linux-kernel - RE: [PATCH v2 6/6] ufs: core: Add advanced RPMB support in ufs

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Message-ID: <DM6PR04MB6575750D9C6F84FC3BE06AFBFC0D9@DM6PR04MB6575.namprd04.prod.outlook.com>
Date:   Tue, 22 Nov 2022 11:55:27 +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 6/6] ufs: core: Add advanced RPMB support in ufs_bsg

> +static int ufs_bsg_exec_advanced_rpmb_req(struct ufs_hba *hba, struct
> +bsg_job *job) {
> +       struct ufs_rpmb_request *rpmb_request = job->request;
> +       struct ufs_rpmb_reply *rpmb_reply = job->reply;
> +       struct bsg_buffer *payload = NULL;
> +       enum dma_data_direction dir;
> +       struct scatterlist *sg_list;
> +       int rpmb_req_type;
> +       int sg_cnt;
> +       int ret;
> +       int data_len;
> +
> +       if (hba->ufs_version < ufshci_version(4, 0) || !hba-
> >dev_info.b_advanced_rpmb_en ||
> +           !(hba->capabilities & MASK_EHSLUTRD_SUPPORTED))
> +               return -EINVAL;
> +
> +       if (rpmb_request->ehs_req.length != 2 || rpmb_request-
> >ehs_req.ehs_type != 1)
> +               return -EINVAL;
Maybe you could also check:
In case of rpmb write, the request payload 4096 × Advanced RPMB Block Count,
And same goes for response payload for rpmb read.

Thanks,
Avri