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Russell King says: ==================== net: stmmac/xpcs: modernise PCS support This series updates xpcs and stmmac for the recent changes to phylink to better support split PCS and to get rid of private MAC validation functions. This series is slightly more involved than other conversions as stmmac has already had optional proper split PCS support. The first six patches of this series were originally posted on 16th December for CFT, and Wong Vee Khee reported his Intel Elkhart Lake setup was fine the first six these. However, no tested-by was given. The patches: 1) Provide a function to query the xpcs for the interface modes that are supported. 2) Populates the MAC capabilities and switches stmmac_validate() to use phylink_get_linkmodes(). We do not use phylink_generic_validate() yet as (a) we do not always have the supported interfaces populated, and (b) the existing code does not restrict based on interface. There should be no functional effect from this patch. 3) Populates phylink's supported interfaces from the xpcs when the xpcs is configured by firmware and also the firmware configured interface mode. Note: this will restrict stmmac to only supporting these interfaces modes - stmmac maintainers need to verify that this behaviour is acceptable. 4) stmmac_validate() tail-calls xpcs_validate(), but we don't need it to now that PCS have their own validation method. Convert stmmac and xpcs to use this method instead. 5) xpcs sets the poll field of phylink_pcs to true, meaning xpcs requires its status to be polled. There is no need to also set the phylink_config.pcs_poll. Remove this. 6) Switch to phylink_generic_validate(). This is probably the most contravertial change in this patch set as this will cause the MAC to restrict link modes based on the interface mode. From an inspection of the xpcs driver, this should be safe, as XPCS only further restricts the link modes to a subset of these (whether that is correct or not is not an issue I am addressing here.) For implementations that do not use xpcs, this is a more open question and needs feedback from stmmac maintainers. 7) Convert to use mac_select_pcs() rather than phylink_set_pcs() to set the PCS - the intention is to eventually remove phylink_set_pcs() once there are no more users of this. v2: fix signoff and temporary warning in patch 4 ==================== 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.