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SubjectRe: [net-next 0/6] net: marvell: prestera: Add Switchdev driver for Prestera family ASIC device 98DX326x (AC3x)
On Thu, May 28, 2020 at 06:12:39PM +0300, Vadym Kochan 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 firmware image will be uploaded soon to the linux-firmware repository.
>
> PATCH:
> 1) Fixed W=1 warnings

Hi,

I just applied the patches for review and checkpatch had a lot of
complaints. Some are even ERRORs. For example:

WARNING: do not add new typedefs
#1064: FILE: drivers/net/ethernet/marvell/prestera/prestera_hw.h:32:
+typedef void (*prestera_event_cb_t)

WARNING: line over 80 characters
#2007: FILE: drivers/net/ethernet/marvell/prestera/prestera_rxtx.c:321:
+ __skb_trim(buf->skb, PRESTERA_SDMA_RX_DESC_PKT_LEN(desc));

WARNING: line over 80 characters
#2007: FILE: drivers/net/ethernet/marvell/prestera/prestera_rxtx.c:321:
+ __skb_trim(buf->skb, PRESTERA_SDMA_RX_DESC_PKT_LEN(desc));

ERROR: Macros with complex values should be enclosed in parentheses
#196: FILE: drivers/net/ethernet/marvell/prestera/prestera_pci.c:161:
+#define PRESTERA_FW_REG_ADDR(fw, reg) PRESTERA_FW_REG_BASE(fw) + (reg)

WARNING: prefer 'help' over '---help---' for new help texts
#52: FILE: drivers/net/ethernet/marvell/prestera/Kconfig:15:
+config PRESTERA_PCI

...

Also, smatch complaints about:

drivers/net/ethernet/marvell/prestera//prestera_ethtool.c:713
prestera_ethtool_get_strings() error: memcpy() '*prestera_cnt_name' too
small (32 vs 960)

And coccicheck about:

drivers/net/ethernet/marvell/prestera/prestera_hw.c:681:2-3: Unneeded
semicolon

>
> 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 | 111 ++
> .../marvell/prestera/prestera_devlink.h | 25 +
> .../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 | 1225 ++++++++++++++++
> .../ethernet/marvell/prestera/prestera_hw.h | 180 +++
> .../ethernet/marvell/prestera/prestera_main.c | 663 +++++++++
> .../ethernet/marvell/prestera/prestera_pci.c | 825 +++++++++++
> .../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, 6433 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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