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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CH1PEPF0000AD74.mail.protection.outlook.com (10.167.244.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8230.7 via Frontend Transport; Mon, 2 Dec 2024 05:51:59 +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; Sun, 1 Dec 2024 23:51:56 -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 , Armin Wolf Subject: [PATCH v9 17/22] ACPI: platform_profile: Make sure all profile handlers agree on profile Date: Sun, 1 Dec 2024 23:50:26 -0600 Message-ID: <20241202055031.8038-18-mario.limonciello@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241202055031.8038-1-mario.limonciello@amd.com> References: <20241202055031.8038-1-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: CH1PEPF0000AD74:EE_|IA0PR12MB8085:EE_ X-MS-Office365-Filtering-Correlation-Id: 8a079ef1-bcda-4592-462f-08dd12956ff5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|36860700013|1800799024|82310400026|7416014|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)(36860700013)(1800799024)(82310400026)(7416014)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Dec 2024 05:51:59.3313 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8a079ef1-bcda-4592-462f-08dd12956ff5 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: CH1PEPF0000AD74.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8085 If for any reason multiple profile handlers don't agree on the profile return the custom profile. Reviewed-by: Armin Wolf Tested-by: Mark Pearson Reviewed-by: Mark Pearson Signed-off-by: Mario Limonciello Reviewed-by: Ilpo Järvinen --- drivers/acpi/platform_profile.c | 119 ++++++++++++++++++++++++++------ 1 file changed, 96 insertions(+), 23 deletions(-) diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index a9cd13c5fd39b..d5f0679d59d50 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -66,6 +66,22 @@ static int _store_class_profile(struct device *dev, void *data) return handler->profile_set(handler, *bit); } +/** + * _notify_class_profile - Notify the class device of a profile change + * @dev: The class device + * @data: Unused + */ +static int _notify_class_profile(struct device *dev, void *data) +{ + struct platform_profile_handler *handler = dev_get_drvdata(dev); + + lockdep_assert_held(&profile_lock); + sysfs_notify(&handler->class_dev->kobj, NULL, "profile"); + kobject_uevent(&handler->class_dev->kobj, KOBJ_CHANGE); + + return 0; +} + /** * get_class_profile - Show the current profile for a class device * @dev: The class device @@ -246,51 +262,108 @@ static ssize_t platform_profile_choices_show(struct device *dev, return _commmon_choices_show(aggregate, buf); } +/** + * _aggregate_profiles - Aggregate the profiles for legacy sysfs interface + * @dev: The device + * @data: The profile to return + * Return: 0 on success, -errno on failure + */ +static int _aggregate_profiles(struct device *dev, void *data) +{ + enum platform_profile_option *profile = data; + enum platform_profile_option val; + int err; + + err = get_class_profile(dev, &val); + if (err) + return err; + + if (*profile != PLATFORM_PROFILE_LAST && *profile != val) + *profile = PLATFORM_PROFILE_CUSTOM; + else + *profile = val; + + return 0; +} + +/** + * _store_and_notify - Atomically store and notify a class from legacy sysfs interface + * @dev: The device + * @data: The profile to return + * Return: 0 on success, -errno on failure + */ +static int _store_and_notify(struct device *dev, void *data) +{ + enum platform_profile_option *profile = data; + int err; + + err = _store_class_profile(dev, profile); + if (err) + return err; + return _notify_class_profile(dev, NULL); +} + +/** + * platform_profile_show - Show the current profile for legacy sysfs interface + * @dev: The device + * @attr: The attribute + * @buf: The buffer to write to + * Return: The number of bytes written + */ static ssize_t platform_profile_show(struct device *dev, - struct device_attribute *attr, - char *buf) + struct device_attribute *attr, + char *buf) { - enum platform_profile_option profile = PLATFORM_PROFILE_BALANCED; + enum platform_profile_option profile = PLATFORM_PROFILE_LAST; int err; scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) { - if (!cur_profile) - return -ENODEV; - - err = cur_profile->profile_get(cur_profile, &profile); + err = class_for_each_device(&platform_profile_class, NULL, + &profile, _aggregate_profiles); if (err) return err; } - /* Check that profile is valid index */ - if (WARN_ON((profile < 0) || (profile >= ARRAY_SIZE(profile_names)))) - return -EIO; + /* no profile handler registered any more */ + if (profile == PLATFORM_PROFILE_LAST) + return -EINVAL; return sysfs_emit(buf, "%s\n", profile_names[profile]); } +/** + * platform_profile_store - Set the profile for legacy sysfs interface + * @dev: The device + * @attr: The attribute + * @buf: The buffer to read from + * @count: The number of bytes to read + * Return: The number of bytes read + */ static ssize_t platform_profile_store(struct device *dev, - struct device_attribute *attr, - const char *buf, size_t count) + struct device_attribute *attr, + const char *buf, size_t count) { - int err, i; + unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)]; + int ret; + int i; /* Scan for a matching profile */ i = sysfs_match_string(profile_names, buf); - if (i < 0) + if (i < 0 || i == PLATFORM_PROFILE_CUSTOM) return -EINVAL; - + set_bit(PLATFORM_PROFILE_LAST, choices); scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) { - if (!cur_profile) - return -ENODEV; - - /* Check that platform supports this profile choice */ - if (!test_bit(i, cur_profile->choices)) + ret = class_for_each_device(&platform_profile_class, NULL, + choices, _aggregate_choices); + if (ret) + return ret; + if (!test_bit(i, choices)) return -EOPNOTSUPP; - err = cur_profile->profile_set(cur_profile, i); - if (err) - return err; + ret = class_for_each_device(&platform_profile_class, NULL, &i, + _store_and_notify); + if (ret) + return ret; } sysfs_notify(acpi_kobj, NULL, "platform_profile");