From: Aya Levin <ayal@mellanox.com>
Date: Thu, 30 Apr 2020 14:41:13 +0300
Subject: net/mlx5e: Add helper to get the RQ WQE counter
Patch-mainline: v5.9-rc1
Git-commit: de6c6ab7e8c6431d67d1a87477fee2cfc0fa0845
References: jsc#SLE-15172

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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c |    6 ++++++
 drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h        |   10 ++++++++++
 drivers/net/ethernet/mellanox/mlx5/core/wq.h             |   11 +++++++++++
 3 files changed, 27 insertions(+)

--- a/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/reporter_rx.c
@@ -183,6 +183,7 @@ static int mlx5e_rx_reporter_build_diagn
 	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_diagn
 
 	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_diagn
 	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;
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -314,6 +314,16 @@ static inline u16 mlx5e_rqwq_get_head(st
 	}
 }
 
+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 {
--- a/drivers/net/ethernet/mellanox/mlx5/core/wq.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/wq.h
@@ -172,6 +172,11 @@ static inline int mlx5_wq_cyc_cc_bigger(
 	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(st
 {
 	return wq->head;
 }
+
+static inline u16 mlx5_wq_ll_get_counter(struct mlx5_wq_ll *wq)
+{
+	return wq->wqe_ctr;
+}
+
 #endif /* __MLX5_WQ_H__ */