From patchwork Wed Jun 2 02:15:36 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 12292657 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=-16.1 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, URIBL_BLOCKED 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 D61AAC47080 for ; Wed, 2 Jun 2021 02:16:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BD9FD613D3 for ; Wed, 2 Jun 2021 02:16:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230256AbhFBCRp (ORCPT ); Tue, 1 Jun 2021 22:17:45 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:45713 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230403AbhFBCRl (ORCPT ); Tue, 1 Jun 2021 22:17:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1622600159; 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=0N48jdl0LC6EEeO/MPQo8KIfakfiafpunndtsq1f0hA=; b=Qj3X5G99sD4uzupUG8gHBPquaf9dzGaARDF4yYPCTujV4oTL+HBwLjMVxvJJflgvmDdr6u OwPauA5JUfqkMzGeM50L0Sctu6EVt53jsL8QWd+64LyArPciGbo/hGxpQ2XXN3sHA+A1HN jl1CKwEuO093u5VSGVuXYWYds1fAjSQ= 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-443-ew0GSzEyOyeLmFpa9-ZpvQ-1; Tue, 01 Jun 2021 22:15:57 -0400 X-MC-Unique: ew0GSzEyOyeLmFpa9-ZpvQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6401D801817; Wed, 2 Jun 2021 02:15:56 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-99.pek2.redhat.com [10.72.12.99]) by smtp.corp.redhat.com (Postfix) with ESMTP id C553D60CD1; Wed, 2 Jun 2021 02:15:53 +0000 (UTC) From: Jason Wang To: mst@redhat.com, jasowang@redhat.com, virtualization@lists.linux-foundation.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, netdev@vger.kernel.org Cc: eli@mellanox.com, Eli Cohen Subject: [PATCH V2 RESEND 4/4] virtio/vdpa: clear the virtqueue state during probe Date: Wed, 2 Jun 2021 10:15:36 +0800 Message-Id: <20210602021536.39525-5-jasowang@redhat.com> In-Reply-To: <20210602021536.39525-1-jasowang@redhat.com> References: <20210602021536.39525-1-jasowang@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Eli Cohen Clear the available index as part of the initialization process to clear and values that might be left from previous usage of the device. For example, if the device was previously used by vhost_vdpa and now probed by vhost_vdpa, you want to start with indices. Fixes: c043b4a8cf3b ("virtio: introduce a vDPA based transport") Signed-off-by: Eli Cohen Signed-off-by: Jason Wang Reviewed-by: Eli Cohen --- drivers/virtio/virtio_vdpa.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c index e28acf482e0c..e1a141135992 100644 --- a/drivers/virtio/virtio_vdpa.c +++ b/drivers/virtio/virtio_vdpa.c @@ -142,6 +142,8 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, struct vdpa_callback cb; struct virtqueue *vq; u64 desc_addr, driver_addr, device_addr; + /* Assume split virtqueue, switch to packed if necessary */ + struct vdpa_vq_state state = {0}; unsigned long flags; u32 align, num; int err; @@ -191,6 +193,19 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index, goto err_vq; } + /* reset virtqueue state index */ + if (virtio_has_feature(vdev, VIRTIO_F_RING_PACKED)) { + struct vdpa_vq_state_packed *s = &state.packed; + + s->last_avail_counter = 1; + s->last_avail_idx = 0; + s->last_used_counter = 1; + s->last_used_idx = 0; + } + err = ops->set_vq_state(vdpa, index, &state); + if (err) + goto err_vq; + ops->set_vq_ready(vdpa, index, 1); vq->priv = info;