From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AC381385502; Wed, 8 Apr 2026 22:21:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775686912; cv=none; b=ohHI7q6HwC18/AUDU297/haLn7M0QoZx6sMUaRGgqafAwjdu9NnT6BmHoXj6mIqMw/hTU+FJ2FLtPdgWosPIKNiSOovhp2ARjMolhHbopmEwfzMJsByXlSyZT/x6WJPfVgKPm74ucdy7SmTM54JNu6hJg6BJhOfLYsha2ELEfmk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775686912; c=relaxed/simple; bh=EHR8uC/EOCKGygtxJT4FTc44rZFfCWiTk+DZ32X05QQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=HUKE8Rop1U/UWXzDHs/jxX9/CDMeNZzjLlgAJ+qPDtfqxb+jvxjlWbENZg7LhMnVC9ztCp1vbfVXBPXqIRoUpWE+KOnJQy/pJGn4zrCs0gmU8GEuYytJOLSkrYM4AAo6aKvkCxkHdO6D3fgf2kg7SKefV+NIMSG6kV+0ezRokX8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=N9iiwS0p; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="N9iiwS0p" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1775686911; x=1807222911; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=EHR8uC/EOCKGygtxJT4FTc44rZFfCWiTk+DZ32X05QQ=; b=N9iiwS0p9ll2ECrkSX4H1bh62JezLtdaBoAcxW0ilfarV21HmwCILTnC pgGeW9PXqsKtzUZCkbo8zY/Mh8duVSr7ctAQQVrdUH05djhjC6swO79Nv 3XcuHshfTAgItEj0ah/V/bL0Xul0F2NxT04WVFtfLGxsegH5h1wmCQx3m sLLshT5xvZyIeW/EkZwq5BBoiBXmL68ZBOevTMKk2Y929ht1ou4Bn3WOP bBoJqgPrbB8S+PLXQV3q6p/KamuATnP+i0yUps68zWTRbeuh3eVCQKb/J Fl/yY7M+gwx0QHM+1StdHN8J83GjAO67fFbv72TbIPAGFjiIeMum3ihG9 A==; X-CSE-ConnectionGUID: zsoVRqDZQsWS7pDB9ghSNg== X-CSE-MsgGUID: D/GoUZMeQHGGMH4hTFuDEQ== X-IronPort-AV: E=McAfee;i="6800,10657,11753"; a="88068074" X-IronPort-AV: E=Sophos;i="6.23,168,1770624000"; d="scan'208";a="88068074" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2026 15:21:48 -0700 X-CSE-ConnectionGUID: PV73TY5RSj+dH4H9wcLvqQ== X-CSE-MsgGUID: R5RPC4QeQwSaHb3ws35FcA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,168,1770624000"; d="scan'208";a="223837825" Received: from aschende-mobl.amr.corp.intel.com (HELO xpardee-desk.intel.com) ([10.125.108.200]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Apr 2026 15:21:48 -0700 From: Xi Pardee To: xi.pardee@linux.intel.com, irenic.rajneesh@gmail.com, david.e.box@linux.intel.com, ilpo.jarvinen@linux.intel.com, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH v2 2/7] platform/x86/intel/pmc: Enable PkgC LTR blocking counter Date: Wed, 8 Apr 2026 15:21:35 -0700 Message-ID: <20260408222144.3288928-3-xi.pardee@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260408222144.3288928-1-xi.pardee@linux.intel.com> References: <20260408222144.3288928-1-xi.pardee@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Enable the Package C-state LTR blocking counter in the PMT telemetry region. This counter records how many times any Package C-state entry is blocked for the specified reasons. Signed-off-by: Xi Pardee --- drivers/platform/x86/intel/pmc/core.c | 74 +++++++++++++++++++++++---- drivers/platform/x86/intel/pmc/core.h | 15 +++++- 2 files changed, 77 insertions(+), 12 deletions(-) diff --git a/drivers/platform/x86/intel/pmc/core.c b/drivers/platform/x86/intel/pmc/core.c index c8a92d6235203..5c519942ec58c 100644 --- a/drivers/platform/x86/intel/pmc/core.c +++ b/drivers/platform/x86/intel/pmc/core.c @@ -1071,6 +1071,29 @@ static int pmc_core_die_c6_us_show(struct seq_file *s, void *unused) } DEFINE_SHOW_ATTRIBUTE(pmc_core_die_c6_us); +static int pmc_core_pkgc_ltr_blocker_show(struct seq_file *s, void *unused) +{ + struct pmc_dev *pmcdev = s->private; + const char **pkgc_ltr_blocker_counters; + unsigned int i; + u32 counter; + int ret; + + pkgc_ltr_blocker_counters = pmcdev->pkgc_ltr_blocker_counters; + for (i = 0; pkgc_ltr_blocker_counters[i]; i++) { + ret = pmt_telem_read32(pmcdev->pc_ep, + pmcdev->pkgc_ltr_blocker_offset + i, + &counter, 1); + + if (ret) + return ret; + seq_printf(s, "%-30s %-30u\n", pkgc_ltr_blocker_counters[i], counter); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(pmc_core_pkgc_ltr_blocker); + static int pmc_core_lpm_latch_mode_show(struct seq_file *s, void *unused) { struct pmc_dev *pmcdev = s->private; @@ -1322,7 +1345,7 @@ static struct telem_endpoint *pmc_core_register_endpoint(struct pci_dev *pcidev, return ERR_PTR(-ENODEV); } -void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, u32 *guids) +void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info) { struct telem_endpoint *ep; @@ -1333,16 +1356,32 @@ void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, u32 *guids) return; } - ep = pmc_core_register_endpoint(pcidev, guids); - if (IS_ERR(ep)) { - dev_err(&pmcdev->pdev->dev, - "pmc_core: couldn't get DMU telem endpoint %ld", - PTR_ERR(ep)); - return; + if (pmc_dev_info->dmu_guids) { + ep = pmc_core_register_endpoint(pcidev, pmc_dev_info->dmu_guids); + if (IS_ERR(ep)) { + dev_err(&pmcdev->pdev->dev, + "pmc_core: couldn't get DMU telem endpoint %ld", + PTR_ERR(ep)); + return; + } + + pmcdev->punit_ep = ep; + pmcdev->die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET; } - pmcdev->punit_ep = ep; - pmcdev->die_c6_offset = MTL_PMT_DMU_DIE_C6_OFFSET; + if (pmc_dev_info->pc_guid) { + ep = pmt_telem_find_and_register_endpoint(&pcidev->dev, pmc_dev_info->pc_guid, 0); + if (IS_ERR(ep)) { + dev_err(&pmcdev->pdev->dev, + "pmc_core: couldn't get Package C-state telem endpoint %ld", + PTR_ERR(ep)); + return; + } + + pmcdev->pc_ep = ep; + pmcdev->pkgc_ltr_blocker_counters = pmc_dev_info->pkgc_ltr_blocker_counters; + pmcdev->pkgc_ltr_blocker_offset = pmc_dev_info->pkgc_ltr_blocker_offset; + } } void pmc_core_set_device_d3(unsigned int device) @@ -1466,6 +1505,13 @@ static void pmc_core_dbgfs_register(struct pmc_dev *pmcdev, struct pmc_dev_info pmcdev->dbgfs_dir, pmcdev, &pmc_core_die_c6_us_fops); } + + if (pmcdev->pc_ep) { + debugfs_create_file("pkgc_ltr_blocker_show", 0444, + pmcdev->dbgfs_dir, pmcdev, + &pmc_core_pkgc_ltr_blocker_fops); + } + } /* @@ -1716,8 +1762,8 @@ int generic_core_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info) } pmc_core_get_low_power_modes(pmcdev); - if (pmc_dev_info->dmu_guids) - pmc_core_punit_pmt_init(pmcdev, pmc_dev_info->dmu_guids); + if (pmc_dev_info->dmu_guids || pmc_dev_info->pc_guid) + pmc_core_punit_pmt_init(pmcdev, pmc_dev_info); if (ssram) { ret = pmc_core_get_telem_info(pmcdev, pmc_dev_info); @@ -1738,6 +1784,9 @@ int