| /* 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; | |
| } | |
| bool arch_dma_alloc_attrs(struct device **dev); | |
| #define arch_dma_alloc_attrs arch_dma_alloc_attrs | |
| #endif |