tree 95b7a54b57c0185cb579dbe10502be78dadd015d
parent d156576362c07e954dc36e07b0d7b0733a010f7d
author Florian Fainelli <f.fainelli@gmail.com> 1507744671 -0700
committer David S. Miller <davem@davemloft.net> 1507835402 -0700

net: dsa: bcm_sf2: Turn on ACB at the switch level

Turn on the out of band Advanced Congestion Buffering (ACB) mechanism at
the switch level now that we have properly established the queue mapping
between the switch egress queues and the SYSTEMPORT egress queues. This
allows the switch to correctly backpressure the host system when one of
its queue drops below the configured thresholds.

This is also helping achieve so called "lossless" behavior by adapting
the TX interrupt pacing to the actual speed and capacity of the switch
port.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>