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| author | Christoph Hellwig <hch@lst.de> | 2018-09-30 16:13:33 -0700 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-10-19 08:48:28 +0200 |
| commit | fafadcd16595c1df82df399f62421718ec9bf70a (patch) | |
| tree | c13da3c6e387183a5edd19349ed195c0699ac116 /arch/arm64/mm/dma-mapping.c | |
| parent | c4dae366925f929749b2a26efa53b561904a9a4f (diff) | |
| download | linux-fafadcd16595c1df82df399f62421718ec9bf70a.tar.bz2 | |
swiotlb: don't dip into swiotlb pool for coherent allocations
All architectures that support swiotlb also have a zone that backs up
these less than full addressing allocations (usually ZONE_DMA32).
Because of that it is rather pointless to fall back to the global swiotlb
buffer if the normal dma direct allocation failed - the only thing this
will do is to eat up bounce buffers that would be more useful to serve
streaming mappings.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/arm64/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index 8d91b927e09e..eee6cfcfde9e 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -112,7 +112,7 @@ static void *__dma_alloc(struct device *dev, size_t size, return addr; } - ptr = swiotlb_alloc(dev, size, dma_handle, flags, attrs); + ptr = dma_direct_alloc_pages(dev, size, dma_handle, flags, attrs); if (!ptr) goto no_mem; @@ -133,7 +133,7 @@ static void *__dma_alloc(struct device *dev, size_t size, return coherent_ptr; no_map: - swiotlb_free(dev, size, ptr, *dma_handle, attrs); + dma_direct_free_pages(dev, size, ptr, *dma_handle, attrs); no_mem: return NULL; } @@ -151,7 +151,7 @@ static void __dma_free(struct device *dev, size_t size, return; vunmap(vaddr); } - swiotlb_free(dev, size, swiotlb_addr, dma_handle, attrs); + dma_direct_free_pages(dev, size, swiotlb_addr, dma_handle, attrs); } static dma_addr_t __swiotlb_map_page(struct device *dev, struct page *page, |