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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 17:34:27.5084 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: cbece24e-5f86-4fd3-9b10-08db727dc34d 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D1.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8460 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?1769335476684003522?= X-GMAIL-MSGID: =?utf-8?q?1769335476684003522?= of_changeset_create_node() creates device node dynamically and attaches the newly created node to a changeset. Expand of_changeset APIs to handle specific types of properties. of_changeset_add_prop_string() of_changeset_add_prop_string_array() of_changeset_add_prop_u32_array() Signed-off-by: Clément Léger Signed-off-by: Lizhi Hou --- drivers/of/dynamic.c | 164 ++++++++++++++++++++++++++++++++++++++++++ drivers/of/unittest.c | 19 ++++- include/linux/of.h | 23 ++++++ 3 files changed, 205 insertions(+), 1 deletion(-) diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c index e311d406b170..9259cebda4d6 100644 --- a/drivers/of/dynamic.c +++ b/drivers/of/dynamic.c @@ -487,6 +487,38 @@ struct device_node *__of_node_dup(const struct device_node *np, return NULL; } +/** + * of_changeset_create_node - Dynamically create a device node and attach to + * a given changeset. + * + * @parent: Pointer to parent device node + * @full_name: Node full name + * @cset: Pointer to changeset + * + * Return: Pointer to the created device node or NULL in case of an error. + */ +struct device_node *of_changeset_create_node(struct device_node *parent, + const char *full_name, + struct of_changeset *cset) +{ + struct device_node *np; + int ret; + + np = __of_node_dup(NULL, full_name); + if (!np) + return NULL; + np->parent = parent; + + ret = of_changeset_attach_node(cset, np); + if (ret) { + of_node_put(np); + return NULL; + } + + return np; +} +EXPORT_SYMBOL(of_changeset_create_node); + static void __of_changeset_entry_destroy(struct of_changeset_entry *ce) { if (ce->action == OF_RECONFIG_ATTACH_NODE && @@ -960,3 +992,135 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action, return 0; } EXPORT_SYMBOL_GPL(of_changeset_action); + +static int of_changeset_add_prop_helper(struct of_changeset *ocs, + struct device_node *np, + const struct property *pp) +{ + struct property *new_pp; + int ret; + + new_pp = __of_prop_dup(pp, GFP_KERNEL); + if (!new_pp) + return -ENOMEM; + + ret = of_changeset_add_property(ocs, np, new_pp); + if (ret) { + kfree(new_pp->name); + kfree(new_pp->value); + kfree(new_pp); + } + + return ret; +} + +/** + * of_changeset_add_prop_string - Add a string property to a changeset + * + * @ocs: changeset pointer + * @np: device node pointer + * @prop_name: name of the property to be added + * @str: pointer to null terminated string + * + * Create a string property and add it to a changeset. + * + * Return: 0 on success, a negative error value in case of an error. + */ +int of_changeset_add_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str) +{ + struct property prop; + + prop.name = (char *)prop_name; + prop.length = strlen(str) + 1; + prop.value = (void *)str; + + return of_changeset_add_prop_helper(ocs, np, &prop); +} +EXPORT_SYMBOL_GPL(of_changeset_add_prop_string); + +/** + * of_changeset_add_prop_string_array - Add a string list property to + * a changeset + * + * @ocs: changeset pointer + * @np: device node pointer + * @prop_name: name of the property to be added + * @str_array: pointer to an array of null terminated strings + * @sz: number of string array elements + * + * Create a string list property and add it to a changeset. + * + * Return: 0 on success, a negative error value in case of an error. + */ +int of_changeset_add_prop_string_array(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, + const char **str_array, size_t sz) +{ + struct property prop; + int i, ret; + char *vp; + + prop.name = (char *)prop_name; + + prop.length = 0; + for (i = 0; i < sz; i++) + prop.length += strlen(str_array[i]) + 1; + + prop.value = kmalloc(prop.length, GFP_KERNEL); + if (!prop.value) + return -ENOMEM; + + vp = prop.value; + for (i = 0; i < sz; i++) { + vp += snprintf(vp, (char *)prop.value + prop.length - vp, "%s", + str_array[i]) + 1; + } + ret = of_changeset_add_prop_helper(ocs, np, &prop); + kfree(prop.value); + + return ret; +} +EXPORT_SYMBOL_GPL(of_changeset_add_prop_string_array); + +/** + * of_changeset_add_prop_u32_array - Add a property of 32 bit integers + * property to a changeset + * + * @ocs: changeset pointer + * @np: device node pointer + * @prop_name: name of the property to be added + * @array: pointer to an array of 32 bit integers + * @sz: number of array elements + * + * Create a property of 32 bit integers and add it to a changeset. + * + * Return: 0 on success, a negative error value in case of an error. + */ +int of_changeset_add_prop_u32_array(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, + const u32 *array, size_t sz) +{ + struct property prop; + __be32 *val; + int i, ret; + + val = kcalloc(sz, sizeof(__be32), GFP_KERNEL); + if (!val) + return -ENOMEM; + + for (i = 0; i < sz; i++) + val[i] = cpu_to_be32(array[i]); + prop.name = (char *)prop_name; + prop.length = sizeof(u32) * sz; + prop.value = (void *)val; + + ret = of_changeset_add_prop_helper(ocs, np, &prop); + kfree(val); + + return ret; +} +EXPORT_SYMBOL_GPL(of_changeset_add_prop_u32_array); diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 2191c0136531..1193a574fa36 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -802,7 +802,9 @@ static void __init of_unittest_changeset(void) struct property *ppname_n21, pname_n21 = { .name = "name", .length = 3, .value = "n21" }; struct property *ppupdate, pupdate = { .name = "prop-update", .length = 5, .value = "abcd" }; struct property *ppremove; - struct device_node *n1, *n2, *n21, *nchangeset, *nremove, *parent, *np; + struct device_node *n1, *n2, *n21, *n22, *nchangeset, *nremove, *parent, *np; + static const char * const str_array[] = { "str1", "str2", "str3" }; + const u32 u32_array[] = { 1, 2, 3 }; struct of_changeset chgset; n1 = __of_node_dup(NULL, "n1"); @@ -857,6 +859,17 @@ static void __init of_unittest_changeset(void) unittest(!of_changeset_add_property(&chgset, parent, ppadd), "fail add prop prop-add\n"); unittest(!of_changeset_update_property(&chgset, parent, ppupdate), "fail update prop\n"); unittest(!of_changeset_remove_property(&chgset, parent, ppremove), "fail remove prop\n"); + n22 = of_changeset_create_node(n2, "n22", &chgset); + unittest(n22, "fail create n22\n"); + unittest(!of_changeset_add_prop_string(&chgset, n22, "prop-str", "abcd"), + "fail add prop prop-str"); + unittest(!of_changeset_add_prop_string_array(&chgset, n22, "prop-str-array", + (const char **)str_array, + ARRAY_SIZE(str_array)), + "fail add prop prop-str-array"); + unittest(!of_changeset_add_prop_u32_array(&chgset, n22, "prop-u32-array", + u32_array, ARRAY_SIZE(u32_array)), + "fail add prop prop-u32-array"); unittest(!of_changeset_apply(&chgset), "apply failed\n"); @@ -866,6 +879,9 @@ static void __init of_unittest_changeset(void) unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n21")), "'%pOF' not added\n", n21); of_node_put(np); + unittest((np = of_find_node_by_path("/testcase-data/changeset/n2/n22")), + "'%pOF' not added\n", n22); + of_node_put(np); unittest(!of_changeset_revert(&chgset), "revert failed\n"); @@ -874,6 +890,7 @@ static void __init of_unittest_changeset(void) of_node_put(n1); of_node_put(n2); of_node_put(n21); + of_node_put(n22); #endif } diff --git a/include/linux/of.h b/include/linux/of.h index 6ecde0515677..82d0a476ec75 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1580,6 +1580,29 @@ static inline int of_changeset_update_property(struct of_changeset *ocs, { return of_changeset_action(ocs, OF_RECONFIG_UPDATE_PROPERTY, np, prop); } + +struct device_node *of_changeset_create_node(struct device_node *parent, + const char *full_name, + struct of_changeset *cset); +int of_changeset_add_prop_string(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, const char *str); +int of_changeset_add_prop_string_array(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, + const char **str_array, size_t sz); +int of_changeset_add_prop_u32_array(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, + const u32 *array, size_t sz); +static inline int