From patchwork Wed Mar 10 09:00:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhu Lingshan X-Patchwork-Id: 397249 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=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, 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 32B1CC4321A for ; Wed, 10 Mar 2021 09:07:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E161D64FF2 for ; Wed, 10 Mar 2021 09:07:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232617AbhCJJGo (ORCPT ); Wed, 10 Mar 2021 04:06:44 -0500 Received: from mga03.intel.com ([134.134.136.65]:64352 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232542AbhCJJGO (ORCPT ); Wed, 10 Mar 2021 04:06:14 -0500 IronPort-SDR: 6VgsXd8xKP7d9FNf00l2QcCjt2Xck6HKqqo1HT3raszh/hDL6wvCAYnhQ3Y1c95CW6HFAo45GL /p/53/tuMBEw== X-IronPort-AV: E=McAfee;i="6000,8403,9917"; a="188461285" X-IronPort-AV: E=Sophos;i="5.81,237,1610438400"; d="scan'208";a="188461285" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Mar 2021 01:06:14 -0800 IronPort-SDR: xeiNNktw/+/z1UwBtI6ZaHuAnhYzyFTnnpCiqbsPqGSGrnCQnApME5xw5DdSjgZgyG5ygifa1K Jm+c2Uxx9s3g== X-IronPort-AV: E=Sophos;i="5.81,237,1610438400"; d="scan'208";a="410110478" 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; 10 Mar 2021 01:06:11 -0800 From: Zhu Lingshan To: jasowang@redhat.com, mst@redhat.com, lulu@redhat.com, leonro@nvidia.com Cc: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Zhu Lingshan Subject: [PATCH V3 5/6] vDPA/ifcvf: fetch device feature bits when probe Date: Wed, 10 Mar 2021 17:00:51 +0800 Message-Id: <20210310090052.4762-6-lingshan.zhu@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210310090052.4762-1-lingshan.zhu@intel.com> References: <20210310090052.4762-1-lingshan.zhu@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This commit would read and store device feature bits when probe. rename ifcvf_get_features() to ifcvf_get_hw_features(), it reads and stores features of the probed device. new ifcvf_get_features() simply returns stored feature bits. Signed-off-by: Zhu Lingshan --- drivers/vdpa/ifcvf/ifcvf_base.c | 12 ++++++++++-- drivers/vdpa/ifcvf/ifcvf_base.h | 2 ++ drivers/vdpa/ifcvf/ifcvf_main.c | 2 ++ 3 files changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c index f2a128e56de5..ea6a78791c9b 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.c +++ b/drivers/vdpa/ifcvf/ifcvf_base.c @@ -202,10 +202,11 @@ static void ifcvf_add_status(struct ifcvf_hw *hw, u8 status) ifcvf_get_status(hw); } -u64 ifcvf_get_features(struct ifcvf_hw *hw) +u64 ifcvf_get_hw_features(struct ifcvf_hw *hw) { struct virtio_pci_common_cfg __iomem *cfg = hw->common_cfg; u32 features_lo, features_hi; + u64 features; ifc_iowrite32(0, &cfg->device_feature_select); features_lo = ifc_ioread32(&cfg->device_feature); @@ -213,7 +214,14 @@ u64 ifcvf_get_features(struct ifcvf_hw *hw) ifc_iowrite32(1, &cfg->device_feature_select); features_hi = ifc_ioread32(&cfg->device_feature); - return ((u64)features_hi << 32) | features_lo; + features = ((u64)features_hi << 32) | features_lo; + + return features; +} + +u64 ifcvf_get_features(struct ifcvf_hw *hw) +{ + return hw->hw_features; } void ifcvf_read_net_config(struct ifcvf_hw *hw, u64 offset, diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h index 794d1505d857..dbb8c10aa3b1 100644 --- a/drivers/vdpa/ifcvf/ifcvf_base.h +++ b/drivers/vdpa/ifcvf/ifcvf_base.h @@ -83,6 +83,7 @@ struct ifcvf_hw { void __iomem *notify_base; u32 notify_off_multiplier; u64 req_features; + u64 hw_features; struct virtio_pci_common_cfg __iomem *common_cfg; void __iomem *net_cfg; struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2]; @@ -121,6 +122,7 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 status); void io_write64_twopart(u64 val, u32 *lo, u32 *hi); void ifcvf_reset(struct ifcvf_hw *hw); u64 ifcvf_get_features(struct ifcvf_hw *hw); +u64 ifcvf_get_hw_features(struct ifcvf_hw *hw); u16 ifcvf_get_vq_state(struct ifcvf_hw *hw, u16 qid); int ifcvf_set_vq_state(struct ifcvf_hw *hw, u16 qid, u16 num); struct ifcvf_adapter *vf_to_adapter(struct ifcvf_hw *hw); diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c index c34e1eec6b6c..25fb9dfe23f0 100644 --- a/drivers/vdpa/ifcvf/ifcvf_main.c +++ b/drivers/vdpa/ifcvf/ifcvf_main.c @@ -458,6 +458,8 @@ static int ifcvf_probe(struct pci_dev *pdev, const struct pci_device_id *id) for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) vf->vring[i].irq = -EINVAL; + vf->hw_features = ifcvf_get_hw_features(vf); + ret = vdpa_register_device(&adapter->vdpa); if (ret) { IFCVF_ERR(pdev, "Failed to register ifcvf to vdpa bus");