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 seperate 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 (4):
net/ethtool: Add netlink interface for the PLCA RS
phylib: Add support for 10BASE-T1S link modes and PLCA config
drivers/net/phy: Add driver for the onsemi NCN26000 10BASE-T1S PHY
driver/ncn26000: add PLCA support
MAINTAINERS | 13 ++
drivers/net/phy/Kconfig | 7 +
drivers/net/phy/Makefile | 1 +
drivers/net/phy/ncn26000.c | 209 +++++++++++++++++++
drivers/net/phy/phy-c45.c | 187 +++++++++++++++++
drivers/net/phy/phy-core.c | 2 +-
drivers/net/phy/phy.c | 179 +++++++++++++++++
drivers/net/phy/phy_device.c | 3 +
drivers/net/phy/phylink.c | 6 +-
include/linux/ethtool.h | 11 +
include/linux/phy.h | 81 ++++++++
include/uapi/linux/ethtool.h | 3 +
include/uapi/linux/ethtool_netlink.h | 25 +++
include/uapi/linux/mdio.h | 31 +++
net/ethtool/Makefile | 2 +-
net/ethtool/common.c | 8 +
net/ethtool/netlink.c | 30 +++
net/ethtool/netlink.h | 6 +
net/ethtool/plca.c | 290 +++++++++++++++++++++++++++
19 files changed, 1091 insertions(+), 3 deletions(-)
create mode 100644 drivers/net/phy/ncn26000.c
create mode 100644 net/ethtool/plca.c
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2.35.1