mlxsw: spectrum_trap: Store all trap group data in one array

Use one array to store all the information about all the trap groups
instead of hard coding it in code. This will be used in future patches
to disable certain functionality (e.g., policer binding) on a trap group
basis.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -17,6 +17,13 @@ struct mlxsw_sp_trap_policer_item {
 	u16 hw_id;
 };
 
+struct mlxsw_sp_trap_group_item {
+	struct devlink_trap_group group;
+	u16 hw_group_id;
+	u8 priority;
+	u8 tc;
+};
+
 /* All driver-specific traps must be documented in
  * Documentation/networking/devlink/mlxsw.rst
  */
@@ -188,11 +195,31 @@ mlxsw_sp_trap_policer_items_arr[] = {
 	},
 };
 
-static const struct devlink_trap_group mlxsw_sp_trap_groups_arr[] = {
-	DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 1),
-	DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
-	DEVLINK_TRAP_GROUP_GENERIC(TUNNEL_DROPS, 1),
-	DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 1),
+static const struct mlxsw_sp_trap_group_item mlxsw_sp_trap_group_items_arr[] = {
+	{
+		.group = DEVLINK_TRAP_GROUP_GENERIC(L2_DROPS, 1),
+		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS,
+		.priority = 0,
+		.tc = 1,
+	},
+	{
+		.group = DEVLINK_TRAP_GROUP_GENERIC(L3_DROPS, 1),
+		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS,
+		.priority = 0,
+		.tc = 1,
+	},
+	{
+		.group = DEVLINK_TRAP_GROUP_GENERIC(TUNNEL_DROPS, 1),
+		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS,
+		.priority = 0,
+		.tc = 1,
+	},
+	{
+		.group = DEVLINK_TRAP_GROUP_GENERIC(ACL_DROPS, 1),
+		.hw_group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_ACL_DISCARDS,
+		.priority = 0,
+		.tc = 1,
+	},
 };
 
 static const struct devlink_trap mlxsw_sp_traps_arr[] = {
@@ -332,6 +359,20 @@ mlxsw_sp_trap_policer_item_lookup(struct mlxsw_sp *mlxsw_sp, u32 id)
 	return NULL;
 }
 
+static struct mlxsw_sp_trap_group_item *
+mlxsw_sp_trap_group_item_lookup(struct mlxsw_sp *mlxsw_sp, u16 id)
+{
+	struct mlxsw_sp_trap *trap = mlxsw_sp->trap;
+	int i;
+
+	for (i = 0; i < trap->groups_count; i++) {
+		if (trap->group_items_arr[i].group.id == id)
+			return &trap->group_items_arr[i];
+	}
+
+	return NULL;
+}
+
 static int mlxsw_sp_trap_cpu_policers_set(struct mlxsw_sp *mlxsw_sp)
 {
 	char qpcr_pl[MLXSW_REG_QPCR_LEN];
@@ -452,9 +493,57 @@ static void mlxsw_sp_trap_policers_fini(struct mlxsw_sp *mlxsw_sp)
 	mlxsw_sp_trap_policer_items_arr_fini(mlxsw_sp);
 }
 
+static int mlxsw_sp_trap_groups_init(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+	const struct mlxsw_sp_trap_group_item *group_item;
+	struct mlxsw_sp_trap *trap = mlxsw_sp->trap;
+	int err, i;
+
+	trap->group_items_arr = kmemdup(mlxsw_sp_trap_group_items_arr,
+					sizeof(mlxsw_sp_trap_group_items_arr),
+					GFP_KERNEL);
+	if (!trap->group_items_arr)
+		return -ENOMEM;
+
+	trap->groups_count = ARRAY_SIZE(mlxsw_sp_trap_group_items_arr);
+
+	for (i = 0; i < trap->groups_count; i++) {
+		group_item = &trap->group_items_arr[i];
+		err = devlink_trap_groups_register(devlink, &group_item->group,
+						   1);
+		if (err)
+			goto err_trap_group_register;
+	}
+
+	return 0;
+
+err_trap_group_register:
+	for (i--; i >= 0; i--) {
+		group_item = &trap->group_items_arr[i];
+		devlink_trap_groups_unregister(devlink, &group_item->group, 1);
+	}
+	kfree(trap->group_items_arr);
+	return err;
+}
+
+static void mlxsw_sp_trap_groups_fini(struct mlxsw_sp *mlxsw_sp)
+{
+	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
+	struct mlxsw_sp_trap *trap = mlxsw_sp->trap;
+	int i;
+
+	for (i = trap->groups_count - 1; i >= 0; i--) {
+		const struct mlxsw_sp_trap_group_item *group_item;
+
+		group_item = &trap->group_items_arr[i];
+		devlink_trap_groups_unregister(devlink, &group_item->group, 1);
+	}
+	kfree(trap->group_items_arr);
+}
+
 int mlxsw_sp_devlink_traps_init(struct mlxsw_sp *mlxsw_sp)
 {
-	size_t groups_count = ARRAY_SIZE(mlxsw_sp_trap_groups_arr);
 	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
 	int err;
 
