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cxgbe(4): Read the MPS buffer group map from the firmware as it could be

Description

cxgbe(4): Read the MPS buffer group map from the firmware as it could be
different from hardware defaults. The congestion channel map, which is
still fixed, needs to be tracked separately now. Change the congestion
setting for TOE rx queues to match the drivers on other OSes while here.

MFC after: 2 weeks
Sponsored by: Chelsio Communications

Details

Provenance
npAuthored on
Parents
rS324944: Treat a 'current' value of 0 as unlimited as a failsfe.
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