[PATCH v2 net-next 0/5] add PLCA RS support and onsemi NCN26000

Piergiorgio Beruto
2023-01-06T18:44:10Z

This patchset adds support for getting/setting the Physical Layer
Collision Avoidace (PLCA) Reconciliation Sublayer (RS) configuration and
status on Ethernet PHYs that supports it.

PLCA is a feature that provides improved media-access performance in terms
of throughput, latency and fairness for multi-drop (P2MP) half-duplex PHYs.
PLCA is defined in Clause 148 of the IEEE802.3 specifications as amended
by 802.3cg-2019. Currently, PLCA is supported by the 10BASE-T1S single-pair
Ethernet PHY defined in the same standard and related amendments. The OPEN
Alliance SIG TC14 defines additional specifications for the 10BASE-T1S PHY,
including a standard register map for PHYs that embeds the PLCA RS (see
PLCA management registers at https://www.opensig.org/about/specifications/).

The changes proposed herein add the appropriate ethtool netlink interface
for configuring the PLCA RS on PHYs that supports it. A separate patchset
further modifies the ethtool userspace program to show and modify the
configuration/status of the PLCA RS.

Additionally, this patchset adds support for the onsemi NCN26000
Industrial Ethernet 10BASE-T1S PHY that uses the newly added PLCA
infrastructure.

Piergiorgio Beruto (5):
net/ethtool: add netlink interface for the PLCA RS
drivers/net/phy: add the link modes for the 10BASE-T1S Ethernet PHY
drivers/net/phy: add connection between ethtool and phylib for PLCA
drivers/net/phy: add helpers to get/set PLCA configuration
drivers/net/phy: add driver for the onsemi NCN26000 10BASE-T1S PHY

Documentation/networking/ethtool-netlink.rst | 138 +++++++++
MAINTAINERS | 14 +
drivers/net/phy/Kconfig | 7 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/mdio-open-alliance.h | 46 +++
drivers/net/phy/ncn26000.c | 173 ++++++++++++
drivers/net/phy/phy-c45.c | 183 ++++++++++++
drivers/net/phy/phy-core.c | 5 +-
drivers/net/phy/phy.c | 174 ++++++++++++
drivers/net/phy/phy_device.c | 17 ++
drivers/net/phy/phylink.c | 6 +-
include/linux/ethtool.h | 12 +
include/linux/phy.h | 84 ++++++
include/uapi/linux/ethtool.h | 3 +
include/uapi/linux/ethtool_netlink.h | 25 ++
net/ethtool/Makefile | 2 +-
net/ethtool/common.c | 8 +
net/ethtool/netlink.c | 29 ++
net/ethtool/netlink.h | 6 +
net/ethtool/plca.c | 277 +++++++++++++++++++
20 files changed, 1207 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/phy/mdio-open-alliance.h
create mode 100644 drivers/net/phy/ncn26000.c
create mode 100644 net/ethtool/plca.c

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2.37.4