From patchwork Fri May 11 03:33:29 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lijun Ou X-Patchwork-Id: 10393177 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D745660236 for ; Fri, 11 May 2018 03:34:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DEFD028D1D for ; Fri, 11 May 2018 03:34:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D3A7D28DF2; Fri, 11 May 2018 03:34:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 901B528DEF for ; Fri, 11 May 2018 03:34:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752430AbeEKDeW (ORCPT ); Thu, 10 May 2018 23:34:22 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:58825 "EHLO huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752403AbeEKDeV (ORCPT ); Thu, 10 May 2018 23:34:21 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 8971C169AA64D; Fri, 11 May 2018 11:34:18 +0800 (CST) Received: from localhost.localdomain (10.67.212.75) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.361.1; Fri, 11 May 2018 11:34:14 +0800 From: Lijun Ou To: , , CC: Subject: [PATCH rdma-core 5/6] libhns: Add memory barrier operation Date: Fri, 11 May 2018 11:33:29 +0800 Message-ID: <1526009610-72089-6-git-send-email-oulijun@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1526009610-72089-1-git-send-email-oulijun@huawei.com> References: <1526009610-72089-1-git-send-email-oulijun@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.212.75] X-CFilter-Loop: Reflected Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch mainly add memory barrier operation for making sure rqwqe are written before ring the doorbell. Signed-off-by: Lijun Ou --- providers/hns/hns_roce_u_hw_v2.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/providers/hns/hns_roce_u_hw_v2.c b/providers/hns/hns_roce_u_hw_v2.c index 42bd5dd..7323eaa 100644 --- a/providers/hns/hns_roce_u_hw_v2.c +++ b/providers/hns/hns_roce_u_hw_v2.c @@ -841,6 +841,8 @@ out: if (nreq) { qp->rq.head += nreq; + udma_to_device_barrier(); + if (qp->flags & HNS_ROCE_SUPPORT_RQ_RECORD_DB) *qp->rdb = qp->rq.head & 0xffff; else