1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_DMA_MAPPING_H 3 #define _ASM_DMA_MAPPING_H 4 5 #include <linux/scatterlist.h> 6 #include <asm/dma-coherence.h> 7 #include <asm/cache.h> 8 9 #ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */ 10 #include <dma-coherence.h> 11 #endif 12 13 extern const struct dma_map_ops jazz_dma_ops; 14 extern const struct dma_map_ops mips_default_dma_map_ops; 15 extern const struct dma_map_ops mips_swiotlb_ops; 16 17 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) 18 { 19 #if defined(CONFIG_MACH_JAZZ) 20 return &jazz_dma_ops; 21 #elif defined(CONFIG_SWIOTLB) 22 return &mips_swiotlb_ops; 23 #elif defined(CONFIG_MIPS_DMA_DEFAULT) 24 return &mips_default_dma_map_ops; 25 #elif defined(CONFIG_DMA_NONCOHERENT_OPS) 26 return &dma_noncoherent_ops; 27 #else 28 return &dma_direct_ops; 29 #endif 30 } 31 32 #define arch_setup_dma_ops arch_setup_dma_ops 33 static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base, 34 u64 size, const struct iommu_ops *iommu, 35 bool coherent) 36 { 37 #ifdef CONFIG_DMA_PERDEV_COHERENT 38 dev->archdata.dma_coherent = coherent; 39 #endif 40 } 41 42 #endif /* _ASM_DMA_MAPPING_H */ 43