From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id C0A094F94 for ; Fri, 21 Sep 2018 12:33:51 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 36CF888E63; Fri, 21 Sep 2018 10:33:51 +0000 (UTC) Received: from localhost (dhcp-192-209.str.redhat.com [10.33.192.209]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 39529106A788; Fri, 21 Sep 2018 10:33:44 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, maxime.coquelin@redhat.com, Gavin.Hu@arm.com Date: Fri, 21 Sep 2018 12:33:01 +0200 Message-Id: <20180921103308.16357-5-jfreimann@redhat.com> In-Reply-To: <20180921103308.16357-1-jfreimann@redhat.com> References: <20180921103308.16357-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Fri, 21 Sep 2018 10:33:51 +0000 (UTC) Subject: [dpdk-dev] [PATCH v6 04/11] net/virtio: flush packed receive virtqueues 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: , X-List-Received-Date: Fri, 21 Sep 2018 10:33:52 -0000 Flush used descriptors in packed receive virtqueue. As descriptors can be chained we need to look at the stored number of used descriptors to find out the length of the chain. Signed-off-by: Jens Freimann --- drivers/net/virtio/virtqueue.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c index 56a77cc71..46dd9de52 100644 --- a/drivers/net/virtio/virtqueue.c +++ b/drivers/net/virtio/virtqueue.c @@ -58,12 +58,33 @@ virtqueue_detach_unused(struct virtqueue *vq) void virtqueue_rxvq_flush(struct virtqueue *vq) { + struct vring_desc_packed *descs = vq->vq_ring.desc_packed; struct virtnet_rx *rxq = &vq->rxq; struct virtio_hw *hw = vq->hw; struct vring_used_elem *uep; struct vq_desc_extra *dxp; uint16_t used_idx, desc_idx; uint16_t nb_used, i; + uint16_t size = vq->vq_nentries; + + if (vtpci_packed_queue(vq->hw)) { + i = vq->vq_used_cons_idx; + if (i >= vq->vq_used_cons_idx) { + PMD_INIT_LOG(ERR, "vq_used_cons_idx out of range"); + return; + } + while (desc_is_used(&descs[i], &vq->vq_ring) && + i < vq->vq_nentries) { + dxp = &vq->vq_descx[i]; + if (dxp->cookie != NULL) + rte_pktmbuf_free(dxp->cookie); + vq->vq_free_cnt += dxp->ndescs; + i = i + dxp->ndescs; + i = i >= size ? i - size : i; + dxp->ndescs = 0; + } + return; + } nb_used = VIRTQUEUE_NUSED(vq); -- 2.17.1