Commit 96dc3fc5 authored by Noa Osherovich's avatar Noa Osherovich Committed by Doug Ledford
Browse files

IB/mlx5: Expose software parsing for Raw Ethernet QP 



Software parsing (SWP) is a feature that can be used to instruct the
device to stop using its internal parser and to parse packets on the
transmit path according to offsets set for each packets.

Through this feature, the device allows the handling of checksum and
LSO by the hardware according to the location of IP and TCP/UDP
headers.

Enable SW parsing on Raw Ethernet send queue by default if firmware
supports it and report these capabilities to user space.

Signed-off-by: default avatarNoa Osherovich <noaos@mellanox.com>
Reviewed-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4b7ee678

drivers/infiniband/hw/mlx5/main.c

+21 −0
Original line number Diff line number Diff line
@@ -811,6 +811,27 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, 
	if (field_avail(typeof(resp), reserved, uhw->outlen))

		resp.response_length += sizeof(resp.reserved);



	if (field_avail(typeof(resp), sw_parsing_caps,

			uhw->outlen)) {

		resp.response_length += sizeof(resp.sw_parsing_caps);

		if (MLX5_CAP_ETH(mdev, swp)) {

			resp.sw_parsing_caps.sw_parsing_offloads |=

				MLX5_IB_SW_PARSING;



			if (MLX5_CAP_ETH(mdev, swp_csum))

				resp.sw_parsing_caps.sw_parsing_offloads |=

					MLX5_IB_SW_PARSING_CSUM;



			if (MLX5_CAP_ETH(mdev, swp_lso))

				resp.sw_parsing_caps.sw_parsing_offloads |=

					MLX5_IB_SW_PARSING_LSO;



			if (resp.sw_parsing_caps.sw_parsing_offloads)

				resp.sw_parsing_caps.supported_qpts =

					BIT(IB_QPT_RAW_PACKET);

		}

	}



	if (uhw->outlen) {

		err = ib_copy_to_udata(uhw, &resp, resp.response_length);

drivers/infiniband/hw/mlx5/qp.c

+3 −0
Original line number Diff line number Diff line
@@ -1088,6 +1088,9 @@ static int create_raw_packet_qp_sq(struct mlx5_ib_dev *dev, 
	MLX5_SET(sqc, sqc, cqn, MLX5_GET(qpc, qpc, cqn_snd));

	MLX5_SET(sqc, sqc, tis_lst_sz, 1);

	MLX5_SET(sqc, sqc, tis_num_0, sq->tisn);

	if (MLX5_CAP_GEN(dev->mdev, eth_net_offloads) &&

	    MLX5_CAP_ETH(dev->mdev, swp))

		MLX5_SET(sqc, sqc, allow_swp, 1);



	wq = MLX5_ADDR_OF(sqc, sqc, wq);

	MLX5_SET(wq, wq, wq_type, MLX5_WQ_TYPE_CYCLIC);

include/uapi/rdma/mlx5-abi.h

+17 −0
Original line number Diff line number Diff line
@@ -168,6 +168,22 @@ struct mlx5_packet_pacing_caps { 
	__u32 reserved;

};



enum mlx5_ib_sw_parsing_offloads {

	MLX5_IB_SW_PARSING = 1 << 0,

	MLX5_IB_SW_PARSING_CSUM = 1 << 1,

	MLX5_IB_SW_PARSING_LSO = 1 << 2,

};



struct mlx5_ib_sw_parsing_caps {

	__u32 sw_parsing_offloads; /* enum mlx5_ib_sw_parsing_offloads */



	/* Corresponding bit will be set if qp type from

	 * 'enum ib_qp_type' is supported, e.g.

	 * supported_qpts |= 1 << IB_QPT_RAW_PACKET

	 */

	__u32 supported_qpts;

};



struct mlx5_ib_query_device_resp {

	__u32	comp_mask;

	__u32	response_length;
@@ -177,6 +193,7 @@ struct mlx5_ib_query_device_resp { 
	struct	mlx5_packet_pacing_caps packet_pacing_caps;

	__u32	mlx5_ib_support_multi_pkt_send_wqes;

	__u32	reserved;

	struct mlx5_ib_sw_parsing_caps sw_parsing_caps;

};



struct mlx5_ib_create_cq {

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