From: Kiwoong Kim <kwmad.kim@samsung.com>
To: 'Shaun Tancheff' <shaun.tancheff@seagate.com>,
'Joao Pinto' <Joao.Pinto@synopsys.com>
Cc: linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: RE: UFS API in the kernel
Date: Tue, 27 Sep 2016 10:10:51 +0900 [thread overview]
Message-ID: <009f01d2185b$fcf71ef0$f6e55cd0$@samsung.com> (raw)
In-Reply-To: <CAJVOszALc04xgNujHi2YdCGpTXNWDoyLVwYT2uSYy6faDLqmYA@mail.gmail.com>
Hi.
If you want to declare some things for user interface,
is it be better to put those thing include/uapi/linux/ than include/linux?
Agreed with Mr. Pinto's opinion with respect to implementing additional ioctls.
Regards.
> -----Original Message-----
> From: linux-scsi-owner@vger.kernel.org [mailto:linux-scsi-
> owner@vger.kernel.org] On Behalf Of Shaun Tancheff
> Sent: Tuesday, September 27, 2016 4:23 AM
> To: Joao Pinto
> Cc: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
> Subject: Re: UFS API in the kernel
>
> On Thu, Sep 22, 2016 at 10:21 AM, Joao Pinto <Joao.Pinto@synopsys.com>
> wrote:
> > Hi!
> >
> > I am designing an application that has the goal to be an utility for
> > Unipro and UFS testing purposes. This application is going to run on
> > top of a recent Linux Kernel containing the new UFS stack (including the
> new DWC drivers).
> >
> > I am considering doing the following:
> > a) Create a new config item called CONFIG_UFS_CHARDEV which is going
> > to create a char device responsible to make some IOCTL available for
> > user-space applications
> > b) Create a linux/ufs.h header file that contains data structures
> > declarations that will be needed in user-space applications
>
> I am not very familiar with UFS devices, that said you should have an sgX
> chardev being created already so you can handle SG_IO requests.
> There also appear to be some sysfs entries being created.
>
> So between sg and sysfs you should be able to handle any user-space out of
> band requests without resorting to making a new chardev.
>
> Adding more sysfs entries, if you need them, should be fine.
>
> You may find it easier to expand on the existing interfaces than to get
> consensus on a new driver and ioctls.
>
> Hope this helps,
> Shaun
>
> > Could you please advise me about what the correct approach should be
> > to make it as standard as possible and usable in the future?
> >
> > Thank you very much for your help!
> >
> > regards,
> > Joao
> > --
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> > https://urldefense.proofpoint.com/v2/url?u=http-3A__vger.kernel.org_ma
> > jordomo-2Dinfo.html&d=DQICaQ&c=IGDlg0lD0b-nebmJJ0Kp8A&r=Wg5NqlNlVTT7Ug
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> > u88nM&s=yiQLPFpqmMrbqLZz1Jb3aNqOje2dRMLJHEzUDobwcXc&e=
>
>
>
> --
> Shaun Tancheff
> --
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next prev parent reply other threads:[~2016-09-27 1:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-22 15:21 UFS API in the kernel Joao Pinto
2016-09-26 19:22 ` Shaun Tancheff
2016-09-27 1:10 ` Kiwoong Kim [this message]
2016-09-27 23:05 ` subhashj
2016-09-28 9:06 ` Joao Pinto
2016-09-28 9:19 ` Joao Pinto
2016-09-28 9:57 ` Joao Pinto
2016-09-28 22:46 ` subhashj
2016-09-28 23:04 ` subhashj
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