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Thu, 15 Jun 2023 11:51:17 -0500 From: Lizhi Hou To: , , , CC: Lizhi Hou , , , Subject: [PATCH V9 6/6] of: unittest: Add pci_dt_testdrv pci driver Date: Thu, 15 Jun 2023 09:50:42 -0700 Message-ID: <1686847842-33780-7-git-send-email-lizhi.hou@amd.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1686847842-33780-1-git-send-email-lizhi.hou@amd.com> References: <1686847842-33780-1-git-send-email-lizhi.hou@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000971E9:EE_|SN7PR12MB8129:EE_ X-MS-Office365-Filtering-Correlation-Id: caaa430e-f37b-4d88-927f-08db6dc0be09 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)(39860400002)(346002)(376002)(396003)(136003)(451199021)(40470700004)(46966006)(36840700001)(44832011)(40480700001)(70586007)(70206006)(36756003)(4326008)(316002)(2906002)(5660300002)(40460700003)(8936002)(8676002)(41300700001)(110136005)(47076005)(54906003)(86362001)(82310400005)(478600001)(6666004)(26005)(36860700001)(186003)(82740400003)(81166007)(356005)(336012)(83380400001)(426003)(2616005)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jun 2023 16:51:19.0941 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: caaa430e-f37b-4d88-927f-08db6dc0be09 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: MWH0EPF000971E9.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB8129 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/of/unittest-data/Makefile | 3 +- .../of/unittest-data/overlay_pci_node.dtso | 22 ++ drivers/of/unittest.c | 188 ++++++++++++++++++ 3 files changed, 212 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..e21f0bdc1b85 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", + 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(); -- 2.34.1