mlxsw: spectrum_router: Pass payload pointer to nexthop update function

Have the caller pass a pointer to the payload of the RATR register to
the function updating a single nexthop / adjacency entry.

In a subsequent patch, this will allow the caller to make sure
replacement was successful by querying the state of the adjacency entry
after replacement and comparing with the initial request.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlxsw/spectrum_dpipe.c

@@ -1178,6 +1178,7 @@ mlxsw_sp_dpipe_table_adj_entries_dump(void *priv, bool counters_enabled,
 
 static int mlxsw_sp_dpipe_table_adj_counters_update(void *priv, bool enable)
 {
+	char ratr_pl[MLXSW_REG_RATR_LEN];
 	struct mlxsw_sp *mlxsw_sp = priv;
 	struct mlxsw_sp_nexthop *nh;
 	u32 adj_hash_index = 0;
@@ -1197,7 +1198,7 @@ static int mlxsw_sp_dpipe_table_adj_counters_update(void *priv, bool enable)
 			mlxsw_sp_nexthop_counter_free(mlxsw_sp, nh);
 		mlxsw_sp_nexthop_eth_update(mlxsw_sp,
 					    adj_index + adj_hash_index, nh,
-					    true);
+					    true, ratr_pl);
 	}
 	return 0;
 }

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.c

@@ -128,11 +128,10 @@ bool mlxsw_sp_l3addr_is_zero(union mlxsw_sp_l3addr addr)
 static int
 mlxsw_sp_ipip_nexthop_update_gre4(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
 				  struct mlxsw_sp_ipip_entry *ipip_entry,
-				  bool force)
+				  bool force, char *ratr_pl)
 {
 	u16 rif_index = mlxsw_sp_ipip_lb_rif_index(ipip_entry->ol_lb);
 	__be32 daddr4 = mlxsw_sp_ipip_netdev_daddr4(ipip_entry->ol_dev);
-	char ratr_pl[MLXSW_REG_RATR_LEN];
 	enum mlxsw_reg_ratr_op op;
 
 	op = force ? MLXSW_REG_RATR_OP_WRITE_WRITE_ENTRY :

drivers/net/ethernet/mellanox/mlxsw/spectrum_ipip.h

@@ -41,7 +41,7 @@ struct mlxsw_sp_ipip_ops {
 
 	int (*nexthop_update)(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
 			      struct mlxsw_sp_ipip_entry *ipip_entry,
-			      bool force);
+			      bool force, char *ratr_pl);
 
 	bool (*can_offload)(const struct mlxsw_sp *mlxsw_sp,
 			    const struct net_device *ol_dev);

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c

@@ -3420,10 +3420,9 @@ static int mlxsw_sp_adj_index_mass_update(struct mlxsw_sp *mlxsw_sp,
 static int __mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp,
 					 u32 adj_index,
 					 struct mlxsw_sp_nexthop *nh,
-					 bool force)
+					 bool force, char *ratr_pl)
 {
 	struct mlxsw_sp_neigh_entry *neigh_entry = nh->neigh_entry;
-	char ratr_pl[MLXSW_REG_RATR_LEN];
 	enum mlxsw_reg_ratr_op op;
 	u16 rif_index;
 
@@ -3459,15 +3458,16 @@ static int __mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp,
 }
 
 int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
-				struct mlxsw_sp_nexthop *nh, bool force)
+				struct mlxsw_sp_nexthop *nh, bool force,
+				char *ratr_pl)
 {
 	int i;
 
 	for (i = 0; i < nh->num_adj_entries; i++) {
 		int err;
 
 		err = __mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index + i,
-						    nh, force);
+						    nh, force, ratr_pl);
 		if (err)
 			return err;
 	}
@@ -3478,26 +3478,27 @@ int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
 static int __mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
 					  u32 adj_index,
 					  struct mlxsw_sp_nexthop *nh,
-					  bool force)
+					  bool force, char *ratr_pl)
 {
 	const struct mlxsw_sp_ipip_ops *ipip_ops;
 
 	ipip_ops = mlxsw_sp->router->ipip_ops_arr[nh->ipip_entry->ipipt];
 	return ipip_ops->nexthop_update(mlxsw_sp, adj_index, nh->ipip_entry,
-					force);
+					force, ratr_pl);
 }
 
 static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
 					u32 adj_index,
-					struct mlxsw_sp_nexthop *nh, bool force)
+					struct mlxsw_sp_nexthop *nh, bool force,
+					char *ratr_pl)
 {
 	int i;
 
 	for (i = 0; i < nh->num_adj_entries; i++) {
 		int err;
 
 		err = __mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index + i,
-						     nh, force);
+						     nh, force, ratr_pl);
 		if (err)
 			return err;
 	}
@@ -3506,7 +3507,8 @@ static int mlxsw_sp_nexthop_ipip_update(struct mlxsw_sp *mlxsw_sp,
 }
 
 static int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
-				   struct mlxsw_sp_nexthop *nh, bool force)
+				   struct mlxsw_sp_nexthop *nh, bool force,
+				   char *ratr_pl)
 {
 	/* When action is discard or trap, the nexthop must be
 	 * programmed as an Ethernet nexthop.
@@ -3515,17 +3517,18 @@ static int mlxsw_sp_nexthop_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
 	    nh->action == MLXSW_SP_NEXTHOP_ACTION_DISCARD ||
 	    nh->action == MLXSW_SP_NEXTHOP_ACTION_TRAP)
 		return mlxsw_sp_nexthop_eth_update(mlxsw_sp, adj_index, nh,
-						   force);
+						   force, ratr_pl);
 	else
 		return mlxsw_sp_nexthop_ipip_update(mlxsw_sp, adj_index, nh,
-						    force);
+						    force, ratr_pl);
 }
 
 static int
 mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
 			      struct mlxsw_sp_nexthop_group_info *nhgi,
 			      bool reallocate)
 {
+	char ratr_pl[MLXSW_REG_RATR_LEN];
 	u32 adj_index = nhgi->adj_index; /* base */
 	struct mlxsw_sp_nexthop *nh;
 	int i;
@@ -3542,7 +3545,7 @@ mlxsw_sp_nexthop_group_update(struct mlxsw_sp *mlxsw_sp,
 			int err = 0;
 
 			err = mlxsw_sp_nexthop_update(mlxsw_sp, adj_index, nh,
-						      true);
+						      true, ratr_pl);
 			if (err)
 				return err;
 			nh->update = 0;

drivers/net/ethernet/mellanox/mlxsw/spectrum_router.h

@@ -209,7 +209,8 @@ bool mlxsw_sp_nexthop_group_has_ipip(struct mlxsw_sp_nexthop *nh);
 int mlxsw_sp_nexthop_counter_get(struct mlxsw_sp *mlxsw_sp,
 				 struct mlxsw_sp_nexthop *nh, u64 *p_counter);
 int mlxsw_sp_nexthop_eth_update(struct mlxsw_sp *mlxsw_sp, u32 adj_index,
-				struct mlxsw_sp_nexthop *nh, bool force);
+				struct mlxsw_sp_nexthop *nh, bool force,
+				char *ratr_pl);
 void mlxsw_sp_nexthop_counter_alloc(struct mlxsw_sp *mlxsw_sp,
 				    struct mlxsw_sp_nexthop *nh);
 void mlxsw_sp_nexthop_counter_free(struct mlxsw_sp *mlxsw_sp,