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Message-ID: <cover.1768707226.git.daniel@makrotopia.org>
Date: Sun, 18 Jan 2026 03:44:54 +0000
From: Daniel Golle <daniel@...rotopia.org>
To: Daniel Golle <daniel@...rotopia.org>, Andrew Lunn <andrew@...n.ch>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
Simon Horman <horms@...nel.org>, netdev@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Frank Wunderlich <frankwu@....de>, Chad Monroe <chad@...roe.io>,
Cezary Wilmanski <cezary.wilmanski@...ran.com>,
Avinash Jayaraman <ajayaraman@...linear.com>,
Bing tao Xu <bxu@...linear.com>, Liang Xu <lxu@...linear.com>,
Juraj Povazanec <jpovazanec@...linear.com>,
"Fanni (Fang-Yi) Chan" <fchan@...linear.com>,
"Benny (Ying-Tsan) Weng" <yweng@...linear.com>,
"Livia M. Rosu" <lrosu@...linear.com>,
John Crispin <john@...ozen.org>
Subject: [PATCH v7 net-next 0/4] net: dsa: initial support for MaxLinear
MxL862xx switches
This series adds very basic DSA support for the MaxLinear MxL86252
(5 PHY ports) and MxL86282 (8 PHY ports) switches.
MxL862xx integrates a firmware running on an embedded processor (running
Zephyr RTOS). Host interaction uses a simple netlink-like API transported
over MDIO/MMD.
This series includes only what's needed to pass traffic between user
ports and the CPU port: relayed MDIO to internal PHYs, basic port
enable/disable, and CPU-port special tagging.
Follow up series will bring bridge, VLAN, ... offloading, and support
for using a 802.1Q-based special tag instead of the proprietary 8-byte
tag.
---
basic DSA selftests were run, results:
* no_forwarding.sh: all tests PASS
* bridge_vlan_unaware.sh: all tests PASS
* bridge_vlan_mcast.sh: all tests PASS
* bridge_vlan_aware.sh: all tests PASS
* local_termination.sh: all tests PASS or XFAIL, except for
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to unknown MAC address [FAIL]
reception succeeded, but should have failed
TEST: VLAN over vlan_filtering=1 bridged port: Unicast IPv4 to unknown MAC address, allmulti [FAIL]
reception succeeded, but should have failed
As obviously this is mostly testing the Linux software bridge at this point
I didn't bother to run any of the FDB or MDB related tests.
Changes since v6
1/4 dt-bindings: net: dsa: add MaxLinear MxL862xx
* no changes
2/4 net: dsa: add tag format for MxL862xx switches
* no changes
3/4 net: mdio: add unlocked mdiodev C45 bus accessors
* no changes
4/4 net: dsa: add basic initial driver for MxL862xx switches
* fix kerneldoc style
Changes since RFC v5
1/4 dt-bindings: net: dsa: add MaxLinear MxL862xx
* no changes
2/4 net: dsa: add tag format for MxL862xx switches
* remove unnecessary check for skb != NULL
* merge consecutively printed warnings into single dev_warn_ratelimited
3/4 net: mdio: add unlocked mdiodev C45 bus accessors
* no changes
4/4 net: dsa: add basic initial driver for MxL862xx switches
* include bridge and bridgeport API needed to isolate ports
* remove warning in .setup as ports are now isolated
* make ready-after-reset check more robust by adding delay
* sort structs in order of struct definitions
* best effort to sort functions without introducing additional prototypes
* always use enums with kerneldoc comments in mxl862xx-api.h
* remove bogus .phy_read and .phy_write DSA ops as the driver anyway registers
a user MDIO bus with Clause-22 and Clause-45 operations
* various small style fixes
Changes since RFC v4
1/4 dt-bindings: net: dsa: add MaxLinear MxL862xx
* no changes
2/4 net: dsa: add tag format for MxL862xx switches
* drop unused precompiler macros
3/4 net: mdio: add unlocked mdiodev C45 bus accessors
* fix indentation
4/4 net: dsa: add basic initial driver for MxL862xx switches
