[PATCH rdma-next 5/8] RDMA/mlx5: Report packet pacing capabilities when querying device
From: Edward Srouji <hidden>
Date: 2026-05-24 15:39:13
Also in:
linux-rdma, lkml
Subsystem:
infiniband subsystem, mellanox mlx5 ib driver, the rest · Maintainers:
Jason Gunthorpe, Leon Romanovsky, Linus Torvalds
From: Maher Sanalla <redacted> When querying device, report packet pacing capabilities for UD and UC QPs when device supports it. Signed-off-by: Maher Sanalla <redacted> Reviewed-by: Michael Guralnik <redacted> Signed-off-by: Edward Srouji <redacted> --- drivers/infiniband/hw/mlx5/main.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 428811fa805b68bf6a011685e027b8407a3e1719..fee5329cf398092c5096ca67aa23880b6e829177 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c@@ -1214,20 +1214,29 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, } } - if (offsetofend(typeof(resp), packet_pacing_caps) <= uhw_outlen && - raw_support) { - if (MLX5_CAP_QOS(mdev, packet_pacing) && - MLX5_CAP_GEN(mdev, qos)) { - resp.packet_pacing_caps.qp_rate_limit_max = - MLX5_CAP_QOS(mdev, packet_pacing_max_rate); - resp.packet_pacing_caps.qp_rate_limit_min = - MLX5_CAP_QOS(mdev, packet_pacing_min_rate); - resp.packet_pacing_caps.supported_qpts |= - 1 << IB_QPT_RAW_PACKET; - if (MLX5_CAP_QOS(mdev, packet_pacing_burst_bound) && - MLX5_CAP_QOS(mdev, packet_pacing_typical_size)) - resp.packet_pacing_caps.cap_flags |= - MLX5_IB_PP_SUPPORT_BURST; + if (offsetofend(typeof(resp), packet_pacing_caps) <= uhw_outlen) { + if (MLX5_CAP_GEN(mdev, qos)) { + if (MLX5_CAP_QOS(mdev, packet_pacing) && raw_support) + resp.packet_pacing_caps.supported_qpts |= + BIT(IB_QPT_RAW_PACKET); + if (MLX5_CAP_QOS(mdev, packet_pacing_req_ud)) + resp.packet_pacing_caps.supported_qpts |= + BIT(IB_QPT_UD); + if (MLX5_CAP_QOS(mdev, packet_pacing_req_uc)) + resp.packet_pacing_caps.supported_qpts |= + BIT(IB_QPT_UC); + + if (resp.packet_pacing_caps.supported_qpts) { + resp.packet_pacing_caps.qp_rate_limit_max = + MLX5_CAP_QOS(mdev, packet_pacing_max_rate); + resp.packet_pacing_caps.qp_rate_limit_min = + MLX5_CAP_QOS(mdev, packet_pacing_min_rate); + + if (MLX5_CAP_QOS(mdev, packet_pacing_burst_bound) && + MLX5_CAP_QOS(mdev, packet_pacing_typical_size)) + resp.packet_pacing_caps.cap_flags |= + MLX5_IB_PP_SUPPORT_BURST; + } } resp.response_length += sizeof(resp.packet_pacing_caps); }
--
2.49.0