of_changeset_add_prop_u32(struct of_changeset *ocs, + struct device_node *np, + const char *prop_name, + const u32 val) +{ + return of_changeset_add_prop_u32_array(ocs, np, prop_name, &val, 1); +} + #else /* CONFIG_OF_DYNAMIC */ static inline int of_reconfig_notifier_register(struct notifier_block *nb) { From patchwork Wed Jun 21 17:34:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lizhi Hou X-Patchwork-Id: 111212 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp4534592vqr; Wed, 21 Jun 2023 10:41:26 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5JbJ5WvMdEshtZweSMSbNdYF4QWPLw8RONSpsLh61P28Br5Hx3uNB7nKJvfGT68aW27pFS X-Received: by 2002:a17:903:278e:b0:1b3:cd90:79bb with SMTP id jw14-20020a170903278e00b001b3cd9079bbmr9751216plb.25.1687369285916; 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Wed, 21 Jun 2023 12:34:28 -0500 Received: from xsjlizhih40.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.23 via Frontend Transport; Wed, 21 Jun 2023 12:34:27 -0500 From: Lizhi Hou To: , , , CC: Lizhi Hou , , , Subject: [PATCH V9 2/5] PCI: Create device tree node for selected devices Date: Wed, 21 Jun 2023 10:34:06 -0700 Message-ID: <1687368849-36722-3-git-send-email-lizhi.hou@amd.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1687368849-36722-1-git-send-email-lizhi.hou@amd.com> References: <1687368849-36722-1-git-send-email-lizhi.hou@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D2:EE_|PH8PR12MB6746:EE_ X-MS-Office365-Filtering-Correlation-Id: 41f22cd8-bb3c-45e9-49ac-08db727dc3fc 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:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(376002)(39860400002)(346002)(136003)(396003)(451199021)(46966006)(40470700004)(36840700001)(40460700003)(70586007)(70206006)(4326008)(83380400001)(2616005)(356005)(81166007)(82310400005)(186003)(86362001)(36860700001)(82740400003)(47076005)(110136005)(26005)(426003)(336012)(478600001)(54906003)(36756003)(6666004)(40480700001)(2906002)(41300700001)(30864003)(8936002)(44832011)(5660300002)(8676002)(316002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 17:34:28.6532 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 41f22cd8-bb3c-45e9-49ac-08db727dc3fc 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D2.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6746 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?1769334936294384275?= X-GMAIL-MSGID: =?utf-8?q?1769334936294384275?= 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/of.c | 81 +++++++++++++++- drivers/pci/of_property.c | 194 ++++++++++++++++++++++++++++++++++++++ drivers/pci/pci.h | 19 ++++ drivers/pci/remove.c | 1 + 7 files changed, 309 insertions(+), 1 deletion(-) 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 5bc81cc0a2de..ab7d06cd0099 100644 --- a/drivers/pci/bus.c +++ b/drivers/pci/bus.c @@ -340,6 +340,8 @@ 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/of.c b/drivers/pci/of.c index 2c25f4fa0225..01818b27a8da 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -501,8 +501,10 @@ static int of_irq_parse_pci(const struct pci_dev *pdev, struct of_phandle_args * * to rely on this function (you ship a firmware that doesn't * create device nodes for all PCI devices). */ - if (ppnode) + if (ppnode && of_property_present(ppnode, "interrupt-map")) break; + else + ppnode = NULL; /* * We can only get here if we hit a P2P bridge with no node; @@ -617,6 +619,83 @@ 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..a48d3a5a3685 --- /dev/null +++ b/drivers/pci/of_property.c @@ -0,0 +1,194 @@ +// 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) + +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] = upper_32_bits(addr); + prop[2] = lower_32_bits(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; + u32 flags, num; + u64 val64; + + if (pci_is_bridge(pdev)) { + num = PCI_BRIDGE_RESOURCE_NUM; + res = &pdev->resource[PCI_BRIDGE_RESOURCES]; + } else { + num = PCI_STD_NUM_BARS; + res = &pdev->resource[PCI_STD_RESOURCES]; + } + + rp = kcalloc(num, sizeof(*rp), GFP_KERNEL); + if (!rp) + return -ENOMEM; + + for (j = 0; j < 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); + if (pci_is_bridge(pdev)) { + memcpy(rp[i].child_addr, rp[i].parent_addr, + sizeof(rp[i].child_addr)); + } else { + /* + * For endpoint device, the lower 64-bits of child + * address is always zero. + */ + rp[i].child_addr[0] = j; + } + + val64 = resource_size(&res[j]); + rp[i].size[0] = upper_32_bits(val64); + rp[i].size[1] = lower_32_bits(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; + + /* configuration space */ + of_pci_set_address(pdev, reg.phys_addr, 0, 0, 0, true); + + return of_changeset_add_prop_u32_array(ocs, np, "reg", (u32 *)®, + sizeof(reg) / sizeof(u32)); +} + +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_pci_prop_ranges(pdev, ocs, np); + 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_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.h b/drivers/pci/pci.h index 2475098f6518..82cc2b35ff6d 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -678,6 +678,25 @@ 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 d68aee29386b..d749ea8250d6 100644 --- a/drivers/pci/remove.c +++ b/drivers/pci/remove.c @@ -22,6 +22,7 @@ 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); } From patchwork Wed Jun 21 17:34:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lizhi Hou X-Patchwork-Id: 111213 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp4534802vqr; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 17:34:29.5389 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 851cbda5-08fe-40b3-6e57-08db727dc483 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9CE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB6433 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?1769334955014209987?= X-GMAIL-MSGID: =?utf-8?q?1769334955014209987?= The Xilinx Alveo U50 PCI card exposes multiple hardware peripherals on its PCI BAR. The card firmware provides a flattened device tree to describe the hardware peripherals on its BARs. This allows U50 driver to load the flattened device tree and generate the device tree node for hardware peripherals underneath. To generate device tree node for U50 card, added PCI quirks to call of_pci_make_dev_node() for U50. Signed-off-by: Lizhi Hou Acked-by: Bjorn Helgaas --- drivers/pci/quirks.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index c525867760bf..c8f3acea752d 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -6041,3 +6041,14 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2d, dpc_log_size); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a2f, dpc_log_size); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size); #endif + +/* + * For PCI device which have multiple downstream devices, its driver may use + * a flattened device tree to describe the downstream devices. + * To overlay the flattened device tree, the PCI device and all its ancestor + * devices need to have device tree nodes on system base device tree. Thus, + * before driver probing, it might need to add a device tree node as the final + * fixup. + */ +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5020, of_pci_make_dev_node); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5021, of_pci_make_dev_node); From patchwork Wed Jun 21 17:34:08 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lizhi Hou X-Patchwork-Id: 111221 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp4540080vqr; Wed, 21 Jun 2023 10:51:37 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ543cMur/SLr/4Q0NWquVo8V8yJtMXVARsFPgjjK87iX0EQE+31yhFIcgFrp86Zjz2biTky X-Received: by 2002:a05:6808:575:b0:3a0:5541:22f4 with SMTP id j21-20020a056808057500b003a0554122f4mr1304994oig.44.1687369897075; Wed, 21 Jun 2023 10:51:37 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1687369897; cv=pass; d=google.com; s=arc-20160816; b=os9mG6cXY3fUJCsZ67mYLng0RLbRF/rL/4QUV8uUw0uDjH4X4fPcMyP0Jq99PXRiSb yJMEOAMdqJcr85H4MjfNrOH5EZbI9SDKRLNzMPwCT29xUiLzFbdtTAxNuEYZHiDc/WAW DRhI7m3hkHKnEu6ME6PrTXVGIvHPR2Zrx3QvrijABtUspAKuBj1b4ywzAESvAdiKNa5B YfWBkyoEOhTrIIFQx6x+/nAa00v7W7c/BdV/rNC/l6a4iTREX6xnMSZ3c0+thuFDqyNj fWPZkGjvKkNNcHNhh8qDdl88oMtrHvjWuFsWaBYFwbRRRJgwk9tsSo1cJsQAY3v74ROd yvEw== 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=MADuss227WzePRnbWXwwjohHHj2nTjBiOHJxq1H/10o=; b=SxMWcw1+ZogUuUI/RT1WEi+AK6IWQI9JxM+b3ObXZraEy2kXRBR/NQIMkYFaZFUxr0 gWP6FKzAxuUnLNQD/9GAdroB2lZwXNuH9PoyjhPdKk0zpeTvYoqI0U0iO+jPKUnnytIo LjHK1x4HbDEakW1gEKwRBukMimBg2j/J93LRdV6OhDhzSr52pvB2/2oWKaJR8StbAnZ/ XMpLbfwlVLtbY90HZaElifq8gX+Hd7BaJ2/XqhjqJb4xTt/zLgaGvswbuh85V2ktTav6 Co3mipBYb2IRgPTnBGScNIdQS38Lgf/4ZUAlcULWt3nRkBAelTtQPVf6JLn13IDdf7gR 6tag== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@amd.com header.s=selector1 header.b=w8XNa+uC; 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. 