From patchwork Fri Aug 18 11:35:58 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Salil Mehta X-Patchwork-Id: 110383 Delivered-To: patch@linaro.org Received: by 10.140.95.78 with SMTP id h72csp790982qge; Fri, 18 Aug 2017 04:36:50 -0700 (PDT) X-Received: by 10.84.225.5 with SMTP id t5mr7015337plj.108.1503056210550; Fri, 18 Aug 2017 04:36:50 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1503056210; cv=none; d=google.com; s=arc-20160816; b=qZQA+/THx7m8bljJFiuKtVuMHcbm1vmLvDgztb3cb4RirKJ9NFJPHA5+++eMPpt8Li +Mh8mWbCHOM8EUACxJ5FcIhvRPKARLsLket9e0Mx1bm48no8bwVfGWqV7FkEDyGuRB4E xBvWxT6sb9HNSmKYCVUB3uPsap++mw889DNXVkmBmLoFeK/hxG7Y6NTbQWFZU+PSaJbk /CN7yiEtxHH//lDFnT47cc6glR6YfWpnc0Gs4VJLo9X9IS+GflIP9Dx8qdLQSzUFWtbs YKLRBcXybA4hK9vN5nG4kfvan5sQVvlViVK9Z2/wR82GqrL+jBfAdVLPG3Cwv32W2UtW FRqA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:mime-version:message-id:date:subject:cc :to:from:arc-authentication-results; bh=rmLsnNOSJmPvwtr6/5L2pO9wnpW/7SOrpJiUZqvBkuU=; b=yYGqPJq7TUWulpHBZPHJRHMnzJGtm80FbRmwPW8DJykQcX0lh2DAmnP/zG2AID0iQO 18iqyTWAHw+DdfQFe2stLR+hnmRrnBTaHUazZNnIof8eAHsBPWROsnTfBqbS4C6ost0U ECihRxS4uNnELESviTon4YqjjNtrzemcNQXaWAF5V1FP6qGouXUaDgEq0OhWYL7UxK6C FQXucZLV9KzMixDcFO+lYppxKnY4Hi/YdZSEpLIT5FClImIz4hj2Yd6EMu2ycBfGmlT4 x0/kqH7o5T2KUFdpiwuqdx0AwHzAC3Kcmm16x/JomJfTAtWEgr3fyIC4Snti+QVTzYVi hcRA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=netdev-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id g3si3930300plm.344.2017.08.18.04.36.50; Fri, 18 Aug 2017 04:36:50 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of netdev-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=netdev-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751091AbdHRLgs (ORCPT + 7 others); Fri, 18 Aug 2017 07:36:48 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4073 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750913AbdHRLgq (ORCPT ); Fri, 18 Aug 2017 07:36:46 -0400 Received: from 172.30.72.58 (EHLO DGGEMS405-HUB.china.huawei.com) ([172.30.72.58]) by dggrg05-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id DFM58510; Fri, 18 Aug 2017 19:36:44 +0800 (CST) Received: from S00293818-DELL1.china.huawei.com (10.203.181.151) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.301.0; Fri, 18 Aug 2017 19:36:32 +0800 From: Salil Mehta To: CC: , , , , , , , , Subject: [PATCH net-next] net: hns3: Add support to change MTU in hardware & netdev Date: Fri, 18 Aug 2017 12:35:58 +0100 Message-ID: <20170818113558.71928-1-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 MIME-Version: 1.0 X-Originating-IP: [10.203.181.151] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020206.5996D14C.00BA, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 59be54fe679e881051a274d89b69621a Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch adds the following support to the HNS3 driver: 1. Support to change the Maximum Transmission Unit of a netdevice and of a port in hardware . 2. Initializes the supported MTU range for the netdevice. Signed-off-by: lipeng Signed-off-by: Salil Mehta --- .../net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 46 ++++++++++++++++++++++ .../net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h | 1 + 2 files changed, 47 insertions(+) -- 2.7.4 diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c index e731f87..8e3711e 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c @@ -1278,11 +1278,53 @@ static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan, return ret; } +static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu) +{ + struct hns3_nic_priv *priv = netdev_priv(netdev); + struct hnae3_handle *h = priv->ae_handle; + bool if_running = netif_running(netdev); + int ret; + + /* no change in MTU */ + if (new_mtu == netdev->mtu) + return 0; + + if (!h->ae_algo->ops->set_mtu) + return -ENOTSUPP; + + /* if this was called with netdev up then bring netdevice down */ + if (if_running) { + (void)hns3_nic_net_stop(netdev); + msleep(100); + } + + ret = h->ae_algo->ops->set_mtu(h, new_mtu); + if (ret) { + netdev_err(netdev, "failed to change MTU in hardware %d\n", + ret); + return ret; + } + + /* assign newly changed mtu to netdevice as well */ + netdev->mtu = new_mtu; + + /* if the netdev was running earlier, bring it up again */ + if (if_running) { + if (hns3_nic_net_open(netdev)) { + netdev_err(netdev, "MTU, couldnt up netdev again\n"); + ret = -EINVAL; + } + } + + return ret; +} + static const struct net_device_ops hns3_nic_netdev_ops = { .ndo_open = hns3_nic_net_open, .ndo_stop = hns3_nic_net_stop, .ndo_start_xmit = hns3_nic_net_xmit, .ndo_set_mac_address = hns3_nic_net_set_mac_address, + .ndo_change_mtu = hns3_nic_change_mtu, .ndo_set_features = hns3_nic_set_features, .ndo_get_stats64 = hns3_nic_get_stats64, .ndo_setup_tc = hns3_nic_setup_tc, @@ -2752,6 +2794,10 @@ static int hns3_client_init(struct hnae3_handle *handle) goto out_reg_netdev_fail; } + /* MTU range: 68 - 9706 */ + netdev->min_mtu = ETH_MIN_MTU; + netdev->max_mtu = HNS3_MAX_MTU - (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); + return ret; out_reg_netdev_fail: diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h index a6e8f15..7e87461 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h @@ -76,6 +76,7 @@ enum hns3_nic_state { #define HNS3_RING_NAME_LEN 16 #define HNS3_BUFFER_SIZE_2048 2048 #define HNS3_RING_MAX_PENDING 32768 +#define HNS3_MAX_MTU 9728 #define HNS3_BD_SIZE_512_TYPE 0 #define HNS3_BD_SIZE_1024_TYPE 1