[PATCH net-next 4/4] net: mlx5: add xdp tx return bulking support

[Lorenzo Bianconi]

Convert mlx5 driver to xdp_return_frame_bulk APIs.

XDP_REDIRECT (upstream codepath): 8.5Mpps
XDP_REDIRECT (upstream codepath + bulking APIs): 10.1Mpps

Signed-off-by: Lorenzo Bianconi <lore...@kernel.org>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c 
b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index ae90d533a350..5fdfbf390d5c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -369,8 +369,10 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
                                  bool recycle)
 {
        struct mlx5e_xdp_info_fifo *xdpi_fifo = &sq->db.xdpi_fifo;
+       struct xdp_frame_bulk bq;
        u16 i;
 
+       bq.xa = NULL;
        for (i = 0; i < wi->num_pkts; i++) {
                struct mlx5e_xdp_info xdpi = mlx5e_xdpi_fifo_pop(xdpi_fifo);
 
@@ -379,7 +381,7 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
                        /* XDP_TX from the XSK RQ and XDP_REDIRECT */
                        dma_unmap_single(sq->pdev, xdpi.frame.dma_addr,
                                         xdpi.frame.xdpf->len, DMA_TO_DEVICE);
-                       xdp_return_frame(xdpi.frame.xdpf);
+                       xdp_return_frame_bulk(xdpi.frame.xdpf, &bq);
                        break;
                case MLX5E_XDP_XMIT_MODE_PAGE:
                        /* XDP_TX from the regular RQ */
@@ -393,6 +395,7 @@ static void mlx5e_free_xdpsq_desc(struct mlx5e_xdpsq *sq,
                        WARN_ON_ONCE(true);
                }
        }
+       xdp_flush_frame_bulk(&bq);
 }
 
 bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
-- 
2.26.2