linux-kernel - RE: [PATCH v2 4/6] ufs: core: Advanced RPMB detection

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Date:   Tue, 22 Nov 2022 09:11:22 +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: [PATCH v2 4/6] 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 |  6 ++++++
>  include/ufs/ufs.h         | 24 ++++++++++++++++++++++++
>  2 files changed, 30 insertions(+)
> 
> diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c index
> 1b252e6cf93f..311172578fd8 100644
> --- a/drivers/ufs/core/ufshcd.c
> +++ b/drivers/ufs/core/ufshcd.c
> @@ -4956,6 +4956,12 @@ 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;
> 
> +       /* In case of RPMB LU, check if advanced RPMB mode is enabled */
> +       if (desc_buf[UNIT_DESC_PARAM_UNIT_INDEX] ==
> UFS_UPIU_RPMB_WLUN &&
> +           desc_buf[RPMB_UNIT_DESC_PARAM_REGION_EN] & BIT(4))
If instead you use bit 10 in dExtendedUFSFeaturesSupport,
You wouldn't need to add the rpmb unit descriptor, just the appropriate bit.

Thanks,
Avri