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Date:   Tue, 17 Mar 2020 09:27:28 +0200
From:   Grygorii Strashko <>
To:     Rob Herring <>,
        Kishon Vijay Abraham I <>,
        Tero Kristo <>,
        "David S . Miller" <>,
        netdev <>, Roger Quadros <>,
        <>, Jakub Kicinski <>
CC:     Murali Karicheri <>,
        Sekhar Nori <>,
        Peter Ujfalusi <>,
        Grygorii Strashko <>
Subject: [PATCH net-next v4 00/11] net: ethernet: ti: add networking support for k3 am65x/j721e soc


This v4 series adds basic networking support support TI K3 AM654x/J721E SoC which
have integrated Gigabit Ethernet MAC (Media Access Controller) into device MCU
domain and named MCU_CPSW0 (CPSW2G NUSS).

Formally TRMs refer CPSW2G NUSS as two-port Gigabit Ethernet Switch subsystem
with port 0 being the CPPI DMA host port and port 1 being the external Ethernet
port, but for 1 external port device it's just Port 0 <-> ALE <-> Port 1 and it's
rather device with HW filtering capabilities then actually switching device.
It's expected to have similar devices, but with more external ports.

The new Host port 0 Communications Port Programming Interface (CPPI5) is
operating by TI AM654x/J721E NAVSS Unified DMA Peripheral Root Complex (UDMA-P)
controller [1].

The CPSW2G contains below modules for which existing code is re-used:
 - MAC SL: cpsw_sl.c
 - Address Lookup Engine (ALE): cpsw_ale.c, basically compatible with K2 66AK2E/G
 - Management Data Input/Output interface (MDIO): davinci_mdio.c, fully 
   compatible with TI AM3/4/5 devices

Basic features supported by CPSW2G NUSS driver:
 - VLAN support, 802.1Q compliant, Auto add port VLAN for untagged frames on
   ingress, Auto VLAN removal on egress and auto pad to minimum frame size.
 - multicast filtering
 - promisc mode
 - TX multiq support in Round Robin or Fixed priority modes
 - RX checksum offload for non-fragmented IPv4/IPv6 TCP/UDP packets
 - TX checksum offload support for IPv4/IPv6 TCP/UDP packets (J721E only).

Features under development:
 - Support for IEEE 1588 Clock Synchronization. The CPSW2G NUSS includes new
   version of Common Platform Time Sync (CPTS)
 - tc-mqprio: priority level Quality Of Service (QOS) support (802.1p)
 - tc-cbs: Support for Audio/Video Bridging (P802.1Qav/D6.0) HW shapers
 - tc-taprio: IEEE 802.1Qbv/D2.2 Enhancements for Scheduled Traffic
 - frame preemption: IEEE P902.3br/D2.0 Interspersing Express Traffic, 802.1Qbu
 - extended ALE features: classifier/policers, auto-aging

Patches 1-6 are intended for netdev, Patches 7-11 are intended for K3 Platform
tree and provided here for testing purposes.

Changes in v4:
 - fixed minor comments from Jakub Kicinski <>
 - dependencies resolved: required phy-rmii-sel changes [2] queued for merge
   except one [3] which is included in this series with Kishon's ask.

Changes in v3:
 - add ARM64 defconfig changes for testing purposes
 - fixed DT yaml definition
 - fixed comments from Jakub Kicinski <>

Changes in v2:
 - fixed DT yaml definition
 - fixed comments from David Miller



Preliminary documentation can be found at:


Grygorii Strashko (11):
  phy: ti: gmii-sel: simplify config dependencies between net drivers
    and gmii phy
  net: ethernet: ti: ale: fix seeing unreg mcast packets with promisc
    and allmulti disabled
  net: ethernet: ti: ale: add support for mac-only mode
  net: ethernet: ti: ale: am65: add support for default thread cfg
  dt-binding: ti: am65x: document mcu cpsw nuss
  net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver
  arm64: dts: ti: k3-am65-mcu: add cpsw nuss node
  arm64: dts: k3-am654-base-board: add mcu cpsw nuss pinmux and phy defs
  arm64: dts: ti: k3-j721e-mcu: add mcu cpsw nuss node
  arm64: dts: ti: k3-j721e-common-proc-board: add mcu cpsw nuss pinmux
    and phy defs
  arm64: defconfig: ti: k3: enable dma and networking

 .../bindings/net/ti,k3-am654-cpsw-nuss.yaml   |  226 ++
 arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi       |   49 +
 arch/arm64/boot/dts/ti/k3-am65.dtsi           |    1 +
 .../arm64/boot/dts/ti/k3-am654-base-board.dts |   42 +
 .../dts/ti/k3-j721e-common-proc-board.dts     |   43 +
 .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi      |   49 +
 arch/arm64/boot/dts/ti/k3-j721e.dtsi          |    1 +
 arch/arm64/configs/defconfig                  |    3 +
 drivers/net/ethernet/ti/Kconfig               |   20 +-
 drivers/net/ethernet/ti/Makefile              |    3 +
 drivers/net/ethernet/ti/am65-cpsw-ethtool.c   |  747 +++++++
 drivers/net/ethernet/ti/am65-cpsw-nuss.c      | 1965 +++++++++++++++++
 drivers/net/ethernet/ti/am65-cpsw-nuss.h      |  143 ++
 drivers/net/ethernet/ti/cpsw_ale.c            |   38 +
 drivers/net/ethernet/ti/cpsw_ale.h            |    4 +
 drivers/net/ethernet/ti/k3-udma-desc-pool.c   |  126 ++
 drivers/net/ethernet/ti/k3-udma-desc-pool.h   |   30 +
 drivers/phy/ti/Kconfig                        |    3 -
 18 files changed, 3488 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/net/ti,k3-am654-cpsw-nuss.yaml
 create mode 100644 drivers/net/ethernet/ti/am65-cpsw-ethtool.c
 create mode 100644 drivers/net/ethernet/ti/am65-cpsw-nuss.c
 create mode 100644 drivers/net/ethernet/ti/am65-cpsw-nuss.h
 create mode 100644 drivers/net/ethernet/ti/k3-udma-desc-pool.c
 create mode 100644 drivers/net/ethernet/ti/k3-udma-desc-pool.h


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