netdev - [PATCH net-next 06/10] mlxsw: reg: Add Router Adjacency Table Activity Dump Register

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Date:   Wed, 24 Mar 2021 22:14:20 +0200
From:   Ido Schimmel <idosch@...sch.org>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...dia.com,
        petrm@...dia.com, dsahern@...il.com, mlxsw@...dia.com,
        Ido Schimmel <idosch@...dia.com>
Subject: [PATCH net-next 06/10] mlxsw: reg: Add Router Adjacency Table Activity Dump Register

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

The RATRAD register is used to dump and optionally clear activity bits
of router adjacency table entries. Will be used by the next patch to
query and clear the activity of nexthop buckets in a resilient nexthop
group.

Signed-off-by: Ido Schimmel <idosch@...dia.com>
Reviewed-by: Petr Machata <petrm@...dia.com>
---
 drivers/net/ethernet/mellanox/mlxsw/reg.h | 55 +++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/reg.h b/drivers/net/ethernet/mellanox/mlxsw/reg.h
index d33c79ad1810..900b4bf5bb5b 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/reg.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/reg.h
@@ -8130,6 +8130,60 @@ mlxsw_reg_rtdp_ipip4_pack(char *payload, u16 irif,
 	mlxsw_reg_rtdp_ipip_expected_gre_key_set(payload, expected_gre_key);
 }
 
+/* RATRAD - Router Adjacency Table Activity Dump Register
+ * ------------------------------------------------------
+ * The RATRAD register is used to dump and optionally clear activity bits of
+ * router adjacency table entries.
+ */
+#define MLXSW_REG_RATRAD_ID 0x8022
+#define MLXSW_REG_RATRAD_LEN 0x210
+
+MLXSW_REG_DEFINE(ratrad, MLXSW_REG_RATRAD_ID, MLXSW_REG_RATRAD_LEN);
+
+enum {
+	/* Read activity */
+	MLXSW_REG_RATRAD_OP_READ_ACTIVITY,
+	/* Read and clear activity */
+	MLXSW_REG_RATRAD_OP_READ_CLEAR_ACTIVITY,
+};
+
+/* reg_ratrad_op
+ * Access: Operation
+ */
+MLXSW_ITEM32(reg, ratrad, op, 0x00, 30, 2);
+
+/* reg_ratrad_ecmp_size
+ * ecmp_size is the amount of sequential entries from adjacency_index. Valid
+ * ranges:
+ * Spectrum-1: 32-64, 512, 1024, 2048, 4096
+ * Spectrum-2/3: 32-128, 256, 512, 1024, 2048, 4096
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, ratrad, ecmp_size, 0x00, 0, 13);
+
+/* reg_ratrad_adjacency_index
+ * Index into the adjacency table.
+ * Access: Index
+ */
+MLXSW_ITEM32(reg, ratrad, adjacency_index, 0x04, 0, 24);
+
+/* reg_ratrad_activity_vector
+ * Activity bit per adjacency index.
+ * Bits higher than ecmp_size are reserved.
+ * Access: RO
+ */
+MLXSW_ITEM_BIT_ARRAY(reg, ratrad, activity_vector, 0x10, 0x200, 1);
+
+static inline void mlxsw_reg_ratrad_pack(char *payload, u32 adjacency_index,
+					 u16 ecmp_size)
+{
+	MLXSW_REG_ZERO(ratrad, payload);
+	mlxsw_reg_ratrad_op_set(payload,
+				MLXSW_REG_RATRAD_OP_READ_CLEAR_ACTIVITY);
+	mlxsw_reg_ratrad_ecmp_size_set(payload, ecmp_size);
+	mlxsw_reg_ratrad_adjacency_index_set(payload, adjacency_index);
+}
+
 /* RIGR-V2 - Router Interface Group Register Version 2
  * ---------------------------------------------------
  * The RIGR_V2 register is used to add, remove and query egress interface list
@@ -12114,6 +12168,7 @@ static const struct mlxsw_reg_info *mlxsw_reg_infos[] = {
 	MLXSW_REG(rtar),
 	MLXSW_REG(ratr),
 	MLXSW_REG(rtdp),
+	MLXSW_REG(ratrad),
 	MLXSW_REG(rdpm),
 	MLXSW_REG(ricnt),
 	MLXSW_REG(rrcr),
-- 
2.30.2