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Tsirkin" , Cindy Lu , Jason Wang Subject: [RFC PATCH v9 19/23] vdpa: Extract get features part from vhost_vdpa_get_max_queue_pairs Date: Wed, 6 Jul 2022 20:40:04 +0200 Message-Id: <20220706184008.1649478-20-eperezma@redhat.com> In-Reply-To: <20220706184008.1649478-1-eperezma@redhat.com> References: <20220706184008.1649478-1-eperezma@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 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_NONE=-0.0001, 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1657134080090100001 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 P=C3=A9rez Acked-by: Jason Wang --- 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 df1e69ee72..b0158f625e 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -219,20 +219,24 @@ static NetClientState *net_vhost_vdpa_init(NetClientS= tate *peer, return nc; } =20 -static int vhost_vdpa_get_max_queue_pairs(int fd, int *has_cvq, Error **er= rp) +static int vhost_vdpa_get_features(int fd, uint64_t *features, Error **err= p) +{ + int ret =3D 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 =3D offsetof(struct vhost_vdpa_config, buf); g_autofree struct vhost_vdpa_config *config =3D NULL; __virtio16 *max_queue_pairs; - uint64_t features; int ret; =20 - ret =3D 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 =3D 1; } else { @@ -262,10 +266,11 @@ int net_init_vhost_vdpa(const Netdev *netdev, const c= har *name, NetClientState *peer, Error **errp) { const NetdevVhostVDPAOptions *opts; + uint64_t features; int vdpa_device_fd; g_autofree NetClientState **ncs =3D NULL; NetClientState *nc; - int queue_pairs, i, has_cvq =3D 0; + int queue_pairs, r, i, has_cvq =3D 0; =20 assert(netdev->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); opts =3D &netdev->u.vhost_vdpa; @@ -279,7 +284,12 @@ int net_init_vhost_vdpa(const Netdev *netdev, const ch= ar *name, return -errno; } =20 - queue_pairs =3D vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, + r =3D vhost_vdpa_get_features(vdpa_device_fd, &features, errp); + if (r) { + return r; + } + + queue_pairs =3D vhost_vdpa_get_max_queue_pairs(vdpa_device_fd, feature= s, &has_cvq, errp); if (queue_pairs < 0) { qemu_close(vdpa_device_fd); --=20 2.31.1