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Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH V2 1/2] platform/x86/amd/pmf: Introduce new interface to export NPU metrics Content-Language: en-US To: =?UTF-8?Q?Ilpo_J=c3=a4rvinen?= CC: Hans de Goede , , , , "Shyam Sundar S K" , LKML , , , , , , , Patil Rajesh Reddy References: <20251212181803.1825142-1-lizhi.hou@amd.com> <20251212181803.1825142-2-lizhi.hou@amd.com> <975fcbfc-33d2-758c-9efb-cbacef47883b@linux.intel.com> From: Lizhi Hou In-Reply-To: <975fcbfc-33d2-758c-9efb-cbacef47883b@linux.intel.com> Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF00001508:EE_|MW6PR12MB8960:EE_ X-MS-Office365-Filtering-Correlation-Id: 78467549-a857-4ac2-fcb7-08de4c7788c0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|1800799024|36860700013; X-Microsoft-Antispam-Message-Info: =?utf-8?B?MVk3ZmpjVVJpMENTaVlRZVoxSjBnRmx3TW9tV0xTdFREQ2RtSlltNjN1M2tk?= =?utf-8?B?cUFGaW44MTdNWkV6QkJjK280UysxbE44cFFrenV1VmRoMlFYVjV5QnVOQWJV?= =?utf-8?B?VnhrMUQxZkNGRndhRVA3TFlRT2RxSzJyNEorclBUb3NodWQzRG1UT0F3U2FL?= =?utf-8?B?YW9CUDE1OTluTGlRa0N5VzlTOGovRisrUXFsbnFXLzl1QUhHR1RYNTlaYTBw?= =?utf-8?B?YXBWUXhMTnFlVGhMaE5sbzFFa2drWWpEdFNSVXFaMmFpSGcvUVp4bWRDMFdC?= =?utf-8?B?MTRJU3JSc3lCTFdyeEZsL0ZZM3dIbStPazFhSW9uY2FjY0QvUjNWVGNjeC9D?= =?utf-8?B?RkJsVnJpcXJ1K2dBRTZ4bTNjcUZXZ3ZVeGRicURhZGhKNCs5aElKUTUxU09H?= =?utf-8?B?eTlFVjVxQzFzbDdZWWxaR20vcWFHdExNVzVmd1ZmUXNLWVhMZytkUzhvRXFB?= =?utf-8?B?L01ZNUY1NzlGNHM0Tk91N0pGMmRyUTZMbXFlNXBYNDhha0ZaRW9tNU96OWJJ?= =?utf-8?B?cFNiM1d6MncvV21JM3hDdnRuelZ1ZVFPQzNuNFE5aTdhaHFRd05XZXd3VVRW?= =?utf-8?B?QjFKWi9GT3pRdENzNmxTbkxwREMvSnRJWjZYWk16NUJlWkU0ZlFWeXVYRzYy?= =?utf-8?B?dlVkMkh4MzNIU0lQRUkya2U4MUZYdzU0NGVRQ1EwYjgzcStFNmNjdjJpR1Zi?= =?utf-8?B?WGxJSytDU0pvMlRUTkRVZ04weTgxR3AwUkpHRnpSWlFncUFTVklZWDRxaTVo?= =?utf-8?B?WkxuSUllT21QK3VZb1N5M05weEhDazY2MTRlV3I3Z0lPTkdyeEtROGI1QThv?= =?utf-8?B?ZnNibTBYZ1FNeGgxNG1oenVZb1I0SlYyZUhpSkhGeWlWR3JiVkVQdG9hMU1F?= =?utf-8?B?bUFnNjFZamNLZk9HVjdZa3c1RjVCcE9tbElaaENSRC9pN1pIMUltRlZnVUJV?= =?utf-8?B?bmlPUVpncFlJN3NqekVydEE0RnI5MUkvTU5hdGs3bDJQUkxTQUR2VjQ3blVC?= =?utf-8?B?STFCUGZGaGxSNzRSc29zUllNc0ozYzYxZ3pnY0p0ZmczMXdEbDFXbk5SVXVW?= =?utf-8?B?R0hYTjJKYlkrTWNkcXhQYlI4M3puMFNwbEVPNElGTk1ldFZlSlgycjZKWVJF?= =?utf-8?B?M2QzcElGL3dROGoxN1o2YURvbUtuSTlSTzF2bm5Dbm5XSVNmOUxUd0JnZ3VY?= =?utf-8?B?RmIzemFXTlp0UFdJcjJmV2IvS2owVGhOTEFDZUI1ajBhdmVhTlBtaENXVWd3?= =?utf-8?B?QUQ3TVJtWXF1T2R6RENPYXhmZXJGU1ZxeTJZYXNvaW9MMXRleXlKRTQyVDNZ?= =?utf-8?B?d3JHTUtkSnJRb3hzaDJTZ1R2Q2dOL3BFNmEzWUgxVG0vNFNQYlcxbjZIZ1Nx?= =?utf-8?B?clk4TjhIVjFQUjlDZFZvelNJalIrL1lhWUR6MEtZOUxiWU1kL2xJTzJidUFM?= =?utf-8?B?aVpXMll0UU4zeTVwZ3JxS1NLWDNFV3ZJWkRzNzFMU2xWYk9vSERWTFFsNE1x?= =?utf-8?B?RTd4Skt4aEpFNWZkRHEvOEozODBSK2lSVFNNNnlHU015UlllYzJWak9tSmUr?= =?utf-8?B?bmZ5QjZNSFA1c0hlV3RSNHRlQytCNkRhS2Z3T0Vpd3crVG11YzZYeUdrSlUv?= =?utf-8?B?dEwvWHhab05UeVBHK2Q4SFVrNUlOWTBXYXo2WkE4Uk9lZFRNNzVCNzNybDVl?= =?utf-8?B?VkI5YkZHVlVQTGx1VUR0ZTZ6UVpUYXZjTUYzcTE5MTdsTzJ5U2dzbVY5UUlK?= =?utf-8?B?S3FLKzlqM1pzb1dWOC9UaFlsenFxMEpOS0kvTHQrbXhYNmIxcjVHbnpHek9u?= =?utf-8?B?MHQ5VkNySnpwMTFiQmV0ZThWczIzWWRkTUxCQVJPMXRTdzVhWkRHSWZOcFIw?= =?utf-8?B?dE1NYzdWTEMvVmJsUE1FbnRMWDVaTDhrMjV2bWlqR0NJQW40SENUTkk2Q1lh?= =?utf-8?B?L1Y0K0p1SURXdW9iRm1mM0hDakJ3c1FDT2VORXpteFZZNmwxazFOeVExWjhp?= =?utf-8?B?cTBHR0x5UGd6QklEc001czMwa1N2V3ZZQ2FGY3lBSC9HVzA2R3pEQ1dSbGxX?