Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Message-ID: <35eb780d-93cf-be2c-deb5-239fad5f3abf@quicinc.com>
Date:   Tue, 26 Jul 2022 14:35:08 +0800
MIME-Version: 1.0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101
 Thunderbird/91.8.0
Subject: Re: [PATCH 1/2] scsi: ufs: Add Multi-Circular Queue support
Content-Language: en-US
To:     Avri Altman <Avri.Altman@wdc.com>,
        "bvanassche@acm.org" <bvanassche@acm.org>,
        "stanley.chu@mediatek.com" <stanley.chu@mediatek.com>,
        "adrian.hunter@intel.com" <adrian.hunter@intel.com>,
        "alim.akhtar@samsung.com" <alim.akhtar@samsung.com>,
        "beanhuo@micron.com" <beanhuo@micron.com>,
        "quic_asutoshd@quicinc.com" <quic_asutoshd@quicinc.com>,
        "quic_nguyenb@quicinc.com" <quic_nguyenb@quicinc.com>,
        "quic_ziqichen@quicinc.com" <quic_ziqichen@quicinc.com>,
        "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
        "kernel-team@android.com" <kernel-team@android.com>
CC:     "James E.J. Bottomley" <jejb@linux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@oracle.com>,
        Daejun Park <daejun7.park@samsung.com>,
        Jinyoung Choi <j-young.choi@samsung.com>,
        Kiwoong Kim <kwmad.kim@samsung.com>,
        open list <linux-kernel@vger.kernel.org>
References: <1658214120-22772-1-git-send-email-quic_cang@quicinc.com>
 <1658214120-22772-2-git-send-email-quic_cang@quicinc.com>
 <DM6PR04MB65757CEC7F66AB732EF5FC48FC929@DM6PR04MB6575.namprd04.prod.outlook.com>
From:   Can Guo <quic_cang@quicinc.com>
In-Reply-To: <DM6PR04MB65757CEC7F66AB732EF5FC48FC929@DM6PR04MB6575.namprd04.prod.outlook.com>
Content-Type: text/plain; charset="UTF-8"; format=flowed
Content-Transfer-Encoding: 7bit
Precedence: bulk

Hi Avri,

On 7/24/2022 12:07 PM, Avri Altman wrote:
>> @@ -2558,7 +2587,8 @@ void ufshcd_prepare_utp_scsi_cmd_upiu(struct
>> ufshcd_lrb *lrbp, u8 upiu_flags)
>>                                  UPIU_TRANSACTION_COMMAND, upiu_flags,
>>                                  lrbp->lun, lrbp->task_tag);
>>          ucd_req_ptr->header.dword_1 = UPIU_HEADER_DWORD(
>> -                               UPIU_COMMAND_SET_TYPE_SCSI, 0, 0, 0);
>> +                               UPIU_COMMAND_SET_TYPE_SCSI |
>> +                               (lrbp->hw_queue_id << 4), 0, 0, 0);
> This is fine, as long as we have 16 queues or less.
> Otherwise, we need to fill the EXT_IID as well (only if bEXTIIDEn = 1).
>
> Also, don't we need to do this for query commands as well?
> Or at least add a comment that the queue id for query command is 0.

As per UFS4.0 JEDEC draft, EXT_IID or IID is not required in QUERY 
REQUEST/RESPONSE UPIU,

unless my doc is out dated, please let me know.


Thanks,

Can Guo.

>
> Thanks,
> Avri