linux-kernel - Re: [PATCH v5 19/28] fpga: dfl: fme-mgr: add compat

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Date:   Mon, 7 May 2018 16:12:17 -0500
From:   Alan Tull <atull@...nel.org>
To:     Wu Hao <hao.wu@...el.com>
Cc:     Moritz Fischer <mdf@...nel.org>, linux-fpga@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-api@...r.kernel.org, "Kang, Luwei" <luwei.kang@...el.com>,
        "Zhang, Yi Z" <yi.z.zhang@...el.com>
Subject: Re: [PATCH v5 19/28] fpga: dfl: fme-mgr: add compat_id support

On Tue, May 1, 2018 at 9:50 PM, Wu Hao <hao.wu@...el.com> wrote:

Hi Hao,

> This patch adds compat_id support to fme manager driver, it
> reads the ID from the hardware register. And it could be used
> for compatibility check before partial reconfiguration.
>
> Signed-off-by: Wu Hao <hao.wu@...el.com>
Acked-by: Alan Tull <atull@...nel.org>

> ---
>  drivers/fpga/dfl-fme-mgr.c | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/drivers/fpga/dfl-fme-mgr.c b/drivers/fpga/dfl-fme-mgr.c
> index 1c5bc5a..afcdb39 100644
> --- a/drivers/fpga/dfl-fme-mgr.c
> +++ b/drivers/fpga/dfl-fme-mgr.c
> @@ -272,9 +272,17 @@ static u64 fme_mgr_status(struct fpga_manager *mgr)
>         .status = fme_mgr_status,
>  };
>
> +static void fme_mgr_get_compat_id(void __iomem *fme_pr,
> +                                 struct fpga_compat_id *id)
> +{
> +       id->id_l = readq(fme_pr + FME_PR_INTFC_ID_L);
> +       id->id_h = readq(fme_pr + FME_PR_INTFC_ID_H);
> +}
> +
>  static int fme_mgr_probe(struct platform_device *pdev)
>  {
>         struct dfl_fme_mgr_pdata *pdata = dev_get_platdata(&pdev->dev);
> +       struct fpga_compat_id *compat_id;
>         struct device *dev = &pdev->dev;
>         struct fme_mgr_priv *priv;
>         struct fpga_manager *mgr;
> @@ -295,11 +303,18 @@ static int fme_mgr_probe(struct platform_device *pdev)
>                         return PTR_ERR(priv->ioaddr);
>         }
>
> +       compat_id = devm_kzalloc(dev, sizeof(*compat_id), GFP_KERNEL);
> +       if (!compat_id)
> +               return -ENOMEM;
> +
> +       fme_mgr_get_compat_id(priv->ioaddr, compat_id);
> +
>         mgr = fpga_mgr_create(dev, "DFL FME FPGA Manager",
>                               &fme_mgr_ops, priv);
>         if (!mgr)
>                 return -ENOMEM;
>
> +       mgr->compat_id = compat_id;
>         platform_set_drvdata(pdev, mgr);
>
>         ret = fpga_mgr_register(mgr);
> --
> 1.8.3.1
>