linux-imx

dpaa2-eth: Enable Rx PFC

Instruct the hardware to respond to received PFC frames.

Current firmware doesn't allow us to selectively enable PFC
on the Rx side for some priorities only, so we will react to
all incoming PFC frames (and stop transmitting on the traffic
classes specified in the frame).

PFC depends on the PAUSE flag also being set in link options.
Don't set it implicitly when user configures PFC, but issue
a warning if the two settings are not in sync.

For the Tx side, setting the PFC_PAUSE flag in the link options
is necessary but not sufficient, so PFC frame generation is
not enabled yet.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>