net/mlx5: DR, Check force-loopback RC QP capability independently from RoCE

commit c7dd225bc224726c22db08e680bf787f60ebdee3 upstream.

SW Steering uses RC QP for writing STEs to ICM. This writingis done in LB
(loopback), and FL (force-loopback) QP is preferred for performance. FL is
available when RoCE is enabled or disabled based on RoCE caps.
This patch adds reading of FL capability from HCA caps in addition to the
existing reading from RoCE caps, thus fixing the case where we didn't
have loopback enabled when RoCE was disabled.

Fixes: 1743f9ab64af ("net/mlx5: DR, Add support for force-loopback QP")
Signed-off-by: Itamar Gozlan <igozlan@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 16d65fe4f654ac7bb035b3afc8ce0fc736470261..84364691a37919b25bb805948213d4ef0a27b2c7 100644 (file)
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_cmd.c
@@ -117,6 +117,8 @@ int mlx5dr_cmd_query_device(struct mlx5_core_dev *mdev,
        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);
+       caps->roce_caps.fl_rc_qp_when_roce_disabled =
+               MLX5_CAP_GEN(mdev, fl_rc_qp_when_roce_disabled);
 
        if (MLX5_CAP_GEN(mdev, roce)) {
                err = dr_cmd_query_nic_vport_roce_en(mdev, 0, &roce_en);
@@ -124,7 +126,7 @@ int mlx5dr_cmd_query_device(struct mlx5_core_dev *mdev,
                        return err;
 
                caps->roce_caps.roce_en = roce_en;
-               caps->roce_caps.fl_rc_qp_when_roce_disabled =
+               caps->roce_caps.fl_rc_qp_when_roce_disabled |=
                        MLX5_CAP_ROCE(mdev, fl_rc_qp_when_roce_disabled);
                caps->roce_caps.fl_rc_qp_when_roce_enabled =
                        MLX5_CAP_ROCE(mdev, fl_rc_qp_when_roce_enabled);

diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h
index 097cbf84c1e05201d932b3c5b7c0a4538bf29f28..b2aee17a34d7758a8cf6b569a8567f4277b761a4 100644 (file)
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1639,7 +1639,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
        u8         rc[0x1];
 
        u8         uar_4k[0x1];
-       u8         reserved_at_241[0x9];
+       u8         reserved_at_241[0x7];
+       u8         fl_rc_qp_when_roce_disabled[0x1];
+       u8         regexp_params[0x1];
        u8         uar_sz[0x6];
        u8         port_selection_cap[0x1];
        u8         reserved_at_248[0x1];