Looking through some old posts on e1000 I found that one can detect if DCA
is enabled with ethregs. Are these registers per queue? Here, the X520 is
configured with a single queue and the highest bits are set only for
DCA_RXCTRL[000].
On X520
DCA_RXCTRL[000] 1f0002a0
DCA_RXCTRL[001] 00001200
etc
DCA_TXCTRL[000] 1f002220
DCA_TXCTRL[001] 00002200
etc - 0's all the way down
(second port, same card)
DCA_RXCTRL[000] 1f0002a0
DCA_RXCTRL[001] 00001200
Also zeros all the way on highest bits.
There are no registers with DCA in name for X710 - what should I look for
instead?
BTW, how is DCA different from DDIO?
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