From patchwork Thu Apr 15 09:53:34 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhu, Lingshan" X-Patchwork-Id: 12204905 X-Patchwork-Delegate: kuba@kernel.org 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=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 16202C43461 for ; Thu, 15 Apr 2021 09:59:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E68B5611AD for ; Thu, 15 Apr 2021 09:59:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232268AbhDOJ7Z (ORCPT ); Thu, 15 Apr 2021 05:59:25 -0400 Received: from mga12.intel.com ([192.55.52.136]:65315 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232209AbhDOJ7V (ORCPT ); Thu, 15 Apr 2021 05:59:21 -0400 IronPort-SDR: 02Pu6UObZ4W7jcFAMAOMKJnmm2dT3uIhRf6ND3m0Wtb55tmDr39KueYMMGRIZVBJi2apqOrWfQ Pwmx5BbR7+AA== X-IronPort-AV: E=McAfee;i="6200,9189,9954"; a="174321437" X-IronPort-AV: E=Sophos;i="5.82,223,1613462400"; d="scan'208";a="174321437" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2021 02:58:58 -0700 IronPort-SDR: CP+XLAt/ruZ66tZse0MNcHsH47xkIq3kJARn797CqkxKU3olf7A0lK2aDf5p2n8l+sZPgJFCvE T7e8r81qOsdA== X-IronPort-AV: E=Sophos;i="5.82,223,1613462400"; d="scan'208";a="425123454" Received: from unknown (HELO localhost.localdomain.bj.intel.com) ([10.240.193.73]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Apr 2021 02:58:56 -0700 From: Zhu Lingshan To: jasowang@redhat.com, mst@redhat.com, lulu@redhat.com, sgarzare@redhat.com Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Zhu Lingshan Subject: [PATCH V2 1/3] vDPA/ifcvf: deduce VIRTIO device ID when probe Date: Thu, 15 Apr 2021 17:53:34 +0800 Message-Id: <20210415095336.4792-2-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210415095336.4792-1-lingshan.zhu@intel.com> References: <20210415095336.4792-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This commit deduces VIRTIO device ID as device type when probe, then ifcvf_vdpa_get_device_id() can simply return the ID. ifcvf_vdpa_get_features() and ifcvf_vdpa_get_config_size() can work properly based on the device ID. Signed-off-by: Zhu Lingshan --- drivers/vdpa/ifcvf/ifcvf_base.h | 1 + drivers/vdpa/ifcvf/ifcvf_main.c | 30 ++++++++++++++++++------------ 2 files changed, 19 insertions(+), 12 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h index b2eeb16b9c2c..1c04cd256fa7 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.h +++ b/drivers/vdpa/ifcvf/ifcvf_base.h @@ -84,6 +84,7 @@ struct ifcvf_hw { u32 notify_off_multiplier; u64 req_features; u64 hw_features; + u32 dev_type; struct virtio_pci_common_cfg __iomem *common_cfg; void __iomem *net_cfg; struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2]; diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index 44d7586019da..469a9b5737b7 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -323,19 +323,9 @@ static u32 ifcvf_vdpa_get_generation(struct vdpa_device *vdpa_dev) static u32 ifcvf_vdpa_get_device_id(struct vdpa_device *vdpa_dev) { - struct ifcvf_adapter *adapter = vdpa_to_adapter(vdpa_dev); - struct pci_dev *pdev = adapter->pdev; - u32 ret = -ENODEV; - - if (pdev->device < 0x1000 || pdev->device > 0x107f) - return ret; - - if (pdev->device < 0x1040) - ret = pdev->subsystem_device; - else - ret = pdev->device - 0x1040; + struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev); - return ret; + return vf->dev_type; } static u32 ifcvf_vdpa_get_vendor_id(struct vdpa_device *vdpa_dev) @@ -466,6 +456,22 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) pci_set_drvdata(pdev, adapter); vf = &adapter->vf; + + /* This drirver drives both modern virtio devices and transitional + * devices in modern mode. + * vDPA requires feature bit VIRTIO_F_ACCESS_PLATFORM, + * so legacy devices and transitional devices in legacy + * mode will not work for vDPA, this driver will not + * drive devices with legacy interface. + */ + if (pdev->device < 0x1000 || pdev->device > 0x107f) + return -EOPNOTSUPP; + + if (pdev->device < 0x1040) + vf->dev_type = pdev->subsystem_device; + else + vf->dev_type = pdev->device - 0x1040; + vf->base = pcim_iomap_table(pdev); adapter->pdev = pdev;