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Date: Sun, 30 Mar 2025 12:13:54 +0000
From: Arthur Simchaev <Arthur.Simchaev@...disk.com>
To: "Bao D. Nguyen" <quic_nguyenb@...cinc.com>, "quic_cang@...cinc.com"
<quic_cang@...cinc.com>, "bvanassche@....org" <bvanassche@....org>,
"avri.altman@....com" <avri.altman@....com>, "peter.wang@...iatek.com"
<peter.wang@...iatek.com>, "manivannan.sadhasivam@...aro.org"
<manivannan.sadhasivam@...aro.org>, "minwoo.im@...sung.com"
<minwoo.im@...sung.com>, "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
"martin.petersen@...cle.com" <martin.petersen@...cle.com>
CC: "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>, Alim Akhtar
<alim.akhtar@...sung.com>, "James E.J. Bottomley"
<James.Bottomley@...senPartnership.com>, Matthias Brugger
<matthias.bgg@...il.com>, AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>, Bean Huo <beanhuo@...ron.com>,
Keoseong Park <keosung.park@...sung.com>, Ziqi Chen
<quic_ziqichen@...cinc.com>, Gwendal Grignou <gwendal@...omium.org>, Al Viro
<viro@...iv.linux.org.uk>, Eric Biggers <ebiggers@...gle.com>, open list
<linux-kernel@...r.kernel.org>, "moderated list:ARM/Mediatek SoC
support:Keyword:mediatek" <linux-arm-kernel@...ts.infradead.org>, "moderated
list:ARM/Mediatek SoC support:Keyword:mediatek"
<linux-mediatek@...ts.infradead.org>
Subject: RE: [PATCH v5 1/1] scsi: ufs: core: add device level exception
support
> Subject: [PATCH v5 1/1] scsi: ufs: core: add device level exception support
>
> The ufs device JEDEC specification version 4.1 adds support for the device level
> exception events. To support this new device level exception feature, expose
> two new sysfs nodes below to provide the user space access to the device level
> exception information.
> /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_count
> /sys/bus/platform/drivers/ufshcd/*/device_lvl_exception_id
>
> The device_lvl_exception_count sysfs node reports the number of device level
> exceptions that have occurred since the last time this variable is reset. Writing
> a value of 0 will reset it.
> The device_lvl_exception_id reports the exception ID which is the
> qDeviceLevelExceptionID attribute of the device JEDEC specifications version
> 4.1 and later. The user space application can query these sysfs nodes to get
> more information about the device level exception.
>
> Signed-off-by: Bao D. Nguyen <quic_nguyenb@...cinc.com>
> Reviewed-by: Peter Wang <peter.wang@...iatek.com>
> Reviewed-by: Bart Van Assche <bvanassche@....org>
Reviewed-by: Arthur Simchaev <arthur.simchaev@...disk.com>
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