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75 lines
2.4 KiB
Text
75 lines
2.4 KiB
Text
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What: /sys/bus/edac/devices/<dev-name>/ecs_fruX
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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The sysfs EDAC bus devices /<dev-name>/ecs_fruX subdirectory
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pertains to the memory media ECS (Error Check Scrub) control
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feature, where <dev-name> directory corresponds to a device
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registered with the EDAC device driver for the ECS feature.
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/ecs_fruX belongs to the media FRUs (Field Replaceable Unit)
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under the memory device.
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The sysfs ECS attr nodes are only present if the parent
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driver has implemented the corresponding attr callback
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function and provided the necessary operations to the EDAC
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device driver during registration.
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What: /sys/bus/edac/devices/<dev-name>/ecs_fruX/log_entry_type
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) The log entry type of how the DDR5 ECS log is reported.
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- 0 - per DRAM.
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- 1 - per memory media FRU.
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- All other values are reserved.
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What: /sys/bus/edac/devices/<dev-name>/ecs_fruX/mode
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) The mode of how the DDR5 ECS counts the errors.
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Error count is tracked based on two different modes
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selected by DDR5 ECS Control Feature - Codeword mode and
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Row Count mode. If the ECS is under Codeword mode, then
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the error count increments each time a codeword with check
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bit errors is detected. If the ECS is under Row Count mode,
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then the error counter increments each time a row with
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check bit errors is detected.
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- 0 - ECS counts rows in the memory media that have ECC errors.
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- 1 - ECS counts codewords with errors, specifically, it counts
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the number of ECC-detected errors in the memory media.
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- All other values are reserved.
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What: /sys/bus/edac/devices/<dev-name>/ecs_fruX/reset
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(WO) ECS reset ECC counter.
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- 1 - reset ECC counter to the default value.
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- All other values are reserved.
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What: /sys/bus/edac/devices/<dev-name>/ecs_fruX/threshold
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Date: March 2025
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KernelVersion: 6.15
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Contact: linux-edac@vger.kernel.org
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Description:
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(RW) DDR5 ECS threshold count per gigabits of memory cells.
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The ECS error count is subject to the ECS Threshold count
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per Gbit, which masks error counts less than the Threshold.
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Supported values are 256, 1024 and 4096.
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All other values are reserved.
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