[PATCH net-next 00/17] NXP SJA1105 DSA driver

From: Vladimir Oltean
Date: Sun Mar 31 2019 - 13:42:55 EST

This patchset adds a DSA driver for the SPI-managed NXP SJA1105 switch.
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

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.
* Rework link state callbacks to use phylink once the SGMII port
is supported.

Changes from RFC:
* Removed the packing code for the static configuration tables that were
not currently used
* Removed the code for unpacking a static configuration structure from
a memory buffer (not used)
* Completely removed the SGMII stubs, since the configuration is not
complete anyway.
* Moved some code from the SJA1105 introduction commit into the patch
that used it.
* Made the code for checking global VLAN filtering generic and made b53
driver use it.
* Made mt7530 driver use the new generic dp->vlan_filtering
* Fixed check for stringset in .get_sset_count
* Minor cleanup in sja1105_clocking.c
* Fixed a confusing typo in DSA

RFC can be found at:

Vladimir Oltean (17):
lib: Add support for generic packing operations
net: dsa: Fix pharse -> phase typo
net: dsa: Store vlan_filtering as a property of dsa_port
net: dsa: mt7530: Use vlan_filtering property from dsa_port
net: dsa: Add more convenient functions for installing port VLANs
net: dsa: Call driver's setup callback after setting up its switchdev
net: dsa: Optional VLAN-based port separation for switches without
net: dsa: Be aware of switches where VLAN filtering is a global
net: dsa: b53: Let DSA handle mismatched VLAN filtering settings
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 ++
drivers/net/dsa/Kconfig | 2 +
drivers/net/dsa/Makefile | 1 +
drivers/net/dsa/b53/b53_common.c | 25 +-
drivers/net/dsa/mt7530.c | 14 +-
drivers/net/dsa/mt7530.h | 1 -
drivers/net/dsa/sja1105/Kconfig | 17 +
drivers/net/dsa/sja1105/Makefile | 10 +
drivers/net/dsa/sja1105/sja1105.h | 150 ++
drivers/net/dsa/sja1105/sja1105_clocking.c | 643 +++++++
.../net/dsa/sja1105/sja1105_dynamic_config.c | 518 ++++++
.../net/dsa/sja1105/sja1105_dynamic_config.h | 40 +
drivers/net/dsa/sja1105/sja1105_ethtool.c | 423 +++++
drivers/net/dsa/sja1105/sja1105_main.c | 1547 +++++++++++++++++
drivers/net/dsa/sja1105/sja1105_spi.c | 665 +++++++
.../net/dsa/sja1105/sja1105_static_config.c | 1074 ++++++++++++
.../net/dsa/sja1105/sja1105_static_config.h | 311 ++++
include/linux/dsa/sja1105.h | 52 +
include/linux/packing.h | 49 +
include/net/dsa.h | 11 +
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 | 75 +-
net/dsa/slave.c | 16 +-
net/dsa/switch.c | 3 +-
net/dsa/tag_8021q.c | 193 ++
net/dsa/tag_sja1105.c | 142 ++
35 files changed, 6556 insertions(+), 52 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