From patchwork Sun Aug 1 14:25:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ameynarkhede03 X-Patchwork-Id: 12412981 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 38960C4338F for ; Sun, 1 Aug 2021 14:26:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2096660C3F for ; Sun, 1 Aug 2021 14:26:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232249AbhHAO0I (ORCPT ); Sun, 1 Aug 2021 10:26:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232196AbhHAO0C (ORCPT ); Sun, 1 Aug 2021 10:26:02 -0400 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [IPv6:2607:f8b0:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09E9CC06175F; Sun, 1 Aug 2021 07:25:54 -0700 (PDT) Received: by mail-pl1-x633.google.com with SMTP id e21so16679054pla.5; Sun, 01 Aug 2021 07:25:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=r29+sUujdKPey6oLGLCs3NweFY8aTssXwj399PyY5uY=; b=KwlRG+sUCcX8tISzPUvUnSuLcdFgjtxRRc9KAz7NVxEPMznzePYn06nGw/FW3tzSCo +qRZiHYRrDGpTEO55JAGfHqNJxGTr4TlhBY/YqwNWi7dGKpmN0U3xcMTUYGsmk4UPWLy pOEhVpQrSsLxnAHZl23MZnYiRBB38bdecFFnmqFnvX1PEx72n0Q8rOI/wdOM0whAo1Ec l2shOqpbXCBe11X4ZeIgUiaVrIW3fq7Klm0RVCKUXD6kPiRt2cRib08eBWGE13KaQnVC X2pukE1pS2sTMmyhNc80Ik0G/ddLifoqm48JCv/KeQEx3llfuK40kOeKGI17kFm7vt0O zysw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=r29+sUujdKPey6oLGLCs3NweFY8aTssXwj399PyY5uY=; b=uW3//qZ+Wco149TcRKBTTxtgT4PhhHhyjVXEFGBEs80CMvjTlmdrnB26rQG7SdF8VP p0tgC8ZX/zvA+OBihobJqzhDgowdLw9ihvbIz5bzRqcuCTMNBHQJY1UIB4H+NN8LZMGc 1wAdfBGYjW/u6eZR6B79FW3pzn6ZHpNH48i3woQSgsyJsnxvW9b43XcIkODC9tKHG+WB fEcffTg30VqQadWOhvt+XMfi1j82a2a57fH5SqyrxTBqHR0/y72wg5Zb7JbBVThETTRd dQ8O1kSPXJgd/fa3mYkej1RtUWSNY4ulZrQPjli6dobr/n3IJQsv4RApq1s1Z6/Zl/fj acEg== X-Gm-Message-State: AOAM530frBPJMoWhp8/TNT5fxojGPSi78wHpzrdlK2GeCrdqrfzCs43o CRcdq4ayeIf7GznaFrmNfDA= X-Google-Smtp-Source: ABdhPJxWiZKdMHwLonlmbEOke5g+8smroGoscvtd5jg/GCkc+v8nV8MQ+Jb7SsIxMQxGZgttJ4RZtA== X-Received: by 2002:aa7:9828:0:b029:3bd:dc3d:de5f with SMTP id q8-20020aa798280000b02903bddc3dde5fmr348440pfl.47.1627827953642; Sun, 01 Aug 2021 07:25:53 -0700 (PDT) Received: from localhost.localdomain ([139.5.31.186]) by smtp.googlemail.com with ESMTPSA id g11sm7740897pju.13.2021.08.01.07.25.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 01 Aug 2021 07:25:53 -0700 (PDT) From: Amey Narkhede To: Bjorn Helgaas Cc: alex.williamson@redhat.com, Raphael Norwitz , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, kw@linux.com, Shanker Donthineni , Sinan Kaya , Len Brown , "Rafael J . Wysocki" Subject: [PATCH v13 7/9] PCI: Setup ACPI fwnode early and at the same time with OF Date: Sun, 1 Aug 2021 19:55:16 +0530 Message-Id: <20210801142518.1224-8-ameynarkhede03@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210801142518.1224-1-ameynarkhede03@gmail.com> References: <20210801142518.1224-1-ameynarkhede03@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Shanker Donthineni The pci_dev objects are created through two mechanisms 1) during PCI bus scan and 2) from I/O Virtualization. The fwnode in pci_dev object is being set at different places depends on the type of firmware used, device creation mechanism, and acpi_pci_bridge_d3(). The software features which have a dependency on ACPI fwnode properties and need to be handled before device_add() will not work. One use case, the software has to check the existence of _RST method to support ACPI based reset method. This patch does the two changes in order to provide fwnode consistently. - Set ACPI and OF fwnodes from pci_setup_device(). - Remove pci_set_acpi_fwnode() in acpi_pci_bridge_d3(). After this patch, ACPI/OF firmware properties are visible at the same time during the early stage of pci_dev setup. And also call sites should be able to use firmware agnostic functions device_property_xxx() for the early PCI quirks in the future. Signed-off-by: Shanker Donthineni Reviewed-by: Alex Williamson --- drivers/pci/pci-acpi.c | 1 - drivers/pci/probe.c | 7 ++++--- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index eaddbf701759..dae021322b3f 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -952,7 +952,6 @@ static bool acpi_pci_bridge_d3(struct pci_dev *dev) return false; /* Assume D3 support if the bridge is power-manageable by ACPI. */ - pci_set_acpi_fwnode(dev); adev = ACPI_COMPANION(&dev->dev); if (adev && acpi_device_power_manageable(adev)) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 379e85037d9b..15a6975d3757 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1789,6 +1789,9 @@ int pci_setup_device(struct pci_dev *dev) dev->error_state = pci_channel_io_normal; set_pcie_port_type(dev); + pci_set_of_node(dev); + pci_set_acpi_fwnode(dev); + pci_dev_assign_slot(dev); /* @@ -1924,6 +1927,7 @@ int pci_setup_device(struct pci_dev *dev) default: /* unknown header */ pci_err(dev, "unknown header type %02x, ignoring device\n", dev->hdr_type); + pci_release_of_node(dev); return -EIO; bad: @@ -2351,10 +2355,7 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn) dev->vendor = l & 0xffff; dev->device = (l >> 16) & 0xffff; - pci_set_of_node(dev); - if (pci_setup_device(dev)) { - pci_release_of_node(dev); pci_bus_put(dev->bus); kfree(dev); return NULL;