Date:   Fri, 24 Jul 2020 16:58:36 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Vadym Kochan <vadym.kochan@...ision.eu>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        Ido Schimmel <idosch@...lanox.com>,
        Andrew Lunn <andrew@...n.ch>,
        Oleksandr Mazur <oleksandr.mazur@...ision.eu>,
        Serhiy Boiko <serhiy.boiko@...ision.eu>,
        Serhiy Pshyk <serhiy.pshyk@...ision.eu>,
        Volodymyr Mytnyk <volodymyr.mytnyk@...ision.eu>,
        Taras Chornyi <taras.chornyi@...ision.eu>,
        Andrii Savka <andrii.savka@...ision.eu>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mickey Rachamim <mickeyr@...vell.com>
Subject: Re: [net-next v2 0/6] net: marvell: prestera: Add Switchdev driver
 for Prestera family ASIC device 98DX326x (AC3x)

Fri, Jul 24, 2020 at 04:19:51PM CEST, vadym.kochan@...ision.eu wrote:
>Marvell Prestera 98DX326x integrates up to 24 ports of 1GbE with 8
>ports of 10GbE uplinks or 2 ports of 40Gbps stacking for a largely
>wireless SMB deployment.
>
>Prestera Switchdev is a firmware based driver that operates via PCI bus.  The
>current implementation supports only boards designed for the Marvell Switchdev
>solution and requires special firmware.
>
>This driver implementation includes only L1, basic L2 support, and RX/TX.
>
>The core Prestera switching logic is implemented in prestera_main.c, there is
>an intermediate hw layer between core logic and firmware. It is
>implemented in prestera_hw.c, the purpose of it is to encapsulate hw
>related logic, in future there is a plan to support more devices with
>different HW related configurations.
>
>The following Switchdev features are supported:
>
>    - VLAN-aware bridge offloading
>    - VLAN-unaware bridge offloading
>    - FDB offloading (learning, ageing)
>    - Switchport configuration
>
>The original firmware image is uploaded to the linux-firmware repository.
>
>PATCHv2:
>    1) Use devlink_port_type_clear()
>
>    2) Add _MS prefix to timeout defines.
>
>    3) Remove not-needed packed attribute from the firmware ipc structs,
>       also the firmware image needs to be uploaded too (will do it soon).
>
>    4) Introduce prestera_hw_switch_fini(), to be mirrored with init and
>       do simple validation if the event handlers are unregistered.
>
>    5) Use kfree_rcu() for event handler unregistering.
>
>    6) Get rid of rcu-list usage when dealing with ports, not needed for
>       now.
>
>    7) Little spelling corrections in the error/info messages.
>
>    8) Make pci probe & remove logic mirrored.
>
>    9) Get rid of ETH_FCS_LEN in headroom setting, not needed.

Note it is much more convenient for the reviewer to see the changelog
per-patch. Could you please do it if there's going to be v3? Thanks!


>
>PATCH:
>    1) Fixed W=1 warnings
>
>    2) Renamed PCI driver name to be more generic "Prestera DX" because
>       there will be more devices supported.
>
>    3) Changed firmware image dir path: marvell/ -> mrvl/prestera/
>       to be aligned with location in linux-firmware.git (if such
>       will be accepted).
>
>RFC v3:
>    1) Fix prestera prefix in prestera_rxtx.c
>
>    2) Protect concurrent access from multiple ports on multiple CPU system
>       on tx path by spinlock in prestera_rxtx.c
>
>    3) Try to get base mac address from device-tree, otherwise use a random generated one.
>
>    4) Move ethtool interface support into separate prestera_ethtool.c file.
>
>    5) Add basic devlink support and get rid of physical port naming ops.
>
>    6) Add STP support in Switchdev driver.
>
>    7) Removed MODULE_AUTHOR
>
>    8) Renamed prestera.c -> prestera_main.c, and kernel module to
>       prestera.ko
>
>RFC v2:
>    1) Use "pestera_" prefix in struct's and functions instead of mvsw_pr_
>
>    2) Original series split into additional patches for Switchdev ethtool support.
>
>    3) Use major and minor firmware version numbers in the firmware image filename.
>
>    4) Removed not needed prints.
>
>    5) Use iopoll API for waiting on register's value in prestera_pci.c
>
>    6) Use standart approach for describing PCI ID matching section instead of using
>       custom wrappers in prestera_pci.c
>
>    7) Add RX/TX support in prestera_rxtx.c.
>
>    8) Rewritten prestera_switchdev.c with following changes:
>       - handle netdev events from prestera.c
>
>       - use struct prestera_bridge for bridge objects, and get rid of
>         struct prestera_bridge_device which may confuse.
>
>       - use refcount_t
>
>    9) Get rid of macro usage for sending fw requests in prestera_hw.c
>
>    10) Add base_mac setting as module parameter. base_mac is required for
>        generation default port's mac.
>
>Vadym Kochan (6):
>  net: marvell: prestera: Add driver for Prestera family ASIC devices
>  net: marvell: prestera: Add PCI interface support
>  net: marvell: prestera: Add basic devlink support
>  net: marvell: prestera: Add ethtool interface support
>  net: marvell: prestera: Add Switchdev driver implementation
>  dt-bindings: marvell,prestera: Add description for device-tree
>    bindings
>
> .../bindings/net/marvell,prestera.txt         |   34 +
> drivers/net/ethernet/marvell/Kconfig          |    1 +
> drivers/net/ethernet/marvell/Makefile         |    1 +
> drivers/net/ethernet/marvell/prestera/Kconfig |   25 +
> .../net/ethernet/marvell/prestera/Makefile    |    7 +
> .../net/ethernet/marvell/prestera/prestera.h  |  208 +++
> .../marvell/prestera/prestera_devlink.c       |  120 ++
> .../marvell/prestera/prestera_devlink.h       |   26 +
> .../ethernet/marvell/prestera/prestera_dsa.c  |  134 ++
> .../ethernet/marvell/prestera/prestera_dsa.h  |   37 +
> .../marvell/prestera/prestera_ethtool.c       |  737 ++++++++++
> .../marvell/prestera/prestera_ethtool.h       |   37 +
> .../ethernet/marvell/prestera/prestera_hw.c   | 1231 ++++++++++++++++
> .../ethernet/marvell/prestera/prestera_hw.h   |  181 +++
> .../ethernet/marvell/prestera/prestera_main.c |  653 +++++++++
> .../ethernet/marvell/prestera/prestera_pci.c  |  823 +++++++++++
> .../ethernet/marvell/prestera/prestera_rxtx.c |  860 +++++++++++
> .../ethernet/marvell/prestera/prestera_rxtx.h |   21 +
> .../marvell/prestera/prestera_switchdev.c     | 1286 +++++++++++++++++
> .../marvell/prestera/prestera_switchdev.h     |   16 +
> 20 files changed, 6438 insertions(+)
> create mode 100644 drivers/net/ethernet/marvell/prestera/Kconfig
> create mode 100644 drivers/net/ethernet/marvell/prestera/Makefile
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_devlink.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_devlink.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_dsa.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_dsa.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_ethtool.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_ethtool.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_hw.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_hw.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_main.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_pci.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_rxtx.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_rxtx.h
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_switchdev.c
> create mode 100644 drivers/net/ethernet/marvell/prestera/prestera_switchdev.h
>
>-- 
>2.17.1
>

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