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Subject: Re: [PATCH V5] firmware: arm_scmi: Make scmi core independent of the
 transport type
To:     Sudeep Holla <sudeep.holla@arm.com>,
        Viresh Kumar <viresh.kumar@linaro.org>
CC:     <arnd@arndb.de>, <jassisinghbrar@gmail.com>,
        <cristian.marussi@arm.com>, <peng.fan@nxp.com>,
        Vincent Guittot <vincent.guittot@linaro.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>
References: <f170b33989b426ac095952634fcd1bf45b86a7a3.1580208329.git.viresh.kumar@linaro.org>
 <20200128173524.GB36496@bogus>
From:   Peter Hilber <peter.hilber@opensynergy.com>
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Message-ID: <b970542b-0c05-5401-46be-5f585bdafb09@opensynergy.com>
Date:   Thu, 30 Jan 2020 12:58:08 +0100
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On 28.01.20 18:35, Sudeep Holla wrote:
> Otherwise looks good. Since we are not adding module support, I am fine
> even if we have to make changes to transport ops bit later if required
> and realised when adding new transport. Let us see if Peter has any major
> objections.

I have no objections. Looks good. One remark:

> +struct scmi_transport_ops {
> +     bool (*chan_available)(struct device *dev, int idx);
> +     int (*chan_setup)(struct scmi_chan_info *cinfo, struct device *dev, bool tx);
> +     int (*chan_free)(int id, void *p, void *data);
> +     int (*send_message)(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer);
> +     void (*mark_txdone)(struct scmi_chan_info *cinfo, int ret);
> +     void (*fetch_response)(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer);
> +     bool (*poll_done)(struct scmi_chan_info *cinfo, struct scmi_xfer *xfer);
> +};

Maybe the mark_txdone, fetch_response, and poll_done ops should also get
a `u32 msg_hdr' parameter? I thought it could be required in case of
concurrent xfers, or maybe I don't understand the imposed concurrency
limitations properly.

Best regards,

Peter

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