From patchwork Tue Sep 20 16:07:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Salil Mehta X-Patchwork-Id: 9342051 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 35C0D607D0 for ; Tue, 20 Sep 2016 16:12:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 277A929652 for ; Tue, 20 Sep 2016 16:12:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C3FE297F6; Tue, 20 Sep 2016 16:12:26 +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=-6.9 required=2.0 tests=BAYES_00,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 C79B829652 for ; Tue, 20 Sep 2016 16:12:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933313AbcITQKD (ORCPT ); Tue, 20 Sep 2016 12:10:03 -0400 Received: from szxga02-in.huawei.com ([119.145.14.65]:48585 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933278AbcITQJ7 (ORCPT ); Tue, 20 Sep 2016 12:09:59 -0400 Received: from 172.24.1.60 (EHLO szxeml427-hub.china.huawei.com) ([172.24.1.60]) by szxrg02-dlp.huawei.com (MOS 4.3.7-GA FastPath queued) with ESMTP id DNI71047; Wed, 21 Sep 2016 00:09:51 +0800 (CST) Received: from S00293818-DELL1.china.huawei.com (10.47.136.51) by szxeml427-hub.china.huawei.com (10.82.67.182) with Microsoft SMTP Server id 14.3.235.1; Wed, 21 Sep 2016 00:09:44 +0800 From: Salil Mehta To: CC: , , , , , , , , , Dongdong Huang Subject: [PATCH V2 for-next 12/19] IB/hns: The Ack timeout need a lower limit value Date: Tue, 20 Sep 2016 17:07:05 +0100 Message-ID: <20160920160712.1190216-13-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 In-Reply-To: <20160920160712.1190216-1-salil.mehta@huawei.com> References: <20160920160712.1190216-1-salil.mehta@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.47.136.51] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020202.57E15F50.0015, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-06-18 04:22:30, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 994c31a5c3fd921c6caaa6b965466d9b 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 From: Lijun Ou The Ack timeout of qpc need a lower limit value,otherwise the read performance will be very lower. Signed-off-by: Lijun Ou Signed-off-by: Dongdong Huang(Donald) Reviewed-by: Wei Hu (Xavier) Signed-off-by: Salil Mehta --- drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c index 1205d1a..5110a18 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c @@ -2410,10 +2410,19 @@ static int hns_roce_v1_m_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr, QP_CONTEXT_QPC_BYTES_156_RETRY_COUNT_INIT_M, QP_CONTEXT_QPC_BYTES_156_RETRY_COUNT_INIT_S, attr->retry_cnt); - roce_set_field(context->qpc_bytes_156, - QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_M, - QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_S, - attr->timeout); + if (attr->timeout < 0x12) { + dev_info(dev, "ack timeout value(0x%x) must bigger than 0x12.\n", + attr->timeout); + roce_set_field(context->qpc_bytes_156, + QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_M, + QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_S, + 0x12); + } else { + roce_set_field(context->qpc_bytes_156, + QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_M, + QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_S, + attr->timeout); + } roce_set_field(context->qpc_bytes_156, QP_CONTEXT_QPC_BYTES_156_RNR_RETRY_COUNT_INIT_M, QP_CONTEXT_QPC_BYTES_156_RNR_RETRY_COUNT_INIT_S,