From d727d27db536faea7178290c677cc0567f647231 Mon Sep 17 00:00:00 2001 From: Mark Bloch Date: Wed, 6 Dec 2023 16:01:38 +0200 Subject: [PATCH] RDMA/mlx5: Expose register c0 for RDMA device This patch introduces improvements for matching egress traffic sent by the local device. When applicable, all egress traffic from the local vport is now tagged with the provided value. This enhancement is particularly useful for FDB steering purposes. The primary focus of this update is facilitating the transmission of traffic from the hypervisor to a VF. To achieve this, one must initiate an SQ on the hypervisor and subsequently create a rule in the FDB that matches on the eswitch manager vport and the SQN of the aforementioned SQ. Obtaining the SQN can be had from SQ opened, and the eswitch manager vport match can be substituted with the register c0 value exposed by this patch. Signed-off-by: Mark Bloch Reviewed-by: Michael Guralnik Link: https://lore.kernel.org/r/aa4120a91c98ff1c44f1213388c744d4cb0324d6.1701871118.git.leon@kernel.org Signed-off-by: Leon Romanovsky --- drivers/infiniband/hw/mlx5/main.c | 24 ++++++++++++++++++++++++ include/uapi/rdma/mlx5-abi.h | 2 ++ 2 files changed, 26 insertions(+) diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c index 650a15b6cfbc..c2b557e64290 100644 --- a/drivers/infiniband/hw/mlx5/main.c +++ b/drivers/infiniband/hw/mlx5/main.c @@ -818,6 +818,17 @@ static int mlx5_query_node_desc(struct mlx5_ib_dev *dev, char *node_desc) MLX5_REG_NODE_DESC, 0, 0); } +static void fill_esw_mgr_reg_c0(struct mlx5_core_dev *mdev, + struct mlx5_ib_query_device_resp *resp) +{ + struct mlx5_eswitch *esw = mdev->priv.eswitch; + u16 vport = mlx5_eswitch_manager_vport(mdev); + + resp->reg_c0.value = mlx5_eswitch_get_vport_metadata_for_match(esw, + vport); + resp->reg_c0.mask = mlx5_eswitch_get_vport_metadata_mask(); +} + static int mlx5_ib_query_device(struct ib_device *ibdev, struct ib_device_attr *props, struct ib_udata *uhw) @@ -1209,6 +1220,19 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, MLX5_CAP_GEN(mdev, log_max_dci_errored_streams); } + if (offsetofend(typeof(resp), reserved) <= uhw_outlen) + resp.response_length += sizeof(resp.reserved); + + if (offsetofend(typeof(resp), reg_c0) <= uhw_outlen) { + struct mlx5_eswitch *esw = mdev->priv.eswitch; + + resp.response_length += sizeof(resp.reg_c0); + + if (mlx5_eswitch_mode(mdev) == MLX5_ESWITCH_OFFLOADS && + mlx5_eswitch_vport_match_metadata_enabled(esw)) + fill_esw_mgr_reg_c0(mdev, &resp); + } + if (uhw_outlen) { err = ib_copy_to_udata(uhw, &resp, resp.response_length); diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h index a96b7d2770e1..d4f6a36dffb0 100644 --- a/include/uapi/rdma/mlx5-abi.h +++ b/include/uapi/rdma/mlx5-abi.h @@ -37,6 +37,7 @@ #include #include /* For ETH_ALEN. */ #include +#include enum { MLX5_QP_FLAG_SIGNATURE = 1 << 0, @@ -275,6 +276,7 @@ struct mlx5_ib_query_device_resp { __u32 tunnel_offloads_caps; /* enum mlx5_ib_tunnel_offloads */ struct mlx5_ib_dci_streams_caps dci_streams_caps; __u16 reserved; + struct mlx5_ib_uapi_reg reg_c0; }; enum mlx5_ib_create_cq_flags {