linux-kernel - Re: UFS utilities

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Date:   Wed, 29 Nov 2017 15:39:19 +0000
From:   "Bean Huo (beanhuo)" <beanhuo@...ron.com>
To:     Greg KH <gregkh@...uxfoundation.org>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "vinholikatti@...il.com" <vinholikatti@...il.com>
Subject: Re: UFS utilities

Hi, Greg

>On Mon, Nov 27, 2017 at 11:25:47AM +0000, Bean Huo (beanhuo) wrote:
>> Hi, all
>> Is there someone knows if exists one utilis dedicated to UFS device, rather
>than SCSI utils?
>> I have tried sg3-utils, but it is not convenient for the embedded ARM-based
>system.
>> And also it doesn't support several UFS special command.
>
>What specific UFS commands do you need to make to the device that the
>current driver does not support?


There are some UFS/vendor native commands. They are not SCSI based.

>And yes, this is a trick question as there are about 4 different major forks that
>I know of of the UFS driver in different vendor trees, all of which support
>different types of UFS commands :(
>
>> If we don't have this kind of tool for UFS, is it necessary for us to develop a
>>ufs-utils?
>
>I doubt it, what neds to happen is getting all of the functionality that lives in
>these different forks all merged upstream into the in-kernel driver.  Then I bet
>all of the needed functionality you are looking for will be there.
>
Sometimes customers tend to use user space tool to do some configuration.
And especially, for example the UFS FFU.

>good luck!
>
Thanks !
>greg k-h

//Bean Huo