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 B6DE3A2E1B for ; Tue, 3 Sep 2019 09:30:41 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 81BCC1E8EE; Tue, 3 Sep 2019 09:30:41 +0200 (CEST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 3B4FC1C440; Tue, 3 Sep 2019 09:30:39 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 896C334CC; Tue, 3 Sep 2019 07:30:38 +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 A9EE05C1B5; Tue, 3 Sep 2019 07:30:22 +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> <20190829080000.20806-12-maxime.coquelin@redhat.com> <20190902070731.GA16025@___> 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: <20190902070731.GA16025@___> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Tue, 03 Sep 2019 07:30:38 +0000 (UTC) Subject: Re: [dpdk-dev] [PATCH 11/15] net/virtio: add vDPA op to stop and close the device 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 9:07 AM, Tiwei Bie wrote: > On Thu, Aug 29, 2019 at 09:59:56AM +0200, Maxime Coquelin wrote: >> This patch implements the vDPA .dev_close() callback. >> >> Signed-off-by: Maxime Coquelin >> --- >> drivers/net/virtio/virtio_vdpa.c | 52 ++++++++++++++++++++++++++++++++ >> 1 file changed, 52 insertions(+) >> >> diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c >> index 13b4dd07d..691844906 100644 >> --- a/drivers/net/virtio/virtio_vdpa.c >> +++ b/drivers/net/virtio/virtio_vdpa.c >> @@ -436,6 +436,33 @@ virtio_vdpa_start(struct virtio_vdpa_device *dev) >> return ret; >> } >> >> +static void >> +virtio_vdpa_stop(struct virtio_vdpa_device *dev) >> +{ >> + struct virtio_hw *hw = &dev->hw; >> + uint32_t i, nr_vring; >> + int vid = dev->vid; >> + struct rte_vhost_vring vr; >> + uint16_t last_used_idx, last_avail_idx; >> + >> + nr_vring = rte_vhost_get_vring_num(vid); >> + >> + vtpci_reset(hw); >> + >> + for (i = 0; i < nr_vring; i++) { >> + rte_vhost_get_vhost_vring(vid, i, &vr); >> + >> + last_used_idx = vr.used->idx; >> + last_avail_idx = vr.avail->idx; > > This only works in split ring. Right, thanks for spotting it. For the v2, I'll try to fix it and test it with Jason's Qemu series adding packed ring support. > Regards, > Tiwei > >> + >> + rte_vhost_set_vring_base(vid, i, last_avail_idx, >> + last_used_idx); >> + } >> + >> + rte_free(dev->vqs); >> + dev->vqs = NULL; >> +} >> +