= =?utf-8?B?T242R3NPeGdIS3U1NTR3VXBVRktXeGdNdmRQWkxPTURURENxQzlvZDZxa1dz?= =?utf-8?Q?ySwY=3D?= X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb08.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(376014)(1800799024)(36860700013);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jan 2026 16:29:01.1713 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 78467549-a857-4ac2-fcb7-08de4c7788c0 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=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00001508.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR12MB8960 On 1/5/26 07:27, Ilpo Järvinen wrote: > On Fri, 12 Dec 2025, Lizhi Hou wrote: > >> From: Shyam Sundar S K >> >> The PMF driver retrieves NPU metrics data from the PMFW. Introduce a new >> interface to make NPU metrics accessible to other drivers like AMDXDNA >> driver, which can access and utilize this information as needed. >> >> Reviewed-by: Mario Limonciello >> Co-developed-by: Patil Rajesh Reddy >> Signed-off-by: Patil Rajesh Reddy >> Signed-off-by: Shyam Sundar S K >> Signed-off-by: Lizhi Hou >> --- >> drivers/platform/x86/amd/pmf/core.c | 75 +++++++++++++++++++++++++++++ >> drivers/platform/x86/amd/pmf/pmf.h | 2 + >> include/linux/amd-pmf-io.h | 21 ++++++++ >> 3 files changed, 98 insertions(+) >> >> diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c >> index a6a5d416edf9..8e4ce91b3527 100644 >> --- a/drivers/platform/x86/amd/pmf/core.c >> +++ b/drivers/platform/x86/amd/pmf/core.c >> @@ -8,12 +8,15 @@ >> * Author: Shyam Sundar S K >> */ >> >> +#include >> +#include >> #include >> #include >> #include >> #include >> #include >> #include >> +#include >> #include >> #include "pmf.h" >> >> @@ -53,6 +56,8 @@ static bool force_load; >> module_param(force_load, bool, 0444); >> MODULE_PARM_DESC(force_load, "Force load this driver on supported older platforms (experimental)"); >> >> +static struct device *pmf_device; >> + >> static int amd_pmf_pwr_src_notify_call(struct notifier_block *nb, unsigned long event, void *data) >> { >> struct amd_pmf_dev *pmf = container_of(nb, struct amd_pmf_dev, pwr_src_notifier); >> @@ -314,6 +319,70 @@ int amd_pmf_init_metrics_table(struct amd_pmf_dev *dev) >> return 0; >> } >> >> +static int is_npu_metrics_supported(struct amd_pmf_dev *pdev) >> +{ >> + switch (pdev->cpu_id) { >> + case PCI_DEVICE_ID_AMD_1AH_M20H_ROOT: >> + case PCI_DEVICE_ID_AMD_1AH_M60H_ROOT: >> + return 0; >> + default: >> + return -EOPNOTSUPP; >> + } >> +} >> + >> +static int amd_pmf_get_smu_metrics(struct amd_pmf_dev *dev, struct amd_pmf_npu_metrics *data) >> +{ >> + int ret, i; >> + >> + guard(mutex)(&dev->metrics_mutex); >> + >> + if (is_npu_metrics_supported(dev)) >> + return -EOPNOTSUPP; > Generally, we don't want to shadow error codes like this so please save it > from is_npu_metrics_supported() and do return ret; Sure. > >> + >> + ret = amd_pmf_set_dram_addr(dev, true); >> + if (ret) >> + return ret; >> + >> + memset(dev->buf, 0, dev->mtable_size); >> + >> + /* Send SMU command to get NPU metrics */ >> + ret = amd_pmf_send_cmd(dev, SET_TRANSFER_TABLE, SET_CMD, METRICS_TABLE_ID, NULL); >> + if (ret) { >> + dev_err(dev->dev, "SMU command failed to get NPU metrics: %d\n", ret); >> + return