[PATCH 5.6 28/38] IB/mlx5: Replace tunnel mpls capability bits for tunnel_offloads

Greg Kroah-Hartman
2020-04-11T12:21:18Z

From: Alex Vesker <valex@mellanox.com>

commit 41e684ef3f37ce6e5eac3fb5b9c7c1853f4b0447 upstream.

Until now the flex parser capability was used in ib_query_device() to
indicate tunnel_offloads_caps support for mpls_over_gre/mpls_over_udp.

Newer devices and firmware will have configurations with the flexparser
but without mpls support.

Testing for the flex parser capability was a mistake, the tunnel_stateless
capability was intended for detecting mpls and was introduced at the same
time as the flex parser capability.

Otherwise userspace will be incorrectly informed that a future device
supports MPLS when it does not.

Link: https://lore.kernel.org/r/20200305123841.196086-1-leon@kernel.org
Cc: <stable@vger.kernel.org> # 4.17
Fixes: e818e255a58d ("IB/mlx5: Expose MPLS related tunneling offloads")
Signed-off-by: Alex Vesker <valex@mellanox.com>
Reviewed-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/infiniband/hw/mlx5/main.c | 6 ++----
include/linux/mlx5/mlx5_ifc.h | 6 +++++-
2 files changed, 7 insertions(+), 5 deletions(-)

--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1192,12 +1192,10 @@ 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)
+ if (MLX5_CAP_ETH(mdev, tunnel_stateless_mpls_over_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)
+ if (MLX5_CAP_ETH(mdev, tunnel_stateless_mpls_over_udp))
resp.tunnel_offloads_caps |=
MLX5_IB_TUNNELED_OFFLOADS_MPLS_UDP;
}
--- a/include/linux/mlx5/mlx5_ifc.h
+++ b/include/linux/mlx5/mlx5_ifc.h
@@ -875,7 +875,11 @@ struct mlx5_ifc_per_protocol_networking_
u8 swp_csum[0x1];
u8 swp_lso[0x1];
u8 cqe_checksum_full[0x1];
- u8 reserved_at_24[0x5];
+ u8 tunnel_stateless_geneve_tx[0x1];
+ u8 tunnel_stateless_mpls_over_udp[0x1];
+ u8 tunnel_stateless_mpls_over_gre[0x1];
+ u8 tunnel_stateless_vxlan_gpe[0x1];
+ u8 tunnel_stateless_ipv4_over_vxlan[0x1];
u8 tunnel_stateless_ip_over_ip[0x1];
u8 reserved_at_2a[0x6];
u8 max_vxlan_udp_ports[0x8];