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 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 69988C433F5 for ; Thu, 19 May 2022 19:35:24 +0000 (UTC) Received: from localhost ([::1]:38920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nrlvf-0006JM-Cj for qemu-devel@archiver.kernel.org; Thu, 19 May 2022 15:35:23 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48278) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nrlb7-0005hJ-2T for qemu-devel@nongnu.org; Thu, 19 May 2022 15:14:10 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:37437) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nrlb5-0006Rw-GH for qemu-devel@nongnu.org; Thu, 19 May 2022 15:14:08 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652987646; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nlQj9ven0tTwwma+r2eSKJXu7pWJULNx+q8yt8E1T1w=; b=Uek1AdhuNEbeNhyiEIMtHdR0eoUMoqWlpL9UlVA600Sve4O4lTCE+8Y7NkuXg5/CJnu5Kg XCPVWogk7FPpqGDyw+mrmV3H9N6WqGeblrRUf7mn+5DjLFUE+Sh7eF0tREblqcz5MoIiRF O8/OW/elTaQWP/vPqs5SQAmmG6MyLEk= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-668-708pikefPPavigekIvV0xQ-1; Thu, 19 May 2022 15:14:03 -0400 X-MC-Unique: 708pikefPPavigekIvV0xQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E8C873C138BC; Thu, 19 May 2022 19:14:02 +0000 (UTC) Received: from eperezma.remote.csb (unknown [10.39.193.126]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5873A2026D6A; Thu, 19 May 2022 19:14:00 +0000 (UTC) From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Cc: Gautam Dawar , "Michael S. Tsirkin" , Markus Armbruster , "Gonglei (Arei)" , Harpreet Singh Anand , Cornelia Huck , Zhu Lingshan , Laurent Vivier , Eli Cohen , Paolo Bonzini , Liuxiangdong , Eric Blake , Cindy Lu , Jason Wang , Parav Pandit Subject: [RFC PATCH v8 18/21] vdpa: Extract get features part from vhost_vdpa_get_max_queue_pairs Date: Thu, 19 May 2022 21:13:03 +0200 Message-Id: <20220519191306.821774-19-eperezma@redhat.com> In-Reply-To: <20220519191306.821774-1-eperezma@redhat.com> References: <20220519191306.821774-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" To know the device features is needed for CVQ SVQ, so SVQ knows if it can handle all commands or not. Extract from vhost_vdpa_get_max_queue_pairs so we can reuse it. Signed-off-by: Eugenio Pérez --- net/vhost-vdpa.c | 30 ++++++++++++++++++++---------- 1 file changed, 20 insertions(+), 10 deletions(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index a66f73ff63..8960b8db74 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -325,20 +325,24 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer, return nc; } -static int vhost_vdpa_get_max_queue_pairs(int fd, int *has_cvq, Error **errp) +static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **errp) +{ + int ret = ioctl(fd, VHOST_GET_FEATURES, features); + if (ret) { + error_setg_errno(errp, errno, + "Fail to query features from vhost-vDPA device"); + } + return ret; +} + +static int vhost_vdpa_get_max_queue_pairs(int fd, uint64_t features, + int *has_cvq, Error **errp) { unsigned long config_size = offsetof(struct vhost_vdpa_config, buf); g_autofree struct vhost_vdpa_config *config = NULL; __virtio16 *max_queue_pairs; - uint64_t features; int ret; - ret = ioctl(fd, VHOST_GET_FEATURES, &features); - if (ret) { - error_setg(errp, "Fail to query features from vhost-vDPA device"); - return ret; - } - if (features & (1 << VIRTIO_NET_F_CTRL_VQ)) { *has_cvq = 1; } else { @@ -368,10 +372,11 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, NetClientState *peer, Error **errp) { const NetdevVhostVDPAOptions *opts; + uint64_t features; int vdpa_device_fd; g_autofree NetClientState **ncs = NULL; NetClientState *nc; - int queue_pairs, i, has_cvq = 0; + int queue_pairs, r, i, has_cvq = 0; assert(netdev->type == NET_CLIENT_DRIVER_VHOST_VDPA); opts = &netdev->u.vhost_vdpa; @@ -385,7 +390,12 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name, return -errno; } - queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, + r = vhost_vdpa_get_features(vdpa_device_fd, &features, errp); + if (r) { + return r; + } + + queue_pairs = vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, features, &has_cvq, errp); if (queue_pairs < 0) { qemu_close(vdpa_device_fd); -- 2.27.0