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Wysocki" , Viresh Kumar , Shuah Khan , "Borislav Petkov" , Ingo Molnar , CC: Deepak Sharma , Alex Deucher , Mario Limonciello , Nathan Fontenot , Jinzhou Su , Xiaojian Du , , , Huang Rui Subject: [PATCH 03/19] ACPI: CPPC: add cppc enable register function Date: Wed, 8 Sep 2021 22:59:45 +0800 Message-ID: <20210908150001.3702552-4-ray.huang@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210908150001.3702552-1-ray.huang@amd.com> References: <20210908150001.3702552-1-ray.huang@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] 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-Office365-Filtering-Correlation-Id: e77b2fe8-9366-46be-a82f-08d972d97d15 X-MS-TrafficTypeDiagnostic: DM6PR12MB4203: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; 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:(4636009)(36840700001)(46966006)(2906002)(36756003)(356005)(7696005)(1076003)(54906003)(70586007)(110136005)(81166007)(6666004)(86362001)(36860700001)(8676002)(26005)(4326008)(47076005)(5660300002)(2616005)(316002)(16526019)(186003)(336012)(426003)(8936002)(83380400001)(70206006)(82310400003)(508600001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Sep 2021 15:01:08.0037 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e77b2fe8-9366-46be-a82f-08d972d97d15 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: CO1NAM11FT036.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4203 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Jinzhou Su Export the cppc enable register function for future use. Signed-off-by: Jinzhou Su Signed-off-by: Huang Rui --- drivers/acpi/cppc_acpi.c | 42 ++++++++++++++++++++++++++++++++++++++++ include/acpi/cppc_acpi.h | 5 +++++ 2 files changed, 47 insertions(+) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index a4d4eebba1da..de4b30545215 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -1220,6 +1220,48 @@ int cppc_get_perf_ctrs(int cpunum, struct cppc_perf_fb_ctrs *perf_fb_ctrs) } EXPORT_SYMBOL_GPL(cppc_get_perf_ctrs); +/** + * cppc_set_enable - Set to enable CPPC register. + * @cpu: CPU for which to enable CPPC register. + * @enable: enable field to write into share memory. + * + * Return: 0 for success, -ERRNO otherwise. + */ +int cppc_set_enable(int cpu, u32 enable) +{ + int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu); + struct cpc_register_resource *enable_reg; + struct cpc_desc *cpc_desc = per_cpu(cpc_desc_ptr, cpu); + struct cppc_pcc_data *pcc_ss_data = NULL; + int ret = -1; + + if (!cpc_desc) { + pr_debug("No CPC descriptor for CPU:%d\n", cpu); + return -ENODEV; + } + + enable_reg = &cpc_desc->cpc_regs[ENABLE]; + + if (CPC_IN_PCC(enable_reg)) { + + if (pcc_ss_id < 0) + return -EIO; + + ret = cpc_write(cpu, enable_reg, enable); + if (ret) + return ret; + + pcc_ss_data = pcc_data[pcc_ss_id]; + + down_write(&pcc_ss_data->pcc_lock); + send_pcc_cmd(pcc_ss_id, CMD_WRITE); + up_write(&pcc_ss_data->pcc_lock); + } + + return ret; +} +EXPORT_SYMBOL_GPL(cppc_set_enable); + /** * cppc_set_perf - Set a CPU's performance controls. * @cpu: CPU for which to set performance controls. diff --git a/include/acpi/cppc_acpi.h b/include/acpi/cppc_acpi.h index 9f4985b4d64d..3fdae40a75fc 100644 --- a/include/acpi/cppc_acpi.h +++ b/include/acpi/cppc_acpi.h @@ -137,6 +137,7 @@ struct cppc_cpudata { extern int cppc_get_desired_perf(int cpunum, u64 *desired_perf); extern int cppc_get_perf_ctrs(int cpu, struct cppc_perf_fb_ctrs *perf_fb_ctrs); extern int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls); +extern int cppc_set_enable(int cpu, u32 enable); extern int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps); extern bool acpi_cpc_valid(void); extern int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data); @@ -157,6 +158,10 @@ static inline int cppc_set_perf(int cpu, struct cppc_perf_ctrls *perf_ctrls) { return -ENOTSUPP; } +static inline int cppc_set_enable(int cpu, u32 enable) +{ + return -ENOTSUPP; +} static inline int cppc_get_perf_caps(int cpu, struct cppc_perf_caps *caps) { return -ENOTSUPP; -- 2.25.1