;
 	}