From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 77D44359A61 for ; Sat, 28 Feb 2026 18:13:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302402; cv=none; b=AUMVg1w9XUTRtylO+IGCgcsrcFWu65+ytm1/3fp/PZsSg7/qxHmqWdWAqyhGTeiNtrgqZURPK8Vodr3x78SSvKuu8Enj5W1Q4I/sZyLcD75B2gFoXcmv3dGKlMK7V22DPvmeSS1B1fojJrbY3h8ezCDUChL40n+psab0UIQGlaI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302402; c=relaxed/simple; bh=wVxNQnX3ZYJw+guxNyYvSWsGJQZHtGo2C8DI8z+b8K8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BXnlY1CdTxC0/RXyfRhdoAA1YLWIEYyavMAlEQdUUVCqs4WKxvr3YCZ16woELVsIC/xlYF1oJixqlGUusE0ovTLSw5Zmf2F6PiIGjVXOXlJQIx/LCIB9LeoDHtnE2pcaJRxWV894C8HsLMMdQv+XlQrt/99ZSp18ymxPNeHJQYU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=FHBlYT+x; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="FHBlYT+x" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C0791C19423; Sat, 28 Feb 2026 18:13:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302402; bh=wVxNQnX3ZYJw+guxNyYvSWsGJQZHtGo2C8DI8z+b8K8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FHBlYT+xyg/31IK+LIktgu8HWKjmI4DILVkHRU2d8UTr/RjiWRUAoLuyYArMWw/E+ w1pShkvcw7QAuAYvH8bjvKQnRoHB3qnc2b3bEhYIGNqhiaXfWFi0yoMTzbrQ3b4q0n biQFmh6gsag9e0/+UfG8FJIVmxXrPd6N53r2chgC1+yArrR76DsHYlJJrkLEex/pRx +Rnv1aDEVf4M8FLRFl3u4VJpX1LskYurMd/8ZYvZ0AoKnhMgzJaSWdBfMceUQBssC+ 9UH8IiNieu3EHuL9lTsG0NmoAqdb5f/GAAMysIc/pRxUm6ekaWUdjF/v7SBtXli/Lo EB5rkjuGTy5Hg== From: Sasha Levin To: patches@lists.linux.dev Cc: Chengchang Tang , Junxian Huang , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.1 133/232] RDMA/hns: Notify ULP of remaining soft-WCs during reset Date: Sat, 28 Feb 2026 13:09:46 -0500 Message-ID: <20260228181127.1592657-133-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228181127.1592657-1-sashal@kernel.org> References: <20260228181127.1592657-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Chengchang Tang [ 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 Signed-off-by: Junxian Huang Link: https://patch.msgid.link/20260104064057.1582216-5-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c index c9aa4c8e05371..1c180a6b1c078 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c @@ -3696,6 +3696,23 @@ 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) { @@ -3704,6 +3721,12 @@ 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 -- 2.51.0