netdev - [PATCH net-next 0/5] mlxsw: Handle MTU values

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Date: Thu, 13 Jun 2024 16:07:53 +0200
From: Petr Machata <petrm@...dia.com>
To: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
	<edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, <netdev@...r.kernel.org>
CC: Ido Schimmel <idosch@...dia.com>, Petr Machata <petrm@...dia.com>, "Amit
 Cohen" <amcohen@...dia.com>, <mlxsw@...dia.com>
Subject: [PATCH net-next 0/5] mlxsw: Handle MTU values

Amit Cohen writes:

The driver uses two values for maximum MTU, but neither is accurate.
In addition, the value which is configured to hardware is not calculated
correctly. Handle these issues and expose accurate values for minimum
and maximum MTU per netdevice.

Add test cases to check that the exposed values are really supported.

Patch set overview:
Patches #1-#3 set the driver to use accurate values for MTU
Patch #4 aligns the driver to always use the same value for maximum MTU
Patch #5 adds a test

Amit Cohen (5):
  mlxsw: port: Edit maximum MTU value
  mlxsw: Adjust MTU value to hardware check
  mlxsw: spectrum: Set more accurate values for netdevice min/max MTU
  mlxsw: Use the same maximum MTU value throughout the driver
  selftests: forwarding: Add test for minimum and maximum MTU

 drivers/net/ethernet/mellanox/mlxsw/port.h    |   3 +-
 .../net/ethernet/mellanox/mlxsw/spectrum.c    |  31 +-
 .../net/ethernet/mellanox/mlxsw/spectrum.h    |   1 -
 .../mellanox/mlxsw/spectrum_buffers.c         |   8 +-
 .../testing/selftests/net/forwarding/Makefile |   1 +
 .../selftests/net/forwarding/min_max_mtu.sh   | 283 ++++++++++++++++++
 6 files changed, 295 insertions(+), 32 deletions(-)
 create mode 100755 tools/testing/selftests/net/forwarding/min_max_mtu.sh

-- 
2.45.0