ret; >> + } >> + >> + memcpy(&dev->m_table_v2, dev->buf, dev->mtable_size); >> + >> + data->npuclk_freq = dev->m_table_v2.npuclk_freq; >> + for (i = 0; i < ARRAY_SIZE(data->npu_busy); i++) >> + data->npu_busy[i] = dev->m_table_v2.npu_busy[i]; >> + data->npu_power = dev->m_table_v2.npu_power; > To confirm, so only this field is currently going to be used? Yes. Only this field will be used for now. Lizhi > > -- > i. > >> + data->mpnpuclk_freq = dev->m_table_v2.mpnpuclk_freq; >> + data->npu_reads = dev->m_table_v2.npu_reads; >> + data->npu_writes = dev->m_table_v2.npu_writes; >> + >> + return 0; >> +} >> + >> +int amd_pmf_get_npu_data(struct amd_pmf_npu_metrics *info) >> +{ >> + struct amd_pmf_dev *pdev; >> + >> + if (!info) >> + return -EINVAL; >> + >> + if (!pmf_device) >> + return -ENODEV; >> + >> + pdev = dev_get_drvdata(pmf_device); >> + if (!pdev) >> + return -ENODEV; >> + >> + return amd_pmf_get_smu_metrics(pdev, info); >> +} >> +EXPORT_SYMBOL_GPL(amd_pmf_get_npu_data); >> + >> static int amd_pmf_suspend_handler(struct device *dev) >> { >> struct amd_pmf_dev *pdev = dev_get_drvdata(dev); >> @@ -469,6 +538,10 @@ static int amd_pmf_probe(struct platform_device *pdev) >> mutex_init(&dev->update_mutex); >> mutex_init(&dev->cb_mutex); >> >> + err = devm_mutex_init(dev->dev, &dev->metrics_mutex); >> + if (err) >> + return err; >> + >> apmf_acpi_init(dev); >> platform_set_drvdata(pdev, dev); >> amd_pmf_dbgfs_register(dev); >> @@ -477,6 +550,8 @@ static int amd_pmf_probe(struct platform_device *pdev) >> if (is_apmf_func_supported(dev, APMF_FUNC_SBIOS_HEARTBEAT_V2)) >> amd_pmf_notify_sbios_heartbeat_event_v2(dev, ON_LOAD); >> >> + pmf_device = dev->dev; >> + >> dev_info(dev->dev, "registered PMF device successfully\n"); >> >> return 0; >> diff --git a/drivers/platform/x86/amd/pmf/pmf.h b/drivers/platform/x86/amd/pmf/pmf.h >> index f07e9f4c660a..0354cc5dc79e 100644 >> --- a/drivers/platform/x86/amd/pmf/pmf.h >> +++ b/drivers/platform/x86/amd/pmf/pmf.h >> @@ -12,6 +12,7 @@ >> #define PMF_H >> >> #include >> +#include >> #include >> #include >> #include >> @@ -412,6 +413,7 @@ struct amd_pmf_dev { >> struct apmf_sbios_req_v1 req1; >> struct pmf_bios_inputs_prev cb_prev; /* To preserve custom BIOS inputs */ >> bool cb_flag; /* To handle first custom BIOS input */ >> + struct mutex metrics_mutex; >> }; >> >> struct apmf_sps_prop_granular_v2 { >> diff --git a/include/linux/amd-pmf-io.h b/include/linux/amd-pmf-io.h >> index 6fa510f419c0..55198d2875cc 100644 >> --- a/include/linux/amd-pmf-io.h >> +++ b/include/linux/amd-pmf-io.h >> @@ -61,5 +61,26 @@ enum laptop_placement { >> LP_UNDEFINED, >> }; >> >> +/** >> + * struct amd_pmf_npu_metrics: Get NPU metrics data from PMF driver >> + * @npuclk_freq: NPU clock frequency [MHz] >> + * @npu_busy: NPU busy % [0-100] >> + * @npu_power: NPU power [mW] >> + * @mpnpuclk_freq: MPNPU [MHz] >> + * @npu_reads: NPU read bandwidth [MB/sec] >> + * @npu_writes: NPU write bandwidth [MB/sec] >> + */ >> +struct amd_pmf_npu_metrics { >> + u16 npuclk_freq; >> + u16 npu_busy[8]; >> + u16 npu_power; >> + u16 mpnpuclk_freq; >> + u16 npu_reads; >> + u16 npu_writes; >> +}; >> + >> int amd_get_sfh_info(struct amd_sfh_info *sfh_info, enum sfh_message_type op); >> + >> +/* AMD PMF and NPU interface */ >> +int amd_pmf_get_npu_data(struct amd_pmf_npu_metrics *info); >> #endif >>