From patchwork Wed Apr 19 04:19:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lizhi Hou X-Patchwork-Id: 85178 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp92514vqo; Tue, 18 Apr 2023 21:28:17 -0700 (PDT) X-Google-Smtp-Source: AKy350aXbcE+US0GAaxduGvhM8V+Xiu+GuH7EpyzohUB6trzlJ5aiNmH9oqT7NHK+cfpcTQQ048S X-Received: by 2002:a05:6a21:339a:b0:f0:6aaf:1abf with SMTP id yy26-20020a056a21339a00b000f06aaf1abfmr2073829pzb.4.1681878497210; Tue, 18 Apr 2023 21:28:17 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1681878497; cv=pass; d=google.com; s=arc-20160816; b=0tgdjXPpfpgpQp4FvDN5RFqTLXQEa5yAfMjd93WkClIWbfx/400C4CQ5RS8QeYslsb CfBrdGcjqCLddN43O/27CVjmXDDUTvcs0qQoTcDpl5QU4nCiaUqdvLiYSjunOGVvLhlG aBMFwHys2lsnpn9xlVujYO1zfzUf2AiMXhI+71qNMYY7x9+ZsSnw5yuLolnQTl5cBVRi CqZHL7B6BTTOciMhipC3R98kt2k/rDnA5Z4Plqz9OU+FKuewLrVOCB7uvXVxsYUmiad0 pGMcn4YMKJGbd2FwZ4AbAp+Uka294OFHzzqAFlwEqeyjqntHYGkUT/NPhcunRb5IJbH1 wyTQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:references:in-reply-to:message-id :date:subject:cc:to:from:dkim-signature; bh=GpqAcMYFYggJ/b//4gdXumiD0SS/saGrVQc4NvG6BgU=; b=M0KqaSl91/s7G122dCPI9CMxZGjFZDkZI662hXsuAIyyNL+YHaCOHcliicrgCDCczN iGgoqTRlGuwP8LFEGu71EM4i0A0WcaJ8QzFDp260PXIlCNZjNlw+lw/oHe7yWDt2Sp+4 qQfpr2E9mr34OXgVIIZDMK3mIlp1sE2UcMaUdJ+My133O3BYC+y5alTO5aC4tb49vK06 XKKHkqkeyvZBRohNz4bLIgWQWkX0QWCBarDJ0z4VfB5IhqzAGku4IPVC8lCErKT7jMTL Pq4nq2N0cbq/e/bzCFJ99a4xnSajTVYXavdlnQ5tjhzYKEJsWttVv/JeKLiwiS80GOod T5EQ== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=J+n4wzW5; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id bv184-20020a632ec1000000b00517d81adf00si14889605pgb.624.2023.04.18.21.28.04; Tue, 18 Apr 2023 21:28:17 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=J+n4wzW5; arc=pass (i=1 spf=pass spfdomain=amd.com dmarc=pass fromdomain=amd.com); spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=amd.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232051AbjDSEUs (ORCPT + 99 others); Wed, 19 Apr 2023 00:20:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232292AbjDSEUi (ORCPT ); Wed, 19 Apr 2023 00:20:38 -0400 Received: from NAM12-BN8-obe.outbound.protection.outlook.com (mail-bn8nam12on2041.outbound.protection.outlook.com [40.107.237.41]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 84B4359F0; Tue, 18 Apr 2023 21:20:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=cKWM6bPYnrwposNpFOoenUHhI2qguMAzY5RBbL+gKxUpygV7smkpYu6d7q1iykEdCZxnP0Dko8Y53tMQsPPQvPgB/UYPN4S48yxfNiMW7kEJKnQ47NKIyAS/4I408jCeV0W2WGsnZssFh5gsqsRaJj2zzFoIPEVHIHKaukwi+Tci/lubVAklLYyeT6gDzaZUqijsdjb4I9e3zTZTX595vaMTxIZdDEj52ios5uZMGqguPdOsEtp5rx/56W7tEowIEBwbBGo4hOt9wGtkazTFKkdAwBbveEZciluWlfp6/h8bd1gi7lvcQLdIfQR9pY6JgwUEmEj2igDFJJvvZcXmRA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=GpqAcMYFYggJ/b//4gdXumiD0SS/saGrVQc4NvG6BgU=; b=besXI6G5UAC447uRuSTx8aHw3McuBEU4GCI+512NuMzymmGqbNpkMhI36UkKyqL7NRK1nRCt34D1MnH8YnveDIq/zX21G/pMBWbkNZqVszi74gdP7lMIqBbUHMuAu3yNhHF9JOeobdPs2dUlO6UYCYlEhGpOWJW9PBt1IMN52CZMwUlSl75x1yEfSHIdRZ9lI8UF4njhbZ2voGIzU/qnaLVrkFkz+oqHybECDblWNoaq7dJxtK5o/Nv+k8p0ss18H8bxFRefDmeHdaqIk9GppRCcOfyEjHdAWAHtcnuNeSloL8EEh6493r6QqiXHxIONi4v9Yt8i9jyldb5Ruq5Jpg== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=GpqAcMYFYggJ/b//4gdXumiD0SS/saGrVQc4NvG6BgU=; b=J+n4wzW5UW1xe2Ks5/nDi5cblLNuHKRmryo9t5nk9ZDBDIv20sKoH2Vw3rpAegANtcTpuXq+rc9z0QKyZ4VWp+YZR+3l+R0ZhOAcrQjixJlrVsieaH+A+HgEZ/7PD50j3nHVQTyhnJTdxrL8BJVHknib/5hxaH/J99rPGsy0kbI= Received: