projects / mirror_ubuntu-eoan-kernel.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> | |
| b6e05477 | 6 | #include <linux/mem_encrypt.h> |
| ea8c64ac CH |
7 | |
| 8 | #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA | |
| 9 | #include <asm/dma-direct.h> | |
| 10 | #else | |
| b6e05477 | 11 | static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) |
| ea8c64ac CH |
12 | { |
| 13 | dma_addr_t dev_addr = (dma_addr_t)paddr; | |
| 14 | ||
| 15 | return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); | |
| 16 | } | |
| 17 | ||
| b6e05477 | 18 | static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr) |
| ea8c64ac CH |
19 | { |
| 20 | phys_addr_t paddr = (phys_addr_t)dev_addr; | |
| 21 | ||
| 22 | return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); | |
| 23 | } | |
| 24 | ||
| 25 | static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size) | |
| 26 | { | |
| 27 | if (!dev->dma_mask) | |
| 28 | return false; | |
| 29 | ||
| b4ebe606 CH |
30 | return addr + size - 1 <= |
| 31 | min_not_zero(*dev->dma_mask, dev->bus_dma_mask); | |
| ea8c64ac CH |
32 | } |
| 33 | #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */ | |
| b49efd76 | 34 | |
| b6e05477 CH |
35 | /* |
| 36 | * If memory encryption is supported, phys_to_dma will set the memory encryption | |
| 37 | * bit in the DMA address, and dma_to_phys will clear it. The raw __phys_to_dma | |
| 38 | * and __dma_to_phys versions should only be used on non-encrypted memory for | |
| 39 | * special occasions like DMA coherent buffers. | |
| 40 | */ | |
| 41 | static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) | |
| 42 | { | |
| 43 | return __sme_set(__phys_to_dma(dev, paddr)); | |
| 44 | } | |
| 45 | ||
| 46 | static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) | |
| 47 | { | |
| 48 | return __sme_clr(__dma_to_phys(dev, daddr)); | |
| 49 | } | |
| 50 | ||
| a20bb058 | 51 | u64 dma_direct_get_required_mask(struct device *dev); |
| 19dca8c0 CH |
52 | void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, |
| 53 | gfp_t gfp, unsigned long attrs); | |
| 54 | void dma_direct_free(struct device *dev, size_t size, void *cpu_addr, | |
| 55 | dma_addr_t dma_addr, unsigned long attrs); | |
| bc3ec75d CH |
56 | void *dma_direct_alloc_pages(struct device *dev, size_t size, |
| 57 | dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); | |
| 58 | void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr, | |
| 59 | dma_addr_t dma_addr, unsigned long attrs); | |
| b18814e7 CH |
60 | struct page *__dma_direct_alloc_pages(struct device *dev, size_t size, |
| 61 | dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs); | |
| 62 | void __dma_direct_free_pages(struct device *dev, size_t size, struct page *page); | |
| 1a9777a8 | 63 | int dma_direct_supported(struct device *dev, u64 mask); |
| ea8c64ac | 64 | #endif /* _LINUX_DMA_DIRECT_H */ |