From patchwork Mon Feb 14 08:14:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xuan Zhuo X-Patchwork-Id: 12745109 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 CE495C4332F for ; Mon, 14 Feb 2022 08:15:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241687AbiBNIPK (ORCPT ); Mon, 14 Feb 2022 03:15:10 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:42112 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241691AbiBNIPF (ORCPT ); Mon, 14 Feb 2022 03:15:05 -0500 Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C14C15F8FF; Mon, 14 Feb 2022 00:14:57 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R101e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04357;MF=xuanzhuo@linux.alibaba.com;NM=1;PH=DS;RN=11;SR=0;TI=SMTPD_---0V4O5xBg_1644826480; Received: from localhost(mailfrom:xuanzhuo@linux.alibaba.com fp:SMTPD_---0V4O5xBg_1644826480) by smtp.aliyun-inc.com(127.0.0.1); Mon, 14 Feb 2022 16:14:41 +0800 From: Xuan Zhuo To: virtualization@lists.linux-foundation.org, netdev@vger.kernel.org Cc: "Michael S. Tsirkin" , Jason Wang , "David S. Miller" , Jakub Kicinski , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , bpf@vger.kernel.org Subject: [PATCH v5 22/22] virtio_net: support set_ringparam Date: Mon, 14 Feb 2022 16:14:16 +0800 Message-Id: <20220214081416.117695-23-xuanzhuo@linux.alibaba.com> X-Mailer: git-send-email 2.31.0 In-Reply-To: <20220214081416.117695-1-xuanzhuo@linux.alibaba.com> References: <20220214081416.117695-1-xuanzhuo@linux.alibaba.com> MIME-Version: 1.0 X-Git-Hash: 24fd8391539b Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Support set_ringparam based on virtio queue reset. The rx,tx_pending required to be passed must be power of 2. Signed-off-by: Xuan Zhuo --- drivers/net/virtio_net.c | 50 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index f9bb760c6dbd..bf460ea87354 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -2308,6 +2308,55 @@ static void virtnet_get_ringparam(struct net_device *dev, ring->tx_pending = virtqueue_get_vring_size(vi->sq[0].vq); } +static int virtnet_set_ringparam(struct net_device *dev, + struct ethtool_ringparam *ring, + struct kernel_ethtool_ringparam *kernel_ring, + struct netlink_ext_ack *extack) +{ + struct virtnet_info *vi = netdev_priv(dev); + u32 rx_pending, tx_pending; + int i, err; + + if (ring->rx_mini_pending || ring->rx_jumbo_pending) + return -EINVAL; + + rx_pending = virtqueue_get_vring_size(vi->rq[0].vq); + tx_pending = virtqueue_get_vring_size(vi->sq[0].vq); + + if (ring->rx_pending == rx_pending && + ring->tx_pending == tx_pending) + return 0; + + if (ring->rx_pending > virtqueue_get_vring_max_size(vi->rq[0].vq)) + return -EINVAL; + + if (ring->tx_pending > virtqueue_get_vring_max_size(vi->sq[0].vq)) + return -EINVAL; + + if (!is_power_of_2(ring->rx_pending)) + return -EINVAL; + + if (!is_power_of_2(ring->tx_pending)) + return -EINVAL; + + for (i = 0; i < vi->max_queue_pairs; i++) { + if (ring->tx_pending != tx_pending) { + virtio_set_max_ring_num(vi->vdev, ring->tx_pending); + err = virtnet_tx_vq_reset(vi, i); + if (err) + return err; + } + + if (ring->rx_pending != rx_pending) { + virtio_set_max_ring_num(vi->vdev, ring->rx_pending); + err = virtnet_rx_vq_reset(vi, i); + if (err) + return err; + } + } + + return 0; +} static void virtnet_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) @@ -2541,6 +2590,7 @@ static const struct ethtool_ops virtnet_ethtool_ops = { .get_drvinfo = virtnet_get_drvinfo, .get_link = ethtool_op_get_link, .get_ringparam = virtnet_get_ringparam, + .set_ringparam = virtnet_set_ringparam, .get_strings = virtnet_get_strings, .get_sset_count = virtnet_get_sset_count, .get_ethtool_stats = virtnet_get_ethtool_stats,