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SubjectRe: [PATCH v5 12/15] misc: bcm-vk: add sysfs interface
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On 9/30/2020 6:28 PM, Scott Branden wrote:
> Add sysfs support to query the VK card status and monitor sense points.
> The vk-card-status and vk-card-mon details are provided in the README
> file in the bcm-vk driver directory.
>
> Co-developed-by: Desmond Yan <desmond.yan@broadcom.com>
> Signed-off-by: Desmond Yan <desmond.yan@broadcom.com>
> Signed-off-by: Scott Branden <scott.branden@broadcom.com>
> ---

[snip]

> +vk-card-status/
> + bus ---> device PCIe bus
> + card_state ---> summary of current card states
> + chip_id
> + firmware_status ---> summary of all firmware status
> + firmware_version ---> summary of all firmware versions
> + freq_core_mhz ---> running frequency in mHz
> + freq_mem_mhz ---> memory frequency in mHz
> + mem_size_mb ---> memory size in MByte
> + os_state ---> current running state
> + reset_reason ---> last reset reason
> + rev_boot1 ---> boot1 firmware revision
> + rev_boot2 ---> boot2 firmware revision
> + rev_driver ---> host driver revision
> + rev_flash_rom ---> Flash ROM revision
> + sotp_boot1_rev_id ---> minimum boot1 revision required
> + sotp_boot2_rev_id ---> minimum boot2 revision required
> + sotp_dauth_1 ---> authentication key hash
> + sotp_dauth_1_valid ---> authentication key validity
> + sotp_dauth_1_active_status -> authentication key active or not
> + sotp_dauth_2
> + sotp_dauth_2_valid
> + sotp_dauth_2_active_status
> + sotp_dauth_3
> + sotp_dauth_3_valid
> + sotp_dauth_3_active_status
> + sotp_dauth_4
> + sotp_dauth_4_valid
> + sotp_dauth_4_active_status
> + temp_threshold_lower_c ---> thermal low threshold in Celsius
> + temp_threshold_upper_c ---> thermal high threshold in Celsius
> + uptime_s ---> os up time in seconds
> +
> +vk-card-mon/
> + alert_afbc_busy ---> AFBC block stuck
> + alert_ecc ---> uncorrectable ECC error(s) occurred
> + alert_ecc_warn ---> correctable ECC error(s) occurred
> + alert_heartbeat_fail ---> host detects heartbeat discontinuation
> + from card
> + alert_high_temp ---> high temperature threshold crossed
> + alert_intf_ver_fail ---> interface not compatible based on version
> + alert_low_temp_warn ---> low temperature threshold crossed
> + alert_malloc_fail_warn ---> mem allocation failure(s) occurred
> + alert_pcie_down ---> host detect pcie intf going down
> + alert_ssim_busy ---> ssim block busy
> + alert_sys_fault ---> system fault
> + alert_wdog_timeout ---> watchdog timeout

Almost all of these should be supported using the HWMON framework
instead of custom attributes that do not follow the HWMON naming
conventions.

> + firmware_status_reg
> + mem_ecc ---> correctable ECC error count
> + mem_uecc ---> uncorrectable ECC error count

Implementing an EDAC driver would be a bit overkill unless you have a
way to signal ECC errors towards the host?

> + boot_status_reg ---> boot status of card
> + pwr_state ---> power state, 1-full, 2-reduced, 3-lowest
> + temperature_sensor_1_c ---> CPU die temperature in Celsius
> + temperature_sensor_2_c ---> DDR0 temperature in Celsius
> + temperature_sensor_3_c ---> DDR1 temperature in Celsius

Likewise.

> + utilization ---> runtime video transcoding consumption summary
> + utilization_pix ---> percentage of pixel processing used
> + utilization_pix_used ---> pixel processing used
> + utilization_pix_max ---> max pixel processing value which maps 100% load
> + utilization_codec ---> percentage of codec sessions used
> + utilization_codec_used ---> codec sessions currently used
> + utilization_codec_max ---> max codec sessions allowed
> + voltage_18_mv ---> 1.8v voltage rail in mv
> + voltage_33_mv ---> 3.3v voltage rail in mv

Likewise

> +
> +The sysfs entry supports only the read operation.

entries.
--
Florian

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