linux-kernel - Re: [PATCH 0/1] add support for enum module parameters

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Message-ID: <20220422134405.7a519a0f@kernel.org>
Date:   Fri, 22 Apr 2022 13:44:05 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Kalle Valo <kvalo@...nel.org>
Cc:     Jani Nikula <jani.nikula@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Lucas De Marchi <lucas.demarchi@...el.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH 0/1] add support for enum module parameters

On Wed, 20 Apr 2022 08:13:47 +0300 Kalle Valo wrote:
> Wireless drivers would also desperately need to pass device specific
> parameters at (or before) probe time. And not only debug parameters but
> also configuration parameters, for example firmware memory allocations
> schemes (optimise for features vs number of clients etc) and whatnot.
> 
> Any ideas how to implement that? Is there any prior work for anything
> like this? This is pretty hard limiting usability of upstream wireless
> drivers and I really want to find a proper solution.

In netdev we have devlink which is used for all sort of device
configuration. devlink-resource sounds like what you need,
but it'd have to be extended to support configuration which requires
reload/re-probe. Currently only devlink-params support that but params
were a mistake so don't use that.