From: Danielle Ratson <danieller@nvidia.com>
To: <netdev@vger.kernel.org>
Cc: <davem@davemloft.net>, <kuba@kernel.org>, <jiri@nvidia.com>,
<andrew@lunn.ch>, <f.fainelli@gmail.com>, <mkubecek@suse.cz>,
<mlxsw@nvidia.com>, <idosch@nvidia.com>,
Danielle Ratson <danieller@nvidia.com>
Subject: [PATCH net-next v3 0/7] Support setting lanes via ethtool
Date: Wed, 20 Jan 2021 11:37:06 +0200 [thread overview]
Message-ID: <20210120093713.4000363-1-danieller@nvidia.com> (raw)
Some speeds can be achieved with different number of lanes. For example,
100Gbps can be achieved using two lanes of 50Gbps or four lanes of
25Gbps. This patchset adds a new selector that allows ethtool to
advertise link modes according to their number of lanes and also force a
specific number of lanes when autonegotiation is off.
Advertising all link modes with a speed of 100Gbps that use two lanes:
$ ethtool -s swp1 speed 100000 lanes 2 autoneg on
Forcing a speed of 100Gbps using four lanes:
$ ethtool -s swp1 speed 100000 lanes 4 autoneg off
Patchset overview:
Patch #1 allows user space to configure the desired number of lanes.
Patch #2-#3 adjusts ethtool to dump to user space the number of lanes
currently in use.
Patches #4-#6 add support for lanes configuration in mlxsw.
Patch #7 adds a selftest.
v3:
* Patch #1: Change ethtool_ops.capabilities to be a bitfield,
and set min and max for the lanes policy.
* Patch #2: Remove LINK_MODE_UNKNOWN and move the speed, duplex
and lanes derivation to the wrapper
__ethtool_get_link_ksettings().
* Patch #5: Set the bitfield of supporting lanes in the driver to 'true'.
* Patch #7: Move the test to drivers/net/mlxsw.
v2:
* Patch #1: Remove ETHTOOL_LANES defines and simply use a number
instead.
* Patches #2,#6: Pass link mode from driver to ethtool instead
* of the parameters themselves.
* Patch #5: Add an actual width field for spectrum-2 link modes
in order to set the suitable link mode when lanes parameter is
passed.
* Patch #6: Changed lanes to be unsigned in
'struct link_mode_info'.
* Patch #7: Remove the test for recieving max_width when lanes
* is not set by user. When not setting lanes, we don't promise
anything regarding what number of lanes will be chosen.
Danielle Ratson (7):
ethtool: Extend link modes settings uAPI with lanes
ethtool: Get link mode in use instead of speed and duplex parameters
ethtool: Expose the number of lanes in use
mlxsw: ethtool: Remove max lanes filtering
mlxsw: ethtool: Add support for setting lanes when autoneg is off
mlxsw: ethtool: Pass link mode in use to ethtool
net: selftests: Add lanes setting test
Documentation/networking/ethtool-netlink.rst | 11 +-
.../net/ethernet/mellanox/mlxsw/spectrum.h | 13 +-
.../mellanox/mlxsw/spectrum_ethtool.c | 196 +++++++++++-------
include/linux/ethtool.h | 5 +
include/uapi/linux/ethtool.h | 2 +
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/common.c | 114 ++++++++++
net/ethtool/common.h | 7 +
net/ethtool/ioctl.c | 18 +-
net/ethtool/linkmodes.c | 179 +++++-----------
net/ethtool/netlink.h | 2 +-
.../drivers/net/mlxsw/ethtool_lanes.sh | 188 +++++++++++++++++
.../selftests/net/forwarding/ethtool_lib.sh | 34 +++
tools/testing/selftests/net/forwarding/lib.sh | 28 +++
14 files changed, 576 insertions(+), 222 deletions(-)
create mode 100755 tools/testing/selftests/drivers/net/mlxsw/ethtool_lanes.sh
--
2.26.2
next reply other threads:[~2021-01-20 11:12 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-20 9:37 Danielle Ratson [this message]
2021-01-20 9:37 ` [PATCH net-next v3 1/7] ethtool: Extend link modes settings uAPI with lanes Danielle Ratson
2021-01-20 22:35 ` Edwin Peer
2021-02-02 18:08 ` Danielle Ratson
2021-01-22 3:44 ` Jakub Kicinski
2021-01-25 15:53 ` Danielle Ratson
2021-01-25 19:02 ` Jakub Kicinski
2021-01-20 9:37 ` [PATCH net-next v3 2/7] ethtool: Get link mode in use instead of speed and duplex parameters Danielle Ratson
2021-01-20 23:39 ` Edwin Peer
2021-01-24 8:36 ` Danielle Ratson
2021-01-25 18:03 ` Edwin Peer
2021-01-26 17:06 ` Danielle Ratson
2021-01-26 17:14 ` Edwin Peer
2021-01-27 13:22 ` Danielle Ratson
2021-01-28 20:26 ` Michal Kubecek
2021-01-31 15:33 ` Danielle Ratson
2021-01-31 17:39 ` Edwin Peer
2021-02-01 13:49 ` Danielle Ratson
2021-02-01 18:14 ` Edwin Peer
2021-02-01 20:29 ` Jakub Kicinski
2021-02-01 21:05 ` Edwin Peer
2021-02-01 21:41 ` Jakub Kicinski
2021-02-01 21:59 ` Edwin Peer
2021-02-01 22:20 ` Jakub Kicinski
2021-02-02 0:14 ` Edwin Peer
2021-02-02 1:08 ` Jakub Kicinski
2021-01-20 9:37 ` [PATCH net-next v3 3/7] ethtool: Expose the number of lanes in use Danielle Ratson
2021-01-20 9:37 ` [PATCH net-next v3 4/7] mlxsw: ethtool: Remove max lanes filtering Danielle Ratson
2021-01-20 9:37 ` [PATCH net-next v3 5/7] mlxsw: ethtool: Add support for setting lanes when autoneg is off Danielle Ratson
2021-01-20 9:37 ` [PATCH net-next v3 6/7] mlxsw: ethtool: Pass link mode in use to ethtool Danielle Ratson
2021-01-20 9:37 ` [PATCH net-next v3 7/7] net: selftests: Add lanes setting test Danielle Ratson
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