Messages in this thread | | | Date | Fri, 27 Mar 2020 14:26:34 +0800 | Subject | Re: [PATCH v2 2/3] MIPS: Loongson: Add DMA support for 7A1000 | From | Jiaxun Yang <> |
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于 2020年3月25日 GMT+08:00 下午9:27:56, Christoph Hellwig <hch@infradead.org> 写到: >On Mon, Mar 23, 2020 at 10:59:14AM +0800, Tiezhu Yang wrote: >> Implement __phys_to_dma() and __dma_to_phys() according to the >> node id offset in the 7A1000 DMA route config register. > >Can you please try to just use the dma_pfn_offset field in struct >device >for all loongson platforms? I'm pretty sure I asked for that last time >around..
Here we have a problem that dma_pfn_offset doesn't fit our platform.
We have multiple dma-ranges that translate in to different address and dma_pfn_offset can only handle single range with fixed offset.
Thanks.
-- Jiaxun Yang
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