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Mon, 7 Nov 2022 11:58:58 -0600 From: Perry Yuan To: , , CC: , , , , , , , , , Perry Yuan Subject: [PATCH v3 8/8] cpufreq: amd_pstate: add driver working mode status sysfs entry Date: Tue, 8 Nov 2022 01:57:05 +0800 Message-ID: <20221107175705.2207842-9-Perry.Yuan@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221107175705.2207842-1-Perry.Yuan@amd.com> References: <20221107175705.2207842-1-Perry.Yuan@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6NAM11FT037:EE_|SN7PR12MB7228:EE_ X-MS-Office365-Filtering-Correlation-Id: b37856f2-a699-4666-6ba5-08dac0e9c0db 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:(13230022)(4636009)(136003)(376002)(346002)(396003)(39860400002)(451199015)(40470700004)(36840700001)(46966006)(47076005)(426003)(7696005)(356005)(6666004)(110136005)(1076003)(2616005)(186003)(26005)(16526019)(336012)(36860700001)(83380400001)(5660300002)(2906002)(40480700001)(40460700003)(82310400005)(54906003)(478600001)(316002)(41300700001)(8936002)(8676002)(4326008)(70586007)(70206006)(36756003)(81166007)(82740400003)(86362001)(36900700001)(2101003);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Nov 2022 17:59:02.1083 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b37856f2-a699-4666-6ba5-08dac0e9c0db 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: DM6NAM11FT037.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7228 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS autolearn=ham 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?1748861610042786353?= X-GMAIL-MSGID: =?utf-8?q?1748861610042786353?= While amd-pstate driver was loaded with specific driver mode, it will need to check which mode is enabled for the pstate driver,add this sysfs entry to show the current status $ cat /sys/devices/system/cpu/amd-pstate/status active Signed-off-by: Perry Yuan --- drivers/cpufreq/amd-pstate.c | 44 ++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 6958c5fd9e1c..eadcc9d61d39 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -65,6 +65,8 @@ static int disable_pstate_load __initdata; static int epp_off __initdata; static struct cpufreq_driver *default_pstate_driver; +static struct cpufreq_driver amd_pstate_epp_driver; +static struct cpufreq_driver amd_pstate_driver; static struct amd_cpudata **all_cpu_data; static struct amd_pstate_params global_params; @@ -819,6 +821,46 @@ static ssize_t store_pstate_dynamic_boost(struct kobject *a, return count; } +static ssize_t amd_pstate_show_status(char *buf) +{ + if (!default_pstate_driver) + return sprintf(buf, "off\n"); + + return sprintf(buf, "%s\n", default_pstate_driver == &amd_pstate_epp_driver ? + "active" : "passive"); +} + +static int amd_pstate_update_status(const char *buf, size_t size) +{ + /* FIXME: add driver dynamic switching code */ + return 0; +} + +static ssize_t show_status(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + ssize_t ret; + + mutex_lock(&amd_pstate_driver_lock); + ret = amd_pstate_show_status(buf); + mutex_unlock(&amd_pstate_driver_lock); + + return ret; +} + +static ssize_t store_status(struct kobject *a, struct kobj_attribute *b, + const char *buf, size_t count) +{ + char *p = memchr(buf, '\n', count); + int ret; + + mutex_lock(&amd_pstate_driver_lock); + ret = amd_pstate_update_status(buf, p ? p - buf : count); + mutex_unlock(&amd_pstate_driver_lock); + + return ret < 0 ? ret : count; +} + cpufreq_freq_attr_ro(amd_pstate_max_freq); cpufreq_freq_attr_ro(amd_pstate_lowest_nonlinear_freq); @@ -826,6 +868,7 @@ cpufreq_freq_attr_ro(amd_pstate_highest_perf); cpufreq_freq_attr_rw(energy_performance_preference); cpufreq_freq_attr_ro(energy_performance_available_preferences); define_one_global_rw(pstate_dynamic_boost); +define_one_global_rw(status); static struct freq_attr *amd_pstate_attr[] = { &amd_pstate_max_freq, @@ -845,6 +888,7 @@ static struct freq_attr *amd_pstate_epp_attr[] = { static struct attribute *pstate_global_attributes[] = { &pstate_dynamic_boost.attr, + &status.attr, NULL };