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ANDROID: Export functions to be used with dma_map_ops in modules

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For modules to reuse default dma_map_ops implementations they need to be
exported. Export the following functions:

dma_direct_alloc
dma_direct_free
dma_common_mmap
dma_common_get_sgtable
dma_direct_get_required_mask

Bug: 151050914
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: Ia77b797fcd909fce01da7431bfbde282dc70b3b3
This commit is contained in:
Suren Baghdasaryan 2020-03-16 16:39:31 -07:00
parent 3605968cf0
commit fd31496dae
2 changed files with 5 additions and 0 deletions
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3
kernel/dma/direct.c
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@ -49,6 +49,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
}
EXPORT_SYMBOL_GPL(dma_direct_get_required_mask);
static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
u64 *phys_mask)
@ -209,6 +210,7 @@ void *dma_direct_alloc(struct device *dev, size_t size,
return arch_dma_alloc(dev, size, dma_handle, gfp, attrs);
return dma_direct_alloc_pages(dev, size, dma_handle, gfp, attrs);
}
EXPORT_SYMBOL_GPL(dma_direct_alloc);
void dma_direct_free(struct device *dev, size_t size,
void *cpu_addr, dma_addr_t dma_addr, unsigned long attrs)
@ -219,6 +221,7 @@ void dma_direct_free(struct device *dev, size_t size,
else
dma_direct_free_pages(dev, size, cpu_addr, dma_addr, attrs);
}
EXPORT_SYMBOL_GPL(dma_direct_free);
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_SWIOTLB)

2
kernel/dma/mapping.c
View File

@ -135,6 +135,7 @@ int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
sg_set_page(sgt->sgl, page, PAGE_ALIGN(size), 0);
return ret;
}
EXPORT_SYMBOL_GPL(dma_common_get_sgtable);
/*
* The whole dma_get_sgtable() idea is fundamentally unsafe - it seems
@ -221,6 +222,7 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
return -ENXIO;
#endif /* CONFIG_MMU */
}
EXPORT_SYMBOL_GPL(dma_common_mmap);
/**
* dma_can_mmap - check if a given device supports dma_mmap_*