mlxsw: spectrum_buffers: Add struct mlxsw_sp_hdroom

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The port headroom handling is currently strewn across several modules and
tricky to follow: MTU, DCB PFC, DCB ETS and ethtool pause all influence the
settings, and then there is the completely separate initial configuraion in
spectrum_buffers. A following patch will implement the dcbnl_setbuffer
callback, which is going to further complicate the landscape.

In order to simplify work with port buffers, the following patches are
going to centralize all port-buffer handling in spectrum_buffers. As a
first step, introduce a (currently empty) struct mlxsw_sp_hdroom that will
keep the configuration parameters, and allocate and free it in appropriate
places.

Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Petr Machata 2020-09-16 09:35:14 +03:00 • committed by David S. Miller

parent 045e42f3e6

commit 3a77f5a2d2

3 changed files with 25 additions and 2 deletions

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2

drivers/net/ethernet/mellanox/mlxsw/spectrum.c

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drivers/net/ethernet/mellanox/mlxsw/spectrum.h

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drivers/net/ethernet/mellanox/mlxsw/spectrum_buffers.c

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