Re: [PATCH v9 05/11] remoteproc: mediatek: Extract remoteproc initialization flow

TingHan Shen (沈廷翰)
2023-04-19T03:38:41Z

Hi Mathieu,

On Fri, 2023-03-31 at 11:44 -0600, Mathieu Poirier wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
>
>
> On Tue, Mar 28, 2023 at 10:27:27AM +0800, Tinghan Shen wrote:
> > This is the preparation for probing multi-core SCP. The remoteproc
> > initialization flow is similar on cores and is reused 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@mediatek.com>
> > Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> > ---
> > drivers/remoteproc/mtk_scp.c | 64 +++++++++++++++++++++++++-----------
> > 1 file changed, 45 insertions(+), 19 deletions(-)
> >
> > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> > index a3b9bc158cd9..32ecd1450c6f 100644
> > --- a/drivers/remoteproc/mtk_scp.c
> > +++ b/drivers/remoteproc/mtk_scp.c
> > @@ -23,6 +23,13 @@
> > #define MAX_CODE_SIZE 0x500000
> > #define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
> >
> > +struct mtk_scp_of_regs {
> > + void __iomem *reg_base;
> > + void __iomem *l1tcm_base;
> > + size_t l1tcm_size;
> > + phys_addr_t l1tcm_phys;
> > +};
> > +
>
> This should represent the cluster with a list of mtk_scp instead of @cluster_cores as
> introduced in the next patch.

If I'm understanding you correctly, you're suggesting that @cluster_cores should be included
as a member of this structure. Is that correct?

Best regards,
TingHan

>
> > /**
> > * scp_get() - get a reference to SCP.
> > *
> > @@ -855,7 +862,8 @@ 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;
> > @@ -879,6 +887,11 @@ 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))
> > @@ -888,24 +901,6 @@ 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_base = NULL;
>
> > - 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;
> > @@ -957,6 +952,37 @@ static int scp_probe(struct platform_device *pdev)
> > return ret;
> > }
> >
> > +static int scp_probe(struct platform_device *pdev)
> > +{
> > + struct device *dev = &pdev->dev;
> > + struct mtk_scp_of_regs scp_regs;
> > + struct resource *res;
> > + 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");
> > +
> > + scp_regs.l1tcm_size = 0;
> > + scp_regs.l1tcm_phys = 0;
> > + } 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);
> > --
> > 2.18.0
> >

--
Best regards,
TingHan