From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mails.dpdk.org (mails.dpdk.org [217.70.189.124]) by inbox.dpdk.org (Postfix) with ESMTP id 45AD6A0C43; Mon, 18 Oct 2021 15:04:58 +0200 (CEST) Received: from [217.70.189.124] (localhost [127.0.0.1]) by mails.dpdk.org (Postfix) with ESMTP id EFC27410F4; Mon, 18 Oct 2021 15:04:35 +0200 (CEST) Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by mails.dpdk.org (Postfix) with ESMTP id C4E08410F4 for ; Mon, 18 Oct 2021 15:04:34 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1634562274; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=We4IZQkHzACEpX6BcLuOKCaqfWFQWJRjc4koQzJnR/c=; b=PrJswl5bmAeO7UmL90xiab78xQ95lzCzZ29yK4h8BZ3aKAaWl+qvSOaN5JMFJY9B54s3+I 3BqcqDO3KvTQy/NCULXDdFlEQ4rUr/aXfWteVEuOd3fwFy3yKvUZXcYpsRWR96++oDGLts vK7L0XeuCrT4apr91DbZbO/EBIS9xkY= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-596-t_VMXhe0O4GBev7FF3C3kw-1; Mon, 18 Oct 2021 09:04:30 -0400 X-MC-Unique: t_VMXhe0O4GBev7FF3C3kw-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A353310055BF; Mon, 18 Oct 2021 13:04:27 +0000 (UTC) Received: from max-t490s.redhat.com (unknown [10.39.208.22]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8505060BD8; Mon, 18 Oct 2021 13:04:25 +0000 (UTC) From: Maxime Coquelin To: dev@dpdk.org, chenbo.xia@intel.com, jiayu.hu@intel.com, yuanx.wang@intel.com, wenwux.ma@intel.com, bruce.richardson@intel.com, john.mcnamara@intel.com, david.marchand@redhat.com Cc: Maxime Coquelin Date: Mon, 18 Oct 2021 15:02:29 +0200 Message-Id: <20211018130229.308694-15-maxime.coquelin@redhat.com> In-Reply-To: <20211018130229.308694-1-maxime.coquelin@redhat.com> References: <20211018130229.308694-1-maxime.coquelin@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=maxime.coquelin@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="US-ASCII" Subject: [dpdk-dev] [PATCH v1 14/14] vhost: merge sync and async mbuf to desc filling X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 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" This patches merges copy_mbuf_to_desc() used by the sync path with async_mbuf_to_desc() used by the async path. Most of these complex functions are identical, so merging them will make the maintenance easier. In order not to degrade performance, the patch introduces a boolean function parameter to specify whether it is called in async context. This boolean is statically passed to this always-inlined function, so the compiler will optimize this out. Signed-off-by: Maxime Coquelin --- lib/vhost/virtio_net.c | 153 +++++++---------------------------------- 1 file changed, 26 insertions(+), 127 deletions(-) diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c index 7e66113006..0e1fd01e31 100644 --- a/lib/vhost/virtio_net.c +++ b/lib/vhost/virtio_net.c @@ -913,9 +913,9 @@ sync_mbuf_to_desc_seg(struct virtio_net *dev, struct vhost_virtqueue *vq, } static __rte_always_inline int -copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, - struct rte_mbuf *m, struct buf_vector *buf_vec, - uint16_t nr_vec, uint16_t num_buffers) +mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, + struct