| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _ASM_X86_DMA_MAPPING_H |
| #define _ASM_X86_DMA_MAPPING_H |
| |
| /* |
| * IOMMU interface. See Documentation/DMA-API-HOWTO.txt and |
| * Documentation/DMA-API.txt for documentation. |
| */ |
| |
| #include <linux/scatterlist.h> |
| #include <linux/dma-debug.h> |
| #include <asm/io.h> |
| #include <asm/swiotlb.h> |
| #include <linux/dma-contiguous.h> |
| |
| #ifdef CONFIG_ISA |
| # define ISA_DMA_BIT_MASK DMA_BIT_MASK(24) |
| #else |
| # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32) |
| #endif |
| |
| extern int iommu_merge; |
| extern struct device x86_dma_fallback_dev; |
| extern int panic_on_overflow; |
| |
| extern const struct dma_map_ops *dma_ops; |
| |
| static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) |
| { |
| return dma_ops; |
| } |
| |
| int arch_dma_supported(struct device *dev, u64 mask); |
| #define arch_dma_supported arch_dma_supported |
| |
| bool arch_dma_alloc_attrs(struct device **dev, gfp_t *gfp); |
| #define arch_dma_alloc_attrs arch_dma_alloc_attrs |
| |
| #endif |
