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Message-Id: <20210113084255.22675-1-tobias@waldekranz.com>
Date: Wed, 13 Jan 2021 09:42:50 +0100
From: Tobias Waldekranz <tobias@...dekranz.com>
To: davem@...emloft.net, kuba@...nel.org
Cc: andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
olteanv@...il.com, j.vosburgh@...il.com, vfalico@...il.com,
andy@...yhouse.net, netdev@...r.kernel.org
Subject: [PATCH v5 net-next 0/5] net: dsa: Link aggregation support
Start of by adding an extra notification when adding a port to a bond,
this allows static LAGs to be offloaded using the bonding driver.
Then add the generic support required to offload link aggregates to
drivers built on top of the DSA subsystem.
Finally, implement offloading for the mv88e6xxx driver, i.e. Marvell's
LinkStreet family.
Supported LAG implementations:
- Bonding
- Team
Supported modes:
- Isolated. The LAG may be used as a regular interface outside of any
bridge.
- Bridged. The LAG may be added to a bridge, in which case switching
is offloaded between the LAG and any other switch ports. I.e. the
LAG behaves just like a port from this perspective.
In bridged mode, the following is supported:
- STP filtering.
- VLAN filtering.
- Multicast filtering. The bridge correctly snoops IGMP and configures
the proper groups if snooping is enabled. Static groups can also be
configured. MLD seems to work, but has not been extensively tested.
- Unicast filtering. Automatic learning works. Static entries are
_not_ supported. This will be added in a later series as it requires
some more general refactoring in mv88e6xxx before I can test it.
v4 -> v5:
- Cleanup PVT configuration for LAGed ports in mv88e6xxx (Vladimir)
- Document dsa_lag_{map,unmap} (Vladimir)
v3 -> v4:
- Remove `struct dsa_lag`, leaving only a linear mapping to/from
ID/netdev that drivers can opt-in to.
- Always fallback to a software LAG if offloading is not possible.
- mv88e6xxx: Do not offload unless the LAG mode matches what the
hardware can do (hash based balancing).
v2 -> v3:
- Skip unnecessary RCU protection of the LAG device pointer, as
suggested by Vladimir.
- Refcount LAGs with a plain refcount_t instead of `struct kref`, as
suggested by Vladimir.
v1 -> v2:
- Allocate LAGs from a static pool to avoid late errors under memory
pressure, as suggested by Andrew.
RFC -> v1:
- Properly propagate MDB operations.
- Support for bonding in addition to team.
- Fixed a locking bug in mv88e6xxx.
- Make sure ports are disabled-by-default in mv88e6xxx.
- Support for both DSA and EDSA tagging.
Tobias Waldekranz (5):
net: bonding: Notify ports about their initial state
net: dsa: Don't offload port attributes on standalone ports
net: dsa: Link aggregation support
net: dsa: mv88e6xxx: Link aggregation support
net: dsa: tag_dsa: Support reception of packets from LAG devices
drivers/net/bonding/bond_main.c | 2 +
drivers/net/dsa/mv88e6xxx/chip.c | 296 +++++++++++++++++++++++++++-
drivers/net/dsa/mv88e6xxx/global2.c | 8 +-
drivers/net/dsa/mv88e6xxx/global2.h | 5 +
drivers/net/dsa/mv88e6xxx/port.c | 21 ++
drivers/net/dsa/mv88e6xxx/port.h | 5 +
include/net/dsa.h | 60 ++++++
net/dsa/dsa.c | 12 +-
net/dsa/dsa2.c | 93 +++++++++
net/dsa/dsa_priv.h | 36 ++++
net/dsa/port.c | 79 ++++++++
net/dsa/slave.c | 71 ++++++-
net/dsa/switch.c | 50 +++++
net/dsa/tag_dsa.c | 17 +-
14 files changed, 742 insertions(+), 13 deletions(-)
--
2.17.1
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