From patchwork Thu Apr 27 02:44:12 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: yankejian X-Patchwork-Id: 755735 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3wD14636GDz9s80 for ; Thu, 27 Apr 2017 12:24:38 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1033585AbdD0CY1 (ORCPT ); Wed, 26 Apr 2017 22:24:27 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:5804 "EHLO dggrg01-dlp.huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1033475AbdD0CYT (ORCPT ); Wed, 26 Apr 2017 22:24:19 -0400 Received: from 172.30.72.56 (EHLO DGGEML402-HUB.china.huawei.com) ([172.30.72.56]) by dggrg01-dlp.huawei.com (MOS 4.4.6-GA FastPath queued) with ESMTP id ANL44692; Thu, 27 Apr 2017 10:24:17 +0800 (CST) Received: from linux-ioko.site (10.71.200.31) by DGGEML402-HUB.china.huawei.com (10.3.17.38) with Microsoft SMTP Server id 14.3.301.0; Thu, 27 Apr 2017 10:24:07 +0800 From: Yankejian To: , , , , , , , CC: , Subject: [PATCH net v4 2/3] net: hns: support deferred probe when no mdio Date: Thu, 27 Apr 2017 10:44:12 +0800 Message-ID: <1493261053-68197-3-git-send-email-yankejian@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1493261053-68197-1-git-send-email-yankejian@huawei.com> References: <1493261053-68197-1-git-send-email-yankejian@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.71.200.31] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020203.59015651.006A, 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: 210b812df7f39fb40f9fe6018786e82b Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: lipeng In the hip06 and hip07 SoCs, phy connect to mdio bus.The mdio module is probed with module_init, and, as such, is not guaranteed to probe before the HNS driver. So we need to support deferred probe. We check for probe deferral in the mac init, so we not init DSAF when there is no mdio, and free all resource, to later learn that we need to defer the probe. Signed-off-by: lipeng Reviewed-by: Yisen Zhuang Reviewed-by: Matthias Brugger --- drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c | 39 +++++++++++++++++++---- 1 file changed, 33 insertions(+), 6 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c index bdd8cdd..8c00e09 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_dsaf_mac.c @@ -735,6 +735,8 @@ static int hns_mac_init_ex(struct hns_mac_cb *mac_cb) rc = phy_device_register(phy); if (rc) { phy_device_free(phy); + dev_err(&mdio->dev, "registered phy fail at address %i\n", + addr); return -ENODEV; } @@ -745,7 +747,7 @@ static int hns_mac_init_ex(struct hns_mac_cb *mac_cb) return 0; } -static void hns_mac_register_phy(struct hns_mac_cb *mac_cb) +static int hns_mac_register_phy(struct hns_mac_cb *mac_cb) { struct acpi_reference_args args; struct platform_device *pdev; @@ -755,24 +757,39 @@ static void hns_mac_register_phy(struct hns_mac_cb *mac_cb) /* Loop over the child nodes and register a phy_device for each one */ if (!to_acpi_device_node(mac_cb->fw_port)) - return; + return -ENODEV; rc = acpi_node_get_property_reference( mac_cb->fw_port, "mdio-node", 0, &args); if (rc) - return; + return rc; addr = hns_mac_phy_parse_addr(mac_cb->dev, mac_cb->fw_port); if (addr < 0) - return; + return addr; /* dev address in adev */ pdev = hns_dsaf_find_platform_device(acpi_fwnode_handle(args.adev)); + if (!pdev) { + dev_err(mac_cb->dev, "mac%d mdio pdev is NULL\n", + mac_cb->mac_id); + return -EINVAL; + } + mii_bus = platform_get_drvdata(pdev); + if (!mii_bus) { + dev_err(mac_cb->dev, + "mac%d mdio is NULL, dsaf will probe again later\n", + mac_cb->mac_id); + return -EPROBE_DEFER; + } + rc = hns_mac_register_phydev(mii_bus, mac_cb, addr); if (!rc) dev_dbg(mac_cb->dev, "mac%d register phy addr:%d\n", mac_cb->mac_id, addr); + + return rc; } #define MAC_MEDIA_TYPE_MAX_LEN 16 @@ -793,7 +810,7 @@ static void hns_mac_register_phy(struct hns_mac_cb *mac_cb) *@np:device node * return: 0 --success, negative --fail */ -static int hns_mac_get_info(struct hns_mac_cb *mac_cb) +static int hns_mac_get_info(struct hns_mac_cb *mac_cb) { struct device_node *np; struct regmap *syscon; @@ -903,7 +920,15 @@ static int hns_mac_get_info(struct hns_mac_cb *mac_cb) } } } else if (is_acpi_node(mac_cb->fw_port)) { - hns_mac_register_phy(mac_cb); + ret = hns_mac_register_phy(mac_cb); + /* + * Mac can work well if there is phy or not.If the port don't + * connect with phy, the return value will be ignored. Only + * when there is phy but can't find mdio bus, the return value + * will be handled. + */ + if (ret == -EPROBE_DEFER) + return ret; } else { dev_err(mac_cb->dev, "mac%d cannot find phy node\n", mac_cb->mac_id); @@ -1065,6 +1090,7 @@ int hns_mac_init(struct dsaf_device *dsaf_dev) dsaf_dev->mac_cb[port_id] = mac_cb; } } + /* init mac_cb for all port */ for (port_id = 0; port_id < max_port_num; port_id++) { mac_cb = dsaf_dev->mac_cb[port_id]; @@ -1074,6 +1100,7 @@ int hns_mac_init(struct dsaf_device *dsaf_dev) ret = hns_mac_get_cfg(dsaf_dev, mac_cb); if (ret) return ret; + ret = hns_mac_init_ex(mac_cb); if (ret) return ret;