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From: Edwin Peer <edwin.peer@broadcom.com>
To: Ido Schimmel <idosch@idosch.org>
Cc: netdev <netdev@vger.kernel.org>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	jiri@nvidia.com, danieller@nvidia.com, andrew@lunn.ch,
	f.fainelli@gmail.com, mkubecek@suse.cz, mlxsw@nvidia.com,
	Ido Schimmel <idosch@nvidia.com>
Subject: Re: [PATCH net-next 1/6] ethtool: Extend link modes settings uAPI with lanes
Date: Thu, 19 Nov 2020 12:38:34 -0800	[thread overview]
Message-ID: <CAKOOJTw1rRdS0+WRqeWY4Hc9gzwvPn7FGFdZuVd3hFYORcRz4g@mail.gmail.com> (raw)
In-Reply-To: <20201010154119.3537085-2-idosch@idosch.org>

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On Sat, Oct 10, 2020 at 3:54 PM Ido Schimmel <idosch@idosch.org> wrote:

> Add 'ETHTOOL_A_LINKMODES_LANES' attribute and expand 'struct
> ethtool_link_settings' with lanes field in order to implement a new
> lanes-selector that will enable the user to advertise a specific number
> of lanes as well.

Why can't this be implied by port break-out configuration? For higher
speed signalling modes like PAM4, what's the difference between a
port with unused lanes vs the same port split into multiple logical
ports? In essence, the driver could then always choose the slowest
signalling mode that utilizes all the available lanes.

Regards,
Edwin Peer

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  parent reply	other threads:[~2020-11-19 20:39 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
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 [this message]
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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