netdev - [PATCH net-next ct-offload 08/13] net/mlx5: E-Switch, Support getting chain mapping

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Message-Id: <1583422468-8456-9-git-send-email-paulb@mellanox.com>
Date:   Thu,  5 Mar 2020 17:34:23 +0200
From:   Paul Blakey <paulb@...lanox.com>
To:     Paul Blakey <paulb@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Oz Shlomo <ozsh@...lanox.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Vlad Buslov <vladbu@...lanox.com>,
        David Miller <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...lanox.com>, Roi Dayan <roid@...lanox.com>
Subject: [PATCH net-next ct-offload 08/13] net/mlx5: E-Switch, Support getting chain mapping

Currently, we write chain register mapping on miss from the the last
prio of a chain. It is used to restore the chain in software.

To support re-using the chain register mapping from global tables (such
as CT tuple table) misses, export the chain mapping.

Signed-off-by: Paul Blakey <paulb@...lanox.com>
Reviewed-by: Oz Shlomo <ozsh@...lanox.com>
---
 .../ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c   | 13 +++++++++++++
 .../ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h   |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
index bba0cec..889f942 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.c
@@ -897,6 +897,19 @@ struct mlx5_flow_table *
 	mlx5_esw_chains_cleanup(esw);
 }
 
+int
+mlx5_esw_chains_get_chain_mapping(struct mlx5_eswitch *esw, u32 chain,
+				  u32 *chain_mapping)
+{
+	return mapping_add(esw_chains_mapping(esw), &chain, chain_mapping);
+}
+
+int
+mlx5_esw_chains_put_chain_mapping(struct mlx5_eswitch *esw, u32 chain_mapping)
+{
+	return mapping_remove(esw_chains_mapping(esw), chain_mapping);
+}
+
 int mlx5_eswitch_get_chain_for_tag(struct mlx5_eswitch *esw, u32 tag,
 				   u32 *chain)
 {
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
index 01cbdf8..febfefb 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads_chains.h
@@ -29,6 +29,13 @@ struct mlx5_flow_table *
 mlx5_esw_chains_destroy_global_table(struct mlx5_eswitch *esw,
 				     struct mlx5_flow_table *ft);
 
+int
+mlx5_esw_chains_get_chain_mapping(struct mlx5_eswitch *esw, u32 chain,
+				  u32 *chain_mapping);
+int
+mlx5_esw_chains_put_chain_mapping(struct mlx5_eswitch *esw,
+				  u32 chain_mapping);
+
 int mlx5_esw_chains_create(struct mlx5_eswitch *esw);
 void mlx5_esw_chains_destroy(struct mlx5_eswitch *esw);
 
-- 
1.8.3.1