From patchwork Fri Jun 24 02:56:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12893543 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 41E15CCA485 for ; Fri, 24 Jun 2022 02:59:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231890AbiFXC7p (ORCPT ); Thu, 23 Jun 2022 22:59:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231923AbiFXC7O (ORCPT ); Thu, 23 Jun 2022 22:59:14 -0400 Received: from out30-131.freemail.mail.aliyun.com (out30-131.freemail.mail.aliyun.com [115.124.30.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 904B5B29; Thu, 23 Jun 2022 19:57:52 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R611e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046050;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=37;SR=0;TI=SMTPD_---0VHF16e0_1656039462; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0VHF16e0_1656039462) by smtp.aliyun-inc.com; Fri, 24 Jun 2022 10:57:44 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org Cc: Richard Weinberger , Anton Ivanov , Johannes Berg , "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Mark Gross , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , Xuan Zhuo , Vincent Whitchurch , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org, kangjie.xu@linux.alibaba.com Subject: [PATCH v10 36/41] virtio_net: set the default max ring size by find_vqs() Date: Fri, 24 Jun 2022 10:56:16 +0800 Message-Id: <20220624025621.128843-37-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> References: <20220624025621.128843-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: fef800c86cd2 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Use virtio_find_vqs_ctx_size() to specify the maximum ring size of tx, rx at the same time. | rx/tx ring size ------------------------------------------- speed == UNKNOWN or < 10G| 1024 speed < 40G | 4096 speed >= 40G | 8192 Call virtnet_update_settings() once before calling init_vqs() to update speed. Signed-off-by: Xuan Zhuo Acked-by: Jason Wang --- drivers/net/virtio_net.c | 42 ++++++++++++++++++++++++++++++++++++---- 1 file changed, 38 insertions(+), 4 deletions(-) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index db05b5e930be..c320d5e0bf6c 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -3208,6 +3208,29 @@ static unsigned int mergeable_min_buf_len(struct virtnet_info *vi, struct virtqu (unsigned int)GOOD_PACKET_LEN); } +static void virtnet_config_sizes(struct virtnet_info *vi, u32 *sizes) +{ + u32 i, rx_size, tx_size; + + if (vi->speed == SPEED_UNKNOWN || vi->speed < SPEED_10000) { + rx_size = 1024; + tx_size = 1024; + + } else if (vi->speed < SPEED_40000) { + rx_size = 1024 * 4; + tx_size = 1024 * 4; + + } else { + rx_size = 1024 * 8; + tx_size = 1024 * 8; + } + + for (i = 0; i < vi->max_queue_pairs; i++) { + sizes[rxq2vq(i)] = rx_size; + sizes[txq2vq(i)] = tx_size; + } +} + static int virtnet_find_vqs(struct virtnet_info *vi) { vq_callback_t **callbacks; @@ -3215,6 +3238,7 @@ static int virtnet_find_vqs(struct virtnet_info *vi) int ret = -ENOMEM; int i, total_vqs; const char **names; + u32 *sizes; bool *ctx; /* We expect 1 RX virtqueue followed by 1 TX virtqueue, followed by @@ -3242,10 +3266,15 @@ static int virtnet_find_vqs(struct virtnet_info *vi) ctx = NULL; } + sizes = kmalloc_array(total_vqs, sizeof(*sizes), GFP_KERNEL); + if (!sizes) + goto err_sizes; + /* Parameters for control virtqueue, if any */ if (vi->has_cvq) { callbacks[total_vqs - 1] = NULL; names[total_vqs - 1] = "control"; + sizes[total_vqs - 1] = 64; } /* Allocate/initialize parameters for send/receive virtqueues */ @@ -3260,8 +3289,10 @@ static int virtnet_find_vqs(struct virtnet_info *vi) ctx[rxq2vq(i)] = true; } - ret = virtio_find_vqs_ctx(vi->vdev, total_vqs, vqs, callbacks, - names, ctx, NULL); + virtnet_config_sizes(vi, sizes); + + ret = virtio_find_vqs_ctx_size(vi->vdev, total_vqs, vqs, callbacks, + names, sizes, ctx, NULL); if (ret) goto err_find; @@ -3281,6 +3312,8 @@ static int virtnet_find_vqs(struct virtnet_info *vi) err_find: + kfree(sizes); +err_sizes: kfree(ctx); err_ctx: kfree(names); @@ -3630,6 +3663,9 @@ static int virtnet_probe(struct virtio_device *vdev) vi->curr_queue_pairs = num_online_cpus(); vi->max_queue_pairs = max_queue_pairs; + virtnet_init_settings(dev); + virtnet_update_settings(vi); + /* Allocate/initialize the rx/tx queues, and invoke find_vqs */ err = init_vqs(vi); if (err) @@ -3642,8 +3678,6 @@ static int virtnet_probe(struct virtio_device *vdev) netif_set_real_num_tx_queues(dev, vi->curr_queue_pairs); netif_set_real_num_rx_queues(dev, vi->curr_queue_pairs); - virtnet_init_settings(dev); - if (virtio_has_feature(vdev, VIRTIO_NET_F_STANDBY)) { vi->failover = net_failover_create(vi->dev); if (IS_ERR(vi->failover)) {