@@ -474,10 +563,9 @@ int mlxsw_sp_devlink_traps_init(struct mlxsw_sp *mlxsw_sp)
 	if (err)
 		return err;
 
-	err = devlink_trap_groups_register(devlink, mlxsw_sp_trap_groups_arr,
-					   groups_count);
+	err = mlxsw_sp_trap_groups_init(mlxsw_sp);
 	if (err)
-		goto err_trap_groups_register;
+		goto err_trap_groups_init;
 
 	err = devlink_traps_register(devlink, mlxsw_sp_traps_arr,
 				     ARRAY_SIZE(mlxsw_sp_traps_arr), mlxsw_sp);
@@ -487,22 +575,19 @@ int mlxsw_sp_devlink_traps_init(struct mlxsw_sp *mlxsw_sp)
 	return 0;
 
 err_traps_register:
-	devlink_trap_groups_unregister(devlink, mlxsw_sp_trap_groups_arr,
-				       groups_count);
-err_trap_groups_register:
+	mlxsw_sp_trap_groups_fini(mlxsw_sp);
+err_trap_groups_init:
 	mlxsw_sp_trap_policers_fini(mlxsw_sp);
 	return err;
 }
 
 void mlxsw_sp_devlink_traps_fini(struct mlxsw_sp *mlxsw_sp)
 {
-	size_t groups_count = ARRAY_SIZE(mlxsw_sp_trap_groups_arr);
 	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
 
 	devlink_traps_unregister(devlink, mlxsw_sp_traps_arr,
 				 ARRAY_SIZE(mlxsw_sp_traps_arr));
-	devlink_trap_groups_unregister(devlink, mlxsw_sp_trap_groups_arr,
-				       groups_count);
+	mlxsw_sp_trap_groups_fini(mlxsw_sp);
 	mlxsw_sp_trap_policers_fini(mlxsw_sp);
 }
 
@@ -582,33 +667,12 @@ __mlxsw_sp_trap_group_init(struct mlxsw_core *mlxsw_core,
 {
 	struct mlxsw_sp *mlxsw_sp = mlxsw_core_driver_priv(mlxsw_core);
 	u16 hw_policer_id = MLXSW_REG_HTGT_INVALID_POLICER;
+	const struct mlxsw_sp_trap_group_item *group_item;
 	char htgt_pl[MLXSW_REG_HTGT_LEN];
-	u8 priority, tc, group_id;
-
-	switch (group->id) {
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_L2_DROPS:
-		group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L2_DISCARDS;
-		priority = 0;
-		tc = 1;
-		break;
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_L3_DROPS:
-		group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_L3_DISCARDS;
-		priority = 0;
-		tc = 1;
-		break;
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_TUNNEL_DROPS:
-		group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_TUNNEL_DISCARDS;
-		priority = 0;
-		tc = 1;
-		break;
-	case DEVLINK_TRAP_GROUP_GENERIC_ID_ACL_DROPS:
-		group_id = MLXSW_REG_HTGT_TRAP_GROUP_SP_ACL_DISCARDS;
-		priority = 0;
-		tc = 1;
-		break;
-	default:
+
+	group_item = mlxsw_sp_trap_group_item_lookup(mlxsw_sp, group->id);
+	if (WARN_ON(!group_item))
 		return -EINVAL;
-	}
 
 	if (policer_id) {
 		struct mlxsw_sp_trap_policer_item *policer_item;
@@ -620,7 +684,8 @@ __mlxsw_sp_trap_group_init(struct mlxsw_core *mlxsw_core,
 		hw_policer_id = policer_item->hw_id;
 	}
 
-	mlxsw_reg_htgt_pack(htgt_pl, group_id, hw_policer_id, priority, tc);
+	mlxsw_reg_htgt_pack(htgt_pl, group_item->hw_group_id, hw_policer_id,
+			    group_item->priority, group_item->tc);
 	return mlxsw_reg_write(mlxsw_core, MLXSW_REG(htgt), htgt_pl);
 }
 

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

@@ -10,6 +10,10 @@
 struct mlxsw_sp_trap {
 	struct mlxsw_sp_trap_policer_item *policer_items_arr;
 	u64 policers_count; /* Number of registered policers */
+
+	struct mlxsw_sp_trap_group_item *group_items_arr;
+	u64 groups_count; /* Number of registered groups */
+
 	u64 max_policers;
 	unsigned long policers_usage[]; /* Usage bitmap */
 };