git: b6354f040818 - main - OFED: Calculate UDP source port based on flow label or lqpn/rqpn

The branch main has been updated by jhb:

URL: https://cgit.FreeBSD.org/src/commit/?id=b6354f04081823cc0ccf2af573a59a826d7763c8

commit b6354f04081823cc0ccf2af573a59a826d7763c8
Author:     John Baldwin <jhb@FreeBSD.org>
AuthorDate: 2026-06-24 19:30:56 +0000
Commit:     John Baldwin <jhb@FreeBSD.org>
CommitDate: 2026-06-24 19:30:56 +0000

    OFED: Calculate UDP source port based on flow label or lqpn/rqpn
    
    Calculate and set UDP source port based on the flow label. If flow label
    is not defined in GRH then calculate it based on lqpn/rqpn.
    
    Tested by:      Wafa Hamzah <wafah@nvidia.com> (mlx5_ib)
    Tested by:      John Baldwin <jhb@FreeBSD.org> (iw_cxgbe)
    Obtained from:  Linux commit 18451db82ef7f943c60a7fce685f16172bda5106
    Sponsored by:   Chelsio Communications
---
 sys/ofed/include/rdma/ib_verbs.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/sys/ofed/include/rdma/ib_verbs.h b/sys/ofed/include/rdma/ib_verbs.h
index 38e6858e767f..8ac13023020b 100644
--- a/sys/ofed/include/rdma/ib_verbs.h
+++ b/sys/ofed/include/rdma/ib_verbs.h
@@ -4223,4 +4223,21 @@ static inline u32 rdma_calc_flow_label(u32 lqpn, u32 rqpn)
 
 	return (u32)(v & IB_GRH_FLOWLABEL_MASK);
 }
+
+/**
+ * rdma_get_udp_sport - Calculate and set UDP source port based on the flow
+ *                      label. If flow label is not defined in GRH then
+ *                      calculate it based on lqpn/rqpn.
+ *
+ * @fl:                 flow label from GRH
+ * @lqpn:               local qp number
+ * @rqpn:               remote qp number
+ */
+static inline u16 rdma_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);
+}
 #endif /* IB_VERBS_H */