1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_DMA_MAPPING_H 3 #define _ASM_X86_DMA_MAPPING_H 4 5 /* 6 * IOMMU interface. See Documentation/core-api/dma-api-howto.rst and 7 * Documentation/core-api/dma-api.rst for documentation. 8 */ 9 10 #include <linux/scatterlist.h> 11 #include <linux/dma-debug.h> 12 #include <asm/io.h> 13 #include <asm/swiotlb.h> 14 #include <linux/dma-contiguous.h> 15 16 extern int iommu_merge; 17 extern int panic_on_overflow; 18 19 extern const struct dma_map_ops *dma_ops; 20 21 static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) 22 { 23 return dma_ops; 24 } 25 26 #endif 27