net/mlx5e: XDP, Print the offending TX descriptor on error completion

Upon an error completion on an XDP SQ, print the offending WQE
to ease the debug process.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
index f9dad26..6f32a69 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c
@@ -408,7 +408,8 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
 
        i = 0;
        do {
-               u16 wqe_counter;
+               struct mlx5e_xdp_wqe_info *wi;
+               u16 wqe_counter, ci;
                bool last_wqe;
 
                mlx5_cqwq_pop(&cq->wq);
@@ -416,9 +417,6 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
                wqe_counter = be16_to_cpu(cqe->wqe_counter);
 
                do {
-                       struct mlx5e_xdp_wqe_info *wi;
-                       u16 ci;
-
                        last_wqe = (sqcc == wqe_counter);
                        ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc);
                        wi = &sq->db.wqe_info[ci];
@@ -434,6 +432,7 @@ bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
                                         get_cqe_opcode(cqe));
                        mlx5e_dump_error_cqe(&sq->cq, sq->sqn,
                                             (struct mlx5_err_cqe *)cqe);
+                       mlx5_wq_cyc_wqe_dump(&sq->wq, ci, wi->num_wqebbs);
                }
        } while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));