netdev - Re: [PATCH 07/22] RDMA/irdma: Register an auxiliary driver and implement private channel OPs

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Message-ID: <20210201191952.GP4247@nvidia.com>
Date:   Mon, 1 Feb 2021 15:19:52 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     "Saleem, Shiraz" <shiraz.saleem@...el.com>
CC:     Leon Romanovsky <leon@...nel.org>,
        "dledford@...hat.com" <dledford@...hat.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Ertman, David M" <david.m.ertman@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "Ismail, Mustafa" <mustafa.ismail@...el.com>
Subject: Re: [PATCH 07/22] RDMA/irdma: Register an auxiliary driver and
 implement private channel OPs

On Sat, Jan 30, 2021 at 01:19:22AM +0000, Saleem, Shiraz wrote:

> Do you mean 2 different auxiliary device names - one for RoCE and
> iWARP?  The drv.probe() and other callbacks will be very similar for
> gen2, so one gen2 aux driver which can bind to iW and RoCE aux
> device should suffice.

You probably end up with three aux device names, gen 1, gen 2 roce and
gen 2 iwarp

Certainly flipping modes should change the device name. This helps
keep everything synchronized, since you delete a device and wait for
all drivers to unbind then create a new device with a different
name.

Jason