* output warning in .setup regarding unknown pre-configuration
* add comment explaining why CFGGET is used in reset function
Changes since RFC v3
1/4 dt-bindings: net: dsa: add MaxLinear MxL862xx
* remove labels from example
* remove 'bindings for' from commit title
2/4 net: dsa: add tag format for MxL862xx switches
* describe fields and variables with comments
* sub-interface is only 5 bits
* harmonize Kconfig symbol name
* maintain alphabetic order in Kconfig
* fix typo s/beginnig/beginning/
* fix typo s/swtiches/switches/
* arrange local variables in reverse xmas tree order
3/4 net: mdio: add unlocked mdiodev C45 bus accessors
* unchanged
4/4 net: dsa: add basic initial driver for MxL862xx switches
* poll switch readiness after reset
* implement driver shutdown
* added port_fast_aging API call and driver op
* unified port setup in new .port_setup op
* improve comment explaining special handlign for unaligned API read
* various typos and formatting improvements
Changes since RFC v2
1/4, 2/4, 3/4: unchanged
4/4 net: dsa: add basic initial driver for MxL862xx switches
* fix return value being uninitialized on error in mxl862xx_api_wrap()
* add missing description in kerneldoc comment of
struct mxl862xx_ss_sp_tag
Changes since initial RFC
1/4 dt-bindings: net: dsa: add bindings for MaxLinear MxL862xx
* better description in dt-bindings doc
2/4 net: dsa: add tag formats for MxL862xx switches
* make sure all tag fields are initialized
3/4 net: mdio: add unlocked mdiodev C45 bus accessors
* new patch
4/4 net: dsa: add basic initial driver for MxL862xx switches
* make use of struct mdio_device
* add phylink_mac_ops stubs
* drop leftover nonsense from mxl862xx_phylink_get_caps()
* fix endian conversions
* use __le32 instead of enum types in over-the-wire structs
* use existing MDIO_* macros whenever possible
* simplify API constants to be more readable
* use readx_poll_timeout instead of open-coding poll timeout loop
* add mxl862xx_reg_read() and mxl862xx_reg_write() helpers
* demystify error codes returned by the firmware
* add #defines for mxl862xx_ss_sp_tag member values
* move reset to dedicated function, clarify magic number being the
reset command ID
Daniel Golle (4):
dt-bindings: net: dsa: add MaxLinear MxL862xx
net: dsa: add tag format for MxL862xx switches
net: mdio: add unlocked mdiodev C45 bus accessors
net: dsa: add basic initial driver for MxL862xx switches
.../bindings/net/dsa/maxlinear,mxl862xx.yaml | 154 ++++++
MAINTAINERS | 8 +
drivers/net/dsa/Kconfig | 2 +
drivers/net/dsa/Makefile | 1 +
drivers/net/dsa/mxl862xx/Kconfig | 12 +
drivers/net/dsa/mxl862xx/Makefile | 3 +
drivers/net/dsa/mxl862xx/mxl862xx-api.h | 521 ++++++++++++++++++
drivers/net/dsa/mxl862xx/mxl862xx-cmd.h | 44 ++
drivers/net/dsa/mxl862xx/mxl862xx-host.c | 230 ++++++++
drivers/net/dsa/mxl862xx/mxl862xx-host.h | 5 +
drivers/net/dsa/mxl862xx/mxl862xx.c | 498 +++++++++++++++++
drivers/net/dsa/mxl862xx/mxl862xx.h | 25 +
include/linux/mdio.h | 13 +
include/net/dsa.h | 2 +
net/dsa/Kconfig | 7 +
net/dsa/Makefile | 1 +
net/dsa/tag_mxl862xx.c | 112 ++++
17 files changed, 1638 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/dsa/maxlinear,mxl862xx.yaml
create mode 100644 drivers/net/dsa/mxl862xx/Kconfig
create mode 100644 drivers/net/dsa/mxl862xx/Makefile
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx-api.h
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx-cmd.h
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx-host.c
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx-host.h
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx.c
create mode 100644 drivers/net/dsa/mxl862xx/mxl862xx.h
create mode 100644 net/dsa/tag_mxl862xx.c
--
2.52.0
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