From patchwork Mon Jul 12 22:04:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Iwona Winiarska X-Patchwork-Id: 473190 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E3C0C07E9A for ; Mon, 12 Jul 2021 22:11:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1776F61289 for ; Mon, 12 Jul 2021 22:11:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231423AbhGLWOk (ORCPT ); Mon, 12 Jul 2021 18:14:40 -0400 Received: from mga18.intel.com ([134.134.136.126]:10147 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230518AbhGLWOk (ORCPT ); Mon, 12 Jul 2021 18:14:40 -0400 X-IronPort-AV: E=McAfee;i="6200,9189,10043"; a="197335227" X-IronPort-AV: E=Sophos;i="5.84,235,1620716400"; d="scan'208";a="197335227" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2021 15:11:51 -0700 X-IronPort-AV: E=Sophos;i="5.84,235,1620716400"; d="scan'208";a="464413638" Received: from jzloch-mobl1.ger.corp.intel.com (HELO localhost) ([10.249.136.11]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jul 2021 15:11:45 -0700 From: Iwona Winiarska To: linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org Cc: x86@kernel.org, devicetree@vger.kernel.org, linux-aspeed@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-hwmon@vger.kernel.org, linux-doc@vger.kernel.org, Greg Kroah-Hartman , Rob Herring , Joel Stanley , Andrew Jeffery , Jean Delvare , Guenter Roeck , Jonathan Corbet , Thomas Gleixner , Andy Lutomirski , Ingo Molnar , Borislav Petkov , Yazen Ghannam , Mauro Carvalho Chehab , Pierre-Louis Bossart , Tony Luck , Andy Shevchenko , Jae Hyun Yoo , Iwona Winiarska Subject: [PATCH 13/14] docs: hwmon: Document PECI drivers Date: Tue, 13 Jul 2021 00:04:46 +0200 Message-Id: <20210712220447.957418-14-iwona.winiarska@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210712220447.957418-1-iwona.winiarska@intel.com> References: <20210712220447.957418-1-iwona.winiarska@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Jae Hyun Yoo Add documentation for peci-cputemp driver that provides DTS thermal readings for CPU packages and CPU cores and peci-dimmtemp driver that provides DTS thermal readings for DIMMs. Signed-off-by: Jae Hyun Yoo Co-developed-by: Iwona Winiarska Signed-off-by: Iwona Winiarska Reviewed-by: Pierre-Louis Bossart --- Documentation/hwmon/index.rst | 2 + Documentation/hwmon/peci-cputemp.rst | 93 +++++++++++++++++++++++++++ Documentation/hwmon/peci-dimmtemp.rst | 58 +++++++++++++++++ MAINTAINERS | 2 + 4 files changed, 155 insertions(+) create mode 100644 Documentation/hwmon/peci-cputemp.rst create mode 100644 Documentation/hwmon/peci-dimmtemp.rst diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst index bc01601ea81a..cc76b5b3f791 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -154,6 +154,8 @@ Hardware Monitoring Kernel Drivers pcf8591 pim4328 pm6764tr + peci-cputemp + peci-dimmtemp pmbus powr1220 pxe1610 diff --git a/Documentation/hwmon/peci-cputemp.rst b/Documentation/hwmon/peci-cputemp.rst new file mode 100644 index 000000000000..d3a218ba810a --- /dev/null +++ b/Documentation/hwmon/peci-cputemp.rst @@ -0,0 +1,93 @@ +.. SPDX-License-Identifier: GPL-2.0-only + +Kernel driver peci-cputemp +========================== + +Supported chips: + One of Intel server CPUs listed below which is connected to a PECI bus. + * Intel Xeon E5/E7 v3 server processors + Intel Xeon E5-14xx v3 family + Intel Xeon E5-24xx v3 family + Intel Xeon E5-16xx v3 family + Intel Xeon E5-26xx v3 family + Intel Xeon E5-46xx v3 family + Intel Xeon E7-48xx v3 family + Intel Xeon E7-88xx v3 family + * Intel Xeon E5/E7 v4 server processors + Intel Xeon E5-16xx v4 family + Intel Xeon E5-26xx v4 family + Intel Xeon E5-46xx v4 family + Intel Xeon E7-48xx v4 family + Intel Xeon E7-88xx v4 family + * Intel Xeon Scalable server processors + Intel Xeon D family + Intel Xeon Bronze family + Intel Xeon Silver family + Intel Xeon Gold family + Intel Xeon Platinum family + + Datasheet: Available from http://www.intel.com/design/literature.htm + +Author: Jae Hyun Yoo + +Description +----------- + +This driver implements a generic PECI hwmon feature which provides Digital +Thermal Sensor (DTS) thermal readings of the CPU package and CPU cores that are +accessible via the processor PECI interface. + +All temperature values are given in millidegree Celsius and will be measurable +only when the target CPU is powered on. + +Sysfs interface +------------------- + +======================= ======================================================= +temp1_label "Die" +temp1_input Provides current die temperature of the CPU package. +temp1_max Provides thermal control temperature of the CPU package + which is also known as Tcontrol. +temp1_crit Provides shutdown temperature of the CPU package which + is also known as the maximum processor junction + temperature, Tjmax or Tprochot. +temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of + the CPU package. + +temp2_label "DTS" +temp2_input Provides current DTS temperature of the CPU package. +temp2_max Provides thermal control temperature of the CPU package + which is also known as Tcontrol. +temp2_crit Provides shutdown temperature of the CPU package which + is also known as the maximum processor junction + temperature, Tjmax or Tprochot. +temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of + the CPU package. + +temp3_label "Tcontrol" +temp3_input Provides current Tcontrol temperature of the CPU + package which is also known as Fan Temperature target. + Indicates the relative value from thermal monitor trip + temperature at which fans should be engaged. +temp3_crit Provides Tcontrol critical value of the CPU package + which is same to Tjmax. + +temp4_label "Tthrottle" +temp4_input Provides current Tthrottle temperature of the CPU + package. Used for throttling temperature. If this value + is allowed and lower than Tjmax - the throttle will + occur and reported at lower than Tjmax. + +temp5_label "Tjmax" +temp5_input Provides the maximum junction temperature, Tjmax of the + CPU package. + +temp[6-N]_label Provides string "Core X", where X is resolved core + number. +temp[6-N]_input Provides current temperature of each core. +temp[6-N]_max Provides thermal control temperature of the core. +temp[6-N]_crit Provides shutdown temperature of the core. +temp[6-N]_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of + the core. + +======================= ======================================================= diff --git a/Documentation/hwmon/peci-dimmtemp.rst b/Documentation/hwmon/peci-dimmtemp.rst new file mode 100644 index 000000000000..1778d9317e43 --- /dev/null +++ b/Documentation/hwmon/peci-dimmtemp.rst @@ -0,0 +1,58 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver peci-dimmtemp +=========================== + +Supported chips: + One of Intel server CPUs listed below which is connected to a PECI bus. + * Intel Xeon E5/E7 v3 server processors + Intel Xeon E5-14xx v3 family + Intel Xeon E5-24xx v3 family + Intel Xeon E5-16xx v3 family + Intel Xeon E5-26xx v3 family + Intel Xeon E5-46xx v3 family + Intel Xeon E7-48xx v3 family + Intel Xeon E7-88xx v3 family + * Intel Xeon E5/E7 v4 server processors + Intel Xeon E5-16xx v4 family + Intel Xeon E5-26xx v4 family + Intel Xeon E5-46xx v4 family + Intel Xeon E7-48xx v4 family + Intel Xeon E7-88xx v4 family + * Intel Xeon Scalable server processors + Intel Xeon D family + Intel Xeon Bronze family + Intel Xeon Silver family + Intel Xeon Gold family + Intel Xeon Platinum family + + Datasheet: Available from http://www.intel.com/design/literature.htm + +Author: Jae Hyun Yoo + +Description +----------- + +This driver implements a generic PECI hwmon feature which provides Digital +Thermal Sensor (DTS) thermal readings of DIMM components that are accessible +via the processor PECI interface. + +All temperature values are given in millidegree Celsius and will be measurable +only when the target CPU is powered on. + +Sysfs interface +------------------- + +======================= ======================================================= + +temp[N]_label Provides string "DIMM CI", where C is DIMM channel and + I is DIMM index of the populated DIMM. +temp[N]_input Provides current temperature of the populated DIMM. +temp[N]_max Provides thermal control temperature of the DIMM. +temp[N]_crit Provides shutdown temperature of the DIMM. + +======================= ======================================================= + +Note: + DIMM temperature attributes will appear when the client CPU's BIOS + completes memory training and testing. diff --git a/MAINTAINERS b/MAINTAINERS index 35ba9e3646bd..d16da127bbdc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14509,6 +14509,8 @@ M: Iwona Winiarska R: Jae Hyun Yoo L: linux-hwmon@vger.kernel.org S: Supported +F: Documentation/hwmon/peci-cputemp.rst +F: Documentation/hwmon/peci-dimmtemp.rst F: drivers/hwmon/peci/ PECI SUBSYSTEM