Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752426AbdHPR4u (ORCPT ); Wed, 16 Aug 2017 13:56:50 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:34280 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751772AbdHPR4t (ORCPT ); Wed, 16 Aug 2017 13:56:49 -0400 Date: Wed, 16 Aug 2017 10:56:47 -0700 (PDT) Message-Id: <20170816.105647.341781221143669151.davem@davemloft.net> To: dingtianhong@huawei.com Cc: jeffrey.t.kirsher@intel.com, keescook@chromium.org, linux-kernel@vger.kernel.org, sparclinux@vger.kernel.org, intel-wired-lan@lists.osuosl.org, alexander.duyck@gmail.com, netdev@vger.kernel.org Subject: Re: [PATCH net 0/2] net: ixgbe: Use new flag to disable Relaxed Ordering From: David Miller In-Reply-To: <1502876507-9360-1-git-send-email-dingtianhong@huawei.com> References: <1502876507-9360-1-git-send-email-dingtianhong@huawei.com> X-Mailer: Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 16 Aug 2017 10:56:48 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 691 Lines: 15 From: Ding Tianhong Date: Wed, 16 Aug 2017 17:41:45 +0800 > The new flag PCI_DEV_FLAGS_NO_RELAXED_ORDERING has been added > to indicate that Relaxed Ordering Attributes (RO) should not > be used for Transaction Layer Packets (TLP) targeted toward > these affected Root Port, it will clear the bit4 in the PCIe > Device Control register, so the PCIe device drivers could > query PCIe configuration space to determine if it can send > TLPs to Root Port with the Relaxed Ordering Attributes set. > > The ixgbe driver could use this flag to determine if it can > send TLPs to Root Port with the Relaxed Ordering Attributes set. I'll let the Intel guys pick this up.