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Vladimir Oltean says: ==================== Accomodate DSA front-end into Ocelot After the nice "change-my-mind" discussion about Ocelot, Felix and LS1028A (which can be read here: https://lkml.org/lkml/2019/6/21/630), we have decided to take the route of reworking the Ocelot implementation in a way that is DSA-compatible. This is a large series, but hopefully is easy enough to digest, since it contains mostly code refactoring. What needs to be changed: - The struct net_device, phy_device needs to be isolated from Ocelot private structures (struct ocelot, struct ocelot_port). These will live as 1-to-1 equivalents to struct dsa_switch and struct dsa_port. - The function prototypes need to be compatible with DSA (of course, struct dsa_switch will become struct ocelot). - The CPU port needs to be assigned via a higher-level API, not hardcoded in the driver. What is going to be interesting is that the new DSA front-end of Ocelot will need to have features in lockstep with the DSA core itself. At the moment, some more advanced tc offloading features of Ocelot (tc-flower, etc) are not available in the DSA front-end due to lack of API in the DSA core. It also means that Ocelot practically re-implements large parts of DSA (although it is not a DSA switch per se) - see the FDB API for example. The code has been only compile-tested on Ocelot, since I don't have access to any VSC7514 hardware. It was proven to work on NXP LS1028A, which instantiates a DSA derivative of Ocelot. So I would like to ask Alex Belloni if you could confirm this series causes no regression on the Ocelot MIPS SoC. The goal is to get this rework upstream as quickly as possible, precisely because it is a large volume of code that risks gaining merge conflicts if we keep it for too long. This is but the first chunk of the LS1028A Felix DSA driver upstreaming. For those who are interested, the concept can be seen on my private Github repo, the user of this reworked Ocelot driver living under drivers/net/dsa/vitesse/: https://github.com/vladimiroltean/ls1028ardb-linux ==================== Acked-by: Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.