sfc: Add XDP frame size
This driver uses RX page-split when possible. It was recently fixed in commit 86e85bf6 ("sfc: fix XDP-redirect in this driver") to add needed tailroom for XDP-redirect. After the fix efx->rx_page_buf_step is the frame size, with enough head and tail-room for XDP-redirect. Signed-off-by: NJesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: NAlexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/158945335278.97035.14611425333184621652.stgit@firesoul
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