From: Daejun Park <daejun7.park@samsung.com>
To: Bean Huo <huobean@gmail.com>,
ALIM AKHTAR <alim.akhtar@samsung.com>,
"avri.altman@wdc.com" <avri.altman@wdc.com>,
"asutoshd@codeaurora.org" <asutoshd@codeaurora.org>,
"jejb@linux.ibm.com" <jejb@linux.ibm.com>,
"martin.petersen@oracle.com" <martin.petersen@oracle.com>,
"stanley.chu@mediatek.com" <stanley.chu@mediatek.com>,
"bvanassche@acm.org" <bvanassche@acm.org>,
"tomas.winkler@intel.com" <tomas.winkler@intel.com>,
"cang@codeaurora.org" <cang@codeaurora.org>,
Daejun Park <daejun7.park@samsung.com>,
"peter.wang@mediatek.com" <peter.wang@mediatek.com>,
"powen.kao@mediatek.com" <powen.kao@mediatek.com>,
Keoseong Park <keosung.park@samsung.com>,
cpgsproxy3 <cpgsproxy3@samsung.com>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v4 5/6] scsi: ufshpb: Add handing of device reset HPB regions Infos in HPB device mode
Date: Tue, 10 May 2022 10:02:55 +0900 [thread overview]
Message-ID: <1889248251.21652147883293.JavaMail.epsvc@epcpadp4> (raw)
In-Reply-To: CGME20220505134735epcas2p457a16df1b023585b188cc6fc15f37932@epcms2p3
Hi Bean Huo,
>In UFS HPB Spec JESD220-3A,
>
>"5.8. Active and inactive information upon power cycle
>...
>When the device is powered off by the host, the device may restore L2P map data
>upon power up or build from the host’s HPB READ command. In case device powered
>up and lost HPB information, device can signal to the host through HPB Sense data,
>by setting HPB Operation as ‘2’ which will inform the host that device reset HPB
>information."
>
>Therefore, for HPB device control mode, if the UFS device is reset via the RST_N
>pin, the active region information in the device will be reset. If the host side
>receives this notification from the device side, it is recommended to inactivate
>all active regions in the host's HPB cache.
>
>Signed-off-by: Bean Huo <beanhuo@micron.com>
>Reviewed-by: Keoseong Park <keosung.park@samsung.com>
Here is my reviewed-by tag.
Reviewed-by: Daejun Park <daejun7.park@samsung.com>
Thanks,
Daejun
next parent reply other threads:[~2022-05-10 1:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20220505134735epcas2p457a16df1b023585b188cc6fc15f37932@epcms2p3>
2022-05-10 1:02 ` Daejun Park [this message]
2022-05-05 13:47 [PATCH v4 0/6] Several changes for UFSHPB Bean Huo
2022-05-05 13:47 ` [PATCH v4 5/6] scsi: ufshpb: Add handing of device reset HPB regions Infos in HPB device mode Bean Huo
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