From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752346AbcCAH4J (ORCPT ); Tue, 1 Mar 2016 02:56:09 -0500 Received: from mx2.suse.de ([195.135.220.15]:36474 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750820AbcCAH4G (ORCPT ); Tue, 1 Mar 2016 02:56:06 -0500 Subject: Re: [PATCH v5 12/15] scsi: ufs: tune UniPro parameters to optimize hibern8 exit time To: Yaniv Gardi , James.Bottomley@HansenPartnership.com References: <1456666367-11418-1-git-send-email-ygardi@codeaurora.org> <1456666367-11418-13-git-send-email-ygardi@codeaurora.org> Cc: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, linux-arm-msm@vger.kernel.org, santoshsy@gmail.com, linux-scsi-owner@vger.kernel.org, Subhash Jadavani , Vinayak Holikatti , "James E.J. Bottomley" , "Martin K. Petersen" From: Hannes Reinecke Message-ID: <56D54B05.5010103@suse.de> Date: Tue, 1 Mar 2016 15:55:49 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1456666367-11418-13-git-send-email-ygardi@codeaurora.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02/28/2016 09:32 PM, Yaniv Gardi wrote: > Optimal values of local UniPro parameters like PA_Hibern8Time & > PA_TActivate can help reduce the hibern8 exit latency. If both host and > device supports UniPro ver1.6 or later, these parameters will be > automatically tuned during link startup itself. But if either host or > device doesn't support UniPro ver 1.6 or later, we have to manually > tune them. But to keep manual tuning logic simple, we will only do > manual tuning if local unipro version doesn't support ver1.6 or later. > > Signed-off-by: Subhash Jadavani > Signed-off-by: Yaniv Gardi > > --- > drivers/scsi/ufs/ufshcd.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++ > drivers/scsi/ufs/ufshcd.h | 1 + > drivers/scsi/ufs/ufshci.h | 2 + > drivers/scsi/ufs/unipro.h | 21 +++++++++ > 4 files changed, 142 insertions(+) > Reviewed-by: Hannes Reinecke Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)