diff options
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/Kconfig | 3 | ||||
| -rw-r--r-- | kernel/dma/direct.c | 3 | ||||
| -rw-r--r-- | kernel/dma/mapping.c | 11 | ||||
| -rw-r--r-- | kernel/dma/swiotlb.c | 12 |
4 files changed, 11 insertions, 18 deletions
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index ca88b867e7fe..0711d18645de 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -16,6 +16,9 @@ config ARCH_DMA_ADDR_T_64BIT config ARCH_HAS_DMA_COHERENCE_H bool +config ARCH_HAS_DMA_SET_MASK + bool + config HAVE_GENERIC_DMA_COHERENT bool diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index 355d16acee6d..d5bb51cf27c6 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -132,8 +132,7 @@ again: goto again; } - if (IS_ENABLED(CONFIG_ZONE_DMA) && - phys_mask < DMA_BIT_MASK(32) && !(gfp & GFP_DMA)) { + if (IS_ENABLED(CONFIG_ZONE_DMA) && !(gfp & GFP_DMA)) { gfp = (gfp & ~GFP_DMA32) | GFP_DMA; goto again; } diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index a11006b6d8e8..ef2aba503467 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -207,7 +207,6 @@ int dma_mmap_attrs(struct device *dev, struct vm_area_struct *vma, } EXPORT_SYMBOL(dma_mmap_attrs); -#ifndef ARCH_HAS_DMA_GET_REQUIRED_MASK static u64 dma_default_get_required_mask(struct device *dev) { u32 low_totalram = ((max_pfn - 1) << PAGE_SHIFT); @@ -238,7 +237,6 @@ u64 dma_get_required_mask(struct device *dev) return dma_default_get_required_mask(dev); } EXPORT_SYMBOL_GPL(dma_get_required_mask); -#endif #ifndef arch_dma_alloc_attrs #define arch_dma_alloc_attrs(dev) (true) @@ -318,18 +316,23 @@ int dma_supported(struct device *dev, u64 mask) } EXPORT_SYMBOL(dma_supported); -#ifndef HAVE_ARCH_DMA_SET_MASK +#ifdef CONFIG_ARCH_HAS_DMA_SET_MASK +void arch_dma_set_mask(struct device *dev, u64 mask); +#else +#define arch_dma_set_mask(dev, mask) do { } while (0) +#endif + int dma_set_mask(struct device *dev, u64 mask) { if (!dev->dma_mask || !dma_supported(dev, mask)) return -EIO; + arch_dma_set_mask(dev, mask); dma_check_mask(dev, mask); *dev->dma_mask = mask; return 0; } EXPORT_SYMBOL(dma_set_mask); -#endif #ifndef CONFIG_ARCH_HAS_DMA_SET_COHERENT_MASK int dma_set_coherent_mask(struct device *dev, u64 mask) diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c index 1fb6fd68b9c7..6d0236bd3929 100644 --- a/kernel/dma/swiotlb.c +++ b/kernel/dma/swiotlb.c @@ -650,15 +650,3 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr, return true; } - -/* - * Return whether the given device DMA address mask can be supported - * properly. For example, if your device can only drive the low 24-bits - * during bus mastering, then you would pass 0x00ffffff as the mask to - * this function. - */ -int -swiotlb_dma_supported(struct device *hwdev, u64 mask) -{ - return __phys_to_dma(hwdev, io_tlb_end - 1) <= mask; -} |