git: ebfe0400185f - main - IB/mlx5: Expose software parsing for Raw Ethernet QP

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=ebfe0400185fdcd7a512333afa7cb54d2d6ba6f6

commit ebfe0400185fdcd7a512333afa7cb54d2d6ba6f6
Author:     Vag Singh <vag.singh@oneconvergence.com>
AuthorDate: 2025-08-14 06:33:23 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-09-16 14:12:08 +0000

    IB/mlx5: Expose software parsing for Raw Ethernet QP
    
    [PATCH 17/31] FreeBSD OFED support for DPDK MLX5 PMD
    
    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.
    
    Differential revision:  https://reviews.freebsd.org/D32191
    MFC after:      1 month
---
 sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c   | 21 +++++++++++++++++++++
 sys/dev/mlx5/mlx5_ib/mlx5_ib_qp.c     |  3 +++
 sys/ofed/include/uapi/rdma/mlx5-abi.h | 17 +++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c b/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
index 019780c2ed02..960bc8985700 100644
--- a/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
+++ b/sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
@@ -883,6 +883,27 @@ 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);
 
diff --git a/sys/dev/mlx5/mlx5_ib/mlx5_ib_qp.c b/sys/dev/mlx5/mlx5_ib/mlx5_ib_qp.c
index afa4ca5456d8..10f06e710ead 100644
--- a/sys/dev/mlx5/mlx5_ib/mlx5_ib_qp.c
+++ b/sys/dev/mlx5/mlx5_ib/mlx5_ib_qp.c
@@ -1120,6 +1120,9 @@ 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);
diff --git a/sys/ofed/include/uapi/rdma/mlx5-abi.h b/sys/ofed/include/uapi/rdma/mlx5-abi.h
index f755bcd793b3..2e474f5c2d76 100644
--- a/sys/ofed/include/uapi/rdma/mlx5-abi.h
+++ b/sys/ofed/include/uapi/rdma/mlx5-abi.h
@@ -168,6 +168,22 @@ struct mlx5_ib_cqe_comp_caps {
 	__u32 supported_format; /* enum mlx5_ib_cqe_comp_res_format */
 };
 
+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;
@@ -178,6 +194,7 @@ 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;
 };
 
 enum mlx5_ib_create_cq_flags {