From patchwork Tue Nov 24 15:32:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen Yu X-Patchwork-Id: 11929225 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=ham 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 5F22CC6379D for ; Tue, 24 Nov 2020 15:29:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 145DA206D8 for ; Tue, 24 Nov 2020 15:29:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389488AbgKXP3x (ORCPT ); Tue, 24 Nov 2020 10:29:53 -0500 Received: from mga11.intel.com ([192.55.52.93]:4560 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388503AbgKXP3x (ORCPT ); Tue, 24 Nov 2020 10:29:53 -0500 IronPort-SDR: yi5RIhHXcJrDHS+gTVKFwQeJ/IrEeQJclQsqrGSb+9JytBleXU3OeqcW7wzSJhlsEOzyhNIad4 1mImdnPWuM4w== X-IronPort-AV: E=McAfee;i="6000,8403,9815"; a="168453629" X-IronPort-AV: E=Sophos;i="5.78,366,1599548400"; d="scan'208";a="168453629" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2020 07:29:52 -0800 IronPort-SDR: fQ9I22IVv+TiwPdND4euQLiZL77uLd+BkWrMNAdcHQoR8q5461FCJzLbqRbjVYgdrDFpTOj+D3 JmkubIBnLlZA== X-IronPort-AV: E=Sophos;i="5.78,366,1599548400"; d="scan'208";a="546868986" Received: from chenyu-office.sh.intel.com ([10.239.158.173]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2020 07:29:49 -0800 From: Chen Yu To: "Rafael J. Wysocki" , Len Brown , Tony Nguyen , Jesse Brandeburg Cc: intel-wired-lan@lists.osuosl.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Sasha Neftin , Jeff Kirsher , Kai-Heng Feng , Chen Yu Subject: [PATCH] e1000e: Assign DPM_FLAG_SMART_SUSPEND and DPM_FLAG_MAY_SKIP_RESUME to speed up s2ram Date: Tue, 24 Nov 2020 23:32:21 +0800 Message-Id: <20201124153221.11265-1-yu.c.chen@intel.com> X-Mailer: git-send-email 2.17.1 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The NIC is put in runtime suspend status when there is no wire connected. As a result, it is safe to keep this NIC in runtime suspended during s2ram because the system does not rely on the NIC plug event nor WOL to wake up the system. Unlike the s2idle, s2ram does not need to manipulate S0ix settings during suspend. This patch assigns DPM_FLAG_SMART_SUSPEND and DPM_FLAG_MAY_SKIP_RESUME to the e1000e driver so that the s2ram could skip the .suspend_late(), .suspend_noirq() and .resume_noirq() .resume_early() when possible. Also skip .suspend() and .resume() if dev_pm_skip_suspend() and dev_pm_skip_resume() return true, so as to speed up the s2ram. Signed-off-by: Chen Yu --- drivers/base/power/main.c | 2 ++ drivers/net/ethernet/intel/e1000e/netdev.c | 14 +++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index c7ac49042cee..9cd8abba8612 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -580,6 +580,7 @@ bool dev_pm_skip_resume(struct device *dev) return !dev->power.must_resume; } +EXPORT_SYMBOL_GPL(dev_pm_skip_resume); /** * device_resume_noirq - Execute a "noirq resume" callback for given device. @@ -2010,3 +2011,4 @@ bool dev_pm_skip_suspend(struct device *dev) return dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND) && pm_runtime_status_suspended(dev); } +EXPORT_SYMBOL_GPL(dev_pm_skip_suspend); diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index b30f00891c03..d79fddabc553 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -6965,6 +6965,14 @@ static __maybe_unused int e1000e_pm_suspend(struct device *dev) struct e1000_hw *hw = &adapter->hw; int rc; + /* Runtime suspended means that there is no wired connection + * and it has nothing to do with WOL that, we don't need to + * adjust the WOL settings. So it is safe to put NIC in + * runtime suspend while doing system suspend. + */ + if (dev_pm_skip_suspend(dev)) + return 0; + e1000e_flush_lpic(pdev); e1000e_pm_freeze(dev); @@ -6989,6 +6997,9 @@ static __maybe_unused int e1000e_pm_resume(struct device *dev) struct e1000_hw *hw = &adapter->hw; int rc; + if (dev_pm_skip_resume(dev)) + return 0; + /* Introduce S0ix implementation */ if (hw->mac.type >= e1000_pch_cnp && !e1000e_check_me(hw->adapter->pdev->device)) @@ -7665,7 +7676,8 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) e1000_print_device_info(adapter); - dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE); + dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NO_DIRECT_COMPLETE | + DPM_FLAG_SMART_SUSPEND | DPM_FLAG_MAY_SKIP_RESUME); if (pci_dev_run_wake(pdev) && hw->mac.type < e1000_pch_cnp) pm_runtime_put_noidle(&pdev->dev);