net/mlx5e: Add helper to get RQ WQE's head

Add helper which retrieves the RQ WQE's head. Use this helper in RX
reporter diagnose callback.
Signed-off-by: Aya Levin <ayal@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c

@@ -181,7 +181,6 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 						   struct devlink_fmsg *fmsg)
 {
 	struct mlx5e_priv *priv = rq->channel->priv;
-	struct mlx5e_params *params;
 	struct mlx5e_icosq *icosq;
 	u8 icosq_hw_state;
 	int wqes_sz;
@@ -189,7 +188,6 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 	u16 wq_head;
 	int err;
 
-	params = &priv->channels.params;
 	icosq = &rq->channel->icosq;
 	err = mlx5e_query_rq_state(priv->mdev, rq->rqn, &hw_state);
 	if (err)
@@ -200,8 +198,7 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 		return err;
 
 	wqes_sz = mlx5e_rqwq_get_cur_sz(rq);
-	wq_head = params->rq_wq_type == MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ ?
-		  rq->mpwqe.wq.head : mlx5_wq_cyc_get_head(&rq->wqe.wq);
+	wq_head = mlx5e_rqwq_get_head(rq);
 
 	err = devlink_fmsg_obj_nest_start(fmsg);
 	if (err)

drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h

@@ -304,6 +304,16 @@ static inline u32 mlx5e_rqwq_get_cur_sz(struct mlx5e_rq *rq)
 	}
 }
 
+static inline u16 mlx5e_rqwq_get_head(struct mlx5e_rq *rq)
+{
+	switch (rq->wq_type) {
+	case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
+		return mlx5_wq_ll_get_head(&rq->mpwqe.wq);
+	default:
+		return mlx5_wq_cyc_get_head(&rq->wqe.wq);
+	}
+}
+
 /* SW parser related functions */
 
 struct mlx5e_swp_spec {

drivers/net/ethernet/mellanox/mlx5/core/wq.h

@@ -290,4 +290,8 @@ static inline void mlx5_wq_ll_update_db_record(struct mlx5_wq_ll *wq)
 	*wq->db = cpu_to_be32(wq->wqe_ctr);
 }
 
+static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq)
+{
+	return wq->head;
+}
 #endif /* __MLX5_WQ_H__ */