Messages in this thread | | | Date | Sun, 16 Apr 2023 08:30:28 +0200 | From | Christoph Hellwig <> | Subject | Re: [RFC PATCH] dma: coherent: respect to device 'dma-coherent' property |
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On Fri, Apr 14, 2023 at 04:03:07PM +0800, Zhiqiang Hou wrote: > From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com> > > Currently, the coherent DMA memory is always mapped as writecombine > and uncached, ignored the 'dma-coherent' property in device node, > this patch is to map the memory as writeback and cached when the > device has 'dma-coherent' property.
What is the use case here? The somewhat misnamed per-device coherent memory is intended for small per-device pools of sram or such used for staging memory.
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