linux-kernel - RE: [RFC PATCH v1 0/2] UFS Advanced RPMB

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Message-ID: <DM6PR04MB6575F12BAAB0883DA91EFC5DFC3E9@DM6PR04MB6575.namprd04.prod.outlook.com>
Date:   Wed, 9 Nov 2022 08:18:54 +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 0/2] UFS Advanced RPMB

 
> In UFS 4.0, it introduced advanced RPMB, which can significantly improve
> RPMB's command performance, enhancing its atomic operation. We don't
> know which implementation will please everyone, mark this advanced RPMB
> patch as RFC. Any suggestions to make the patch a master patch are welcome.
> 
> Based on suggestions and feedback from Hannes Reinecke and Bart, we can
> use job_bsg->request and job_bsg->reply to pass EHS packets without changing
> the BSG V4 structure and BSG core. So we push RFC patch just to start
> Advanced RPMB mainlining
I concur with this approach.
The current limitations that the new spec imposes,
e.g. putting confidential data in a construct that lives in the ufs-driver,
practically gives no other alternative but ufs-bsg.

If no one else object, maybe you can leave out the rfc from the next version.

Thanks,
Avri

> 
> Bean Huo (2):
>   ufs: core: Advanced RPMB detection
>   ufs: core: Add advanced RPMB support in ufs_bsg
> 
>  drivers/ufs/core/ufs_bsg.c       | 115 +++++++++++++---------
>  drivers/ufs/core/ufshcd.c        | 161 ++++++++++++++++++++++++-------
>  include/uapi/scsi/scsi_bsg_ufs.h |  30 +++++-
>  include/ufs/ufs.h                |   3 +
>  include/ufs/ufshcd.h             |   5 +
>  5 files changed, 233 insertions(+), 81 deletions(-)
> 
> --
> 2.25.1