51 lines
2.0 KiB
Diff
51 lines
2.0 KiB
Diff
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From 1e168586452dc8ee4b41384d4ba5030408ba28f7 Mon Sep 17 00:00:00 2001
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From: Junxian Huang <huangjunxian6@hisilicon.com>
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Date: Fri, 8 Nov 2024 17:04:09 +0800
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Subject: [PATCH] libhns: Fix out-of-order issue of requester when
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setting FENCE
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mainline inclusion
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from mainline-master
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commit c4119911c212aaa552c9cb928fba0a696640c9b5
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category: bugfix
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bugzilla: https://gitee.com/src-openeuler/rdma-core/issues/IB3ZHQ
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CVE: NA
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Reference: https://github.com/linux-rdma/rdma-core/pull/1513/commits/c4119911c212aaa552c9cb928fba0a696640c9b5
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----------------------------------------------------------------------
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The FENCE indicator in hns WQE doesn't ensure that response data from
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a previous Read/Atomic operation has been written to the requester's
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memory before the subsequent Send/Write operation is processed. This
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may result in the subsequent Send/Write operation accessing the original
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data in memory instead of the expected response data.
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Unlike FENCE, the SO (Strong Order) indicator blocks the subsequent
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operation until the previous response data is written to memory and a
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bresp is returned. Set the SO indicator instead of FENCE to maintain
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strict order.
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Fixes: cbdf5e32a855 ("libhns: Reimplement verbs of post_send and post_recv for hip08 RoCE")
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Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
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Signed-off-by: Xinghai Cen <cenxinghai@h-partners.com>
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---
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providers/hns/hns_roce_u_hw_v2.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c
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index 9371150..2debcb3 100644
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--- a/providers/hns/hns_roce_u_hw_v2.c
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+++ b/providers/hns/hns_roce_u_hw_v2.c
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@@ -1527,7 +1527,7 @@ static int set_rc_wqe(void *wqe, struct hns_roce_qp *qp, struct ibv_send_wr *wr,
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hr_reg_write_bool(wqe, RCWQE_CQE,
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!!(wr->send_flags & IBV_SEND_SIGNALED));
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- hr_reg_write_bool(wqe, RCWQE_FENCE,
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+ hr_reg_write_bool(wqe, RCWQE_SO,
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!!(wr->send_flags & IBV_SEND_FENCE));
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hr_reg_write_bool(wqe, RCWQE_SE,
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!!(wr->send_flags & IBV_SEND_SOLICITED));
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--
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2.25.1
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