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Wed, 21 Jun 2023 12:34:30 -0500 Received: from SATLEXMB03.amd.com (10.181.40.144) 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 15.1.2507.6; Wed, 21 Jun 2023 10:34:29 -0700 Received: from xsjlizhih40.xilinx.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server id 15.1.2507.23 via Frontend Transport; Wed, 21 Jun 2023 12:34:29 -0500 From: Lizhi Hou To: , , , CC: Lizhi Hou , , , Subject: [PATCH V9 4/5] of: overlay: Extend of_overlay_fdt_apply() to specify the target node Date: Wed, 21 Jun 2023 10:34:08 -0700 Message-ID: <1687368849-36722-5-git-send-email-lizhi.hou@amd.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1687368849-36722-1-git-send-email-lizhi.hou@amd.com> References: <1687368849-36722-1-git-send-email-lizhi.hou@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9CE:EE_|DS0PR12MB8341:EE_ X-MS-Office365-Filtering-Correlation-Id: 1860fda1-c414-4b75-62d2-08db727dc57b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 17:34:31.1639 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1860fda1-c414-4b75-62d2-08db727dc57b 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=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9CE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB8341 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?1769335577228445190?= X-GMAIL-MSGID: =?utf-8?q?1769335577228445190?= Currently, in an overlay fdt fragment, it needs to specify the exact location in base DT. In another word, when the fdt fragment is generated, the base DT location for the fragment is already known. There is new use case that the base DT location is unknown when fdt fragment is generated. For example, the add-on device provide a fdt overlay with its firmware to describe its downstream devices. Because it is add-on device which can be plugged to different systems, its firmware will not be able to know the overlay location in base DT. Instead, the device driver will load the overlay fdt and apply it to base DT at runtime. In this case, of_overlay_fdt_apply() needs to be extended to specify the target node for device driver to apply overlay fdt. int overlay_fdt_apply(..., struct device_node *base); Signed-off-by: Lizhi Hou --- drivers/of/overlay.c | 42 +++++++++++++++++++++++++++++++----------- drivers/of/unittest.c | 3 ++- include/linux/of.h | 2 +- 3 files changed, 34 insertions(+), 13 deletions(-) diff --git a/drivers/of/overlay.c b/drivers/of/overlay.c index 7feb643f1370..6f3ae30c878d 100644 --- a/drivers/of/overlay.c +++ b/drivers/of/overlay.c @@ -682,9 +682,11 @@ static int build_changeset(struct overlay_changeset *ovcs) * 1) "target" property containing the phandle of the target * 2) "target-path" property containing the path of the target */ -static struct device_node *find_target(struct device_node *info_node) +static struct device_node *find_target(struct device_node *info_node, + struct device_node *target_base) { struct device_node *node; + char *target_path; const char *path; u32 val; int ret; @@ -700,10 +702,23 @@ static struct device_node *find_target(struct device_node *info_node) ret = of_property_read_string(info_node, "target-path", &path); if (!ret) { - node = of_find_node_by_path(path); - if (!node) - pr_err("find target, node: %pOF, path '%s' not found\n", - info_node, path); + if (target_base) { + target_path = kasprintf(GFP_KERNEL, "%pOF%s", target_base, path); + if (!target_path) + return NULL; + node = of_find_node_by_path(target_path); + if (!node) { + pr_err("find target, node: %pOF, path '%s' not found\n", + info_node, target_path); + } + kfree(target_path); + } else { + node = of_find_node_by_path(path); + if (!node) { + pr_err("find target, node: %pOF, path '%s' not found\n", + info_node, path); + } + } return