mainlining shenanigans
a47ab26b9e
Grygorii Strashko says: ==================== net: ethernet: ti: add networking support for k3 am65x/j721e soc This v6 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 v6: - fixed comments from Rob Herring <robh@kernel.org> and added his Reviewed-by. - added Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com> 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@ti.com> - 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@ti.com> Changes in v4: - fixed minor comments from Jakub Kicinski <kuba@kernel.org> - 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@kernel.org> Changes in v2: - fixed DT yaml definition - fixed comments from David Miller v5: https://patchwork.ozlabs.org/cover/1258295/ 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 ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.