linux-kernel - RE: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers

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Date:	Wed, 13 May 2015 16:42:31 +0000
From:	"Hefty, Sean" <sean.hefty@...el.com>
To:	Doug Ledford <dledford@...hat.com>,
	Michael Wang <yun.wang@...fitbricks.com>
CC:	Roland Dreier <roland@...nel.org>,
	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>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	"Weiny, Ira" <ira.weiny@...el.com>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Subject: RE: [PATCH RFC] Documentation/infiniband: Add docs for rdma-helpers

> > +  rdma_cap_ib_cm
> > +  ---------------
> > +    Communication Manager (CM) will handle the connections between
>        ^Connection Manager (CM) service, used to ease the process of

In IB terms, this is communication manager.  It also handles transport level address resolution for UD QPs.

> > +  rdma_cap_eth_ah
> > +  ---------------
> > +    Infiniband address handler format is special in ethernet fabric,
> use
> > +    the helper to verify whether the port is using ethernet format or
> not.
> 
> This helper is true when the address of the specific connection is of
> the Ethernet (RoCE) variety.

This is used for connectionless communication.