sfc: Add XDP frame size

This driver uses RX page-split when possible. It was recently fixed
in commit 86e85bf6981c ("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: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/158945335278.97035.14611425333184621652.stgit@firesoul

diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 260352d..68c47a8 100644 (file)
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -308,6 +308,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel,
        xdp_set_data_meta_invalid(&xdp);
        xdp.data_end = xdp.data + rx_buf->len;
        xdp.rxq = &rx_queue->xdp_rxq_info;
+       xdp.frame_sz = efx->rx_page_buf_step;
 
        xdp_act = bpf_prog_run_xdp(xdp_prog, &xdp);
        rcu_read_unlock();