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Message-ID: <20231121101844.1161-11-shiju.jose@huawei.com>
Date: Tue, 21 Nov 2023 18:18:43 +0800
From: <shiju.jose@...wei.com>
To: <linux-cxl@...r.kernel.org>, <linux-mm@...ck.org>,
<dave@...olabs.net>, <jonathan.cameron@...wei.com>,
<dave.jiang@...el.com>, <alison.schofield@...el.com>,
<vishal.l.verma@...el.com>, <ira.weiny@...el.com>,
<dan.j.williams@...el.com>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<david@...hat.com>, <Vilas.Sridharan@....com>, <leo.duran@....com>,
<Yazen.Ghannam@....com>, <rientjes@...gle.com>,
<jiaqiyan@...gle.com>, <tony.luck@...el.com>, <Jon.Grimm@....com>,
<dave.hansen@...ux.intel.com>, <rafael@...nel.org>,
<lenb@...nel.org>, <naoya.horiguchi@....com>,
<james.morse@....com>, <jthoughton@...gle.com>,
<somasundaram.a@....com>, <erdemaktas@...gle.com>,
<pgonda@...gle.com>, <duenwen@...gle.com>,
<mike.malvestuto@...el.com>, <gthelen@...gle.com>,
<wschwartz@...erecomputing.com>, <dferguson@...erecomputing.com>,
<tanxiaofei@...wei.com>, <prime.zeng@...ilicon.com>,
<kangkang.shen@...urewei.com>, <wanghuiqiang@...wei.com>,
<linuxarm@...wei.com>, <shiju.jose@...wei.com>
Subject: [PATCH v2 10/10] cxl: scrub: sysfs: Add Documentation for CXL memory device scrub control attributes
From: Shiju Jose <shiju.jose@...wei.com>
Add sysfs documentation entries for the CXL memory device scrub
control attributes those are exposed in /sys/class/scrub/ by the
scrub driver. These attributes support configuring a CXL memory
device scrub.
Signed-off-by: Shiju Jose <shiju.jose@...wei.com>
---
.../testing/sysfs-class-cxl-scrub-configure | 135 ++++++++++++++++++
1 file changed, 135 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..57ba63d5390f
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-class-cxl-scrub-configure
@@ -0,0 +1,135 @@
+What: /sys/class/scrub/
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ The scrub/ class subdirectory belongs to the scrub
+ subsystem.
+
+What: /sys/class/scrub/scrubX/
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ The /sys/class/scrub/scrub{0,1,2,3,...} directories
+ correspond to each scrub device.
+
+What: /sys/class/scrub/scrubX/name
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ (RO) name of the memory scrub device
+
+What: /sys/class/scrub/scrubX/regionY/
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ The /sys/class/scrub/scrubX/region{0,1,2,3,...}
+ directories correspond to each scrub region under a scrub device.
+ Scrub region is a physical address range or for example
+ memory media FRU of DDR5 ECS feature for which scrub may be
+ separately controlled.
+
+What: /sys/class/scrub/scrubX/regionY/enable
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ (WO) Start/Stop CXL memory patrol scrub.
+ 1 - enable the CXL memory patrol scrub.
+ 0 - disable the CXL memory patrol scrub.
+
+What: /sys/class/scrub/scrubX/regionY/speed
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ (RW) The scrub cycle to set for the CXL memory
+ patrol scrub and it must be within the supported
+ range. The unit of the scrub cycle is hour.
+
+What: /sys/class/scrub/scrubX/regionY/speed_available
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.kernel.org
+Description:
+ (RO) Supported range of the scrub cycle by the
+ CXL memory patrol scrub.
+ The unit of the scrub cycle is hour.
+
+What: /sys/class/scrub/scrubX/regionY/ecs_log_entry_type
+Date: November 2023
+KernelVersion: 6.8
+Contact: linux-kernel@...r.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@...r.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@...r.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@...r.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@...r.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@...r.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@...r.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@...r.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@...r.kernel.org
+Description:
+ (RO) Supported list of DDR5 ECS threshold count per GB of
+ memory cells.
--
2.34.1
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