linux-kernel - RE: [RFC PATCH v1 1/2] ufs: core: Advanced RPMB detection

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Date:   Tue, 8 Nov 2022 13:40:07 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Bean Huo <beanhuo@...pp.de>,
        "alim.akhtar@...sung.com" <alim.akhtar@...sung.com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "tomas.winkler@...el.com" <tomas.winkler@...el.com>,
        "daejun7.park@...sung.com" <daejun7.park@...sung.com>,
        "quic_cang@...cinc.com" <quic_cang@...cinc.com>,
        "quic_nguyenb@...cinc.com" <quic_nguyenb@...cinc.com>,
        "quic_xiaosenh@...cinc.com" <quic_xiaosenh@...cinc.com>,
        "quic_richardp@...cinc.com" <quic_richardp@...cinc.com>,
        "quic_asutoshd@...cinc.com" <quic_asutoshd@...cinc.com>,
        "hare@...e.de" <hare@...e.de>
CC:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [RFC PATCH v1 1/2] ufs: core: Advanced RPMB detection

> From: Bean Huo <beanhuo@...ron.com>
> 
> Check UFS Advanced RPMB LU enablement during ufshcd_lu_init().
> 
> Signed-off-by: Bean Huo <beanhuo@...ron.com>
> ---
>  drivers/ufs/core/ufshcd.c | 4 ++++
>  include/ufs/ufs.h         | 3 +++
>  2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index
> ee73d7036133..d49e7a0b82ca 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -4940,6 +4940,10 @@ static void ufshcd_lu_init(struct ufs_hba *hba,
> struct scsi_device *sdev)
>             desc_buf[UNIT_DESC_PARAM_LU_WR_PROTECT] ==
> UFS_LU_POWER_ON_WP)
>                 hba->dev_info.is_lu_power_on_wp = true;
> 
> +       if (desc_buf[UNIT_DESC_PARAM_UNIT_INDEX] == UFS_RPMB_UNIT &&
Please remind me why do we need both UFS_RPMB_UNIT and UFS_UPIU_RPMB_WLUN ?

> +           desc_buf[UNIT_DESC_PARAM_RPMB_REGION_EN] & 1 << 4)
(1 << 4) or BIT(4) ?

> +                       hba->dev_info.b_advanced_rpmb_en = true;
> +
>         kfree(desc_buf);
>  set_qdepth:
>         /*
> diff --git a/include/ufs/ufs.h b/include/ufs/ufs.h index
> 1bba3fead2ce..2e617ab87750 100644
> --- a/include/ufs/ufs.h
> +++ b/include/ufs/ufs.h
> @@ -199,6 +199,7 @@ enum unit_desc_param {
>         UNIT_DESC_PARAM_PSA_SENSITIVE           = 0x7,
>         UNIT_DESC_PARAM_MEM_TYPE                = 0x8,
>         UNIT_DESC_PARAM_DATA_RELIABILITY        = 0x9,
> +       UNIT_DESC_PARAM_RPMB_REGION_EN          = 0x9,
This is awkward.  Better to define it, or - 
Maybe it's time for rpmb to have its own unit descriptor - it surely deserve it.
 
Thanks,
Avri

>         UNIT_DESC_PARAM_LOGICAL_BLK_SIZE        = 0xA,
>         UNIT_DESC_PARAM_LOGICAL_BLK_COUNT       = 0xB,
>         UNIT_DESC_PARAM_ERASE_BLK_SIZE          = 0x13,
> @@ -601,6 +602,8 @@ struct ufs_dev_info {
> 
>         bool    b_rpm_dev_flush_capable;
>         u8      b_presrv_uspc_en;
> +
> +       bool    b_advanced_rpmb_en;
>  };
> 
>  /*
> --
> 2.25.1