netdev - [RFC PATCH net-next 4/6] mlxsw: reg: Add Tunneling NVE Counters Register

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Date:   Mon, 17 Aug 2020 15:50:57 +0300
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        amcohen@...dia.com, danieller@...dia.com, mlxsw@...dia.com,
        roopa@...dia.com, dsahern@...il.com, andrew@...n.ch,
        f.fainelli@...il.com, vivien.didelot@...il.com, saeedm@...dia.com,
        tariqt@...dia.com, ayal@...dia.com, eranbe@...dia.com,
        mkubecek@...e.cz, Ido Schimmel <idosch@...dia.com>
Subject: [RFC PATCH net-next 4/6] mlxsw: reg: Add Tunneling NVE Counters Register

From: Ido Schimmel <idosch@...dia.com>

The TNCR register exposes counters of NVE encapsulation and
decapsulation on Spectrum-1.

Signed-off-by: Amit Cohen <amcohen@...dia.com>
Signed-off-by: Danielle Ratson <danieller@...dia.com>
Signed-off-by: Ido Schimmel <idosch@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 51 +++++++++++++++++++++++
 1 file changed, 51 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index 079b080de7f7..9f19127caf83 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -10070,6 +10070,56 @@ static inline void mlxsw_reg_tngcr_pack(char *payload,
 	mlxsw_reg_tngcr_nve_group_size_flood_set(payload, 1);
 }
 
+/* TNCR - Tunneling NVE Counters Register
+ * --------------------------------------
+ * The TNCR register exposes counters of NVE encapsulation and decapsulation.
+ *
+ * Note: Not supported by Spectrum-2 onwards.
+ */
+#define MLXSW_REG_TNCR_ID 0xA002
+#define MLXSW_REG_TNCR_LEN 0x30
+
+MLXSW_REG_DEFINE(tncr, MLXSW_REG_TNCR_ID, MLXSW_REG_TNCR_LEN);
+
+/* reg_tncr_clear_counters
+ * Clear counters.
+ * Access: OP
+ */
+MLXSW_ITEM32(reg, tncr, clear_counters, 0x00, 31, 1);
+
+/* reg_tncr_count_encap
+ * Count number of packets which did encapsulation to an NVE tunnel.
+ * Access: RO
+ *
+ * Note: Multicast packets which are encapsulated multiple times are counted
+ * multiple times.
+ */
+MLXSW_ITEM64(reg, tncr, count_encap, 0x10, 0, 64);
+
+/* reg_tncr_count_decap
+ * Count number of packets which did decapsulation from an NVE tunnel.
+ * Access: RO
+ */
+MLXSW_ITEM64(reg, tncr, count_decap, 0x18, 0, 64);
+
+/* reg_tncr_count_decap_errors
+ * Count number of packets which had decapsulation errors from an NVE tunnel.
+ * Access: RO
+ */
+MLXSW_ITEM64(reg, tncr, count_decap_errors, 0x20, 0, 64);
+
+/* reg_tncr_count_decap_discards
+ * Count number of packets which had decapsulation discards from an NVE tunnel.
+ * Access: RO
+ */
+MLXSW_ITEM64(reg, tncr, count_decap_discards, 0x28, 0, 64);
+
+static inline void mlxsw_reg_tncr_pack(char *payload, bool clear_counters)
+{
+	MLXSW_REG_ZERO(tncr, payload);
+	mlxsw_reg_tncr_clear_counters_set(payload, clear_counters);
+}
+
 /* TNUMT - Tunneling NVE Underlay Multicast Table Register
  * -------------------------------------------------------
  * The TNUMT register is for building the underlay MC table. It is used
@@ -11001,6 +11051,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(mtptpt),
 	MLXSW_REG(mgpir),
 	MLXSW_REG(tngcr),
+	MLXSW_REG(tncr),
 	MLXSW_REG(tnumt),
 	MLXSW_REG(tnqcr),
 	MLXSW_REG(tnqdr),
-- 
2.26.2