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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=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SN1PEPF00026367.mail.protection.outlook.com (10.167.241.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8137.17 via Frontend Transport; Sat, 9 Nov 2024 04:42:34 +0000 Received: from AUS-P9-MLIMONCI.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Fri, 8 Nov 2024 22:42:32 -0600 From: Mario Limonciello To: Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= CC: "Rafael J . Wysocki" , Len Brown , Maximilian Luz , Lee Chun-Yi , "Shyam Sundar S K" , Corentin Chary , "Luke D . Jones" , Ike Panhc , Henrique de Moraes Holschuh , "Alexis Belmonte" , =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= , Ai Chao , Gergo Koteles , open list , "open list:ACPI" , "open list:MICROSOFT SURFACE PLATFORM PROFILE DRIVER" , "open list:THINKPAD ACPI EXTRAS DRIVER" , Mark Pearson , Matthew Schwartz , Mario Limonciello Subject: [PATCH v6 10/22] ACPI: platform_profile: Create class for ACPI platform profile Date: Fri, 8 Nov 2024 22:41:39 -0600 Message-ID: <20241109044151.29804-11-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241109044151.29804-1-mario.limonciello@amd.com> References: <20241109044151.29804-1-mario.limonciello@amd.com> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF00026367:EE_|DM4PR12MB6496:EE_ X-MS-Office365-Filtering-Correlation-Id: fdb49b3e-a894-4f93-4433-08dd0078edba X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|82310400026|7416014|36860700013|376014; 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:(13230040)(1800799024)(82310400026)(7416014)(36860700013)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 Nov 2024 04:42:34.0180 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fdb49b3e-a894-4f93-4433-08dd0078edba 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: SN1PEPF00026367.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6496 When registering a platform profile handler create a class device that will allow changing a single platform profile handler. The class and sysfs group are no longer needed when the platform profile core is a module and unloaded, so remove them at that time as well. Tested-by: Mark Pearson Signed-off-by: Mario Limonciello Reviewed-by: Armin Wolf --- v6: * Catch failures in ida_alloc * Use 4th argument of device_create instead of dev_set_drvdata() * Squash unregister patch * Add module init callback * Move class creation to module init * Update visibility based on group presence * Add back parent device v5: * Use ida instead of idr * Use device_unregister instead of device_destroy() * MKDEV (0, 0) --- drivers/acpi/platform_profile.c | 88 ++++++++++++++++++++++++++++++-- include/linux/platform_profile.h | 2 + 2 files changed, 85 insertions(+), 5 deletions(-) diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index 32affb75e782d..ef6af2c655524 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -5,6 +5,7 @@ #include #include #include +#include #include #include #include @@ -22,6 +23,12 @@ static const char * const profile_names[] = { }; static_assert(ARRAY_SIZE(profile_names) == PLATFORM_PROFILE_LAST); +static DEFINE_IDA(platform_profile_ida); + +static const struct class platform_profile_class = { + .name = "platform-profile", +}; + static ssize_t platform_profile_choices_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -105,8 +112,25 @@ static struct attribute *platform_profile_attrs[] = { NULL }; +static int profile_class_registered(struct device *dev, const void *data) +{ + return 1; +} + +static umode_t profile_class_is_visible(struct kobject *kobj, struct attribute *attr, int idx) +{ + if (!class_find_device(&platform_profile_class, NULL, NULL, profile_class_registered)) + return 0; + if (attr == &dev_attr_platform_profile_choices.attr) + return 0444; + if (attr == &dev_attr_platform_profile.attr) + return 0644; + return 0; +} + static const struct attribute_group platform_profile_group = { - .attrs = platform_profile_attrs + .attrs = platform_profile_attrs, + .is_visible = profile_class_is_visible, }; void platform_profile_notify(struct platform_profile_handler *pprof) @@ -123,6 +147,9 @@ int platform_profile_cycle(void) enum platform_profile_option next; int err; + if (!class_is_registered(&platform_profile_class)) + return -ENODEV; + scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) { if (!cur_profile) return -ENODEV; @@ -164,25 +191,76 @@ int platform_profile_register(struct platform_profile_handler *pprof) if (cur_profile) return -EEXIST; - err = sysfs_create_group(acpi_kobj, &platform_profile_group); - if (err) - return err; + /* create class interface for individual handler */ + pprof->minor = ida_alloc(&platform_profile_ida, GFP_KERNEL); + if (pprof->minor < 0) + return pprof->minor; + pprof->class_dev = device_create(&platform_profile_class, pprof->dev, + MKDEV(0, 0), pprof, "platform-profile-%d", + pprof->minor); + if (IS_ERR(pprof->class_dev)) { + err = PTR_ERR(pprof->class_dev); + goto cleanup_ida; + } cur_profile = pprof; + + err = sysfs_update_group(acpi_kobj, &platform_profile_group); + if (err) + goto cleanup_cur; + return 0; + +cleanup_cur: + cur_profile = NULL; + device_unregister(pprof->class_dev); + +cleanup_ida: + ida_free(&platform_profile_ida, pprof->minor); + + return err; } EXPORT_SYMBOL_GPL(platform_profile_register); int platform_profile_remove(struct platform_profile_handler *pprof) { + int id; guard(mutex)(&profile_lock); - sysfs_remove_group(acpi_kobj, &platform_profile_group); + id = pprof->minor; + device_unregister(pprof->class_dev); + ida_free(&platform_profile_ida, id); + cur_profile = NULL; + + sysfs_update_group(acpi_kobj, &platform_profile_group); + return 0; } EXPORT_SYMBOL_GPL(platform_profile_remove); +static int __init platform_profile_init(void) +{ + int err; + + err = class_register(&platform_profile_class); + if (err) + return err; + + err = sysfs_create_group(acpi_kobj, &platform_profile_group); + if (err) + class_unregister(&platform_profile_class); + + return err; +} +static void __exit platform_profile_exit(void) +{ + class_unregister(&platform_profile_class); + sysfs_remove_group(acpi_kobj, &platform_profile_group); +} +module_init(platform_profile_init); +module_exit(platform_profile_exit); + MODULE_AUTHOR("Mark Pearson "); MODULE_DESCRIPTION("ACPI platform profile sysfs interface"); MODULE_LICENSE("GPL"); diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h index 8ec0b8da56db5..a888fd085c513 100644 --- a/include/linux/platform_profile.h +++ b/include/linux/platform_profile.h @@ -29,6 +29,8 @@ enum platform_profile_option { struct platform_profile_handler { const char *name; struct device *dev; + struct device *class_dev; + int minor; unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)]; int (*profile_get)(struct platform_profile_handler *pprof, enum platform_profile_option *profile);