[net-next 12/14] net/mlx5: E-Switch, Enable setting goto slow path chain action

[Saeed Mahameed]

From: Paul Blakey <pa...@mellanox.com>

A pre-step for the tc offloads code to use this when a neigh is
not available for encap rules.

Signed-off-by: Paul Blakey <pa...@mellanox.com>
Reviewed-by: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: Saeed Mahameed <sae...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/eswitch.h          | 2 ++
 drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c | 6 ++++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h 
b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
index 54215f4312fa..aaafc9f17115 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch.h
@@ -60,6 +60,7 @@
        MLX5_CAP_ESW_FLOWTABLE(dev, fdb_multi_path_to_table)
 
 #define FDB_MAX_CHAIN 3
+#define FDB_SLOW_PATH_CHAIN (FDB_MAX_CHAIN + 1)
 #define FDB_MAX_PRIO 16
 
 struct vport_ingress {
@@ -356,6 +357,7 @@ static inline int  mlx5_eswitch_enable_sriov(struct 
mlx5_eswitch *esw, int nvfs,
 static inline void mlx5_eswitch_disable_sriov(struct mlx5_eswitch *esw) {}
 
 #define FDB_MAX_CHAIN 1
+#define FDB_SLOW_PATH_CHAIN (FDB_MAX_CHAIN + 1)
 #define FDB_MAX_PRIO 1
 
 #endif /* CONFIG_MLX5_ESWITCH */
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c 
b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
index 289f1992f624..42a130455ef8 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c
@@ -671,6 +671,9 @@ esw_get_prio_table(struct mlx5_eswitch *esw, u32 chain, u16 
prio, int level)
        int table_prio, l = 0;
        u32 flags = 0;
 
+       if (chain == FDB_SLOW_PATH_CHAIN)
+               return esw->fdb_table.offloads.slow_fdb;
+
        mutex_lock(&esw->fdb_table.offloads.fdb_prio_lock);
 
        fdb = fdb_prio_table(esw, chain, prio, level).fdb;
@@ -730,6 +733,9 @@ esw_put_prio_table(struct mlx5_eswitch *esw, u32 chain, u16 
prio, int level)
 {
        int l;
 
+       if (chain == FDB_SLOW_PATH_CHAIN)
+               return;
+
        mutex_lock(&esw->fdb_table.offloads.fdb_prio_lock);
 
        for (l = level; l >= 0; l--) {
-- 
2.17.2