The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 41e684ef3f37ce6e5eac3fb5b9c7c1853f4b0447 Mon Sep 17 00:00:00 2001

From: Alex Vesker valex@mellanox.com Date: Thu, 5 Mar 2020 14:38:41 +0200 Subject: [PATCH] IB/mlx5: Replace tunnel mpls capability bits for tunnel_offloads

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

diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index eba7604eaa76..9c3993c7e9a1 100644 --- 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 ib_device *ibdev, 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; } diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h index f9bcbe653fda..f3a7189f9d6d 100644 --- a/include/linux/mlx5/mlx5_ifc.h +++ b/include/linux/mlx5/mlx5_ifc.h @@ -877,7 +877,11 @@ struct mlx5_ifc_per_protocol_networking_offload_caps_bits { 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];