[PATCH v8 00/23] dma-mapping: Track shared DMA state through direct, pool and swiotlb paths

Jason Gunthorpe jgg at ziepe.ca
Wed Jul 22 12:57:09 PDT 2026


On Tue, Jul 21, 2026 at 03:40:56PM +0300, Leon Romanovsky wrote:

> Why don't we continue the effort to remove "struct page" entirely
> from the DMA API internals?
> 
> IMHO, everything not exposed to DMA API users should use
> phys_addr_t, including the DMA address pool.

The alloc interfaces return a struct page, that is why this stuff is
organized like this. Look at dma_alloc_pages()

There is also an API that forms a scatterlist that has to be struct
page as well

Jason



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