From: Bean Huo <huobean@gmail.com>
To: Chanho Park <chanho61.park@samsung.com>,
'Krzysztof Kozlowski' <krzk@kernel.org>,
'Alim Akhtar' <alim.akhtar@samsung.com>,
"'James E . J . Bottomley'" <jejb@linux.ibm.com>,
"'Martin K . Petersen'" <martin.petersen@oracle.com>
Cc: 'Can Guo' <cang@codeaurora.org>,
'Jaegeuk Kim' <jaegeuk@kernel.org>,
'Kiwoong Kim' <kwmad.kim@samsung.com>,
'Avri Altman' <avri.altman@wdc.com>,
'Adrian Hunter' <adrian.hunter@intel.com>,
'Christoph Hellwig' <hch@infradead.org>,
'Bart Van Assche' <bvanassche@acm.org>,
'jongmin jeong' <jjmin.jeong@samsung.com>,
'Gyunghoon Kwon' <goodjob.kwon@samsung.com>,
linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org
Subject: Re: [PATCH v2 14/15] scsi: ufs: ufs-exynos: multi-host configuration for exynosauto
Date: Thu, 29 Jul 2021 23:10:58 +0200 [thread overview]
Message-ID: <27287a3c10d6096bd050f1f743c218b825dde2b9.camel@gmail.com> (raw)
In-Reply-To: <002e01d78351$6996d040$3cc470c0$@samsung.com>
On Wed, 2021-07-28 at 10:39 +0900, Chanho Park wrote:
> > Hi Chanho Park,
> > Thansk for yoru reply.
> > I didn't see your changes about task_tag and IID. Having a look at
> > ufshcd_prepare_utp_scsi_cmd_upiu(), the task tag in the UPIU header
> > is
> > still only task tag. and IID is always 0x00.
> > If you didn't add these changes, your patch is un-readable, and
> > also the
> > driver doesn't have a real usage case.
>
>
> I already replied regarding this in another mail thread and please
> refer below comments. The controller will handle the tag translation.
>
> https://lore.kernel.org/linux-scsi/002901d782c6$937ac0f0$ba7042d0$@samsung.com/
>
>
>
> > Also, you mentioned there is no support/change needed from the UFS
> > device
> > side. But, IMO, if you changed the UPIU header, there are changes
> > needed
> > on the UFS device side in order to use your driver.
>
>
> Please see the figure[1]. Once IID_IN_TASKTAG bit is set, the
> function arbiter will translate the value of UPIU header before
> delivering it to the device.
>
>
>
> [1]:
> https://lore.kernel.org/linux-scsi/20210714071131.101204-1-chanho61.park@samsung.com/
>
>
>
> Best Regards,
>
> Chanho Park
Hi Chanho Park,
thansk for your further reply. I didn't find out your cover-letter in
your patchset before.
IID will be automatically set by HW controller according to the VH_ID
in the tasg_tag byte[7:5]. Before sending this RPMB to UFS device,
doese your controller reset task_tag byte[7:5] to 0x0 or your
controller will keep VH_ID?
one more question, you mentioned para-virtualization, did you use Xen
or KVM?
