Re: [RFC PATCH 1/5] pci/p2p: add a function to test peer to peer capability

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On Tue, Jan 29, 2019 at 3:25 PM Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote:
>
>
>
> On 2019-01-29 12:56 p.m., Alex Deucher wrote:
> > On Tue, Jan 29, 2019 at 12:47 PM <jglisse@xxxxxxxxxx> wrote:
> >>
> >> From: Jérôme Glisse <jglisse@xxxxxxxxxx>
> >>
> >> device_test_p2p() return true if two devices can peer to peer to
> >> each other. We add a generic function as different inter-connect
> >> can support peer to peer and we want to genericaly test this no
> >> matter what the inter-connect might be. However this version only
> >> support PCIE for now.
> >>
> >
> > What about something like these patches:
> > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=4fab9ff69cb968183f717551441b475fabce6c1c
> > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=f90b12d41c277335d08c9dab62433f27c0fadbe5
> > They are a bit more thorough.
>
> Those new functions seem to have a lot of overlap with the code that is
> already upstream in p2pdma.... Perhaps you should be improving the
> p2pdma functions if they aren't suitable for what you want already
> instead of creating new ones.

Could be.  Those patches are pretty old.  They probably need to be
rebased on the latest upstream p2p stuff.

Alex





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