netdev - [PATCH net-next 00/15] net: dsa: mv88e6xxx: convert to phylink pcs

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Date:   Mon, 13 Jun 2022 13:59:03 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Andrew Lunn <andrew@...n.ch>,
        Marek Behún <kabel@...nel.org>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Paolo Abeni <pabeni@...hat.com>,
        Robert Hancock <robert.hancock@...ian.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: [PATCH net-next 00/15] net: dsa: mv88e6xxx: convert to phylink pcs

Hi,

This series converts mv88e6xxx to use phylink pcs, which I believe is
the last DSA driver that needs to be converted before we can declare
the whole of DSA as non-phylink legacy.

Briefly:
Patches 1 and 2 introduce a new phylink_pcs_inband() helper to indicate
whether inband AN should be used. Note that the first patch fixes a bug
in the current c22 helper where the SGMII exchange with the PHY would
be disabled when AN is turned off on the PHY copper side.

Patch 3 gets rid of phylink's internal pcs_ops member, preferring
instead to always use the version in the phylink_pcs structure.
Changing this pointer is now no longer supported.

Patch 4 makes PCS polling slightly cleaner, avoiding the poll being
triggered while we're making changes to the configuration.

Patch 5 and 6 introduce several PCS methods that are fundamentally
necessary for mv88e6xxx to work around various issues - for example, in
some devices, the PCS must be powered down when the CMODE field in the
port control register is changed. In other devices, there are
workarounds that need to be performed.

Patch 7 adds unlocked mdiobus and mdiodev accessors to complement the
locking versions that are already there - which are needed for some of
the mv88e6xxx conversions.

Patch 8 prepares DSA as a whole, adding support for the phylink
mac_prepare() and mac_finish() methods. These two methods are used to
force the link down over a major reconfiguration event, which has been
found by people to be necessary on mv88e6xxx devices. These haven't
been required until now as everything has been done via the
mac_config() callback - which won't be true once we switch to
phylink_pcs.

Patch 9 implements patch 8 on this driver.

Patches 10 and 11 prepare mv88e6xxx for the conversion.

Patches 12 through to 14 convert each "serdes" to phylink_pcs.

Patch 15 cleans up after the conversion.

 drivers/net/dsa/mv88e6xxx/Makefile   |    3 +
 drivers/net/dsa/mv88e6xxx/chip.c     |  480 ++++----------
 drivers/net/dsa/mv88e6xxx/chip.h     |   25 +-
 drivers/net/dsa/mv88e6xxx/pcs-6185.c |  158 +++++
 drivers/net/dsa/mv88e6xxx/pcs-6352.c |  383 +++++++++++
 drivers/net/dsa/mv88e6xxx/pcs-639x.c |  834 ++++++++++++++++++++++++
 drivers/net/dsa/mv88e6xxx/port.c     |   30 -
 drivers/net/dsa/mv88e6xxx/serdes.c   | 1164 ++--------------------------------
 drivers/net/dsa/mv88e6xxx/serdes.h   |  110 +---
 drivers/net/phy/mdio_bus.c           |   24 +-
 drivers/net/phy/phylink.c            |  141 ++--
 include/linux/mdio.h                 |   26 +
 include/linux/phylink.h              |   44 ++
 include/net/dsa.h                    |    6 +
 net/dsa/port.c                       |   32 +
 15 files changed, 1826 insertions(+), 1634 deletions(-)

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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