node; } @@ -715,6 +730,7 @@ static struct device_node *find_target(struct device_node *info_node) /** * init_overlay_changeset() - initialize overlay changeset from overlay tree * @ovcs: Overlay changeset to build + * @target_base: Point to the target node to apply overlay * * Initialize @ovcs. Populate @ovcs->fragments with node information from * the top level of @overlay_root. The relevant top level nodes are the @@ -725,7 +741,8 @@ static struct device_node *find_target(struct device_node *info_node) * detected in @overlay_root. On error return, the caller of * init_overlay_changeset() must call free_overlay_changeset(). */ -static int init_overlay_changeset(struct overlay_changeset *ovcs) +static int init_overlay_changeset(struct overlay_changeset *ovcs, + struct device_node *target_base) { struct device_node *node, *overlay_node; struct fragment *fragment; @@ -786,7 +803,7 @@ static int init_overlay_changeset(struct overlay_changeset *ovcs) fragment = &fragments[cnt]; fragment->overlay = overlay_node; - fragment->target = find_target(node); + fragment->target = find_target(node, target_base); if (!fragment->target) { of_node_put(fragment->overlay); ret = -EINVAL; @@ -877,6 +894,7 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) * * of_overlay_apply() - Create and apply an overlay changeset * @ovcs: overlay changeset + * @base: point to the target node to apply overlay * * Creates and applies an overlay changeset. * @@ -900,7 +918,8 @@ static void free_overlay_changeset(struct overlay_changeset *ovcs) * the caller of of_overlay_apply() must call free_overlay_changeset(). */ -static int of_overlay_apply(struct overlay_changeset *ovcs) +static int of_overlay_apply(struct overlay_changeset *ovcs, + struct device_node *base) { int ret = 0, ret_revert, ret_tmp; @@ -908,7 +927,7 @@ static int of_overlay_apply(struct overlay_changeset *ovcs) if (ret) goto out; - ret = init_overlay_changeset(ovcs); + ret = init_overlay_changeset(ovcs, base); if (ret) goto out; @@ -952,6 +971,7 @@ static int of_overlay_apply(struct overlay_changeset *ovcs) * @overlay_fdt: pointer to overlay FDT * @overlay_fdt_size: number of bytes in @overlay_fdt * @ret_ovcs_id: pointer for returning created changeset id + * @base: pointer for the target node to apply overlay * * Creates and applies an overlay changeset. * @@ -967,7 +987,7 @@ static int of_overlay_apply(struct overlay_changeset *ovcs) */ int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, - int *ret_ovcs_id) + int *ret_ovcs_id, struct device_node *base) { void *new_fdt; void *new_fdt_align; @@ -1037,7 +1057,7 @@ int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, } ovcs->overlay_mem = overlay_mem; - ret = of_overlay_apply(ovcs); + ret = of_overlay_apply(ovcs, base); /* * If of_overlay_apply() error, calling free_overlay_changeset() may * result in a memory leak if the apply partly succeeded, so do NOT diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 1193a574fa36..4a0774954b93 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -3506,7 +3506,8 @@ static int __init overlay_data_apply(const char *overlay_name, int *ovcs_id) if (!size) pr_err("no overlay data for %s\n", overlay_name); - ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id); + ret = of_overlay_fdt_apply(info->dtbo_begin, size, &info->ovcs_id, + NULL); if (ovcs_id) *ovcs_id = info->ovcs_id; if (ret < 0) diff --git a/include/linux/of.h b/include/linux/of.h index 82d0a476ec75..5fe5257a7ab7 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -1668,7 +1668,7 @@ struct of_overlay_notify_data { #ifdef CONFIG_OF_OVERLAY int of_overlay_fdt_apply(const void *overlay_fdt, u32 overlay_fdt_size, - int *ovcs_id); + int *ovcs_id, struct device_node *target_base); int of_overlay_remove(int *ovcs_id); int of_overlay_remove_all(void); From patchwork Wed Jun 21 17:34:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lizhi Hou X-Patchwork-Id: 111216 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp4537448vqr; Wed, 21 Jun 2023 10:46:38 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ7DLXmKIwvmzMjZM0D4E7tShqDYy6ztQHfkgHvj0J3ujOsEAi/0IlplgtcPojwMmsFTRse0 X-Received: by 2002:a05:6a20:442a:b0:110:6146:1056 with SMTP id ce42-20020a056a20442a00b0011061461056mr23949440pzb.2.1687369598369; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jun 2023 17:34:33.7909 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 84701d7f-b0ab-46ce-6194-08db727dc713 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: CO1NAM11FT103.