c145befca9
This patch backport a Bugfix patch from a later versions of rdma-core. (cherry picked from commit fdf09b5dd6788beef47bcd2aba0ef838d20f8900)
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
From d72ae701214aa8318604192ac48c31c920bba593 Mon Sep 17 00:00:00 2001
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From: Yangyang Li <liyangyang20@huawei.com>
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Date: Thu, 23 Dec 2021 14:52:13 +0800
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Subject: [PATCH] libhns: Bugfix for calculation of extended sge
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Page alignment is required when setting the number of extended sge
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according to the hardware's achivement. If the space of needed extended sge
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is greater than one page, the roundup_pow_of_two() can ensure that. But if
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the needed extended sge isn't 0 and can not be filled in a whole page, the
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driver should align it specifically.
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Signed-off-by: Guofeng Yue <yueguofeng@hisilicon.com>
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---
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providers/hns/hns_roce_u_verbs.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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diff --git a/providers/hns/hns_roce_u_verbs.c b/providers/hns/hns_roce_u_verbs.c
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index abff0921..30ab072a 100644
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--- a/providers/hns/hns_roce_u_verbs.c
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+++ b/providers/hns/hns_roce_u_verbs.c
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@@ -939,7 +939,12 @@ static void set_extend_sge_param(struct hns_roce_device *hr_dev,
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}
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qp->ex_sge.sge_shift = HNS_ROCE_SGE_SHIFT;
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- qp->ex_sge.sge_cnt = cnt;
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+
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+ /* If the number of extended sge is not zero, they MUST use the
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+ * space of HNS_HW_PAGE_SIZE at least.
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+ */
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+ qp->ex_sge.sge_cnt = cnt ?
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+ max(cnt, HNS_HW_PAGE_SIZE / HNS_ROCE_SGE_SIZE) : 0;
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}
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static void hns_roce_set_qp_params(struct ibv_qp_init_attr_ex *attr,
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--
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2.33.0
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