From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jiri Pirko Subject: Re: [RFC 0/3] Adding config get/set to devlink Date: Thu, 12 Oct 2017 17:04:19 +0200 Message-ID: <20171012150419.GI14672@nanopsycho> References: <1507815262-33294-1-git-send-email-steven.lin1@broadcom.com> <20171012144032.GG14672@nanopsycho> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Steve Lin , "netdev@vger.kernel.org" , Jiri Pirko , "davem@davemloft.net" , michael.chan@broadcom.com, linux-pci@vger.kernel.org, "John W. Linville" , gospo@broadcom.com To: Roopa Prabhu Return-path: Received: from mail-wm0-f68.google.com ([74.125.82.68]:56600 "EHLO mail-wm0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752454AbdJLPEV (ORCPT ); Thu, 12 Oct 2017 11:04:21 -0400 Received: by mail-wm0-f68.google.com with SMTP id l68so14186813wmd.5 for ; Thu, 12 Oct 2017 08:04:20 -0700 (PDT) Content-Disposition: inline In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: Thu, Oct 12, 2017 at 04:46:24PM CEST, roopa@cumulusnetworks.com wrote: >On Thu, Oct 12, 2017 at 7:40 AM, Jiri Pirko wrote: >> Thu, Oct 12, 2017 at 04:35:10PM CEST, roopa@cumulusnetworks.com wrote: >>>On Thu, Oct 12, 2017 at 6:34 AM, Steve Lin wrote: >>>> Adds a devlink command for getting & setting device configuration >>>> parameters, and enumerates a bunch of those parameters as devlink >>>> attributes. Also introduces an attribute that can be set by a >>>> driver to indicate that the config change doesn't take effect >>>> until the next restart (as in the case of the bnxt driver changes >>>> in this patchset, for which all the configuration changes affect NVM >>>> only, and aren't loaded until the next restart.) >>>> >>>> bnxt driver patches make use of these new devlink cmds/attributes. >>>> >>>> Steve Lin (3): >>>> devlink: Add config parameter get/set operations >>>> bnxt: Move generic devlink code to new file >>>> bnxt: Add devlink support for config get/set >>>> >>> >>>Is the goal here to move all ethtool operations to devlink (I saw some >>>attrs related to speed etc). ?. >>>We do need to move ethtool attrs to netlink and devlink is a good >>>place (and of-course leave the current ethtool api around for backward >>>compatibility). >> >> We need to make sure we are not moving things to devlink which don't >> belong there. All options that use "netdev" as a handle should go into >> rtnetlink instead. >> > >Any reason you want to keep that restriction ?. >FWIS, devlink is a driver api just like ethtool is. >and ethtool needs to move to netlink soon...and It would be better to >not put the rtnl_lock burden on ethtool driver operations. Instead of >adding yet another driver api, extending devlink seems like a great >fit to me. Hmm, the original purpose of devlink was to obtain iface for things that could not use "netdev" as a handle. I try to stick with it as we already have iface for things that could use "netdev" as a handle - rtnetlink. Not sure we want to go this way and add "netdev"-handle things into devlink. Thoughts?