From: Shiju Jose <shiju.jose@xxxxxxxxxx> 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 <shiju.jose@xxxxxxxxxx> --- .../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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +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@xxxxxxxxxxxxxxx +Description: + (RO) Supported list of DDR5 ECS threshold count per GB of + memory cells. -- 2.34.1
