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The ENETC with pseudo MAC is an internal port which connects to the CPU port of the switch. The switch CPU/host ENETC is fully integrated with the switch and does not require a back-to-back MAC, instead a light weight "pseudo MAC" provides the delineation between switch and ENETC. This translates to lower power (less logic and memory) and lower delay (as there is no serialization delay across this link). Different from the standalone ENETC which is used as the external port, the internal ENETC has a different PCIe device ID, and it does not have Ethernet MAC port registers, instead, it has a small number of pseudo MAC port registers, so some features are not supported by pseudo MAC, such as loopback, half duplex, one-step timestamping and so on. Therefore, the configuration of this internal ENETC is also somewhat different from that of the standalone ENETC. So add the basic support for ENETC with pseudo MAC. More supports will be added in the future. Signed-off-by: Wei Fang <wei.fang@nxp.com> Reviewed-by: Claudiu Manoil <claudiu.manoil@nxp.com> Link: https://patch.msgid.link/20251029013900.407583-6-wei.fang@nxp.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 reStructuredText 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.