net/mlx5: DR, Proper handling of unsupported Connect-X6DX SW steering

STEs format for Connect-X5 and Connect-X6DX different. Currently, on
Connext-X6DX the SW steering would break at some point when building STEs
w/o giving a proper error message. Fix this by checking the STE format of
the current device when initializing domain: add mlx5_ifc definitions for
Connect-X6DX SW steering, read FW capability to get the current format
version, and check this version when domain is being created.

Fixes: 26d688e33f88 ("net/mlx5: DR, Add Steering entry (STE) utilities")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c
index 6bd34b2..51bbd88 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c
@@ -92,6 +92,7 @@ int mlx5dr_cmd_query_device(struct mlx5_core_dev *mdev,
        caps->eswitch_manager   = MLX5_CAP_GEN(mdev, eswitch_manager);
        caps->gvmi              = MLX5_CAP_GEN(mdev, vhca_id);
        caps->flex_protocols    = MLX5_CAP_GEN(mdev, flex_parser_protocols);
+       caps->sw_format_ver     = MLX5_CAP_GEN(mdev, steering_format_version);
 
        if (mlx5dr_matcher_supp_flex_parser_icmp_v4(caps)) {
                caps->flex_parser_id_icmp_dw0 = MLX5_CAP_GEN(mdev, flex_parser_id_icmp_dw0);

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c
index 890767a..aa2c2d6 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_domain.c
@@ -223,6 +223,11 @@ static int dr_domain_caps_init(struct mlx5_core_dev *mdev,
        if (ret)
                return ret;
 
+       if (dmn->info.caps.sw_format_ver != MLX5_STEERING_FORMAT_CONNECTX_5) {
+               mlx5dr_err(dmn, "SW steering is not supported on this device\n");
+               return -EOPNOTSUPP;
+       }
+
        ret = dr_domain_query_fdb_caps(mdev, dmn);
        if (ret)
                return ret;

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
index f50f3b1..cf62ea4 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_types.h
@@ -625,6 +625,7 @@ struct mlx5dr_cmd_caps {
        u8 max_ft_level;
        u16 roce_min_src_udp;
        u8 num_esw_ports;
+       u8 sw_format_ver;
        bool eswitch_manager;
        bool rx_sw_owner;
        bool tx_sw_owner;

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index a092346..2333524 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1223,6 +1223,11 @@ enum mlx5_fc_bulk_alloc_bitmask {
 
 #define MLX5_FC_BULK_NUM_FCS(fc_enum) (MLX5_FC_BULK_SIZE_FACTOR * (fc_enum))
 
+enum {
+       MLX5_STEERING_FORMAT_CONNECTX_5   = 0,
+       MLX5_STEERING_FORMAT_CONNECTX_6DX = 1,
+};
+
 struct mlx5_ifc_cmd_hca_cap_bits {
        u8         reserved_at_0[0x30];
        u8         vhca_id[0x10];
@@ -1521,7 +1526,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
 
        u8         general_obj_types[0x40];
 
-       u8         reserved_at_440[0x20];
+       u8         reserved_at_440[0x4];
+       u8         steering_format_version[0x4];
+       u8         create_qp_start_hint[0x18];
 
        u8         reserved_at_460[0x3];
        u8         log_max_uctx[0x5];