Messages in this thread | | | Date | Tue, 27 Oct 2015 19:30:28 -0700 | From | Nishanth Aravamudan <> | Subject | Re: [PATCH 2/7 v2] powerpc/dma-mapping: override dma_get_page_shift |
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On 28.10.2015 [11:20:05 +0900], Benjamin Herrenschmidt wrote: > On Tue, 2015-10-27 at 18:54 -0700, Nishanth Aravamudan wrote: > > > > In "bypass" mode, what TCE size is used? Is it guaranteed to be 4K? > > None :-) The TCEs are completely bypassed. You get a N:M linear mapping > of all memory starting at 1<<59 PCI side.
Err, duh, sorry! Ok, so in that case, DMA page shift is PAGE_SHIFT, then?
-Nish
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