rte_mbuf *m, struct buf_vector *buf_vec, + uint16_t nr_vec, uint16_t num_buffers, bool is_async) { uint32_t vec_idx = 0; uint32_t mbuf_offset, mbuf_avail; @@ -925,115 +925,7 @@ copy_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, uint64_t hdr_addr; struct rte_mbuf *hdr_mbuf; struct virtio_net_hdr_mrg_rxbuf tmp_hdr, *hdr = NULL; - - if (unlikely(m == NULL)) - return -1; - - buf_addr = buf_vec[vec_idx].buf_addr; - buf_iova = buf_vec[vec_idx].buf_iova; - buf_len = buf_vec[vec_idx].buf_len; - - if (unlikely(buf_len < dev->vhost_hlen && nr_vec <= 1)) - return -1; - - hdr_mbuf = m; - hdr_addr = buf_addr; - if (unlikely(buf_len < dev->vhost_hlen)) { - memset(&tmp_hdr, 0, sizeof(struct virtio_net_hdr_mrg_rxbuf)); - hdr = &tmp_hdr; - } else - hdr = (struct virtio_net_hdr_mrg_rxbuf *)(uintptr_t)hdr_addr; - - VHOST_LOG_DATA(DEBUG, "(%d) RX: num merge buffers %d\n", - dev->vid, num_buffers); - - if (unlikely(buf_len < dev->vhost_hlen)) { - buf_offset = dev->vhost_hlen - buf_len; - vec_idx++; - buf_addr = buf_vec[vec_idx].buf_addr; - buf_iova = buf_vec[vec_idx].buf_iova; - buf_len = buf_vec[vec_idx].buf_len; - buf_avail = buf_len - buf_offset; - } else { - buf_offset = dev->vhost_hlen; - buf_avail = buf_len - dev->vhost_hlen; - } - - mbuf_avail = rte_pktmbuf_data_len(m); - mbuf_offset = 0; - while (mbuf_avail != 0 || m->next != NULL) { - /* done with current buf, get the next one */ - if (buf_avail == 0) { - vec_idx++; - if (unlikely(vec_idx >= nr_vec)) - goto error; - - buf_addr = buf_vec[vec_idx].buf_addr; - buf_iova = buf_vec[vec_idx].buf_iova; - buf_len = buf_vec[vec_idx].buf_len; - - buf_offset = 0; - buf_avail = buf_len; - } - - /* done with current mbuf, get the next one */ - if (mbuf_avail == 0) { - m = m->next; - - mbuf_offset = 0; - mbuf_avail = rte_pktmbuf_data_len(m); - } - - if (hdr_addr) { - virtio_enqueue_offload(hdr_mbuf, &hdr->hdr); - if (rxvq_is_mergeable(dev)) - ASSIGN_UNLESS_EQUAL(hdr->num_buffers, - num_buffers); - - if (unlikely(hdr == &tmp_hdr)) { - copy_vnet_hdr_to_desc(dev, vq, buf_vec, hdr); - } else { - PRINT_PACKET(dev, (uintptr_t)hdr_addr, - dev->vhost_hlen, 0); - vhost_log_cache_write_iova(dev, vq, - buf_vec[0].buf_iova, - dev->vhost_hlen); - } - - hdr_addr = 0; - } - - cpy_len = RTE_MIN(buf_avail, mbuf_avail); - - sync_mbuf_to_desc_seg(dev, vq, m, mbuf_offset, - buf_addr + buf_offset, - buf_iova + buf_offset, cpy_len); - - mbuf_avail -= cpy_len; - mbuf_offset += cpy_len; - buf_avail -= cpy_len; - buf_offset += cpy_len; - } - - return 0; -error: - return -1; -} - -static __rte_always_inline int -async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, - struct rte_mbuf *m, struct buf_vector *buf_vec, - uint16_t nr_vec, uint16_t num_buffers) -{ struct vhost_async *async = vq->async; - struct rte_mbuf *hdr_mbuf; - struct virtio_net_hdr_mrg_rxbuf tmp_hdr, *hdr = NULL; - uint64_t buf_addr, buf_iova; - uint64_t hdr_addr; - uint32_t vec_idx = 0; - uint32_t mbuf_offset, mbuf_avail; - uint32_t buf_offset, buf_avail; - uint32_t cpy_len, buf_len; if (unlikely(m == NULL)) return -1; @@ -1071,8 +963,10 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, mbuf_avail = rte_pktmbuf_data_len(m); mbuf_offset = 0; - if (async_iter_initialize(async)) - return -1; + if (is_async) { + if (async_iter_initialize(async)) + return -1; + } while (mbuf_avail != 0 || m->next != NULL) { /* done with current buf, get the next one */ @@ -1086,7 +980,7 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, buf_len = buf_vec[vec_idx].buf_len; buf_offset = 0; - buf_avail = buf_len; + buf_avail = buf_len; } /* done with current mbuf, get the next one */ @@ -1094,7 +988,7 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, m = m->next; mbuf_offset = 0; - mbuf_avail = rte_pktmbuf_data_len(m); + mbuf_avail = rte_pktmbuf_data_len(m); } if (hdr_addr) { @@ -1118,9 +1012,14 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, cpy_len = RTE_MIN(buf_avail, mbuf_avail); - if (async_mbuf_to_desc_seg(dev, vq, m, mbuf_offset, - buf_iova + buf_offset, cpy_len) < 0) { - goto error; + if (is_async) { + if (async_mbuf_to_desc_seg(dev, vq, m, mbuf_offset, + buf_iova + buf_offset, cpy_len) < 0) + goto error; + } else { + sync_mbuf_to_desc_seg(dev, vq, m, mbuf_offset, + buf_addr + buf_offset, + buf_iova + buf_offset, cpy_len); } mbuf_avail -= cpy_len; @@ -1129,11 +1028,13 @@ async_mbuf_to_desc(struct virtio_net *dev, struct vhost_virtqueue *vq, buf_offset += cpy_len; } - async_iter_finalize(async); + if (is_async) + async_iter_finalize(async); return 0; error: - async_iter_cancel(async); + if (is_async) + async_iter_cancel(async); return -1; } @@ -1192,7 +1093,7 @@ vhost_enqueue_single_packed(struct virtio_net *dev, avail_idx -= vq->size; } - if (copy_mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, num_buffers) < 0) + if (mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, num_buffers, false) < 0) return -1; vhost_shadow_enqueue_single_packed(dev, vq, buffer_len, buffer_buf_id, @@ -1236,9 +1137,8 @@ virtio_dev_rx_split(struct virtio_net *dev, struct vhost_virtqueue *vq, dev->vid, vq->last_avail_idx, vq->last_avail_idx + num_buffers); - if (copy_mbuf_to_desc(dev, vq, pkts[pkt_idx], - buf_vec, nr_vec, - num_buffers) < 0) { + if (mbuf_to_desc(dev, vq, pkts[pkt_idx], buf_vec, nr_vec, + num_buffers, false) < 0) { vq->shadow_used_idx -= num_buffers; break; } @@ -1582,7 +1482,7 @@ virtio_dev_rx_async_submit_split(struct virtio_net *dev, VHOST_LOG_DATA(DEBUG, "(%d) current index %d | end index %d\n", dev->vid, vq->last_avail_idx, vq->last_avail_idx + num_buffers); - if (async_mbuf_to_desc(dev, vq, pkts[pkt_idx], buf_vec, nr_vec, num_buffers) < 0) { + if (mbuf_to_desc(dev, vq, pkts[pkt_idx], buf_vec, nr_vec, num_buffers, true) < 0) { vq->shadow_used_idx -= num_buffers; break; } @@ -1751,8 +1651,7 @@ vhost_enqueue_async_packed(struct virtio_net *dev, avail_idx -= vq->size; } - if (unlikely(async_mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, - *nr_buffers) < 0)) + if (unlikely(mbuf_to_desc(dev, vq, pkt, buf_vec, nr_vec, *nr_buffers, true) < 0)) return -1; vhost_shadow_enqueue_packed(vq, buffer_len, buffer_buf_id, buffer_desc_count, *nr_buffers); -- 2.31.1