From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by dpdk.org (Postfix) with ESMTP id D7FB8DD2 for ; Thu, 5 Apr 2018 12:10:58 +0200 (CEST) Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7DA5D77067; Thu, 5 Apr 2018 10:10:58 +0000 (UTC) Received: from localhost (dhcp-192-241.str.redhat.com [10.33.192.241]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 588B61208F7F; Thu, 5 Apr 2018 10:10:51 +0000 (UTC) From: Jens Freimann To: dev@dpdk.org Cc: tiwei.bie@intel.com, yliu@fridaylinux.org, maxime.coquelin@redhat.com, mst@redhat.com Date: Thu, 5 Apr 2018 12:10:14 +0200 Message-Id: <20180405101031.26468-5-jfreimann@redhat.com> In-Reply-To: <20180405101031.26468-1-jfreimann@redhat.com> References: <20180405101031.26468-1-jfreimann@redhat.com> X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 05 Apr 2018 10:10:58 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.1]); Thu, 05 Apr 2018 10:10:58 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'jfreimann@redhat.com' RCPT:'' Subject: [dpdk-dev] [PATCH v3 04/21] net/virtio: add packed virtqueue helpers 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: Thu, 05 Apr 2018 10:10:59 -0000 Add helper functions to set/clear and check descriptor flags. Signed-off-by: Jens Freimann --- drivers/net/virtio/virtio_ring.h | 33 +++++++++++++++++++++++++++++++++ drivers/net/virtio/virtqueue.c | 10 ++++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/net/virtio/virtio_ring.h b/drivers/net/virtio/virtio_ring.h index 54a11d2a9..663b4b01d 100644 --- a/drivers/net/virtio/virtio_ring.h +++ b/drivers/net/virtio/virtio_ring.h @@ -78,6 +78,7 @@ struct vring_packed_desc_event { struct vring { unsigned int num; + unsigned int avail_wrap_counter; union { struct vring_desc_packed *desc_packed; struct vring_desc *desc; @@ -92,6 +93,38 @@ struct vring { }; }; +static inline void toggle_wrap_counter(struct vring *vr) +{ + vr->avail_wrap_counter ^= 1; +} + +static inline void _set_desc_avail(struct vring_desc_packed *desc, + int wrap_counter) +{ + uint16_t flags = desc->flags; + + if (wrap_counter) { + flags |= VRING_DESC_F_AVAIL; + flags &= ~VRING_DESC_F_USED; + } else { + flags &= ~VRING_DESC_F_AVAIL; + flags |= VRING_DESC_F_USED; + } + + desc->flags = flags; +} + +static inline void set_desc_avail(struct vring *vr, + struct vring_desc_packed *desc) +{ + _set_desc_avail(desc, vr->avail_wrap_counter); +} + +static inline int desc_is_used(struct vring_desc_packed *desc) +{ + return !(desc->flags & VRING_DESC_F_AVAIL) == !(desc->flags & VRING_DESC_F_USED); +} + /* The standard layout for the ring is a continuous chunk of memory which * looks like this. We assume num is a power of 2. * diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c index a7d0a9cbe..4f95ed5c8 100644 --- a/drivers/net/virtio/virtqueue.c +++ b/drivers/net/virtio/virtqueue.c @@ -58,6 +58,7 @@ 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; @@ -65,6 +66,15 @@ virtqueue_rxvq_flush(struct virtqueue *vq) uint16_t used_idx, desc_idx; uint16_t nb_used, i; + if (vtpci_packed_queue(vq->hw)) { + i = vq->vq_used_cons_idx & (vq->vq_nentries - 1); + while (desc_is_used(&descs[i])) { + rte_pktmbuf_free(vq->sw_ring[i]); + vq->vq_free_cnt++; + } + return; + } + nb_used = VIRTQUEUE_NUSED(vq); for (i = 0; i < nb_used; i++) { -- 2.14.3