From patchwork Tue Aug 24 20:42:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tony Nguyen X-Patchwork-Id: 12455799 X-Patchwork-Delegate: bhelgaas@google.com 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=-16.7 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 8D143C43214 for ; Tue, 24 Aug 2021 20:39:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 71EE5611C8 for ; Tue, 24 Aug 2021 20:39:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234765AbhHXUkC (ORCPT ); Tue, 24 Aug 2021 16:40:02 -0400 Received: from mga18.intel.com ([134.134.136.126]:49509 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235258AbhHXUkB (ORCPT ); Tue, 24 Aug 2021 16:40:01 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10086"; a="204530932" X-IronPort-AV: E=Sophos;i="5.84,348,1620716400"; d="scan'208";a="204530932" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2021 13:39:16 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.84,348,1620716400"; d="scan'208";a="526819953" Received: from anguy11-desk2.jf.intel.com ([10.166.244.147]) by FMSMGA003.fm.intel.com with ESMTP; 24 Aug 2021 13:39:16 -0700 From: Tony Nguyen To: davem@davemloft.net, kuba@kernel.org Cc: Vinicius Costa Gomes , netdev@vger.kernel.org, anthony.l.nguyen@intel.com, bhelgaas@google.com, linux-pci@vger.kernel.org, sasha.neftin@intel.com, vitaly.lifshits@intel.com, richardcochran@gmail.com Subject: [PATCH net-next 2/4] PCI: Add pcie_ptm_enabled() Date: Tue, 24 Aug 2021 13:42:46 -0700 Message-Id: <20210824204248.2957134-3-anthony.l.nguyen@intel.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210824204248.2957134-1-anthony.l.nguyen@intel.com> References: <20210824204248.2957134-1-anthony.l.nguyen@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Vinicius Costa Gomes Add a predicate that returns if PCIe PTM (Precision Time Measurement) is enabled. It will only return true if it's enabled in all the ports in the path from the device to the root. Signed-off-by: Vinicius Costa Gomes Acked-by: Bjorn Helgaas Signed-off-by: Tony Nguyen --- drivers/pci/pcie/ptm.c | 9 +++++++++ include/linux/pci.h | 3 +++ 2 files changed, 12 insertions(+) diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c index 95d4eef2c9e8..8a4ad974c5ac 100644 --- a/drivers/pci/pcie/ptm.c +++ b/drivers/pci/pcie/ptm.c @@ -204,3 +204,12 @@ int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) return 0; } EXPORT_SYMBOL(pci_enable_ptm); + +bool pcie_ptm_enabled(struct pci_dev *dev) +{ + if (!dev) + return false; + + return dev->ptm_enabled; +} +EXPORT_SYMBOL(pcie_ptm_enabled); diff --git a/include/linux/pci.h b/include/linux/pci.h index 21a9d244e4e4..947430637cac 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1622,9 +1622,12 @@ bool pci_ats_disabled(void); #ifdef CONFIG_PCIE_PTM int pci_enable_ptm(struct pci_dev *dev, u8 *granularity); +bool pcie_ptm_enabled(struct pci_dev *dev); #else static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) { return -EINVAL; } +static inline bool pcie_ptm_enabled(struct pci_dev *dev) +{ return false; } #endif void pci_cfg_access_lock(struct pci_dev *dev);