linux-kernel - RE: [PATCH 1/2] scsi: ufs: Add Multi-Circular Queue support

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Message-ID: <DM6PR04MB657540D8D6584C15C8701767FC929@DM6PR04MB6575.namprd04.prod.outlook.com>
Date:   Sun, 24 Jul 2022 04:32:11 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Can Guo <quic_cang@...cinc.com>,
        "bvanassche@....org" <bvanassche@....org>,
        "stanley.chu@...iatek.com" <stanley.chu@...iatek.com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "alim.akhtar@...sung.com" <alim.akhtar@...sung.com>,
        "beanhuo@...ron.com" <beanhuo@...ron.com>,
        "quic_asutoshd@...cinc.com" <quic_asutoshd@...cinc.com>,
        "quic_nguyenb@...cinc.com" <quic_nguyenb@...cinc.com>,
        "quic_ziqichen@...cinc.com" <quic_ziqichen@...cinc.com>,
        "linux-scsi@...r.kernel.org" <linux-scsi@...r.kernel.org>,
        "kernel-team@...roid.com" <kernel-team@...roid.com>
CC:     "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Daejun Park <daejun7.park@...sung.com>,
        Jinyoung Choi <j-young.choi@...sung.com>,
        Kiwoong Kim <kwmad.kim@...sung.com>,
        open list <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/2] scsi: ufs: Add Multi-Circular Queue support

> +
> +/**
> + * @ucdl_base_addr: UFS Command Descriptor base address
> + * @sqe_base_addr: submission queue entry base address
> + * @sqe_shadow_addr: submission queue entry shadow address
When you are editing your commit log, could you please also say something about the shadow queues concept?
And why it is a good idea to maintain 2 sets of addresses, which basically points to the same place?

Thanks,
Avri