WCN7850: REO soft_reorder_enable support and destination ring

[강충안]

Hi all,

I am investigating REO behavior on WCN7850 hw2.0 with 5+6 GHz MLO,
using a mainline-based kernel with experimental ath12k changes.

When enabling soft_reorder_enable for TID 0 through
UPDATE_RX_REO_QUEUE, the command reports SUCCESS, but downlink UDP
reception stops after the first few packets. Reception works normally
with the flag disabled.

Firmware: WLAN.HMT.1.1.c7-00108-QCAHMTSWPL_V1.0_V2.0_SILICONZ_UPSTREAM-3

Is this mode supported on WCN7850? If so, which destination ring and
RX descriptor format does it use, and is additional host or firmware
configuration required?

We would like to deliver valid RX packets without REO sequence-gap
waiting. A reference implementation or alternative supported mode
would be helpful.

Thanks,

Matt Chiang
Seoul National University