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client-ip=165.204.84.17; helo=satlexmb08.amd.com; pr=C Received: from satlexmb08.amd.com (165.204.84.17) by SN1PEPF000252A0.mail.protection.outlook.com (10.167.242.7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9542.4 via Frontend Transport; Thu, 15 Jan 2026 16:49:02 +0000 Received: from satlexmb07.amd.com (10.181.42.216) by satlexmb08.amd.com (10.181.42.217) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.17; Thu, 15 Jan 2026 10:49:02 -0600 Received: from [172.19.71.207] (10.180.168.240) by satlexmb07.amd.com (10.181.42.216) with Microsoft SMTP Server id 15.2.2562.17 via Frontend Transport; Thu, 15 Jan 2026 08:49:01 -0800 Message-ID: Date: Thu, 15 Jan 2026 08:49:01 -0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH V3 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: <20260105172956.3732123-1-lizhi.hou@amd.com> <20260105172956.3732123-2-lizhi.hou@amd.com> <4d365fb4-08f5-0b2f-62df-b8f46b792953@linux.intel.com> From: Lizhi Hou In-Reply-To: <4d365fb4-08f5-0b2f-62df-b8f46b792953@linux.intel.com> Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jan 2026 16:49:02.9638 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4309e4f6-0d8d-40ab-ec6d-08de5455fd30 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: SN1PEPF000252A0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB6998 On 1/15/26 07:18, Ilpo Järvinen wrote: > On Mon, 5 Jan 2026, 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 >> [lizhi: save return value of is_npu_metrics_supported() and return it] >> Signed-off-by: Lizhi Hou >> --- >> drivers/platform/x86/amd/pmf/core.c | 76 +++++++++++++++++++++++++++++ >> drivers/platform/x86/amd/pmf/pmf.h | 2 + >> include/linux/amd-pmf-io.h | 21 ++++++++ >> 3 files changed, 99 insertions(+) >> >> diff --git a/drivers/platform/x86/amd/pmf/core.c b/drivers/platform/x86/amd/pmf/core.c >> index 8fc293c9c538..d180a39e03bf 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 +319,71 @@ 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); >> + >> + ret = is_npu_metrics_supported(dev); >> + if (ret) >> + return ret; >> + >> + 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; >> + 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); > One more thing, the export should be namespaced. > > And since I'll be applying only this patch and not do an IB, can you also > rebase it on top for the for-next branch. Sure, I will send a V4 patch. Lizhi >