From nobody Wed Dec 17 00:18:27 2025 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 6732BC4167B for ; Thu, 30 Nov 2023 19:24:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1376467AbjK3TX5 (ORCPT ); Thu, 30 Nov 2023 14:23:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47844 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1376407AbjK3TXc (ORCPT ); Thu, 30 Nov 2023 14:23:32 -0500 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B6147D48; Thu, 30 Nov 2023 11:23:38 -0800 (PST) Received: from mail.maildlp.com (unknown [172.18.186.231]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Sh5h13JSpz6JB68; Fri, 1 Dec 2023 03:23:13 +0800 (CST) Received: from lhrpeml500006.china.huawei.com (unknown [7.191.161.198]) by mail.maildlp.com (Postfix) with ESMTPS id 9A87414058E; Fri, 1 Dec 2023 03:23:36 +0800 (CST) Received: from SecurePC30232.china.huawei.com (10.122.247.234) by lhrpeml500006.china.huawei.com (7.191.161.198) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Thu, 30 Nov 2023 19:23:35 +0000 From: To: , , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v4 11/11] cxl: scrub: sysfs: Add Documentation for CXL memory device scrub control attributes Date: Fri, 1 Dec 2023 03:23:13 +0800 Message-ID: <20231130192314.1220-12-shiju.jose@huawei.com> X-Mailer: git-send-email 2.35.1.windows.2 In-Reply-To: <20231130192314.1220-1-shiju.jose@huawei.com> References: <20231130192314.1220-1-shiju.jose@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Originating-IP: [10.122.247.234] X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500006.china.huawei.com (7.191.161.198) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Shiju Jose Add sysfs documentation for the CXL memory device scrub control attributes those are exposed in /sys/class/scrub/ by the scrub driver. These attributes support user configuring a CXL memory device scrub. Signed-off-by: Shiju Jose --- .../testing/sysfs-class-cxl-scrub-configure | 79 +++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-class-cxl-scrub-configu= re diff --git a/Documentation/ABI/testing/sysfs-class-cxl-scrub-configure b/Do= cumentation/ABI/testing/sysfs-class-cxl-scrub-configure new file mode 100644 index 000000000000..3f55522134cd --- /dev/null +++ b/Documentation/ABI/testing/sysfs-class-cxl-scrub-configure @@ -0,0 +1,79 @@ +See `Documentation/ABI/testing/sysfs-class-scrub-configure` for the +documentation of common scrub configure directory layout (/sys/class/scrub= /), +including the attributes used for configuring the CXL patrol scrub. +Following are the attributes used for configuring the CXL ECS. + +What: /sys/class/scrub/scrubX/regionY/ecs_log_entry_type +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RW) The log entry type of how the DDR5 ECS log is + reported. + 00b - per DRAM. + 01b - per memory media FRU. + +What: /sys/class/scrub/scrubX/regionY/ecs_log_entry_type_per_dram +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RO) Returns true if current log entry type of DDR5 ECS + region is per DRAM. + +What: /sys/class/scrub/scrubX/regionY/ecs_log_entry_type_per_memory_media +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RO) Returns true if current log entry type of DDR5 ECS + region is per memory media FRU. + +What: /sys/class/scrub/scrubX/regionY/mode +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RW) The mode of how the DDR5 ECS counts the errors. + 0 - ECS counts rows with errors. + 1 - ECS counts codewords with errors. + +What: /sys/class/scrub/scrubX/regionY/mode_counts_rows +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RO) Returns true if current mode of DDR5 ECS region + is counts rows with errors. + +What: /sys/class/scrub/scrubX/regionY/mode_counts_codewords +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RO) Returns true if current mode of DDR5 ECS region + is counts codewords with errors. + +What: /sys/class/scrub/scrubX/regionY/reset_counter +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (WO) DDR5 ECS reset ECC counter. + 0 - normal, ECC counter running actively. + 1 - reset ECC counter to the default value. + +What: /sys/class/scrub/scrubX/regionY/threshold +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RW) DDR5 ECS threshold count per GB of memory cells. + +What: /sys/class/scrub/scrubX/regionY/threshold_available +Date: November 2023 +KernelVersion: 6.8 +Contact: linux-kernel@vger.kernel.org +Description: + (RO) Supported list of DDR5 ECS threshold count per GB of + memory cells. --=20 2.34.1