RE: [PATCH rdma-next 3/3] RDMA/nldev: Return device protocol

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> -----Original Message-----
> From: Leon Romanovsky <leon@xxxxxxxxxx>
> Sent: Sunday, March 10, 2019 11:42 AM
> To: Parav Pandit <parav@xxxxxxxxxxxx>
> Cc: Doug Ledford <dledford@xxxxxxxxxx>; Jason Gunthorpe
> <jgg@xxxxxxxxxxxx>; RDMA mailing list <linux-rdma@xxxxxxxxxxxxxxx>
> Subject: Re: [PATCH rdma-next 3/3] RDMA/nldev: Return device protocol
> 
> On Sun, Mar 10, 2019 at 04:18:37PM +0000, Parav Pandit wrote:
> >
> >
> > > -----Original Message-----
> > > From: linux-rdma-owner@xxxxxxxxxxxxxxx <linux-rdma-
> > > owner@xxxxxxxxxxxxxxx> On Behalf Of Leon Romanovsky
> > > Sent: Sunday, March 10, 2019 10:28 AM
> > > To: Doug Ledford <dledford@xxxxxxxxxx>; Jason Gunthorpe
> > > <jgg@xxxxxxxxxxxx>
> > > Cc: Leon Romanovsky <leonro@xxxxxxxxxxxx>; RDMA mailing list <linux-
> > > rdma@xxxxxxxxxxxxxxx>
> > > Subject: [PATCH rdma-next 3/3] RDMA/nldev: Return device protocol
> > >
> > > From: Leon Romanovsky <leonro@xxxxxxxxxxxx>
> > >
> > > Reuse existing RDMA_NLDEV_ATTR_LINK_TYPE to give ability for stable
> > > names UDEV rule create Ib device stable names based on link type
> protocol.
> > > The assumption that devices like mlx4 with duality in their link
> > > type under one IB device struct won't be allowed in the future.
> > >
> > I was under impression that it qedr or cavium driver has iwarp and roce
> ports on same hca.
> > Any reason to not have the link type on per port basis?
> 
> Not really, they don't mix link types in one IB device, I remember that Jason
> ensured that during code review.
> 
> > If it already exist at port level, than at device level addition is confusing.
> > It is like having port_num in ah_attr and also in qp_attr.
> 
> It is just a name with already existing index and proper values.
> What name do you think more appropriate? I'll add alias for that, something
> like "RDMA_NLDEV_ATTR_NEW_COOL_NAME =
> RDMA_NLDEV_ATTR_LINK_TYPE"
Why can't we keep it as port attribute?




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