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=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AC081C19437 for ; Fri, 4 Dec 2020 04:06:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7AEA7223D6 for ; Fri, 4 Dec 2020 04:06:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728120AbgLDEGD (ORCPT ); Thu, 3 Dec 2020 23:06:03 -0500 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:54879 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726912AbgLDEGC (ORCPT ); Thu, 3 Dec 2020 23:06:02 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1607054676; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=beqiSug2CHYTN1W6nggpEpwUBNclSVEckxreRjbzJ6U=; b=h/Jb4vLWxUf0MZ//LWTCgJQXjq7fkdSRh55I6AgTTEj2uo2cHLG2ezABzjEH5nksTrQhKp sfn3dXAe8uYxJM1ydjz6r/4qWxvCBsI0CMyS8y48vUgY7FpdGdLPDw8NOwWcmB1UqaFYUU pnubA267SOOupLXjubE/3snnbAJzEDQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-66-g4YHjhLIPSaToIruBRsEhA-1; Thu, 03 Dec 2020 23:04:34 -0500 X-MC-Unique: g4YHjhLIPSaToIruBRsEhA-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id B7EDD80EF82; Fri, 4 Dec 2020 04:04:33 +0000 (UTC) Received: from jason-ThinkPad-X1-Carbon-6th.redhat.com (ovpn-12-116.pek2.redhat.com [10.72.12.116]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8F2F31A4D0; Fri, 4 Dec 2020 04:04:31 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org Cc: shahafs@mellanox.com Subject: [PATCH V2 09/19] virtio-pci-modern: introduce vp_modern_set_queue_vector() Date: Fri, 4 Dec 2020 12:03:43 +0800 Message-Id: <20201204040353.21679-10-jasowang@redhat.com> In-Reply-To: <20201204040353.21679-1-jasowang@redhat.com> References: <20201204040353.21679-1-jasowang@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch introduces a helper to set virtqueue MSI vector. Signed-off-by: Jason Wang --- drivers/virtio/virtio_pci_modern.c | 35 ++++++++++++++++++++---------- 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c index a128e5814045..05cd409c0731 100644 --- a/drivers/virtio/virtio_pci_modern.c +++ b/drivers/virtio/virtio_pci_modern.c @@ -191,6 +191,25 @@ static void vp_modern_set_features(struct virtio_pci_modern_device *mdev, vp_iowrite32(features >> 32, &cfg->guest_feature); } +/* + * vp_modern_queue_vector - set the MSIX vector for a specific virtqueue + * @mdev: the modern virtio-pci device + * @index: queue index + * @vector: the config vector + * + * Returns the config vector read from the device + */ +static u16 vp_modern_queue_vector(struct virtio_pci_modern_device *mdev, + u16 index, u16 vector) +{ + struct virtio_pci_common_cfg __iomem *cfg = mdev->common; + + vp_iowrite16(index, &cfg->queue_select); + vp_iowrite16(vector, &cfg->queue_msix_vector); + /* Flush the write out to device */ + return vp_ioread16(&cfg->queue_msix_vector); +} + /* virtio config->finalize_features() implementation */ static int vp_finalize_features(struct virtio_device *vdev) { @@ -474,8 +493,7 @@ static struct virtqueue *setup_vq(struct virtio_pci_device *vp_dev, } if (msix_vec != VIRTIO_MSI_NO_VECTOR) { - vp_iowrite16(msix_vec, &cfg->queue_msix_vector); - msix_vec = vp_ioread16(&cfg->queue_msix_vector); + msix_vec = vp_modern_queue_vector(mdev, index, msix_vec); if (msix_vec == VIRTIO_MSI_NO_VECTOR) { err = -EBUSY; goto err_assign_vector; @@ -522,17 +540,10 @@ static void del_vq(struct virtio_pci_vq_info *info) struct virtqueue *vq = info->vq; struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); struct virtio_pci_modern_device *mdev = &vp_dev->mdev; - struct virtio_pci_common_cfg __iomem *cfg = mdev->common; - - vp_iowrite16(vq->index, &cfg->queue_select); - - if (vp_dev->msix_enabled) { - vp_iowrite16(VIRTIO_MSI_NO_VECTOR, - &cfg->queue_msix_vector); - /* Flush the write out to device */ - vp_ioread16(&cfg->queue_msix_vector); - } + if (vp_dev->msix_enabled) + vp_modern_queue_vector(mdev, vq->index, + VIRTIO_MSI_NO_VECTOR); if (!mdev->notify_base) pci_iounmap(mdev->pci_dev, (void __force __iomem *)vq->priv); -- 2.25.1