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IB/mlx5: Expose software parsing for Raw Ethernet QP

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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: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Noa Osherovich 2017-08-17 15:52:28 +03:00 committed by Doug Ledford
parent 4b7ee6781f
commit 96dc3fc5f1
3 changed files with 41 additions and 0 deletions
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21
drivers/infiniband/hw/mlx5/main.c
View File

@ -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);

3
drivers/infiniband/hw/mlx5/qp.c
View File

@ -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);

17
include/uapi/rdma/mlx5-abi.h
View File

@ -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 {