netdev - RE: [RFC net-next 0/8] Introducing subdev bus and devlink extension

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Date:   Wed, 9 Jun 2021 09:52:02 +0000
From:   Parav Pandit <parav@...dia.com>
To:     Yunsheng Lin <linyunsheng@...wei.com>,
        Jakub Kicinski <kuba@...nel.org>
CC:     moyufeng <moyufeng@...wei.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Jiri Pirko <jiri@...nulli.us>,
        Or Gerlitz <gerlitz.or@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "michal.lkml@...kovi.net" <michal.lkml@...kovi.net>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        Jiri Pirko <jiri@...dia.com>,
        Salil Mehta <salil.mehta@...wei.com>,
        "lipeng (Y)" <lipeng321@...wei.com>,
        Guangbin Huang <huangguangbin2@...wei.com>,
        "shenjian15@...wei.com" <shenjian15@...wei.com>,
        "chenhao (DY)" <chenhao288@...ilicon.com>,
        Jiaran Zhang <zhangjiaran@...wei.com>,
        "linuxarm@...neuler.org" <linuxarm@...neuler.org>
Subject: RE: [RFC net-next 0/8] Introducing subdev bus and devlink extension


> From: Yunsheng Lin <linyunsheng@...wei.com>
> Sent: Tuesday, June 8, 2021 5:41 PM

> 
> Is there any reason why VF use its own devlink instance?
Because devlink instance gives the ability for the VF and SF to control itself.
(a) device parameters (devlink dev param show)
(b) resources of the device
(c) health reporters
(d) reload in net ns

There knobs (a) to (c) etc are not for the hypervisor to control. These are mainly for the VF/SF users to manage its own device.