From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leon Romanovsky Subject: [PATCH rdma-next 1/2] IB/mlx4: Add support to RSS hash for inner headers Date: Sun, 24 Dec 2017 14:51:24 +0200 Message-ID: <20171224125125.15661-2-leon@kernel.org> References: <20171224125125.15661-1-leon@kernel.org> Return-path: In-Reply-To: <20171224125125.15661-1-leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Doug Ledford , Jason Gunthorpe Cc: linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Guy Levi , Maor Gottlieb , Yishai Hadas List-Id: linux-rdma@vger.kernel.org From: Guy Levi Support RSS hash for inner headers according to a new flag, MLX4_IB_RX_HASH_INNER provided by the vendor channel. In case the flag is set, RSS hash will be done on the inner headers of VXLAN packets (which are encapsulated). Non-encapsulated packets will be hashed according to the outer headers. Signed-off-by: Guy Levi Reviewed-by: Yishai Hadas Signed-off-by: Leon Romanovsky --- drivers/infiniband/hw/mlx4/main.c | 6 ++++++ drivers/infiniband/hw/mlx4/qp.c | 14 ++++++++++++++ include/uapi/rdma/mlx4-abi.h | 7 ++++--- 3 files changed, 24 insertions(+), 3 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c index 8c8a16791a3f..5695ce53fddb 100644 --- a/drivers/infiniband/hw/mlx4/main.c +++ b/drivers/infiniband/hw/mlx4/main.c @@ -589,6 +589,7 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, if (props->rss_caps.supported_qpts) { resp.rss_caps.rx_hash_function = MLX4_IB_RX_HASH_FUNC_TOEPLITZ; + resp.rss_caps.rx_hash_fields_mask = MLX4_IB_RX_HASH_SRC_IPV4 | MLX4_IB_RX_HASH_DST_IPV4 | @@ -598,6 +599,11 @@ static int mlx4_ib_query_device(struct ib_device *ibdev, MLX4_IB_RX_HASH_DST_PORT_TCP | MLX4_IB_RX_HASH_SRC_PORT_UDP | MLX4_IB_RX_HASH_DST_PORT_UDP; + + if (dev->dev->caps.tunnel_offload_mode == + MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) + resp.rss_caps.rx_hash_fields_mask |= + MLX4_IB_RX_HASH_INNER; } } diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 16dea0e3d50f..c305189eb4af 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -722,6 +722,20 @@ static int set_qp_rss(struct mlx4_ib_dev *dev, struct mlx4_ib_rss *rss_ctx, return (-EOPNOTSUPP); } + if (ucmd->rx_hash_fields_mask & MLX4_IB_RX_HASH_INNER) { + if (dev->dev->caps.tunnel_offload_mode == + MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) { + /* + * Hash according to inner headers if exist, otherwise + * according to outer headers. + */ + rss_ctx->flags |= MLX4_RSS_BY_INNER_HEADERS_IPONLY; + } else { + pr_debug("RSS Hash for inner headers isn't supported\n"); + return (-EOPNOTSUPP); + } + } + return 0; } diff --git a/include/uapi/rdma/mlx4-abi.h b/include/uapi/rdma/mlx4-abi.h index 224b52b6279c..7f9c37346613 100644 --- a/include/uapi/rdma/mlx4-abi.h +++ b/include/uapi/rdma/mlx4-abi.h @@ -97,8 +97,8 @@ struct mlx4_ib_create_srq_resp { }; struct mlx4_ib_create_qp_rss { - __u64 rx_hash_fields_mask; - __u8 rx_hash_function; + __u64 rx_hash_fields_mask; /* Use enum mlx4_ib_rx_hash_fields */ + __u8 rx_hash_function; /* Use enum mlx4_ib_rx_hash_function_flags */ __u8 reserved[7]; __u8 rx_hash_key[40]; __u32 comp_mask; @@ -152,7 +152,8 @@ enum mlx4_ib_rx_hash_fields { MLX4_IB_RX_HASH_SRC_PORT_TCP = 1 << 4, MLX4_IB_RX_HASH_DST_PORT_TCP = 1 << 5, MLX4_IB_RX_HASH_SRC_PORT_UDP = 1 << 6, - MLX4_IB_RX_HASH_DST_PORT_UDP = 1 << 7 + MLX4_IB_RX_HASH_DST_PORT_UDP = 1 << 7, + MLX4_IB_RX_HASH_INNER = 1ULL << 31, }; #endif /* MLX4_ABI_USER_H */ -- 2.15.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html