From patchwork Mon Aug 21 10:12:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Salil Mehta X-Patchwork-Id: 9912033 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 40D39602A0 for ; Mon, 21 Aug 2017 10:12:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 303F128758 for ; Mon, 21 Aug 2017 10:12:55 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 251592875B; Mon, 21 Aug 2017 10:12:55 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A4BB228763 for ; Mon, 21 Aug 2017 10:12:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752677AbdHUKMx (ORCPT ); Mon, 21 Aug 2017 06:12:53 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4519 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751894AbdHUKMw (ORCPT ); Mon, 21 Aug 2017 06:12:52 -0400 Received: from 172.30.72.58 (EHLO DGGEMS405-HUB.china.huawei.com) ([172.30.72.58]) by dggrg04-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id DFO85388; Mon, 21 Aug 2017 18:12:47 +0800 (CST) Received: from S00293818-DELL1.china.huawei.com (10.203.181.152) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.301.0; Mon, 21 Aug 2017 18:12:39 +0800 From: Salil Mehta To: CC: , , , , , , , Subject: [PATCH V3 net-next] net: hns3: Add support to change MTU in HNS3 hardware Date: Mon, 21 Aug 2017 11:12:23 +0100 Message-ID: <20170821101223.111852-1-salil.mehta@huawei.com> X-Mailer: git-send-email 2.8.3 MIME-Version: 1.0 X-Originating-IP: [10.203.181.152] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020201.599AB220.0095, 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: f37c4b919b3bbced09d28d960674b95e Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds the following support to the HNS3 driver: 1. Support to change the Maximum Transmission Unit of a of a port in the HNS NIC hardware. 2. Initializes the supported MTU range for the netdevice. Signed-off-by: lipeng Signed-off-by: Salil Mehta Reviewed-by: Andrew Lunn --- PATCH V3: Addressed some minor comments Leon Romanovsky 1. https://lkml.org/lkml/2017/8/20/27 PATCH V2: Addresses comments given by Andrew Lunn 1. https://lkml.org/lkml/2017/8/18/282 PATCH V1: Initial Submit --- .../net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c | 36 ++++++++++++++++++++++ .../net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h | 1 + 2 files changed, 37 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c index e731f87..c087a9f 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c @@ -1278,11 +1278,44 @@ 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; + + 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; + } + + /* if the netdev was running earlier, bring it up again */ + if (if_running) { + if (hns3_nic_net_open(netdev)) + 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 +2785,9 @@ static int hns3_client_init(struct hnae3_handle *handle) goto out_reg_netdev_fail; } + /* MTU range: (ETH_MIN_MTU(kernel default) - 9706) */ + 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