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6837 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?1769335263813141046?= X-GMAIL-MSGID: =?utf-8?q?1769335263813141046?= pci_dt_testdrv is bound to QEMU PCI Test Device. It reads overlay_pci_node fdt fragment and apply it to Test Device. Then it calls of_platform_default_populate() to populate the platform devices. Signed-off-by: Lizhi Hou Tested-by: Herve Codina --- drivers/of/unittest-data/Makefile | 3 +- .../of/unittest-data/overlay_pci_node.dtso | 22 ++ drivers/of/unittest.c | 188 ++++++++++++++++++ drivers/pci/quirks.c | 1 + 4 files changed, 213 insertions(+), 1 deletion(-) create mode 100644 drivers/of/unittest-data/overlay_pci_node.dtso diff --git a/drivers/of/unittest-data/Makefile b/drivers/of/unittest-data/Makefile index ea5f4da68e23..1aa875088159 100644 --- a/drivers/of/unittest-data/Makefile +++ b/drivers/of/unittest-data/Makefile @@ -32,7 +32,8 @@ obj-$(CONFIG_OF_OVERLAY) += overlay.dtbo.o \ overlay_gpio_02b.dtbo.o \ overlay_gpio_03.dtbo.o \ overlay_gpio_04a.dtbo.o \ - overlay_gpio_04b.dtbo.o + overlay_gpio_04b.dtbo.o \ + overlay_pci_node.dtbo.o # enable creation of __symbols__ node DTC_FLAGS_overlay += -@ diff --git a/drivers/of/unittest-data/overlay_pci_node.dtso b/drivers/of/unittest-data/overlay_pci_node.dtso new file mode 100644 index 000000000000..c05e52e9e44a --- /dev/null +++ b/drivers/of/unittest-data/overlay_pci_node.dtso @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: GPL-2.0 +/dts-v1/; +/ { + fragment@0 { + target-path=""; + __overlay__ { + #address-cells = <3>; + #size-cells = <2>; + pci-ep-bus@0 { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x0 0x0 0x0 0x1000>; + reg = <0 0 0 0 0>; + unittest-pci@100 { + compatible = "unittest-pci"; + reg = <0x100 0x200>; + }; + }; + }; + }; +}; diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c index 4a0774954b93..9e2dae29d77c 100644 --- a/drivers/of/unittest.c +++ b/drivers/of/unittest.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include @@ -3352,6 +3353,7 @@ OVERLAY_INFO_EXTERN(overlay_gpio_02b); OVERLAY_INFO_EXTERN(overlay_gpio_03); OVERLAY_INFO_EXTERN(overlay_gpio_04a); OVERLAY_INFO_EXTERN(overlay_gpio_04b); +OVERLAY_INFO_EXTERN(overlay_pci_node); OVERLAY_INFO_EXTERN(overlay_bad_add_dup_node); OVERLAY_INFO_EXTERN(overlay_bad_add_dup_prop); OVERLAY_INFO_EXTERN(overlay_bad_phandle); @@ -3387,6 +3389,7 @@ static struct overlay_info overlays[] = { OVERLAY_INFO(overlay_gpio_03, 0), OVERLAY_INFO(overlay_gpio_04a, 0), OVERLAY_INFO(overlay_gpio_04b, 0), + OVERLAY_INFO(overlay_pci_node, 0), OVERLAY_INFO(overlay_bad_add_dup_node, -EINVAL), OVERLAY_INFO(overlay_bad_add_dup_prop, -EINVAL), OVERLAY_INFO(overlay_bad_phandle, -EINVAL), @@ -3757,6 +3760,190 @@ static inline __init void of_unittest_overlay_high_level(void) {} #endif +#ifdef CONFIG_PCI_DYNAMIC_OF_NODES + +int of_unittest_pci_dev_num; +int of_unittest_pci_child_num; + +/* + * PCI device tree node test driver + */ +static const struct pci_device_id testdrv_pci_ids[] = { + { PCI_DEVICE(PCI_VENDOR_ID_REDHAT, 0x5), }, /* PCI_VENDOR_ID_REDHAT */ + { 0, } +}; + +static int testdrv_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct overlay_info *info; + struct device_node *dn; + int ret, ovcs_id; + u32 size; + + dn = pdev->dev.of_node; + if (!dn) { + dev_err(&pdev->dev, "does not find bus endpoint"); + return -EINVAL; + } + + for (info = overlays; info && info->name; info++) { + if (!strcmp(info->name, "overlay_pci_node")) + break; + } + if (!info || !info->name) { + dev_err(&pdev->dev, "no overlay data for overlay_pci_node"); + return -ENODEV; + } + + size = info->dtbo_end - info->dtbo_begin; + ret = of_overlay_fdt_apply(info->dtbo_begin, size, &ovcs_id, dn); + of_node_put(dn); + if (ret) + return ret; + + of_platform_default_populate(dn, NULL, &pdev->dev); + pci_set_drvdata(pdev, (void *)(uintptr_t)ovcs_id); + + return 