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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
(cherry picked from commit fd31496dae939c7bf2ef874e08d4bf8c6ab738b3)
Signed-off-by: Qian-Hao Huang <qhhuang@google.com>
(cherry picked from commit cdc9f6ef94)
This commit is contained in:
Suren Baghdasaryan 2020-03-16 16:39:31 -07:00
parent 37e0a5b868
commit 7d50253c27
2 changed files with 5 additions and 0 deletions
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3
kernel/dma/direct.c
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@ -43,6 +43,7 @@ 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_limit)
@ -320,6 +321,7 @@ void *dma_direct_alloc(struct device *dev, size_t size,
__dma_direct_free_pages(dev, page, size);
return NULL;
}
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)
@ -365,6 +367,7 @@ void dma_direct_free(struct device *dev, size_t size,
__dma_direct_free_pages(dev, dma_direct_to_page(dev, dma_addr), size);
}
EXPORT_SYMBOL_GPL(dma_direct_free);
struct page *dma_direct_alloc_pages(struct device *dev, size_t size,
dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp)

2
kernel/dma/ops_helpers.c
View File

@ -27,6 +27,7 @@ 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);
/*
* Create userspace mapping for the DMA-coherent memory.
@ -57,6 +58,7 @@ int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
return -ENXIO;
#endif /* CONFIG_MMU */
}
EXPORT_SYMBOL_GPL(dma_common_mmap);
struct page *dma_common_alloc_pages(struct device *dev, size_t size,
dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp)