On 12/19/2021 4:44 AM, yanjun.zhu@xxxxxxxxx wrote:
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From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Based on the link https://www.spinics.net/lists/linux-rdma/msg73735.html,
get the source udp port number for a QP based on the grh.flow_label or
lqpn/rqpn. This provides a better spread of traffic across NIC RX queues.
The method in the commit 2b880b2e5e03 ("RDMA/mlx5: Define RoCEv2 udp
source port when set path") is a standard way. So it is also adopted in
this commit.
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
---
V1->V2: Adopt a standard method to get udp source port.
---
drivers/infiniband/hw/irdma/verbs.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/infiniband/hw/irdma/verbs.c b/drivers/infiniband/hw/irdma/verbs.c
index 8cd5f9261692..9fe73d1db0d9 100644
--- a/drivers/infiniband/hw/irdma/verbs.c
+++ b/drivers/infiniband/hw/irdma/verbs.c
@@ -1094,6 +1094,15 @@ static int irdma_query_pkey(struct ib_device *ibdev, u32 port, u16 index,
return 0;
}
+
+static u16 irdma_get_udp_sport(u32 fl, u32 lqpn, u32 rqpn)
+{
+ if (!fl)
+ fl = rdma_calc_flow_label(lqpn, rqpn);
+
+ return rdma_flow_label_to_udp_sport(fl);
+}
+
/**
* irdma_modify_qp_roce - modify qp request
* @ibqp: qp's pointer for modify
@@ -1159,6 +1168,10 @@ int irdma_modify_qp_roce(struct ib_qp *ibqp, struct ib_qp_attr *attr,
ctx_info->roce_info->pd_id = iwpd->sc_pd.pd_id;
+ udp_info->src_port = irdma_get_udp_sport(udp_info->flow_label,
+ ibqp->qp_num,
+ roce_info->dest_qp);
+
FYI that in mlx5 driver the udp_sport is only set when address vector
and dest qpn (IB_QP_AV and IB_QP_DEST_QPN) is provided.
if (attr_mask & IB_QP_AV) {
struct irdma_av *av = &iwqp->roce_ah.av;
const struct ib_gid_attr *sgid_attr;
--
2.27.0
