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In the device, LAG identifiers are stored in the port group table (PGT).
During initialization, firmware reserves a certain amount of entries at
the beginning of this table for LAG identifiers.
In Spectrum-4, the size of the PGT table did not increase, but the maximum
number of LAG identifiers was doubled, leaving less room for others entries
(e.g., flood entries) that also reside in the PGT.
Therefore, in order to avoid a regression and as long as there is no
explicit requirement to support 256 LAGs, mlxsw driver will configure the
firmware to allocate the same amount of LAG entries (128) as in
Spectrum-{2,3}. This configuration is done using 'max_lag' field in
CONFIG_PROFILE command. Extend 'struct mlxsw_config_profile' to support
'max_lag' field and configure firmware accordingly.
A next patch will adjust Spectrum-4 to configure 'max_lag' field.
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>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.