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swiotlb: merge swiotlb_unmap_page and unmap_single 

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Christoph Hellwig 2018-04-12 09:56:56 +02:00
parent dff8d6c1ed
commit 27744e0077
1 changed files with 4 additions and 11 deletions
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15
kernel/dma/swiotlb.c
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@ -765,9 +765,9 @@ dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
* After this call, reads by the cpu to the buffer are guaranteed to see
* whatever the device wrote there.
*/
static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
phys_addr_t paddr = dma_to_phys(hwdev, dev_addr);
@ -790,13 +790,6 @@ static void unmap_single(struct device *hwdev, dma_addr_t dev_addr,
dma_mark_clean(phys_to_virt(paddr), size);
}
void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
size_t size, enum dma_data_direction dir,
unsigned long attrs)
{
unmap_single(hwdev, dev_addr, size, dir, attrs);
}
/*
* Make physical memory consistent for a single streaming mode DMA translation
* after a transfer.
@ -900,7 +893,7 @@ swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
BUG_ON(dir == DMA_NONE);
for_each_sg(sgl, sg, nelems, i)
unmap_single(hwdev, sg->dma_address, sg_dma_len(sg), dir,
swiotlb_unmap_page(hwdev, sg->dma_address, sg_dma_len(sg), dir,
attrs);
}