linux-kernel - Re: [RFC PATCH 2/5] scsi: ufs: Add UFS-feature layer

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Message-ID: <ed36e1de-de0a-f7b0-37a2-cbb30c38d48b@acm.org>
Date:   Wed, 10 Jun 2020 18:39:23 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     daejun7.park@...sung.com, ALIM AKHTAR <alim.akhtar@...sung.com>,
        "avri.altman@....com" <avri.altman@....com>,
        "jejb@...ux.ibm.com" <jejb@...ux.ibm.com>,
        "martin.petersen@...cle.com" <martin.petersen@...cle.com>,
        "asutoshd@...eaurora.org" <asutoshd@...eaurora.org>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "cang@...eaurora.org" <cang@...eaurora.org>,
        "tomas.winkler@...el.com" <tomas.winkler@...el.com>
Cc:     "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Sang-yoon Oh <sangyoon.oh@...sung.com>,
        Sung-Jun Park <sungjun07.park@...sung.com>,
        yongmyung lee <ymhungry.lee@...sung.com>,
        Jinyoung CHOI <j-young.choi@...sung.com>,
        Adel Choi <adel.choi@...sung.com>,
        BoRam Shin <boram.shin@...sung.com>
Subject: Re: [RFC PATCH 2/5] scsi: ufs: Add UFS-feature layer

On 2020-06-04 18:30, Daejun Park wrote:
> This patch is adding UFS feature layer to UFS core driver.
> 
> UFS Driver data structure (struct ufs_hba)
> 	│
> ┌--------------┐
> │ UFS feature  │ <-- HPB module
> │    layer     │ <-- other extended feature module
> └--------------┘
> Each extended UFS-Feature module has a bus of ufs-ext feature type.
> The UFS feature layer manages common APIs used by each extended feature
> module. The APIs are set of UFS Query requests and UFS Vendor commands
> related to each extended feature module.

Personally I'm less than enthusiast that this new feature layer has been
implemented using the driver/bus model. But it seems like nobody else
objects against this model ...

Bart.