net: airoha: better handle MIBs for GDM ports with multiple devs attached

Browse source

In the context of a GDM port that can have multiple net_devices attached
(GDM3 and GDM4), the HW counters (MIBs) are global for the GDM port.
This cause duplicated stats reported to the kernel for the related
net_device.
The SoC supports a split MIB feature where each counter is tracked based
on the relevant HW channel (NBQ) to account for this scenario and
provide a way to select the related counter on accessing the MIB
registers.
Enable this feature for GDM3 and GDM4 and configure the relevant HW
channel before updating the HW stats to report correct HW counter to the
kernel for the related interface.
Move the stats struct from port to dev since HW counter are now specific
to the network device instead of the GDM port. Refactor
airoha_update_hw_stats() to take airoha_eth and airoha_gdm_port
parameters since the function operates on the entire port.

Co-developed-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260611-airoha-eth-multi-serdes-stats-v1-1-42442ae42064@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Lorenzo Bianconi 2026-06-11 12:43:00 +02:00 • committed by Jakub Kicinski

parent b693b51e08

commit 8f4695fb67

2 changed files with 112 additions and 86 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

191

drivers/net/ethernet/airoha/airoha_eth.c

View file

7

drivers/net/ethernet/airoha/airoha_eth.h

View file