From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0126C04AB5 for ; Thu, 6 Jun 2019 07:10:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BF6CF2083D for ; Thu, 6 Jun 2019 07:10:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726793AbfFFHJ4 (ORCPT ); Thu, 6 Jun 2019 03:09:56 -0400 Received: from esa6.microchip.iphmx.com ([216.71.154.253]:25148 "EHLO esa6.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725782AbfFFHJ4 (ORCPT ); Thu, 6 Jun 2019 03:09:56 -0400 Received-SPF: SoftFail (esa6.microchip.iphmx.com: domain of kelvin.cao@microchip.com is inclined to not designate 208.19.100.22 as permitted sender) identity=mailfrom; client-ip=208.19.100.22; receiver=esa6.microchip.iphmx.com; envelope-from="kelvin.cao@microchip.com"; x-sender="kelvin.cao@microchip.com"; x-conformance=spf_only; x-record-type="v=spf1"; x-record-text="v=spf1 mx a:ushub1.microchip.com a:smtpout.microchip.com a:mx1.microchip.iphmx.com a:mx2.microchip.iphmx.com include:servers.mcsv.net include:mktomail.com include:spf.protection.outlook.com ~all" Received-SPF: None (esa6.microchip.iphmx.com: no sender authenticity information available from domain of postmaster@smtp.microsemi.com) identity=helo; client-ip=208.19.100.22; receiver=esa6.microchip.iphmx.com; envelope-from="kelvin.cao@microchip.com"; x-sender="postmaster@smtp.microsemi.com"; x-conformance=spf_only Authentication-Results: esa6.microchip.iphmx.com; dkim=none (message not signed) header.i=none; spf=SoftFail smtp.mailfrom=kelvin.cao@microchip.com; spf=None smtp.helo=postmaster@smtp.microsemi.com; dmarc=fail (p=none dis=none) d=microchip.com X-IronPort-AV: E=Sophos;i="5.63,558,1557212400"; d="scan'208";a="33318222" Received: from unknown (HELO smtp.microsemi.com) ([208.19.100.22]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 06 Jun 2019 00:09:56 -0700 Received: from AVMBX3.microsemi.net (10.100.34.33) by AVMBX2.microsemi.net (10.100.34.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Thu, 6 Jun 2019 00:09:55 -0700 Received: from AVMBX3.microsemi.net (10.100.34.33) by AVMBX3.microsemi.net (10.100.34.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Thu, 6 Jun 2019 00:09:54 -0700 Received: from NTB-Peer.microsemi.net (10.188.116.183) by avmbx3.microsemi.net (10.100.34.33) with Microsoft SMTP Server id 15.1.1713.5 via Frontend Transport; Thu, 6 Jun 2019 00:09:52 -0700 From: Kelvin Cao To: , , , , , , , CC: , Subject: [PATCH 2/3] ntb_hw_switchtec: Skip unnecessary re-setup of shared memory window for crosslink case Date: Thu, 6 Jun 2019 15:09:43 +0800 Message-ID: <1559804984-24698-3-git-send-email-kelvin.cao@microchip.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1559804984-24698-1-git-send-email-kelvin.cao@microchip.com> References: <1559804984-24698-1-git-send-email-kelvin.cao@microchip.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Wesley Sheng In case of NTB crosslink topology, the setting of shared memory window in the virtual partition doesn't reset on peer's reboot. So skip the unnecessary re-setup of shared memory window for that case. Signed-off-by: Wesley Sheng --- drivers/ntb/hw/mscc/ntb_hw_switchtec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c index 947ed0b..6cf15c18 100644 --- a/drivers/ntb/hw/mscc/ntb_hw_switchtec.c +++ b/drivers/ntb/hw/mscc/ntb_hw_switchtec.c @@ -1459,6 +1459,9 @@ static int switchtec_ntb_reinit_peer(struct switchtec_ntb *sndev) { int rc; + if (crosslink_is_enabled(sndev)) + return 0; + dev_info(&sndev->stdev->dev, "reinitialize shared memory window\n"); rc = config_rsvd_lut_win(sndev, sndev->mmio_peer_ctrl, 0, sndev->self_partition, -- 2.7.4