diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-02-13 08:01:26 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-02-18 22:41:04 +1100 |
| commit | 65a21b71f948406201e4f62e41f06513350ca390 (patch) | |
| tree | b559dae23054117e7ee81ab1c11644b61960ccdb | |
| parent | 5a47910d76f26e5fe6e9837872efdf8282ea76fb (diff) | |
powerpc/dma: remove dma_nommu_dma_supported
This function is largely identical to the generic version used
everywhere else. Replace it with the generic version.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/dma-iommu.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/dma.c | 25 |
3 files changed, 2 insertions, 26 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h index af9a32d4fcf8..cdf70aaeafeb 100644 --- a/arch/powerpc/include/asm/dma-mapping.h +++ b/arch/powerpc/include/asm/dma-mapping.h @@ -31,7 +31,6 @@ int dma_nommu_map_sg(struct device *dev, struct scatterlist *sgl, dma_addr_t dma_nommu_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir, unsigned long attrs); -int dma_nommu_dma_supported(struct device *dev, u64 mask); #ifdef CONFIG_NOT_COHERENT_CACHE /* diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 4377b69a9d42..67fbfaa4e3b2 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -21,7 +21,7 @@ static inline bool dma_iommu_alloc_bypass(struct device *dev) { return dev->archdata.iommu_bypass && !iommu_fixed_is_weak && - dma_nommu_dma_supported(dev, dev->coherent_dma_mask); + dma_direct_supported(dev, dev->coherent_dma_mask); } static inline bool dma_iommu_map_bypass(struct device *dev, diff --git a/arch/powerpc/kernel/dma.c b/arch/powerpc/kernel/dma.c index 46afc66cc271..a3546a82f6d7 100644 --- a/arch/powerpc/kernel/dma.c +++ b/arch/powerpc/kernel/dma.c @@ -39,29 +39,6 @@ static u64 __maybe_unused get_pfn_limit(struct device *dev) return pfn; } -int dma_nommu_dma_supported(struct device *dev, u64 mask) -{ -#ifdef CONFIG_PPC64 - u64 limit = phys_to_dma(dev, (memblock_end_of_DRAM() - 1)); - - /* Limit fits in the mask, we are good */ - if (mask >= limit) - return 1; - -#ifdef CONFIG_FSL_SOC - /* - * Freescale gets another chance via ZONE_DMA, however - * that will have to be refined if/when they support iommus - */ - return 1; -#endif - /* Sorry ... */ - return 0; -#else - return 1; -#endif -} - #ifndef CONFIG_NOT_COHERENT_CACHE void *__dma_nommu_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, @@ -190,7 +167,7 @@ const struct dma_map_ops dma_nommu_ops = { .free = __dma_nommu_free_coherent, .map_sg = dma_nommu_map_sg, .unmap_sg = dma_nommu_unmap_sg, - .dma_supported = dma_nommu_dma_supported, + .dma_supported = dma_direct_supported, .map_page = dma_nommu_map_page, .unmap_page = dma_nommu_unmap_page, .get_required_mask = dma_direct_get_required_mask, |