From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 7F501A2E1B for ; Tue, 3 Sep 2019 09:27:47 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 4B91E1C43A; Tue, 3 Sep 2019 09:27:47 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 7D1C21E870; Tue, 3 Sep 2019 09:27:45 +0200 (CEST) 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 mx1.redhat.com (Postfix) with ESMTPS id EADC218B3D84; Tue, 3 Sep 2019 07:27:44 +0000 (UTC) Received: from [10.36.112.25] (ovpn-112-25.ams2.redhat.com [10.36.112.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 34D8C6092D; Tue, 3 Sep 2019 07:27:40 +0000 (UTC) To: Tiwei Bie Cc: zhihong.wang@intel.com, amorenoz@redhat.com, xiao.w.wang@intel.com, dev@dpdk.org, jfreimann@redhat.com, stable@dpdk.org References: <20190829080000.20806-1-maxime.coquelin@redhat.com> <20190829080000.20806-9-maxime.coquelin@redhat.com> <20190902064340.GA15111@___> From: Maxime Coquelin Openpgp: preference=signencrypt Autocrypt: addr=maxime.coquelin@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20190902064340.GA15111@___> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.63]); Tue, 03 Sep 2019 07:27:45 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH 08/15] net/virtio: add virtio vDPA op to get features X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 9/2/19 8:43 AM, Tiwei Bie wrote: > On Thu, Aug 29, 2019 at 09:59:53AM +0200, Maxime Coquelin wrote: >> This patch implements the vDPA .get_features() callback. >> >> Signed-off-by: Maxime Coquelin >> --- >> drivers/net/virtio/virtio_vdpa.c | 32 ++++++++++++++++++++++++++++++++ >> 1 file changed, 32 insertions(+) >> >> diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c >> index 07ff1e090..9e2af8313 100644 >> --- a/drivers/net/virtio/virtio_vdpa.c >> +++ b/drivers/net/virtio/virtio_vdpa.c >> @@ -173,8 +173,40 @@ virtio_vdpa_get_queue_num(int did, uint32_t *queue_num) >> return 0; >> } >> >> +static int >> +virtio_vdpa_get_features(int did, uint64_t *features) >> +{ >> + struct internal_list *list; >> + struct virtio_vdpa_device *dev; >> + >> + list = find_internal_resource_by_did(did); >> + if (list == NULL) { >> + DRV_LOG(ERR, "Invalid device id: %d", did); >> + return -1; >> + } >> + >> + dev = list->dev; >> + >> + *features = VTPCI_OPS(&dev->hw)->get_features(&dev->hw); >> + >> + if (!(*features & (1ULL << VIRTIO_F_IOMMU_PLATFORM))) { >> + DRV_LOG(ERR, "Device does not support IOMMU"); >> + return -1; >> + } >> + >> + if (*features & (1ULL << VIRTIO_NET_F_CTRL_VQ)) >> + dev->has_ctrl_vq = true; >> + else >> + dev->has_ctrl_vq = false; >> + >> + *features |= (1ULL << VHOST_USER_F_PROTOCOL_FEATURES); > > We need to drop the VIRTIO_F_IOMMU_PLATFORM bit before > reporting features to the upper layer as the vDPA backend > doesn't support the vIOMMU yet. Indeed, it just work for now because Virtio-user does not advertise IOMMU feature. > Regards, > Tiwei > > >> + >> + return 0; >> +} >> + >> static struct rte_vdpa_dev_ops virtio_vdpa_ops = { >> .get_queue_num = virtio_vdpa_get_queue_num, >> + .get_features = virtio_vdpa_get_features, >> }; >> >> static inline int >> -- >> 2.21.0 >>