| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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/DMA-API-HOWTO.txt and |
| 7 | * Documentation/DMA-API.txt 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 | #ifdef CONFIG_ISA |
| 17 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(24) |
| 18 | #else |
| 19 | # define ISA_DMA_BIT_MASK DMA_BIT_MASK(32) |
| 20 | #endif |
| 21 | |
| 22 | extern int iommu_merge; |
| 23 | extern struct device x86_dma_fallback_dev; |
| 24 | extern int panic_on_overflow; |
| 25 | |
| 26 | extern const struct dma_map_ops *dma_ops; |
| 27 | |
| 28 | static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus) |
| 29 | { |
| 30 | return dma_ops; |
| 31 | } |
| 32 | |
| 33 | bool arch_dma_alloc_attrs(struct device **dev); |
| 34 | #define arch_dma_alloc_attrs arch_dma_alloc_attrs |
| 35 | |
| 36 | #endif |