eth: mpnic: count packets, bytes, and drops per ring

Keep packet, byte and drop counters on each Tx work, Tx completion, and
Rx completion queue. Report them to the core via the rtnl_link_stats64
interface.

Rx completion queues also count errors. Frames the device marked with an
uncorrectable error are counted as errors, and frames that fail for any
other reason are counted as drops.

All packets cleaned from the TWQ during mpnic_flush() are counted as
drops, though completions for some of them may have been DMA'd into
the completion ring between the time mpnic_poll() last ran and before
mpnic_wait_all_queues_idle() returns. This is done for code simplicity.

An RCU approach is used because ndo_get_stats64 is not called with the
instance lock.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://patch.msgid.link/20261012-mpnic-counters3-v2-1-8afba81c2d5a@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

0 files changed, 0 insertions, 0 deletions