From patchwork Thu Feb 2 11:00:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 13125763 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 802C2C05027 for ; Thu, 2 Feb 2023 11:01:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231923AbjBBLBx (ORCPT ); Thu, 2 Feb 2023 06:01:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58370 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232644AbjBBLBY (ORCPT ); Thu, 2 Feb 2023 06:01:24 -0500 Received: from out30-112.freemail.mail.aliyun.com (out30-112.freemail.mail.aliyun.com [115.124.30.112]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CAF92885E3; Thu, 2 Feb 2023 03:01:18 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046049;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=21;SR=0;TI=SMTPD_---0VakpyCS_1675335673; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VakpyCS_1675335673) by smtp.aliyun-inc.com; Thu, 02 Feb 2023 19:01:13 +0800 From: Xuan Zhuo To: netdev@vger.kernel.org Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Michael S. Tsirkin" , Jason Wang , =?utf-8?b?QmrDtnJuIFTDtnBlbA==?= , Magnus Karlsson , Maciej Fijalkowski , Jonathan Lemon , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Sebastian Andrzej Siewior , Menglong Dong , Kuniyuki Iwashima , Petr Machata , virtualization@lists.linux-foundation.org, bpf@vger.kernel.org Subject: [PATCH 12/33] virtio_net: unify the code for recycling the xmit ptr Date: Thu, 2 Feb 2023 19:00:37 +0800 Message-Id: <20230202110058.130695-13-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.32.0.3.g01195cf9f In-Reply-To: <20230202110058.130695-1-xuanzhuo@linux.alibaba.com> References: <20230202110058.130695-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: d7589ab6ea10 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org There are two completely similar and independent implementations. This is inconvenient for the subsequent addition of new types. So extract a function from this piece of code and call this function uniformly to recover old xmit ptr. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 76 +++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 43 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index bc7b9ccb325a..058ec6ca7cfc 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -318,6 +318,30 @@ static struct xdp_frame *ptr_to_xdp(void *ptr) return (struct xdp_frame *)((unsigned long)ptr & ~VIRTIO_XDP_FLAG); } +static void __free_old_xmit(struct send_queue *sq, bool in_napi, + struct virtnet_sq_stats *stats) +{ + unsigned int len; + void *ptr; + + while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) { + if (!is_xdp_frame(ptr)) { + struct sk_buff *skb = ptr; + + pr_debug("Sent skb %p\n", skb); + + stats->bytes += skb->len; + napi_consume_skb(skb, in_napi); + } else { + struct xdp_frame *frame = ptr_to_xdp(ptr); + + stats->bytes += xdp_get_frame_len(frame); + xdp_return_frame(frame); + } + stats->packets++; + } +} + /* Converting between virtqueue no. and kernel tx/rx queue no. * 0:rx0 1:tx0 2:rx1 3:tx1 ... 2N:rxN 2N+1:txN 2N+2:cvq */ @@ -635,15 +659,12 @@ static int virtnet_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames, u32 flags) { struct virtnet_info *vi = netdev_priv(dev); + struct virtnet_sq_stats stats = {}; struct receive_queue *rq = vi->rq; struct bpf_prog *xdp_prog; struct send_queue *sq; - unsigned int len; - int packets = 0; - int bytes = 0; int nxmit = 0; int kicks = 0; - void *ptr; int ret; int i; @@ -662,20 +683,7 @@ static int virtnet_xdp_xmit(struct net_device *dev, } /* Free up any pending old buffers before queueing new ones. */ - while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) { - if (likely(is_xdp_frame(ptr))) { - struct xdp_frame *frame = ptr_to_xdp(ptr); - - bytes += xdp_get_frame_len(frame); - xdp_return_frame(frame); - } else { - struct sk_buff *skb = ptr; - - bytes += skb->len; - napi_consume_skb(skb, false); - } - packets++; - } + __free_old_xmit(sq, false, &stats); for (i = 0; i < n; i++) { struct xdp_frame *xdpf = frames[i]; @@ -692,8 +700,8 @@ static int virtnet_xdp_xmit(struct net_device *dev, } out: u64_stats_update_begin(&sq->stats.syncp); - sq->stats.bytes += bytes; - sq->stats.packets += packets; + sq->stats.bytes += stats.bytes; + sq->stats.packets += stats.packets; sq->stats.xdp_tx += n; sq->stats.xdp_tx_drops += n - nxmit; sq->stats.kicks += kicks; @@ -1716,37 +1724,19 @@ static int virtnet_receive(struct receive_queue *rq, int budget, static void free_old_xmit(struct send_queue *sq, bool in_napi) { - unsigned int len; - unsigned int packets = 0; - unsigned int bytes = 0; - void *ptr; + struct virtnet_sq_stats stats = {}; - while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) { - if (likely(!is_xdp_frame(ptr))) { - struct sk_buff *skb = ptr; - - pr_debug("Sent skb %p\n", skb); - - bytes += skb->len; - napi_consume_skb(skb, in_napi); - } else { - struct xdp_frame *frame = ptr_to_xdp(ptr); - - bytes += xdp_get_frame_len(frame); - xdp_return_frame(frame); - } - packets++; - } + __free_old_xmit(sq, in_napi, &stats); /* Avoid overhead when no packets have been processed * happens when called speculatively from start_xmit. */ - if (!packets) + if (!stats.packets) return; u64_stats_update_begin(&sq->stats.syncp); - sq->stats.bytes += bytes; - sq->stats.packets += packets; + sq->stats.bytes += stats.bytes; + sq->stats.packets += stats.packets; u64_stats_update_end(&sq->stats.syncp); }