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Date:   Sat, 1 Feb 2020 10:38:45 +0200
From:   Leon Romanovsky <leon@kernel.org>
To:     Dimitrios Dimitropoulos <d.dimitropoulos@imatrex.com>
Cc:     linux-rdma@vger.kernel.org
Subject: Re: RDMA without rdma_create_event_channel()
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On Fri, Jan 31, 2020 at 09:00:24PM -0800, Dimitrios Dimitropoulos wrote:
> Hi,
>
> I'm looking to connect an RDMA hardware accelerator to a Centos 8.0
> server with RoCE_V2 capability.
>
> Is there a way to implement RDMA RC functionality without invoking the
> Connection Manager (skipping the rdma_create_event_channel()) ?
> Perhaps with a simple exchange of the necessary information through an
> external protocol, say UDP packets ? And then initialize the QPs with
> the received parameters.


You can do it without RDMA-CM, see libibverbs//examples/rc_pingpong.c
for exactly that.

Thanks