Re: [PATCH 4/6] MIPS: Loongson: Add DMA support for 7A1000

[Christoph Hellwig]

On Mon, Mar 09, 2020 at 04:23:24PM +0800, Tiezhu Yang wrote:
> Implement __phys_to_dma() and __dma_to_phys() according to the
> node id offset in 7A1000 DMA route config register.

Can you just switch Loongson over to use the dma_pfn_offset field in
struct device?  I'd love to kill the __phys_to_dma and __dma_to_phys
hooks wherever possible.