linux-kernel - Re: [PATCH v6 01/26] IB/Verbs: Implement new callback query

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Date:	Fri, 24 Apr 2015 12:00:02 -0400
From:	Doug Ledford <dledford@...hat.com>
To:	Tom Talpey <tom@...pey.com>
Cc:	Michael Wang <yun.wang@...fitbricks.com>,
	Roland Dreier <roland@...nel.org>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal@....mellanox.co.il>,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org,
	Steve Wise <swise@...ngridcomputing.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Ira Weiny <ira.weiny@...el.com>,
	Tom Tucker <tom@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	Christoph Raisch <raisch@...ibm.com>,
	Mike Marciniszyn <infinipath@...el.com>,
	Eli Cohen <eli@...lanox.com>,
	Faisal Latif <faisal.latif@...el.com>,
	Jack Morgenstein <jackm@....mellanox.co.il>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Haggai Eran <haggaie@...lanox.com>
Subject: Re: [PATCH v6 01/26] IB/Verbs: Implement new callback
 query_transport()

On Fri, 2015-04-24 at 10:46 -0400, Tom Talpey wrote:
> On 4/24/2015 10:35 AM, Michael Wang wrote:
> >
> >
> > On 04/24/2015 04:29 PM, Tom Talpey wrote:
> >> On 4/24/2015 8:23 AM, Michael Wang wrote:
> > [snip]
> >>> +static enum rdma_transport_type
> >>> +mlx5_ib_query_transport(struct ib_device *device, u8 port_num)
> >>> +{
> >>> +    return RDMA_TRANSPORT_IB;
> >>> +}
> >>> +
> >>
> >>
> >> Just noticed that mlx5 is not being coded as RoCE-capable like mlx4.
> >> The mlx5 driver is for the new ConnectX-4, which implements all three
> >> of IB, RoCE and RoCEv2, right? Are those last two not supported?
> >
> > I'm not sure about the details of mlx5, but according to the current
> > implementation, it's transport is IB without a link-layer callback,
> > which means it doesn't support IBoE...
> >
> > And there is no method to change the port link-layer type as mlx4 did.
> 
> Hal, is that correct?

The mlx5 Ethernet driver has not yet been submitted to the linux kernel.
Until it lands, the drive is IB only.  When it does land, it will need
to update this area of code.

-- 
Doug Ledford <dledford@...hat.com>
              GPG KeyID: 0E572FDD



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