From patchwork Mon Aug 16 16:07:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arkadiusz Kubalewski X-Patchwork-Id: 12438841 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 X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 AF2C6C4338F for ; Mon, 16 Aug 2021 16:18:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9839A60F58 for ; Mon, 16 Aug 2021 16:18:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231604AbhHPQSu (ORCPT ); Mon, 16 Aug 2021 12:18:50 -0400 Received: from mga18.intel.com ([134.134.136.126]:27651 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231609AbhHPQSc (ORCPT ); Mon, 16 Aug 2021 12:18:32 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10078"; a="203046345" X-IronPort-AV: E=Sophos;i="5.84,326,1620716400"; d="scan'208";a="203046345" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Aug 2021 09:18:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,326,1620716400"; d="scan'208";a="487524589" Received: from amlin-018-053.igk.intel.com ([10.102.18.53]) by fmsmga008.fm.intel.com with ESMTP; 16 Aug 2021 09:17:57 -0700 From: Arkadiusz Kubalewski To: linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: jesse.brandeburg@intel.com, anthony.l.nguyen@intel.com, davem@davemloft.net, kuba@kernel.org, richardcochran@gmail.com, shuah@kernel.org, arkadiusz.kubalewski@intel.com, arnd@arndb.de, nikolay@nvidia.com, cong.wang@bytedance.com, colin.king@canonical.com, gustavoars@kernel.org Subject: [RFC net-next 7/7] ice: add sysfs interface to configure PHY recovered reference signal Date: Mon, 16 Aug 2021 18:07:17 +0200 Message-Id: <20210816160717.31285-8-arkadiusz.kubalewski@intel.com> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20210816160717.31285-1-arkadiusz.kubalewski@intel.com> References: <20210816160717.31285-1-arkadiusz.kubalewski@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Allow user to enable or disable propagation of PHY recovered clock signal onto requested output pin with new human friendly device private sysfs interface. Signed-off-by: Arkadiusz Kubalewski --- drivers/net/ethernet/intel/ice/ice_ptp.c | 111 ++++++++++++++++++++++- drivers/net/ethernet/intel/ice/ice_ptp.h | 1 + 2 files changed, 111 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c index 23ab85dbbfc8..054346a8fdbd 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.c +++ b/drivers/net/ethernet/intel/ice/ice_ptp.c @@ -9,6 +9,114 @@ #define UNKNOWN_INCVAL_E822 0x100000000ULL +static ssize_t ice_sysfs_phy_write(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t count); + +static struct kobj_attribute phy_attribute = __ATTR(synce, 0220, + NULL, ice_sysfs_phy_write); + +/** + * __get_pf_pdev - helper function to get the pdev + * @kobj: kobject passed + * @pdev: PCI device information struct + * + * Raturns 0 on success, negative on failure + */ +static int __get_pf_pdev(struct kobject *kobj, struct pci_dev **pdev) +{ + struct device *dev; + + if (!kobj->parent) + return -EINVAL; + + /* get pdev */ + dev = kobj_to_dev(kobj->parent); + *pdev = to_pci_dev(dev); + + return 0; +} + +#define ICE_C827_RCLKB_PIN 1 /* SDA pin */ + +/** + * ice_sysfs_phy_write - sysfs interface for setting PHY recovered clock pins + * @kobj: sysfs node + * @attr: sysfs node attributes + * @buf: string representing enable and pin number + * @count: length of the 'buf' string + * + * Return number of bytes written on success or negative value on failure. + **/ +static ssize_t +ice_sysfs_phy_write(struct kobject *kobj, struct kobj_attribute *attr, + const char *buf, size_t count) +{ + enum ice_status ret = 0; + unsigned int ena, pin; + struct pci_dev *pdev; + struct ice_pf *pf; + u32 freq = 0; + int cnt; + + if (__get_pf_pdev(kobj, &pdev)) + return -EPERM; + + pf = pci_get_drvdata(pdev); + + cnt = sscanf(buf, "%u %u", &ena, &pin); + if (cnt != 2 || pin > ICE_C827_RCLKB_PIN) + return -EINVAL; + + ret = ice_aq_set_phy_rec_clk_out(&pf->hw, pin, !!ena, &freq); + if (ret) + return -EIO; + + return count; +} + +/** + * ice_phy_sysfs_init - initialize sysfs for DPLL + * @pf: pointer to pf structure + * + * Initialize sysfs for handling DPLL in HW. + **/ +static void ice_phy_sysfs_init(struct ice_pf *pf) +{ + struct kobject *phy_kobj; + + phy_kobj = kobject_create_and_add("phy", &pf->pdev->dev.kobj); + if (!phy_kobj) { + dev_info(&pf->pdev->dev, "Failed to create PHY kobject\n"); + return; + } + + if (sysfs_create_file(phy_kobj, &phy_attribute.attr)) { + dev_info(&pf->pdev->dev, "Failed to create synce kobject\n"); + kobject_put(phy_kobj); + return; + } + + pf->ptp.phy_kobj = phy_kobj; +} + +/** + * ice_ptp_sysfs_release - release sysfs resources of ptp and synce features + * @pf: pointer to pf structure + * + * Release sysfs interface resources for handling configuration of + * ptp and synce features. + */ +static void ice_ptp_sysfs_release(struct ice_pf *pf) +{ + if (pf->ptp.phy_kobj) { + sysfs_remove_file(pf->ptp.phy_kobj, &phy_attribute.attr); + kobject_del(pf->ptp.phy_kobj); + kobject_put(pf->ptp.phy_kobj); + pf->ptp.phy_kobj = 0; + } +} + /** * ice_set_tx_tstamp - Enable or disable Tx timestamping * @pf: The PF pointer to search in @@ -2121,6 +2229,7 @@ void ice_ptp_init(struct ice_pf *pf) return; } + ice_phy_sysfs_init(pf); /* Disable timestamping for both Tx and Rx */ ice_ptp_cfg_timestamp(pf, false); @@ -2180,7 +2289,7 @@ void ice_ptp_release(struct ice_pf *pf) { /* Disable timestamping for both Tx and Rx */ ice_ptp_cfg_timestamp(pf, false); - + ice_ptp_sysfs_release(pf); ice_ptp_release_tx_tracker(pf, &pf->ptp.port.tx); clear_bit(ICE_FLAG_PTP, pf->flags); diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.h b/drivers/net/ethernet/intel/ice/ice_ptp.h index 75656eb3084a..9b526782a977 100644 --- a/drivers/net/ethernet/intel/ice/ice_ptp.h +++ b/drivers/net/ethernet/intel/ice/ice_ptp.h @@ -143,6 +143,7 @@ struct ice_ptp { struct ptp_clock_info info; struct ptp_clock *clock; struct hwtstamp_config tstamp_config; + struct kobject *phy_kobj; }; #define __ptp_port_to_ptp(p) \