from MW4PR04CA0231.namprd04.prod.outlook.com (2603:10b6:303:87::26) by SJ0PR12MB7035.namprd12.prod.outlook.com (2603:10b6:a03:47c::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6319.20; Wed, 19 Apr 2023 04:20:31 +0000 Received: from CO1NAM11FT095.eop-nam11.prod.protection.outlook.com (2603:10b6:303:87:cafe::35) by MW4PR04CA0231.outlook.office365.com (2603:10b6:303:87::26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6298.47 via Frontend Transport; Wed, 19 Apr 2023 04:20:31 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB03.amd.com; pr=C Received: from SATLEXMB03.amd.com (165.204.84.17) by CO1NAM11FT095.mail.protection.outlook.com (10.13.174.179) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6319.22 via Frontend Transport; Wed, 19 Apr 2023 04:20:31 +0000 Received: from SATLEXMB07.amd.com (10.181.41.45) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Tue, 18 Apr 2023 23:20:29 -0500 Received: from SATLEXMB04.amd.com (10.181.40.145) by SATLEXMB07.amd.com (10.181.41.45) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Tue, 18 Apr 2023 21:20:29 -0700 Received: from xsjlizhih40.xilinx.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server id 15.1.2375.34 via Frontend Transport; Tue, 18 Apr 2023 23:20:28 -0500 From: Lizhi Hou To: , , , , , CC: Lizhi Hou , , , , , , , Subject: [PATCH V8 2/3] PCI: Create device tree node for selected devices Date: Tue, 18 Apr 2023 21:19:53 -0700 Message-ID: <1681877994-16487-3-git-send-email-lizhi.hou@amd.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1681877994-16487-1-git-send-email-lizhi.hou@amd.com> References: <1681877994-16487-1-git-send-email-lizhi.hou@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1NAM11FT095:EE_|SJ0PR12MB7035:EE_ X-MS-Office365-Filtering-Correlation-Id: fef70e87-135a-4f80-3a55-08db408d69df X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(136003)(346002)(39860400002)(396003)(376002)(451199021)(36840700001)(46966006)(40470700004)(40480700001)(40460700003)(81166007)(316002)(4326008)(70206006)(70586007)(478600001)(41300700001)(110136005)(54906003)(44832011)(82740400003)(8676002)(8936002)(5660300002)(356005)(186003)(47076005)(36860700001)(336012)(426003)(83380400001)(2616005)(6666004)(26005)(86362001)(82310400005)(36756003)(30864003)(2906002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Apr 2023 04:20:31.2298 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fef70e87-135a-4f80-3a55-08db408d69df X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT095.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB7035 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763577426923416639?= X-GMAIL-MSGID: =?utf-8?q?1763577426923416639?