github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-26 18:12:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

RDMA/hns: Notify ULP of remaining soft-WCs during reset

Browse Source 
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: 626903e935 ("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>
This commit is contained in:
Chengchang Tang 2026-01-04 14:40:57 +08:00 committed by Leon Romanovsky
parent 84bd5d60f0
commit 0789f92990
1 changed files with 23 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
View File

@ -3739,6 +3739,23 @@ 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)
{
@ -3747,6 +3764,12 @@ 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