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

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Message-ID: <DB4PR05MB086367DF92CEE1977D8EB0AEB1EC0@DB4PR05MB0863.eurprd05.prod.outlook.com>
Date:	Fri, 24 Apr 2015 15:12:13 +0000
From:	Liran Liss <liranl@...lanox.com>
To:	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-rdma@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:	Steve Wise <swise@...ngridcomputing.com>,
	Tom Talpey <tom@...pey.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	Doug Ledford <dledford@...hat.com>,
	Ira Weiny <ira.weiny@...el.com>,
	Tom Tucker <tom@...ngridcomputing.com>,
	Hoang-Nam Nguyen <hnguyen@...ibm.com>,
	"raisch@...ibm.com" <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()

> From: linux-rdma-owner@...r.kernel.org [mailto:linux-rdma-
> 
[snip]
> a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index
> 65994a1..d54f91e 100644
> --- a/include/rdma/ib_verbs.h
> +++ b/include/rdma/ib_verbs.h
> @@ -75,10 +75,13 @@ enum rdma_node_type {  };
> 
>  enum rdma_transport_type {
> +	/* legacy for users */
>  	RDMA_TRANSPORT_IB,
>  	RDMA_TRANSPORT_IWARP,
>  	RDMA_TRANSPORT_USNIC,
> -	RDMA_TRANSPORT_USNIC_UDP
> +	RDMA_TRANSPORT_USNIC_UDP,
> +	/* new transport */
> +	RDMA_TRANSPORT_IBOE,

Remove RDMA_TRANSPORT_IBOE - it is not a transport.
ROCE uses IBTA transport.

If any code should test for ROCE should invoke a specific helper, e.g., rdma_protocol_iboe().
This is  what you currently call "rdma_tech_iboe" is patch 02/26.

I think that pretty much everybody agrees that rdma_protocol_*() is a better name than rdma_tech_*(), right?
So, let's change this.

The semantics are: "check that a link supports a certain wire protocol, or a set of wire protocols", where 'certain'
refers to the specific helper...


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