mlxsw: spectrum_trap: Allow for per-ASIC trap groups initialization

Subsequent patches will need to register different trap groups for
Spectrum-1 and Spectrum-2 onwards.

Enable that by invoking a per-ASIC operation during trap groups
initialization.

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

1 files changed, 80 insertions, 9 deletions

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
index 47bc11a861cc..3726be5c02b4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_trap.c
@@ -1159,6 +1159,43 @@ 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_group_items_arr_init(struct mlxsw_sp *mlxsw_sp)
+{
+	size_t common_groups_count = ARRAY_SIZE(mlxsw_sp_trap_group_items_arr);
+	const struct mlxsw_sp_trap_group_item *spec_group_items_arr;
+	size_t elem_size = sizeof(struct mlxsw_sp_trap_group_item);
+	struct mlxsw_sp_trap *trap = mlxsw_sp->trap;
+	size_t groups_count, spec_groups_count;
+	int err;
+
+	err = mlxsw_sp->trap_ops->groups_init(mlxsw_sp, &spec_group_items_arr,
+					      &spec_groups_count);
+	if (err)
+		return err;
+
+	/* The group items array is created by concatenating the common trap
+	 * group items and the ASIC-specific trap group items.
+	 */
+	groups_count = common_groups_count + spec_groups_count;
+	trap->group_items_arr = kcalloc(groups_count, elem_size, GFP_KERNEL);
+	if (!trap->group_items_arr)
+		return -ENOMEM;
+
+	memcpy(trap->group_items_arr, mlxsw_sp_trap_group_items_arr,
+	       elem_size * common_groups_count);
+	memcpy(trap->group_items_arr + common_groups_count,
+	       spec_group_items_arr, elem_size * spec_groups_count);
+
+	trap->groups_count = groups_count;
+
+	return 0;
+}
+
+static void mlxsw_sp_trap_group_items_arr_fini(struct mlxsw_sp *mlxsw_sp)
+{
+	kfree(mlxsw_sp->trap->group_items_arr);
+}
+
 static int mlxsw_sp_trap_groups_init(struct mlxsw_sp *mlxsw_sp)
 {
 	struct devlink *devlink = priv_to_devlink(mlxsw_sp->core);
@@ -1166,13 +1203,9 @@ static int mlxsw_sp_trap_groups_init(struct mlxsw_sp *mlxsw_sp)
 	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);
+	err = mlxsw_sp_trap_group_items_arr_init(mlxsw_sp);
+	if (err)
+		return err;
 
 	for (i = 0; i < trap->groups_count; i++) {
 		group_item = &trap->group_items_arr[i];
@@ -1189,7 +1222,7 @@ err_trap_group_register:
 		group_item = &trap->group_items_arr[i];
 		devlink_trap_groups_unregister(devlink, &group_item->group, 1);
 	}
-	kfree(trap->group_items_arr);
+	mlxsw_sp_trap_group_items_arr_fini(mlxsw_sp);
 	return err;
 }
 
@@ -1205,7 +1238,7 @@ static void mlxsw_sp_trap_groups_fini(struct mlxsw_sp *mlxsw_sp)
 		group_item = &trap->group_items_arr[i];
 		devlink_trap_groups_unregister(devlink, &group_item->group, 1);
 	}
-	kfree(trap->group_items_arr);
+	mlxsw_sp_trap_group_items_arr_fini(mlxsw_sp);
 }
 
 static bool
@@ -1579,3 +1612,41 @@ mlxsw_sp_trap_policer_counter_get(struct mlxsw_core *mlxsw_core,
 
 	return 0;
 }
+
+static const struct mlxsw_sp_trap_group_item
+mlxsw_sp1_trap_group_items_arr[] = {
+};
+
+static int
+mlxsw_sp1_trap_groups_init(struct mlxsw_sp *mlxsw_sp,
+			   const struct mlxsw_sp_trap_group_item **arr,
+			   size_t *p_groups_count)
+{
+	*arr = mlxsw_sp1_trap_group_items_arr;
+	*p_groups_count = ARRAY_SIZE(mlxsw_sp1_trap_group_items_arr);
+
+	return 0;
+}
+
+const struct mlxsw_sp_trap_ops mlxsw_sp1_trap_ops = {
+	.groups_init = mlxsw_sp1_trap_groups_init,
+};
+
+static const struct mlxsw_sp_trap_group_item
+mlxsw_sp2_trap_group_items_arr[] = {
+};
+
+static int
+mlxsw_sp2_trap_groups_init(struct mlxsw_sp *mlxsw_sp,
+			   const struct mlxsw_sp_trap_group_item **arr,
+			   size_t *p_groups_count)
+{
+	*arr = mlxsw_sp2_trap_group_items_arr;
+	*p_groups_count = ARRAY_SIZE(mlxsw_sp2_trap_group_items_arr);
+
+	return 0;
+}
+
+const struct mlxsw_sp_trap_ops mlxsw_sp2_trap_ops = {
+	.groups_init = mlxsw_sp2_trap_groups_init,
+};