[PATCHv3 net-next 21/22] net: mvpp2: set dma mask and coherent dma mask on PPv2.2
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Tue Mar 7 10:12:01 PST 2017
Hello,
On Tue, 7 Mar 2017 17:24:21 +0000, David Laight wrote:
> Are the coherent mappings just used for ring structures?
> If it might be reasonable to allocate them as a single entity,
> thus guaranteeing they all reside in a single 4G region.
Do we have the guarantee that a DMA coherent allocation will not span a
4G boundary?
Thanks,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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