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Date: Mon, 25 Mar 2019 09:31:42 -0700
From: Florian Fainelli <f.fainelli@...il.com>
To: Vladimir Oltean <olteanv@...il.com>, davem@...emloft.net,
netdev@...r.kernel.org
Cc: andrew@...n.ch, vivien.didelot@...il.com, linus.walleij@...aro.org
Subject: Re: [RFC PATCH net-next 00/13] NXP SJA1105 DSA driver
On 3/23/19 8:23 PM, Vladimir Oltean wrote:
> This patchset adds a DSA driver for the SPI-managed NXP SJA1105 driver.
> Due to the hardware's unfriendliness, most of its state needs to be
> shadowed in kernel memory by the driver. To support this and keep a
> decent amount of cleanliness in the code, a new generic API for
> converting between CPU-accessible ("unpacked") structures and
> hardware-accessible ("packed") structures is proposed and used.
>
> Then several small modifications are done to the DSA core, like changing
> the order of two calls during initialization, or permitting driver
> access to the dp->vlan_filtering property.
>
> These small modifications are done for the greater goal of adding
> support for 802.1Q pseudo-switch tagging. The limitations of this type
> of tagging are discussed in the commit that adds it, and in the code
> comments.
>
> The SJA1105 driver then proceeds to extend this 8021q switch tagging
> protocol while adding its own (tag_sja1105). This is done because
> SJA1105 needs SPI intervention during transmission of link-local
> traffic, which cannot be done from the xmit handler but requires a
> deferred worker thread.
>
> The driver is GPL-2.0 licensed. The source code files which are licensed
> as BSD-3-Clause are hardware support files and derivative of the
> userspace NXP sja1105-tool program, which is BSD-3-Clause licensed.
>
> TODO items:
> * Add full support for the P/Q/R/S series. The patches were mostly
> tested on a first-generation T device.
> * Add timestamping support and PTP clock manipulation.
> * Figure out what the current state of tc-taprio hw offload is, and
> attempt to configure the switch's time-aware scheduler using that.
Overall this is a very clean and impressive piece of work, especially
given the constraints you have to work with, I will follow-up with
comments in individual patches thanks Vladimir!
>
> Vladimir Oltean (13):
> lib: Add support for generic packing operations
> net: dsa: Store vlan_filtering as a property of dsa_port
> net: dsa: Create a more convenient function for installing port VLANs
> net: dsa: Call driver's setup callback after setting up its switchdev
> notifier
> net: dsa: Optional VLAN-based port separation for switches without
> tagging
> net: dsa: Introduce driver for NXP SJA1105 5-port L2 switch
> net: dsa: sja1105: Add support for FDB and MDB management
> net: dsa: sja1105: Add support for VLAN operations
> net: dsa: sja1105: Add support for ethtool port counters
> net: dsa: sja1105: Add support for traffic through standalone ports
> net: dsa: sja1105: Add support for Spanning Tree Protocol
> Documentation: networking: dsa: Add details about NXP SJA1105 driver
> dt-bindings: net: dsa: Add documentation for NXP SJA1105 driver
>
> .../devicetree/bindings/net/dsa/sja1105.txt | 123 ++
> Documentation/networking/dsa/sja1105.txt | 83 +
> Documentation/packing.txt | 150 ++
> MAINTAINERS | 14 +
> drivers/net/dsa/Kconfig | 2 +
> drivers/net/dsa/Makefile | 1 +
> drivers/net/dsa/sja1105/Kconfig | 17 +
> drivers/net/dsa/sja1105/Makefile | 10 +
> drivers/net/dsa/sja1105/sja1105.h | 148 ++
> drivers/net/dsa/sja1105/sja1105_clocking.c | 677 ++++++
> .../net/dsa/sja1105/sja1105_dynamic_config.c | 607 ++++++
> .../net/dsa/sja1105/sja1105_dynamic_config.h | 40 +
> drivers/net/dsa/sja1105/sja1105_ethtool.c | 420 ++++
> drivers/net/dsa/sja1105/sja1105_main.c | 1580 ++++++++++++++
> drivers/net/dsa/sja1105/sja1105_spi.c | 667 ++++++
> .../net/dsa/sja1105/sja1105_static_config.c | 1810 +++++++++++++++++
> .../net/dsa/sja1105/sja1105_static_config.h | 500 +++++
> include/linux/dsa/sja1105.h | 52 +
> include/linux/packing.h | 49 +
> include/net/dsa.h | 6 +
> lib/Makefile | 2 +-
> lib/packing.c | 211 ++
> net/dsa/Kconfig | 12 +
> net/dsa/Makefile | 2 +
> net/dsa/dsa.c | 6 +
> net/dsa/dsa2.c | 8 +-
> net/dsa/dsa_priv.h | 15 +
> net/dsa/port.c | 36 +-
> net/dsa/slave.c | 16 +-
> net/dsa/tag_8021q.c | 185 ++
> net/dsa/tag_sja1105.c | 142 ++
> 31 files changed, 7568 insertions(+), 23 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/net/dsa/sja1105.txt
> create mode 100644 Documentation/networking/dsa/sja1105.txt
> create mode 100644 Documentation/packing.txt
> create mode 100644 drivers/net/dsa/sja1105/Kconfig
> create mode 100644 drivers/net/dsa/sja1105/Makefile
> create mode 100644 drivers/net/dsa/sja1105/sja1105.h
> create mode 100644 drivers/net/dsa/sja1105/sja1105_clocking.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_dynamic_config.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_dynamic_config.h
> create mode 100644 drivers/net/dsa/sja1105/sja1105_ethtool.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_main.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_spi.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_static_config.c
> create mode 100644 drivers/net/dsa/sja1105/sja1105_static_config.h
> create mode 100644 include/linux/dsa/sja1105.h
> create mode 100644 include/linux/packing.h
> create mode 100644 lib/packing.c
> create mode 100644 net/dsa/tag_8021q.c
> create mode 100644 net/dsa/tag_sja1105.c
>
--
Florian
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