net/mlx5: DR, Create multi-destination flow table with level less than 64

Flow table that contains flow pointing to multiple flow tables or multiple
TIRs must have a level lower than 64. In our case it applies to muli-
destination flow table.
Fix the level of the created table to comply with HW Spec definitions, and
still make sure that its level lower than SW-owned tables, so that it
would be possible to point from the multi-destination FW table to SW
tables.

Fixes: 34583beea4b7 ("net/mlx5: DR, Create multi-destination table for SW-steering use")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Reviewed-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_fw.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_fw.c
index 1fbcd01..7ccfd40 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_fw.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_fw.c
@@ -112,7 +112,8 @@ int mlx5dr_fw_create_md_tbl(struct mlx5dr_domain *dmn,
        int ret;
 
        ft_attr.table_type = MLX5_FLOW_TABLE_TYPE_FDB;
-       ft_attr.level = dmn->info.caps.max_ft_level - 2;
+       ft_attr.level = min_t(int, dmn->info.caps.max_ft_level - 2,
+                             MLX5_FT_MAX_MULTIPATH_LEVEL);
        ft_attr.reformat_en = reformat_req;
        ft_attr.decap_en = reformat_req;
 

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 6d16eed..eb86e80 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1289,6 +1289,8 @@ enum mlx5_fc_bulk_alloc_bitmask {
 
 #define MLX5_FC_BULK_NUM_FCS(fc_enum) (MLX5_FC_BULK_SIZE_FACTOR * (fc_enum))
 
+#define MLX5_FT_MAX_MULTIPATH_LEVEL 63
+
 enum {
        MLX5_STEERING_FORMAT_CONNECTX_5   = 0,
        MLX5_STEERING_FORMAT_CONNECTX_6DX = 1,