linux-kernel - RE: [PATCH v2] scsi: ufs: Allow RTT negotiation

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Date: Mon, 13 May 2024 16:19:45 +0000
From: Avri Altman <Avri.Altman@....com>
To: Peter Wang (王信友) <peter.wang@...iatek.com>,
	"martin.petersen@...cle.com" <martin.petersen@...cle.com>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	CC Chou (周志杰) <cc.chou@...iatek.com>,
	Alice Chao (趙珮均) <Alice.Chao@...iatek.com>,
	"beanhuo@...ron.com" <beanhuo@...ron.com>, "bvanassche@....org"
	<bvanassche@....org>, Tun-yu Yu (游敦聿)
	<Tun-yu.Yu@...iatek.com>, "linux-scsi@...r.kernel.org"
	<linux-scsi@...r.kernel.org>, Chun-Hung Wu (巫駿宏)
	<Chun-hung.Wu@...iatek.com>, Naomi Chu (朱詠田)
	<Naomi.Chu@...iatek.com>, Powen Kao (高伯文)
	<Powen.Kao@...iatek.com>
Subject: RE: [PATCH v2] scsi: ufs: Allow RTT negotiation

> On Mon, 2024-05-13 at 10:38 +0000, Avri Altman wrote:
> >
> > External email : Please do not click links or open attachments until
> > you have verified the sender or the content.
> >  > >
> > > > +     hba->nortt = FIELD_GET(MASK_NUMBER_OUTSTANDING_RTT, hba-
> > > > >capabilities) + 1;
> > > >
> > >
> > > Hi Arvi.
> > >
> > > Get nortt from NUTRS will have problem in mediatek platform.
> > Not sure I follow - nortt has its own slot in the host capabilities -
> > MASK_NUMBER_OUTSTANDING_RTT.
> >
> > Thanks,
> > Avri
> >
> 
> Hi Avri,
> 
> Sorry, NORTTS value still cannot direct use in mediatek platform.
> Hope we can have ops to set real host RTTs.
OK.  Will allow platform vendors to override this default behavior.

Thanks,
Avri

> 
> Thanks.
> Peter
> 
> 
> 
> 
> > > The NUTRS in medatek platfrom is 32 or 64, but actually host rtt
> > support is
> > > only 2.
> > > Please add new vops for host the set real rtt support.
> > >
> > > Thanks.
> > > Peter
> > >
> >
> >