generic_core_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info) if (pmcdev->punit_ep) pmt_telem_unregister_endpoint(pmcdev->punit_ep); + if (pmcdev->pc_ep) + pmt_telem_unregister_endpoint(pmcdev->pc_ep); + return ret; } @@ -1834,6 +1883,9 @@ static void pmc_core_clean_structure(struct platform_device *pdev) if (pmcdev->punit_ep) pmt_telem_unregister_endpoint(pmcdev->punit_ep); + if (pmcdev->pc_ep) + pmt_telem_unregister_endpoint(pmcdev->pc_ep); + platform_set_drvdata(pdev, NULL); } diff --git a/drivers/platform/x86/intel/pmc/core.h b/drivers/platform/x86/intel/pmc/core.h index 118c8740ad3aa..a20aab73c1409 100644 --- a/drivers/platform/x86/intel/pmc/core.h +++ b/drivers/platform/x86/intel/pmc/core.h @@ -453,6 +453,9 @@ struct pmc { * @suspend: Function to perform platform specific suspend * @resume: Function to perform platform specific resume * + * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters + * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region + * * pmc_dev contains info about power management controller device. */ struct pmc_dev { @@ -471,8 +474,12 @@ struct pmc_dev { u8 num_of_pkgc; u32 die_c6_offset; + struct telem_endpoint *pc_ep; struct telem_endpoint *punit_ep; struct pmc_info *regmap_list; + + const char **pkgc_ltr_blocker_counters; + u32 pkgc_ltr_blocker_offset; }; enum pmc_index { @@ -486,12 +493,15 @@ enum pmc_index { * struct pmc_dev_info - Structure to keep PMC device info * @pci_func: Function number of the primary PMC * @dmu_guids: List of Die Management Unit GUID + * @pc_guid: GUID for telemetry region to read PKGC blocker info + * @pkgc_ltr_blocker_offset: Offset to PKGC LTR blockers in telemetry region * @regmap_list: Pointer to a list of pmc_info structure that could be * available for the platform. When set, this field implies * SSRAM support. * @map: Pointer to a pmc_reg_map struct that contains platform * specific attributes of the primary PMC * @sub_req_show: File operations to show substate requirements + * @pkgc_ltr_blocker_counters: Array of PKGC LTR blocker counters * @suspend: Function to perform platform specific suspend * @resume: Function to perform platform specific resume * @init: Function to perform platform specific init action @@ -500,9 +510,12 @@ enum pmc_index { struct pmc_dev_info { u8 pci_func; u32 *dmu_guids; + u32 pc_guid; + u32 pkgc_ltr_blocker_offset; struct pmc_info *regmap_list; const struct pmc_reg_map *map; const struct file_operations *sub_req_show; + const char **pkgc_ltr_blocker_counters; void (*suspend)(struct pmc_dev *pmcdev); int (*resume)(struct pmc_dev *pmcdev); int (*init)(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info); @@ -535,7 +548,7 @@ int pmc_core_send_ltr_ignore(struct pmc_dev *pmcdev, u32 value, int ignore); int pmc_core_resume_common(struct pmc_dev *pmcdev); int get_primary_reg_base(struct pmc *pmc); -void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, u32 *guids); +void pmc_core_punit_pmt_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info); void pmc_core_set_device_d3(unsigned int device); int generic_core_init(struct pmc_dev *pmcdev, struct pmc_dev_info *pmc_dev_info); -- 2.43.0