Re: [PATCH net-next v5 00/11] net: ethernet: ti: add networking support for k3 am65x/j721e soc

[Peter Ujfalusi]

Hi Grygorii,

On 19/03/2020 18.27, Grygorii Strashko wrote:
> Hi
> 
> This v5 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.

Needed to pick two patches:
arm64: dts: ti: k3-j721e-mcu: add scm node and phy-gmii-sel nodes
arm64: dts: ti: k3-am65-mcu: add phy-gmii-sel node

With those applied, NFS rootfs is working on top of linux-next, pretty cool!

Tested-by: Peter Ujfalusi <peter.ujfalusi@xxxxxx>

> Changes in v5:
>  - renamed files k3-udma-desc-pool.*  k3-udma-desc-pool to k3-cppi-desc-pool.*,
>    and API to k3_cppi_desc_pool_* as requested by Peter Ujfalusi <peter.ujfalusi@xxxxxx>
>  - fixed copy-paste err in am65_cpsw_nuss_ndo_slave_set_rx_mode() which blocked
>    recieving of mcast frames.
>  - added Tested-by: Murali Karicheri <m-karicheri2@xxxxxx> 
> 
> Changes in v4:
>  - fixed minor comments from Jakub Kicinski <kuba@xxxxxxxxxx>
>  - 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 <kuba@xxxxxxxxxx>
> 
> Changes in v2:
>  - fixed DT yaml definition
>  - fixed comments from David Miller
> 
> v4: https://patchwork.ozlabs.org/cover/1256092/
> v3: https://patchwork.ozlabs.org/cover/1254568/
> v2: https://patchwork.ozlabs.org/cover/1250674/
> v1: https://lwn.net/Articles/813087/
> 
> TRMs:
>  AM654: http://www.ti.com/lit/ug/spruid7e/spruid7e.pdf
>  J721E: http://www.ti.com/lit/ug/spruil1a/spruil1a.pdf
> 
> Preliminary documentation can be found at:
>  http://software-dl.ti.com/processor-sdk-linux/esd/docs/latest/linux/Foundational_Components/Kernel/Kernel_Drivers/Network/K3_CPSW2g.html
> 
> [1] https://lwn.net/Articles/808030/
> [2] https://lkml.org/lkml/2020/2/22/100
> [3] https://lkml.org/lkml/2020/3/3/724
> 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      |  142 ++
>  drivers/net/ethernet/ti/cpsw_ale.c            |   38 +
>  drivers/net/ethernet/ti/cpsw_ale.h            |    4 +
>  drivers/net/ethernet/ti/k3-cppi-desc-pool.c   |  126 ++
>  drivers/net/ethernet/ti/k3-cppi-desc-pool.h   |   30 +
>  drivers/phy/ti/Kconfig                        |    3 -
>  18 files changed, 3487 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-cppi-desc-pool.c
>  create mode 100644 drivers/net/ethernet/ti/k3-cppi-desc-pool.h
> 

- PÃter

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