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The PGT (Port Group Table) table maps an index to a bitmap of local ports to which a packet needs to be replicated. This table is used for layer 2 multicast and flooding. The index to PGT table which is called 'mid_index', is a result of 'mid_base' + 'fid_offset'. Using the legacy bridge model, firmware configures 'mid_base'. However, using the new model, software is responsible to configure it via SFGC register. The first 15K entries will be used for flooding and the rest for multicast. The table will look as follows: +----------------------------+ | | | 802.1q, unicast flooding | 4K entries | | +----------------------------+ | | | 802.1q, multicast flooding | 4K entries | | +----------------------------+ | | | 802.1q, broadcast flooding | 4K entries | | +----------------------------+ | 802.1d, unicast flooding | 1K entries +----------------------------+ | 802.1d, multicast flooding | 1K entries +----------------------------+ | 802.1d, broadcast flooding | 1K entries +----------------------------+ | | | | | Multicast entries | The rest of the table | | | | +----------------------------+ Add 'pgt_base' to 'struct mlxsw_sp_fid_family' and use it to calculate MID base, set 'SFGC.mid_base' as part of flood tables initialization. Signed-off-by: Amit Cohen <amcohen@nvidia.com> Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com> |
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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.