From patchwork Thu Nov 30 19:23:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shiju Jose X-Patchwork-Id: 748544 Authentication-Results: smtp.subspace.kernel.org; dkim=none 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> Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: lhrpeml500004.china.huawei.com (7.191.163.9) To lhrpeml500006.china.huawei.com (7.191.161.198) 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-configure diff --git a/Documentation/ABI/testing/sysfs-class-cxl-scrub-configure b/Documentation/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.