From: Jiri Pirko <jiri@mellanox.com>
Date: Sun, 8 Jul 2018 10:00:20 +0300
Subject: mlxsw: core_acl_flex_actions: Allow the first set to be dummy
Patch-mainline: v4.19-rc1
Git-commit: 5b9488fd5f1e007d22543e68cc95eb41c91f8018
References: bsc#1112374

In Spectrum-2, the real action sets are always in KVD linear. The first
set is always empty and contains only pointer to the first real set in
KVD linear. So provide possibility to specify the first set is the dummy
one.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c |   17 +++++++++++-
 drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h |    1 
 2 files changed, 17 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.c
@@ -355,9 +355,24 @@ struct mlxsw_afa_block *mlxsw_afa_block_
 	block->first_set = mlxsw_afa_set_create(true);
 	if (!block->first_set)
 		goto err_first_set_create;
-	block->cur_set = block->first_set;
+
+	/* In case user instructs to have dummy first set, we leave it
+	 * empty here and create another, real, set right away.
+	 */
+	if (mlxsw_afa->ops->dummy_first_set) {
+		block->cur_set = mlxsw_afa_set_create(false);
+		if (!block->cur_set)
+			goto err_second_set_create;
+		block->cur_set->prev = block->first_set;
+		block->first_set->next = block->cur_set;
+	} else {
+		block->cur_set = block->first_set;
+	}
+
 	return block;
 
+err_second_set_create:
+	mlxsw_afa_set_destroy(block->first_set);
 err_first_set_create:
 	kfree(block);
 	return NULL;
--- a/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_acl_flex_actions.h
@@ -54,6 +54,7 @@ struct mlxsw_afa_ops {
 			  bool ingress, int *p_span_id);
 	void (*mirror_del)(void *priv, u8 local_in_port, int span_id,
 			   bool ingress);
+	bool dummy_first_set;
 };
 
 struct mlxsw_afa *mlxsw_afa_create(unsigned int max_acts_per_set,