linux-kernel - Re: [PATCH v5 08/11] remoteproc: stm32: Split function stm32_rproc_parse

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Message-ID: <c28c34be-6650-6a07-d7ed-9d6c5e673b0c@st.com>
Date:   Thu, 9 Jul 2020 18:15:07 +0200
From:   Arnaud POULIQUEN <arnaud.pouliquen@...com>
To:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        "ohad@...ery.com" <ohad@...ery.com>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        Loic PALLARDY <loic.pallardy@...com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>
CC:     "linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>
Subject: Re: [PATCH v5 08/11] remoteproc: stm32: Split function
 stm32_rproc_parse_fw()



On 7/7/20 11:31 PM, Mathieu Poirier wrote:
> Split function stm32_rproc_parse_fw() in two parts, the first one
> to parse the memory regions and the second one to load the
> resource table.  That way parsing of the memory regions can be
> re-used when attaching to the remote processor.
> 
> Mainly based on the work published by Arnaud Pouliquen [1].
> 
> [1]. https://patchwork.kernel.org/project/linux-remoteproc/list/?series=239877
> 
> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
> ---
>  drivers/remoteproc/stm32_rproc.c | 23 ++++++++++++++++++++---
>  1 file changed, 20 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/remoteproc/stm32_rproc.c b/drivers/remoteproc/stm32_rproc.c
> index cbeb5ceb15c5..9ab58fae252f 100644
> --- a/drivers/remoteproc/stm32_rproc.c
> +++ b/drivers/remoteproc/stm32_rproc.c
> @@ -213,7 +213,7 @@ static int stm32_rproc_elf_load_rsc_table(struct rproc *rproc,
>  	return 0;
>  }
>  
> -static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
> +static int stm32_rproc_parse_memory_regions(struct rproc *rproc)
>  {
>  	struct device *dev = rproc->dev.parent;
>  	struct device_node *np = dev->of_node;
> @@ -266,6 +266,16 @@ static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
>  		index++;
>  	}
>  
> +	return 0;
> +}
> +
> +static int stm32_rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
> +{
> +	int ret = stm32_rproc_parse_memory_regions(rproc);
> +
> +	if (ret)
> +		return ret;
> +
>  	return stm32_rproc_elf_load_rsc_table(rproc, fw);
>  }
>  
> @@ -693,15 +703,20 @@ static int stm32_rproc_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto free_rproc;
>  
> -	if (state == M4_STATE_CRUN)
> +	if (state == M4_STATE_CRUN) {
>  		rproc->state = RPROC_DETACHED;
>  
> +		ret = stm32_rproc_parse_memory_regions(rproc);
> +		if (ret)
> +			goto free_resources;
> +	}
> +
Here you do more than the split, you add the memory registration in the probe
i think updating the commit title and message should be sufficient

>  	rproc->has_iommu = false;
>  	ddata->workqueue = create_workqueue(dev_name(dev));
>  	if (!ddata->workqueue) {
>  		dev_err(dev, "cannot create workqueue\n");
>  		ret = -ENOMEM;
> -		goto free_rproc;
> +		goto free_resources;
>  	}
>  
>  	platform_set_drvdata(pdev, rproc);
> @@ -720,6 +735,8 @@ static int stm32_rproc_probe(struct platform_device *pdev)
>  	stm32_rproc_free_mbox(rproc);
>  free_wkq:
>  	destroy_workqueue(ddata->workqueue);
> +free_resources:
> +	rproc_resource_cleanup(rproc);
>  free_rproc:
>  	if (device_may_wakeup(dev)) {
>  		dev_pm_clear_wake_irq(dev);
>