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

[TingHan Shen (沈廷翰)]

On Fri, 2023-02-10 at 15:02 +0100, AngeloGioacchino Del Regno wrote:
> 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.

I'm sorry. I missed this part.
I'll update this in next version.

> 
> 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);
> 
> 

-- 
Best regards,
TingHan