From: Edwin Peer <edwin.peer@broadcom.com>
To: Danielle Ratson <danieller@nvidia.com>
Cc: Michal Kubecek <mkubecek@suse.cz>, Jiri Pirko <jiri@resnulli.us>,
Andrew Lunn <andrew@lunn.ch>, Jakub Kicinski <kuba@kernel.org>,
Ido Schimmel <idosch@idosch.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
Jiri Pirko <jiri@nvidia.com>,
"f.fainelli@gmail.com" <f.fainelli@gmail.com>,
mlxsw <mlxsw@nvidia.com>, Ido Schimmel <idosch@nvidia.com>,
"johannes@sipsolutions.net" <johannes@sipsolutions.net>
Subject: Re: [PATCH net-next 1/6] ethtool: Extend link modes settings uAPI with lanes
Date: Tue, 1 Dec 2020 17:17:33 -0800 [thread overview]
Message-ID: <CAKOOJTw90wcw=JZfXYGCrCK1GdxkRwgbjA5x5aKfBoE3GkW9jw@mail.gmail.com> (raw)
In-Reply-To: <DM6PR12MB4516576B5D5B225540A1C877D8F40@DM6PR12MB4516.namprd12.prod.outlook.com>
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On Tue, Dec 1, 2020 at 9:23 AM Danielle Ratson <danieller@nvidia.com> wrote:
> The suggestions I have are:
> 1. Add a bit that for unknown media for each link (something like ETHTOOL_LINK_MODE_100000unknown_Full_BIT). I am not sure it is even possible or makes sense.
> 2. Pass the link mode as bitmap.
>
> Do you see any other option?
Other options include:
1) Let the user specify link encoding directly, as we do for FEC. This would
imply the number of lanes used at a given speed rather than the other way
around. Then you only need a handful of indices in the enum.
2) Instead of an enum, encode the semantics into the link mode bit
representation. N bits define the speed. Other bits define the encoding,
number of lanes, media, etc. This would solve the problem of decoding the
intent from a single user selected link mode index, but would require a v2
UABI. The user could have the same strings, but not much more. And then,
it's probably better to give each dimension their own field in a struct and be
done, lest we run out of bits. Let the user space tool map the link mode
string onto the appropriate struct values.
Regards,
Edwin Peer
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next prev parent reply other threads:[~2020-12-02 1:18 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-10 15:41 [PATCH net-next 0/6] Support setting lanes via ethtool Ido Schimmel
2020-10-10 15:41 ` [PATCH net-next 1/6] ethtool: Extend link modes settings uAPI with lanes Ido Schimmel
2020-10-11 22:37 ` Jakub Kicinski
2020-10-12 15:33 ` Danielle Ratson
2020-10-12 15:58 ` Jakub Kicinski
2020-10-13 14:29 ` Danielle Ratson
2020-10-13 15:43 ` Jakub Kicinski
2020-10-16 22:15 ` Andrew Lunn
2020-10-19 7:19 ` Danielle Ratson
2020-10-19 11:04 ` Michal Kubecek
2020-10-19 12:26 ` Jiri Pirko
2020-10-19 13:24 ` Michal Kubecek
2020-10-20 7:39 ` Danielle Ratson
2020-10-21 7:08 ` Michal Kubecek
2020-10-21 7:20 ` Danielle Ratson
2020-10-21 8:47 ` Michal Kubecek
2020-10-22 6:15 ` Danielle Ratson
2020-10-22 16:27 ` Michal Kubecek
2020-11-23 9:47 ` Danielle Ratson
2020-11-24 22:12 ` Michal Kubecek
2020-11-25 10:35 ` Danielle Ratson
2020-11-26 21:07 ` Michal Kubecek
2020-12-01 17:22 ` Danielle Ratson
2020-12-02 0:52 ` Edwin Peer
2020-12-02 1:17 ` Edwin Peer [this message]
2020-10-19 12:24 ` Jiri Pirko
2020-10-19 12:38 ` Andrew Lunn
2020-10-12 16:40 ` Michal Kubecek
2020-10-12 19:10 ` Johannes Berg
2020-10-12 20:08 ` Jakub Kicinski
2020-10-12 17:03 ` Michal Kubecek
2020-11-19 20:38 ` Edwin Peer
2020-11-23 9:40 ` Jiri Pirko
2020-11-30 17:01 ` Edwin Peer
2020-11-30 17:14 ` Jiri Pirko
2020-11-30 18:00 ` Edwin Peer
2020-12-01 11:22 ` Jiri Pirko
2020-12-02 0:32 ` Edwin Peer
2020-12-02 10:09 ` Jiri Pirko
2020-12-02 17:53 ` Edwin Peer
2020-10-10 15:41 ` [PATCH net-next 2/6] ethtool: Expose the number of lanes in use Ido Schimmel
2020-10-10 15:41 ` [PATCH net-next 3/6] mlxsw: ethtool: Remove max lanes filtering Ido Schimmel
2020-10-10 15:41 ` [PATCH net-next 4/6] mlxsw: ethtool: Add support for setting lanes when autoneg is off Ido Schimmel
2020-10-10 15:41 ` [PATCH net-next 5/6] mlxsw: ethtool: Expose the number of lanes in use Ido Schimmel
2020-10-10 15:41 ` [PATCH net-next 6/6] net: selftests: Add lanes setting test Ido Schimmel
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