= The PCI endpoint device such as Xilinx Alveo PCI card maps the register spaces from multiple hardware peripherals to its PCI BAR. Normally, the PCI core discovers devices and BARs using the PCI enumeration process. There is no infrastructure to discover the hardware peripherals that are present in a PCI device, and which can be accessed through the PCI BARs. For Alveo PCI card, the card firmware provides a flattened device tree to describe the hardware peripherals on its BARs. The Alveo card driver can load this flattened device tree and leverage device tree framework to generate platform devices for the hardware peripherals eventually. Apparently, the device tree framework requires a device tree node for the PCI device. Thus, it can generate the device tree nodes for hardware peripherals underneath. Because PCI is self discoverable bus, there might not be a device tree node created for PCI devices. This patch is to add support to generate device tree node for PCI devices. Added a kernel option. When the option is turned on, the kernel will generate device tree nodes for PCI bridges unconditionally. Initially, the basic properties are added for the dynamically generated device tree nodes. Signed-off-by: Lizhi Hou --- drivers/pci/Kconfig | 12 ++ drivers/pci/Makefile | 1 + drivers/pci/bus.c | 2 + drivers/pci/msi/irqdomain.c | 6 +- drivers/pci/of.c | 79 ++++++++++++++ drivers/pci/of_property.c | 212 ++++++++++++++++++++++++++++++++++++ drivers/pci/pci-driver.c | 3 +- drivers/pci/pci.h | 19 ++++ drivers/pci/remove.c | 1 + 9 files changed, 332 insertions(+), 3 deletions(-) create mode 100644 drivers/pci/of_property.c diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig index 9309f2469b41..24c3107c68cc 100644 --- a/drivers/pci/Kconfig +++ b/drivers/pci/Kconfig @@ -193,6 +193,18 @@ config PCI_HYPERV The PCI device frontend driver allows the kernel to import arbitrary PCI devices from a PCI backend to support PCI driver domains. +config PCI_DYNAMIC_OF_NODES + bool "Create Devicetree nodes for PCI devices" + depends on OF + select OF_DYNAMIC + help + This option enables support for generating device tree nodes for some + PCI devices. Thus, the driver of this kind can load and overlay + flattened device tree for its downstream devices. + + Once this option is selected, the device tree nodes will be generated + for all PCI bridges. + choice prompt "PCI Express hierarchy optimization setting" default PCIE_BUS_DEFAULT diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile index 2680e4c92f0a..cc8b4e01e29d 100644 --- a/drivers/pci/Makefile +++ b/drivers/pci/Makefile @@ -32,6 +32,7 @@ obj-$(CONFIG_PCI_P2PDMA) += p2pdma.o obj-$(CONFIG_XEN_PCIDEV_FRONTEND) += xen-pcifront.o obj-$(CONFIG_VGA_ARB) += vgaarb.o obj-$(CONFIG_PCI_DOE) += doe.o +obj-$(CONFIG_PCI_DYNAMIC_OF_NODES) += of_property.o # Endpoint library must be initialized before its users obj-$(CONFIG_PCI_ENDPOINT) += endpoint/ diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c index 549c4bd5caec..89ef8c64bb22 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -341,6 +341,8 @@ void pci_bus_add_device(struct pci_dev *dev) */ pcibios_bus_add_device(dev); pci_fixup_device(pci_fixup_final, dev); + if (pci_is_bridge(dev)) + of_pci_make_dev_node(dev); pci_create_sysfs_dev_files(dev); pci_proc_attach_device(dev); pci_bridge_d3_update(dev); diff --git a/drivers/pci/msi/irqdomain.c b/drivers/pci/msi/irqdomain.c index e33bcc872699..cd73d2250305 100644 --- a/drivers/pci/msi/irqdomain.c +++ b/drivers/pci/msi/irqdomain.c @@ -456,8 +456,10 @@ u32 pci_msi_domain_get_msi_rid(struct irq_domain *domain, struct pci_dev *pdev) pci_for_each_dma_alias(pdev, get_msi_id_cb, &rid); of_node = irq_domain_get_of_node(domain); - rid = of_node ? of_msi_map_id(&pdev->dev, of_node, rid) : - iort_msi_map_id(&pdev->dev, rid); + if (of_node && !of_node_check_flag(of_node, OF_DYNAMIC)) + rid = of_msi_map_id(&pdev->dev, of_node, rid); + else + rid = iort_msi_map_id(&pdev->dev, rid); return rid; } diff --git a/drivers/pci/of.c b/drivers/pci/of.c index 196834ed44fe..42a5cfac2d34 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -469,6 +469,8 @@ static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args * } else { /* We found a P2P bridge, check if it has a node */ ppnode = pci_device_to_OF_node(ppdev); + if (ppnode && of_node_check_flag(ppnode, OF_DYNAMIC)) + ppnode = NULL; } /* @@ -599,6 +601,83 @@ int devm_of_pci_bridge_init(struct device *dev, struct pci_host_bridge *bridge) return pci_parse_request_of_pci_ranges(dev, bridge); } +#if IS_ENABLED(CONFIG_PCI_DYNAMIC_OF_NODES) + +void of_pci_remove_node(struct pci_dev *pdev) +{ + struct device_node *np; + + np = pci_device_to_OF_node(pdev); + if (!np || !of_node_check_flag(np, OF_DYNAMIC)) + return; + pdev->dev.of_node = NULL; + + of_changeset_revert(np->data); + of_changeset_destroy(np->data); + of_node_put(np); +} + +void of_pci_make_dev_node(struct pci_dev *pdev) +{ + struct device_node *ppnode, *np = NULL; + const char *pci_type = "dev"; + struct of_changeset *cset; + const char *name; + int ret; + + /* + * If there is already a device tree node linked to this device, + * return immediately. + */ + if (pci_device_to_OF_node(pdev)) + return; + + /* Check if there is device tree node for parent device */ + if (!pdev->bus->self) + ppnode = pdev->bus->dev.of_node; + else + ppnode = pdev->bus->self->dev.of_node; + if (!ppnode) + return; + + if (pci_is_bridge(pdev)) + pci_type = "pci"; + + name = kasprintf(GFP_KERNEL, "%s@%x,%x", pci_type, + PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)); + if (!name) + return; + + cset = kmalloc(sizeof(*cset), GFP_KERNEL); + if (!cset) + goto failed; + of_changeset_init(cset); + + np = of_changeset_create_node(ppnode, name, cset); + if (!np) + goto failed; + np->data = cset; + + ret = of_pci_add_properties(pdev, cset, np); + if (ret) + goto failed; + + ret = of_changeset_apply(cset); + if (ret) + goto failed; + + pdev->dev.of_node = np; + kfree(name); + + return; + +failed: + if (np) + of_node_put(np); + kfree(name); +} +#endif + #endif /* CONFIG_PCI */ /** diff --git a/drivers/pci/of_property.c b/drivers/pci/of_property.c new file mode 100644 index 000000000000..3d8267aa96e2 --- /dev/null +++ b/drivers/pci/of_property.c @@ -0,0 +1,212 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2022, Advanced Micro Devices, Inc. + */ + +#include +#include +#include +#include +#include "pci.h" + +#define OF_PCI_ADDRESS_CELLS 3 +#define OF_PCI_SIZE_CELLS 2 + +struct of_pci_addr_pair { + u32 phys_addr[OF_PCI_ADDRESS_CELLS]; + u32 size[OF_PCI_SIZE_CELLS]; +}; + +struct of_pci_range { + u32 child_addr[OF_PCI_ADDRESS_CELLS]; + u32 parent_addr[OF_PCI_ADDRESS_CELLS]; + u32 size[OF_PCI_SIZE_CELLS]; +}; + +#define OF_PCI_ADDR_SPACE_IO 0x1 +#define OF_PCI_ADDR_SPACE_MEM32 0x2 +#define OF_PCI_ADDR_SPACE_MEM64 0x3 + +#define OF_PCI_ADDR_FIELD_NONRELOC BIT(31) +#define OF_PCI_ADDR_FIELD_SS GENMASK(25, 24) +#define OF_PCI_ADDR_FIELD_PREFETCH BIT(30) +#define