Kind regards,
Bean
next prev parent reply other threads:[~2021-07-29 21:11 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210714071158epcas2p1a7b98fd67b9bcaaa634e59fc224761b1@epcas2p1.samsung.com>
2021-07-14 7:11 ` [PATCH v2 00/15] introduce exynosauto v9 ufs driver Chanho Park
[not found] ` <CGME20210714071158epcas2p261e6c9157056fafca0f55aaf05cd68ef@epcas2p2.samsung.com>
2021-07-14 7:11 ` [PATCH v2 01/15] scsi: ufs: add quirk to handle broken UIC command Chanho Park
[not found] ` <CGME20210714071158epcas2p29900b577a489b760a1e67eba976fb815@epcas2p2.samsung.com>
2021-07-14 7:11 ` [PATCH v2 02/15] scsi: ufs: add quirk to enable host controller without ph configuration Chanho Park
[not found] ` <CGME20210714071159epcas2p36dc12e150a84ef4fa2516bc98169725b@epcas2p3.samsung.com>
2021-07-14 7:11 ` [PATCH v2 03/15] scsi: ufs: ufs-exynos: change pclk available max value Chanho Park
[not found] ` <CGME20210714071159epcas2p3fa23ac2a670e1c31deeac1c9332f76fe@epcas2p3.samsung.com>
2021-07-14 7:11 ` [PATCH v2 04/15] scsi: ufs: ufs-exynos: simplify drv_data retrieval Chanho Park
[not found] ` <CGME20210714071159epcas2p2ae981fb3b91b0eba23060de5de104ec0@epcas2p2.samsung.com>
2021-07-14 7:11 ` [PATCH v2 05/15] scsi: ufs: ufs-exynos: get sysreg regmap for io-coherency Chanho Park
[not found] ` <CGME20210714071159epcas2p3d39f7e5cbd9a2b8addaa496a396213af@epcas2p3.samsung.com>
2021-07-14 7:11 ` [PATCH v2 06/15] scsi: ufs: ufs-exynos: add refclkout_stop control Chanho Park
[not found] ` <CGME20210714071159epcas2p4c4eabf50abdaa46567fc5356bce8942b@epcas2p4.samsung.com>
2021-07-14 7:11 ` [PATCH v2 07/15] scsi: ufs: ufs-exynos: add setup_clocks callback Chanho Park
[not found] ` <CGME20210714071159epcas2p24b7be0cad31af09bc71c608f9b03fe36@epcas2p2.samsung.com>
2021-07-14 7:11 ` [PATCH v2 08/15] scsi: ufs: ufs-exynos: correct timeout value setting registers Chanho Park
[not found] ` <CGME20210714071159epcas2p4edc8104aad36d4d7a5bedb8328c0ab39@epcas2p4.samsung.com>
2021-07-14 7:11 ` [PATCH v2 09/15] scsi: ufs: ufs-exynos: support custom version of ufs_hba_variant_ops Chanho Park
[not found] ` <CGME20210714071159epcas2p24323976939fa21a5ed44d81649b33d85@epcas2p2.samsung.com>
2021-07-14 7:11 ` [PATCH v2 10/15] scsi: ufs: ufs-exynos: add EXYNOS_UFS_OPT_SKIP_CONFIG_PHY_ATTR option Chanho Park
[not found] ` <CGME20210714071159epcas2p176be9a1310f8de27cfb3786fe86630d6@epcas2p1.samsung.com>
2021-07-14 7:11 ` [PATCH v2 11/15] scsi: ufs: ufs-exynos: factor out priv data init Chanho Park
[not found] ` <CGME20210714071159epcas2p428292c7d0e97533de65d92a029eece93@epcas2p4.samsung.com>
2021-07-14 7:11 ` [PATCH v2 12/15] scsi: ufs: ufs-exynos: add pre/post_hce_enable drv callbacks Chanho Park
[not found] ` <CGME20210714071200epcas2p199f4f7b209e565c9a87440af319acda1@epcas2p1.samsung.com>
2021-07-14 7:11 ` [PATCH v2 13/15] scsi: ufs: ufs-exynos: support exynosauto v9 ufs driver Chanho Park
[not found] ` <CGME20210714071200epcas2p3f76e68f6bbb4755574dba2055a8130ab@epcas2p3.samsung.com>
2021-07-14 7:11 ` [PATCH v2 14/15] scsi: ufs: ufs-exynos: multi-host configuration for exynosauto Chanho Park
2021-07-26 9:08 ` Bean Huo
2021-07-26 10:40 ` Chanho Park
2021-07-26 21:58 ` Bean Huo
2021-07-27 10:14 ` Chanho Park
2021-07-27 19:36 ` Bean Huo
2021-07-28 1:39 ` Chanho Park
2021-07-29 21:10 ` Bean Huo [this message]
2021-07-26 22:06 ` Bean Huo
2021-07-27 9:05 ` Chanho Park
[not found] ` <CGME20210714071200epcas2p413ca643dc459ee75ec7e5e4f8a6c05d7@epcas2p4.samsung.com>
2021-07-14 7:11 ` [PATCH v2 15/15] scsi: ufs: ufs-exynos: introduce exynosauto v9 virtual host Chanho Park
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