From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47680C43381 for ; Thu, 28 Feb 2019 13:39:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 17B732171F for ; Thu, 28 Feb 2019 13:39:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730797AbfB1NjN (ORCPT ); Thu, 28 Feb 2019 08:39:13 -0500 Received: from smtp.asem.it ([151.1.184.197]:49575 "EHLO smtp.asem.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726806AbfB1NjL (ORCPT ); Thu, 28 Feb 2019 08:39:11 -0500 Received: from webmail.asem.it by asem.it (smtp.asem.it) (SecurityGateway 5.5.0) with ESMTP id SG003723098.MSG for ; Thu, 28 Feb 2019 14:39:06 +0100S Received: from ASAS044.asem.intra (172.16.16.44) by ASAS044.asem.intra (172.16.16.44) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1261.35; Thu, 28 Feb 2019 14:39:05 +0100 Received: from flavio-x.asem.intra (172.16.17.161) by ASAS044.asem.intra (172.16.16.44) with Microsoft SMTP Server id 15.1.1261.35 via Frontend Transport; Thu, 28 Feb 2019 14:39:05 +0100 From: Flavio Suligoi To: Jeff Kirsher , "David S . Miller" , , , CC: Flavio Suligoi Subject: [PATCH v2] net: e1000e: add MAC address kernel cmd line parameter Date: Thu, 28 Feb 2019 14:38:55 +0100 Message-ID: <1551361135-404-1-git-send-email-f.suligoi@asem.it> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1551345635-10291-1-git-send-email-f.suligoi@asem.it> References: <1551345635-10291-1-git-send-email-f.suligoi@asem.it> MIME-Version: 1.0 Content-Type: text/plain X-SGHeloLookup-Result: pass smtp.helo=webmail.asem.it (ip=172.16.16.44) X-SGSPF-Result: none (smtp.asem.it) X-SGOP-RefID: str=0001.0A0B0203.5C77E479.007B,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0 (_st=1 _vt=0 _iwf=0) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sometimes, in some embedded systems boards (i.e. ARM boards), the NVM eeprom is not mounted, to save cost and space. In this case it is necessary to bypass the NVM management and directly force the MAC address using a kernel command-line parameter (macaddr). Signed-off-by: Flavio Suligoi v2: - e1000_probe: remove wrong newline in the middle of the local variable list v1: - written --- drivers/net/ethernet/intel/e1000e/netdev.c | 49 +++++++++++++++++++----------- 1 file changed, 32 insertions(+), 17 deletions(-) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 189f231..34ab560 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -39,6 +39,10 @@ static int debug = -1; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); +static unsigned char macaddr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; +module_param_array(macaddr, byte, NULL, 0); +MODULE_PARM_DESC(macaddr, "e1000e Ethernet MAC address"); + static const struct e1000_info *e1000_info_tbl[] = { [board_82571] = &e1000_82571_info, [board_82572] = &e1000_82572_info, @@ -7232,27 +7236,38 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) */ adapter->hw.mac.ops.reset_hw(&adapter->hw); - /* systems with ASPM and others may see the checksum fail on the first - * attempt. Let's give it a few tries - */ - for (i = 0;; i++) { - if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) - break; - if (i == 2) { - dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n"); - err = -EIO; - goto err_eeprom; + /* If the MAC address is supplied by the bootloader, use it! */ + if (!is_multicast_ether_addr(macaddr)) { + dev_info(&pdev->dev, + "MAC address from kernel command line argument\n"); + memcpy(adapter->hw.mac.addr, macaddr, netdev->addr_len); + memcpy(netdev->dev_addr, macaddr, netdev->addr_len); + } else { + /* systems with ASPM and others may see the checksum fail on + * the first attempt. Let's give it a few tries + */ + dev_info(&pdev->dev, "MAC address from NVM\n"); + for (i = 0;; i++) { + if (e1000_validate_nvm_checksum(&adapter->hw) >= 0) + break; + if (i == 2) { + dev_err(&pdev->dev, + "The NVM Checksum Is Not Valid\n"); + err = -EIO; + goto err_eeprom; + } } - } - e1000_eeprom_checks(adapter); + e1000_eeprom_checks(adapter); - /* copy the MAC address */ - if (e1000e_read_mac_addr(&adapter->hw)) - dev_err(&pdev->dev, - "NVM Read Error while reading MAC address\n"); + /* copy the MAC address */ + if (e1000e_read_mac_addr(&adapter->hw)) + dev_err(&pdev->dev, + "NVM Read Error while reading MAC address\n"); - memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len); + memcpy(netdev->dev_addr, adapter->hw.mac.addr, + netdev->addr_len); + } if (!is_valid_ether_addr(netdev->dev_addr)) { dev_err(&pdev->dev, "Invalid MAC Address: %pM\n", -- 2.7.4