OF_PCI_ADDR_FIELD_BUS GENMASK(23, 16) +#define OF_PCI_ADDR_FIELD_DEV GENMASK(15, 11) +#define OF_PCI_ADDR_FIELD_FUNC GENMASK(10, 8) +#define OF_PCI_ADDR_FIELD_REG GENMASK(7, 0) + +#define OF_PCI_ADDR_HI GENMASK_ULL(63, 32) +#define OF_PCI_ADDR_LO GENMASK_ULL(31, 0) +#define OF_PCI_SIZE_HI GENMASK_ULL(63, 32) +#define OF_PCI_SIZE_LO GENMASK_ULL(31, 0) + +enum of_pci_prop_compatible { + PROP_COMPAT_PCI_VVVV_DDDD, + PROP_COMPAT_PCICLASS_CCSSPP, + PROP_COMPAT_PCICLASS_CCSS, + PROP_COMPAT_NUM, +}; + +static void of_pci_set_address(struct pci_dev *pdev, u32 *prop, u64 addr, + u32 reg_num, u32 flags, bool reloc) +{ + prop[0] = FIELD_PREP(OF_PCI_ADDR_FIELD_BUS, pdev->bus->number) | + FIELD_PREP(OF_PCI_ADDR_FIELD_DEV, PCI_SLOT(pdev->devfn)) | + FIELD_PREP(OF_PCI_ADDR_FIELD_FUNC, PCI_FUNC(pdev->devfn)); + prop[0] |= flags | reg_num; + if (!reloc) { + prop[0] |= OF_PCI_ADDR_FIELD_NONRELOC; + prop[1] = FIELD_GET(OF_PCI_ADDR_HI, addr); + prop[2] = FIELD_GET(OF_PCI_ADDR_LO, addr); + } +} + +static int of_pci_get_addr_flags(struct resource *res, u32 *flags) +{ + u32 ss; + + if (res->flags & IORESOURCE_IO) + ss = OF_PCI_ADDR_SPACE_IO; + else if (res->flags & IORESOURCE_MEM_64) + ss = OF_PCI_ADDR_SPACE_MEM64; + else if (res->flags & IORESOURCE_MEM) + ss = OF_PCI_ADDR_SPACE_MEM32; + else + return -EINVAL; + + *flags = 0; + if (res->flags & IORESOURCE_PREFETCH) + *flags |= OF_PCI_ADDR_FIELD_PREFETCH; + + *flags |= FIELD_PREP(OF_PCI_ADDR_FIELD_SS, ss); + + return 0; +} + +static int of_pci_prop_ranges(struct pci_dev *pdev, struct of_changeset *ocs, + struct device_node *np) +{ + struct of_pci_range *rp; + struct resource *res; + int i = 0, j, ret; + u64 val64; + u32 flags; + + rp = kcalloc(PCI_BRIDGE_RESOURCE_NUM, sizeof(*rp), GFP_KERNEL); + if (!rp) + return -ENOMEM; + + res = &pdev->resource[PCI_BRIDGE_RESOURCES]; + for (j = 0; j < PCI_BRIDGE_RESOURCE_NUM; j++) { + if (!resource_size(&res[j])) + continue; + + if (of_pci_get_addr_flags(&res[j], &flags)) + continue; + + val64 = res[j].start; + of_pci_set_address(pdev, rp[i].parent_addr, val64, 0, flags, + false); + memcpy(rp[i].child_addr, rp[i].parent_addr, + sizeof(rp[i].child_addr)); + + val64 = resource_size(&res[j]); + rp[i].size[0] = FIELD_GET(OF_PCI_SIZE_HI, val64); + rp[i].size[1] = FIELD_GET(OF_PCI_SIZE_LO, val64); + + i++; + } + + ret = of_changeset_add_prop_u32_array(ocs, np, "ranges", (u32 *)rp, + i * sizeof(*rp) / sizeof(u32)); + kfree(rp); + + return ret; +} + +static int of_pci_prop_reg(struct pci_dev *pdev, struct of_changeset *ocs, + struct device_node *np) +{ + struct of_pci_addr_pair *reg; + int i = 1, resno, ret = 0; + u32 flags, base_addr; + resource_size_t sz; + + reg = kcalloc(PCI_STD_NUM_BARS + 1, sizeof(*reg), GFP_KERNEL); + if (!reg) + return -ENOMEM; + + /* configuration space */ + of_pci_set_address(pdev, reg[0].phys_addr, 0, 0, 0, true); + + base_addr = PCI_BASE_ADDRESS_0; + for (resno = PCI_STD_RESOURCES; resno <= PCI_STD_RESOURCE_END; + resno++, base_addr += 4) { + sz = pci_resource_len(pdev, resno); + if (!sz) + continue; + + ret = of_pci_get_addr_flags(&pdev->resource[resno], &flags); + if (ret) + continue; + + of_pci_set_address(pdev, reg[i].phys_addr, 0, base_addr, flags, + true); + reg[i].size[0] = FIELD_GET(OF_PCI_SIZE_HI, (u64)sz); + reg[i].size[1] = FIELD_GET(OF_PCI_SIZE_LO, (u64)sz); + i++; + } + + ret = of_changeset_add_prop_u32_array(ocs, np, "reg", (u32 *)reg, + i * sizeof(*reg) / sizeof(u32)); + kfree(reg); + + return ret; +} + +static int of_pci_prop_compatible(struct pci_dev *pdev, + struct of_changeset *ocs, + struct device_node *np) +{ + const char *compat_strs[PROP_COMPAT_NUM] = { 0 }; + int i, ret; + + compat_strs[PROP_COMPAT_PCI_VVVV_DDDD] = + kasprintf(GFP_KERNEL, "pci%x,%x", pdev->vendor, pdev->device); + compat_strs[PROP_COMPAT_PCICLASS_CCSSPP] = + kasprintf(GFP_KERNEL, "pciclass,%06x", pdev->class); + compat_strs[PROP_COMPAT_PCICLASS_CCSS] = + kasprintf(GFP_KERNEL, "pciclass,%04x", pdev->class >> 8); + + ret = of_changeset_add_prop_string_array(ocs, np, "compatible", + compat_strs, PROP_COMPAT_NUM); + for (i = 0; i < PROP_COMPAT_NUM; i++) + kfree(compat_strs[i]); + + return ret; +} + +int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs, + struct device_node *np) +{ + int ret = 0; + + if (pci_is_bridge(pdev)) { + ret |= of_changeset_add_prop_string(ocs, np, "device_type", + "pci"); + ret |= of_changeset_add_prop_u32(ocs, np, "#address-cells", + OF_PCI_ADDRESS_CELLS); + ret |= of_changeset_add_prop_u32(ocs, np, "#size-cells", + OF_PCI_SIZE_CELLS); + ret |= of_pci_prop_ranges(pdev, ocs, np); + } + + ret |= of_pci_prop_reg(pdev, ocs, np); + ret |= of_pci_prop_compatible(pdev, ocs, np); + + /* + * The added properties will be released when the + * changeset is destroyed. + */ + return ret; +} diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c index 57ddcc59af30..9120ca63a82a 100644 --- a/drivers/pci/pci-driver.c +++ b/drivers/pci/pci-driver.c @@ -1634,7 +1634,8 @@ static int pci_dma_configure(struct device *dev) bridge = pci_get_host_bridge_device(to_pci_dev(dev)); if (IS_ENABLED(CONFIG_OF) && bridge->parent && - bridge->parent->of_node) { + bridge->parent->of_node && + !of_node_check_flag(bridge->parent->of_node, OF_DYNAMIC)) { ret = of_dma_configure(dev, bridge->parent->of_node, true); } else if (has_acpi_companion(bridge)) { struct acpi_device *adev = to_acpi_device_node(bridge->fwnode); diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index d2c08670a20e..58df456e6c92 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -674,6 +674,25 @@ static inline int devm_of_pci_bridge_init(struct device *dev, struct pci_host_br #endif /* CONFIG_OF */ +struct of_changeset; + +#ifdef CONFIG_PCI_DYNAMIC_OF_NODES +void of_pci_make_dev_node(struct pci_dev *pdev); +void of_pci_remove_node(struct pci_dev *pdev); +int of_pci_add_properties(struct pci_dev *pdev, struct of_changeset *ocs, + struct device_node *np); +#else +static inline void +of_pci_make_dev_node(struct pci_dev *pdev) +{ +} + +static inline void +of_pci_remove_node(struct pci_dev *pdev) +{ +} +#endif /* CONFIG_PCI_DYNAMIC_OF_NODES */ + #ifdef CONFIG_PCIEAER void pci_no_aer(void); void pci_aer_init(struct pci_dev *dev); diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c index 0145aef1b930..1462f2d9b194 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -23,6 +23,7 @@ static void pci_stop_dev(struct pci_dev *dev) device_release_driver(&dev->dev); pci_proc_detach_device(dev); pci_remove_sysfs_dev_files(dev); + of_pci_remove_node(dev); pci_dev_assign_added(dev, false); }