mlxsw: Add a helper function for getting maximum LAG ID

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Currently the driver queries the maximum supported LAG ID from firmware.
This will not be accurate anymore once the driver will configure 'max_lag'
via CONFIG_PROFILE command.

For resource query, firmware returns the maximum LAG ID which is supported
by hardware. Software can configure firmware to do not allocate entries for
all the supported LAGs, and to limit LAG IDs. In this case, the resource
query will not return the actual maximum LAG ID.

Add a helper function for getting this value. In case that 'max_lag' field
was set during initialization, return the value which was used, otherwise,
query firmware for the maximum supported ID.

Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Amit Cohen 2022-08-26 18:06:51 +02:00 • committed by Jakub Kicinski

parent eb907e9779

commit cf735d4c9b

3 changed files with 36 additions and 11 deletions

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25

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

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2

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

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20

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

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