libhns:Fix the identification mark of RDMA UD packet

driver inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/rdma-core/issues/IBOR88

----------------------------------------------------------------------

Fixes several bugs for hns:
libhns: Add the parsing of mac type in RoH mode

Signed-off-by: Dazhao Lao <laodazhao@huawei.com>

0091-libhns-Fix-the-identification-mark-of-RDMA-UD-packet.patch

@@ -0,0 +1,45 @@
+From 12c5c68053977fcd3ac872f080de6d5a2377f5e6 Mon Sep 17 00:00:00 2001
+From: Dazhao Lao <laodazhao@huawei.com>
+Date: Tue, 25 Feb 2025 14:51:07 +0800
+Subject: [PATCH] libhns: Fix the identification mark of RDMA UD packets in ROH
+ mode.
+
+Currently, DMAC[0]=0xFF is used as the special processing
+identification mark of RDMA UD packets. After ROH_MAC
+recognizes this mark, it goes to IP over HCCS and retains
+the IP header information to meet the needs of MPI and RDMA
+CM link establishment; but DMAC[0]=0xFF is a special
+processing that will modify the DMAC to a multicast MAC
+address. In MPI usage scenarios, there are a large number
+of loopback messages, causing the multicast address to be
+directly loopback processed by the SSU. The performance of
+the SSU in processing multicast messages Lower than unicast
+packets, there is a performance bottleneck.
+
+The patch modifies the special identification mark of RMDA
+UD messages in ROH mode, using DMAC[0]=0xF0 as the
+identifier, so that DMAC is a unicast MAC address, thereby
+avoiding the bottleneck of multicast message processing.
+
+Fixes: 406d04f2ec27 ("libhns: Add the parsing of mac type in RoH mode")
+Signed-off-by: Dazhao Lao <laodazhao@huawei.com>
+---
+ providers/hns/hns_roce_u_hw_v2.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
+index 62bf478..1bbd788 100644
+--- a/providers/hns/hns_roce_u_hw_v2.c
++++ b/providers/hns/hns_roce_u_hw_v2.c
+@@ -1428,7 +1428,7 @@ static int set_ud_wqe(void *wqe, struct hns_roce_qp *qp, struct ibv_send_wr *wr,
+ 		return ret;
+ 
+ 	if (hr_dev->link_type == HNS_DEV_LINK_TYPE_HCCS)
+-		ud_sq_wqe->dmac[0] = 0xFF;
++		ud_sq_wqe->dmac[0] = 0xF0;
+ 
+ 	ret = fill_ud_data_seg(ud_sq_wqe, qp, wr, sge_info);
+ 	if (ret)
+-- 
+2.33.0
+

rdma-core.spec

@@ -1,6 +1,6 @@
 Name:           rdma-core
 Version:        41.0
-Release:        29
+Release:        30
 Summary:        RDMA core userspace libraries and daemons
 License:        GPLv2 or BSD
 Url:            https://github.com/linux-rdma/rdma-core
@@ -96,6 +96,7 @@ patch87: 0087-libhns-Fix-out-of-order-issue-of-requester-when-sett.patch
 patch88: 0088-libhns-Fix-reference-to-uninitialized-cq-pointer.patch
 patch89: 0089-libhns-Fix-bypassed-vendor-check-in-hnsdv_query_devi.patch
 patch90: 0090-libhns-Fix-coredump-during-QP-destruction-when-send_.patch
+patch91: 0091-libhns-Fix-the-identification-mark-of-RDMA-UD-packet.patch
 
 BuildRequires:  binutils cmake >= 2.8.11 gcc libudev-devel pkgconfig pkgconfig(libnl-3.0)
 BuildRequires:  pkgconfig(libnl-route-3.0) valgrind-devel systemd systemd-devel
@@ -343,6 +344,12 @@ fi
 %{_mandir}/*
 
 %changelog
+* Thu Feb 25 2025 Dazhao Lao <laodazhao@huawei.com> - 41.0-30
+- Type: bugfix
+- ID: NA
+- SUG: NA
+- DESC: Fixed roh ud wqe dmac in libhns
+
 * Thu Jan 2 2025 Xinghai Cen <cenxinghai@h-partners.com> - 41.0-29
 - Type: bugfix
 - ID: NA