linux-kernel - RE: [PATCH v32 4/4] scsi: ufs: Add HPB 2.0 support

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Message-ID: <DM6PR04MB657548321E9521F76BF2436EFC4E9@DM6PR04MB6575.namprd04.prod.outlook.com>
Date:   Wed, 14 Apr 2021 09:06:11 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     "daejun7.park@...sung.com" <daejun7.park@...sung.com>,
        Greg KH <gregkh@...uxfoundation.org>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "bvanassche@....org" <bvanassche@....org>,
        "huobean@...il.com" <huobean@...il.com>,
        ALIM AKHTAR <alim.akhtar@...sung.com>
CC:     "hanjinyi@...com" <hanjinyi@...com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        JinHwan Park <jh.i.park@...sung.com>,
        Javier Gonzalez <javier.gonz@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        Dukhyun Kwon <d_hyun.kwon@...sung.com>,
        Keoseong Park <keosung.park@...sung.com>,
        Jaemyung Lee <jaemyung.lee@...sung.com>,
        Jieon Seol <jieon.seol@...sung.com>
Subject: RE: [PATCH v32 4/4] scsi: ufs: Add HPB 2.0 support

> From: Daejun Park <daejun7.park@...sung.com>
> 
> @@ -1692,6 +2188,7 @@ static void ufshpb_hpb_lu_prepared(struct ufs_hba
> *hba)
>                         ufshpb_set_state(hpb, HPB_PRESENT);
>                         if ((hpb->lu_pinned_end - hpb->lu_pinned_start) > 0)
>                                 queue_work(ufshpb_wq, &hpb->map_work);
> +                       ufshpb_issue_umap_all_req(hpb);
> HPB-WRITE-BUFFER with buffer-id = 0x3h is supported in device control mode
> only
> so I think it is necessary to distinguish device mode and host mode.
You are correct.
Since Daejun's driver's scope is device mode only - see ufshpb_get_dev_info,
This needs to be fixed in the host mode series.
I will fix it in my next version.

Thanks,
Avri

>                 } else {
>                         dev_err(hba->dev, "destroy HPB lu %d\n", hpb->lun);
>                         ufshpb_destroy_lu(hba, sdev);
>