Re: [PATCH v5 06/12] remoteproc: mediatek: Extract remoteproc initialization flow

[AngeloGioacchino Del Regno]

Il 10/02/23 09:59, Tinghan Shen ha scritto:
> This is the preparation for probing multi-core SCP. The remoteproc
> initialization flow is similar on cores and is reuesd to avoid
> redundant code.
>
> The registers of config and l1tcm are shared for multi-core
> SCP. Reuse the mapped addresses for all cores.
>
> Signed-off-by: Tinghan Shen <tinghan.shen@xxxxxxxxxxxx>
> ---
>   drivers/remoteproc/mtk_common.h |  7 +++++
>   drivers/remoteproc/mtk_scp.c    | 55 +++++++++++++++++++++------------
>   2 files changed, 42 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> index 3778894c96f3..20c1a90be77d 100644
> --- a/drivers/remoteproc/mtk_common.h
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -112,6 +112,13 @@ struct mtk_scp_of_data {
>   	size_t ipi_buf_offset;
>   };
>   
> +struct mtk_scp_of_regs {

In v4, I already commented on this one, saying that this structure is used
only in mtk_scp.c as a commodity and *only* as a commodity for passing data
between two functions, and I already asked to move this structure definition
to mtk_scp.c.

Thanks,
Angelo

> +	void __iomem *reg_base;
> +	void __iomem *l1tcm_base;
> +	size_t l1tcm_size;
> +	phys_addr_t l1tcm_phys;
> +};
> +
>   struct mtk_scp {
>   	struct device *dev;
>   	struct rproc *rproc;
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index b92274067522..898039879142 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -854,7 +854,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
>   	}
>   }
>   
> -static int scp_probe(struct platform_device *pdev)
> +static int scp_rproc_init(struct platform_device *pdev,
> +			  struct mtk_scp_of_regs *of_regs)
>   {
>   	struct device *dev = &pdev->dev;
>   	struct device_node *np = dev->of_node;
> @@ -878,6 +879,11 @@ static int scp_probe(struct platform_device *pdev)
>   	scp->data = of_device_get_match_data(dev);
>   	platform_set_drvdata(pdev, scp);
>   
> +	scp->reg_base = of_regs->reg_base;
> +	scp->l1tcm_base = of_regs->l1tcm_base;
> +	scp->l1tcm_size = of_regs->l1tcm_size;
> +	scp->l1tcm_phys = of_regs->l1tcm_phys;
> +
>   	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
>   	scp->sram_base = devm_ioremap_resource(dev, res);
>   	if (IS_ERR(scp->sram_base))
> @@ -887,24 +893,6 @@ static int scp_probe(struct platform_device *pdev)
>   	scp->sram_size = resource_size(res);
>   	scp->sram_phys = res->start;
>   
> -	/* l1tcm is an optional memory region */
> -	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
> -	scp->l1tcm_base = devm_ioremap_resource(dev, res);
> -	if (IS_ERR(scp->l1tcm_base)) {
> -		ret = PTR_ERR(scp->l1tcm_base);
> -		if (ret != -EINVAL) {
> -			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
> -		}
> -	} else {
> -		scp->l1tcm_size = resource_size(res);
> -		scp->l1tcm_phys = res->start;
> -	}
> -
> -	scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
> -	if (IS_ERR(scp->reg_base))
> -		return dev_err_probe(dev, PTR_ERR(scp->reg_base),
> -				     "Failed to parse and map cfg memory\n");
> -
>   	ret = scp->data->scp_clk_get(scp);
>   	if (ret)
>   		return ret;
> @@ -932,7 +920,6 @@ static int scp_probe(struct platform_device *pdev)
>   	ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL,
>   					scp_irq_handler, IRQF_ONESHOT,
>   					pdev->name, scp);
> -
>   	if (ret) {
>   		dev_err(dev, "failed to request irq\n");
>   		goto remove_subdev;
> @@ -956,6 +943,34 @@ static int scp_probe(struct platform_device *pdev)
>   	return ret;
>   }
>   
> +static int scp_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct resource *res;
> +	struct mtk_scp_of_regs scp_regs;
> +	int ret;
> +
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
> +	scp_regs.reg_base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(scp_regs.reg_base))
> +		return dev_err_probe(dev, PTR_ERR(scp_regs.reg_base),
> +				     "Failed to parse and map cfg memory\n");
> +
> +	/* l1tcm is an optional memory region */
> +	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
> +	scp_regs.l1tcm_base = devm_ioremap_resource(dev, res);
> +	if (IS_ERR(scp_regs.l1tcm_base)) {
> +		ret = PTR_ERR(scp_regs.l1tcm_base);
> +		if (ret != -EINVAL)
> +			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
> +	} else {
> +		scp_regs.l1tcm_size = resource_size(res);
> +		scp_regs.l1tcm_phys = res->start;
> +	}
> +
> +	return scp_rproc_init(pdev, &scp_regs);
> +}
> +
>   static int scp_remove(struct platform_device *pdev)
>   {
>   	struct mtk_scp *scp = platform_get_drvdata(pdev);