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authorChristoph Hellwig <hch@lst.de>2020-11-24 16:38:40 +0100
committerChristoph Hellwig <hch@lst.de>2021-02-09 18:01:38 +0100
commit81d88ce55092edf1a1f928efb373f289c6b90efd (patch)
tree5a1706ea280e7f9a653512ff492bbcc6129485e7 /kernel
parent9dc00b25eadf2908ae76ac0607b55a9f4e0e0cdc (diff)
dma-mapping: remove the {alloc,free}_noncoherent methods
It turns out allowing non-contigous allocations here was a rather bad idea, as we'll now need to define ways to get the pages for mmaping or dma_buf sharing. Revert this change and stick to the original concept. A different API for the use case of non-contigous allocations will be added back later. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Tomasz Figa <tfiga@chromium.org> Tested-by: Ricardo Ribalda <ribalda@chromium.org>:wq
Diffstat (limited to 'kernel')
-rw-r--r--kernel/dma/mapping.c40
1 files changed, 0 insertions, 40 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index f87a89d08654..68992e35c8c3 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -515,46 +515,6 @@ void dma_free_pages(struct device *dev, size_t size, struct page *page,
}
EXPORT_SYMBOL_GPL(dma_free_pages);
-void *dma_alloc_noncoherent(struct device *dev, size_t size,
- dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp)
-{
- const struct dma_map_ops *ops = get_dma_ops(dev);
- void *vaddr;
-
- if (!ops || !ops->alloc_noncoherent) {
- struct page *page;
-
- page = dma_alloc_pages(dev, size, dma_handle, dir, gfp);
- if (!page)
- return NULL;
- return page_address(page);
- }
-
- size = PAGE_ALIGN(size);
- vaddr = ops->alloc_noncoherent(dev, size, dma_handle, dir, gfp);
- if (vaddr)
- debug_dma_map_page(dev, virt_to_page(vaddr), 0, size, dir,
- *dma_handle);
- return vaddr;
-}
-EXPORT_SYMBOL_GPL(dma_alloc_noncoherent);
-
-void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, enum dma_data_direction dir)
-{
- const struct dma_map_ops *ops = get_dma_ops(dev);
-
- if (!ops || !ops->free_noncoherent) {
- dma_free_pages(dev, size, virt_to_page(vaddr), dma_handle, dir);
- return;
- }
-
- size = PAGE_ALIGN(size);
- debug_dma_unmap_page(dev, dma_handle, size, dir);
- ops->free_noncoherent(dev, size, vaddr, dma_handle, dir);
-}
-EXPORT_SYMBOL_GPL(dma_free_noncoherent);
-
int dma_supported(struct device *dev, u64 mask)
{
const struct dma_map_ops *ops = get_dma_ops(dev);