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| author |   Christoph Hellwig <hch@lst.de> | 2020-09-08 17:56:22 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-11 09:14:25 +0200 |
| commit | 7bc5c428a660d4d1bc95ba54bf4cb6bccf8c3029 (patch) | |
| tree | 306eb3d7befdec2da08f45e88e2dd2aaf6e5a5a1 /include/linux/dma-direct.h | |
| parent | dma-direct: use phys_to_dma_direct in dma_direct_alloc (diff) | |
| download | linux-dev-7bc5c428a660d4d1bc95ba54bf4cb6bccf8c3029.tar.xz linux-dev-7bc5c428a660d4d1bc95ba54bf4cb6bccf8c3029.zip | |
dma-direct: remove __dma_to_phys
There is no harm in just always clearing the SME encryption bit, while
significantly simplifying the interface.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'include/linux/dma-direct.h')
| -rw-r--r-- | include/linux/dma-direct.h | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h index 20eceb2e4f91..f00e262ab6b1 100644 --- a/include/linux/dma-direct.h +++ b/include/linux/dma-direct.h @@ -24,11 +24,12 @@ static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr) return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); } -static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr) +static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr) { - phys_addr_t paddr = (phys_addr_t)dev_addr; + phys_addr_t paddr = (phys_addr_t)dev_addr + + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); - return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT); + return __sme_clr(paddr); } #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */ @@ -44,7 +45,7 @@ static inline bool force_dma_unencrypted(struct device *dev) /* * If memory encryption is supported, phys_to_dma will set the memory encryption * bit in the DMA address, and dma_to_phys will clear it. The raw __phys_to_dma - * and __dma_to_phys versions should only be used on non-encrypted memory for + * version should only be used on non-encrypted memory for * special occasions like DMA coherent buffers. */ static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) @@ -52,11 +53,6 @@ static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr) return __sme_set(__phys_to_dma(dev, paddr)); } -static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr) -{ - return __sme_clr(__dma_to_phys(dev, daddr)); -} - static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size, bool is_ram) { |