Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Message-ID: <88dc0251ee98aee5af2217f5d864f0a893dbdef8.camel@gmail.com>
Subject: Re: [PATCH v1 3/3] scsi: ufs: Utilize Transfer Request List
 Completion Notification Register
From:   Bean Huo <huobean@gmail.com>
To:     Can Guo <cang@codeaurora.org>, asutoshd@codeaurora.org,
        nguyenb@codeaurora.org, hongwus@codeaurora.org,
        linux-scsi@vger.kernel.org, kernel-team@android.com
Cc:     Stanley Chu <stanley.chu@mediatek.com>,
        Alim Akhtar <alim.akhtar@samsung.com>,
        Avri Altman <avri.altman@wdc.com>,
        "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Bean Huo <beanhuo@micron.com>,
        Jaegeuk Kim <jaegeuk@kernel.org>,
        Adrian Hunter <adrian.hunter@intel.com>,
        Kiwoong Kim <kwmad.kim@samsung.com>,
        Satya Tangirala <satyat@google.com>,
        "Gustavo A. R. Silva" <gustavoars@kernel.org>,
        Caleb Connolly <caleb@connolly.tech>,
        open list <linux-kernel@vger.kernel.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@lists.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@lists.infradead.org>
Date:   Mon, 31 May 2021 18:05:24 +0200
In-Reply-To: <1621845419-14194-4-git-send-email-cang@codeaurora.org>
References: <1621845419-14194-1-git-send-email-cang@codeaurora.org>
         <1621845419-14194-4-git-send-email-cang@codeaurora.org>
Content-Type: text/plain; charset="UTF-8"
User-Agent: Evolution 3.36.4-0ubuntu1 
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Precedence: bulk

On Mon, 2021-05-24 at 01:36 -0700, Can Guo wrote:
> By reading the UTP Transfer Request List Completion Notification
> Register,
> 
> which is added in UFSHCI Ver 3.0, SW can easily get the compeleted
> transfer
> 
> requests. Thus, SW can get rid of host lock, which is used to
> synchronize
> 
> the tr_doorbell and outstanding_reqs, on transfer requests dispatch
> and
> 
> completion paths. This can further benefit random read/write
> performance.
> 
> 
> 
> Cc: Stanley Chu <stanley.chu@mediatek.com>
> 
> Co-developed-by: Asutosh Das <asutoshd@codeaurora.org>
> 
> Signed-off-by: Asutosh Das <asutoshd@codeaurora.org>
> 
> Signed-off-by: Can Guo <cang@codeaurora.org>

Reviewed-by: Bean Huo <beanhuo@micron.com>