From patchwork Fri Jun 4 22:09:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vinicius Costa Gomes X-Patchwork-Id: 454527 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 7C1B9C4743E for ; Fri, 4 Jun 2021 22:10:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6293C61406 for ; Fri, 4 Jun 2021 22:10:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231623AbhFDWMC (ORCPT ); Fri, 4 Jun 2021 18:12:02 -0400 Received: from mga05.intel.com ([192.55.52.43]:24251 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229930AbhFDWLx (ORCPT ); Fri, 4 Jun 2021 18:11:53 -0400 IronPort-SDR: e+dNJ09oymJqK2Bb81/QRmJgdE55O69ETcpu16iUAtZR6vYBqdOO5WbNRTrRGQGKZDxWl859O8 OTKlbvu6kJMA== X-IronPort-AV: E=McAfee;i="6200,9189,10005"; a="290007348" X-IronPort-AV: E=Sophos;i="5.83,249,1616482800"; d="scan'208";a="290007348" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2021 15:10:06 -0700 IronPort-SDR: xuzL01V2nMA+eYKEDD5UdRsBwS51/ycgmAtkBQ4qOxUrH7d9tdB60HkynLeFFHmyK+EvmXHFnA Ya9HAbcsHN7w== X-IronPort-AV: E=Sophos;i="5.83,249,1616482800"; d="scan'208";a="439326618" Received: from lmrivera-mobl.amr.corp.intel.com (HELO localhost.localdomain) ([10.251.24.65]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 Jun 2021 15:10:05 -0700 From: Vinicius Costa Gomes To: intel-wired-lan@lists.osuosl.org Cc: Vinicius Costa Gomes , sasha.neftin@intel.com, anthony.l.nguyen@intel.com, linux-pci@vger.kernel.org, bhelgaas@google.com, netdev@vger.kernel.org, mlichvar@redhat.com, richardcochran@gmail.com, hch@infradead.org, helgaas@kernel.org Subject: [PATCH next-queue v4 2/4] PCI: Add pcie_ptm_enabled() Date: Fri, 4 Jun 2021 15:09:31 -0700 Message-Id: <20210604220933.3974558-3-vinicius.gomes@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210604220933.3974558-1-vinicius.gomes@intel.com> References: <20210604220933.3974558-1-vinicius.gomes@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Adds 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 --- 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 a687dda262dd..fe7f264b2b15 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1619,9 +1619,12 @@ 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);