From: Ariel Levkovich <lariel@mellanox.com>
Date: Sun, 13 May 2018 14:33:35 +0300
Subject: IB/mlx5: Expose MPLS related tunneling offloads
Patch-mainline: v4.18-rc1
Git-commit: e818e255a58d64e86c8c93e3aa52498b1a3d1760
References: bsc#1103991 FATE#326007
This patch reports the device's capbilities to offload
encapsulated MPLS tunnel protocols to user-space:
- Capability to offload MPLS over GRE.
- Capability to offload MPLS over UDP.
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/mlx5/main.c | 8 ++++++++
include/linux/mlx5/device.h | 5 +++++
include/linux/mlx5/mlx5_ifc.h | 4 +++-
include/uapi/rdma/mlx5-abi.h | 4 +++-
4 files changed, 19 insertions(+), 2 deletions(-)
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1084,6 +1084,14 @@ static int mlx5_ib_query_device(struct i
if (MLX5_CAP_ETH(mdev, tunnel_stateless_gre))
resp.tunnel_offloads_caps |=
MLX5_IB_TUNNELED_OFFLOADS_GRE;
+ if (MLX5_CAP_GEN(mdev, flex_parser_protocols) &
+ MLX5_FLEX_PROTO_CW_MPLS_GRE)
+ resp.tunnel_offloads_caps |=
+ MLX5_IB_TUNNELED_OFFLOADS_MPLS_GRE;
+ if (MLX5_CAP_GEN(mdev, flex_parser_protocols) &
+ MLX5_FLEX_PROTO_CW_MPLS_UDP)
+ resp.tunnel_offloads_caps |=
+ MLX5_IB_TUNNELED_OFFLOADS_MPLS_UDP;
}
if (uhw->outlen) {
--- a/include/linux/mlx5/device.h
+++ b/include/linux/mlx5/device.h
@@ -1009,6 +1009,11 @@ enum mlx5_mpls_supported_fields {
MLX5_FIELD_SUPPORT_MPLS_TTL = 1 << 3
};
+enum mlx5_flex_parser_protos {
+ MLX5_FLEX_PROTO_CW_MPLS_GRE = 1 << 4,
+ MLX5_FLEX_PROTO_CW_MPLS_UDP = 1 << 5,
+};
+
/* MLX5 DEV CAPs */
/* TODO: EAT.ME */
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -1126,7 +1126,9 @@ struct mlx5_ifc_cmd_hca_cap_bits {
u8 reserved_at_500[0x20];
u8 num_of_uars_per_page[0x20];
- u8 reserved_at_540[0x40];
+
+ u8 flex_parser_protocols[0x20];
+ u8 reserved_at_560[0x20];
u8 reserved_at_580[0x3d];
u8 cqe_128_always[0x1];
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -232,7 +232,9 @@ enum mlx5_ib_query_dev_resp_flags {
enum mlx5_ib_tunnel_offloads {
MLX5_IB_TUNNELED_OFFLOADS_VXLAN = 1 << 0,
MLX5_IB_TUNNELED_OFFLOADS_GRE = 1 << 1,
- MLX5_IB_TUNNELED_OFFLOADS_GENEVE = 1 << 2
+ MLX5_IB_TUNNELED_OFFLOADS_GENEVE = 1 << 2,
+ MLX5_IB_TUNNELED_OFFLOADS_MPLS_GRE = 1 << 3,
+ MLX5_IB_TUNNELED_OFFLOADS_MPLS_UDP = 1 << 4,
};
struct mlx5_ib_query_device_resp {