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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 13/22] ACPI: platform_profile: Add profile attribute for class interface Date: Sun, 1 Dec 2024 23:50:22 -0600 Message-ID: <20241202055031.8038-14-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: CH1PEPF0000AD75:EE_|DS0PR12MB7928:EE_ X-MS-Office365-Filtering-Correlation-Id: 6a2911ac-45de-4a4c-688c-08dd12956b16 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|7416014|376014|82310400026|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: 7pYMB3JNJjYzVOnTYz9AeXLFT/fKwZBF4AXFT7G9Dl6cZ4xtPPiZTuldF6g4RU6C/dp84dC7vCpBRvdJgIjv1lloIwy1qnSnUN5Srx5y0vp8eTWP9wmGlWZ81Mith0TDQf/m+4QlsEmfhCYQL8Gf9iLQW6OkZbhU8jS9c9XNveGs0NWvQKypRi9IHgJlQ6quR/kwxqujzhHIhfDcuhNTyDS+r2Stpw42l4gXb4Da2Bq3c9iRPznPLCDdZlVKLdP01TnekFdDrMJ/CJR+LgpFquk+lBiNzDvkArwcAih2mIs77e1Gke08ZyAjW5TOFacL/bFeypnZdIdEdpHCNVW+ySfAOFH32aaoqeTkg/yyFOuZ3+EfAy2YAzjRG8kJkMM9jz6MyQWiKTXctPiRPo/h/tPCI27ya6JL1tqU7MzMzGOgEX6+FIrZwSXjb+D1YRYnlamjPNDGBp+SvevcARlFteevEY7S3wIrTirM9p+5LzjQvInZBPNpseoVmm5Dk9NHBWr2kPbTTptF+Z8sQn+qN9hcsQERKaBHjJVQ099EUcvpgLr+1Vwrnxw4XhTOaKxxneuyAWhuHR4HMWJ16KPSQJ2twuMTYKP0JW4llFcxFl7xjLvOwSEadAxkoMaZJ1NoexLrHLBl6bHoPgV5aQGcW4z64K+oKFzqmGjl+f/xze9tWqIQrF0O+bNbW6M2+kBBs2DADhV7ql7bBF8hrFob1eZaDCy6LD8gzVUeaqXq25CkFFY1QmJYcRnpKyDPF1d19hQr8fg7QYKX67pEyyFyOZLIFZZWEeH0ba90CEchy8YO0YfmCN2WcrwR9/WM8oSygS4+UniccFsG6QafUyD/ThdmVmHOxwKvTeCAxbYUXPhunJLR4aslmiA2Cz16thTirZwJ51w0P3PcVCcCDKQu6qnYfRH6+c+d7hjAUtq2pH3MrJZsq4ZkF8eQZ9gf7v97XSBLEWhBUof8eMxlIX3puWSRXzubggi/9bPyyADH+xBZWM3qUXpGHMNbIvyIxvuSGZIUC7+/+TB9L686870Gs60QlrfDV2W2Nu7GArusYJ+ay6av9alzWsC5nHKlfUe5i7KRKV7/F50PvYZTdcLbspBgVrK0G9EtZKJ3ADfc3GE8hj1qRH+lLbScSEiFbX6a9PxYxSnJYldBkGtLIHe3IQdKZcTb4C27PBwdSSDdImQLHoBLc80o8LEr8XzfNM6fIxjq87n2BoiqJyEZdiq8BsSzl/tbdjO8oWtFdaNwl+7B8VFOVWEq4EmRs9TIaZnlkUi3Dj4lHL6Plg4dCdoCYPfWmiX6BVFugawcImryz9aNnWa4WoWoTUigdU7XVLQjeNScQ2apkBK2ng6d3d4Hs7eL0DLc8w9bq71srIpaZ0cdJPEbGMv/dQ3e8vftxHzgyvJ2OXiWk0YR85lYUsWK1T8QZeNqdbtT7uHUBkTJAEI8lgUu1rTgbBJJ8bE1uL0A 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)(7416014)(376014)(82310400026)(1800799024)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Dec 2024 05:51:51.1754 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6a2911ac-45de-4a4c-688c-08dd12956b16 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: CH1PEPF0000AD75.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS0PR12MB7928 Reading and writing the `profile` sysfs file will use the callbacks for the platform profile handler to read or set the given profile. Tested-by: Mark Pearson Reviewed-by: Mark Pearson Reviewed-by: Armin Wolf Signed-off-by: Mario Limonciello Reviewed-by: Ilpo Järvinen --- v8: * whitespace * rename variables --- drivers/acpi/platform_profile.c | 102 ++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c index 885f41bca6c25..fdff374aab128 100644 --- a/drivers/acpi/platform_profile.c +++ b/drivers/acpi/platform_profile.c @@ -47,6 +47,52 @@ static ssize_t _commmon_choices_show(unsigned long *choices, char *buf) return len; } +/** + * _store_class_profile - Set the profile for a class device + * @dev: The class device + * @data: The profile to set + */ +static int _store_class_profile(struct device *dev, void *data) +{ + struct platform_profile_handler *handler; + int *bit = (int *)data; + + lockdep_assert_held(&profile_lock); + handler = dev_get_drvdata(dev); + if (!test_bit(*bit, handler->choices)) + return -EOPNOTSUPP; + + return handler->profile_set(handler, *bit); +} + +/** + * get_class_profile - Show the current profile for a class device + * @dev: The class device + * @profile: The profile to return + * Return: 0 on success, -errno on failure + */ +static int get_class_profile(struct device *dev, + enum platform_profile_option *profile) +{ + struct platform_profile_handler *handler; + enum platform_profile_option val; + int err; + + lockdep_assert_held(&profile_lock); + handler = dev_get_drvdata(dev); + err = handler->profile_get(handler, &val); + if (err) { + pr_err("Failed to get profile for handler %s\n", handler->name); + return err; + } + + if (WARN_ON(val >= PLATFORM_PROFILE_LAST)) + return -EINVAL; + *profile = val; + + return 0; +} + /** * name_show - Show the name of the profile handler * @dev: The device @@ -81,9 +127,65 @@ static ssize_t choices_show(struct device *dev, } static DEVICE_ATTR_RO(choices); +/** + * profile_show - Show the current profile for a class device + * @dev: The device + * @attr: The attribute + * @buf: The buffer to write to + * + * Return: The number of bytes written + */ +static ssize_t profile_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + enum platform_profile_option profile = PLATFORM_PROFILE_LAST; + int err; + + scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) { + err = get_class_profile(dev, &profile); + if (err) + return err; + } + + return sysfs_emit(buf, "%s\n", profile_names[profile]); +} + +/** + * profile_store - Set the profile for a class device + * @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 profile_store(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int index, ret; + + index = sysfs_match_string(profile_names, buf); + if (index < 0) + return -EINVAL; + + scoped_cond_guard(mutex_intr, return -ERESTARTSYS, &profile_lock) { + ret = _store_class_profile(dev, &index); + if (ret) + return ret; + } + + sysfs_notify(acpi_kobj, NULL, "platform_profile"); + + return count; +} +static DEVICE_ATTR_RW(profile); + static struct attribute *profile_attrs[] = { &dev_attr_name.attr, &dev_attr_choices.attr, + &dev_attr_profile.attr, NULL }; ATTRIBUTE_GROUPS(profile);