| Message ID | 20230426091211.21557-6-tinghan.shen@mediatek.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for MT8195 SCP 2nd core | expand |
Hi Tinghan, On Wed, Apr 26, 2023 at 05:12:05PM +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 | 69 ++++++++++++++++++++++++++---------- > 1 file changed, 50 insertions(+), 19 deletions(-) > > diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c > index 2bf66b1a8d80..5e4982f4d5dc 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_cluster { > + void __iomem *reg_base; > + void __iomem *l1tcm_base; > + size_t l1tcm_size; > + phys_addr_t l1tcm_phys; > +}; This is a good start. > + > /** > * scp_get() - get a reference to SCP. > * > @@ -855,10 +862,11 @@ 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 device *dev = &pdev->dev; > struct device_node *np = dev->of_node; > + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); 1) Because of the work done in the next patch, I think a "struct mtk_scp_of_cluster *" should be given as a parameter to scp_rproc_init(). 2) I would rename of_cluster to scp_cluster. > struct mtk_scp *scp; > struct rproc *rproc; > struct resource *res; > @@ -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_cluster->reg_base; > + scp->l1tcm_base = of_cluster->l1tcm_base; > + scp->l1tcm_size = of_cluster->l1tcm_size; > + scp->l1tcm_phys = of_cluster->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_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 +952,42 @@ 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_cluster *of_cluster; > + struct resource *res; > + int ret; > + > + of_cluster = devm_kzalloc(&pdev->dev, sizeof(*of_cluster), GFP_KERNEL); > + if (!of_cluster) > + return -ENOMEM; > + > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg"); > + of_cluster->reg_base = devm_ioremap_resource(dev, res); > + if (IS_ERR(of_cluster->reg_base)) > + return dev_err_probe(dev, PTR_ERR(of_cluster->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"); > + of_cluster->l1tcm_base = devm_ioremap_resource(dev, res); > + if (IS_ERR(of_cluster->l1tcm_base)) { > + ret = PTR_ERR(of_cluster->l1tcm_base); > + if (ret != -EINVAL) > + return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n"); > + > + of_cluster->l1tcm_base = NULL; > + } else { > + of_cluster->l1tcm_size = resource_size(res); > + of_cluster->l1tcm_phys = res->start; > + } > + > + platform_set_drvdata(pdev, of_cluster); > + In scp_rproc_init() pdev->dev->driver_data is set to a *scp, which defeats the purpose of setting here. Once the driver data for @pdev is set, it doesn't change after that. > + return scp_rproc_init(pdev); Function scp_rproc_init() needs to return an *scp and that scp needs to be added to the list of SCPs in scp_cluster. > +} > + > static int scp_remove(struct platform_device *pdev) > { > struct mtk_scp *scp = platform_get_drvdata(pdev); This should be: struct mtk_scp_of_cluster *scp_cluster = platform_get_drvdata(pdev); And then iterate over the list of SCPs to remove each scp. That way things work the same way regardless of the amount of scp in the system. > -- > 2.18.0 >
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c index 2bf66b1a8d80..5e4982f4d5dc 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_cluster { + void __iomem *reg_base; + void __iomem *l1tcm_base; + size_t l1tcm_size; + phys_addr_t l1tcm_phys; +}; + /** * scp_get() - get a reference to SCP. * @@ -855,10 +862,11 @@ 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 device *dev = &pdev->dev; struct device_node *np = dev->of_node; + struct mtk_scp_of_cluster *of_cluster = platform_get_drvdata(pdev); struct mtk_scp *scp; struct rproc *rproc; struct resource *res; @@ -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_cluster->reg_base; + scp->l1tcm_base = of_cluster->l1tcm_base; + scp->l1tcm_size = of_cluster->l1tcm_size; + scp->l1tcm_phys = of_cluster->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_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 +952,42 @@ 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_cluster *of_cluster; + struct resource *res; + int ret; + + of_cluster = devm_kzalloc(&pdev->dev, sizeof(*of_cluster), GFP_KERNEL); + if (!of_cluster) + return -ENOMEM; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg"); + of_cluster->reg_base = devm_ioremap_resource(dev, res); + if (IS_ERR(of_cluster->reg_base)) + return dev_err_probe(dev, PTR_ERR(of_cluster->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"); + of_cluster->l1tcm_base = devm_ioremap_resource(dev, res); + if (IS_ERR(of_cluster->l1tcm_base)) { + ret = PTR_ERR(of_cluster->l1tcm_base); + if (ret != -EINVAL) + return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n"); + + of_cluster->l1tcm_base = NULL; + } else { + of_cluster->l1tcm_size = resource_size(res); + of_cluster->l1tcm_phys = res->start; + } + + platform_set_drvdata(pdev, of_cluster); + + return scp_rproc_init(pdev); +} + static int scp_remove(struct platform_device *pdev) { struct mtk_scp *scp = platform_get_drvdata(pdev);