From patchwork Tue Jan 25 01:11:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winiarska, Iwona" X-Patchwork-Id: 12723272 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id BBD34C433FE for ; Tue, 25 Jan 2022 03:44:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1381959AbiAYDmd (ORCPT ); Mon, 24 Jan 2022 22:42:33 -0500 Received: from mga09.intel.com ([134.134.136.24]:16189 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S3415308AbiAYBkJ (ORCPT ); Mon, 24 Jan 2022 20:40:09 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1643074809; x=1674610809; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=ltiCJCo8pMi8Z3TpeCeoiPuf/ypSwEPDWPZkr99jflM=; b=WYNrIabZNGBxJLrNm/pbZz+SMjHOZF9p0vBVZSTbGNQmqGqfGRd8iCuW lyagTEn0DgyqI53U0PuvxTZx6uvYiUt/Ta146Ki3UOrSRaAbtXk6qwINV pwDVeVhX0FLPoofrqkjeZPG1g3euDKGirbaqP68fW3lenIHoh1rm0XsT6 NpJc6txKuIx7Sqzboib+mlk/jpAl/5ntGVoi6eDxcu5mFMaM8BK20000d gYvwQ1AhaQMvbxLzwocV3XfdmgzMfeIfEb8HnEfqd90eynuRmYmZOldV6 bjB40sr9KVFWaioLrvGaHbOYgCx7mkiQ9OvhntIDhrHzguNkohaWZqngc Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10237"; a="245971822" X-IronPort-AV: E=Sophos;i="5.88,313,1635231600"; d="scan'208";a="245971822" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 17:17:36 -0800 X-IronPort-AV: E=Sophos;i="5.88,313,1635231600"; d="scan'208";a="479302453" Received: from kerguder-mobl.ger.corp.intel.com (HELO localhost) ([10.249.158.133]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2022 17:17:27 -0800 From: Iwona Winiarska To: linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, Greg Kroah-Hartman Cc: 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, Rob Herring , Joel Stanley , Andrew Jeffery , Jean Delvare , Guenter Roeck , Arnd Bergmann , Olof Johansson , Jonathan Corbet , Borislav Petkov , Pierre-Louis Bossart , Tony Luck , Andy Shevchenko , Dan Williams , Randy Dunlap , Zev Weiss , David Muller , Dave Hansen , Billy Tsai , Jae Hyun Yoo , Iwona Winiarska Subject: [PATCH v6 12/13] docs: hwmon: Document PECI drivers Date: Tue, 25 Jan 2022 02:11:03 +0100 Message-Id: <20220125011104.2480133-13-iwona.winiarska@intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20220125011104.2480133-1-iwona.winiarska@intel.com> References: <20220125011104.2480133-1-iwona.winiarska@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@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 Temperature Sensor on DIMM readings. Signed-off-by: Jae Hyun Yoo Co-developed-by: Iwona Winiarska Signed-off-by: Iwona Winiarska Reviewed-by: Pierre-Louis Bossart Acked-by: Guenter Roeck --- Documentation/hwmon/index.rst | 2 + Documentation/hwmon/peci-cputemp.rst | 90 +++++++++++++++++++++++++++ Documentation/hwmon/peci-dimmtemp.rst | 57 +++++++++++++++++ MAINTAINERS | 2 + 4 files changed, 151 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 df20022c741f..f387f661e1d7 100644 --- a/Documentation/hwmon/index.rst +++ b/Documentation/hwmon/index.rst @@ -161,6 +161,8 @@ 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..fe0422248dc5 --- /dev/null +++ b/Documentation/hwmon/peci-cputemp.rst @@ -0,0 +1,90 @@ +.. 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 temperature of the CPU package scaled + to match DTS thermal profile. +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. + +======================= ======================================================= diff --git a/Documentation/hwmon/peci-dimmtemp.rst b/Documentation/hwmon/peci-dimmtemp.rst new file mode 100644 index 000000000000..e562aed620de --- /dev/null +++ b/Documentation/hwmon/peci-dimmtemp.rst @@ -0,0 +1,57 @@ +.. 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 +Temperature sensor on DIMM readings 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 369ac3524f33..d821aeaaa2d3 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15103,6 +15103,8 @@ PECI HARDWARE MONITORING DRIVERS M: Iwona Winiarska 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