projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| ea8c64ac CH |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #ifndef _LINUX_DMA_DIRECT_H | |
| 3 | #define _LINUX_DMA_DIRECT_H 1 | |
| 4 | ||
| 5 | #include <linux/dma-mapping.h> | |
| b12d6627 | 6 | #include <linux/memblock.h> /* for min_low_pfn */ |
| b6e05477 | 7 | #include <linux/mem_encrypt.h> |
| ea8c64ac | 8 | |
| b12d6627 NSJ |
9 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr); |
| 10 | ||
| ea8c64ac CH |
11 | #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA |
| 12 | #include <asm/dma-direct.h> | |
| 13 | #else | |
| b6e05477 | 14 | static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) |
| ea8c64ac CH |
15 | { |
| 16 | dma_addr_t dev_addr = (dma_addr_t)paddr; | |
| 17 | ||
| 18 | return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); | |
| 19 | } | |
| 20 | ||
| b6e05477 | 21 | static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr) |
| ea8c64ac CH |
22 | { |
| 23 | phys_addr_t paddr = (phys_addr_t)dev_addr; | |
| 24 | ||
| 25 | return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); | |
| 26 | } | |
| 27 | ||
| 28 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) | |
| 29 | { | |
| b12d6627 NSJ |
30 | dma_addr_t end = addr + size - 1; |
| 31 | ||
| ea8c64ac CH |
32 | if (!dev->dma_mask) |
| 33 | return false; | |
| 34 | ||
| b12d6627 NSJ |
35 | if (!IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) && |
| 36 | min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn))) | |
| 37 | return false; | |
| 38 | ||
| 39 | return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_mask); | |
| ea8c64ac CH |
40 | } |
| 41 | #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */ | |
| b49efd76 | 42 | |
| 9087c375 TL |
43 | #ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED |
| 44 | bool force_dma_unencrypted(struct device *dev); | |
| 45 | #else | |
| 46 | static inline bool force_dma_unencrypted(struct device *dev) | |
| 47 | { | |
| 48 | return false; | |
| 49 | } | |
| 50 | #endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */ | |
| 51 | ||
| b6e05477 CH |
52 | /* |
| 53 | * If memory encryption is supported, phys_to_dma will set the memory encryption | |
| 54 | * bit in the DMA address, and dma_to_phys will clear it. The raw __phys_to_dma | |
| 55 | * and __dma_to_phys versions should only be used on non-encrypted memory for | |
| 56 | * special occasions like DMA coherent buffers. | |
| 57 | */ | |
| 58 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) | |
| 59 | { | |
| 60 | return __sme_set(__phys_to_dma(dev, paddr)); | |
| 61 | } | |
| 62 | ||
| 63 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) | |
| 64 | { | |
| 65 | return __sme_clr(__dma_to_phys(dev, daddr)); | |
| 66 | } | |
| 67 | ||
| a20bb058 | 68 | u64 dma_direct_get_required_mask(struct device *dev); |
| 19dca8c0 CH |
69 | void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, |
| 70 | gfp_t gfp, unsigned long attrs); | |
| 71 | void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, | |
| 72 | dma_addr_t dma_addr, unsigned long attrs); | |
| bc3ec75d CH |
73 | void *dma_direct_alloc_pages(struct device *dev, size_t size, |
| 74 | dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); | |
| 75 | void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr, | |
| 76 | dma_addr_t dma_addr, unsigned long attrs); | |
| b18814e7 | 77 | struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, |
| 4e1003aa | 78 | gfp_t gfp, unsigned long attrs); |
| 34dc0ea6 CH |
79 | int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt, |
| 80 | void *cpu_addr, dma_addr_t dma_addr, size_t size, | |
| 81 | unsigned long attrs); | |
| 82 | bool dma_direct_can_mmap(struct device *dev); | |
| 83 | int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma, | |
| 84 | void *cpu_addr, dma_addr_t dma_addr, size_t size, | |
| 85 | unsigned long attrs); | |
| 1a9777a8 | 86 | int dma_direct_supported(struct device *dev, u64 mask); |
| ea8c64ac | 87 | #endif /* _LINUX_DMA_DIRECT_H */ |