net/mlx5e: Add helper to get the RQ WQE counter

Add a helper which retrieves the RQ's WQE counter. Use this helper in
the RX reporter diagnose callback.

$ devlink health diagnose pci/0000:00:0b.0 reporter rx
Common config:
  RQ:
     type: 2 stride size: 2048 size: 8
     CQ:
      stride size: 64 size: 1024
RQs:
   channel ix: 0 rqn: 2113 HW state: 1 SW state: 5 WQE counter: 7 posted WQEs: 7 cc: 7 ICOSQ HW state: 1
   CQ:
    cqn: 1032 HW status: 0
   channel ix: 1 rqn: 2118 HW state: 1 SW state: 5 WQE counter: 7 posted WQEs: 7 cc: 7 ICOSQ HW state: 1
   CQ:
    cqn: 1036 HW status: 0
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

@@ -183,6 +183,7 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 	struct mlx5e_priv *priv = rq->channel->priv;
 	struct mlx5e_icosq *icosq;
 	u8 icosq_hw_state;
+	u16 wqe_counter;
 	int wqes_sz;
 	u8 hw_state;
 	u16 wq_head;
@@ -199,6 +200,7 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 
 	wqes_sz = mlx5e_rqwq_get_cur_sz(rq);
 	wq_head = mlx5e_rqwq_get_head(rq);
+	wqe_counter = mlx5e_rqwq_get_wqe_counter(rq);
 
 	err = devlink_fmsg_obj_nest_start(fmsg);
 	if (err)
@@ -220,6 +222,10 @@ static int mlx5e_rx_reporter_build_diagnose_output(struct mlx5e_rq *rq,
 	if (err)
 		return err;
 
+	err = devlink_fmsg_u32_pair_put(fmsg, "WQE counter", wqe_counter);
+	if (err)
+		return err;
+
 	err = devlink_fmsg_u32_pair_put(fmsg, "posted WQEs", wqes_sz);
 	if (err)
 		return err;

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

@@ -314,6 +314,16 @@ static inline u16 mlx5e_rqwq_get_head(struct mlx5e_rq *rq)
 	}
 }
 
+static inline u16 mlx5e_rqwq_get_wqe_counter(struct mlx5e_rq *rq)
+{
+	switch (rq->wq_type) {
+	case MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ:
+		return mlx5_wq_ll_get_counter(&rq->mpwqe.wq);
+	default:
+		return mlx5_wq_cyc_get_counter(&rq->wqe.wq);
+	}
+}
+
 /* SW parser related functions */
 
 struct mlx5e_swp_spec {

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

@@ -172,6 +172,11 @@ static inline int mlx5_wq_cyc_cc_bigger(u16 cc1, u16 cc2)
 	return !equal && !smaller;
 }
 
+static inline u16 mlx5_wq_cyc_get_counter(struct mlx5_wq_cyc *wq)
+{
+	return wq->wqe_ctr;
+}
+
 static inline u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)
 {
 	return wq->fbc.sz_m1 + 1;
@@ -294,4 +299,10 @@ static inline u16 mlx5_wq_ll_get_head(struct mlx5_wq_ll *wq)
 {
 	return wq->head;
 }
+
+static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq)
+{
+	return wq->wqe_ctr;
+}
+
 #endif /* __MLX5_WQ_H__ */