diff options
| author | Chengchang Tang <tangchengchang@huawei.com> | 2026-01-04 14:40:57 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-02-26 14:59:23 -0800 |
| commit | 8bf968d68ea6c43c78db708f92fa76ba4a15cadd (patch) | |
| tree | 707e3ba09e8133d821b278c9e3b83b3cba32125c /drivers/infiniband | |
| parent | 4994b9be17ff742113973f7966080f98c251e1a5 (diff) | |
RDMA/hns: Notify ULP of remaining soft-WCs during reset
[ Upstream commit 0789f929900d85b80b343c5f04f8b9444e991384 ]
During a reset, software-generated WCs cannot be reported via
interrupts. This may cause the ULP to miss some WCs.
To avoid this, add check in the CQ arm process: if a hardware reset
has occurred and there are still unreported soft-WCs, notify the ULP
to handle the remaining WCs, thereby preventing any loss of completions.
Fixes: 626903e9355b ("RDMA/hns: Add support for reporting wc as software mode")
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Link: https://patch.msgid.link/20260104064057.1582216-5-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index b0e7c5c6e2ff..f895731ad74a 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -3661,6 +3661,23 @@ static void hns_roce_v2_write_cqc(struct hns_roce_dev *hr_dev, HNS_ROCE_V2_CQ_DEFAULT_INTERVAL); } +static bool left_sw_wc(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq) +{ + struct hns_roce_qp *hr_qp; + + list_for_each_entry(hr_qp, &hr_cq->sq_list, sq_node) { + if (hr_qp->sq.head != hr_qp->sq.tail) + return true; + } + + list_for_each_entry(hr_qp, &hr_cq->rq_list, rq_node) { + if (hr_qp->rq.head != hr_qp->rq.tail) + return true; + } + + return false; +} + static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) { @@ -3669,6 +3686,12 @@ static int hns_roce_v2_req_notify_cq(struct ib_cq *ibcq, struct hns_roce_v2_db cq_db = {}; u32 notify_flag; + if (hr_dev->state >= HNS_ROCE_DEVICE_STATE_RST_DOWN) { + if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && + left_sw_wc(hr_dev, hr_cq)) + return 1; + return 0; + } /* * flags = 0, then notify_flag : next * flags = 1, then notify flag : solocited |