0; +} + +static void testdrv_remove(struct pci_dev *pdev) +{ + int ovcs_id = (int)(uintptr_t)pci_get_drvdata(pdev); + + of_platform_depopulate(&pdev->dev); + of_overlay_remove(&ovcs_id); +} + +static struct pci_driver testdrv_driver = { + .name = "pci_dt_testdrv", + .id_table = testdrv_pci_ids, + .probe = testdrv_probe, + .remove = testdrv_remove, +}; + +static int unittest_pci_probe(struct platform_device *pdev) +{ + struct resource *res; + struct device *dev; + u64 exp_addr; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + dev = &pdev->dev; + while (dev && !dev_is_pci(dev)) + dev = dev->parent; + if (!dev) { + pr_err("unable to find parent device\n"); + return -ENODEV; + } + + exp_addr = pci_resource_start(to_pci_dev(dev), 0) + 0x100; + unittest(res->start == exp_addr, "Incorrect translated address %llx, expected %llx\n", + (u64)res->start, exp_addr); + + of_unittest_pci_child_num++; + + return 0; +} + +static const struct of_device_id unittest_pci_of_match[] = { + { .compatible = "unittest-pci" }, + { } +}; + +static struct platform_driver unittest_pci_driver = { + .probe = unittest_pci_probe, + .driver = { + .name = "unittest-pci", + .of_match_table = unittest_pci_of_match, + }, +}; + +static int of_unittest_pci_node_verify(struct pci_dev *pdev, bool add) +{ + struct device_node *pnp, *np = NULL; + struct device *child_dev; + char *path = NULL; + const __be32 *reg; + int rc = 0; + + pnp = pdev->dev.of_node; + unittest(pnp, "Failed creating PCI dt node\n"); + if (!pnp) + return -ENODEV; + + if (add) { + path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0/unittest-pci@100", pnp); + np = of_find_node_by_path(path); + unittest(np, "Failed to get unittest-pci node under PCI node\n"); + if (!np) { + rc = -ENODEV; + goto failed; + } + + reg = of_get_property(np, "reg", NULL); + unittest(reg, "Failed to get reg property\n"); + if (!reg) + rc = -ENODEV; + } else { + path = kasprintf(GFP_KERNEL, "%pOF/pci-ep-bus@0", pnp); + np = of_find_node_by_path(path); + unittest(!np, "Child device tree node is not removed\n"); + child_dev = device_find_any_child(&pdev->dev); + unittest(!child_dev, "Child device is not removed\n"); + } + +failed: + kfree(path); + if (np) + of_node_put(np); + + return rc; +} + +static void __init of_unittest_pci_node(void) +{ + struct pci_dev *pdev = NULL; + int rc; + + rc = pci_register_driver(&testdrv_driver); + unittest(!rc, "Failed to register pci test driver; rc = %d\n", rc); + if (rc) + return; + + rc = platform_driver_register(&unittest_pci_driver); + if (unittest(!rc, "Failed to register unittest pci driver\n")) { + pci_unregister_driver(&testdrv_driver); + return; + } + + while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) { + of_unittest_pci_node_verify(pdev, true); + of_unittest_pci_dev_num++; + } + if (pdev) + pci_dev_put(pdev); + + unittest(of_unittest_pci_dev_num, "No test PCI device been found\n"); + unittest(of_unittest_pci_dev_num == of_unittest_pci_child_num, + "Child device number %d is not expected %d", of_unittest_pci_child_num, + of_unittest_pci_dev_num); + + platform_driver_unregister(&unittest_pci_driver); + pci_unregister_driver(&testdrv_driver); + + while ((pdev = pci_get_device(PCI_VENDOR_ID_REDHAT, 0x5, pdev)) != NULL) + of_unittest_pci_node_verify(pdev, false); + if (pdev) + pci_dev_put(pdev); +} +#else +static void __init of_unittest_pci_node(void) { } +#endif + static int __init of_unittest(void) { struct device_node *np; @@ -3807,6 +3994,7 @@ static int __init of_unittest(void) of_unittest_platform_populate(); of_unittest_overlay(); of_unittest_lifecycle(); + of_unittest_pci_node(); /* Double check linkage after removing testcase data */ of_unittest_check_tree_linkage(); diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index c8f3acea752d..51945b631628 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -6052,3 +6052,4 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a31, dpc_log_size); */ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5020, of_pci_make_dev_node); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_XILINX, 0x5021, of_pci_make_dev_node); +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_REDHAT, 0x0005, of_pci_make_dev_node);