From patchwork Fri Jul 23 11:06:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongdong Liu X-Patchwork-Id: 12395875 X-Patchwork-Delegate: bhelgaas@google.com 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 2E2A2C43216 for ; Fri, 23 Jul 2021 11:08:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1776B60E75 for ; Fri, 23 Jul 2021 11:08:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233355AbhGWK16 (ORCPT ); Fri, 23 Jul 2021 06:27:58 -0400 Received: from szxga03-in.huawei.com ([45.249.212.189]:12290 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232546AbhGWK1x (ORCPT ); Fri, 23 Jul 2021 06:27:53 -0400 Received: from dggeme758-chm.china.huawei.com (unknown [172.30.72.53]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4GWRJf6F1Mz7xHL; Fri, 23 Jul 2021 19:03:46 +0800 (CST) Received: from SZX1000464847.huawei.com (10.21.59.169) by dggeme758-chm.china.huawei.com (10.3.19.104) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Fri, 23 Jul 2021 19:08:24 +0800 From: Dongdong Liu To: , , , , , , CC: , Subject: [PATCH V6 5/8] PCI/IOV: Enable 10-Bit tag support for PCIe VF devices Date: Fri, 23 Jul 2021 19:06:39 +0800 Message-ID: <1627038402-114183-6-git-send-email-liudongdong3@huawei.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1627038402-114183-1-git-send-email-liudongdong3@huawei.com> References: <1627038402-114183-1-git-send-email-liudongdong3@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.21.59.169] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggeme758-chm.china.huawei.com (10.3.19.104) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Enable VF 10-Bit Tag Requester when it's upstream component support 10-bit Tag Completer. Signed-off-by: Dongdong Liu Reviewed-by: Christoph Hellwig --- drivers/pci/iov.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c index dafdc65..0d0bed1 100644 --- a/drivers/pci/iov.c +++ b/drivers/pci/iov.c @@ -634,6 +634,10 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) pci_iov_set_numvfs(dev, nr_virtfn); iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE; + if ((iov->cap & PCI_SRIOV_CAP_VF_10BIT_TAG_REQ) && + dev->ext_10bit_tag) + iov->ctrl |= PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN; + pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); msleep(100); @@ -650,6 +654,8 @@ static int sriov_enable(struct pci_dev *dev, int nr_virtfn) err_pcibios: iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); + if (iov->ctrl & PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN) + iov->ctrl &= ~PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN; pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); ssleep(1); @@ -682,6 +688,8 @@ static void sriov_disable(struct pci_dev *dev) sriov_del_vfs(dev); iov->ctrl &= ~(PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE); + if (iov->ctrl & PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN) + iov->ctrl &= ~PCI_SRIOV_CTRL_VF_10BIT_TAG_REQ_EN; pci_cfg_access_lock(dev); pci_write_config_word(dev, iov->pos + PCI_SRIOV_CTRL, iov->ctrl); ssleep(1);